Ion pairing in alkali-metal salts of 1,3-diphenylalkenes. Part II. The determination of equilibrium constants from absorption spectra
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 7,p. 835-840
- https://doi.org/10.1039/p29720000835
Abstract
The existence of contact ion pairs (C) and solvent-separated ion pairs (SS) is well established in solutions of alkalimetal salts of carbanions. We present results for the alkali-metal salts of 1,3-diphenylpropene and 1,3-diphenylbut-1-ene which indicate that two kinds of contact ion pair exist in these systems: a poorly solvated contact ion pair (C1) and a more highly solvated contact ion pair (C2). The thermodynamic parameters ΔH° and ΔS° have been determined, in appropriate cases, for the processes C1→ C2 and C2→ SS.Keywords
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