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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: Give IUPAC name of each compound.

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Question: a. Using Newman projections, draw all staggered and eclipsed conformations that result from rotation around the bond highlighted in pink in each molecule;

b. draw a graph of energy versus dihedral angle for rotation around this bond.

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

Question: Answer the following questions about compound A, which contains a -CH3group and OH group bonded to the carbon skeleton that consists of three six-membered rings in the conformation shown.

a. Are the -CH3and OH groups oriented cis or trans to each other?

b. Is a substituent on localid="1648626189057" Cathat is cis to the CH3 group located in the axial or equatorial position?

c. Is an equatorial Br at Cboriented cis or trans to the OH group?

d. Is the H atom on Cclocated cis or trans to the OH group?

e. Is a substituent on Cdthat is trans to the OH group located in the axial or equatorial position?

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