Study of the thermodynamics of formation of copper (II) complex compounds with n-[(e)-pyridine-2-ilmethylidene]-4h-1,2,4 - triazol- 4 –amine
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ISAC-GUTSUL, Tatiana, PAHOLNITSCAIA, Anastasia, TUTOVAN, Elena, DOROGONCEAN, Constantin. Study of the thermodynamics of formation of copper (II) complex compounds with n-[(e)-pyridine-2-ilmethylidene]-4h-1,2,4 - triazol- 4 –amine. In: Physical Methods in Coordination and Supramolecular Chemistry, 8-9 octombrie 2015, Chişinău. Chisinau, Republic of Moldova: 2015, XVIII, p. 79.
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Physical Methods in Coordination and Supramolecular Chemistry
XVIII, 2015
Conferința ""Physical Methods in Coordination and Supramolecular Chemistry""
Chişinău, Moldova, 8-9 octombrie 2015

Study of the thermodynamics of formation of copper (II) complex compounds with n-[(e)-pyridine-2-ilmethylidene]-4h-1,2,4 - triazol- 4 –amine


Pag. 79-79

Isac-Gutsul Tatiana, Paholnitscaia Anastasia, Tutovan Elena, Dorogoncean Constantin
 
Moldova State University
 
Disponibil în IBN: 21 aprilie 2020


Rezumat

At prezent for the elimination of cationes of some metales from various systems with special properties and in order to maintain these importante ptroperties, more often there are used different ligands. These ligands used in biological and idustrial systems should have the following properties: selectivity, excretion, metabolic integration, etc. For example, copper metabolism disorders lead to some diseases such as Menkes and Wilson diseases. Synthesis of N-[(E)-pyridine-2-ilmethylidene]-4H-1,2,4-triazol-4-amine ligand was realized according to the following scheme:schemeThe complex compound was obtained by mixing of ligand and Cu(NO3)2 aqueous solutions of concentration 0,03 M. Spectrophotometric method was used for the determination of the composition and stability constants of forming complex compounds. There was used the solution of copper nitrate and the exact concentration of copper was determinated by iodometric method. It was established that the maximum of absorption of the complex compound is at  = 700 nm and the value of pH at which the absorbtion is maximal at all wave lenghs is equal to 5,1. By Ostromislensky-Job method it was determinated that the composition of complex compounds of copper with the obtained ligand corresponds to the following ratio of components: Cu(II):L= 1:1 (table I). The value of stability constant of complex compound was determinated by graphical method Bennesi-Hildebrand and by clasic method Komari. Table I. Determination of composition of complex compound CuLtableStability constant of complex compound of copper (II) with N-[(E)-pyridine-2-ilmethylidene]4H-1,2,4-triazol-4-amine in aqueous solution at pH = 5,1 is equal to  = 562.34 l ∙ mol-1.