STRUCTURE OF BIS(DIHALOALANE-DI-MU-HALO)(ETA-ARENE)TITANIUM(II) COMPLEXES CONTAINING DIFFERENT HALOGEN ATOMS

An attempt was made to detect deviations from the random distribution of chlorine and bromine atoms in the series of bis(dihaloalane-di-μ-halo)(η6-arene) titanium(II) complexes of overall formula (C6H6) · TiAl2ClxBr8-x (1). The distribution of halogen atoms between bridge and outer positions of (1) was studied by the shift of g-values in the e.s.r. spectra of bis(dihaloalane-di-μ-halo)(η5-cyclopentadienyl)titanium(III) complexes obtained by the reaction of (1) with cyclopentadiene, and by the shift of the v2 band in the electronic spectra of (1). Both methods indicated the preferred occupation of bridge positions by chlorine atoms based on the assumption that the g-value and the v2 band position were linearly dependent on the chlorine content in the bridge positions. © 1979 Verlag Chemie, GmbH.