A Heterobimetallic Anionic 3,6-Connected 2D Coordination Polymer Based on Nitranilate as Ligand

In order to synthesize new coordination polymers with original architectures and interesting magnetic properties, we used the nitranilate ligand (C6O4(NO2)(2)(2-) = C6N2O82-), derived from the dianionic ligand dhbq(2-) (2,5-dihydroxy-1,4-benzoquinone = H2C6O42-). The use of this bis-bidentate bridging ligand led to [(DAMS)(2){FeNa(C6N2O8)(3)}center dot CH3CN](n) (1) (DAMS(+) = C16H17N2+ = 4-[4-(dimethylamino)-alpha-styryl]-1-methylpyridinium), a 2D heterometallic coordination polymer presenting an unprecedented structure for any anilato-based compound. This structural type is a 3,6-connected 2D coordination polymer derived from the well-known honeycomb hexagonal structure, where Fe(III) ions alternate with Na+ dimers (as Na2O12 units) in the vertices of the hexagons and with an additional [Fe(C6N2O8)(3)](3-) anion located in the center of the hexagons connecting the three Na+ dimers. The magnetic properties of compound 1 show the presence of paramagnetic isolated high spin Fe(III) complexes with a zero field splitting, |D| = 8.5 cm(-1).