TY  - JOUR
AU  - Anđelković, Katarina K.
AU  - Sladić, Dušan
AU  - Bacchi, Alessia
AU  - Pelizzi, G
AU  - Filipović, Nenad R.
AU  - Rajkovic, M
PY  - 2005
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/694
AB  - Complexes of zinc and iron with N', N'(2)- bis[(1E)-1-(2-pyridyl) ethylidene] ethanedihydrazide (H(2)L1) and N', N'(2)-bis[( 1E)-1-(2-pyridyl) ethylidene] propanedihydrazide (H(2)L2) were prepared. Zn-II complexes with both ligands have an octahedral geometry. In the complex of Zn-II with H(2)L1, the ligand is coordinated as a tridentate species in the monoanionic form, building two five-membered rings around Zn-II. Three remaining coordination sites are occupied by water molecules, and in the outer sphere there is a ClO4- ion. In the other Zn-II complex, the H(2)L2 ligand is coordinated in the enol form as a tetradenate species, forming a five-memebered, a six-membered and a seven-membered ring, the remaining coordination sites being occupied by water molecules, while in the outer sphere there are two ClO4- ions. The Fe-III complex with H(2)L2 is a high-spin octahedral complex. The ligand is coordinated in the enol form, in a tetradentate fashion via pyridine and hydrazone nitrogens. The remaining two coordination sites in the complex are occupied by water molecules and a Cl) ion, and in the outer sphere there are two Cl) anions. The octahedral Fe-III complex obtained from the reaction of FeCl(3)center dot 6H(2)O and H(2)L1 in absolute ethanol has the formula [Fe(HL1) Cl-2(H(2)0)] center dot 1.5H(2)O. However, during coordination of the H(2)L1 ligand to Fe-III in water, oxidative degradation of the side chain ( - CO - CO -) and reduction of Fe-III to Fe-II occurs, affording octahedral tris(1-(2-pyridyl) ethylidenehydrazine] iron(II) perchlorate, as confirmed by X-ray structure analysis.
PB  - Springer, Dordrecht
T2  - Transition Metal Chemistry
T1  - Complexes of iron(II), iron(III) and zinc(II) with condensation derivatives of 2-acetylpyridine and oxalic or malonic dihydrazide. Crystal structure of tris[(1-(2-pyridyl)ethylidene)hydrazine]iron(II) perchlorate
VL  - 30
IS  - 2
SP  - 243
EP  - 250
DO  - 10.1007/s11243-004-3173-1
ER  - 

@article{
author = "Anđelković, Katarina K. and Sladić, Dušan and Bacchi, Alessia and Pelizzi, G and Filipović, Nenad R. and Rajkovic, M",
year = "2005",
abstract = "Complexes of zinc and iron with N', N'(2)- bis[(1E)-1-(2-pyridyl) ethylidene] ethanedihydrazide (H(2)L1) and N', N'(2)-bis[( 1E)-1-(2-pyridyl) ethylidene] propanedihydrazide (H(2)L2) were prepared. Zn-II complexes with both ligands have an octahedral geometry. In the complex of Zn-II with H(2)L1, the ligand is coordinated as a tridentate species in the monoanionic form, building two five-membered rings around Zn-II. Three remaining coordination sites are occupied by water molecules, and in the outer sphere there is a ClO4- ion. In the other Zn-II complex, the H(2)L2 ligand is coordinated in the enol form as a tetradenate species, forming a five-memebered, a six-membered and a seven-membered ring, the remaining coordination sites being occupied by water molecules, while in the outer sphere there are two ClO4- ions. The Fe-III complex with H(2)L2 is a high-spin octahedral complex. The ligand is coordinated in the enol form, in a tetradentate fashion via pyridine and hydrazone nitrogens. The remaining two coordination sites in the complex are occupied by water molecules and a Cl) ion, and in the outer sphere there are two Cl) anions. The octahedral Fe-III complex obtained from the reaction of FeCl(3)center dot 6H(2)O and H(2)L1 in absolute ethanol has the formula [Fe(HL1) Cl-2(H(2)0)] center dot 1.5H(2)O. However, during coordination of the H(2)L1 ligand to Fe-III in water, oxidative degradation of the side chain ( - CO - CO -) and reduction of Fe-III to Fe-II occurs, affording octahedral tris(1-(2-pyridyl) ethylidenehydrazine] iron(II) perchlorate, as confirmed by X-ray structure analysis.",
publisher = "Springer, Dordrecht",
journal = "Transition Metal Chemistry",
title = "Complexes of iron(II), iron(III) and zinc(II) with condensation derivatives of 2-acetylpyridine and oxalic or malonic dihydrazide. Crystal structure of tris[(1-(2-pyridyl)ethylidene)hydrazine]iron(II) perchlorate",
volume = "30",
number = "2",
pages = "243-250",
doi = "10.1007/s11243-004-3173-1"
}

