STRUCTURE OF CARBONYLBIS-(MU-3,5-DIMETHYLPYRAZOLYL)-BIS(4-TOLYL DIPHENYL-PHOSPHINITE)DIIRIDIUM(I)-DICHLOROMETHANE (1 1)/

In u-3,5-dimethylpyrazolyl-N:N')-bis[carbonyl(4-tolyl diphenylphosphin ite-P)iridium(I)] dichloromethane solvate, two Ir(I) atoms are joined by two 3,5-dimethylpyrazolyl bridges with one carbonyl and one 4-tolyl diphenylphosphinite ligand completing the square-planar geometry abou t each Ir atom. The Ir...Ir distance of 3.307 (1) angstrom is greater than the distance of 3.22 angstrom found in a similar pyrazolyl-bridge d iridium(I) dimer [Fox (1989). PhD dissertation, California Institute of Technology, USA].