Cationic Ethylzinc Compound: A Benzene Complex with Catalytic Activity in Hydroamination and Hydrosilylation Reactions

2011-11-21T00:00:00Z (GMT) by Rudolf J. Wehmschulte Lukasz Wojtas
The tight ion pair [EtZn­(η<sup>3</sup>-C<sub>6</sub>H<sub>6</sub>)]­[CHB<sub>11</sub>Cl<sub>11</sub>]·C<sub>6</sub>H<sub>6</sub> (<b>1</b>·C<sub>6</sub>H<sub>6</sub>) was obtained through β-hydrogen abstraction and concomitant ethene elimination from Et<sub>2</sub>Zn with the trityl salt [Ph<sub>3</sub>C]­[CHB<sub>11</sub>Cl<sub>11</sub>]. This ionlike species shows catalytic activity in hydrosilylation and intramolecular hydroamination reactions. The amine adduct {CH<sub>2</sub>CHCH<sub>2</sub>C­(Ph<sub>2</sub>)­CH<sub>2</sub>NH<sub>2</sub>}<sub>3</sub>ZnCB<sub>11</sub>Cl<sub>11</sub> (<b>3</b>), which features a rare transition metal–carborane σ bond, was isolated from a hydroamination experiment.