Generation and Trapping of a Cage Annulated Vinylidenecarbene and Approaches to Its Cycloalkyne Isomer
作者:Bichismitha Sahu、Guddeangadi N. Gururaja、Tarun Kumar、Anamitra Chatterjee、Bishwajit Ganguly、Shaikh M. Mobin、Irishi N. N. Namboothiri
DOI:10.1021/jo301215d
日期:2012.8.17
vinylidenecarbene has been generated and successfully trapped without any intermediacy of its cycloalkyne isomer. The greater kinetic and thermodynamic stability of the vinylidenecarbene vis-à-vis its cycloalkyne isomer has been predicted by DFT B3LYP/6-31G* calculations. The calculated results suggest the prospects of the cycloalkyne becoming amenable for trapping, if generated under suitable experimental conditions
一种新型的笼状环化(双同型)亚乙烯基碳烯已经被成功地捕获,并且没有任何环炔异构体的介入。通过DFT B3LYP / 6-31G *计算,可以预测到亚乙烯基碳烯相对于其环炔异构体的更大的动力学和热力学稳定性。计算结果表明,如果在合适的实验条件下生成环炔烃,则存在捕集的前景,这是由于大量的动能壁垒与通过1,2-转移至亚乙烯基碳烯异构体的可能的环收缩有关,以及基本的基态能差。然而,我们所有直接产生和捕获环炔烃的尝试均未获得令人满意的结果。