
%0 Journal Article
%A Turnbull, AG 
%A Hull, HS 
%T A thermodynamic study of the dimerization of cyclopentadiene
%J Australian Journal of Chemistry
%D 1968/07/01
%V 21
%N 7
%P 1789-1797
%K 
%R https://doi.org/10.1071/CH9681789
%U https://www.publish.csiro.au/paper/CH9681789 
%X 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. 
