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Chapter 3: Q14P (page 165)

Draw a perspective representation of the most stable conformation of 3-methylhexane.

Short Answer

Expert verified

The most stable conformation of 3-methylhexane is;

Step by step solution

01

The Conformation.

The conformation is a process of rotating the compound about the sigma bonds to get a different conformational isomer.

02

The skeletal conformer of 3-methylhexane converted to Newman projection.

The given compound consists of 7 carbon atoms, out of which; one carbon atom (methyl group) is attached to the 3rd carbon of the hexane chain.

In the flying wedge projectionof the given compound; the 3rd and 4th carbon are brought in front of each other.

There is one H-atom in 3rd carbon and two H-atoms on 4th carbon.

03

The most stable conformation of 3-methylhexane.

This is the anti-conformation of 3-methylhexane in Newman Projection;

Here, the two bulky ethyl groups are at anti-position and one methyl is in gauche interaction with one of the ethyl groups; making it the most stable conformer.

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Most popular questions from this chapter

Question: Which of the following cycloalkanes are capable of geometric (cis-trans) isomerism? Draw the cis and trans isomers

(a)3 - ethyl - 1,1 - dimethylcyclohexane

(b)1 - ethyl - 3 - methylcycloheptane

(c)1 - ethyl - 3 - methylcyclopentane

(d)1 - cyclopropyl - 2 - methylcyclohexane

Using what you know about the conformational energetics of substituted cyclohexanes, predict which of the two 9-methyldecalinisomers is more stable. Explain your reasoning.

Draw the most stable conformation of

(a) cis - 1 - tert - butyl - 3 - ethylcyclohexane

(b) trans - 1 -tert- butyl - 2 - methylcyclohexane

(c) trans - 1 -tert - butyl - 3 - (1,1 - dimethylpropyl)cyclohexane

Question: All of the following names are incorrect or incomplete. In each case, draw the structure ( or a possible structure) and name it correctly

Give the IUPAC name of the following alkanes.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)
See all solutions

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