Structures of nickel(II) and copper(II) complexes of 2-acetylpyridine azacyclothiosemicarbazones

Structural Study of Nickel(II), Copper(II), and Palladium(II) Complexes of 2-Pyridineformamide 3-Hexamethyleneiminylthiosemicarbazone

“…Compared to HAmhexim, which has the bifurcated hydrogen bonded E' structure [14], [Ni(Amhexim)OAc] has a longer S1ϪC17 bond, 1.757(7) Å to 1.732(4) Å and N13ϪC17 is shorter, 1.308(6) Å compared to 1.330(5) Å , but C16ϪN12 is unchanged. These changes are similar to those found for complexes of 2-acetylpyridine 3-hexamethyliminylthiosemicarbazone [22], which also has the bifurcated structure, but considerably smaller than found for the 2-formyl- [1] and 2-benzoylpyridine analogues [3], which have the hydrogen bonded Z conformation.…”

Model based multi-wavelength spectrophotometric method for calculation of formation constants of phenanthrenequinone thiosemicarbazone complexes with some metallic cations

“…The ligand phenanthrenequinone thiosemicarbazone (PQTSC), was synthesized according to previously published procedures [26][27][28] . The reactants for synthesis of PQTSC, 9, 10-phenanthrenequinone (PQ) and thiosemicarbazide, were purchased from Merck with the highest purity available and used without further purification.…”

Synthesis, physico-chemical studies of manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) complexes with some p-substituted acetophenone benzoylhydrazones and their antimicrobial activity

“…It has already been proven that the octahedral field energy level sequence for a d n configuration is the same as the tetrahedral field energy level sequence for the d 102n configuration. It follows therefore that for a d 5 ion, which is its own hole equivalent, the same energy level diagram may be used for octahedral or tetrahedral fields. IR spectra (Table III) The ligands Hpabh and Hpcbh show a broad band in the region 3290 and 3282 cm 21 respectively, due to v(NH/NH 2 ).…”

“…Such complexes with different oxidation states have a strong role in bioinorganic chemistry and redox enzyme systems [2,3] and may provide the basis of models for active sites of biological systems [4,5] or act as catalysts [6 -8].…”