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Unformatted text preview: (b) Indicate the types of strain energy present in each. If no strain is present, so indicate. Comment of the relative severity of each strain type. a. cyclobutane (most stable shape) b. cyclopentane (most stable shape) c. cyclohexane (chair form) d. cyclohexane (boat form) e. cycloheptane (puckered ring) 6. Draw the most stable chair conformation of each of the following molecules: (a) cis-1-ethyl-2-methylcyclohexane (b) cis-1-t-butyl-4-ethylcyclohexane 7. (a) Draw the two possible chair conformations for each of the following (i.e., the two chair conformations that arise when the molecule undergoes ring inversion). (b) Compute the total strain energy present in each chair conformation. Indicate which conformer is the more stable. (i) trans-1-chloro-3-methylcyclohexane (ii) cis-1-bromo-4-ethylcyclohexane...
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