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

被引：20

作者：

Ghosh, R ^{[1
]}

Nethaji, M ^{[1
]}

Samuelson, AG ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2005年 / 690卷 / 05期

关键词：

aryl isocyanates; multiple insertion; titanium isopropoxide; reversible insertion;

D O I：

10.1016/j.jorganchem.2004.11.038

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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.

引用

页码：1282 / 1293

页数：12

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