What is the systematic name of the molecule shown?
H₃C—CH₂—C(=O)—O—CH₂—CH₂—CH₃
(A) Butyl butanoate
(B) Propyl butanoate
(C) Butyl propanoate
(D) Propyl propanoate - HSC - SSCE Chemistry - Question 8 - 2011 - Paper 1
Question 8
What is the systematic name of the molecule shown?
H₃C—CH₂—C(=O)—O—CH₂—CH₂—CH₃
(A) Butyl butanoate
(B) Propyl butanoate
(C) Butyl propanoate
(D) Propyl propanoate
Worked Solution & Example Answer:What is the systematic name of the molecule shown?
H₃C—CH₂—C(=O)—O—CH₂—CH₂—CH₃
(A) Butyl butanoate
(B) Propyl butanoate
(C) Butyl propanoate
(D) Propyl propanoate - HSC - SSCE Chemistry - Question 8 - 2011 - Paper 1
Step 1
Identify the structure and functional groups in the molecule
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Answer
The given molecule has an ester functional group, indicated by the presence of a carbonyl (C=O) adjacent to an ether-like oxygen. The structure consists of a propanoate (from the three-carbon acid) and a butyl group (from the four-carbon alcohol).
Step 2
Determine the longest carbon chain
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Answer
The longest carbon chain connected to the carbonyl group is the butyl chain, which contains four carbon atoms. The side chain attached to the carbonyl group is a propanoate structure.
Step 3
Assign the systematic name
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Answer
Since the longer carbon chain is butyl and the acid part is derived from propanoic acid, the systematic name of the molecule is 'Butyl propanoate'.
