TY  - JOUR
AU  - Đukić, Jean-Pierre
AU  - Boulho, Cedric
AU  - Sredojević, Dušan N.
AU  - Scheeren, Carla
AU  - Zarić, Snežana D.
AU  - Ricard, Louis
AU  - Pfeffer, Michel
PY  - 2009
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1027
AB  - The stereospecificity of ligand exchange at the Ir-III centre of a cycloiridium arenetricarbonylchromium complex has been established experimentally by various analytical methods as well as by X-ray diffraction structural analysis and computational investigations. Two new cases of phenyl and methyl iridium(III) complexes have been prepared by reaction of (S-p*,R-Ir*)- chlorido(2-[(tricarbonyl)(eta(6)-phenylene-kappa C-1)chromium(0)]pyridine-kappa N) (pentamethylcyclopentadienyl)iridium(III) with PhMgBr and MeMgBr. The determining influence of electrostatic repulsion has been established by means of density functional theory at the Becke-Perdew/TZP(ZORA) level by using, among other means, energy partitioning analysis. It is also shown that the Cr(CO)(3) fragment is likely to ease the ionic cleavage of the Ir-Cl bond in chlorido cycloiridium tricarbonylchromium complexes in a way similar to that already established for the solvolysis of benzyl halide complexes, that is, through a direct interaction of the CP centre with the cationic Ir-III centre.
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Chemistry. A European Journal
T1  - The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes
VL  - 15
IS  - 41
SP  - 10830
EP  - 10842
DO  - 10.1002/chem.200901344
ER  - 

@article{
author = "Đukić, Jean-Pierre and Boulho, Cedric and Sredojević, Dušan N. and Scheeren, Carla and Zarić, Snežana D. and Ricard, Louis and Pfeffer, Michel",
year = "2009",
abstract = "The stereospecificity of ligand exchange at the Ir-III centre of a cycloiridium arenetricarbonylchromium complex has been established experimentally by various analytical methods as well as by X-ray diffraction structural analysis and computational investigations. Two new cases of phenyl and methyl iridium(III) complexes have been prepared by reaction of (S-p*,R-Ir*)- chlorido(2-[(tricarbonyl)(eta(6)-phenylene-kappa C-1)chromium(0)]pyridine-kappa N) (pentamethylcyclopentadienyl)iridium(III) with PhMgBr and MeMgBr. The determining influence of electrostatic repulsion has been established by means of density functional theory at the Becke-Perdew/TZP(ZORA) level by using, among other means, energy partitioning analysis. It is also shown that the Cr(CO)(3) fragment is likely to ease the ionic cleavage of the Ir-Cl bond in chlorido cycloiridium tricarbonylchromium complexes in a way similar to that already established for the solvolysis of benzyl halide complexes, that is, through a direct interaction of the CP centre with the cationic Ir-III centre.",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Chemistry. A European Journal",
title = "The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes",
volume = "15",
number = "41",
pages = "10830-10842",
doi = "10.1002/chem.200901344"
}

Đukić, J., Boulho, C., Sredojević, D. N., Scheeren, C., Zarić, S. D., Ricard, L.,& Pfeffer, M.. (2009). The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes. in Chemistry. A European Journal
Wiley-V C H Verlag Gmbh, Weinheim., 15(41), 10830-10842.
https://doi.org/10.1002/chem.200901344

Đukić J, Boulho C, Sredojević DN, Scheeren C, Zarić SD, Ricard L, Pfeffer M. The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes. in Chemistry. A European Journal. 2009;15(41):10830-10842.
doi:10.1002/chem.200901344 .

Đukić, Jean-Pierre, Boulho, Cedric, Sredojević, Dušan N., Scheeren, Carla, Zarić, Snežana D., Ricard, Louis, Pfeffer, Michel, "The Stereospecific Ligand Exchange at a Pseudo-Benzylic T-4 Iridium Centre in Planar-Chiral Cycloiridium (eta(6)-Arene)tricarbonylchromium Complexes" in Chemistry. A European Journal, 15, no. 41 (2009):10830-10842,
https://doi.org/10.1002/chem.200901344 . .

