MATO-N,N')(ETHYL)-(TRIPHENYLPHOSPHINE)RHODIUM(III)

The structure of [Rh(C4H7N2O2)(2)(C2H5)(C18H15P)] consists of discrete complex molecules in which the Rh atom displays distorted octahedral coordination; the two dimethylglyoxime ligands lie in the equatorial p lane and the ethyl and triphenylphosphine groups occupy the axial posi tions. The Rh atom is displaced by 0.130 (1) Angstrom from the mean pl ane through the four oxime N donor atoms in the direction of the P ato m. The Rh-N distances range from 1.903 (6) to 1.993 (6) Angstrom, whil e the axial Rh-P and Rh-C distances are 2.461 (2) and 2.064 (7) Angstr om, respectively. Comparison of the results with those obtained previo usly for analogous compounds containing the axial fragment Ph(3)P-Rh-X indicates that the trans influence of X is determined by its sigma-do nor power.