If the solvent is able to solvate both anions and cations and has dielectric constant D [greater than or equal to] 40 (water, formamide), only the equilibrium described by the overall constant [K.sub.a] (Eq.
In solvents with a low D that also lack the ability to solvate ions (hydrocarbons, halohydrocarbons) the interaction does not go beyond the initial hydrogen bond or contact ion pair formation.
It has low basicity and very low ability to solvate anions .
The powder diffraction pattern was indexed giving a unit cell and space group consistent with one molecule in the asymmetric unit (unlike the solvate structures with multiple parent, and often multiple solvate molecules in the asymmetric unit).
The crystal structure of 5-bromonicotinic acid differs significantly from the solvate structures.
It is the only way to explain the decrease in [log.sub.10][K.sub.1] as the amount of ethanol in the media is increased since [L.sup.-] is expected to solvate more than [HL.sup.[+ or -]] in media rich in ethanol.
This is the only way which explains the decrease in [log.sub.10][K.sub.1] as the amount of ethanol in the media is increased because [L.sup.-] is expected to solvate more than the zwitterionic form of dipeptides in the media rich in ethanol.
Since ethanol would solvate L better than [LH.sup.+], the log[beta] values, which are related to the formation of [LH.sup.+], would decrease upon addition of ethanol.