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Introduction Owing to their catalytic properties, among others, copper(II) complexes with amino acids, peptides, and proteins have attracted the attention of many research teams [ 1 – 6 ]. Peptides have been known to act as

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Journal of Thermal Analysis and Calorimetry
Authors: Aliakbar Dehno Khalaji, Sepideh Maghsodlou Rad, Gholamhossein Grivani, and Debasis Das

Introduction A large number of nickel(II) and copper(II) complexes with salicylaldehyde Schiff-base ligands have been extensively studied for their interesting structural [ 1 – 7 ] application and properties [ 8 – 14

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carbaryl (insecticide) was supplied by the courtesy of the Environmental Protection Agency (EPA), NC, USA. Its copper(II) and zinc(II) complexes, viz. M(1-Naph- N -Mecbm) 4 X 2 (M = Cu, X = Cl, NO 3 and CH 3 COO and M = Zn, X = Cl) were obtained by the

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Introduction Copper(II) and nickel(II) reacts with tetraglycine (G 4 ) in alkaline medium to form complexes, in which three peptide hydrogens are ionized [ 1 , 2 ] to yield Cu II (H −3 G 4 ) 2− and Ni II (H −3 G 4 ) 2− . From

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Introduction Thermal decomposition and dehydration of metal acetates have been studied broadly under various conditions [ 1 – 20 ]. As a typical and widely applied metal acetate, the thermal decomposition of copper(II) acetate

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Abstract  

Isotope exchange of copper/II/ between bis/resacetophenone phenylhydrazone/ copper/II/ complex and copper/II/ in trin-butyl phosphate and methanol medium was studied. The experiments were carried out at different temperatures varying the concentration of both metal ion and the complex. The results show that the complex is kinetically labile. An increase in temperature increases the rate of isotope exchange. The increase in concentration also results in the enhancement of the rate of reaction.

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materials are likely to contain additives such as wood preservatives, coatings, and fire-retardants. Wood preservatives contain metal oxides that can generally act as a catalyst [ 1 – 4 ]. Copper(II) oxide (CuO) is a major component of wood preservatives and

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Abstract  

Isotope exchange behavior of bis(resacetophenone oxime)copper(II) complex with copper(II) in tri-n-butyl-phosphate and methanol medium has been studied. The studies were carried out at different temperatures varying the concentration of both metal ion and complex. The results show that the complex is labile in the kinetic sense. Increase in temperature increases the isotope exchange rate. The increase in concentration also results in enhancement of the rate of reaction.

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non electrolytic counterparts. Experimental All the chemicals and solvents used were of reagent grade. Ciprofloxacin hydrochloride (CFLH) was purchased from Bayer AG (Wuppertal, Germany). Copper(II) chloride dihydrate, p

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The thermal dehydration and decomposition of copper(II) phthalate monohydrate was studied by isothermal and non-isothermal methods. The decomposition process consisted of three steps: two steps of dehydration and the third of decomposition. The kinetics of isothermal dehydration reactions follow (i) a unimolecular law up to the formation of copper(II) phthalate hemihydrate, and (ii) a phase boundary model giving anhydrous copper(II) phthalate, while the kinetics of isothermal decomposition reaction comply with the Erofeev-Avrami equation, [−ln(1−α)]1/n=Kt+C. The energies of activation for the formation of the decomposition products were calculated. The decomposition products were characterized by elemental analysis, photomicrographic observations, infrared and reflectance spectra and X-ray powder diffraction data.

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