Anđelković, K. K., Sladić, D., Bacchi, A., Pelizzi, G., Filipović, N. R.,& Rajkovic, M.. (2005). Complexes of iron(II), iron(III) and zinc(II) with condensation derivatives of 2-acetylpyridine and oxalic or malonic dihydrazide. Crystal structure of tris[(1-(2-pyridyl)ethylidene)hydrazine]iron(II) perchlorate. in Transition Metal Chemistry
Springer, Dordrecht., 30(2), 243-250.
https://doi.org/10.1007/s11243-004-3173-1

Anđelković KK, Sladić D, Bacchi A, Pelizzi G, Filipović NR, Rajkovic M. Complexes of iron(II), iron(III) and zinc(II) with condensation derivatives of 2-acetylpyridine and oxalic or malonic dihydrazide. Crystal structure of tris[(1-(2-pyridyl)ethylidene)hydrazine]iron(II) perchlorate. in Transition Metal Chemistry. 2005;30(2):243-250.
doi:10.1007/s11243-004-3173-1 .

Anđelković, Katarina K., Sladić, Dušan, Bacchi, Alessia, Pelizzi, G, Filipović, Nenad R., Rajkovic, M, "Complexes of iron(II), iron(III) and zinc(II) with condensation derivatives of 2-acetylpyridine and oxalic or malonic dihydrazide. Crystal structure of tris[(1-(2-pyridyl)ethylidene)hydrazine]iron(II) perchlorate" in Transition Metal Chemistry, 30, no. 2 (2005):243-250,
https://doi.org/10.1007/s11243-004-3173-1 . .

TY  - JOUR
AU  - Filipović, Nenad R.
AU  - Bacchi, Alessia
AU  - Pelizzi, G
AU  - Marković, R.
AU  - Mitić, D
AU  - Anđelković, Katarina K.
PY  - 2005
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/738
AB  - Four Co(III), Zn(II), Pd(II) and Cd(II) complexes with ligands derived in situ from acetylpyridine and ethyl hydrazinoacetate or hydrolysed ethyl hydrazinoacetate were prepared. An X-ray structural analysis showed that the Co(III) complex is octahedral with two tridentate (E)-2-[N'-(1-pyridin-2-yl-ethylidene) hydrazino] acetate (apha) ligands, each forming two five-membered rings with the metal ion. In the tetrahedral Zn(II) complex, only a single apha ligand was coordinated, in the same way as that in the Co(III) complex. In the case of the tetrahedral Cd(II) complex the non-hydrolysed form of (E)-2-[N'-(1-pyridin2-yl-ethylidene)hydrazino]acetic acid ethyl ester (aphaoet) coordinated as a bidentate and the two remaining coordination sites were occupied by Cl- and CH3COO- ions. In addition, the square-planar neutral Pd(II) complex was synthesized, having the same bidentate as in the Cd(II) complex and two Cl- ions in the remaining coordination sites. Due to their being diamagnetic, all four complexes were characterized by H-1-NMR and C-13-NMR spectroscopy.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Journal of Coordination Chemistry
T1  - Cobalt(III), zinc(II), cadmium(II) and palladium(II) complexes with the hydrolysed and non-hydrolysed condensation products of 2-acetylpyridine with ethyl hydrazinoacetate: X-ray structure analysis of mer-bis{(E)-2-[N '-(1-pyridin-2-yl-ethylidene)hydrazin
VL  - 58
IS  - 17
SP  - 1541
EP  - 1550
DO  - 10.1080/00958970500240383
ER  - 

