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Chapter 24: Problem 15

Give the the name or condensed structural formula, as appropriate:(c) 2 -methylheptane (d) 4 -ethyl- 2,3 -dimethyloctane (e) 1,2 -dimethylcyclohexane

Short Answer

Expert verified
The condensed structural formulas are as follows: (c) 2-methylheptane: CH3-CH(CH3)-CH2-CH2-CH2-CH2-CH3 (d) 4-ethyl-2,3-dimethyloctane: CH3-CH(CH3)-CH(CH3)-CH(C2H5)-CH2-CH2-CH2-CH3 (e) 1,2-dimethylcyclohexane: For this compound, it's better to draw the structure instead of using a condensed formula. The structure has a cyclohexane ring with methyl groups at carbons 1 and 2.

Step by step solution

01

(Compound c: 2-methylheptane)

1. Identify the parent chain: In this case, it’s "heptane," indicating a 7-carbon chain. 2. Identify the substituent and its position: The substituent is a "methyl" group and its position is at carbon-2. 3. Write the condensed structural formula: We add the methyl group to the second carbon of the heptane chain. The condensed structural formula becomes: CH3-CH(CH3)-CH2-CH2-CH2-CH2-CH3.
02

(Compound d: 4-ethyl-2,3-dimethyloctane)

1. Identify the parent chain: The parent chain is "octane," indicating an 8-carbon chain. 2. Identify the substituents and their positions: The substituents are an "ethyl" group at carbon-4, and two "methyl" groups at carbons 2 and 3. 3. Write the condensed structural formula: We add the substituents to the corresponding carbon atoms in the octane chain. The condensed structural formula becomes: CH3-CH(CH3)-CH(CH3)-CH(C2H5)-CH2-CH2-CH2-CH3.
03

(Compound e: 1,2-dimethylcyclohexane)

1. Identify the parent chain: The parent chain is "cyclohexane," indicating a 6-carbon cyclic structure. 2. Identify the substituents and their positions: The substituents are two "methyl" groups at carbons 1 and 2. 3. Write the condensed structural formula: We add the methyl groups to the corresponding carbon atoms in the cyclohexane ring. The condensed structural formula becomes: CH3C(CH3)-CH₂-CH₂-CH₂-CH₂. In this case, we use a ring structure to represent the cyclohexane; so, it's better to draw the structure instead of using a condensed formula.

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Most popular questions from this chapter

Glutathione is a tripeptide found in most living cells. Partial hydrolysis yields Cys-Gly and Glu-Cys. What structures are possible for glutathione?

Draw the condensed structures of the compounds formed from (a) butanoic acid and methanol, (b) benzoic acid and 2-propanol, (c) propanoic acid and dimethylamine. Name the compound in each case.

Give the molecular formula of a hydrocarbon containing five carbon atoms that is (a) an alkane, (b) a cycloalkane, (c) an alkene, (d) an alkyne. Which are saturated and which are unsaturated hydrocarbons?

(a) Draw the condensed structure of the tripeptide Gly-GlyHis. (b) How many different tripeptides can be made from the amino acids glycine and histidine? Give the abbreviations for each of these tripeptides, using the three-letter and one-letter codes for the amino acids.

Why is geometric isomerism possible for alkenes but not for alkanes and alkynes?
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