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Syntheses of Nonracemic Ortho-Mercurated and Ortho-Ruthenated Complexes of 2-[Tricarbonyl(η6-phenyl)chromium]pyridine

Djukic, Jean-Pierre
Berger, Alexsandro
Pfeffer, Michel
de Cian, André
Kyritsakas-Gruber, Nathalie
Published in Organometallics. 2004, vol. 23, no. 24, p. 5757-5767
Abstract The reaction of racemic orthomercurated (η6-arene)tricarbonylchromium complexes with bis[(?6-cymene)ruthenium(II)dichloride] affords the corresponding dinuclear (Cr,Ru) products with moderate yields, which have been satisfactorily characterized by X-ray diffraction analysis. The synthesis of nonracemic orthomercurated (η6-arene)tricarbonylchromium complexes has been attempted starting from enantio-enriched homo- and heteroleptic Pd(II) bischelated complexes. Both enantiomers of ortho-mercurated 2-[tricarbonyl(?6-phenyl)chromium]pyridine have been synthesized by reaction of a heteroleptic Pd(II) bischelated with HgCl2. The two mercury(II) complexes were also submitted to a transmetalation reaction with bis[(?6-cymene)ruthenium(II)dichloride] and yielded the corresponding nonracemic (Cr, Ru) products, with enantiomeric excesses ranging from 82 to 89% as suggested by 1H NMR analyses in the presence of BINPHAT anion.
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DJUKIC, Jean-Pierre et al. Syntheses of Nonracemic Ortho-Mercurated and Ortho-Ruthenated Complexes of 2-[Tricarbonyl(η6-phenyl)chromium]pyridine. In: Organometallics, 2004, vol. 23, n° 24, p. 5757-5767. doi: 10.1021/om0494667 https://archive-ouverte.unige.ch/unige:6945

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Deposited on : 2010-06-18

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