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Chapter 2: Problem 18

Provide an even more abbreviated formula for each structural formula, using parentheses and subscripts. (a) \(\left.\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2}\right|^{\mathrm{CHCH}_{3}}\) (b) (c)

Short Answer

Expert verified
Question: Simplify the given structural formula using parentheses and subscripts: \(\left.\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2}\right|^{\mathrm{CHCH}_{3}}\) Answer: The simplified formula is \(\mathrm{CH}_{3}(\mathrm{CH}_{2})_{4}\mathrm{CH}(\mathrm{CH}_{3})\).

Step by step solution

01

Identify repeating units

In this exercise, we need to find the repeating units in the given formula, which we can then represent using parentheses and subscripts. In this case, we see that the hydrocarbon chain contains five \(\mathrm{CH}_{2}\) groups, and there is one branch with two carbons connected to it.
02

Simplify the repeating units

Since there are five repeating units of \(\mathrm{CH}_{2}\), we can represent them using the notation \(\mathrm{CH}_{2}\). In the branch, we have two connected carbons, which can be represented as \(\mathrm{CHCH}_{3}\).
03

Combine the simplified repeating units

Now that we have simplified the hydrocarbon chain and branch, we can combine them into a single formula. Since the branch is connected to the chain, we can represent this using parentheses: \(\mathrm{CH}_{3}(\mathrm{CH}_{2})_{4}\mathrm{CH}(\mathrm{CH}_{3})\) The simplified formula for (a) is: $$\mathrm{CH}_{3}(\mathrm{CH}_{2})_{4}\mathrm{CH}(\mathrm{CH}_{3})$$

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Most popular questions from this chapter

What structural feature of cycloalkanes makes cis, trans isomerism in them possible?

Without consulting tables, arrange these compounds in order of decreasing (less negative) heat of combustion: hexane, 2-methylpentane, and 2 ,2-dimethylbutane.

For 1,2-dichloroethane: (a) Draw Newman projections for all eclipsed conformations formed by rotation from \(0^{\circ}\) to \(360^{\circ}\) about the carbon-carbon single bond. (b) Which eclipsed conformation (s) has (have) the lowest energy? Which has (have) the highest energy? (c) Which, if any, of these eclipsed conformations are related by reflection?

Following is a chair conformation of cyclohexane with the carbon atoms numbered 1 through \(6 .\) (a) Draw hydrogen atoms that are above the plane of the ring on carbons 1 and 2 and below the plane of the ring on carbon 4 . (b) Which of these hydrogens are equatorial? Which are axial? (c) Draw the alternative chair conformation. Which hydrogens are equatorial? Which are axial? Which are above the plane of the ring? Which are below it?

Draw structural formulas for all the following. (a) Alcohols with the molecular formula \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) (b) Aldehydes with the molecular formula \(\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}\) (c) Ketones with the molecular formula \(\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}\) (d) Carboxylic acids with the molecular formula \(\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}_{2}\)
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