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CONFORMATIONAL ANALYSIS – PRACTICE EXERCISES

21) E 22) anti < gauche < eclipsed < totally eclipsed 23) A – all alkyl groups are equatorial. CH3 H H H (e) (e) (e) The most stable conformation has to be a chair and the bulkiest group (isopropyl) has to be equatorial. The ethyl group has to be cis to isopropyl, and the methyl group has to be trans to ethyl.