Coordination compounds of hydrazine derivatives with transition metals. XIV. Nickel(II) chelates with bidentate aroylhydrazones and their reactions with heterocyclic bases
1977; Elsevier BV; Volume: 22; Linguagem: Inglês
10.1016/s0020-1693(00)90911-3
ISSN1873-3255
AutoresMagdi F. Iskander, Salah Saddeck,
Tópico(s)Crystal structures of chemical compounds
ResumoBoth cationic and neutral bis(ligand)nickel(II) chelates derived from some bidentate aroylhydrazones have been prepared and characterized. Whatever the solubility permits, the reaction of the neutral bis-(ligand)chelates, NiL2, with some heterocyclic bases were studied spectrophotometrically in benzene solution. The stability constants as well as the thermodynamic parameters (ΔG, ΔH, ΔS) for the adduct formation reaction have been measured. Stable solid mono-, bis- and tetrapyridinate adducts have been isolated from the crystallization of neutral bis(ligand) chelates from pyridine solutions.
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