Hydrogen bonding has emerged to be the most powerful tool among the directional intermolecular interactions in supramolecular synthesis. Evolution of an assembly depends on the nature of the functional group under consideration. To this end, assemblies involving the carboxylic group (- COOH) are very widely applied because of its ability to form robust hydrogen bonds on its own and also with the different compound and also mimics biological events. In this work, reaction of pyridine-2,6-dicarboxylic acid (pydcH2) and 2-amino pyridine (apy) with chloride ferric and chromice resulted in the formation two new supramolecularly coordination compounds, (apy) [M(pydc)2] .pydcH2.5H2O; M = Cr and Fe. The title compounds were characterized with elemental analyses, IR spectroscopy, TGA, potentiometric studies, and single crystal X-ray diffraction.

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