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Figure 7
Carboxyl–carboxyl dimers involving a syn conformer and the lone pair of a carbonyl group (`carbonyl dimer') along with their rotamer distribution around the interlinking hydrogen bond for structures with R ≤ 0.05. The C and O atoms not belonging to the interacting carboxyl groups are shown in light blue, F and Cl atoms are shown in yellow and green, respectively. (a) Antiplanar SS-S dimer (NAGVUM) and O1—O2—O3—O4 dihedral angle rotamer histogram. (b) Antiplanar SS-A dimer (CBUCDX01) and O1—O2—O3—O4 dihedral angle rotamer histogram. (c) Antiplanar and synplanar SA-S dimers (CLACET01 and ACETAC09) and O1—O2—C3—C4 dihedral angle rotamer histogram. (d) Antiplanar SA-A dimer (MALIAC12) and O1—O2—C3—C4 dihedral angle rotamer histogram.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 71| Part 2| March 2015| Pages 164-175
doi:10.1107/S205252061500270X
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