Over the past 10 years our group has been studying complexes of 2,6-pyridinedicarboxylate (pdc) of the type [M’(H2O)5][M(pdc)2] where M and M’ are different divalent first row transition metals. The complexes were prepared by first making the dianionic [M(pdc)]2- brick and subsequently adding the second transition metal ion. The original goal was to study the magnetic interactions between the two metal centers mediated by the pdc ligand. However, we have found that unless M = Cu2+ the product formed may deviate from the expected complex. Since then we have discovered that Cu2+ will replace other metals in the brick. Over the past year, we have worked with Ni2+ and Cu2+ in order to study the replacement of nickel ions in the brick by copper ions. We have characterized the products by IR, X-ray crystallography, and UV-Vis. We have also carried out binding constant analysis for pdc and the two metal ions. The results of these analyses will be presented.

Complexes of 2,6-pyridinedicarboxylate: Understanding the complex chemistry of a simple ligand

255th National Meeting (2018)

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