作者:Alireza Fattahi、Lev Lis、Steven R. Kass
DOI:10.1021/ja0525511
日期:2005.9.1
The heat of hydrogenation of phenylcyclobutadiene (DeltaH degrees (hyd) = 57.4 +/- 4.9 kcal mol(-1)) was determined via a thermodynamic cycle by carrying out gas-phase measurements on 1-phenylcyclobuten-3-yl cation. This leads to an antiaromatic destabilization energy of 27 +/- 5 kcal mol(-1), a difference of 9.6 +/- 4.9 kcal mol(-1) for the first and second C-H bond dissociation energies of 1-phenylcyclobutene
苯基环丁二烯 (DeltaH 度 (hyd) = 57.4 + /-4.9 kcal mol(-1)) 的氢化热是通过热力学循环通过对 1-苯基环丁烯-3-基阳离子进行气相测量来确定的。这导致 27 +/- 5 kcal mol(-1) 的抗芳香族去稳定能,1-苯基环丁烯的第一个和第二个 CH 键解离能的差异为 9.6 +/- 4.9 kcal mol(-1),以及环丁二烯形成热的估计值为 96 +/- 5 kcal mol(-1)。这些结果与 G3、G3(MP2) 和 B3LYP 计算进行了比较,并代表了单环环丁二烯能量的首次实验测量。