Bera, Barun ; Patil, Yogesh P. ; Nethaji, Munirathinam ; Jagirdar, Balaji R. (2011) A homobimetallic complex of chromium(0) with a σ-borane component Dalton Transactions, 40 (40). pp. 10592-10597. ISSN 0300-9246
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Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/2011...
Related URL: http://dx.doi.org/10.1039/C1DT10584A
Abstract
The synthesis, characterization, and reactivity of a chromium(0) complex bearing an amine–borane moiety (η6-C6H5CH2NMe2·BH3)Cr(CO)3 (2) is reported. Photolysis of complex 2 results in the elimination of a CO ligand followed by the formation of an intramolecular σ-borane complex (η1-(η>6-C6H5CH2NMe2·BH2–H))Cr(CO)2 (3). This species was characterized in solution by NMR spectroscopy. Reaction of complex 2 with photochemically generated (OC)5Cr(THF) affords a novel homobimetallic σ-borane complex (OC)3Cr(η6-C6H5CH2NMe2·BH2–H–Cr(CO)5) (4), wherein one of the BH moieties is bound to the chromium center in an η1-fashion. The σ-borane complex 4 was isolated in moderate to good yield (72%). The BH3 fragment in the complexes 3 and 4 are highly dynamic involving exchange of the BH hydrogen bound to the metal with the terminal BH hydrogen atoms. The dynamics has been studied using variable-temperature NMR spectroscopy. Complexes 2 and 4 have been characterized by X-ray crystallography.
Item Type: | Article |
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Source: | Copyright of this article belongs to Royal Society of Chemistry. |
ID Code: | 98635 |
Deposited On: | 09 Dec 2014 10:56 |
Last Modified: | 09 Dec 2014 10:56 |
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