Rhodium(I), Palladium(II), and Platinum(II) Complexes Containing New Mixed Phosphane−Phosphite Ligands − Effect of the Catalytic System Stability on the Enantioselective Hydroformylation of Styrene
✍ Scribed by Carmela G. Arena; Felice Faraone; Claudia Graiff; Antonio Tiripicchio
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 297 KB
- Volume
- 2002
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
The new mixed phosphane-phosphite ligands 1 and 2, derived from 3,3Ј-di-tert-butyl-2,2Ј-dihydroxy-5,5Ј-dimethoxybiphenyl and (S)-binaphthol, respectively, reacted with [Rh(COD)(THF) 2 ]CF 3 SO 3 to give the compounds [Rh(COD)(1)]CF 3 SO 3 and [Rh(COD)(2)]CF 3 SO 3 in which the ligands 1 and (S)-2 are chelated to the rhodium centre. The reaction with [Rh(CO) 2 Cl] 2 gave two different products, [Rh(CO) 2 (L)Cl] and [Rh(CO)(L)Cl] [L = 1 and (S)-2], containing L as a chelate. On the basis of the IR and NMR spectroscopic data, the proposed structure of the pentacoordinate species is a trigonal bipyramide in which the