Conformation Equilibrium of 1,2-Dichloroethane as a Probe for Solvent Properties of Liquid and Supercritical CO_2
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Gibbs-energy difference between the gauche and trans isomers of 1,2-dichloroethane (DCE) in liquid and supercritical (SC) CO<SUB>2</SUB> was investigated using Raman spectroscopy. The gauche isomer was relatively stabilized in these solvents compared with in non-polar organic solvents. This was attributed to the interaction of the dipolar gauche isomer with the quadrupole moment of the CO<SUB>2</SUB> molecule, as well as the local density enhancement in SC CO<SUB>2</SUB>. Conformation equilibrium of DCE was suggested to be useful as a probe for studying solvent properties of SC fluids.
- Chemistry Letters
Chemistry Letters 36(9), 1126-1127, 2007-09-05
The Chemical Society of Japan