文献索引：Arduengo III, Anthony J.; Rasika Dias; Harlow, Richard L.; Kline, Michael Journal of the American Chemical Society, 1992 , vol. 114, # 14 p. 5530 - 5534
Abstract: Four new stable nucleophilic carbenes have been synthesized and structurally characterized. The remarkable ability of the imidazole nucleus to stabilize a carbene center at the C-2 position is demonstrated by the isolation of 1, 3, 4, 5-tetramethylimidazol-2- ylidene. The isolation of three imidazol-2-ylidenes that bear aryl substituents is counter to speculations based on previous reports.
