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Figure 1
Displacement ellipsoid representation (at 40% probability level) of the asymmetric unit in crystals of (1), (2), (3) and (4). Atoms are numbered in sequence around the rings; atom labels not shown can be determined from those given. H atoms have been omitted for clarity. Molecules of (1) occupy the twofold symmetry site and only one of two alternative positions of the atoms constituting the diol unit is displayed. Similarly, the disorder of the DMSO molecule in a crystal of (4) is not displayed.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 65| Part 1| January 2009| Pages 86-95
doi:10.1107/S0108768108041827
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