| Home > Improved synthesis of the [Ru(eta(6)-p-cymene)Cl3] anion: facile isolation under mild conditions |
Reaction of [Ru(η<sup>6</sup>-p-cymene)Cl<sub>2</sub>]<sub>2</sub> with two equivalents of [Ph<sub>4</sub>P][Cl] in CH<sub>2</sub>Cl<sub>2</sub> yields [Ph<sub>4</sub>P][Ru(η<sup>6</sup>-p-cymene)Cl<sub>3</sub>], containing a trichlororuthenate(II) anion. In solution, an equilibrium between the product and [Ru(η<sup>6</sup>-p-cymene)Cl<sub>2</sub>]<sub>2</sub> is observed, which in CDCl<sub>3</sub> is nearly completely shifted to the dimer, whereas in CD<sub>2</sub>Cl<sub>2</sub> essentially a 1:1-mixture of the two ruthenium species is present. Crystallization from CH<sub>2</sub>Cl<sub>2</sub>/pentane yielded two different crystals, which were identified by X-ray analysis as [Ph<sub>4</sub>P][Ru(η<sup>6</sup>-p-cymene)Cl<sub>3</sub>] and [Ph<sub>4</sub>P][Ru(η<sup>6</sup>-p-cymene)Cl<sub>3</sub>]⋅CH<sub>2</sub>Cl<sub>2</sub>.