@article{
author = "Filipović, Nenad R. and Bacchi, Alessia and Pelizzi, G and Marković, R. and Mitić, D and Anđelković, Katarina K.",
year = "2005",
abstract = "Four Co(III), Zn(II), Pd(II) and Cd(II) complexes with ligands derived in situ from acetylpyridine and ethyl hydrazinoacetate or hydrolysed ethyl hydrazinoacetate were prepared. An X-ray structural analysis showed that the Co(III) complex is octahedral with two tridentate (E)-2-[N'-(1-pyridin-2-yl-ethylidene) hydrazino] acetate (apha) ligands, each forming two five-membered rings with the metal ion. In the tetrahedral Zn(II) complex, only a single apha ligand was coordinated, in the same way as that in the Co(III) complex. In the case of the tetrahedral Cd(II) complex the non-hydrolysed form of (E)-2-[N'-(1-pyridin2-yl-ethylidene)hydrazino]acetic acid ethyl ester (aphaoet) coordinated as a bidentate and the two remaining coordination sites were occupied by Cl- and CH3COO- ions. In addition, the square-planar neutral Pd(II) complex was synthesized, having the same bidentate as in the Cd(II) complex and two Cl- ions in the remaining coordination sites. Due to their being diamagnetic, all four complexes were characterized by H-1-NMR and C-13-NMR spectroscopy.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Journal of Coordination Chemistry",
title = "Cobalt(III), zinc(II), cadmium(II) and palladium(II) complexes with the hydrolysed and non-hydrolysed condensation products of 2-acetylpyridine with ethyl hydrazinoacetate: X-ray structure analysis of mer-bis{(E)-2-[N '-(1-pyridin-2-yl-ethylidene)hydrazin",
volume = "58",
number = "17",
pages = "1541-1550",
doi = "10.1080/00958970500240383"
}

Filipović, N. R., Bacchi, A., Pelizzi, G., Marković, R., Mitić, D.,& Anđelković, K. K.. (2005). Cobalt(III), zinc(II), cadmium(II) and palladium(II) complexes with the hydrolysed and non-hydrolysed condensation products of 2-acetylpyridine with ethyl hydrazinoacetate: X-ray structure analysis of mer-bis{(E)-2-[N '-(1-pyridin-2-yl-ethylidene)hydrazin. in Journal of Coordination Chemistry
Taylor & Francis Ltd, Abingdon., 58(17), 1541-1550.
https://doi.org/10.1080/00958970500240383

Filipović NR, Bacchi A, Pelizzi G, Marković R, Mitić D, Anđelković KK. Cobalt(III), zinc(II), cadmium(II) and palladium(II) complexes with the hydrolysed and non-hydrolysed condensation products of 2-acetylpyridine with ethyl hydrazinoacetate: X-ray structure analysis of mer-bis{(E)-2-[N '-(1-pyridin-2-yl-ethylidene)hydrazin. in Journal of Coordination Chemistry. 2005;58(17):1541-1550.
doi:10.1080/00958970500240383 .

Filipović, Nenad R., Bacchi, Alessia, Pelizzi, G, Marković, R., Mitić, D, Anđelković, Katarina K., "Cobalt(III), zinc(II), cadmium(II) and palladium(II) complexes with the hydrolysed and non-hydrolysed condensation products of 2-acetylpyridine with ethyl hydrazinoacetate: X-ray structure analysis of mer-bis{(E)-2-[N '-(1-pyridin-2-yl-ethylidene)hydrazin" in Journal of Coordination Chemistry, 58, no. 17 (2005):1541-1550,
https://doi.org/10.1080/00958970500240383 . .

TY  - JOUR
AU  - Bacchi, Alessia
AU  - Pelizzi, G
AU  - Jeremić, Dejan
AU  - Sladić, Dušan
AU  - Gruden-Pavlović, Maja
AU  - Anđelković, Katarina K.
PY  - 2003
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/159
AB  - The octahedral copper(II) complex with two 2'-[1-(2-pyridinyl) ethylidene] oxalohydrazide molecules was synthesized from bis(acetylacetonato) copper(II) and 2'-[1-(2-pyridinyl) ethylidene] oxamohydrazide (Hapsox). The complex is unstable when not in solution. X-ray analysis confirmed the tridentate coordination of the ligands in the monoanionic form. In addition, the stable tetrahedral copper(II) complex with one ligand molecule coordinated as a tridentate in the dianionic form was prepared by direct synthesis from Cu(NO3)(2) . 3H(2)O and Hapsox, and characterized by elemental analysis, magnetic measurements and by i.r. and u.v./vis. spectrophotometry.
PB  - Kluwer Academic Publ, Dordrecht
T2  - Transition Metal Chemistry
T1  - Synthesis and structural characterization of copper(II) complexes with the 2 '-[1-(2-pyridinyl)ethylidene]oxalohydrazide ligand
VL  - 28
IS  - 8
SP  - 935
EP  - 938
DO  - 10.1023/A:1026316611296
ER  - 

