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Chapter 4: Q.42. (page 128)

Question: Give the IUPAC name for each compound.

Short Answer

Expert verified

Answer

  1. 4-isopropylheptane
  2. 3-ethyl-3-methylpentane
  3. 4,4-diethyl-5-methyloctane

Step by step solution

01

Newman projection

The two bonded carbons show a Newman projection with their groups.

02

IUPAC names

a. The given Newman structure has two bonded carbon atoms. The first priority is given to that carbon where the tri substitution of the carbon is located. Therefore, the correct name and structure are shown as:


4-isopropylheptane

b. The given Newman structure has two bonded carbon atoms. The first priority is given to that carbon where the tri substitution of the carbon is located. Therefore, the correct name and structure are shown as:

3-ethyl-3-methylpentane

c. The given Newman structure has two bonded carbon atoms. The first priority is given to that carbon where the bulky substituents are located. Therefore, the correct name and structure are shown as:

4,4-diethyl-5-methyloctane

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Most popular questions from this chapter

Question: Draw the five constitutional isomers having molecular formula C6H14.

Question: Draw the structure of all compounds that fit the following descriptions. a. Five constitutional isomers having the molecular formula C4H8b. Nine constitutional isomers having the molecular formula C7H16c. Twelve constitutional isomers having the molecular formula C6H12 and containing one ring

Question: Glucose is a simple sugar with five substituents bonded to a six-membered ring.

a. Using a chair representation, draw the most stable arrangement of these substituents on the six-membered ring.

b. Convert this representation into one that uses a hexagon with wedges and dashed wedges.

c. Draw a constitutional isomer of glucose.

d. Draw a stereoisomer that has an axial OH group on one carbon.

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?

Question: Give the structure corresponding to each IUPAC name.

  1. 3-methylhexane
  2. 3,3-dimethylpentane
  3. 3,5,5-trimethyloctane
  4. 3-ethyl-4-methylhexane
  5. 3-ethyl-5-isobutylnonane
See all solutions

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