Monocyclopentadienyltitanium(III) compounds. IV. Carboxylates

Abstract

Two methods of preparing monocyclopentadienyltitanium(III) carboxylates of general formula cpTi(O₂CR)₂ (cp = π-cyclopentadienyl; R = CF₃, CH₃, CH₂CH₃, CH₂CH₂CH₃, C₆H₅) have been investigated. Although titanium(III) has the configuration 3d,¹ the green or brown dimers are virtually diamagnetic. The diamagnetism probably arises from a superexchange interaction between titanium atoms through the π-system of the carboxylate bridges although the possibility of some direct metal-metal interaction cannot be excluded at this stage. Spectroscopic data are reported for all compounds.     Bis(cyclopentadienyl)titanium(III) carboxylates of general formula cp₂Ti(O₂CR) (R = H, CH₃, CH₂CH₃) were formed when cpTi(O₂CR)₂ were vacuum sublimed at c. 180°C.