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Chapter 4: Q.15. (page 128)

Question: Which of the following is (are) possible Newman projections for 2-methylpentane?

Short Answer

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Answer

The possible Newman projections for 2-methylpentane are A and B.

Step by step solution

01

Newman projection

A Newman projection involves the representation of alkane with the help of dots and circles. Two carbon atoms are required in this projection.

02

Explanation for possible Newman projections

The given compound is 2-methylpentane. The possible Newman projections for 2-methylpentane are mentioned below:

Staggered conformation

03

Explanation for wrong projection

Compound C is the conformation of 3-methylpentane, as shown below:

Compound C

Thus, the possible Newman projections for 2-methylpentane are A and B.

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Most popular questions from this chapter

Question: Convert each structure to a Newman projection around the bond highlighted in pink.

a.

b.

c.

Question: Draw the three constitutional isomers having molecular formula C7H14that contain a five-membered ring and two methyl groups as substituents. For each constitutional isomer that can have cis and trans isomers, draw the two stereoisomers.

Question: Rank the following alkanes in order of increasing boiling point.

Question: Arrange the following compounds in order of increasing boiling point.

Question: Cyclopropane and cyclobutane have similar strain energy despite the fact that the C-C-C bond angles of cyclopropane are much smaller than those of cyclobutane. Suggest an explanation for this observation, considering all sources of strain discussed in Chapter 4.
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