Dimethyl sulfoxide templates the assembly of 1,2-bis(chloromercurio)tetrafluorobenzene (1) into an internally Lewis acidic microporous solid of composition 1 small middle dot(DMSO)(3) (2). The channels of 2 contain both chelated and solvate DMSO molecules (omitted in the drawing for clarity), which can be partly exchanged with water molecules. The hydration-dehydration of the resulting compound is reversible.
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Tschinkl et al. (1999) studied this question.