THE STRUCTURE OF TITANIUM-RHODIUM HETEROBINUCLEAR COMPLEXES WITH MU-PHENYL LIGANDS

Abstract

The heteronuclear mu-methylene mu-phenyl complexes Cp2Ti(mu-CH2)[mu-p-(CH3)2NC6H4]Rh(1,5-COD) (3b) (1,5-COD = 1,5-cyclooctadiene) and Cp2Ti(mu-CH2)(mu-o-MeOC6H4)RH((1,5-COD) (3c) were synthesized from Cp2Ti(mu-CH2)(mu-Cl)Rh(1,5-COD) (1) and the appropriate aromatic lithium reagent. The structure of 3b was determined by single-crystal X-ray crystallography. The two metal atoms are bridged by the mu-methylene carbon remaining from 1 and by ipso carbon of the p-(N,N-dimethylamino)phenyl group. Compound 3b crystallizes in the triclinic system, in space group P1 (No. 2), with a = 8.988 (1)-angstrom, b = 10.169 (1) angstrom, c = 13.707 (2) angstrom, alpha- = 102.85 (1)-degrees, beta = 103.47 (1)-degrees, gamma = 101.36 (1)-degrees, V = 1146.2 (2) angstrom-3, and Z = 2. The structure was solved and refined with a final R = 0.0370 by using 3882 independent reflections. Complex 3c was shown to have a similar structure by spectroscopic comparison to 3b.