Abstract
The title compound, [Zn{(CH3)(2)SO}(6)]I-4, is a one-dimensional supramolecular polymer along a threefold rotation axis of the space group. It is built up from discrete [Zn{(CH3)(2)SO}(6)](2+) units connected through non-classical hydrogen bonds to linear I-4(2-) polyiodide anions (C-H center dot center dot center dot I = 3.168 angstrom). The Zn II ion in the cation has an octahedral coordination geometry, with all six Zn-O bond lengths being equivalent, at 2.111 (4) angstrom. The linear polyiodide anion contains a neutral I-2 molecule weakly coordinated to two iodide ions.