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Chapter 21: Q5. (page 821)

Question: Give the IUPAC name for each ketone.

a.

b.

c.

Short Answer

Expert verified

Answer

  1. 2-cyclohexylpentan-3-one
  2. 3-tert-butyl-2-methylcyclopentanone
  3. 2,2,4,4-tetramethylpentan-3-one

Step by step solution

01

Step-by-Step Solution Step 1: IUPAC naming for carbonyl group

The numbering starts from the first carbon of the longest chain in which the ketone group is included. The suffix “one” suffix is used after the parent name.

02

IUPAC names of a, b and c

a. The given compound has five carbon atoms in a chain. Ketone and cyclohexyl groups are attached to C-3 and C-2 atoms, respectively.

The IUPAC of the given compound is shown below:

2-cyclohexylpentan-3-one

b. The given compound has five carbon atoms in a cyclic form. Ketone group, tert butyl, and methyl group are attached to C-1, C-3, and C-2 atoms, respectively.

The IUPAC of the given compound is shown below:

3-tert-butyl-2-methylcyclopentanone

c. The given compound has five carbon atoms in a chain. Ketone group and two methyl groups are attached to C-1 and C-2, C-4 atoms, respectively.

The IUPAC of the given compound is shown below:

2,2,4,4-tetramethylpentan-3-one

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Most popular questions from this chapter

Question: The boiling point of butan-2-one ( 80 °C ) is significantly higher than the boiling point of diethyl ether (35 °C ), even though both compounds exhibit dipole–dipole interactions and have comparable molecular weights. Offer an explanation

Question: Give the IUPAC name for each aldehyde.

  1. 2-isobutyl-3-isopropylhexanal
  2. trans-3-methylcyclopentanecarbaldehyde
  3. 1-methylcyclopropanecarbaldehyde

4. 3,6-diethylnonanal

Devise a synthesis of each compound from ethanol as the only source of carbon atoms. You may use any other organic or inorganic reagents you choose.

Question: Which carbonyl group in each pair absorbs at a higher frequency?

a.

b.

Question: Give the structure corresponding to each name:

(a) sec-butyl ethyl ketone

(b) methyl vinyl ketone

(c) p-ethylacetophenone

(d) 3-benzoyl-2-benzylcyclopentanone

(e) 6,6-dimethylcyclohex-2-enone

(f) 3-ethylhex-5-enal
See all solutions

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