Refinement of the crystal structure of (2.2.2-cryptand)potassium iodide

We again synthesized host-guest complex, (2.2.2-cryptand)potassium iodide [K(Crypt-222)+ · I− and restudied it by single-crystal X-ray diffraction. The trigonal rhombohedral crystal structure (space group R\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \bar 3 $$\end{document}c, a = 8.340 Å, c = 60.164 Å, Z = 6) is solved by a direct method and refined by full-matrix least squares in the anisotropic approximation to R = 0.049 by 1415 independent reflections (CAD-4 automated diffractometer, λMoKα). We found that Moras et al. [1] heavily lowered the real symmetry of the crystals and failed to notice their disorder.