Transcription of 7.4 DISUBSTITUTED CYCLOHEXANES - Sapling Learning
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7.4 DISUBSTITUTED CYCLOHEXANES - Sapling Learning
DISUBSTITUTED CYCLOHEXANES281(b) Estimate the energy difference between the gauche and anti conformations of a reason why the energy difference between conformations of ethylcyclohexane isabout the same as that for methylcyclohexane, even though the ethyl group is larger than amethyl CYCLOHEXANESA. Cis Trans Isomerism in DISUBSTITUTED CyclohexanesConsider a typical DISUBSTITUTED cyclohexane, one stereoisomer of this compound, both the chloro and methyl groups are in equatorial po-sitions.
286 CHAPTER 7 • CYCLIC COMPOUNDS. STEREOCHEMISTRY OF REACTIONS However, the chair interconversion converts one enantiomer into the other: From the way they are drawn, structures A and B may not look like enantiomers, but they are! You can see this by turning structure B 120° about a vertical axis: In other words, cis-1,2-dimethylcyclohexane is a mixture of conformational enantiomers
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