Electronic structures of RN(PX 2) 2 (RCH 3 or C 6H 5; XCl, OCH 3 or OC 6H 5) ligands: an ultraviolet photoelectron spectroscopic study

Abstract

Vapour phase HeI photoelectron spectra of the diphosphazane ligands RN (PX 2) 2 (RCH 3 or C 6H 5, XCl, OCH 3 or OC 6H 5) are presented along with the assignments of bands on the basis of molecular orbital calculations. The spectra are in accordance with the structural studies which indicate multiple bonding in the PNP segment. The phosphorus lone pair ionization energy appears to follow the σ donor ability of the ligands.