Tris(<i>N</i>-{bis[methyl(phenyl)amino]phosphoryl}benzenesulfonamidato-κ<sup>2</sup><i>O</i>,<i>O</i>′)(1,10-phenanthroline-κ<sup>2</sup><i>N</i>,<i>N</i>′)lanthanum(III)
Acta crystallographica. Section E, Crystallographic communications