Acta Cryst. (2008). C64, o657-o660 [ doi:10.1107/S0108270108038286 ]
Abstract: 2,6-Bis(tert-butyldimethylsilyloxy)-9-oxabicyclo[3.3.1]nonane-3,7-diol, C20H42O5Si2, (I), and 4,8-bis(tert-butyldimethylsilyloxy)-2,6-dioxatricyclo[3.3.13,7]decane-1,3-diol, C20H40O6Si2, (II), form layered structures that differ in the way the molecules are connected within each layer. The endocyclic O atom common to both structures plays an active role in the hydrogen-bonding network, whereas the second oxygen bridge in (II) does not participate in any interaction. This work reports the first structural analysis of two bis(tert-butyldimethylsilyloxy)-substituted cyclic diol derivatives and provides insight into the influence of small changes in the molecular structure on the supramolecular aggregation. The unbalanced hydrogen-bond acceptor/donor ratio, greater in (II) than in (I), does not result in the inclusion of water molecules in the structure.
Formula: C20H42O5Si2 and C20H40O6Si2
 |   Structure factor file (CIF format) (520.3 kbytes) |
| Structure factor file (CIF format) (495.7 kbytes) |
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