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Chapter 22: Problem 20

Draw a structural formula for each of the following compounds. $$ \begin{array}{ll}{\text { a. } 2,2-\text { dimethylheptane }} & {\text { c. } 3,3 \text { -dimethylheptane }} \\ {\text { b. } 2,3 \text { -dimethylheptane }} & {\text { d. } 2,4 \text { -dimethylheptane }}\end{array} $$

Short Answer

Expert verified
The structural formulas for the given dimethylheptane isomers are as follows: a. 2,2-dimethylheptane: \(CH_3-CH(CH_3)-CH_2-CH_2-CH_2-CH_2-CH_3\) b. 2,3-dimethylheptane: \(CH_3-CH(CH_3)-CH(CH_3)-CH_2-CH_2-CH_2-CH_3\) c. 3,3-dimethylheptane: \(CH_3-CH_2-CH(CH_3)-CH(CH_3)-CH_2-CH_2-CH_3\) d. 2,4-dimethylheptane: \(CH_3-CH(CH_3)-CH_2-CH(CH_3)-CH_2-CH_2-CH_3\)

Step by step solution

01

Identify the main chain and substituents

In all of these cases, we have a heptane chain which has 7 carbon atoms and two methyl groups as substituents. The numbering of the carbon atoms in the name tells us the positions of the two methyl groups on the heptane chain.
02

Draw the structural formula for 2,2-dimethylheptane

According to the name, both methyl groups are attached to the second carbon of the heptane chain. The structural formula is: CH3-CH(CH3)-CH2-CH2-CH2-CH2-CH3
03

Draw the structural formula for 2,3-dimethylheptane

According to the name, there is one methyl group attached to the second carbon and another to the third carbon of the heptane chain. The structural formula is: CH3-CH(CH3)-CH(CH3)-CH2-CH2-CH2-CH3
04

Draw the structural formula for 3,3-dimethylheptane

According to the name, both methyl groups are attached to the third carbon of the heptane chain. The structural formula is: CH3-CH2-CH(CH3)-CH(CH3)-CH2-CH2-CH3
05

Draw the structural formula for 2,4-dimethylheptane

According to the name, there is one methyl group attached to the second carbon and another to the fourth carbon of the heptane chain. The structural formula is: CH3-CH(CH3)-CH2-CH(CH3)-CH2-CH2-CH3 Now we have drawn the structural formula for each of the dimethylheptane isomers according to their names given in the exercise.

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Most popular questions from this chapter

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