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. This compound is in rapid equilibrium with a conformational diastereomer in whichboth the chloro and methyl groups assume axial conformation (or the mixture of them) is called designation trans is used with cyclic compounds when two substituents have anup down that the up down relationship is unaffected by the chair interconversion.
282 CHAPTER 7 • CYCLIC COMPOUNDS. STEREOCHEMISTRY OF REACTIONS In a different stereoisomer of 1-chloro-2-methylcyclohexane, the chloro and methyl groups occupy adjacent equatorial and axial positions.
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