The reversible amination of tin(II)-ligated imines:: Latent initiators for the polymerization of rac-lactide

被引：59
|
作者：
Nimitsiriwat, Nonsee [1 ]
Gibson, Vernon C. [1 ]
Marshall, Edward L. [1 ]
Elsegood, Mark R. J. [2 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
[2] Univ Loughborough, Dept Chem, Loughborough LE11 3TU, Leics, England
来源：
INORGANIC CHEMISTRY | 2008年 / 47卷 / 12期
关键词：
D O I：
10.1021/ic701671s
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The 1:1 reactions of nine potentially tridentate salicylaldimines with tin(II) diamides, Sn(NR2)(2) (R = Me, Et, Pr-i, SiMe3) have been investigated. With Sn((NPr2)-Pr-i)(2) and Sn(NTMS2)(2), the anticipated products of amine elimination, iminophenoxy tin(II) mono(amide)s, are formed. However, for R = Me and R = Et, nucleophilic attack of the amide at the imino carbon occurs to generate tin(II) complexes of tetradentate, dianionic aminoamidophenoxide ligands. The transfer of the amide is shown to be reversible, with both alcoholysis and the initiation of rac-lactide polymerization apparently mediated by the terminal amide tautomer.
引用
收藏
页码：5417 / 5424
页数：8
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