Tris(N-{bis[methyl(phenyl)amino]phosphoryl}benzenesulfonamidato-κ2O,O′)(1,10-phenanthroline-κ2N,N′)lanthanum(III)

Abstract

The asymmetric unit of [La(C20H21N3O3PS)3(C12H8N2)] is created by one LaIIIion, three deprotonatedN-{bis[methyl(phenyl)amino]phosphoryl}benzenesulfonamidate (L−) ligands and one 1,10-phenanthroline (Phen) molecule. Each LaIIIion is eight-coordinated (6O+2N) by three phosphoryl O atoms, three sulfonyl O atoms of threeL−ligands and two N atoms of the chelating Phen ligand, leading to the formation of six- and five-membered metallacycles, respectively. The lanthanum coordination polyhedron has a bicapped trigonal–prismatic geometry. `Sandwich-like' intramolecular π–π stacking interactions are observed between the 1,10-phenanthroline ligand and two benzene rings of two differentL−ligands. The phenyl rings ofL−that are not involved in the stacking interactions show minor positional disorder. Molecules form layers parallel to the (010) plane due to weak C—H...O intermolecular hydrogen bonds. Unidentified highly disordered solvate molecules that occupyca400 Å3large voids have been omitted from the refinement model.