Refractive Indices of Aqueous Solutions of Isomeric Butylamines at 303.15 K: Experimental and Correlative Approach

Abstract

Refractive indices () and densities (r) of water (W) + n-butylamine (NBA), + sec-butylamine (SBA) and + tert-butylamine (TBA) systems had been measured in the whole range of composition at 303.15 K, from which deviation in refractive index (DnD ) molar refraction (Rm) and excess molar refraction () had been evaluated. All of the derived properties were fitted to appropriate polynomials. DnD were fitted to the Redlich-Kister polynomial equation. Values of DnD were all positive and were all negative which were attributed to cross hydrogen bonding, specific interactions as well as interstitial accommodation effect. A comparative study of Lorentz-Lorenz (L-L), Weiner (W), Heller (H), Gladstone-Dale (G-D), Arago-Biot (A-B), Eykman (Eyk), Newton (Nw), Eyring-John (E-J) and Oster (Os) relations for determining the refractive index of a liquid had been carried out to test their validity for the three binaries over the entire mole fraction range of butylamines at 303.15 K.

Sound Velocities in Aqueous Solutions of n-Butylamine between 303.15 and 323.15 K: Experiment and Theory

“…Earlier, we reported excess molar volumes, viscosities, and refractive index of aqueous solutions of isomeric butylamines [14][15][16]. In the present communication, we are reporting some results related to sound velocities of W+NBA system in terms of experimental and theoretical approaches along with various acoustic and thermodynamic parameters.…”

Viscosities, Free Energies of Activation and their Excess Properties in the Binary Mixtures of Some Monoalkanolamines with Acetonitrile between 303.15 and 323.15 K: Experimental and Correlative Approach

“…This report is a continuation of our systematic study on thermodynamic, optical and transport properties of binary mixtures of organic liquids including alkanols, amines, alkanolamines, etc. in aqueous and non-aqueous media [31][32][33][34][35][36][37][38][39][40]. We have reported densities, excess molar volumes, apparent molar volumes, partial molar volumes, thermal expansivities and their excess and/or deviation properties of alkanolamine in aqueous media [27].…”