Preparation of hydride complexes of ruthenium with bidentate phosphite ligands

The synthesis of ruthenium dihydride complexes RuH2(P-P)2 stabilised by bidentate phosphite ligands is described. Carbonyl dihydride derivatives RuH2(CO)(PHPh2)(P-P), containing one secondary phosphine, is also reported. Spectroscopic and crystallographic data of new complexes are discussed.