A Hexameric Hexagonal Organotin Macrocycle. Supramolecular
Entrapment of an Iodide–Iodide Short Contact
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Abstract
A hexanuclear
hexagonal organotin macrocycle [(<i>n</i>-Bu<sub>3</sub>Sn)<sub>6</sub>(μ-L)<sub>6</sub>(I<sup>–</sup>)<sub>2</sub>(MeOH)<sub>6</sub>] (<b>1</b>) was synthesized
in a 1:1 reaction of (<i>n</i>-Bu<sub>3</sub>Sn)<sub>2</sub>O and 4,5-dicarboxy-1,3-dimethyl-1<i>H</i>-imidazol-3-ium
iodide (LH<sub>2</sub>I). The molecular structure
of <b>1</b> reveals that it is a 42-membered hexatin macrocycle
possessing a <i>C</i><sub>3</sub> (pseudo-<i>S</i><sub>6</sub>) symmetry. The alternate up–down arrangement
of imidazolium units allows the molecule to assume a <i>chair</i> topology. The hexagonal packing of these macrocycles, in the solid-state,
results in nanoscale one-dimensional channels which entrap two I<sup>–</sup> ions in close proximity (∼3.7 Å) as a
result of various supramolecular interactions
