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Updated: Jul 16, 2026

Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate
Published on: February 23, 2016
Dihydrogen and silane addition to base-free, monomeric bis(cyclopentadienyl)titanium oxides
Tamara E Hanna1, Emil Lobkovsky, Paul J Chirik
1Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, USA.
Abstract:
Synthesis of a family of monomeric, base-free bis(cyclopentadienyl)titanium oxide complexes, (eta5-C5Me4R)2Ti=O (R = iPr, SiMe3, SiMe2Ph), has been accomplished by deoxygenation of styrene oxide by the corresponding sandwich compound. One example, (eta5-C5Me4SiMe2Ph)2Ti=O, was characterized by X-ray diffraction. All three complexes undergo clean and facile hydrogenation at 23 degrees C, yielding the titanocene hydroxy hydride complexes (eta5-C5Me4R)2Ti(OH)H. For (eta5-C5Me4SiMe3)2Ti=O, the kinetics of hydrogenation were first-order in dihydrogen and exhibited a normal, primary kinetic isotope effect of 2.7(3) at 23 degrees C consistent with a 1,2-addition pathway. Isotope effects of the same direction but smaller magnitudes were determined for silane addition.
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