The present study reports the measurements of permittivity, the refractive index, and density of eight polar binary systems containing four primary alkanediols (C₂–C₅) and two saturated and unsaturated cyclic ketones (cyclohexanone and isophorone) over the full composition range at T = 298.15 K and p = 0.1 MPa. Despite strong structural similarity of the cyclic ketones, isophorone molecules differ by a keto group conjugated with a C═C double bond. The chosen primary alkanediols were 1,2-ethanediol, 1,3-propanediols, 1,4-butanediol, and 1,5-pentanediol, all containing two hydroxyl groups on the end of carbon skeletons. In this study, the role of intermolecular interactions and the constituent molecular structures on the dielectric, optical, volumetric, and structural properties of the binary liquid mixtures (cyclic ketones + alkanediols) were studied and analyzed with various approaches. The excess properties of different physical quantities confirm the formation of hydrogen-bonded structures in these mixtures. Negative excess permittivities were obtained for the studied systems, indicating a reduction of the number of effective dipoles in the binary mixtures.

中文翻译：

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环酮和链烷二醇（C ₂ -C ₅）的几种二元体系的理化及相关过剩性质的系统研究

本研究报告了在T的整个组成范围内，包含四个伯链烷二醇（C ₂ -C ₅）和两个饱和和不饱和环状酮（环己酮和异佛尔酮）的八个极性二元体系的介电常数，折射率和密度的测量值。= 298.15 K和p＝ 0.1MPa。尽管环状酮的结构相似性很强，但异佛尔酮分子的区别在于与C withC双键共轭的酮基。选择的伯链烷二醇是1,2-乙二醇，1,3-丙二醇，1,4-丁二醇和1,5-戊二醇，它们都在碳骨架的末端均含有两个羟基。在这项研究中，分子间的相互作用和组成分子结构对介电，光学，体积和结构性质的二元液体混合物（环酮+链烷二醇）的作用进行了研究，并用各种方法进行了分析。不同物理量的过量特性证实了在这些混合物中形成了氢键结构。研究系统获得了负的超介电常数，