𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Template mechanism and kinetics for the complexation of ninhydrin with copper (II) complexes of asparagine and serine

✍ Scribed by Zaheer Khan; A. A. Hashmi; Tabrez A. Khan; M. M. Haq

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
315 KB
Volume
28
Category
Article
ISSN
0538-8066

No coin nor oath required. For personal study only.

✦ Synopsis

Ninhydrin has been found to form a I I complex with C u ( l l ) complexes of asparagine and serine The kinetics of the complexation reaction has been studied spectrophotometrically in acetate buffer. The effect of the [ninhydrinl, pH, and temperature on the reaction rate of the reaction was studied. The reaction follows fractional-order kinetics with respect to ninhydrin and first-order with respect to asparagine-Culll) and serine-Cu( 11). respectively. The reaction proceeds through the coordination of ninhydrin with the same Cu(l1) of asparagine and serine complexes The results are best accounted by the "Template mechanism" for the inner sphere complexation. The values for the inner sphere complex formation constant were also calculated from the kinetic data The role of Cu(1l) in this reaction is to inhibit the breaking of C-C [evolution of CO,) as well as stabilize the C=N of Schiff base On the basis of observed results, probable mechanism has been proposed.

πŸ“œ SIMILAR VOLUMES

Kinetics of the interaction of ninhydrin
Kinetics of the interaction of ninhydrin with the [Ni(II)–histidine]+ complex in water and surfactant micelles
✍ Kabir-Ud-Din; Mohd. Akram; Mohammad Z. A. Rafiquee; Zaheer Khan πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 170 KB πŸ‘ 2 views

Kinetics of the condensation reaction of ninhydrin and the [Ni(II)-histidine] Ο© complex has been studied spectrophotometrically at pH 5.0, both in aqueous and aqueouscationic micelles of cetyltrimethylammonium bromide (CTAB). The same product was obtained in both the media. The results obtained in t

Kinetics of the interaction of Cd(II)-hi
Kinetics of the interaction of Cd(II)-histidine complex with ninhydrin in absence and presence of cationic and anionic micelles
✍ Z. A. Rafiquee; Rayees Ahmad Shah; Kabir- Ud-Din; Zaheer Khan πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 105 KB πŸ‘ 2 views

Kinetics of the interaction of Cd(II)-histidine complex with ninhydrin has been carried out at pH 5.02 (acetic acid-sodium acetate buffer) under varying conditions of reactant concentrations, temperature, and surfactant concentrations. The order of the reaction with respect to Cd(II)-histidine compl

Micellar effects on the rates of the con
Micellar effects on the rates of the condensation reaction between copper(II)-histidine complex and ninhydrin
✍ Kabir-ud-Din; M. Akram; Md. Z. A. Rafiquee; Z. Khan πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 154 KB πŸ‘ 2 views

The kinetics of formation of N-diketohydrindylidenehistidinatocopper(II) complex has been investigated in the presence of cationic cetyltrimethylammonium bromide (CTAB) surfactant in aqueous medium (pH Ο­ 5.0). Similarly in aqueous solution, the reaction followed irreversible first-order kinetics wit

Kinetics and Mechanisms of the Reactions
Kinetics and Mechanisms of the Reactions of Ο€-Allylpalladium Complexes with Nucleophiles
✍ Oliver Kuhn; Herbert Mayr πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 133 KB πŸ‘ 1 views

Which nucleophiles are capable of attacking the allyl ligand of the Pd-stabilized allyl cation 1? This question is answered by the electrophilicity parameter of 1 which is derived from kinetic investigations.