Small rings. Part 32. The gas phase kinetics, mechanism, and energy hypersurface for the thermolyses of syn- and anti-tricyclo[4.2.0.0]-octane
作者:Robin Walsh、Hans-Dieter Martin、Michael Kunze、Alfred Oftring、Hans-Dieter Beckhaus
DOI:10.1039/p29810001076
日期:——
60, 15, and 25%. The full mechanism is discussed in terms of a likely potential energy hypersurface for C8H12 hydrocarbons. Combustion calorimetry has been used to arrive at ΔH°f(I) values for both syn- and anti-TCO.
在低压(1–10托)和390–419 顺-三环[4.2.0.0]辛烷(syn -TCO)}和412-445 K(反-TCO)的温度范围内研究了标题反应。两种化合物的主要产物为顺式,顺式和顺式,反式-环-辛-1,5-二烯(cc COD和ct COD),此外,反式-TCO由顺式-TCO形成。两种化合物的次要产物均为顺式和反式-1,2-二乙烯基环丁烷(c DVC和tDVC)和4-乙烯基环己烯(VCH)。反应物环辛烷的消失遵循清晰的一阶动力学(独立于压力),且速率常数由方程式(i)和(ii)给出,其中θ= syn -TCO log k / s –1 =(13.37±0.40 )–(31.39±0.74 kcal mol –1)/θ(i)抗-TCO log k / s –1 =(14.69±0.02)–(35.58±0.04 kcal mol –1)/θ(ii)RT In 10。 §两个反应系统都