Electron density manipulation in rhodium(I) phosphine complexes: structure of acetylacetonatocarbonylferrocenyl-diphenylphosphinerhodium(I)

摘要

The title complex [Rh(acac)(CO)(PPh(2)Fc)] (acac = acetylacetonato, PPh(2)Fc = ferrocenyldiphenylphosphine), was obtained in acetone by reaction of the tertiary phosphine with [Rh(acac)(CO)(2)] and was characterised by IR spectroscopy, H-1 and P-31 NMR and single crystal X-ray crystallography. This is a rare example illustrating the incorporation of the ferrocenyl moiety in a monodentate tertiary phosphine complex of rhodium(I). It crystallises in the triclinic space group P-I with two independent molecules in the asymmetric unit and refined to R = 2.40% from 5215 reflections. The independent molecules, showing the usual square planar geometry, differ mainly in the rotation mode of the asymmetric phosphine around the Rh-P bond and a slight deviation in the Rh-CO bond from linearity, which was correlated with IR data. (C) 1998 Elsevier Science Ltd. All rights reserved. [References: 15]