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Chapter 3: Q.3-3-17P (page 60)

Question: Sight along the C2-C3 bond of 2,3-dimethylbutane, and draw a Newman projection of the most stable conformation.

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01

Newman Projection

The conformation of a particular molecule can be visualized using structures termed Newman projection. The carbon is rotated around a specific bond to produce several conformers in Newman projection.

02

Newman projection of the most stable conformer

The most stable conformer of 2,3-dimethylbutane can be given as shown below.

Stable conformer of 2,3-dimethylbutane

This conformer is the most stable of all the conformers as the two methyl groups in this conformer are situated opposite to each other. So there is no repulsion among the bulky, methyl groups. The above conformation is the staggered conformation of 2,3-dimethylbutane.

This stable conformer is generated due to the rotation of C2 and C3.

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Most popular questions from this chapter

In each of the following sets, which structures represent the same compoundand which represent different compounds?

(a)

For each of the following compounds, draw an isomer that has the same functional group.

a.

b.

c.

d.

e.

f.

We鈥檒l see in the next chapter that there are two isomeric substances, both named 1,2-dimethylcyclohexane. Explain.

Give IUPAC names for the following alkanes, and convert each drawing

into a skeletal structure.

Sight along the C2-C1 bond of 2-methylpropane (isobutane).

(c) Make a graph of energy versus angle of rotation around the C2-C1 bond.
See all solutions

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