Multicomponent Synthesis of Poly(α-aminophosphine chalcogenide)s and Subsequent Depolymerization

Jan-Willem Lamberink-Ilupeju; Mathew J Willans; Joe B Gilroy; James J Noël; Johanna M Blacquiere; Paul J Ragogna

doi:10.1021/acs.inorgchem.3c02039

Multicomponent Synthesis of Poly(α-aminophosphine chalcogenide)s and Subsequent Depolymerization

Inorg Chem. 2023 Sep 18;62(37):15104-15109. doi: 10.1021/acs.inorgchem.3c02039. Epub 2023 Sep 7.

Authors

Jan-Willem Lamberink-Ilupeju¹, Mathew J Willans¹, Joe B Gilroy¹, James J Noël^{1

2}, Johanna M Blacquiere¹, Paul J Ragogna^{1

2}

Affiliations

¹ Department of Chemistry, The University of Western Ontario, London, Ontario N6A 587, Canada.
² Surface Science Western, The University of Western Ontario, London, Ontario N6G 0J3, Canada.

PMID: 37678149
DOI: 10.1021/acs.inorgchem.3c02039

Abstract

Multicomponent reactions of primary phosphines (R-PH₂), diimines (R'-N═C(H)-R-(H)C═N-R'), and chalcogens (O₂, S₈) generate poly(α-aminophosphine chalcogenide)s (4-7) through step-growth polymerization. Characterization of the linear polymers using ³¹P{¹H} diffusion-ordered NMR spectroscopy (DOSY) experiments aided in determining the molecular weight (M_w) of the material. Subjecting the polyphosphine oxide or sulfide to reducing conditions in the presence of a Lewis acid resulted in complete depolymerization of the polymers, quantitatively releasing the 1° phosphine and diimine (2) starting materials, with concomitant reduction of diimine to diamine (9).