Crystal structures of bis­[2-(pyridin-2-yl)phenyl-κ2 N,C 1]rhodium(III) complexes containing an aceto­nitrile or monodentate thyminate(1−) ligand

The crystal structures of bis-[2-(pyridin-2-yl)phen-yl]rhodium(III) complexes with the metal in an octahedral coordination containing chloride and aceto-nitrile ligands, namely (OC-6-42)-aceto-nitrile-chlorido-bis-[2-(pyridin-2-yl)phenyl-κ(2) N,C (1)]rhodium(III), [RhCl(C11H8N)2(CH3CN)] (1), thyminate(1-) and methanol, namely (OC-6-42)-methanol(5-methyl-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-1-ido-κN (1))bis-[2-(pyridin-2-yl)phenyl-κ(2) N,C (1)]rhodium(III), [Rh(C11H8N)2(C5H5N2O2)(CH3OH)]·CH3OH·0.5H2O (2), and thy-min-ate(1-) and ethanol, namely (OC-6-42)-ethanol(5-methyl-2,4-dioxo-1,2,3,4-tetra-hydro-pyrimidin-1-ido-κN (1))bis[2-(pyridin-2-yl)phenyl-κ(2) N,C (1)]rhodium(III), [Rh(C11H8N)2(C5H5N2O2)(C2H5OH)]·C2H5OH (3), are reported. The aceto-nitrile complex, 1, is isostructural with the Ir(III) analog. In complexes 2 and 3, the monodeprotonated thyminate (Hthym(-)) ligand coordinates to the Rh(III) atom through the N atom, and the resulting Rh-N(Hthym) bond lengths are relatively long [2.261 (2) and 2.252 (2) Å for 2 and 3, respectively] as compared to the Rh-N bonds in the related thyminate complexes. In each of the crystals of 2 and 3, the complexes are linked via a pair of inter-molecular N-H⋯O hydrogen bonds between neighbouring Hthym(-) ligands, forming an inversion dimer. A strong intra-molecular O-H⋯O hydrogen bond between the thyminate(1-) and alcohol ligands in mutually cis positions to each other is also observed.