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Chapter 4: Q.5. (page 128)

Question: a. Which compounds (B–F) are identical to A? b. Which compounds (B–F) represent an isomer of A?

Short Answer

Expert verified

Answer

a. B, C, and E are identical to A.

b. D and F are isomers of A.

Step by step solution

01

Isomer

An isomer is represented by changing the location of groups or atoms of the main compound. It has the same molecular composition as the main compound.

An identical structure is obtained when the groups are at the same positions, and the number of carbon and hydrogen atoms is also the same.

02

Explanation

a. Compound A has a chain of six carbon atoms and a methyl group at the third position.

Compounds B, C, and E are identical to A because they all have a chain of six carbon atoms and a methyl group substituted at the third position.

b. Compound A has a total of seven carbon and sixteen hydrogen atoms. Therefore, the isomers of A are D and F because they both have the same number of carbon and hydrogen atoms.

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Most popular questions from this chapter

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?

Draw the staggered and eclipsed conformations that result from rotation around the C-C bond inCH3-CH2Br.

Question: Draw the five constitutional isomers that have molecular formula C5H10and contain one ring.

Question: Calculate the destabilization present in each eclipsed conformation.

a.

b.

Question: Read Appendix B on naming branched alkyl substituents, and draw all possible alkyl groups having the formula C5H11-. Give the IUPAC names for the eight compounds of molecular formula C10H20 that contain a cyclopentane ring with each of these alkyl groups as a substituent.
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