STEREOSELECTIVE REDOX REACTION OF ISODICYCLOPENTADIENE WITH THE BIS(TETRACHLOROALUMINATO)(BENZENE)TITANIUM(II) COMPLEX

Redox reaction of isodicyclopentadiene (isodiCpH, tricyclo[5.2.1.0(2.6 )]deca-2,5-diene) with the (benzene)Ti-II complex (eta(6)-C6H6)Ti[(mu- Cl)(2)AlCl2](2) (1) affords exclusively the exo-faced (isodicyclopenta dienyl)Ti-III complex (eta(5)-C10H11)Ti[(mu-Cl)(2)AlCl2](2) (2). The X -ray crystal analysis of 2 (monoclinic, P2(1)/m, No. 11, a = 7.006(1) Angstrom, b = 17.351(3) Angstrom, c = 8.346(2) Angstrom, beta = 100.30 (1)degrees, Z = 2) revealed a square pyramidal coordination around the Ti(III) atom with four bridging chlorine atoms forming the pyramid ba se and an eta(5)-coordinated isodiCp at its apex. The molecular plane of symmetry is perpendicular to the plane containing the Ti atom and b oth Al atoms and bisects the isodiCp ligand.