Darstellung und Kristallstrukturen von [K(crypt-2.2.2)]2 S7 · (H2N-(CH2)2-NH2) und [K(crypt-2.2.2)]2S6 / Synthesis and Crystal Structures of [K(crypt-2.2.2)]2S7 · (H2N-(CH2)2-NH2) and [K(crypt-2.2.2)]2S6

Abstract

Preparation and crystal structures of the two title compounds are reported. Both of them can be obtained by reaction of K2S5 , sulfur and (crypt-2.2.2) in ethylenediamine (en). [K(crypt-2.2.2)]2S7 · en is monoclinic, S. G. P21/c, with a = 14.347(5) Å, b = 13.148(5) Å, c = 29.42(2) Å, β = 92.84(3)°. [K(crypt-2.2.2)]2S6 is monoclinic, S. G. P21/c, with a = 30.23(2) Å, b = 8.513(5) Å, c = 22.37(2) Å, β = 116.16(2)°. The anionic parts of the lattices consist of unbranched chains S7 2- and S 6 2- , respectively. The characteristic features of the cations [K(crypt-2.2.2)]+ in some polysulfides are briefly discussed