CH/.PI. Interaction between Benzene and Hydrocarbons Having Six Carbon Atoms in Their Binary Liquid Mixtures

Abstract

Molecular interactions between benzene and hydrocarbons having six carbon atoms, such as hexane, cyclohexane and 1-hexene in their binary liquid mixtures were studied through the measurements of density, viscosity, self-diffusion coefficient, 13 C NMR spin-lattice relaxation time and 1 H NMR chemical shift. CH/p attraction between hexane and benzene in their binary mixture was observed in a relatively benzene rich region, whereas a special attractive interaction was not observed between cyclohexane and benzene. On the other hand, 1-hexene and benzene in their binary mixtures were characteristic in their self-diffusion coefficient behaviors: 1-hexene more strongly attract benzene not only by the CH/p attraction but also probably by the p/p interaction between the double bond in 1-hexene and the p-electron in benzene ring.

Clusters of Imidazolium-Based Ionic Liquid in Benzene Solutions

“…However, the methyl hydrogen atoms are gradually shielded with further increasing x C6H6 from ∼0.8. It is noteworthy that the hydrogen atoms of hexane are gradually shielded in hexane–benzene solutions when the benzene content increases . This implies that the hydrogen atoms of hexane interact with the π electrons of benzene molecules.…”

Viscosity and Diffusivity for the Ionic Liquid 1-Hexyl-3-methyl-imidazolium Bis(trifluoromethylsulfonyl)amide with 1-Octene

“…Literature reports of the self-diffusivity of pure 1-octene are unknown to the authors. However, Kasahara et al report the self-diffusivity of 1-hexene at 40 °C is approximately 500·10 –11 (m 2 ·s –1 ). Smuda et al report the self-diffusivity of n-octane at 20 °C as approximately 230·10 –11 (m 2 ·s –1 ) .…”

Self-Diffusion in Molecular Fluids and Noble Gases: Available Data

“…For higher temperatures and pressures, Weingärtner recommended the data of Krynicky et al in the ranges (343.2 to 498.2) K, (sat to 170) MPa and of Harris and Woolf at (277.15 to 333.15) K and (0.1 to 301.8) MPa. The tracer diffusivities of benzene of Collings and Mills, available from (288.20 to 318.20) K, are also quite used, but they are preferred for “control”, a step which sometimes follows the calibration and consists in measuring the self-diffusion coefficients of other substances whose values are also known in order to ensure the goodness of the calibration step. ,− Occasionally, the control is carried out with benzene at other temperatures and/or pressures, − cyclooctane , and water at different conditions to those of the calibration. , As in Tables and , several authors did not indicate the source or values of the taken standards ,− or the way in which G was determined. In the case of Tofts et al, although the calibration substance is not specified, it is added that the control stage gave values of 11 for water very close to those of Mills.…”

“…Self-diffusion of hexane at saturation/atmospheric pressure as a function of the temperature: open rectangle, Hawlicka and Reimschüssel; ▲, Bachl; ○, Brüsewitz and Weiss; , ●, Kasahara et al; +, Douglass and McCall; ■, Iwahashi et al; ⧫, Vashman and Pronin; △, Harris; ×, Marbach and Hertz; *, Agishev and Emel’yanov; ◊, Panchenkov et al; □, Emel’yanov et al …”