A series of methyl and allyl derivatives of ansa-titano- and ansa-zirc
onocenes with isopropylidene or dimethylsilyl bridging groups were syn
thesized. A dinuclear complex, [Me2C(CH4)2]2Ti2O2, resulting from the
thermal decomposition of the corresponding dimethyl derivative of ansa
-titanocene in the air, was characterized by X-ray diffraction analysi
s.