Reaction of ReH7(PPh3)2 with silanes : preparation and characterization of the first silyl polyhydride complexes, ReH6(SiR3)(PPh3)2 (SiR3=SiPh3, SiEt3, SiHEt2)

Reaction of silanes with ReH 7 (PPh 3 ) 2 gives the novel rhenium silyl hexahydride complexes ReH 6 (SiR 3 )(PPh 3 ) 2 (SiR 3 =SiPh 3 (2a), SiEt 3 (2b), SiHEt 2 (2c)), which have been fully characterized by IR and 1 H, 31 P, and 13 C NMR spectroscopy and, in the case of 2a, by single-crystal X-ray crystallography