1Dept. of Chemistry, Faculty of Engineering, Teerthanker Mahaveer University, Moradabad, Uttar Pradesh, 224001, India.
2Work done at: Dept. of Chemistry, Panjab University, Chandigarh-160014, India.
*Corresponding Author Atri D. Tripathi, Dept. of Chemistry, Faculty of Engineering, Teerthanker Mahaveer University, Moradabad, Uttar Pradesh, 224001, India. E-mail: atri34tmu@gmail.com
The interaction in water of tetra ethyl ammonium bromide ((C2H5)4N(Br)), tetra propyl ammonium bromide ((CH3CH2CH2)4N(Br)) and tetrabutylammonium bromide ((CH3CH2CH2CH2)4N(Br)) with p-cyclodextrin (β-CD, cyclomaltose) (C42H70O35) for dilute solutions has been studied calorimetrically at the temperature 303.15 and 313.15 K. The values of enthalpy of mixing, Q, of two binary aqueous solutions of β-CD with alkyl halides at all temperatures have been fltted by the method of least squares to the equatlon Q = X1X2 [A0 + A1(x2-X1) + A2(x2-X1)2+ A3(x2-X1)3], where X2 refers to the mole fraction of the alkyl halide. The results obtained have been interpreted in terms of host-guest interaction.
β-cyclodextrin, Tetra ethyl ammonium bromide, Calorimetry, Host-guest complex, Enthalpy of mixing, Hydrophobic cavity
