August 2006 issue
Cover illustration: Two closely related substituted amides have quite different hydrogen bonding. The triphenylmethyl derivative illustrated here forms discrete dimers, while its analogue with a less sterically demanding benzyl group assembles into polymeric chains. See Whiteaker, Pal Chaudhuri, Powell & Houser [Acta Cryst. (2006), E62, o2707-o2709].