Carbonyl­bis­{6,6′-[(3,3′-di-tert-butyl-5,5′-dimeth­oxy-1,1′-biphenyl-2,2′-di­yl)bis(oxy)]bis­(dibenzo[d,f][1,3,2]-dioxaphosphepine)}hydridorhodium(I) toluene-d (8) 2.25-solvate

The crystal-structure determination of the title compound, [RhH(C(46)H(44)O(8)P(2))(2)(CO)]·2.25C(7)D(8), is reported. The bis­phosphite ligand, C(46)H(44)O(8)P(2), is well known as Biphephos. One specific characteristic of this hydrido rhodium(I) monocarbonyl complex is that one bis­phosphite ligand is coordinated in the expected bidentate mode and the other is coordinated in a monodentate mode. Thus, one phosphite moiety remains non-coordinating. All three coordinating phospho­rus atoms occupy the equatorial positions in the trigonal–bipyramidal environment around the rhodium atom. The crystals of the hydrido rhodium(I) monocarbonyl complex contains deuterated solvent mol­ecules (toluene-d (8)). Most of them are included in the model, but the contributions of about 0.84 toluene per unit cell were removed from the diffraction data, using the SQUEEZE procedure in PLATON [Spek (2015 ▸). Acta Cryst. C71, 9–18]. [Image: see text]