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

Ghosh, Rajshekhar and Nethaji, Munirathinam and Samuelson, Ashoka G (2004) 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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Abstract

The insertion of phenyl isocyanate into titanium isopropoxide leads to the formation of a dimeric complex $[Ti(O^iPr)_2(\mu -O^iPr){C_6H_5N(O^iPr)CO}]_2$ (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 $C_6H_5N{C(O^iPr)O}C(O)N(H)C_6H_5 (3aH)$. Insertion into the carbamate is kinetically favored whereas insertion into isopropoxide gives the thermodynamically favored product.

Item Type:	Journal Article
Publication:	Journal of Organometallic Chemistry
Publisher:	Elsevier B.V.
Additional Information:	Copyright for this article belongs to Elsevier B.V.
Keywords:	Aryl isocyanates;Multiple insertion;Titanium isopropoxide;Reversible insertion
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	27 Nov 2007
Last Modified:	19 Sep 2010 04:23
URI:	http://eprints.iisc.ac.in/id/eprint/5192

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