Solvent Effect on the Dimerization of Tetracyanoquinodimethane Anion Radical
- 1 November 1975
- journal article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 48 (11) , 3391-3392
- https://doi.org/10.1246/bcsj.48.3391
Abstract
The thermodynamic quantities of the dimerization of tetracyanoquinodimethane (TCNQ) anion radical in water–ethanol mixtures were determined. The free energy of dimerization −ΔG showed a monotone decrease with an increase in ethanol content, whereas the enthalpy and the entropy of dimerization, −ΔH and −ΔS, showed a maximum. This unusual behavior is explained by proposing a solvation model in which the water molecules are attracted more strongly around the TCNQ− dimer than are the ethanol molecules. The entropy was found to play an important role in the dimerization.This publication has 8 references indexed in Scilit:
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