Ab. Zolotoi et al., AUTOASSEMBLY OF CAGE STRUCTURES .6. X-RAY-DIFFRACTION STUDY OF THE CONFORMATION OF 4-DIMETHYL-2,5-DIOXABICYCLO[2.2.2]OCTANE-3,6-DIONE, Russian chemical bulletin, 43(11), 1994, pp. 1854-1856
The molecular structure of 1,4-dimethyl-2,5-dioxabicyclo [2.2.2]octane
-3,6-dione (1) has been determined by X-ray diffraction analysis. The
skeleton of dilactone 1 has a synchro(+,+,+)-twist conformation with d
ihedral angles phi = 4.0 degrees for the hydrocarbon bridge bonds and
phi = 4.4, 4.6 degrees for the lactone bridge bonds.