Synthesis and Ruthenium Coordination Complexes of the Chelating Phosphine Phosphonium-1-indenylide 1,1-Bis(diphenylphosphino)methane-1-indenylide,1‑C<sub>9</sub>H<sub>6</sub>Ph<sub>2</sub>PCH<sub>2</sub>PPh<sub>2</sub>
- Riaz Hussain (634549)
- Kevin G. Fowler (2037304)
- Francoise Sauriol (1955230)
- Michael C. Baird (1368750)
- Peter H. M. Budzelaar (1368747)
Publication date
October 2012
DOIAbstract
Bis(diphenylphosphino)methane-1-indenylide, 1-C<sub>9</sub>H<sub>6</sub>PPh<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub> (1-C<sub>9</sub>H<sub>6</sub>dppm, <b>I</b>), has been synthesized and characterized by NMR spectroscopy and X-ray crystallography. <b>I</b> reacts with [CpRu(MeCN)<sub>3</sub>]PF<sub>6</sub> to form the conventional sandwich complex [CpRu(η<sup>5</sup>-<b>I</b>)]PF<sub>6</sub> (<b>II</b>), which contains a dangling −PPh<sub>2</sub> group. Complex <b>II</b> isomerizes to the 18-electron species <b>IIIc</b>, in which the dangling −PPh<sub>2</sub> group coordinates to the ruthenium, forcing slippage of the five-membered ring to an unanticipated 1,9,8-η<sup>3</sup>-exo mode of coordination
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