October 2009 issue
Cover illustration: 3-(1H-Imidazol-1-yl)propanenitrile, C6H7N3, is a precursor of nitrile-based ionic liquids. Such materials are finding increasing use in both organic and inorganic synthesis as replacements for more volatile organic solvents. Originally this compound was reported to be a liquid at room temperature. However a freshly distilled sample crystallized spontaneously, forming colourless crystals melting at 310 K. Weak C-HN contacts stabilize the crystal packing. See Peppel & Köckerling [Acta Cryst. (2009). E65, o2480].