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The structures of the four title compounds, C12H17BrO2, (I), C12H17BrO2, (II), C12H16Br2O2, (III), and C12H16Br2O2, (IV), which were obtained from the bromination of trans-4-methylbicyclo[6.3.0]undecane-2,6-dione, have been determined. The eight-membered rings in compounds (I)-(IV) take the boat-chair form.
Supporting information
| Crystallographic Information File (CIF) Contains datablocks br85, I, II, III, IV |
| Structure factor file (CIF format) Contains datablock I |
| Structure factor file (CIF format) Contains datablock II |
| Structure factor file (CIF format) Contains datablock III |
| Structure factor file (CIF format) Contains datablock IV |
CCDC references: 131306; 131307; 131308; 131309
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