Synthesis and structural characterization of N-heterocyclic carbene complexes of silver(I) and rhodium(I) from caffeine

被引：111

作者：

Kascatan-Nebioglu, A ^{[1
]}

Panzner, MJ ^{[1
]}

Garrison, JC ^{[1
]}

Tessier, CA ^{[1
]}

Youngs, WJ ^{[1
]}

机构：

[1] Univ Akron, Dept Chem, Akron, OH 44325 USA

来源：

ORGANOMETALLICS | 2004年 / 23卷 / 08期

关键词：

D O I：

10.1021/om030689r

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The imidazolium cation 1,3,7,9-tetramethylxanthinium methyl sulfate (1a) is obtained by the reaction of caffeine with dimethyl sulfate. The anion exchange of la gives 1,3,7,9-tetramethylxanthinium hexafluorophosphate (1b). Ligand la reacts with Ag2O in water to yield an N-heterocyclic carbene (NHC) silver(I) complex (2a). Similarly, ligand 1b, reacts with Ag2O in DMSO to yield NHC silver(I) complex 2b in high yield. A carbene transfer reaction of 2b with [Rh(COD)Cl](2) gives NHC Rh(I) complex 3. All compounds were characterized by H-1 NMR, C-13 NMR, and mass spectrometry. The solid-state structures of 1b, 2b, and 3 were determined by X-ray crystallography.

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页码：1928 / 1931

页数：4

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