STUDY OF THE ELECTRONIC-STRUCTURE OF 2-(DIALKYLAMINO)-1,3-DIMETHYL-1,3,2-DIAZAPHOSPHOLANES AND RELATED MOLECULES

Ultraviolet photoelectron spectroscopy has been employed to study the electronic structure of several diazaphospholanes and related molecules. These molecules contain two nitrogen lone-pair basis orbitals oriented such that their interaction with the phosphorus lone-pair basis orbital is of π type. The third nitrogen lone-pair basis orbital (exocyclic nitrogen) is orthogonal to the other three. A series of interaction parameters have been derived to assist in PES band assignments which are consistent with dynamic NMR data and PES of acyclic aminophosphines studied earlier in these laboratories and elsewhere. The current data suggest that the HOMO for the (dialkylamino)diazaphospholanes has partial phosphorus lone-pair character in contrast to the HOMO for the acyclic aminophosphines which has only nitrogen lone-pair character. © 1979, American Chemical Society. All rights reserved.