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Synthesis and Spectroscopic Characterization of Oxalyl
Bis(Diacetylmonoxime Hydrazone) Metal Complexes
Nashwa M.
El-Metwally1, Ahmed A. El-Asmy1* and Azza A.
Abou-Hussen2
1Chemistry
Department, Faculty of Science, Mansoura University, Mansoura,
aelasmy@yahoo.com
Egypt.
2Chemistry
Department, Collage of Girls, Ain
Shams
University,Cairo,
Egypt.
Abstract:
Binuclear complexes of VO2+, Co2+, Ni2+,
Cu2+ and Zn2+ with oxalyl bis(diacetylmonoxime
hydrazone), H4ODMH, have been prepared. Elemental analysis,
spectral studies (IR, U.V-Vis., 1H NMR, ESR, MS) and
magnetic measurements were proved the structure of the formed
chelates. The data of elemental analysis suggest a 2:2 (M:L) molar
ratio. H4ODMH behaves as a dibasic tetradentate ligand in
all the studied complexes. The electronic spectra and magnetic moments
reveal an octahedral geometry for the VO2+ complex,
tetrahedral for the Zn(II) and square-planar for the rest. The
anomalous magnetic moment for the VO2+
complex is taken as strong evidence for the metal-metal bond. The ESR
spectra of the Cu(II) complex, in powder and DMF solution, reveal a
square-planar geometry. The in vitro antimicrobial activity of
the investigated compounds reveals a higher activity of H4ODMH
than its complexes.
Key words:
Metal Complexes, Oxalyl Bis(Diacetylmonoxime Hydrazone),
Spectroscopic Characterization, antimicrobial activity.
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