Abstract
It was shown for the first time that the crystal packing mode of the ammonium salt of thiophene-2,5-diylbis(phenylphosphinic acid) substantially differs from that of the dimethyl-ammonium salt of 1,4-phenylenebis(phenylphosphinic acid). The former crystal packing is a three-layer supramolecular sandwich structure consisting of two anionic layers separated by a layer of ammonium cations, whereas the supramolecular organization of the latter salt is based on alternating layers of anions and cations linked by hydrogen bonds.
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