Acta Cryst. (2008). E64, m126-m127  [ doi:10.1107/S1600536807064215 ]

Bis[(E)-2-(3-hydroxy-4-methoxyphenyl)ethenyl]-1-methylquinolinium tetraiodidozincate(II) methanol solvate

S. Chantrapromma, H.-K. Fun, K. Chanawanno and P. Ruanwas

Abstract: In the title compound, (C₁₉H₁₈NO₂)₂[ZnI₄]·CH₃OH, each cation is nearly planar and exists in an E configuration, the dihedral angles between the quinolinium systems and the benzene rings being 1.78 (10) and 5.44 (10)° for the two cations. The [ZnI₄]^2- anion displays a very slightly distorted tetrahedral geometry. There are intramolecular O-HO hydrogen bonds between the hydroxy and methoxy groups in each cation which generate S(5) ring motifs. In the crystal structure, cations are linked together by O-HO hydrogen bonds and weak C-HO interactions, whereas the anions are linked to the cations through weak C-HI interactions. The asymmetric unit also contains a methanol solvent molecule which is linked to one of the cations by an O-HO hydrogen bond and the anion through an O-HI hydrogen bond. The crystal is further stabilized by C-H and - interactions [centroid-centroid distances 3.6054 (15) and 3.6057 (15) Å].

Online 6 December 2007

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