Correlation between temperature coefficients of Ag+L cryptate stability constant and of As vertical bar Ag+ electrode potential

The temperature coefficients, dlogK/dT: of the stability constants of Ag+ c omplexes with cryptands 221 and 222 were obtained directly from van't Hoff linear plots logK = a + bT(-1) in 10 aprotic solvents: acetone, acetonitril e, propanenitrile, butyronitrile, benzonitrile, N,N-dimethylacetamide, N,N- dimethylformamide, dimethylsulfoxide, propylene carbonate and in tetramethy lene sulphone (sulfolane). It has been shown, that while the stability cons tants of the Ag(+)221 and Ag(+)222 cryptates can be correlated with the pot entials E of the Ag\Ag+ couple as logK = const. + (F/2.3RT)E, the correspon ding relation between the temperature coefficients is dlogK/dT = const.' - (F/2.3RT)(E/T + dE/dT).