31P-NMR, 77Se-NMR and mass spectral studies on some tricoordinate P(III)-N and tetracoordinate P(V)-N systems

Abstract

A series of aminophosphines were prepared by controlled condensation reaction between PCl₃ or PhPCl₂ and amines, and they were converted into the corresponding chalcogenides. ³¹P-NMR and mass spectral data were collected for characterization of these asymmetrically substituted phosphines, and in addition, ⁷⁷Se- NMR data were collected for the phosphine selenides prepared. The spectral data revealed the importance of the dipolar structure for the heavier chalcogen atoms and the π-bond structure for the lighter ones. This study has also brought out the first examples of chiral tris(amino)phosphines and the corresponding selenides.

KEY WORDS: Aminophosphines, Dichlorophenylphosphine, Chiral tris(amino)phosphines, Aminophosphine chalcogenides, ⁷⁷Se-NMR
Bull. Chem. Soc. Ethiop. 2006, 20(2), 207-218.