electronic parameter of 2068 cm–1 was calculated for the diamidocarbene 2, which characterizes this ligand as the least electron donating NHC known so far. The dimerization product of carbene 2, the intensly fluorescing tetraamido ethylene 3, showed an unexpected chemical stability. Treatment of the chloro compound 1a with methanol afforded the methoxide 5a, whose structure was determined by X-ray
研究了基于草酰胺的卡宾2的反应性。在卡宾的加入下用
苯乙烯或
丙烯酸甲酯进行处理,得到相应的
环丙烷化产物6a,b。用元素
硒获得
硒化物7,其通过X射线衍射表征。Rh复合物[(COD)RhCl(2)](10)的结构也得到了表征。从二羰基衍
生物的IR光谱[(CO)2的RhCl(2)](11)2068厘米托尔曼电子参数-1计算为diamidocarbene 2,其特征在于该
配体是迄今为止已知的最少给电子的NHC。卡宾2的二聚产物,即强烈发荧光的四酰胺基
乙烯3,显示了出乎意料的
化学稳定性。用
甲醇处理
氯化合物1a,得到
甲醇盐5a,其结构通过X射线衍射确定。