Phenylchlorocarbene, generated by laser flash photolysis of phenylchlorodiazirine, formed highly stable pi-type complexes with 1,3,5-trimethoxybenzene in pentane. The carbene and carbene complexes were in equilibrium. We measured the equilibrium constant (K = 1264 M(-1) at 294 K) and, from its temperature dependence, extracted the associated thermodynamic parameters: DeltaH(o) = -7.1 kcal/mol, DeltaS(o)
苯基
氯卡宾由苯基
氯二氮嗪的激光闪光光解产生,在
戊烷中与
1,3,5-三甲氧基苯形成高度稳定的 pi 型配合物。卡宾和卡宾配合物处于平衡状态。我们测量了平衡常数(K = 1264 M(-1) at 294 K),并从其温度依赖性中提取了相关的热力学参数:DeltaH(o) = -7.1 kcal/mol,DeltaS(o) = -10.2 eu , 和 DeltaG(o) = -4.1 kcal/mol。卡宾配合物通过紫外-可见光谱和计算分析表征。