Refractive Properties of Binary Mixtures of 1,4-Butanediol with Methylpyridine Isomers
Keywords:
-1,4-Butanediol, Refractive Index, Picoline, Binary System, Refractive Index Mixing RulesAbstract
Refractive indices, nD, and densities,, have been measured for 1,4-butanediol (1,4-BD) + α-picoline/ β-picoline/ γ-picoline binary mixtures over the entire composition range at T = ( 303.15, 308.15, 313.15 and 318.15) K. Some empirical and theoretical relationships like, Arago-Biot (A-B), Eykman (E), Eyring and John (E-J), Gladstone-Dale (G-D), Heller (H), Lorentz-Lorenz (L-L), Newton (N), Oster (Os) and Weiner (W) have been applied to study the dependence of the measured and derived quantities on temperature and on binary composition. Furthermore, refractive index deviation, ∆nD, molar refraction, R, and molar refraction deviation, ∆R have been calculated. Results have been fitted to Redlich-Kister polynomial equation to obtain the adjustable parameters and standard deviations between the measured and fitted values, respectively. The results are discussed briefly.
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