Abstract
Two novel hydrogen-bonded isomeric water-imdn aggregations were observed in two Co(II) coordination compounds, formulated as {[Co(2,2′-bpy)3][(imdn)2(H2O)4]}(1) and {[Co(4,4′-bpy)2][(imdn)2(H2O)4]}n(2) (bpy = bipyridine, Himdn = 2H-imidazole-4,5-dicarbonitrile). The water-imdn aggregation in 1 is a 1D hydrogen-bonded tape based on an octamer water cluster. For 2, two imdn and four water molecules are hydrogen bonded to an unprecedented bag-like binary supramolecular cluster which acts as a tetrahedral node to be hydrogen-bonded to its four neighbors, giving a 3D network with a diamond topology. Two translationally equivalent diamond networks mutually interpenetrate each other to form the resulting 2-fold diamond network. The different host structural motifs are responsible to the dissimilarity of two isomeric water-imdn aggregations.
Published Version
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