Nitrile Imines: Matrix Isolation, IR Spectra, Structures, and Rearrangement to Carbodiimides
作者:Didier Bégué、Greg GuangHua Qiao、Curt Wentrup
DOI:10.1021/ja2118442
日期:2012.3.21
nitrile imines was investigated computationally at the B3LYP/6-31G* level. IR spectra were analyzed in terms of calculated anharmonic vibrational spectra and were generally in very good agreement with the calculated spectra. Infrared spectra were found to reflect the structures of nitrile imines accurately. Nitrile imines with IR absorptions above 2200 cm(-1) have essentially propargylic structures, possessing
腈亚胺的结构和反应性是持续争论的主题。几种腈亚胺是通过光化学或热能产生的,并通过红外光谱在低温下在 Ar 基质中进行研究(Ph-CNN-H 6、Ph-CNN-CH(3)17、Ph-CNN-SiMe(3)23、Ph-CNN -Ph 29、Ph(3)C-CNN-CPh(3)34 和硼酸-CNN-硼酸衍生物 39)。在 B3LYP/6-31G* 水平计算研究了取代基对腈亚胺结构和红外吸收的影响。根据计算的非谐振动光谱分析红外光谱,并且通常与计算的光谱非常一致。发现红外光谱可以准确地反映腈亚胺的结构。红外吸收高于 2200 cm(-1) 的腈亚胺基本上具有炔丙基结构,具有 CN 三键(通常为 PhCNNSiMe(3)23、PhCNNPh 29 和硼酸-CNN-硼酸 39)。红外吸收低于约的腈亚胺。2200 cm(-1) 更可能是等离子(例如,HCNNH 1、PhCNNH 6、HCNNPh 43、PhCNNCH(3)17