Bulletin of Pure & Applied Sciences- Chemistry
  • Year: 2018
  • Volume: 37c
  • Issue: 2

Thermodynamics of Inclusion Complexes in Water α-cyclodextrin-Alkyl Halides Adducts at 303.15, 308.15 and 313.15 K

Dept. of Chemistry, Faculty of Engineering, Teerthanker Mahaveer University, Moradabad, Uttar Pradesh, 244001, India

*Corresponding Author: Atri D. Tripathi, Dept. of Chemistry, Faculty of Engineering, Teerthanker Mahaveer University, Moradabad, Uttar Pradesh, 244001, India, E-mail: atri34tmu@gmail.com

Online published on 21 August, 2018.

Abstract

The interaction in water of tetra ethyl ammonium bromide((C2H5)4N(Br)), tetra propyl ammonium bromide ((CH3CH2CH2)4N(Br))and tetra butyl ammonium bromide ((CH3CH2CH2CH2)4N(Br)) with α-cyclodextrin (α-CD, cyclohexaamylose) (C36H60O30) has been studied calorimetrically at the temperature 303.15, 308.15 and 313.15 K. The values of enthalpy of mixing, Q of two binary aqueous solutions of α-CD with alkyl halides at all temperatures have been fitted by the method of least squares to the equation Q = x1x2[Ao + A1(x2-x1) + A2(x2-x1)2], where x2 refers to the mole fraction of the alkyl halide. The results obtained have been interpreted.

Keywords

Microcalorimeter, α-cyclodextrin, tetra ethyl ammonium bromide, aqueous solutions, enthalpy of mixing