Synthesis, Structure and Characterization of a Helical Seven-Coordinated...

Authors

  • Mahboubeh A. Sharif Department of Chemistry, Qom Branch, Islamic Azad University, Qom, Iran
  • Gholam Reza Najafi Department of Chemistry, Qom Branch, Islamic Azad University, Qom, Iran

Keywords:

Chelating ligands, Cadmium(II) complex, Pyridine-2, 6-dicarboxylic acid, Helical chain.

Abstract

[Cd(C7H3NO4)(H2O)1.5]n or [Cd(2,6-pydc)(H2O)1.5]n, (1) (2,6-pydc = pyridine-2,6-dicarboxylate) was obtained from the reaction of pyridine-2,6-dicarboxylic acid and 4-hydroxypyridine-2,6-dicarboxylic acid with cadmium(II) nitrate tetrahydrate in the presence of piperazine and characterized by elemental analysis, IR spectra and X-ray single crystal diffraction. Complex (1) is a novel carboxylate-bridged one-dimensional pincer-shaped helical chain of cadmium(II) polymer. Each Cd atom is seven-coordinate and exhibits an approximately pentagonal-bipyramidal CdNO6 coordination geometry. The metal fragments are linked via the central four-membered Cd2O2 ring and the structural analysis showed that 4-hydroxypyridine-2,6-dicarboxylic acid and piperazine do not appear in the structure.

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Published

22.10.2013

Issue

Vol. 60 No. 1 (2013)

Section

Inorganic chemistry

License

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