Enthalpy-related interaction parameters in H/D isotopically distinguishable aqueous solutions of tetramethylurea cyclic derivatives at 298.15 K

被引：24

作者：

Ivanov, Evgeniy V. ^{[1
]}

Batov, Dmitriy V. ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Solut Chem, Lab Thermodynam Solut Nonelectrolytes & Biol Act, Ivanovo 153045, Russia

[2] Russian Acad Sci, Inst Solut Chem, Inc Phys & Chem Ctr Solut Res, Ivanovo 153045, Russia

来源：

THERMOCHIMICA ACTA | 2011年 / 523卷 / 1-2期

关键词：

Enthalpies of dilution; Enthalpy-related interaction parameters; 1,1,3,3-Tetramethylurea; 1,3-Dimethylethyleneurea; 1,3-Dimethylpropyleneurea; 2,4,6,8-Tetramethyl-bis-urea; Ordinary and heavy water; EXCESS MOLAR VOLUMES; HEAVY-WATER; TEMPERATURE; HYDRATION; MIXTURES; UREA; 1,3-DIMETHYLPROPYLENEUREA; MEBICARUM; PRESSURE; BEHAVIOR;

D O I：

10.1016/j.tca.2011.05.019

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The enthalpies for dilution of solutions of 1,1,3,3-tetramethylurea (TMU), 1,3-dimethylethyleneurea (DMEU), 1,3-dimethylpropyleneurea (DMPU) and 2,4,6,8-tetramethyl-bis-urea (TMbU) in ordinary (H2O) and heavy (D2O) water were measured calorimetrically at 298.15 K. The enthalpy coefficients for pair (h(22)) and triplet (h(222)) interactions between hydrated solute molecules were estimated using the McMillan-Mayer formalism. The quantities of h(22) as well as the corresponding solvent isotope effects were found to be positive for aqueous TMU, DMPU and DMEU and negative for aqueous TMbU. The correlation between h(22) and standard enthalpies of solution of these compounds in H2O and D2O was established at the temperature in question. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：253 / 257

页数：5

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