Crystal structure of bromo[tris(2-vinylphenyl)phosphine]rhodium(I)

Abstract

The crystal structure of the title compound has been determined from 579 independent observed diffractometer reflections. Z= 6 in a rhombohedral cell (hexagonal axes) having a= 13·636(3), c= 19·506(4)Å, and space group R3c.

Full-matrix refinement with anisotropic temperature factors for all atoms (except hydrogen) reduced R to 0·066. The co-ordination about the rhodium is a trigonal bipyramid with the centres of the three olefin bonds, CC 1·48(3)Å, defining the equatorial plane. The rhodium, phosphorus, and bromine atoms lie on a three-fold axis which relates the vinylphenyl groups. The six olefinic carbon atoms are equidistant from the rhodium atom (Rh–C 2·22 and 2·25 Å) which is displaced from the equatorial plane by 0·10 Å towards the bromine, to give Rh–Br 2·581 (4) and Rh–2·167(11)Å.