Using Newman projections draw all the conformations (starting from fully/totally eclipsed (0°), gauche(60°), eclipsed (120°), anti (180°), eclipsed (240°), gauche (300°), fully/totally eclipsed (360°) for n-Butane (one full rotation). Also, draw corresponding energy profile diagram for all the conformations (one full rotation)

Using Newman projections draw all the conformations (starting from fully/totally eclipsed (0°), gauche(60°), eclipsed (120°), anti (180°), eclipsed (240°), gauche (300°), fully/totally eclipsed (360°) for n-Butane (one full rotation). Also, draw corresponding energy profile diagram for all the conformations (one full rotation)

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter7: Cycloalkanes

Section: Chapter Questions

Problem 17E: Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of...

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For pentane draw Newman projections for the Syn-periplanar, conformation. the Anti- periplanar conformation and a Gauche conformation. Use C2 as the front carbon and C3 as the back carbon. Label each conformation, circle the highest energy conformation andunderline the lowest energy conformation.
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Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of methylcyclohexane in the chair conformation: a. When the methyl group is in an axial or equatorial (circle one) position, the molecule is inits lowest potential energy conformation. b. Label one Newman projection above anti and the other gauche to describe the relationshipbetween the methyl group and C3 of the ring. c. In general, which is a lower PE conformation, anti or gauche? d. Explain how your answer to b and c provide an explanation for why it is more favorable fora large group to be in an equatorial than an axial position.
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Draw Newman projections for all the additional eclipsed and staggered conformations B, C, D, E and F, arising from rotation about the C1-C2 bond of 1,1-dichloropropane. Start with Newman projection A and rotate the front carbon clockwise in 60o steps in order to generate the other Newman projections. Sketch the energy profile diagram starting with Newman projection A, showing the relative energy levels of projections B through F. Write the letter designation of the conformation under each appropriate section of the energy profile diagram.
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Draw tert-butylcyclohexane in the chair conformation, then perform a ring flip on your 1st drawing to give your second chair conformation. Label the tert-butyl group as axial or equatorial. Label the conformation that is more stable.