)PHENYLACETYLIDO)-(TRIPHENYLPHOSPHINE)RHODIUM(III) DICHLOROMETHANE, [RH(C4H7N2O2)2-(C8H5)(C18H15P)].CH2CL2

The title structure {alternative name: bis[2,3-butanedial dioximato(1 ](phenylethynyl)(triphenylphosphine-P)rhodium(III) dichloromethane sol vate} consists of discrete complexes [Rh(dmgH)2(PPh3)R] (R = C=CPh and dmgH = dimethylglyoximato, C4H7N2O2-) in which the Rh atom displays d istorted octahedral coordination with the two dimethylglyoximato ligan ds in the equatorial plane and the phenylacetylide and triphenylphosph ine groups in axial positions. The Rh atom is displaced by 0.073 (1) a ngstrom from the mean plane through the four oxime N-atom donors. The average Rh-N distance is 1.971 (2) angstrom, while the axial Rh-P and Rh-C distances are 2.409 (1) and 1.991 (3) angstrom, respectively. Com parison of the results with those obtained previously for the ethyl an d vinyl analogues (R = Et, CH = CH2) indicates a lower trans influence of the phenylacetylide ligand in the P - Rh - C fragment, in accordan ce with its sp-hybridized C atom.