Titanocene, zirconocene, and hafnocene derivatives with an interannular 1,1,4,4-tetramethyl-1,4-disilabutylene bridge were synthesized by the reaction of the dillithium derivative of 1,4-dicyclopentadienyl-1,1,4,4-tetramethyl-1, 4-disilabutane with titanium, zirconium, and hafnium tetrachlorides in THF. The identities of all new compounds have been documented by analytical as well as by spectroscopic (IR, MS, H-1 and C-13 NMR) data.