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 . .