Textbook Question
Draw the structure that corresponds with each name.
i. tert-butylcyclohexane
j. pentylcyclohexane
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Ch.3 - Structure and Stereochemistry of Alkanes
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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Table of contents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Chapter 3, Problem 36e,f
Draw the structure that corresponds with each name.
e. 2,2,4,4-tetramethylhexane
f. trans-1,3-diethylcyclopentane
Verified step by step guidance1
To draw 2,2,4,4-tetramethylhexane, start by identifying the parent chain. The parent chain is 'hexane', which means it has 6 carbon atoms in a straight chain.
Next, identify the substituents. The name '2,2,4,4-tetramethyl' indicates that there are four methyl groups attached to the parent chain. Two methyl groups are attached to carbon 2, and two are attached to carbon 4.
Draw the hexane chain by arranging six carbon atoms in a linear sequence. Then, add the methyl groups: two on the second carbon and two on the fourth carbon.
For trans-1,3-diethylcyclopentane, start by drawing the cyclopentane ring, which is a five-membered carbon ring.
Identify the substituents: '1,3-diethyl' means there are ethyl groups attached to carbons 1 and 3. The 'trans' configuration indicates that these ethyl groups are on opposite sides of the cyclopentane ring. Draw the ethyl groups accordingly, ensuring they are on opposite sides of the plane of the ring.
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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 standardized system for naming chemical compounds. It involves identifying the longest carbon chain, numbering the chain to give substituents the lowest possible numbers, and naming substituents as prefixes. Understanding this system is crucial for interpreting and drawing structures from chemical names.
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The different parts of an IUPAC name
Structural Isomers
Structural isomers are compounds with the same molecular formula but different structural arrangements. In organic chemistry, recognizing how substituents can be arranged differently on a carbon skeleton is essential for drawing accurate structures, as seen in compounds like 2,2,4,4-tetramethylhexane.
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Stereochemistry
Stereochemistry involves the study of spatial arrangement of atoms in molecules. Terms like 'trans' indicate specific geometric configurations, where substituents are on opposite sides of a ring or double bond. Understanding stereochemistry is vital for accurately depicting molecules like trans-1,3-diethylcyclopentane.
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Related Practice
Textbook Question
Each of the following descriptions applies to more than one alkane. In each case, draw and name two structures that match the description.
a. an isopropylheptane
b. a diethyldecane
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Textbook Question
Draw the structure that corresponds with each name.
c. sec-butylcycloheptane
d. 2,3-dimethyl-4-propylnonane
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Textbook Question
Draw the structure that corresponds with each name.
a. 3-ethyloctane
b. 4-isopropyldecane
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Textbook Question
Draw and name the five cycloalkane structures of formula C5H10. Can any of these structures give rise to geometric (cis-trans) isomerism? If so, show the cis and trans stereoisomers.
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Textbook Question
Each of the following descriptions applies to more than one alkane. In each case, draw and name two structures that match the description.
c. a cis-diethylcyclohexane
d. a trans-dihalocyclopentane
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