DIALKYLTITANIUM AND CHLOROALKYLTITANIUM ANSA-METALLOCENE COMPLEXES - SYNTHESIS AND CHARACTERIZATION - CRYSTAL-STRUCTURE OF [ETA-5-ETA-5-(C5H4)2SI(CH3)2]TICLCH3

Dialkyl and chloroalkyl ansa-titanocene complexes [eta-5-eta-5-(C5H4)2Si(CH3)2]TIR2 [R = CH3 (1), Bz (2), o-xylidene (3)] and [eta-5-eta-5-(C5H4)2Si(CH3)2]TIClR [R = CH3 (4), CH2Si(CH3)3 (5), Si(CH3)3 (6)] were prepared by reacting the ansa-metallocene dihalide [eta-5-eta-5-(C5H4)2Si(CH3)2]TiCl2 with the adequate alkyl reagent. [eta-5-eta-5-(C5H4)2Si(CH3)2]TiClCH3 (4) crystallizes from toluene/hexane in the monoclinic space group P2(1)/m with unit cell dimensions a = 7.270 (7) angstrom, b = 8.751 (9) angstrom, c = 10.66 (1) angstrom, beta = 90.78 (6)-degrees, V = 678 (2) angstrom 3, and D(calcd) = 1.392 g cm-3. The structure was refined to R = 0.048 and R(w) = 0.046 for 7887 reflections having I > 3-sigma-(I).