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Chapter 4: Q.2. (page 128)

Question: Which of the following is not another representation for 2-methylbutane?

a.

b.

c.

d.

Short Answer

Expert verified

Answer

Compound d does not represent the structure of 2-methylbutane.

Step by step solution

01

2-Methylbutane

2-Methylbutane has a chain of four carbon atoms. The second position is occupied by the methyl group.

If the longest chain does not contain any functional group, counting can be started from any side. In either case, the same structure is obtained.

02

Explanation

  1. In the given compound, a chain of four carbon atoms with the methyl group at the second position is present. Therefore, it is the structure of 2-methylbutane.
  2. In the given compound, a chain of four carbon atoms with the methyl group at the second position is present. Therefore, it is the structure of 2-methylbutane.
  3. In the given compound, a chain of four carbon atoms with the methyl group at the second position is present. Therefore, it is the structure of 2-methylbutane.
  4. In this given compound, a chain of four carbon atoms with the methyl group at the first position is present. Therefore, it is not the structure of 2-methylbutane.

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Most popular questions from this chapter

Question: Draw the two possible chair conformations for cis-1,3-dimethylcyclohexane. Which conformation, if either, is more stable?

Question: Draw the staggered and eclipsed conformations that result from rotation around the C-C bond in CH3-CH2Br.

Question: Give the IUPAC name for each of the five constitutional isomers of molecular formula C6H14 in Problem 4.3.

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

a.

b.

Question: The torsional energy in propane is 14 kJ/mol (3.4 kcal/mol). Because each H,H eclipsing interaction is worth 4.0 kJ/mol (1.0 kcal/mol) of destabilization, how much is one H, CH3 eclipsing interaction worth in destabilization? (See Section 4.10 for an alternate way to arrive at this value.)
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