QuestionJune 28, 2025

How many cycloalkane constitutional isomers are there with molecular formula C_(5)H_(10) Select the single best answer. (Stereoisomers are not constitutional isomers.) 4 3 5 2

How many cycloalkane constitutional isomers are there with molecular formula C_(5)H_(10) Select the single best answer. (Stereoisomers are not constitutional isomers.) 4 3 5 2
How many cycloalkane constitutional isomers are there with molecular formula C_(5)H_(10) Select the single best answer. (Stereoisomers are not
constitutional isomers.)
4
3
5
2

Solution
4.7(246 votes)

Answer

5 Explanation 1. Identify the cycloalkane structure Cycloalkanes are saturated cyclic hydrocarbons. For C_5H_{10}, the basic structure is a five-membered ring, cyclopentane. 2. Consider possible ring sizes and substituents Smaller rings can have substituents. A four-membered ring (cyclobutane) can have one methyl group, and a three-membered ring (cyclopropane) can have two ethyl groups or one propyl group. 3. List all possible structures 1. Cyclopentane 2. Methylcyclobutane 3. 1,1-Dimethylcyclopropane 4. Ethylcyclopropane 5. Propylcyclopropane

Explanation

1. Identify the cycloalkane structure<br /> Cycloalkanes are saturated cyclic hydrocarbons. For $C_5H_{10}$, the basic structure is a five-membered ring, cyclopentane.<br /><br />2. Consider possible ring sizes and substituents<br /> Smaller rings can have substituents. A four-membered ring (cyclobutane) can have one methyl group, and a three-membered ring (cyclopropane) can have two ethyl groups or one propyl group.<br /><br />3. List all possible structures<br /> 1. Cyclopentane<br /> 2. Methylcyclobutane<br /> 3. 1,1-Dimethylcyclopropane<br /> 4. Ethylcyclopropane<br /> 5. Propylcyclopropane
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