tert-Butylbis(dimethylglyoximato-N,N')(triphenylphosphine-P)rhodium

The title structure {bis­[2,3-butanedione dioximato(1-)-N,N'](tert-butyl) (triphenylphosphine-P)rhodium, [Rh(C₄H₇N₂O₂)₂(C₄H₉)(C₁₈H₁₅P)]} consists of discrete complexes in which the Rh atom displays a distorted octahedral coordination, where the two dimethylglyoxime ligands lie in the equatorial plane and the tert-butyl and triphenylphosphine groups occupy the axial positions. The Rh atom is displaced by 0.048 (1) Å from the mean plane through the four oxime N donor atoms towards the P atom. The Rh—N distances range from 1.930 (3) to 1.982 (2) Å, while the axial Rh—P and Rh—C distances are 2.492 (1) and 2.216 (3) Å, respectively. Comparison of the results with those obtained previously for other compounds of this type indicates that the trans influence of R in the axial fragment Ph₃P—Rh—R is determined by its σ-donor power, while the Rh—C bond distance depends on the steric interaction of R with the equatorial moiety.

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