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Relative Gas-phase Acidities of Fluoro- and Chlorobenzene

✍ Scribed by Andrade, Paula B. M.; Riveros, José M.

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
388 KB
Volume
31
Category
Article
ISSN
1076-5174

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✦ Synopsis

The gas-phase equilibrium reaction between fluorobenzene and chlorobenzene and their conjugate bases was studied by Fourier transform ion cyclotron resonance spectrometry in order to reconcile conflicting experimental results obtained using different techniques. The results of a large number of measurements yield equilibrium constants which show chlorobenzene to be more acidic than Buorobenzene by 0.55 f 0.15 kcal mol-' ( h e at 330 K). Different control experiments were carried out to ensure that the measured equilibrium constants reflect adequately the thermal distribution of the different isomeric halophenide ions.

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