Packing and polytypism in 1,10-phenanthrolin-1-ium (2-carboxyethyl)(2- carboxylatoethyl)dichloro-stannate(IV)

Weenawan Somphon, Kenneth J. Haller*, A. David Rae, Seik Weng Ng

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The 1:1 adduct of [SnCl2(C2H4COOCH 3] and 1,10-phenanthroline, (C12H8N 2), which was set aside for 25 years, when recrystallized from ethanol was found to be the salt [C12H9N2] +·[SnCl2(C2H4COO)(C 2H4COOH)]-. The SnIV atom in the anion has pseudo-octahedral coordination with two cis Cl atoms, two C atoms and two O atoms trans to the Cl atoms. The possibility of alternative stacking of layers perpendicular to c* offers an explanation for observed twinning and polytypism. An ordered, untwinned, Z = 2 crystal structure was determined. Pairs of adjacent anions are linked together by strong intermolecular O-H⋯O- hydrogen bonds, and the cation contains a strong intramolecular N-H⋯N hydrogen bond between its two N atoms. The protonated ring of the cation exhibits increased Lewis acidity and is linked into a network with the anions using a strong N-H⋯O and weak C-H⋯O and C-H⋯Cl interactions. The remaining rings of the cation form weaker C-H⋯O and C-H⋯Cl interactions. The cations stack in columns along a with an interplanar spacing of 3.24 Å for separations between cations inversion-related about (1, 1/2, 1/2) and 3.34 Å for separations between cations inversion-related about (1/2, 1/2, 1/2).

    Original languageEnglish
    Pages (from-to)255-261
    Number of pages7
    JournalElectrochemical and Solid-State Letters
    Volume9
    Issue number5
    DOIs
    Publication statusPublished - 2006

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