Synthesis and structure of a base-stabilized silyl(silylene)tantalum complex

Thermal reaction Of CP2Ta(eta(2)-C3H6) with HSiMe2SiMe2OMe in toluene at 60 degrees C gave Cp2Ta{(SiMe2O)-O-...(Me)(SiMe2)-Si-...} (7%) and CP2TaH(SiMe2SiMe2OMe)(2) (8%). The former methoxy-stabilized silyl(silylene) complex was characterized by X-ray diffraction study.