THE DIMERIC STRUCTURE OF BIS(1,3-DIMETHYLCYCLOPENTADIENYL)TITANIUM(III) CHLORIDE

The X-ray crystal structure analysis of bis(1,3-dimethylcyclopentadien yl)titanium(III) chloride revealed that it is a centrosymmetric chlori ne-bridged dimer [(eta(5)-C(5)H(3)Me(2))(2)Ti(mu-Cl)](2) (1) with the Ti-Ti distance of 3.9155(8) Angstrom. Its skeleton is virtually identi cal with those of the [(eta(5)-C5H5)(2)Ti(mu-Cl)](2) and [(eta(5)-C(5) H(4)Me)(2)Ti(mu-Cl)](2) dimers. The solution EPR study proved that 1 r emains a dimer in toluene whereas it dissociates in 2-methyltetrahydro furan (MTHF) to give (eta(5)-C(5)H(3)Me(2))(2)TiCl. MTHF. The EPR spec tra of frozen toluene solutions proved that 1 forms the triplet state whose g-tensor and zero-field splitting D are virtually the same as th ose of [(eta(5)-C5H5)(2)Ti(mu-Cl)](2).