October 2013 issue
Cover illustration: The compound C11H8O5 features a `skipped' diene, an anti-bis(epoxide) and a cyclic carbonate, all embedded in a densely functionalized [4.4.3]propellane scaffold. The crystal packing of this diepoxide is effected primarily by C-HO hydrogen bonds, which link the molecules into tapes along the b-axis direction. Inter-tape connectivity is brought about by centrosymmetrically disposed pairs of CO contacts [3.183 (4) Å] between the C+=O- dipoles of neighbouring carbonate moieties. See: Mehta, Sen & Kumar [Acta Cryst. (2013). E69, o1504-o1505].