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Reactions of ‘pincer’ pyridine dicarbene complexes of Fe(0) with silanes

Reactions of ‘pincer’ pyridine dicarbene complexes of Fe(0) with silanes
Reactions of ‘pincer’ pyridine dicarbene complexes of Fe(0) with silanes
Reactions of Fe(C-N-C)(N2)2, 1a, or Fe(C-NMe-C)(N2)2, 1b, C-N-C = 2,6-bis(arylimidazol-2-ylidene)pyridine, C-NMe-C = 2,6-bis(arylimidazol-2-ylidene)-3,5-dimethylpyridine, aryl = 2,6-iPr2C6H3, with silanes are described. Complex 1a with excess SiPhH3 and complex 1b with excess Si(tol)H3, Ph = phenyl, C6H5, tol = 2-methylphenyl, gave the complexes [Fe(C-N-C)(SiH2Ph)2(?2-H-SiH2Ph)], 2a, and [Fe(C-NMe-C)(SiH2tol)2(?2-H-SiH2tol)], 2b, respectively. Complex 1b with excess SiPhH3 gave [Fe(C-NMe-C)(SiH2Ph)2(H)2], 3, which was formulated as a dihydride based on the relaxation time T1(min) in the 1H-NMR spectra. Reaction of 1a with SiPh2H2 gave complex [Fe(C-N-C)(SiHPh2)2(?2-H2)], 4, while reaction with Si(mes)H3 gave complex [Fe(C-N-C)(SiH2mes)2(N2)], 5, mes = mesityl, 2,4,6-trimethylphenyl. The comparison of the reactivity with other ‘pincer’ complexes of iron and the mechanism leading to 2a–5 are discussed.
0300-9246
7189-7195
Pugh, David
33c2663d-b70d-4366-8f0a-8765713b25ad
Wells, Neil J.
86312185-007b-495b-86da-4e2e5b9b8025
Evans, David J.
5d6e0d3a-4d43-4214-839e-b2d24b6f3b97
Danopoulos, Andreas A.
4919c13e-ebe4-4456-b329-c806c8e22236
Pugh, David
33c2663d-b70d-4366-8f0a-8765713b25ad
Wells, Neil J.
86312185-007b-495b-86da-4e2e5b9b8025
Evans, David J.
5d6e0d3a-4d43-4214-839e-b2d24b6f3b97
Danopoulos, Andreas A.
4919c13e-ebe4-4456-b329-c806c8e22236

Pugh, David, Wells, Neil J., Evans, David J. and Danopoulos, Andreas A. (2009) Reactions of ‘pincer’ pyridine dicarbene complexes of Fe(0) with silanes. Dalton Transactions, (35), 7189-7195. (doi:10.1039/b907141p).

Record type: Article

Abstract

Reactions of Fe(C-N-C)(N2)2, 1a, or Fe(C-NMe-C)(N2)2, 1b, C-N-C = 2,6-bis(arylimidazol-2-ylidene)pyridine, C-NMe-C = 2,6-bis(arylimidazol-2-ylidene)-3,5-dimethylpyridine, aryl = 2,6-iPr2C6H3, with silanes are described. Complex 1a with excess SiPhH3 and complex 1b with excess Si(tol)H3, Ph = phenyl, C6H5, tol = 2-methylphenyl, gave the complexes [Fe(C-N-C)(SiH2Ph)2(?2-H-SiH2Ph)], 2a, and [Fe(C-NMe-C)(SiH2tol)2(?2-H-SiH2tol)], 2b, respectively. Complex 1b with excess SiPhH3 gave [Fe(C-NMe-C)(SiH2Ph)2(H)2], 3, which was formulated as a dihydride based on the relaxation time T1(min) in the 1H-NMR spectra. Reaction of 1a with SiPh2H2 gave complex [Fe(C-N-C)(SiHPh2)2(?2-H2)], 4, while reaction with Si(mes)H3 gave complex [Fe(C-N-C)(SiH2mes)2(N2)], 5, mes = mesityl, 2,4,6-trimethylphenyl. The comparison of the reactivity with other ‘pincer’ complexes of iron and the mechanism leading to 2a–5 are discussed.

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e-pub ahead of print date: 23 July 2009
Published date: 2009
Organisations: Chemistry

Identifiers

Local EPrints ID: 200441
URI: http://eprints.soton.ac.uk/id/eprint/200441
ISSN: 0300-9246
PURE UUID: e23dfc97-e07e-4f37-9cb7-01d0e3bf60a9
ORCID for Neil J. Wells: ORCID iD orcid.org/0000-0002-4607-5791

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Date deposited: 25 Oct 2011 11:26
Last modified: 15 Oct 2019 00:50

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