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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: Convert each three-dimensional model to a Newman projection around the indicated bond.

Question: a.Draw the three staggered and three eclipsed conformations that result from rotation around the bond labeled in red using Newman projections. b. Label the most stable and least stable conformation.

Question: When two six-membered rings share a C-C bond, this bicyclic system is called decalin. There are two possible arrangements: trans-decalin having two hydrogen atoms at the ring fusion on opposite sides of the rings, and cis-decalin having the two hydrogens at the ring fusion on the same side.

  1. Draw trans- and cis-decalin using the chair form for the cyclohexane rings.
  2. The trans isomer is more stable. Explain why.

Question: a. Draw the anti and gauche conformations for ethylene glycol (OHCH2CH2OH).

b. Ethylene glycol is unusual in that the gauche conformation is more stable than the anti conformation. Offer an explanation.

Question: Cholic acid, a compound called a bile acid, is converted to a bile salt in the body. Bile salts have properties similar to soaps, and they help transport lipids through aqueous solutions. Explain why this is so.
See all solutions

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