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J Am Chem Soc. 2008 May 21;130(20):6624-38. doi: 10.1021/ja710669w. Epub 2008 Apr 30.

The reactivity patterns of low-coordinate iron-hydride complexes.

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1
Department of Chemistry, University of Rochester, Rochester, New York, 14627, USA.

Abstract

We report a survey of the reactivity of the first isolable iron-hydride complexes with a coordination number less than 5. The high-spin iron(II) complexes [(beta-diketiminate)Fe(mu-H)] 2 react rapidly with representative cyanide, isocyanide, alkyne, N 2, alkene, diazene, azide, CO 2, carbodiimide, and Brønsted acid containing substrates. The reaction outcomes fall into three categories: (1) addition of Fe-H across a multiple bond of the substrate, (2) reductive elimination of H 2 to form iron(I) products, and (3) protonation of the hydride to form iron(II) products. The products include imide, isocyanide, vinyl, alkyl, azide, triazenido, benzo[ c]cinnoline, amidinate, formate, and hydroxo complexes. These results expand the range of known bond transformations at iron complexes. Additionally, they give insight into the elementary transformations that may be possible at the iron-molybdenum cofactor of nitrogenases, which may have hydride ligands on high-spin, low-coordinate metal atoms.

PMID:
18444648
PMCID:
PMC2474859
DOI:
10.1021/ja710669w
[Indexed for MEDLINE]
Free PMC Article
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