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Intramolecular C–C Bond Coupling of Nitriles to a Diimine Ligand in Group 7 Metal Tricarbonyl Complexes

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posted on 2015-12-07, 00:00 authored by Veeranna Yempally, Wai Yip Fan, Bruce A. Arndtsen, Ashfaq A. Bengali
Dissolution of M­(CO)<sub>3</sub>(Br)­(L<sup>Ar</sup>) [L<sup>Ar</sup> = (2,6-Cl<sub>2</sub>-C<sub>6</sub>H<sub>3</sub>-NCMe)<sub>2</sub>CH<sub>2</sub>] in either acetonitrile [M = Mn, Re] or benzonitrile (M = Re) results in C–C coupling of the nitrile to the diimine ligand. When reacted with acetonitrile, the intermediate adduct [M­(CO)<sub>3</sub>­(NCCH<sub>3</sub>)­(L<sup>Ar</sup>)]Br forms and undergoes an intramolecular C–C coupling reaction between the nitrile carbon and the methylene carbon of the β-diimine ligand.

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