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Chapter 21: Q4. (page 819)

Question: Give the IUPAC name for each aldehyde.

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

4. 3,6-diethylnonanal

Short Answer

Expert verified

Answer

a.

b.

c.

d.

Step by step solution

01

Step-by-Step Solution Step 1: IUPAC name of the carbonyl group

The first priority or number is given to the carbon of the carbonyl group. The suffix “al” is used in the parent name.

02

Structures of a, b, c, and d

a. The given compound has six carbon atoms in a chain. Aldehyde group, isobutyl group, and isopropyl group are attached to C-1, C-2, and C-3 atoms, respectively.

The structure of the given compound is shown below:

trans-3-methylcyclopentanecarbaldehyde

b. The given compound is composed of five carbon atoms in a cyclic form. Aldehyde group and methyl group are attached to C-1 and C-3 atoms, respectively. Both have different orientations in space.

The structure of the given compound is shown below:

trans-3-methylcyclopentanecarbaldehyde

c. The given compound has three carbon atoms in a cyclic form. Aldehyde group and methyl group are attached to the C-1 atom.

The structure of the given compound is shown below:

1-methylcyclopropanecarbaldehyde

d. The given compound has nine carbon atoms in a chain. Aldehyde group and ethyl groups are attached to C-1 and C-3, C-6 atoms, respectively.

The structure of the given compound is shown below:

3,6-diethylnonanal

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Most popular questions from this chapter

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

What reagents are needed to convert each compound into butanal (\({\bf{C}}{{\bf{H}}_{\bf{3}}}{\bf{C}}{{\bf{H}}_{\bf{2}}}{\bf{C}}{{\bf{H}}_{\bf{2}}}{\bf{CHO}}\))?

a.

b.

c.

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.

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

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
See all solutions

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