Title

Dirhenium Carbonyl Complexes Bearing 2-Vinylpyridine, Morpholine and 1-Methylimidazole Ligands

Document Type

Article

Language

eng

Publication Date

4-15-2008

Publisher

Elsevier

Source Publication

Journal of Organometallic Chemistry

Source ISSN

0022-328X

Abstract

Treatment of the labile compound [Re2(CO)8(MeCN)2] with 2-vinylpyridine in refluxing benzene affords exclusively the new compound [Re2(CO)8(μ-η12-NC5H4CHCH2)] (1) in 39% yield in which the μ-η12-vinylpyridine ligand is coordinated to one Re atom through the nitrogen and to the other Re atom via the olefinic double bond. Reaction of [Re2(CO)8(MeCN)2] with morpholine in refluxing benzene furnishes two compounds, [Re2(CO)91-NC4H9O)] (2) and [Re2(CO)81-NC4H9O)2] (3) in 5% and 29% yields, respectively. Reaction of [Re2(CO)8(MeCN)2] with 1-methylimidazole gives [Re2(CO)81-NC3H3N(CH3)}2] (4) and the mononuclear compound fac-[ReCl(CO)31-NC3H3N(CH3)}2] (5) in 18% and 26% yields, respectively. In the disubstituted compounds 2 and 4, the heterocyclic ligands occupy equatorial coordination sites. The mononuclear compound 5 consists of three CO groups, two N coordinated η1-1-methylimidazole ligands and a terminal Cl ligand. The XRD structures of complexes 1, 3 and 5 are reported.

Comments

Journal of Organometallic Chemistry, Vol. 639, Nos. 8-9 (April 15, 2008): 1696-1702. DOI.

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