作者:Markus Braun、Walter Frank、Christian Ganter
DOI:10.1021/om201235c
日期:2012.3.12
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。