Photochemical reactions of bis(η5-cyclopentadienyl)- titanium dichloride

Irradiation of benzene solutions 10^?3M in both titanocene-d₁₀ dichloride and titanocene dichloride with light of wavelengths 313, 360, 400, and 520 nm leads to the formation of titanocene-d₅ dichloride with quantum yields of 0.02, 0.005, 0.01 and 0.007 mol Ei^?1, respectively. Photodecomposition of titanocene dichloride is negligible even at much longer photolysis times than those required for isotopic equilibration. Photolysis of benzene solutions 10^?2M in titanocene dichloride and 1.0 M in methanol leads to the formation of cyclopentadienyl(methoxo)titanium dichloride with a quantum yield of about 0.08 mol Ei^?1 when the irradiating wavelength is 313 nm.