Functionally substituted derivatives of (η5-cyclopentadienyl)triisopropoxytitanium and (η5-cyclopentadienyl)trichlorotitanium

Article abstract of DOI:10.1016/0022-328X(94)05160-D

A series of new functionally substituted (η⁵-cyclopentadienyl)titanium trichlorides and triisopropoxides are described. (η⁵-Pentaphenylcyclopentadienyl)- and (η⁵-diphenylphosphinylcyclopentadienyl)titanium triisopropoxide (2) have been obtained in good yield from reactions of (C5Ph5)Na and (C5H4PPh2)Li, respectively, with chlorotitanium triisopropoxide.Treatment of 1 with hydrogen chloride in refluxing toluene forms (η⁵-pentaphenylcyclopentadienyl)titanium trichloride (6) in quantitative yield. (η⁵-N,N-Dimethylaminocyclopentadienyl)titanium trichloride is produced in 54percent yield from a reaction between equimolar amounts of (C5H4NMe2)Li and titanium tetrachloride in pentane solution.A reaction between titanium tetrachloride and carbomethoxytrimethylsilylcyclopentadiene, formed from (C5H4CO2Me)Na and C1SiMe3, produces (η⁵-carbomethoxycyclopentadienyl)titanium trichloride in 78percent yield. Keywords: Titanium; Alkoxides; Cyclopentadienyl derivatives