Abstract
1. Absorption bands have been found in the infrared spectra of lactones of cis- and trans-2-oxycyclohexylacetic acid and their functional derivatives, the location of which depends on the configuration at the place where the lactone and cyclohexane rings are joined together. This has made it possible to determine from the spectra what this configuration is for several lactones of this class where the joining configuration was unknown. 2. Introducing substituents into the Cα and C3 position lowers the carbonyl absorption frequency when the samples are in the crystalline state. For substituents in the C3 position, the shift to the low frequency region increases in the order OH > I > Br. 3. If I is substituted for Br at the C3 position in the lactones, all the absorption bands in the 400–700 cm”§-1 region are shifted to lower frequencies.
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Schedule a callMore From: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science
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