| Abstract: | Molecular and Crystal Structure of Rubidium(dibenzo‐18‐crown‐6)pentaiodide Rb(C20H24O6)]I5 Rb(Dibenzo‐18‐crown‐6)]2(I5)2 is obtained as dark brown columns by reacting dibenzo‐18‐crown‐6, rubidium iodide, and iodine in a molar ratio of 1 : 1 : 6 in ethanole / dichlormethane (1:1). Rb(C20H24O6)]2(I5)2 crystallizes with four formula units per unit cell in the orthorhombic space group Pnma with a = 1725.15(2) pm, b = 1863.76(3) pm and c = 1885.19(3) pm. The crystal structure consists of pentaiodide units I5—, which are linked to one another by head‐to‐tail‐contacts. The I2 units, which stick out of the chain, are twisted against each other, in a way that neither a cis or a trans configuration is formed. By secondary bonding, the iodine atoms form nets of 18‐member planar rings with an almost rectangular form. This net‐like structural element has not been described up to now. |
