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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

Expert verified

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: Draw the five constitutional isomers having molecular formula C6H14.

Question: Calculate the destabilization present in each eclipsed conformation.

a.

b.

Question: Classify the ring carbons as up C鈥檚 or down C鈥檚. Identify the bonds highlighted in bold as axial or equatorial.

Question: Consider 1,2-dimethylcyclohexane.

  1. Draw structures for the cis and trans isomers using a hexagon for the six-membered ring.
  2. Draw the two possible chair conformations for the cis isomer. Which conformation, if either, is more stable?
  3. Draw the two possible chair conformations for the trans isomer. Which conformation, if either, is more stable?
  4. Which isomer, cis or trans, is more stable and why?

Give the structure corresponding to each IUPAC name.

a. 1,2-dimethylcyclobutane

b. 1,1,2-trimethylcyclopropane

c. 4-ethyl-1,2-dimethylcyclohexane

d. 1-sec-butyl-3-isopropylcyclopentane

e. 1,1,2,3,4-pentamethylcycloheptane
See all solutions

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