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Magazine Chapter 21: Q5. (page 821)
Question: Give the IUPAC name for each ketone.
a. 
b. 
c. 
Short Answer
Answer
- 2-cyclohexylpentan-3-one
- 3-tert-butyl-2-methylcyclopentanone
- 2,2,4,4-tetramethylpentan-3-one
Step by step solution
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.
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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