@article{
author = "Bacchi, Alessia and Pelizzi, G and Jeremić, Dejan and Sladić, Dušan and Gruden-Pavlović, Maja and Anđelković, Katarina K.",
year = "2003",
abstract = "The octahedral copper(II) complex with two 2'-[1-(2-pyridinyl) ethylidene] oxalohydrazide molecules was synthesized from bis(acetylacetonato) copper(II) and 2'-[1-(2-pyridinyl) ethylidene] oxamohydrazide (Hapsox). The complex is unstable when not in solution. X-ray analysis confirmed the tridentate coordination of the ligands in the monoanionic form. In addition, the stable tetrahedral copper(II) complex with one ligand molecule coordinated as a tridentate in the dianionic form was prepared by direct synthesis from Cu(NO3)(2) . 3H(2)O and Hapsox, and characterized by elemental analysis, magnetic measurements and by i.r. and u.v./vis. spectrophotometry.",
publisher = "Kluwer Academic Publ, Dordrecht",
journal = "Transition Metal Chemistry",
title = "Synthesis and structural characterization of copper(II) complexes with the 2 '-[1-(2-pyridinyl)ethylidene]oxalohydrazide ligand",
volume = "28",
number = "8",
pages = "935-938",
doi = "10.1023/A:1026316611296"
}

Bacchi, A., Pelizzi, G., Jeremić, D., Sladić, D., Gruden-Pavlović, M.,& Anđelković, K. K.. (2003). Synthesis and structural characterization of copper(II) complexes with the 2 '-[1-(2-pyridinyl)ethylidene]oxalohydrazide ligand. in Transition Metal Chemistry
Kluwer Academic Publ, Dordrecht., 28(8), 935-938.
https://doi.org/10.1023/A:1026316611296

Bacchi A, Pelizzi G, Jeremić D, Sladić D, Gruden-Pavlović M, Anđelković KK. Synthesis and structural characterization of copper(II) complexes with the 2 '-[1-(2-pyridinyl)ethylidene]oxalohydrazide ligand. in Transition Metal Chemistry. 2003;28(8):935-938.
doi:10.1023/A:1026316611296 .

Bacchi, Alessia, Pelizzi, G, Jeremić, Dejan, Sladić, Dušan, Gruden-Pavlović, Maja, Anđelković, Katarina K., "Synthesis and structural characterization of copper(II) complexes with the 2 '-[1-(2-pyridinyl)ethylidene]oxalohydrazide ligand" in Transition Metal Chemistry, 28, no. 8 (2003):935-938,
https://doi.org/10.1023/A:1026316611296 . .

TY  - JOUR
AU  - Anđelković, Katarina K.
AU  - Bacchi, Alessia
AU  - Pelizzi, G
AU  - Jeremić, Dejan
AU  - Ivanović-Burmazović, Ivana
PY  - 2002
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/539
AB  - The title compound was prepared by a template synthesis from 2,6-diacetylpyridine, dioxamohydrazide and Fe(ClO4)(3) . 6H(2)O (mol ratio 1: 2: 1) in MeOH/H2O (3:1) solution and its structure determined by single-crystal X-ray diffraction; triclinic, space group P (1) over bar, a= 7.5186(7), b = 10.9730(9), c = 14.6110(10) Angstrom, alpha = 95.866(1), beta = 100.252(1), gamma = 92.895(1), z = 2. The polydentate ligand is coordinated as a dianionic pentadentate while water molecules occupy apical positions in the structure. This is the first example of a monomeric, pentagonal bipyramidal structure of an Fe(III) complex with a dianionic bis(acylhydrazone) derivative of 2,6-diacetylpyridine.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Journal of Coordination Chemistry
T1  - An Fe(III) complex with the dianionic form of 2,6-diacetylpyridine bis(acylhydrazone). The crystal structure of [diaqua-2 ',2 ''-(2,6-pyridinediyldiethylidyne)dioxamo-hydrazide]iron(III) perchlorate trihydrate, [Fe(dapsox)(H2O)(2)]ClO4 center dot 3H(2)O
VL  - 55
IS  - 12
SP  - 1385
EP  - 1392
DO  - 10.1080/0095897021000058600
ER  - 

@article{
author = "Anđelković, Katarina K. and Bacchi, Alessia and Pelizzi, G and Jeremić, Dejan and Ivanović-Burmazović, Ivana",
year = "2002",
abstract = "The title compound was prepared by a template synthesis from 2,6-diacetylpyridine, dioxamohydrazide and Fe(ClO4)(3) . 6H(2)O (mol ratio 1: 2: 1) in MeOH/H2O (3:1) solution and its structure determined by single-crystal X-ray diffraction; triclinic, space group P (1) over bar, a= 7.5186(7), b = 10.9730(9), c = 14.6110(10) Angstrom, alpha = 95.866(1), beta = 100.252(1), gamma = 92.895(1), z = 2. The polydentate ligand is coordinated as a dianionic pentadentate while water molecules occupy apical positions in the structure. This is the first example of a monomeric, pentagonal bipyramidal structure of an Fe(III) complex with a dianionic bis(acylhydrazone) derivative of 2,6-diacetylpyridine.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Journal of Coordination Chemistry",
title = "An Fe(III) complex with the dianionic form of 2,6-diacetylpyridine bis(acylhydrazone). The crystal structure of [diaqua-2 ',2 ''-(2,6-pyridinediyldiethylidyne)dioxamo-hydrazide]iron(III) perchlorate trihydrate, [Fe(dapsox)(H2O)(2)]ClO4 center dot 3H(2)O",
volume = "55",
number = "12",
pages = "1385-1392",
doi = "10.1080/0095897021000058600"
}

