Journal
RUSSIAN CHEMICAL BULLETIN
Volume 58, Issue 1, Pages 21-24Publisher
SPRINGER
DOI: 10.1007/s11172-009-0003-9
Keywords
retro-Diels-Alder reaction; kinetic parameters
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Funding
- Russian Foundation for Basic Research [08-03-00219]
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The temperature and pressure effects on the decay rate of an adduct obtained from 9-chloroanthracene and tetracyanoethene by a Diels-Alder reaction were studied. The rate constants (298.2 K) and the enthalpies, entropies, and volumes of activation were determined for the retro-Diels-Alder reaction in different solvents. The data obtained confirm a possible decrease in the molar volume of the solvated adduct upon partial bond cleavage on the way to the transition state. The reversal of the sign in front of the activation volume cannot be indicative of a changed reaction mechanism.
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