Thermal and Spectroscopic Studies Of Divalent Transition Metal Hydrazine Complexes With 2-Naphthoxy Acetic Acid

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Arunadevi, N ; Vairam, S (2012)
  • Publisher: Journal of Engineering Computers & Applied Sciences
  • Journal: Journal of Engineering Computers & Applied Sciences (issn: 2319-5606, eissn: 2319-5606)
  • Subject: Engineering; Chemical Engineering | Hydrazine complexes, IR, 1-Naphthoxy acetic acid, Thermal analysis.

Complexes of 1-Naphthoxy acetic acid of divalent transition ions, with neutral hydrazine were prepared and characterized by the spectroscopic methods, IR & UV- visible, magnetic measurements and simultaneous TG DTA methods. They are sparingly soluble in water and ethanol, formulated as [M(N2H4)2{2-C10H7OCH2(COO)}2].4H2O where M = Co & Ni, [M(N2H4){2-C10H7OCH2 (COO)}2] . nH2O where M = Mn, Zn & Cd ; n = 0 or 1and [Cu(N2H4){2-C10H7OCH2 (COO)}2] at pH 6. IR spectra of the compounds show ?N-N in 954 -983 cm-1 region corresponding to coordinated, neutral bridging N2H4 ion and the symmetric ?CO and asymmetric ?CO in 1363-1400 cm-1 and 1598 - 1623 cm-1 evidence the complex formation respectively. Naphthoate complexes show weight loss due to dehydration and dehydrazination from 50C to 290 C and a strong exothermic decomposition between 290C and 750C leading to the formation of corresponding metal oxides as end products. The UV-Visible spectra and magnetic moment values of the compounds reveal their geometry, probably distorted octahedral with CN 6 for Ni (II), Co (II), Zn (II) & Mn (II) and tetrahedral for Cd and square planar for Cu complex with CN 4 .
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