Triarylmethanes and 9??arylxanthenes as prototypes amphihydric compounds for relating the stabilities of cations, anions and radicals by C??H bond cleavage and …

…, RA Flowers, RT Ludwig, AE Meekhof…

Index: Arnett, Edward M.; Flowers II, Robert A.; Ludwig, Richard T.; Meekhof, Alison E.; Walek, Stuart A. Journal of Physical Organic Chemistry, 1997 , vol. 10, # 7 p. 499 - 513

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Citation Number: 36

Abstract

Abstract Thermodynamic stability properties of 11 p-substituted trityl and seven 9- phenylxanthyl carbocations are reported in sulfolane and of their conjugate carbanions in DMSO. The cations are compared by calorimetric heats of hydride transfer from cyanoborohydride ion, their first and second reduction potentials, their pK math image s in aqueous sulfuric acid, 13 C chemical shifts and free energies of methoxy exchange. ...