1981
DOI: 10.1021/j150609a028
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Amide interactions in aqueous and organic medium

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Cited by 74 publications
(36 citation statements)
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“…The fact that this process is exothermic has been interpreted as a consequence of hydrogen bond formation between the carbonilic oxygen of the amide and the molecules of water [23], which have been confirmed by Raman spectroscopy [24]. Calculations on the water-water and water-amide interaction energy have shown that hydrogen bonds between water and amides are stronger than between water molecules [25]. Results for the excess enthalpy as a function of the water mole fraction obtained in the present work are compared with experimental data in Figure 1.…”
Section: Energeticmentioning
confidence: 84%
“…The fact that this process is exothermic has been interpreted as a consequence of hydrogen bond formation between the carbonilic oxygen of the amide and the molecules of water [23], which have been confirmed by Raman spectroscopy [24]. Calculations on the water-water and water-amide interaction energy have shown that hydrogen bonds between water and amides are stronger than between water molecules [25]. Results for the excess enthalpy as a function of the water mole fraction obtained in the present work are compared with experimental data in Figure 1.…”
Section: Energeticmentioning
confidence: 84%
“…The enthalpy of hydrogen bond fomiation, AHHB, may then be calculated from where AH,^ and &isM are the enthalpies of solution of the acid and model compounds; McA and AHcM are the cavity formation terms for the pure base; AHcA and AHcM' are the cavity terms for the reference solvent; AHiA and AHiM are the interaction terms due to dipolarand van der Waals forces for the pure base; and AHiA' and AHiM' are the corresponding terms for the reference solvent. A complete discussion of this method has been previously reported (6,7).…”
Section: Methodsmentioning
confidence: 99%
“…In particular, Somsen and co-workers (3)(4)(5) have studied the thermodynamic enthalpies of aqueous solutions of urea and methyl-substituted ureas. We have made additional calorimetric measurements on these ureas and have applied a previously developed model (6) to provide more detailed information on the first solvation sphere of dilute solutions of urea in DMF and water.…”
Section: Introductionmentioning
confidence: 99%
“…The calorimeters and methods of analysis have been previously described (2,3). Purifications of water and methanol have been reported (I).…”
Section: Methodsmentioning
confidence: 99%