A thermodynamic study of the dimerization of cyclopentadiene
A thermodynamic study of the dimerization of cyclopentadiene
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环戊二烯二聚反应的热力学研究
DOI：
10.1071/ch9681789
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发表时间：
1968
影响因子：
1.1
通讯作者：
H. Hull
中科院分区：
文献类型：
--
作者：
A. Turnbull;H. Hull
用绝热量热计测定了环戊二烯在液相250℃时二聚成内二环戊二烯的热为-9.22±0.3 kcal/mol单体。用膨胀计测定了液相在250度时二聚化的速率，得到初始二阶速率常数为4.99 × 10-5。mole-l min-l。用沸点法测量内二环戊二烯在77.5- 149.60范围内的蒸气压，得到了关系式（p in torr）：固态和气态的标准生成热分别为31.1±0.5千卡/摩尔和42.2±0千卡/摩尔。6 kcal/mol，内二环戊二烯，并讨论了应变能和二聚化平衡。
The heat of dimerization of cyclopentadiene to endo-dicyciopentadiene in the liquid phase at 25o was measured in an adiabatic calorimeter to be -9.22 ± 0.3 kcal/mole monomer. The rate of dimerization in the liquid phase at 25o was followed with a dilatometer and the initial second-order rate constant found to be 4.99 x 10-5. mole-l min-l. The vapour pressure of endo-dicyclopentadiene, measured by a boiling point method in the range 77.5-149.6o, gave the relation (p in torr): RInp ? 11342/T -2.6505In T + 54.7855 The standard heats of formation of solid, 31.1 ± 0.5 kcal/mole, and gaseous, 42.2 ± 0. 6 kcal/mole, endo-dicyclopentadiene were derived, and the strain energy and dimerization equilibria discussed.