Acetate and malonate complexes of cobalt(II), nickel(II) and zinc(II) with hydrazinium cation

Abstract

The hydrazinium(1 +) metal acetates and malonate dihydrates of the molecular formula [(N2Hs)2M(CH3COO)4] and (N2H~)2[M(OOCCH2COO)2(H20)2] respectively, where M=Co, Ni or Zn, have been prepared and characterized by chemical analyses, conductance, magnetic, spectral, thermal and X-ray powder diffraction studies. The magnetic moments and electronic spectra indicate that these complexes are of high-spin octahedral variety. The infrared spectra show that the hydrazinium ions are coordinated in the case of acetate complexes, whereas in the malonate complexes the hydrazinium ions are out side the coordination sphere. These complexes undergo exothermic decomposition in the temperature range 150--450~ to give the respective metal oxide as the final residue. The X-ray powder diffraction patterns of the malonate complexes indicate isomorphism among them.

A Novel One-Pot Synthesis, Characterization, DNA Binding and Cleavage Studies on bis(Phenylhydrazoneglyoxylato)diaqua Metal(II) Complexes

“…In the present investigation, novel hydrated phenyl hydrazoneglyoxylate complexes have been synthesized by the aqueous condensation between phenyl hydrazine and glyoxylic acid in the presence of metal(II) ions. In spite of information available on hydrazine based metal carboxylates, few reports are available on phenyl hydrazinium based metal complexes [9][10][11][12]. In view of the above facts, the A Novel One-Pot Synthesis, Characterization, DNA Binding and Cleavage Studies on bis(Phenylhydrazoneglyoxylato)diaqua Metal(II) Complexes present article embodies the spectral and thermal studies on the newly synthesized bis(phenylhydrazone glyoxylato)diaqua metal(II) complexes.…”

Synthesis, Characterization and Antibacterial Studies on Divalent Transition Metal Complexes of Hydrazine With Aryl Substituted Acetic Acids

“…These include simple aliphatic monocarboxylic acid (Ravindranathan and Patil, 1983;Sivasankar and Govindrajan, 1994a;Sivasankar and Govindrajan, 1995a;Sivasankar and Govindrajan, 1997;Vikram and Sivasanka, 2007) aliphatic dicarboxylic acids (Gajapathy et al, 1983;Sivasankar and Govindrajan, 1994b;Yasodhai and Govindrajan, 2000;Sivasankar, 2006) aromatic mono and dicarboxylic acids (Kuppusamy and Govindrajan, 1996;Sivasankar, 2006). Most of these formed as mono, bis-hydrazine or hydrazinium corboxylates and few tris-hydrazine carboxylates are known with aliphatic substituted acetic acid (Kuppusamy and Govindrajan, 1995) and other Inorganic anions (Sivasankar and Govindrajan, 1995;Nicholls et al, 1996).…”

Synthesis and Characterization of Some Hydrazinederivatives With Α, Β Unsaturated Acids

“…Hydrazine complexes of the first row transition metal ions with a variety of carboxylic acids have been reported in the literature (Schmidt, 1984). These include simple aliphatic monocarboxylic acids (Ravindranathan et al, 1983;Sivasankar et al, 1997; aliphatic dicarboxylic acids (Gajapathy et al, 1983;Yasodhai et al, 2000;Govindarajan et al, 1995), aromatic mono and dicarboxylic acids (Kuppusamy et al, 1995 and aliphatic and aromatic hydroxyl acids (Yasadhai et al, 1999;Kuppusamy, et al, 1996), halo acids (Sivasankar et al, 2004), amino acids Sivasankar, 2005) and heterocyclic carboxylic acids (Premkumar et al, 2002). However hydrazine complexes of first row transition metal with unsaturated carboxylic acids are limited except maleate and fumarate derivatives (Govindarajan et al, 1995).…”