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Chapter 4: Q15. (page 146)

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

Short Answer

Expert verified

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

Step by step solution

01

Step 1. Newman projection

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

02

Step 2. Explanation for possible Newman projections

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

Staggered conformation

03

Step 3. Explanation for wrong projection

The 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: Name each alkane using the ball-and-stick model, and classify each carbon as 10,20,30, or 40.

a.

b.

Question: Rank the following conformations in order of increasing energy.

Question: The melting points and boiling points of two isomeric alkanes are as follows: CH3(CH2)6CH3, mp=-570C and bp=1260C;(CH3)3CC(CH3)3 , mp=1020C and bp=1060C.

a. Explain why one isomer has a lower melting point but higher boiling point.

b. Explain why there is a small difference in the boiling points of the two compounds but a huge difference in their melting points.

Question: Consider the tricyclic structure A.

(a) Label each substituent on the rings as axial or equatorial.

(b) Draw a skeletal structure for A, using wedges and dashed wedges to show whether the substituents are located above or below the rings.

A

Question: Consider the tricyclic structure B.

(a) Label each substituent on the rings as axial or equatorial.

(b) Draw B using chair conformations for each six-membered ring.

(c) Label the atoms on the ring fusions (the carbons that join each set of two rings together) as cis or trans to each other.

B
See all solutions

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