Christopher L. Gross, Dianna M. Young, Arthur J. Schultz and Gregory S. Girolami
Protonation of the osmium(IV) hydrides (C5Me5)OsH3(L) with HBF4 in diethyl ether afforded the cationic dihydrogen complexes [(C5Me5)Os(H2)H2(L)][BF 4], where L is PPh3 1 or AsPh3 2; a single-crystal neutron diffraction study of 1 reveals that the H–H distance is 1.014(11) Å.