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Kinetic Study of SN2 Reaction between Paranitrophenyl Benzoate and Hydrazine in the Presence of CTAB Reverse Micelles

1Department of PNCO, School of Chemistry, Andhra University, Visakhapatnam, 530017, Andhra Pradesh, India

2Department of Chemistry, Gayatri Vidya Parishad College of Engineering (Autonomous), Visakhapatnam, 530048, Andhra Pradesh, India

Received: 20 May 2021; Revised: 3 Aug 2021; Accepted: 3 Aug 2021; Available online: 14 Aug 2021; Published: 20 Dec 2021.
Editor(s): Istadi Istadi
Open Access Copyright (c) 2021 by Authors, Published by BCREC Group
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Kinetic study of the reaction between p-Nitrophenyl benzoate (PNPB) by hydrazine (HYN) in the presence of Cetyltrimethylammonium bromide (CTAB)/Chloroform/Hexane reverse micellar medium shows that the reaction obeys first order kinetics with respect to each of the reactants. The rate of the reaction is much slower in reverse micellar medium compared to aqueous medium under identical conditions (kˈAq = 2.84×103 sec1, krm =1.34×104 sec1). The rate constants for the reaction in the reverse micellar medium have been determined at different values of W {W=[H2O]/[CTAB]} and at different concentrations of CTAB. It was found that the observed rate constant decreases with W. This kinetic behaviour was interpreted by using modified Berezin pseudo phase model, taking into consideration the distribution of the reactants, PNPB and hydrazine between the three pseudo phases, i.e., water pool, interface an organic phase. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (


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Keywords: CTAB reverse micelles, Hydrazine, Kinetics, p-Nitrophenyl benzoate, Water pools
Funding: Ministry of Earth Sciences (MOES), National Center for Coastal Research (NCCR), India under contract MOES/ICMAM-PD/Supply. Order/81/2017

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