view article
Figure 9
Rare carboxyl–carboxyl dimers involving the lone pair of the hydroxyl group (`hydroxyl dimers'). The C and O atoms not belonging to the interacting carboxyl groups are shown in light blue, N atoms are shown in magenta. The light blue spheres indicate that the molecule has been truncated for visualization purposes. (a) Antiplanar SS-A dimer (CACTUW; R = 0.04). Due to the size of the system, only the interacting fragments are shown. The unusually short carboxyl–Ow distance is given. The red asterisks mark the carboxyl groups involved in the ss-a dimer. (b) Antiplanar sa-s dimer (CAYJAO; R = 0.06). (c) Synplanar sa-s dimer involving two fumaric acid molecules (EMONAW; R = 0.11). The N-containing interacting molecule has been truncated due to its size.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 71| Part 2| March 2015| Pages 164-175
doi:10.1107/S205252061500270X
Follow Acta Cryst. B
Sign up for e-alerts
E-alerts
Follow Acta Cryst. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS