Draw the most stable conformation for each of the following substituted cyclohexanes; then, in each case, flip the ring and redraw the molecular in the higher energy chair conformation. Shown all conformation in Newman projections. Fill in hydrogens to indicate unsubstituted carbons. b) ŏ most stable conformation: higher energy conformation: most stable conformation: higher energy conformation:

Draw the most stable conformation for each of the following substituted cyclohexanes; then, in each case, flip the ring and redraw the molecular in the higher energy chair conformation. Shown all conformation in Newman projections. Fill in hydrogens to indicate unsubstituted carbons. b) ŏ most stable conformation: higher energy conformation: most stable conformation: higher energy conformation:

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter6: Alkanes & Alkenes

Section: Chapter Questions

Problem 2CTQ

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Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.
Consider the Newman projection below. a. Draw a full Lewis structure of this molecule with R1=Me,R2=Et , and R3=iPr . b. Given the sizes of these R groups (R3R2R1) , does the Newman projection above show thelowest potential energy conformation of this bond? If not, draw a Newman projectionshowing the lowest P.E. conformation (sighting down this same bond). c. To draw a Newman projection in the lowest P.E. conformation, the following rule of thumbusually applies: Place the largest group on the front carbon anti to the largest group on theback carbon. Is your answer to the previous question consistent with this rule of thumb?
a model of cyclohexane in a chair conformation, and explain why the names “axial” and“equatorial’ are appropriate.
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