DI-U-OXO-(ETA-1-ETA-5-1,2,3,4-TETRAMETHYL-5-METHYLENE-1,3-CYCLOPENTADIENE-BIS[(ETA-PENTAMETHYLCYCLOPENTADIENYL)TITANIUM], (MU-O)2[MU-[ETA-1-ETA-5-C5(CH2)(CH3)4]][TI[ETA-5-C5(CH3)5]]2, A COMPLEX CONTAINING A BRIDGING TETRAMETHYLMETHYLENECYCLOPENTADIENYL LIGAND