SYNTHESIS AND CHARACTERIZATION OF HETEROB IMETALLIC COMPLEXES OF THE TYPE [((C4H9O)-C-T)(3)TI-ML(N)](ML(N)=CPMO)CO)(3), CPFE(CO)(2), MN(CO)(5)) - SINGLE-CRYSTAL X-RAY STRUCTURAL-ANALYSIS OF [((C4H9O)-C-T)(3)TI-MN(CO)(5)] AT 213 K - EXTENDED HUCKEL MO CALCULATIONS ON [((C4H9O)-C-T)(3)TI-MN(CO)(5)] AND [((C4H9O)-C-T)(3)TI-CO(CO)(3)L](L=CO, PPH3)

The syntheses and characterization of heterobimetallic 'early-late' co mplexes containing the ((C4H9O)-C-t)(3)Ti unit combined with the fragm ents [CpMo(CO)(3)], [Mn(CO)(5)] and [CpFe(CO)(2)] are described. [((C4 H9O)-C-t)(3)Ti-Mn(CO)(5)] crystallizes in the monoclinic space group P 2(1)/c, with a = 11.418(2), b = 10.631(2), c = 19.136(2) Angstrom, bet a = 96.02(1)degrees and Z = 4. The electronic structures and differenc es in stabilities of complexes -t)(3)Ti-Mn(CO)(5)],[((C4H9O)-C-t)(3)Ti -Co(Co)(4)] and [((C4H9O)-C-t)(3)Ti-Co(CO)(3)PPh(3)] are discussed on the basis of EHMO calculations.