Access to Novel Ruthenium−Amidinate Complexes, (η<sup>6</sup>-arene)Ru(η<sup>2</sup>-amidinate)X and [Ru(η<sup>2</sup>-amidinate)(MeCN)<sub>4</sub>]<sup>+</sup>PF<sub>6</sub><sup>-</sup> by Photochemical Displacement of the Benzene Ligand in (η<sup>6</sup>-C<sub>6</sub>H<sub>6</sub>)Ru(η<sup>2</sup>-amidinate)X

2002-08-16T00:00:00Z (GMT) by Taizo Hayashida Hideo Nagashima
Novel ruthenium−amidinate complexes, (η<sup>6</sup>-C<sub>6</sub>H<sub>5</sub>R)Ru(η<sup>2</sup>-amidinate)X (R = Me, OMe, F) (<b>4</b>) and [Ru(η<sup>2</sup>-amidinate)(MeCN)<sub>4</sub>]<sup>+</sup>PF<sub>6</sub><sup>-</sup> (<b>5</b>) are synthesized by photochemical displacement of the benzene ligand in (η<sup>6</sup>-C<sub>6</sub>H<sub>6</sub>)Ru(η<sup>2</sup>-amidinate)X (<b>3</b>) by arenes or MeCN. The acetonitrile ligands of <b>5</b> are easily replaceable by other σ-donor ligands (L) such as pyridines, phosphines, and isocyanides to afford the corresponding derivatives, [Ru(η<sup>2</sup>-amidinate)(MeCN)<i><sub>n</sub></i>(L)<sub>4</sub><sub>-</sub><i><sub>n</sub></i><sup>+</sup>]PF<sub>6</sub><sup>-</sup> (<i>n</i> = 1 or 2).