C–H Activation on an Oxo-Bridged Dititanium Complex: From Alkyl to μ‑Alkylidene Functionalities González-PérezJuan I. MartínAvelino MenaMiguel SantamaríaCristina 2016 Thermal treatment of the dinuclear compound [{Ti­(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)­(CH<sub>2</sub>SiMe<sub>3</sub>)<sub>2</sub>}<sub>2</sub>­(μ-O)] (<b>1</b>) provides the formation of the metallacycle derivatives [Ti<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>­(μ-CH<sub>2</sub>­SiMe<sub>2</sub>CH<sub>2</sub>)­(CH<sub>2</sub>­SiMe<sub>3</sub>)<sub>2</sub>­(μ-O)] (<b>2</b>) and [Ti<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>­(μ-CH<sub>2</sub>­SiMe<sub>2</sub>CH<sub>2</sub>)<sub>2</sub>­(μ-O)] (<b>3</b>) and the μ-alkylidene complex [Ti<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>­(μ-CH<sub>2</sub>­SiMe<sub>2</sub>CH<sub>2</sub>)­(μ-CHSiMe<sub>3</sub>)­(μ-O)] (<b>4</b>) by sequential carbon–hydrogen activation processes. The reaction of <b>3</b> with <i>tert</i>-butylisocyanide, in 1:1 and 1:2 ratios, leads to the η<sup>2</sup>-iminoacyl complexes [Ti<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>­(μ-<i>t</i>BuNC­CH<sub>2</sub>­SiMe<sub>2</sub>CH<sub>2</sub>)­(μ-CH<sub>2</sub>­SiMe<sub>2</sub>CH<sub>2</sub>)­(μ-O)] (<b>5</b>) and [Ti<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>­(μ-<i>t</i>BuNC­CH<sub>2</sub>­SiMe<sub>2</sub>CH<sub>2</sub>)<sub>2</sub>­(μ-O)] (<b>6</b>), respectively. The molecular structures of complexes <b>3</b>, <b>4</b>, <b>5</b>, and <b>6</b> have been determined by single-crystal X-ray diffraction analyses.