TY  - JOUR
AU  - Šumar-Ristović, Maja
AU  - Minić, Dragica M.
AU  - Poleti, Dejan
AU  - Miodragović, Zoran
AU  - Miodragović Đenana U.
AU  - Anđelković, Katarina K.
PY  - 2010
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1117
AB  - Thermal behavior of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand was investigated using the results of TG, DSC and DTG analysis obtained at different heating rates (2.5 to 30 A degrees C min(-1)), from room temperature to about 900 A degrees C. Mechanisms of complex degradation, as well as enthalpies of the degradation processes were determined. It is shown that thermal stability of investigated complexes correlates with their crystal structures, especially with the presence of crystallization and coordinated water molecules. The values of dehydration enthalpies are discussed and correlated with composition of the complexes. Kissinger's, Ozawa's, and Friedman's isoconversion methods were used for the determination of kinetic parameters: the pre-exponential factor A and the apparent activation energy E (a). For all three complexes and all steps of degradation, the values of kinetics parameters obtained by Kissinger's and Ozawa's methods are in good agreement. The results obtained by Friedman's method showed that some decomposition steps are simple and some others are complex ones.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand
VL  - 102
IS  - 1
SP  - 83
EP  - 90
DO  - 10.1007/s10973-010-0748-2
ER  - 

@article{
author = "Šumar-Ristović, Maja and Minić, Dragica M. and Poleti, Dejan and Miodragović, Zoran and Miodragović Đenana U. and Anđelković, Katarina K.",
year = "2010",
abstract = "Thermal behavior of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand was investigated using the results of TG, DSC and DTG analysis obtained at different heating rates (2.5 to 30 A degrees C min(-1)), from room temperature to about 900 A degrees C. Mechanisms of complex degradation, as well as enthalpies of the degradation processes were determined. It is shown that thermal stability of investigated complexes correlates with their crystal structures, especially with the presence of crystallization and coordinated water molecules. The values of dehydration enthalpies are discussed and correlated with composition of the complexes. Kissinger's, Ozawa's, and Friedman's isoconversion methods were used for the determination of kinetic parameters: the pre-exponential factor A and the apparent activation energy E (a). For all three complexes and all steps of degradation, the values of kinetics parameters obtained by Kissinger's and Ozawa's methods are in good agreement. The results obtained by Friedman's method showed that some decomposition steps are simple and some others are complex ones.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand",
volume = "102",
number = "1",
pages = "83-90",
doi = "10.1007/s10973-010-0748-2"
}

Šumar-Ristović, M., Minić, D. M., Poleti, D., Miodragović, Z., Miodragović Đenana U.,& Anđelković, K. K.. (2010). Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 102(1), 83-90.
https://doi.org/10.1007/s10973-010-0748-2

Šumar-Ristović M, Minić DM, Poleti D, Miodragović Z, Miodragović Đenana U., Anđelković KK. Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand. in Journal of Thermal Analysis and Calorimetry. 2010;102(1):83-90.
doi:10.1007/s10973-010-0748-2 .

Šumar-Ristović, Maja, Minić, Dragica M., Poleti, Dejan, Miodragović, Zoran, Miodragović Đenana U., Anđelković, Katarina K., "Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand" in Journal of Thermal Analysis and Calorimetry, 102, no. 1 (2010):83-90,
https://doi.org/10.1007/s10973-010-0748-2 . .

