Modeling the direct activation of dihydrogen by a P2C2 cyclic biradical: formation of a cyclic bis(P-H lambda(5)-phosphorane)

Inorg Chem. 2009 Sep 7;48(17):8063-5. doi: 10.1021/ic901072z.

Abstract

The synthesis of a remarkable cyclic bis(P-H lambda(5)-phosphorane) is reported. A stable phosphorus-heterocyclic biradical, 1,3-diphosphacyclobutane-2,4-diyl, sequentially accepts negatively and positively charged hydrogen atoms to afford 2,4-diphospha-1,3-cyclobutadiene with a diylidic structure containing two P-H bonds.