Synthesis and properties of silicon, germanium, and tin derivatives of cyclopentadienyltricarbonylrhenium

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Abstract
The preparation and properties of a series of rhenium compounds of the general formula (η-C5H5)Re(CO)2XY in which X or Y or both is a silyl, germyl, or stannyl ligand are reported. The silyl hydrides cis-(η-C5H5)Re(CO)2(SiR3)H (R = Ph, CH2Ph) and cis-(η-C5H5)Re(CO)2(SiPh2H)H were obtained by ultraviolet irradiation of (η-C5H5)Re(CO)3 and the appropriate silane. The hydrides trans-(η-C5H5)Re(CO)2XH(X = SiPh3, GeCl3, GeBr3, SnCl3) were obtained by protonation of the corresponding anions. These new anions [(η-C5H5)Re(CO)2X]− also reacted with other electrophiles to yield compounds of the type trans-(η-C5H5) Re(CO)2XY (Y = Me, halogen, SnR3). The reaction of (η-C5H5)Re(CO)3 with Cl3GeH or Ph3SnH yielded only the compounds trans-(η-C5H5)Re(CO)2(GeCl3)2 and trans-(η-C5H5)Re(CO)2(SnPh3)2 respectively. Infrared and 1H nmr spectra are reported for all compounds, and v(Re–H) values for the hydrides have been obtained from Raman spectra.

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