Synthesis and Properties of Chiral Ruthenium Complexes ContainingO-,S- andP-Functionalized Cp-Ligands

Autor: Chris Mattheis, Jhonny Jimenez, Christoph Wagner, Adolphus A. H. van der Zeijden, Kurt Merzweiler
Rok vydání: 1999
Předmět:
Zdroj: European Journal of Inorganic Chemistry. 1999:1919-1930
ISSN: 1099-0682
1434-1948
DOI: 10.1002/(sici)1099-0682(199911)1999:11<1919::aid-ejic1919>3.0.co;2-6
Popis: Novel, functionalized, chiral Cp-ligands with S- and P-donor atoms were designed. Together with known analogues containing ether side-chains they were complexed to ruthenium for use as chiral Lewis-acid catalysts. In the ether complexes [RuCl(η5-C5H4CH2CH2OR)(PPh3)2] {R = Me, (1S)-isobornyl, (1R)-menthyl, (1R)-fenchyl} the Cp-ligand is only η5-coordinated; all attempts to provoke a bidentate, Cp/O coordination were unsuccessful. The sulfide complex [Ru{η5:η1-C5H4CH2CH2S[(1R)-neomenthyl]}(PPh3)2][OTf] contains a bidentate Cp/S-coordinated ligand, but it is unstable. The stable phosphane complex [RuCl(η5:η1-C5H4CH2CH(Me)PPh2)(PPh3)] exists as a 77:23 mixture of diastereomers containing a strongly bidentate Cp/P ligand. The diastereomers interchange, with Ru–Cl bond cleavage as the rate-determining step.
Databáze: OpenAIRE
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