Abstract
Hydrothermal reaction of cobalt nitrate, phenylmalonic acid, and 4,4′-dipyridylamine (dpa) resulted in formation of the coordination polymer [Co 2(phac) 4(dpa) 2(H 2O)] ( 1, phac = phenylacetate), where the phac ligand is formed in situ by the decarboxylation of phenylmalonic acid. Binuclear [Co 2(phac) 4(H 2O)] units with both bridging and monodentate benzenecarboxylate ligands are linked into a two-dimensional (4, 4) rhomboid grid network via dpa tethers within the structure of 1. Use of benzoate as the anionic component allowed the formation of [Co(benzoate) 2(dpa) 2] ( 2), which manifested a dpa-linked one-dimensional chain coordination polymer motif with pendant monodentate and chelating carboxylates. Modest antiferromagnetic coupling was observed within the binuclear units in 1.
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