TY  - JOUR
AU  - Karanovic, Ljiljana
AU  - Poleti, Dejan
AU  - Balic-Zunic, Tonci
AU  - Makovicky, Emil
AU  - Gržetić, Ivan
PY  - 2008
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/937
AB  - Two new sulphosalts Tl(3)Ag(3)Sb(2)S(6), (1) and Tl(3)Ag(3)AS(2)S(6), (2) were prepared in reaction of synthetic binary sulfides: argentite (Ag(2)S), carlinite (Tl(2)S) and orpiment (As(2)O(3)) or stibnite (Sb(2)S(3)), and their crystal structures have been determined using single-crystal data. The compounds are isostructural and crystallize in the space group P2(1)/C (Z = 4), with a = 11.6854(17) angstrom, b = 11.8602(17) angstrom, c = 12.1294(18) angstrom, beta = 123.356(2)degrees, V = 1404.1(4) angstrom(3) for 1, and a = 11.4415(14) angstrom, b = 11.7530(15) angstrom, c = 11.9880(16) angstrom, beta = 123.516(3)degrees, V= 1344.0(3) angstrom(3) for2. Refinements involving anisotropic displacement parameters for all atoms converged to the conventional R-factors: R(1) = 0.0496 for 1 and R(1) = 0.0372 for 2. The structures consist of two kinds of slabs alternately situated along [1 0 0] direction and sharing S atoms located between them. The first slab is built up of Tl1S(8), Tl(2)S(6), Tl(3)S(5)Ag(3) coordination polyhedra and Ag(3)S(3)n(3) distorted trigonal pyramid (the average  lt  Ag(3)-S  gt  distance is 2.542 for 1 and 2.539 angstrom for 2) combined with trigonal Sb1S(3) or As1S(3) coordination pyramids ( lt  Sb1-S  gt  and  lt  As1-S  gt  are 2.438 and 2.259 angstrom, respectively). The thallium atom Tl1 is surrounded by eight S atoms forming a square anti-prism ( lt  Tl1-S  gt : 3.393 for 1 and 3.356 angstrom for 2), while the coordination polyhedron of Tl2 can be described as a significantly distorted trigonal prism or as an extremely distorted octahedron ( lt  Tl2-S  gt : 3.236 angstrom for 1 and 3.238 angstrom for 2). Thallium Tl3 is surrounded by six atoms (one Ag, four S at shorter and one S at longer distance), which form a distorted trigonal prism ( lt  Tl3-S  gt : 3.165 angstrom in 1 and 3.155 angstrom in 2). The second slab consists of trigonal Sb(2)S(3) or As(2)S(3) coordination pyramids combined with Ag1S(4) and Ag(2)S(4) coordination tetrahedra ( lt  Sb2-S  gt  and  lt  As2-S  gt  are 2.433 and 2.251 angstrom, respectively;  lt  Ag1-S  gt : 2.623 angstrom for 1 and 2.612 A for 2;  lt  Ag2-S  gt : 2.623 angstrom for 1 and 2.630 angstrom for 2). The most interesting feature of both structures is the existence of short Tl3-Ag(3) contacts of 2.959(2) angstrom in 1 and 2.922(1) angstrom in 2. These contacts are the shortest found so far and indicate very strong Tl-Ag interactions. They are discussed in terms of metallophilicity principle and relativistic effects. It is also pointed out that if only valence shell electrons are considered (Tl-Ag)(2+) group is isoelectronic with the (Hg-Hg)(2+) ion, therefore new examples of short Tl-Ag contacts could be expected. (C) 2007 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Two new examples of very short thallium-transition metal contacts: Tl(3)Ag(3)Sb(2)S(6) and Tl(3)Ag(3)As(2)S(6)
VL  - 457
IS  - 1-2
SP  - 66
EP  - 74
DO  - 10.1016/j.jallcom.2007.03.014
ER  - 

