Four-membered rings with a P Ch 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 P Ch rings can liberate phosphinidene chalcogenides.
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Article Synopsis
- The study investigates the reactivity of 4-membered rings containing phosphorus in the +3 oxidation state, specifically with chalcogens like sulfur and selenium.
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