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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 鈥渙ne鈥� 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

Devise a synthesis of each compound from the given starting materials. You may also use organic alcohols having four or fewer carbons, and any organic or inorganic reagents

(a)

(b)

(c)

Question: Rank the following compounds in order of increasing reactivity towards nucleophilic attack.

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

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Question: Give the IUPAC name (including any E,Z designation) for each unsaturated aldehyde. Neral is obtained from lemon grass, and cucumber aldehyde (Problem 1.30) contributes to the aroma of a fresh mango.

a.

b.
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