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Linkers and sections of the packing diagrams of (a) Cu-BPY-HFS, [Cu(µ-SiF6)(µ-4,4'-bipy)2] (BPY = 4,4'-bipyridine, HFS = hexafluorosilicate), (b) Cu-BTC, [Cu3(BTC)2(H2O)3] (BTC = benzene-1,3,5-tricarboxylate) and (c) MOF-5 (IRMOF-1), [Zn4O(BDC)3] (BDC = benzene-1,4-dicarboxylate, terephthalate).
