Synthesis and reactivity of hydride and dihydrogen complexes of ruthenium with tris(pyrazolyl)borate and phosphite ligands

The synthesis of classical and non-classical ruthenium (II) mixed-ligand hydride complexes RuHTpL(PPh3) and [Ru(η2- H2)TpL(PPh3)]+ with phosphite and tris(pyrazolyl)borate is described. Vinylidene [RuTp{CC(H)R}L(PPh3)]BPh4 and allenylidene [RuTp(CCCR1R2)L(PPh3)]BPh4 complexes were also prepared by allowing η2-H2 derivatives to react with the appropriate HCCR and HCCC(OH)R1R2 alkynes.