REACTIVITY OF EARLY-TRANSITION-METAL FULVENE COMPLEXES - TRANSFORMATION OF A 2,3,4,5-TETRAMETHYLFULVENE LIGAND INTO A BIDENTATE DIALKOXIDE WITH 4 ASYMMETRIC CARBON-ATOMS - MOLECULAR-STRUCTURE OF TI[(OCHPH)2C5ME4(CH2)]CL2

Cp*FvTiCl (1; Cp* = eta-5-C5H5, Fv = eta-6-C5Me4CH2) reacts with benzaldehyde, yielding Cp*Ti[(OCHPh)2C5Me4(CH2)]Cl (2) as the result of insertion in two Ti-C bonds at the 2- and 4-positions of the fulvene ligand in 1. Complex 2 reacts with HCl to give Cp*TiCl3 (3) and the corresponding dialcohol and with TiCl4 to give 3 and Ti[(OCHPh)2C5Me4(CH2)]Cl2 (5). X-ray diffraction analysis of 5 shows it to be a dialkoxide-dichloride monomeric titanium complex with a tetrahedral arrangement of the ligands around the metal center. Crystal data for C24H26Cl2O2Ti: monoclinic, P2(1)/n, a = 10.602 (5) angstrom, b = 14.157 (4) angstrom, c = 15.274 (5) angstrom, beta = 103.76 (3)-degrees, V = 2227 (1) angstrom-3, Z = 4, R = 0.037.