How many esters are possible for C4H8O2 ?
Correct answer: C. 4
- A. 2
- B. 3
- C. 4
- D. 5
Explanation
The correct answer is 4. To determine the number of possible esters, we must consider different ways to arrange a four-carbon skeleton and the position of the ester linkage. For C4H8O2, the possible esters include: propyl formate, ethyl acetate, methyl propionate, and isopropyl formate. Each structure has a unique carbon arrangement or ester linkage position, making them distinct isomers.Options A and B list fewer esters because they do not account for all possible carbon skeleton variations. Option D suggests an extra isomer that cannot be formed with the given formula.
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Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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