Unimolecular rearrangements of carbanions in the gas phase. 2. Cyclopropyl anions
作者:Phillip K. Chou、Gregg D. Dahlke、Steven R. Kass
DOI:10.1021/ja00054a045
日期:1993.1
examined the gas-phase unimolecular rearrangements of a series of substituted cyclopropyl anions (CHXCH 2 CY - ; X=H, Y=Ph, CHO, and CN; X=Y=CO 2 CH 3 ) with a variable temperature flowing afterglow device. The ring-opening barriers range from 19 to ≥36 kcal mol -1 and are well reproduced by ab initio molecular orbital calculations.An analysis of eight monosubstituted cyclopropyl anions reveals that the
我们研究了一系列取代的环丙基阴离子(CHXCH 2 CY - ;X=H、Y=Ph、CHO 和 CN;X=Y=CO 2 CH 3 )的气相单分子重排和可变温度流动余辉设备。开环势垒范围从 19 到≥36 kcal mol -1 并且通过从头算分子轨道计算得到了很好的再现。对八个单取代环丙基阴离子的分析表明,这些离子的灵活性(易于反转)和热力学稳定性解释了他们的异构化倾向