AN UNUSUAL HETEROBIMETALLIC COMPOUND WITH A RHODIUM(I)-ETA-4-ARENE INTERACTION

The synthesis, structure, and spectroscopic properties of the unusual heterobimetallic complex [(cod)RhCo(TMPP-O)2][BF4]2 (1) are described (cod = 1,5-cyclooctadiene; TMPP = tris(2,4,6-trimethoxyphenyl)phosphine; TMPP-O = [P(C6H2(OMe)3)2-(C6H2(OMe)2O)]-). The structure of 1 consists of a six-coordinate Co(III) center in which the phenoxide oxygens are in a trans disposition, with a Rh(I) center being coordinated to the diene molecule in two cis positions and in an eta4 bonding mode to one of the demethylated phenyl rings of the TMPP ligand.