Effect of mutual attraction of aromatic ligands on bond angles in metal complexes: structures of dibromotris-(5-alkyl-5H-dibenzophosphole)-palladium(II)[or platinum(II)] compounds

Abstract

In compounds ML₃X₂(M = Ni, Pd, Pt; L = 5-alkyl-5H-dibenzophosphole) two only of the ligands L have their aromatic ring systems parallel plane-to-plane, close and geometrically overlapping; in six such molecules, of varied stereochemistry, an attraction between the two ligands is shown by their P–M–P angles which are less than the corresponding angles for non-parallel ligand pairs.