Bera, Barun and Patil, Yogesh P and Nethaji, Munirathinam and Jagirdar, Balaji R (2011) A homobimetallic complex of chromium(0) with a sigma-borane component. In: Dalton Transactions, 40 (40). pp. 10592-10597.
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Abstract
The synthesis, characterization, and reactivity of a chromium(0) complex bearing an amine-borane moiety (eta(6)-C(6)H(5)CH(2)NMe(2)center dot BH(3))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 sigma-borane complex (eta(1)-(eta(6)- C(6)H(5)CH(2)NMe(2)center dot BH(2)-H))Cr(CO)(2) (3). This species was characterized in solution by NMR spectroscopy. Reaction of complex 2 with photochemically generated (OC)(5)Cr(THF) affords a novel homobimetallic sigma-borane complex (OC)(3)Cr(eta(6)-C(6)H(5)CH(2)NMe(2)center dot BH(2)-H-Cr(CO)(5)) (4), wherein one of the BH moieties is bound to the chromium center in an eta(1)-fashion. The sigma-borane complex 4 was isolated in moderate to good yield (72%). The BH(3) 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: | Journal Article |
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Publication: | Dalton Transactions |
Publisher: | Royal Society of Chemistry |
Additional Information: | Copyright of this article belongs to Royal Society of Chemistry. |
Department/Centre: | Division of Chemical Sciences > Inorganic & Physical Chemistry |
Date Deposited: | 04 Nov 2011 08:43 |
Last Modified: | 04 Nov 2011 08:43 |
URI: | http://eprints.iisc.ac.in/id/eprint/41945 |
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