Thermolytic investigations on nickel(II) complexes of 4‐N‐(4′‐antipyrylmethylidene)aminoantipyrine with various counterions

Abstract

Phenomenological characteristics and kinetic and mechanistic aspects of the thermal decomposition of nitrate, chloride, bromide, and iodide complexes of nickel(II) with 4-N-(4 -antipyrylmethylidene)aminoantipyrine have been studied using thermogravimetric (TG) and differential thermogravimetric (DTG) techniques. Kinetic parameters such as activation energy, preexponential factor, and entropy of activation were quantified. The rate-controlling process in all stages of decomposition was found to be based on random nucleation with one nucleus on each particle according to the Mampel model.

Kinetics on Thermal Decomposition of Iron(III) Complexes of 1,2-Bis(Imino-4’-Antipyrinyl)Ethane with Varying Counter Anions

“…This variation could be due to the effect of counter anions on the thermal decomposition of the complexes. Hence, herein we report that the counter anions play an important role on the thermal decomposition kinetic parameters of the complexes and this result was found in line with our previous reports[2] [11] [12][13].…”

A Literature Review on Antipyrinein Chemistry Fields

“…By this discovery, initiated the beginning of the German drug production and industry. It is now used as relief of many forms (31)(32)(33)(34)(35)(36)(37)(38)(39)(40) of arthritis in which capacity it has more than an analgesic action in that it also decreases swelling and spasm through an antiinflammatory action.…”

Thermal Decomposition Studies on Iron(III) Complexes of 1,2-Bis(imino-4’-antipyrinyl) ethane with Varying Counter Ions

“…Among the five complexes, the complex with nitrate as a counter ion is the least stable and the one with bromide as a counter ion is the most stable. The variation in the thermal stability proves that the counter anions play a major role on the thermal decomposition nature of the complexes [8][9][10][11][12], which can be brought in the following order: Bromide > Chloride > Thiocyanate > Perchlorate > Nitrate…”

“…However, only little is known about the thermal behaviour of such complexes [6,7]. In relation to this and as the thermal studies of Schiff base-metal complexes is a part of our continuing interest [8][9][10][11][12], here, the phenomenological and mechanistic characteristics of five iron(III) complexes of an antipyrine Schiff base derivative, namely 1,2-bis(imino-4'-antipyrinyl)ethane (GA), having the empirical formula C 24 H 24 N 6 O 2 with varying counter anions (perchlorate, nitrate, thiocyanate,chloride and bromide), are reported.…”

“…• Page 4 of 4 • Volume 1 • Issue 1 • 1000103 the highest value of the correlation coefficient obtained for all welldefined stages corresponds to the "Mampel model"[7][8][9][10][11][12], which is g(α) = -ln(1-α) …”