Studies of Mn(II), Co(II), Ni(II) and Cu(II) Chelates with 3-phenyl-4-(p-methoxy- phenylazo)-5-pyrazolone |
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Authors: | S A Abdel-Latif H B Hassib |
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Institution: | (1) Chemistry Department, Faculty of Science, Helwan University, Cairo, Egypt;(2) Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt |
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Abstract: | Mn(II), Co(II), Ni(II) and Cu(II) chelates with3-phenyl-4-(p-methoxyphenylazo)-5-pyrazolone have been synthesized and were characterized by elemental and thermal analyses as well as
by IR, UV-VIS, 1HNMR, conductometric and magnetic measurements. The first stage in the thermal decomposition process of these complexes shows
the presence of water of hydration, the second denotes the removal of the coordinated water molecules. The final decomposition
products were found to be the respective metal oxides. The data of the investigated complexes suggest octahedral geometry
with respect to Co(II) 1:1, tetrahedral for Ni(II) 1:1and 2:3; square planar for Cu(II) 1:1 and 2:3; the complexes with no
coordinated water molecules (2:3) Co(II) and Mn(II) complexes are tetrahedral.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | azodyes chelates cobalt copper manganese nickel pyrazolone |
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