Synthesis of Novel Substituted Cyclopentadienes and Their Early Transition Metal Complexes

Synthesis of two substituted cyclopentadienes, 1,3-bis(1-methylcyclohexyl) cyclopentadiene, Cp'H and [2-methyl-2-(2-pyridyl)ethyl]cyclopentadiene, Cp"H from fulvene intermediates is reported. These are readily converted to their early transition metal complexes Cp'W(CO)3Me, Cp"Mo(CO)3Me, Cp"W(CO)3Me and [Cp"Ti(O)Cl · CH2Cl2]2. The X-ray crystal structure of the titanium compound shows that the nitrogen of the pyridine cyclopentadienyl substituent is coordinated to the titanium.