PHOTOELECTRON-SPECTROSCOPY OF PHENYLDIHALOPHOSPHITES

In order to explain the reactivity of aryldihalophosphites towards hal ophosphonium salts, photoelectron spectra of PhOPX(2) (X=F, Cl) were s tudied. Electron densities of boundary molecular orbitals (MO) for the se compounds were calculated using the MNDO method and analyzed. Repla cement of F by Cl was shown to substantially affect the sigma orbital. When X=Cl, this MO embraces the whole of the OPX(2) moiety whereas fo r X=F it is localized on the P-O bond.