1.
Angew Chem Int Ed Engl
; 56(22): 6236-6240, 2017 05 22.
Article
in English
| MEDLINE
| ID: mdl-28071846
ABSTRACT
Four-membered rings with a P2 Ch2 core (Ch=S, Se) and phosphorus in the +3 oxidation state have been synthesized. The utility of these rings as a source of monomeric phosphinidene chalcogenides was probed by the addition of an N-heterocyclic carbene, resulting in a base-stabilized phosphinidene sulfide. Similarly, persistence of the phosphinidene selenide in solution was shown through cycloaddition chemistry with 2,3-dimethylbutadiene at elevated temperatures. The observed reactivity was explained by detailed computational work that established the conditions upon which the P2 Ch2 rings can liberate phosphinidene chalcogenides.