Anđelković, K. K., Bacchi, A., Pelizzi, G., Jeremić, D.,& Ivanović-Burmazović, I.. (2002). An Fe(III) complex with the dianionic form of 2,6-diacetylpyridine bis(acylhydrazone). The crystal structure of [diaqua-2 ',2 ''-(2,6-pyridinediyldiethylidyne)dioxamo-hydrazide]iron(III) perchlorate trihydrate, [Fe(dapsox)(H2O)(2)]ClO4 center dot 3H(2)O. in Journal of Coordination Chemistry
Taylor & Francis Ltd, Abingdon., 55(12), 1385-1392.
https://doi.org/10.1080/0095897021000058600

Anđelković KK, Bacchi A, Pelizzi G, Jeremić D, Ivanović-Burmazović I. An Fe(III) complex with the dianionic form of 2,6-diacetylpyridine bis(acylhydrazone). The crystal structure of [diaqua-2 ',2 ''-(2,6-pyridinediyldiethylidyne)dioxamo-hydrazide]iron(III) perchlorate trihydrate, [Fe(dapsox)(H2O)(2)]ClO4 center dot 3H(2)O. in Journal of Coordination Chemistry. 2002;55(12):1385-1392.
doi:10.1080/0095897021000058600 .

Anđelković, Katarina K., Bacchi, Alessia, Pelizzi, G, Jeremić, Dejan, Ivanović-Burmazović, Ivana, "An Fe(III) complex with the dianionic form of 2,6-diacetylpyridine bis(acylhydrazone). The crystal structure of [diaqua-2 ',2 ''-(2,6-pyridinediyldiethylidyne)dioxamo-hydrazide]iron(III) perchlorate trihydrate, [Fe(dapsox)(H2O)(2)]ClO4 center dot 3H(2)O" in Journal of Coordination Chemistry, 55, no. 12 (2002):1385-1392,
https://doi.org/10.1080/0095897021000058600 . .

TY  - JOUR
AU  - Bacchi, Alessia
AU  - Ivanović-Burmazović, Ivana
AU  - Pelizzi, G
AU  - Anđelković, Katarina K.
PY  - 2001
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/450
AB  - The synthesis of two Fe(III) complexes with a doubly deprotonated polydentate of the acylhydrazone class is described. The first complex was obtained by hydrolyzing the previously synthesized high-spin pentagonal-bipyramidal (PBP) [Fe(Hdapsox)Cl-2] (H(2)dapsox = 2',2"'-(2,6-pyridindiyldiethylidene)dioxamohydrazide); the second was obtained by a template synthesis in a base medium starting from iron(III) chloride, 2,6-diacetylpyridine (dap) and semioxamazide (sox) (in a 1:1:2 molar ratio). Hydrolysis, during which the semioxamazide amide group changed into a carboxyl group, resulted in the mu -oxo-diiron(III) complex [Fe(dapoamh)(H2O)(2)O . 3H(2)O (H(2)dapoamh = dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene)diacetic acid) with a doubly deprotonated acylhydrazone that retained its PBP geometry. The [Fe(dapsox)Cl].H2O complex obtained in the latter case has a square-pyramidal geometry with an asymmetrically coordinated, but still doubly deprotonated dapsox as a tetradentate. The structure of the [Fe(dapoamh)(H2O)(2)O . 3H(2)O complex determined by single-crystal X-ray analysis in this work represents the first mu -oxo-dimer of a PBP geometry with an acyclic polydentate. This is also the first diamagnetic Cl-oxo-diiron(III) complex ever obtained; this not only points to the super-exchange interaction over an ore-oxygen, but also to a significant interaction between the two low-spin Fe(III) ion d-orbitals. Based on the EPR spectra, it has been established that the monomer [Fe(dapsox)Cl].H2O complex is among the rare Fe(III) complexes with an intermediate spin state S = 3/2, and that a temperature decrease causes it to change to a low-spin complex, i.e. it demonstrates a cross-over (S = 3/2 reversible arrow S = 1/2). Further characterization has been done by IR and UV-VIS spectroscopy, and also by measuring the magnetic momentum at 293, 195 and 77 K. The results of this work, as well as of the previously synthesized Cu(II), Co(II) and Ni(II) complexes with H(2)dapsox, Hdapsox(-) and dapsox(2-), have led us to the conclusion that the doubly deprotonated acylhydrazone ligand has a considerably stronger field than its neutral or monoanionic forms. (C) 2001 Elsevier Science B.V. All rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Inorganica Chimica Acta
T1  - The Fe(III) complexes with a doubly deprotonated polydentate acylhydrazone: crystal structure of the first diamagnetic mu-oxo-diiron(III) complex
VL  - 313
IS  - 1-2
SP  - 109
EP  - 119
DO  - 10.1016/S0020-1693(00)00377-7
ER  - 

