Polyazolyl chelate chemistry.: 6.: Bidentate coordination of HB(pz)3 (pz = pyrazol-1-yl) to ruthenium and osmium:: Crystal structure of [RuH(CO)(PPh3)2{κ2-HB(pz)3}] - Burns,ID; Hill,AF; White,AJP; Williams,DJ; Wilton-Ely,JDET (ORGANOMETALLICS, 1998)