Textbook Question
The effectiveness of a barbiturate as a sedative is related to its ability to penetrate the nonpolar membrane of a cell. Which of the following barbiturates would you expect to be the more effective sedative?
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Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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Table of contents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 1)31
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 2)65
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
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Bruice 8th EditionCh. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and StructureProblem 41
Bruice 8th EditionCh. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and StructureProblem 41Chapter 4, Problem 41
Convert the following Newman projections to skeletal structures and name them.
a. 
b. 
Verified step by step guidance1
Examine the Newman projection carefully. Identify the front carbon (the circle) and the back carbon (the dot behind the circle). Note the substituents attached to each carbon and their relative positions (e.g., staggered or eclipsed).
Determine the connectivity of the substituents to the front and back carbons. Translate this information into a 2D skeletal structure by arranging the substituents around the carbons in the correct spatial orientation.
Draw the skeletal structure by representing the carbon chain as a zigzag line, with substituents branching off at the appropriate positions. Use wedges and dashes to indicate substituents that are coming out of or going into the plane of the paper, if necessary.
Verify the structure by ensuring that the connectivity and spatial arrangement of substituents in the skeletal structure match the Newman projection. Double-check for any stereochemical details, such as chirality centers, if present.
Name the compound according to IUPAC nomenclature rules. Identify the parent chain, number the carbons to give substituents the lowest possible numbers, and list substituents alphabetically in the name.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Newman Projections
Newman projections are a way to visualize the conformation of a molecule by looking straight down the bond connecting two carbon atoms. This representation helps in understanding the spatial arrangement of substituents around the bond, which is crucial for analyzing steric interactions and torsional strain in organic compounds.
Recommended video:
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00:34
Introduction to Drawing Newman Projections
Skeletal Structures
Skeletal structures, or line-angle formulas, are simplified representations of organic molecules where carbon atoms are represented by vertices and hydrogen atoms are often omitted for clarity. This format allows chemists to easily visualize the connectivity and functional groups within a molecule, making it essential for naming and understanding organic compounds.
Recommended video:
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04:03How bondline is different from Lewis Structures.
Nomenclature of Organic Compounds
The nomenclature of organic compounds follows specific rules set by the International Union of Pure and Applied Chemistry (IUPAC). This system provides a standardized way to name compounds based on their structure, including the longest carbon chain, functional groups, and substituents, which is vital for clear communication in chemistry.
Recommended video:
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01:40Defining meso compounds.
Related Practice
Textbook Question
Draw a potential-energy diagram for rotation about the C-2---C-3 bond of pentane through 360°, starting with the least stable conformer.
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Textbook Question
Using Newman projections, draw the most stable conformer for each of the following:
b. 3-methylhexane, viewed along the C-3----C-4 bond
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Textbook Question
Draw all the staggered and eclipsed conformers that result from rotation about the C-2-C-3 bond of pentane.
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Textbook Question
Using Newman projections, draw the most stable conformer for each of the following:
a. 3-methylpentane, viewed along the C-2---C-3 bond
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Textbook Question
Using Newman projections, draw the most stable conformer for each of the following:
c. 3,3-dimethylhexane, viewed along the C-3---C-4 bond
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