@article{
author = "Bacchi, Alessia and Ivanović-Burmazović, Ivana and Pelizzi, G and Anđelković, Katarina K.",
year = "2001",
abstract = "The synthesis of two Fe(III) complexes with a doubly deprotonated polydentate of the acylhydrazone class is described. The first complex was obtained by hydrolyzing the previously synthesized high-spin pentagonal-bipyramidal (PBP) [Fe(Hdapsox)Cl-2] (H(2)dapsox = 2',2"'-(2,6-pyridindiyldiethylidene)dioxamohydrazide); the second was obtained by a template synthesis in a base medium starting from iron(III) chloride, 2,6-diacetylpyridine (dap) and semioxamazide (sox) (in a 1:1:2 molar ratio). Hydrolysis, during which the semioxamazide amide group changed into a carboxyl group, resulted in the mu -oxo-diiron(III) complex [Fe(dapoamh)(H2O)(2)O . 3H(2)O (H(2)dapoamh = dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene)diacetic acid) with a doubly deprotonated acylhydrazone that retained its PBP geometry. The [Fe(dapsox)Cl].H2O complex obtained in the latter case has a square-pyramidal geometry with an asymmetrically coordinated, but still doubly deprotonated dapsox as a tetradentate. The structure of the [Fe(dapoamh)(H2O)(2)O . 3H(2)O complex determined by single-crystal X-ray analysis in this work represents the first mu -oxo-dimer of a PBP geometry with an acyclic polydentate. This is also the first diamagnetic Cl-oxo-diiron(III) complex ever obtained; this not only points to the super-exchange interaction over an ore-oxygen, but also to a significant interaction between the two low-spin Fe(III) ion d-orbitals. Based on the EPR spectra, it has been established that the monomer [Fe(dapsox)Cl].H2O complex is among the rare Fe(III) complexes with an intermediate spin state S = 3/2, and that a temperature decrease causes it to change to a low-spin complex, i.e. it demonstrates a cross-over (S = 3/2 reversible arrow S = 1/2). Further characterization has been done by IR and UV-VIS spectroscopy, and also by measuring the magnetic momentum at 293, 195 and 77 K. The results of this work, as well as of the previously synthesized Cu(II), Co(II) and Ni(II) complexes with H(2)dapsox, Hdapsox(-) and dapsox(2-), have led us to the conclusion that the doubly deprotonated acylhydrazone ligand has a considerably stronger field than its neutral or monoanionic forms. (C) 2001 Elsevier Science B.V. All rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Inorganica Chimica Acta",
title = "The Fe(III) complexes with a doubly deprotonated polydentate acylhydrazone: crystal structure of the first diamagnetic mu-oxo-diiron(III) complex",
volume = "313",
number = "1-2",
pages = "109-119",
doi = "10.1016/S0020-1693(00)00377-7"
}

Bacchi, A., Ivanović-Burmazović, I., Pelizzi, G.,& Anđelković, K. K.. (2001). The Fe(III) complexes with a doubly deprotonated polydentate acylhydrazone: crystal structure of the first diamagnetic mu-oxo-diiron(III) complex. in Inorganica Chimica Acta
Elsevier Science Sa, Lausanne., 313(1-2), 109-119.
https://doi.org/10.1016/S0020-1693(00)00377-7

Bacchi A, Ivanović-Burmazović I, Pelizzi G, Anđelković KK. The Fe(III) complexes with a doubly deprotonated polydentate acylhydrazone: crystal structure of the first diamagnetic mu-oxo-diiron(III) complex. in Inorganica Chimica Acta. 2001;313(1-2):109-119.
doi:10.1016/S0020-1693(00)00377-7 .