TY  - JOUR
AU  - Scheeren, Carla
AU  - Maasarani, Fida
AU  - Hijazi, Akram
AU  - Đukić, Jean-Pierre
AU  - Pfeffer, Michel
AU  - Zarić, Snežana D.
AU  - Le Goff, Xavier-Frederic
AU  - Ricard, Louis
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/843
AB  - The reactivity of a set of prototypical (eta(6)-arene)tricarbonylchromium complexes bearing amino, oxazolyl, and pyridyl ancillary ligands versus [Cp*RhCl2](2) and [Cp*IrCl2](2) has been investigated. Successful cyclometalation reactions were achieved essentially in the presence of hydrated sodium acetate with planar-prochiral 2-phenylpyridine and 3-methyl-2-phenylpyridine complexes with yields ranging from 60% to 92%. The most salient feature of the reported reactions is their stereoselectivity, as the only diastereomers to be produced are those with the Rh- and Ir-bound chloro ligand located trans with respect to the Cr(CO)(3). According to X-ray diffraction analyses, a relative rac-(pR,T-4-S) configuration may be assigned to the complexes: the Cp* ligand sits unexpectedly syn with respect to the tricarbonylmetal moiety. Introduction of the Cr(CO)(3) moiety by treatment of cycloiridated 2-phenylpyridine with tricarbonyl(eta(6)-naphthalene)chromium resulted in a unique diastereomer of the same relative configuration. Quantum calculations using the density functional theory were carried out on models of syn and trans-chloro isomers. Owing to strong electrostatic repulsion between the chloro ligand and the Cr(CO)(3) moiety, the syn-chloro isomers were found less stable by 7-8 kcal/mol than the trans counterparts, suggesting that cyclorhodation and cycloiridation reactions are thermodynamically controlled.
PB  - Amer Chemical Soc, Washington
T2  - Organometallics
T1  - Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2)
VL  - 26
IS  - 14
SP  - 3336
EP  - 3345
DO  - 10.1021/om070170l
ER  - 

@article{
author = "Scheeren, Carla and Maasarani, Fida and Hijazi, Akram and Đukić, Jean-Pierre and Pfeffer, Michel and Zarić, Snežana D. and Le Goff, Xavier-Frederic and Ricard, Louis",
year = "2007",
abstract = "The reactivity of a set of prototypical (eta(6)-arene)tricarbonylchromium complexes bearing amino, oxazolyl, and pyridyl ancillary ligands versus [Cp*RhCl2](2) and [Cp*IrCl2](2) has been investigated. Successful cyclometalation reactions were achieved essentially in the presence of hydrated sodium acetate with planar-prochiral 2-phenylpyridine and 3-methyl-2-phenylpyridine complexes with yields ranging from 60% to 92%. The most salient feature of the reported reactions is their stereoselectivity, as the only diastereomers to be produced are those with the Rh- and Ir-bound chloro ligand located trans with respect to the Cr(CO)(3). According to X-ray diffraction analyses, a relative rac-(pR,T-4-S) configuration may be assigned to the complexes: the Cp* ligand sits unexpectedly syn with respect to the tricarbonylmetal moiety. Introduction of the Cr(CO)(3) moiety by treatment of cycloiridated 2-phenylpyridine with tricarbonyl(eta(6)-naphthalene)chromium resulted in a unique diastereomer of the same relative configuration. Quantum calculations using the density functional theory were carried out on models of syn and trans-chloro isomers. Owing to strong electrostatic repulsion between the chloro ligand and the Cr(CO)(3) moiety, the syn-chloro isomers were found less stable by 7-8 kcal/mol than the trans counterparts, suggesting that cyclorhodation and cycloiridation reactions are thermodynamically controlled.",
publisher = "Amer Chemical Soc, Washington",
journal = "Organometallics",
title = "Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2)",
volume = "26",
number = "14",
pages = "3336-3345",
doi = "10.1021/om070170l"
}

Scheeren, C., Maasarani, F., Hijazi, A., Đukić, J., Pfeffer, M., Zarić, S. D., Le Goff, X.,& Ricard, L.. (2007). Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2). in Organometallics
Amer Chemical Soc, Washington., 26(14), 3336-3345.
https://doi.org/10.1021/om070170l

Scheeren C, Maasarani F, Hijazi A, Đukić J, Pfeffer M, Zarić SD, Le Goff X, Ricard L. Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2). in Organometallics. 2007;26(14):3336-3345.
doi:10.1021/om070170l .

Scheeren, Carla, Maasarani, Fida, Hijazi, Akram, Đukić, Jean-Pierre, Pfeffer, Michel, Zarić, Snežana D., Le Goff, Xavier-Frederic, Ricard, Louis, "Stereoselective "electrophilic" cyclometalation of planar-prochiral (eta(6)-arene)tricarbonylchromium complexes with asymmetric metal centers: pseudo-T-4 [Cp*RhCl2](2) and [Cp*IrCl2](2)" in Organometallics, 26, no. 14 (2007):3336-3345,
https://doi.org/10.1021/om070170l . .