Diphenyl[2-(2-pyridylaminomethyl)phenyl]phosphine oxide

Abstract

The title compound, C24H21N2OP, was obtained by reacting 2-aminopyridine and 2-(diphenylphosphinyl)benzaldehyde in ethanol. It crystallizes with two crystallographically independent molecules in the asymmetric unit. The aminopyridine units and the benzene ring bonded to the phosphine oxide P atom form dihedral angles of 88.58 (7) and 82.47 (9)° in the two molecules. The crystal structure displays strong N—H...O and weak C—H...O hydrogen bonds along the b axis and C—H...π aromatic intra- and intermolecular interactions.