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Sketches of the main structural features of 1 CP. (a) A fragment of the CP, showing the local environment of the EuIII ions; (b,c) the brick-wall connectivity of a flat slab in 2, viewed down the axis normal to the CP extension, and from the side, respectively; (d) the overall crystal packing viewed down the a axis, showing that slabs, interacting only through weak van der Waals contacts mostly attributed to the DMSO ligands, stack along b with a ca. 9.7 Å periodicity.
