Die Chelate von Co(II), Ni(II), Cu(II), Zn(II) und Cd(II) mit Malonsäurehydrazid und dessen Arylidenderivaten |
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| Authors: | Prof Dr R M Issa Y M Temerk M R Mahmoud M A Khattab |
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| Institution: | (1) Chemistry Department, Faculty of Science, Assiut University, A. R. Egypt;(2) Present address: Faculty of Science, Tanta University, Tanta, A. R. Egypt |
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| Abstract: | The metal chelates formed by the reaction of Co2+, Cu2+, Ni2+, Zn2+, and Cd2+ with malonic hydrazide and its arylidene derivatives are investigated. The i.r.-absorption spectra of the solid compounds supported the tetradentate character of these compounds; they also show that the ligand still attained the keto form. The shift of the C=O, C=N bands is utilized in determining the coordination bond length. The stoichiometry of the metal complexes, as studied by spectrophotometric and conductometric methods, is found to be metal ion: ligand =1 1. The apparent formation constants of the malonic hydrazide complexes are also determined.
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