Dihydrogen and silane addition to base-free, monomeric bis(cyclopentadienyl)titanium oxides

Tamara E. Hanna, Emil Lobkovsky, Paul J. Chirik

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Synthesis of a family of monomeric, base-free bis(cyclopentadienyl)titanium oxide complexes, (η5-C5Me4R) 2Ti=O (R = iPr, SiMe3, SiMe2Ph), has been accomplished by deoxygenation of styrene oxide by the corresponding sandwich compound. One example, (η5-C5Me 4SiMe2Ph)2Ti=O, was characterized by X-ray diffraction. All three complexes undergo clean and facile hydrogenation at 23°C, yielding the titanocene hydroxy hydride complexes (η5- C5Me4R)2Ti(OH)H. For (η5-C 5Me4SiMe3)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°C consistent with a 1,2-addition pathway. Isotope effects of the same direction but smaller magnitudes were determined for silane addition.

Original languageEnglish (US)
Pages (from-to)2359-2361
Number of pages3
JournalInorganic Chemistry
Issue number7
StatePublished - Apr 2 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry


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