Reactivity of the unsaturated dihydrides [Mn2(.mu.-H)2(CO)6(.mu.-L2)] (L2 = Ph2PCH2PPh2, (EtO)2POP(OEt)2) toward boron hydrides. X-ray crystal structure of [Mn2(.mu.-BH4)(.mu.-H)(CO)5(.mu.-Ph2PCH2PPh2)], a molecule displaying a novel coordination mode of the tetrahydroborate ligand | Publicación