@article{
author = "Karanovic, Ljiljana and Poleti, Dejan and Balic-Zunic, Tonci and Makovicky, Emil and Gržetić, Ivan",
year = "2008",
abstract = "Two new sulphosalts Tl(3)Ag(3)Sb(2)S(6), (1) and Tl(3)Ag(3)AS(2)S(6), (2) were prepared in reaction of synthetic binary sulfides: argentite (Ag(2)S), carlinite (Tl(2)S) and orpiment (As(2)O(3)) or stibnite (Sb(2)S(3)), and their crystal structures have been determined using single-crystal data. The compounds are isostructural and crystallize in the space group P2(1)/C (Z = 4), with a = 11.6854(17) angstrom, b = 11.8602(17) angstrom, c = 12.1294(18) angstrom, beta = 123.356(2)degrees, V = 1404.1(4) angstrom(3) for 1, and a = 11.4415(14) angstrom, b = 11.7530(15) angstrom, c = 11.9880(16) angstrom, beta = 123.516(3)degrees, V= 1344.0(3) angstrom(3) for2. Refinements involving anisotropic displacement parameters for all atoms converged to the conventional R-factors: R(1) = 0.0496 for 1 and R(1) = 0.0372 for 2. The structures consist of two kinds of slabs alternately situated along [1 0 0] direction and sharing S atoms located between them. The first slab is built up of Tl1S(8), Tl(2)S(6), Tl(3)S(5)Ag(3) coordination polyhedra and Ag(3)S(3)n(3) distorted trigonal pyramid (the average  lt  Ag(3)-S  gt  distance is 2.542 for 1 and 2.539 angstrom for 2) combined with trigonal Sb1S(3) or As1S(3) coordination pyramids ( lt  Sb1-S  gt  and  lt  As1-S  gt  are 2.438 and 2.259 angstrom, respectively). The thallium atom Tl1 is surrounded by eight S atoms forming a square anti-prism ( lt  Tl1-S  gt : 3.393 for 1 and 3.356 angstrom for 2), while the coordination polyhedron of Tl2 can be described as a significantly distorted trigonal prism or as an extremely distorted octahedron ( lt  Tl2-S  gt : 3.236 angstrom for 1 and 3.238 angstrom for 2). Thallium Tl3 is surrounded by six atoms (one Ag, four S at shorter and one S at longer distance), which form a distorted trigonal prism ( lt  Tl3-S  gt : 3.165 angstrom in 1 and 3.155 angstrom in 2). The second slab consists of trigonal Sb(2)S(3) or As(2)S(3) coordination pyramids combined with Ag1S(4) and Ag(2)S(4) coordination tetrahedra ( lt  Sb2-S  gt  and  lt  As2-S  gt  are 2.433 and 2.251 angstrom, respectively;  lt  Ag1-S  gt : 2.623 angstrom for 1 and 2.612 A for 2;  lt  Ag2-S  gt : 2.623 angstrom for 1 and 2.630 angstrom for 2). The most interesting feature of both structures is the existence of short Tl3-Ag(3) contacts of 2.959(2) angstrom in 1 and 2.922(1) angstrom in 2. These contacts are the shortest found so far and indicate very strong Tl-Ag interactions. They are discussed in terms of metallophilicity principle and relativistic effects. It is also pointed out that if only valence shell electrons are considered (Tl-Ag)(2+) group is isoelectronic with the (Hg-Hg)(2+) ion, therefore new examples of short Tl-Ag contacts could be expected. (C) 2007 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Two new examples of very short thallium-transition metal contacts: Tl(3)Ag(3)Sb(2)S(6) and Tl(3)Ag(3)As(2)S(6)",
volume = "457",
number = "1-2",
pages = "66-74",
doi = "10.1016/j.jallcom.2007.03.014"
}

Karanovic, L., Poleti, D., Balic-Zunic, T., Makovicky, E.,& Gržetić, I.. (2008). Two new examples of very short thallium-transition metal contacts: Tl(3)Ag(3)Sb(2)S(6) and Tl(3)Ag(3)As(2)S(6). in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 457(1-2), 66-74.
https://doi.org/10.1016/j.jallcom.2007.03.014

Karanovic L, Poleti D, Balic-Zunic T, Makovicky E, Gržetić I. Two new examples of very short thallium-transition metal contacts: Tl(3)Ag(3)Sb(2)S(6) and Tl(3)Ag(3)As(2)S(6). in Journal of Alloys and Compounds. 2008;457(1-2):66-74.
doi:10.1016/j.jallcom.2007.03.014 .

Karanovic, Ljiljana, Poleti, Dejan, Balic-Zunic, Tonci, Makovicky, Emil, Gržetić, Ivan, "Two new examples of very short thallium-transition metal contacts: Tl(3)Ag(3)Sb(2)S(6) and Tl(3)Ag(3)As(2)S(6)" in Journal of Alloys and Compounds, 457, no. 1-2 (2008):66-74,
https://doi.org/10.1016/j.jallcom.2007.03.014 . .