Abstract
The podand, bis(2-methoxyphenoxy)m-xylene (1), was designed and synthesized as a potential host for the cesium ion. Its structure was determined by single crystal X-ray diffraction. It crystallizes in P21/c with cell dimensions: a = 8.5723(7) Å, b = 8.3931(14) Å, c = 25.2879(26) Å, β = 96.224(9)○, and V = 1808.7(4) Å3. A crown derivative, tribenzo-21-crown-6 (2), was also prepared and structurally characterized. It also crystallizes in P21/c with cell dimensions: a = 15.5825(13) Å, b = 15.8648(16) Å, c = 8.8266(7) Å, β = 95.247(6)○, and V = 2172.9(3) Å3. The structures exhibit hydrogen bonding, and are evaluated in terms of complementarity and preorganization for cesium binding.
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Bryan, J.C., Hay, B.P., Sachleben, R.A. et al. Design, synthesis, and structure of novel cesium receptors. Journal of Chemical Crystallography 33, 349–355 (2003). https://doi.org/10.1023/A:1024269812003
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DOI: https://doi.org/10.1023/A:1024269812003