Bacchi, Alessia, Ivanović-Burmazović, Ivana, Pelizzi, G, Anđelković, Katarina K., "The Fe(III) complexes with a doubly deprotonated polydentate acylhydrazone: crystal structure of the first diamagnetic mu-oxo-diiron(III) complex" in Inorganica Chimica Acta, 313, no. 1-2 (2001):109-119,
https://doi.org/10.1016/S0020-1693(00)00377-7 . .

TY  - JOUR
AU  - Pelizzi, G
AU  - Bacchi, Alessia
AU  - Ivanović-Burmazović, Ivana
AU  - Gruden-Pavlović, Maja
AU  - Anđelković, Katarina K.
PY  - 2001
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/458
AB  - The octahedral Ni(II) complex with dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene)diacetic acid (H(2)dapoamh) was synthesized and X-ray analysis confirmed the tridentate coordination for the neutral ligand. Besides, the square planar Ni(II) complex with dianion 2 ', 2 ' ' '-(2,6-pyridinediyldiethylidyne)dioxamohydrazide (H(2)dapsox) was synthesized and characterized. (C) 2001 Elsevier Science B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Inorganic Chemistry Communications
T1  - Ni(II) complexes with neutral and dianionic form of 2,6-diacetylpyridine bis(acylhydrazones). Crystal structure of bis[dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene) diacetic acid]nickel(II) perchlorate
VL  - 4
IS  - 6
SP  - 311
EP  - 314
DO  - 10.1016/S1387-7003(01)00161-7
ER  - 

@article{
author = "Pelizzi, G and Bacchi, Alessia and Ivanović-Burmazović, Ivana and Gruden-Pavlović, Maja and Anđelković, Katarina K.",
year = "2001",
abstract = "The octahedral Ni(II) complex with dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene)diacetic acid (H(2)dapoamh) was synthesized and X-ray analysis confirmed the tridentate coordination for the neutral ligand. Besides, the square planar Ni(II) complex with dianion 2 ', 2 ' ' '-(2,6-pyridinediyldiethylidyne)dioxamohydrazide (H(2)dapsox) was synthesized and characterized. (C) 2001 Elsevier Science B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Inorganic Chemistry Communications",
title = "Ni(II) complexes with neutral and dianionic form of 2,6-diacetylpyridine bis(acylhydrazones). Crystal structure of bis[dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene) diacetic acid]nickel(II) perchlorate",
volume = "4",
number = "6",
pages = "311-314",
doi = "10.1016/S1387-7003(01)00161-7"
}

Pelizzi, G., Bacchi, A., Ivanović-Burmazović, I., Gruden-Pavlović, M.,& Anđelković, K. K.. (2001). Ni(II) complexes with neutral and dianionic form of 2,6-diacetylpyridine bis(acylhydrazones). Crystal structure of bis[dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene) diacetic acid]nickel(II) perchlorate. in Inorganic Chemistry Communications
Elsevier Science Bv, Amsterdam., 4(6), 311-314.
https://doi.org/10.1016/S1387-7003(01)00161-7

Pelizzi G, Bacchi A, Ivanović-Burmazović I, Gruden-Pavlović M, Anđelković KK. Ni(II) complexes with neutral and dianionic form of 2,6-diacetylpyridine bis(acylhydrazones). Crystal structure of bis[dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene) diacetic acid]nickel(II) perchlorate. in Inorganic Chemistry Communications. 2001;4(6):311-314.
doi:10.1016/S1387-7003(01)00161-7 .

Pelizzi, G, Bacchi, Alessia, Ivanović-Burmazović, Ivana, Gruden-Pavlović, Maja, Anđelković, Katarina K., "Ni(II) complexes with neutral and dianionic form of 2,6-diacetylpyridine bis(acylhydrazones). Crystal structure of bis[dioxo-2,6-pyridinediylbis(ethylidyne-1-hydrazinyl-2-ylidene) diacetic acid]nickel(II) perchlorate" in Inorganic Chemistry Communications, 4, no. 6 (2001):311-314,
https://doi.org/10.1016/S1387-7003(01)00161-7 . .

