"Shigekazu Ito,Joji Miura,Morita,Masaaki Yoshifuji,Anthony J. Arduengo, III","Modeling the Direct Activation of Dihydrogen by a P2C2 Cyclic Biradical: Formation of a Cyclic Bis(P?H ă5-phosphorane)",,"Inorg. Chem.",,"vol. 48","No. 17","pp. 8063-8065",2009,Sept.