Synthesis and reactivity of silicon transition metal complexes, 43 -: Iron and ruthenium fragment substituted disilanes C5R5(OC)2M-Si2X5 (R = H, Me; M = Fe, Ru; X = Cl, H):: Synthesis, structural and Raman spectroscopic characterisation, DFT calculation

Reaction of the sodium metalates Na[M(CO)(2)C5R5] [M = Fe, R = H (1a), Me (1b); M = Ru, R = H (1c), Me (1d)] with an equimolar amount of hexachlorodisilane yields the metallopentachlorodisilanes C5R5(OC)(2)M-SiCl2-SiCl3 (2a-d), which can be converted into the pentahydrido analogues C5R5(OC)(2)M-SiH2-SiH3 (3a-c) via Cl/H exchange with LiAlH4. Due to the activating effect of the transition metal fragment chlorination of 3a-c with CCl4 or HCCl3 occurs at the alpha-silicon to give C5R5(OC)(2)M-SiCl2-SiH3 (4a-c). The metallo-disilanes were characterised by H-1-. C-13-, Si-29-NMR, IR and especially Raman spectroscopy. The structures of C5H5(OC)(2)Fe-Si2Cl5 (2a) and C5Me5(OC)(2)Fe-Si2H5 (3b) have been determined by X-ray analysis; 2a,b, 3a,b were theoretically described by DFT calculations.