TY  - JOUR
AU  - Ivanović-Burmazović, Ivana
AU  - Bacchi, Alessia
AU  - Pelizzi, G
AU  - Leovac, Vukadin M.
AU  - Anđelković, Katarina K.
PY  - 1998
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/405
AB  - Starting from Cu(II) and Ni(II) perchlorate and Fe(III) chloride in the presence of 2,6-diacetylpyridine (dap) and semioxamazide (sox), the [Cu(Hdapsox)H2O]ClO4 (I), [Ni(Hdapsox)(MeOH)(2)]ClO4 (II) and [Fe(Hdapsox)Cl-2]. 1/2H(2)O (III) complexes with a singly deprotonated ligand Hdapsox(-) of the acyl hydrazone class (with H(2)dapsox = 2',2'''-(2,6-pyridindiyldiethylidene)dioxamohydrazide) have been obtained and characterized for the first time by a template synthesis. The previously assumed [1] square-pyramidal structure of the Cu(II) complex with an asymmetrical coordination of Hdapsox(-) has been confirmed by a single-crystal X-ray analysis. In II Hdapsox(-) is octahedrally coordinated around a Ni(II) ion, while III is found to be a pentagonal-bipyramidal complex with a symmetrically bonded Hdapsox(-). Causes of a ligand deprotonation occurring in a very acid medium (pH = 0) and of a different coordination pattern in the case of Cu(II), NI(II) and Fe(III) are interpreted by a d(n) configuration and an effective nuclear charge of the central metal ion (crystal field effects). (C) 1998 Elsevier Science Ltd. All rights reserved.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Polyhedron
T1  - Cu(II), Ni(II) and Fe(III) complexes with 2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazide in a monoanionic form. The crystal structure of aqua-2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazidecopper(II) perchlorate
VL  - 18
IS  - 1-2
SP  - 119
EP  - 127
DO  - 10.1016/S0277-5387(98)00274-5
ER  - 

@article{
author = "Ivanović-Burmazović, Ivana and Bacchi, Alessia and Pelizzi, G and Leovac, Vukadin M. and Anđelković, Katarina K.",
year = "1998",
abstract = "Starting from Cu(II) and Ni(II) perchlorate and Fe(III) chloride in the presence of 2,6-diacetylpyridine (dap) and semioxamazide (sox), the [Cu(Hdapsox)H2O]ClO4 (I), [Ni(Hdapsox)(MeOH)(2)]ClO4 (II) and [Fe(Hdapsox)Cl-2]. 1/2H(2)O (III) complexes with a singly deprotonated ligand Hdapsox(-) of the acyl hydrazone class (with H(2)dapsox = 2',2'''-(2,6-pyridindiyldiethylidene)dioxamohydrazide) have been obtained and characterized for the first time by a template synthesis. The previously assumed [1] square-pyramidal structure of the Cu(II) complex with an asymmetrical coordination of Hdapsox(-) has been confirmed by a single-crystal X-ray analysis. In II Hdapsox(-) is octahedrally coordinated around a Ni(II) ion, while III is found to be a pentagonal-bipyramidal complex with a symmetrically bonded Hdapsox(-). Causes of a ligand deprotonation occurring in a very acid medium (pH = 0) and of a different coordination pattern in the case of Cu(II), NI(II) and Fe(III) are interpreted by a d(n) configuration and an effective nuclear charge of the central metal ion (crystal field effects). (C) 1998 Elsevier Science Ltd. All rights reserved.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Polyhedron",
title = "Cu(II), Ni(II) and Fe(III) complexes with 2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazide in a monoanionic form. The crystal structure of aqua-2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazidecopper(II) perchlorate",
volume = "18",
number = "1-2",
pages = "119-127",
doi = "10.1016/S0277-5387(98)00274-5"
}

Ivanović-Burmazović, I., Bacchi, A., Pelizzi, G., Leovac, V. M.,& Anđelković, K. K.. (1998). Cu(II), Ni(II) and Fe(III) complexes with 2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazide in a monoanionic form. The crystal structure of aqua-2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazidecopper(II) perchlorate. in Polyhedron
Pergamon-Elsevier Science Ltd, Oxford., 18(1-2), 119-127.
https://doi.org/10.1016/S0277-5387(98)00274-5

Ivanović-Burmazović I, Bacchi A, Pelizzi G, Leovac VM, Anđelković KK. Cu(II), Ni(II) and Fe(III) complexes with 2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazide in a monoanionic form. The crystal structure of aqua-2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazidecopper(II) perchlorate. in Polyhedron. 1998;18(1-2):119-127.
doi:10.1016/S0277-5387(98)00274-5 .

Ivanović-Burmazović, Ivana, Bacchi, Alessia, Pelizzi, G, Leovac, Vukadin M., Anđelković, Katarina K., "Cu(II), Ni(II) and Fe(III) complexes with 2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazide in a monoanionic form. The crystal structure of aqua-2 ',2 '''-(2,6-pyridindiyldiethylidene)-dioxamohydrazidecopper(II) perchlorate" in Polyhedron, 18, no. 1-2 (1998):119-127,
https://doi.org/10.1016/S0277-5387(98)00274-5 . .