(2R,3R)-1,4-Dioxa­spiro­[4.4]nonane-2,3-di­carb­oxy­lic and (2R,3R)-1,4-dioxa­spiro­[4.5]decane-2,3-di­carb­oxy­lic acids

Minyaev, M.E.; Roitershtein, D.M.; Vinogradov, A.A.; Ananyev, I.V.; Nifant'ev, I.E.

doi:10.1107/S2056989018009593

Acta Crystallographica Section E
Acta Crystallographica
Section E CRYSTALLOGRAPHIC COMMUNICATIONS

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Figure 5
(a) The packing of (I)

parallel to (001). Two interacting molecular layers are shown. Only the H atoms involved in hydrogen bonding (blue dashed lines) have been included. Displacement ellipsoids are drawn at the 50% probability level. (b) The simplified structure of the two-dimensional double-layered framework. Molecules (circles) and hydrogen bonds (solid lines) within the same layers are shown in the same colour (blue or red). Hydrogen bonds between two layers are shown as solid black lines.

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 74| Part 8| August 2018| Pages 1058-1062

https://doi.org/10.1107/S2056989018009593

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