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Ch.3 - Structure and Stereochemistry of Alkanes
Wade - Organic Chemistry 9th Edition
Wade9th EditionOrganic ChemistryISBN: 9780135213728Not the one you use?Change textbook
All textbooksWade 9th EditionCh.3 - Structure and Stereochemistry of AlkanesProblem 8c
Chapter 3, Problem 8c

Draw the structures of the following compounds.
c. 3,3-diethyl-4-(2,2-dimethylpropyl)octane

Verified step by step guidance
1
Identify the parent chain: The parent chain is 'octane', which means it has 8 carbon atoms in a continuous chain.
Number the carbon atoms in the parent chain: Start numbering from the end closest to the first substituent to ensure the lowest possible numbers for the substituents.
Locate and attach the substituents: At carbon 3, attach two ethyl groups (3,3-diethyl). At carbon 4, attach a 2,2-dimethylpropyl group.
Draw the substituents: An ethyl group is -CH2CH3, and a 2,2-dimethylpropyl group is a three-carbon chain with two methyl groups attached to the second carbon.
Combine the structure: Ensure all substituents are correctly attached to the main chain, and verify that the total number of carbon atoms matches the name of the compound.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

IUPAC Nomenclature

IUPAC nomenclature is a systematic method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry. It provides a standardized way to name compounds based on their structure, ensuring that each name is unique and descriptive. Understanding IUPAC rules is essential for interpreting and drawing chemical structures from names.
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Alkane Structure

Alkanes are hydrocarbons with only single bonds between carbon atoms, forming a saturated chain. The general formula for alkanes is CnH2n+2. Understanding the structure of alkanes, including straight chains and branched chains, is crucial for drawing and identifying compounds like octane, which is a straight-chain alkane with eight carbon atoms.
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Substituents in Organic Chemistry

Substituents are atoms or groups of atoms that replace hydrogen atoms in a hydrocarbon chain. They are named and positioned according to their location on the main carbon chain. In the given compound, '3,3-diethyl' and '4-(2,2-dimethylpropyl)' are substituents that modify the octane chain, and understanding their placement is key to drawing the correct structure.
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Related Practice
Textbook Question

Draw the structures of the following groups, and give their more common names.

a. the (1-methylethyl) group

b. the (2-methylpropyl) group

c. the (1-methylpropyl) group

d. the (1,1-dimethylethyl) group

e. the (3-methylbutyl) group, sometimes called the 'isoamyl' group

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Textbook Question

List each set of compounds in order of increasing boiling point.

b. Octane, (CH3)3C—C(CH3)3 and CH3CH2C(CH3)2CH2CH2CH3

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Textbook Question

List each set of compounds in order of increasing boiling point.

a. hexane, octane, and decane

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Textbook Question

Without looking at the structures, give molecular formulas for the compounds: (a) 4-(1,1-dimethylethyl)octane and (b) 5-(1,2,2-trimethylpropyl)nonane. Use the names of the groups to determine the number of carbon atoms; then use the (2n + 2) rule.

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Textbook Question

Draw the structures of the following compounds.

a. 4-(1,1-dimethylethyl)octane

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Textbook Question

Draw the structures of the following compounds.

b. 5-(1,2,2-trimethylpropyl)nonane

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