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Reversible double insertion of aryl isocyanates into the Ti-O bond of titanium(IV) isopropoxide

Ghosh, R and Nethaji, M and Samuelson, AG (2005) Reversible double insertion of aryl isocyanates into the Ti-O bond of titanium(IV) isopropoxide. In: Journal of Organometallic Chemistry, 690 (5). pp. 1282-1293.

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The insertion of phenyl isocyanate into titanium isopropoxide leads to the formation of a dimeric complex [Ti(O ' Pr)(2)(mu-O ' Pr){C6H5N(O ' Pr)CO}](2) (1) which has been structurally characterized. Reaction of titanium isopropoxide with two and more than 2 equiv. of phenyl isocyanate is complicated by competitive, reversible insertion between the titanium carbamate and titanium isopropoxide. The ligand formed by insertion of phenyl isocyanate into the titanium carbamate has been structurally characterized in its protonated form C6H5N{C(O ' Pr)O}C(O)N(H)C6H5 (3aH). Insertion into the carbamate is kinetically favored whereas insertion into isopropoxide gives the thermodynamically favored product. (c) 2004 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Publication: Journal of Organometallic Chemistry
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 04 Jun 2010 10:16
Last Modified: 19 Sep 2010 06:01
URI: http://eprints.iisc.ac.in/id/eprint/27547

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