Journal Title
Title of Journal: JICS
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Abbravation: Journal of the Iranian Chemical Society
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Publisher
Springer-Verlag
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Authors: M Ghadermazi F Manteghi S Mehdizadeh N Kakaei A Shokrollahi Z Malekhosseini M Shamsipur
Publish Date: 2012/08/04
Volume: 8, Issue: 4, Pages: 919-930
Abstract
The new compounds phhyH2pydc 1 and phhyHNipydcpydcH3H2O 2 phhy phenylhydrazine pydcH2 pyridine26dicarboxylic acid were synthesized and characterized by IR 1H NMR 13C NMR and UV spectroscopy The structure of 2 was determined by Xray crystallography In the crystal structure the metal ion was six coordinated by two tridentate pydc2− and pydcH− groups and each anionic complex unit NipydcpydcH− was accompanied by one phhyH+ as counter ion and two water molecules In compound 2 a large number of OH⃛OO NH⃛O and CH⃛O hydrogen bonds were observed These interactions as well as other noncovalent interactions such as ion pairing CO⃛π and ππ stacking play an important role in the formation and stabilization of the crystal lattice In the solution study the equilibrium constants for the binary pydcphhy proton transfer system the stoichiometry and stability of complexation of this system with Ni2+ ion in aqueous solution were investigated using potentiometric pH titration method The stoichiometry of the most abundant species in the solution was compared to the crystalline cited metal ion complexes
Keywords:
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