title: Modeling the direct activation of dihydrogen by a P2C2 cyclic biradical: formation of a cyclic bis(P-H lambda(5)-phosphorane).
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.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan. ito.s.ao@m.titech.ac.jp
authors.forename: Shigekazu
authors.initials: S
authors.lastname: Ito
authors.forename: Joji
authors.initials: J
authors.lastname: Miura
authors.forename: Noboru
authors.initials: N
authors.lastname: Morita
authors.forename: Masaaki
authors.initials: M
authors.lastname: Yoshifuji
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Arduengo