Citation: Volkmar Stenzel; J\"org Jeske; Wolf-Walther du Mont; Peter G. Jones (1997). Supramolecular Soft-Soft Interactions of Diiodo(tert-butyl)(isopropyl)phosphonium Cations with \m~2~- to \m~5~-Bridging Iodide Anions. Formation of Chains, Helices, and Columnar Structures. Inorganic Chemistry, 36, pp. 443-448.