Enthalpies of transfer of some non-electrolytes from acetonitrile to acetonitrile–methanol mixtures

Solvation of solutes with S=O or C=O groups in the methanol–acetonitrile solvent system: A combined calorimetric and spectroscopic study

“…In comparison, the (an ] bN) values for alcohols in these solvent systems are close to unity. 23 The relatively large (an ] bN) is consistent with some weakening of the solventÈsolvent hydrogen bonds as a result of the formation of the additional soluteÈsolvent hydrogen bond.…”

“…The model parameters recovered are listed in Table 4 along with parameters for several other solutes in these solvent systems. 23 In an earlier study of solvation in acetonitrileÈmethanol mixtures23 we found that the model parameters were essentially independent of the size of the non-polar alkyl groups. Thus the parameters recovered refer principally to the solva- Fundamentally the extended coordination model, which underlies eqn.…”

Preferential Solvation of Organic Species in Binary Solvent Mixtures Probed by Intermolecular1H NOESY NMR Spectroscopy

“…PS has been investigated with a wide variety of experimental methods (electrochemical [10] and thermodynamic [11] measurements, solvatochromic effects on UV/Vis or fluorescence spectra, [12±15] circular dichroism, [16] IR, [11c, 17±19] and NMR [chemical shift [20] or line-width [21] measurements]) and with theoretical methods (semiempirical [22] or Monte Carlo [23] calculations on simple solvation models, and molecular dynamics simulations [24±26] ). The relationship between PS and the microscopic characteristics of the solvation shell has been described by means of various theoretical models, such as the stepwise solvent exchange, [27,28] competitive preferential solvation, [29] and quasi-lattice quasi-chemical [30] theories, and preferential solvation isotherms.…”

A Thermodynamic Study on the Binding of Cobalt Ion with Myelin Basic Protein

“…This treatment leads to: (1) for the enthalpy of transfer. [42][43][44][45][46][47][48][49][50][51][52][53] is the enthalpy of transfer from pure solvent A to pure solvent B. and are the local mole fractions of the components A and B in the solvation sphere, where the solvent molecules are the nearest neighbours of the solute, which can be expressed as follow: ,…”

“…(1) involves the approximation of constant values for α, β, n, N and (αn + βN) over the whole range of solvent compositions. [42][43][44][45][46][47][48][49][50][51][52][53] As the parameters α, β, n, N and (αn + βN) are not constant over the whole range of solvent compositions and the net effect of the solute on solvent-solvent bonds in…”