Abstract
Ortho-metalated derivatives of the optically active ligand (S)-(-)-N,N-dimethyl(1-phenylethyl)amine (LL*-H) react with [(eta(6)-p-cymene)MCl2](2) (M = Ru, Os) to give the half-sandwich complexes [(eta(6)-p-cymene)Ru(LL*)Cl] (1a,b) and [(eta(6)-p-cymene)Os(LL*)Cl] (2a,b). In both cases two diastereomers (R-M,S-C) and (S-M,S-C) arise differing only in the metal configuration. On crystallization the ...
Abstract
Ortho-metalated derivatives of the optically active ligand (S)-(-)-N,N-dimethyl(1-phenylethyl)amine (LL*-H) react with [(eta(6)-p-cymene)MCl2](2) (M = Ru, Os) to give the half-sandwich complexes [(eta(6)-p-cymene)Ru(LL*)Cl] (1a,b) and [(eta(6)-p-cymene)Os(LL*)Cl] (2a,b). In both cases two diastereomers (R-M,S-C) and (S-M,S-C) arise differing only in the metal configuration. On crystallization the (R-M,S-C)-isomers of both complexes 1 and 2 were obtained diastereomerically pure. The absolute configurations were established by X-ray structure analyses. Epimerization studies clearly showed that the metal configuration in both complexes is labile in solution. (C) 2003 Elsevier Science Ltd. All rights reserved.
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