Thermal decomposition studies on cobalt(II) complexes of 4-N-(4?-antipyrylmethylidene)aminoantipyrine with varying counter ions

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

“…There is no definite trend either in the values of A or in exponential values of Δ S among the different stages of decomposition in the present series. The fact that the activation energy for the second stage is greater than that of the first stage may be due to the less steric strain occurring at that stage 10,11. However, the negative values of entropy of activation indicate that the activated complex has a more ordered structure than the reactants 8–11.…”

“…Hence, the mechanism of decomposition is random nucleation with one nucleus on each particle. This represents the Mampel model 18–11,13,14.…”

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) …”