Crystal structure of dichlorido[2-(1H-imidazol-2-yl-κN3)imidazolato-κN]bis(tri-n-butylphosphane-κP)rhodium(III)

Abstract

In the title compound, [Rh(C6H5N4)Cl2(C12H27P)2], the RhIII ion is chelated by the singly deprotonated 2,2′-biimidazolate (Hbim−) ligand and coordinated by two chloride ions and two tri-n-butylphosphane ligands. The chloride ions and N atoms of the Hbim− ligand lie in a plane where the sum of X—Rh—X angles between cis sites is 360°. The phosphane ligands occupy the sites perpendicular to the plane, completing the overall distorted octahedral coordination sphere. The complex forms a self-complementary hydrogen-bonded dimer with the inversion-related complex through N—H...N hydrogen bonds.

Keywords

• crystal structure
• hydrogen bonding
• biimidazole
• rhodium complex