Conclusions
On the basis of the dipole moments, Meldrum acid, its monomethyl derivatives, and 2-phenyl-1,3-dioxa-4,6-cyclohexadione in benzene solution have the bathtub conformation, while 2,2,5,5-tetramethyl-1,3-dioxa-4,6-cyclohexadione has the armchair conformation.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1577–1579, July, 1973.
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Klimovitskii, E.N., Yuldasheva, L.K. & Arbuzov, B.A. Spatial structure of meldrum acid and some of its derivatives. Russ Chem Bull 22, 1527–1529 (1973). https://doi.org/10.1007/BF00930054
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DOI: https://doi.org/10.1007/BF00930054