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| Article Name : | | | “TUNGSTOPHOSPHORIC ACID CATALYZED KINETICS OF OXIDATION OF SOME ALIPHATIC ALDEHYDES BY N-BROMOISONICOTINAMIDE (NBIN) IN ACETIC ACID-WATER MEDIUM” | | Author Name : | | | Dinesh Solanki , Dharmendra Dwivedi | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | GRT-5014 | | Article URL : | |  | Author Profile View PDF In browser | | Abstract : | | | Anew oxidant and also an N-halo compound, N-bromoisonicotinamide (NBIN) has been synthesized by the bromination of nicotinamide. N- bromoisonicotinamide was characterized by physical constant (melting point), elemental analysis and spectral studies including infra-red, proton, carbon NMR and mass. Its formal redox potential has been determined as 0.797V at 25ºC. The reaction is first order in [NBIN], zero order in [substrate] and inverse fractional order in [H+]. Increase in ionic strength increases the rate and addition of the reaction product isonicotinamide has a slight retarding effect on the reaction rate. Increase in the dielectric constant of the medium increases the rate. Activation parameters have been evaluated from Arrhenius plot by studying the reaction at different temperatures and oxidation products are identified. A most probable reaction mechanism is proposed and an appropriate rate law is deduced to account for the observed kinetic data. | | Keywords : | | |
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