A. Mernyi, C. Kratky, W. Weissensteiner
Feb 8, 1996
Citations
0
Influential Citations
32
Citations
Journal
Journal of Organometallic Chemistry
Abstract
The palladium dichloride complex of (Sc, Sm)-1-(diphenylphosphino)-2,1′-[(1-N,N-dimethylamino)-1,3-propanediyl]-ferrocene (5—PdCl2) has been prepared from enantiopure (S)-1,1′-[(1-N,N-dimethylamino)-1,3-propanediyl]-ferrocene (4) via a highly stereoselective ortho-lithiation followed by reaction with chlorodiphenyl phosphine to give amino phosphine 5, which on treatment with (Ch3CN)2PdCl2 gave the complex 5—PdCl2. Tha absolute configuration of the (-)589-enantiomer of 4 was deduced from the X-ray structure of its tartrate confirming (S)-configuration at the stereogenic center. A conformational analysis including X-ray structure analysis of 5 and 5—PdCl2 as well as empirical force field calculations on 4 and 5 together with NMR data shows strong stereochemical similarities of 5 and 5—PdCl2 with the widely used ligand PPFA and its palladium dichloride complex PPFA-PdCl2.