IR spectra and structure of 2,5-pyrrolidinedione (succinimide) and of its nitranion: experimental and ab initio MO studies
作者:B.A Stamboliyska、Y.I Binev、V.B Radomirska、J.A Tsenov、I.N Juchnovski
DOI:10.1016/s0022-2860(99)00200-8
日期:2000.1
labelled derivative, and of their nitranions have been studied on the basis of both quantitative IR spectra and ab initio RHF and MP2 calculations. The theory describes well the strong frequency decrease (down to 138 cm−1) and the twofold increase in both the intensity and splitting of the carbonyl stretching bands, caused by the conversion of the succinimide molecule into the nitranion. According
摘要 基于定量红外光谱和 ab initio RHF 和 MP2 计算,研究了 2,5-吡咯烷二酮(琥珀酰亚胺)、其 15N 标记衍生物及其硝基阴离子的结构。该理论很好地描述了强烈的频率下降(低至 138 cm-1)和羰基伸缩带的强度和分裂的两倍增加,这是由琥珀酰亚胺分子转化为硝基阴离子引起的。根据计算,这种转换导致环中所有键长和角度发生本质变化,但它仍然是平面的。阴离子电荷主要位于羰基内。琥珀酰亚胺的碱金属衍生物主要以游离溶剂化离子形式存在于 DMSO 中。