IJSR - International Journal of Scientific Research

Swarn Lata Bansal; Sanjay Asthana

Volume : VI, Issue : XI, November - 2017

Comparative study on oxidation of Maltose and Sucrose by [Cu(Bip)2]2+ in alkaline medium

Swarn Lata Bansal, Sanjay Asthana

Abstract :

The kinetic study of Maltose and Sucrose by [Cu (Bip)₂]²⁺ in alkaline medium has been investigated spectrophotometrically at λ max 380 & 430 nm under pseudo first order condition. The above said investigation of Maltose and Sucrose shows a first order dependence on reducing sugars and hydroxyl ions at their low conc. but tends towords zero order at their higher concentration and follow zero order kinetics w.r.t Cu (II). The rate determining step involves the reaction between hydroxyl ions and reducing sugars leading to intermediate diole active products. A mechanism that involves the formation of an intermediate enediole anion has been proposed for the oxidation of substrate. In the present condition, these substrates are also oxidised with [Cu(Bip)₂]²⁺ itself. The empirical rate law, in terms of disappearance of [Cu(Bip)₂]²⁺ might be proposed.

–d[Cu] = k₁[S][OH] dt

Where k₁ is observed first order rate constant in [Cu(Bip)₂]²⁺ depending upon the conc. of substrate and hydroxyl ions.

Reducing sugars including (Maltose and Sucrose) are multifunctionality naturally occurring materials, the oxidation products of which play a key role as intermediates for the synthesis of more complex molecules and also display biological activities.