N. C. Payne, D. Stephan
Dec 1, 1981
Citations
0
Influential Citations
12
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Diastereomeric Pt complexes of formula [Pt(P-P)CH 3 (P ★ )]ClO 4 , where P-P is bis(diphenylphosphino)ethane or a chiral bidentate phosphine, one of 2 S -3 S -bis((diphenylphosphino)butane, (+)-2-3- O -isopropylidene-2,3-dihydroxy-1,4-bis(diphenylphosphino)butane, S-N,N -bis(diphenylphosphino)-1-phenylethylamine and S-N,N -bis((diphenylphosphino)alanine ethyl ester, and P ★ is a chiral monodentate phosphine of formula PC 6 H 5 R′R″, have been prepared. In the presence of an excess of the racemic modification of the monodentate ligand, varying degrees of stereoselective binding to the metal complex containing the chiral chelate ligand were observed. A partial resolution of several chiral monophosphines was thus achieved in situ, monitored by 31 P NMR and optical rotary dispersion spectra. The configuration of the preferentially bound enantiomer was investigated using single crystal X-ray techniques, and identified by optical rotary dispersion spectra. The factors affecting the degree and nature of the enantioselectivity are discussed.