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Hydrogen-bonding motifs in (a) (enro+)2(adi2–)·adi·CH3CN, (b) (nor+)2(az2–)·az·4H2O: red, nor+ A; blue, nor+ B; green, az2–; and purple, az; and (c) (nor+)(seb–)·nor·H2O: red, nor+; blue, nor. Solvent molecules of crystallization are not shown in panel (a).
