Synthesis and thermal studies on iron(III) 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

“…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][9][10][11].…”

“…Antipyrine and its derivatives possess interesting pharmacological properties [1,2], but comparatively little is known about complexes of antipyrine derivatives with 3d-metal ions [3][4][5][6][7], especially their thermal behavior [8,9]. In view of this, and as part of our contin- uing interest in thermal [8][9][10][11] aspects of antipyrine derivatives, here we report thermal studies of a new series of nickel(II) complexes of a Schiff base antipyrine ligand with a variety of counterions such as nitrate, chloride, bromide, and iodide.…”

“…In view of this, and as part of our contin- uing interest in thermal [8][9][10][11] aspects of antipyrine derivatives, here we report thermal studies of a new series of nickel(II) complexes of a Schiff base antipyrine ligand with a variety of counterions such as nitrate, chloride, bromide, and iodide. Thermogravimetric (TG) data indicate that even though the anions are not involved in coordination, they have some marked influence on the thermal characteristics of the complexes.…”

Copper(II) complexes of hydroxyflavone derivatives as potential bioactive molecule to combat antioxidants: synthesis, characterization and pharmacological activities

“…[10] Antipyrine and its derivatives possess antibacterial and antitumour activities. [11] New kinds of chemo-therapeutic agents containing Schiff bases have gained significant attention among biochemists and, of those, aminopyrines are commonly administered intravenously to detect liver disease in clinical treatment. [12] 2-Aminothiazoles are a remarkably versatile group of compounds that have found applications in drug development.…”

Análise da estabilidade oxidativa por termogravimetria (TGA) do sebo bovino e óleo visceral de Tilápia para produção de biodiesel de 2º geração

“…Os parâmetros termodinâmicos foram encontrados utilizando equações matemáticas assim como Faria e Prado (2007) fizeram para estudar a degradação térmica de celulose: Equação 2 (Madhu, 2003), equação 3 (Gabal, 2003) …”