The novel cyclodimerization of phenylacetylene at a ruthenium(<scp>II</scp>) centre. The synthesis and X-ray structural characterization of the first metallacyclopentatriene, [(η-C<sub>5</sub>H<sub>5</sub>)Ru(C<sub>4</sub>Ph<sub>2</sub>H<sub>2</sub>)Br], and its facile conversion into metallacyclopentadienes - Concepedia

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The novel cyclodimerization of phenylacetylene at a ruthenium(<scp>II</scp>) centre. The synthesis and X-ray structural characterization of the first metallacyclopentatriene, [(η-C<sub>5</sub>H<sub>5</sub>)Ru(C<sub>4</sub>Ph<sub>2</sub>H<sub>2</sub>)Br], and its facile conversion into metallacyclopentadienes

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References

1986

Year

Michel O. Albers, D. J. A. DE WAAL, David C. Liles, David J. Robinson, Eric Singleton, Manfred Wiege

Journal of the Chemical Society Chemical Communications

Abstract

Cyclodimerization of two molecules of phenylacetylene at the ruthenium(II) centre in [(η-C5H5)Ru(η-C8H12= cyclo-octa-1,5-diene) gives the novel ruthenacyclopentatriene [(η-C4H5)Ru(C4Ph2H2)Br] characterized by 1H and 13C n.m.r. spectroscopy and by X-ray analysis; the triene undergoes facile ‘oxidative addition’ with donor ligands L (e.g. morpholine, trimethyl phosphite, dimethylphenylphosphine) in a bimolecular reaction involving an associative mode of activation to give the ruthenacyclopentadienes [(η-C5H5)Ru(L)(C4Ph2H2)Br].