title: Isolated pentaiodide anions in [K(18-crown-6)]I(5).
abstract: (1,4,7,10,13,16-Hexaoxacyclooctadecane-kappa(6)O)potassium pentaiodide, [K(C(12)H(24)O(6))]I(5), obtained by slow evaporation of an ethanol solution of KI, 18-crown-6 and I(2), contains [K(18-crown-6)](+) cations (C(i) symmetry) and I(5)(-) anions (C(2) symmetry), which are arranged in alternating layers parallel to (001). In contrast to the well known tendency of I(5)(-) ions to form chains and nets, the I(5)(-) units in the title compound are isolated.
authors.affiliation: Institut für Anorganische Chemie, Universität zu Köln, Greinstrasse 6, D-50939 Köln, Germany. ac118@uni-koeln.de
authors.forename: Ingo
authors.initials: I
authors.lastname: Pantenburg
authors.forename: Ingrid
authors.initials: I
authors.lastname: Müller