Standard Volumetric Properties of Tetra-N-ethylglycoluril (Bicaret) in Ordinary and Heavy Water at Temperatures from (278.15 to 318.15) K and Ambient Pressure

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• 作者：Evgeniy V. Ivanov ; Elena Yu. Lebedeva ; Vladimir K. Abrosimov
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2015
• 出版时间：July 9, 2015
• 年：2015
• 卷：60
• 期：7
• 页码：2079-2089
• 全文大小：403K
• ISSN：1520-5134

文摘

The densities of solutions of bicaret (2,4,6,8-tetraethyl-2,4,6,8-tatraazabicyclo[3.3.0]octane-3,7-dione or tetra-N-ethylglycoluril) in ordinary (H₂O) and heavy (D₂O) water were measured using the Anton Paar DMA 5000 M high-precision vibrating tube densimeter. All experiments were carried out between 278.15 K and 318.15 K at pressure to be ca. 0.1 MPa. The solution molality ranged from approximately (0.01 to 0.2) mol路(kg of solvent)^鈭? for each of H/D isotopically distinguishable systems compared. The temperature-dependent apparent molar volumes as well as expansibilities (down to infinite dilution) of the solute were derived from density data. The behavior of D₂O鈥揌₂O solvent isotope effects on the considered quantities was described taking into account the structural features of H₂O and D₂O media. The obvious relationship between D₂O鈥揌₂O solvent isotope effects on the standard molar volume of bicaret and standard molar enthalpy of its dissolution in water was discovered. One of the points of this work is a comparison of the obtained volumetric characteristics with those for tetra-N-methylglycoluril (mebicar), using the previous data.