Textbook Question
For each of the following structures, which staggered Newman projection skeleton from Assessment 3.51 should you draw first to show what is seen when looking down the indicated bond?
(d) <IMAGE>
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Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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Table of contents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases: Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes I: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes II: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification I: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification II: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution I: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems I: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems II: Pericyclic Reactions54
- Ch. 23 - Benzene I: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene II: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Not the one you use?Change textbook
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Mullins 1st EditionCh. 3 - Alkanes and Cycloalkanes: Properties and Conformational AnalysisProblem 53b
Mullins 1st EditionCh. 3 - Alkanes and Cycloalkanes: Properties and Conformational AnalysisProblem 53bChapter 2, Problem 53b
Given the following structures, show the Newman projection that would result from looking down the indicated bond in the direction shown. [Orient yourself as if you were the eyeball looking down the bond. Some of the examples have been partially completed for you to fill in the rest.]
(b) <IMAGE>
Verified step by step guidance1
Step 1: Identify the bond that you are instructed to look down. This is the bond between two specific atoms in the molecule, as indicated in the problem. Orient yourself as if you are the 'eyeball' looking directly along this bond.
Step 2: Determine the groups attached to the front carbon (the carbon closest to your viewpoint). These groups will be represented as three substituents radiating outward in the Newman projection.
Step 3: Determine the groups attached to the rear carbon (the carbon furthest from your viewpoint). These groups will also be represented as three substituents radiating outward in the Newman projection, but they will appear behind the front carbon.
Step 4: Arrange the substituents on both the front and rear carbons based on their spatial orientation in the molecule. Use wedge and dash notation from the original structure to determine whether groups are pointing toward or away from you.
Step 5: Draw the Newman projection by placing the front carbon as a circle with its three substituents radiating outward, and the rear carbon as a larger circle behind it with its three substituents radiating outward. Ensure the relative positions of the substituents match the original molecular structure.
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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 a 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:
Guided course
00:34
Introduction to Drawing Newman Projections
Conformational Analysis
Conformational analysis involves studying the different spatial arrangements of atoms in a molecule that can be interconverted by rotation around single bonds. This analysis is essential for predicting the stability of various conformers, as certain arrangements may lead to increased steric hindrance or torsional strain, affecting the molecule's reactivity and properties.
Recommended video:
Guided course
03:29Understanding what a conformer is.
Steric Hindrance
Steric hindrance refers to the repulsion between atoms or groups within a molecule that occurs when they are brought close together. In the context of Newman projections, understanding steric hindrance is vital for predicting which conformations are more stable, as bulky groups can create unfavorable interactions that influence the overall energy of the molecule.
Recommended video:
Guided course
02:53Understanding steric effects.
Related Practice
Textbook Question
Given the first Newman projection and the direction and degree of rotation, fill in the resulting Newman projection. [One substituent has been labeled for you.]
(l)
1451
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Textbook Question
Given the following structures, show the Newman projection that would result from looking down the indicated bond in the direction shown. [Orient yourself as if you were the eyeball looking down the bond. Some of the examples have been partially completed for you to fill in the rest.]
(i) <IMAGE>
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Textbook Question
Given the following structures, show the Newman projection that would result from looking down the indicated bond in the direction shown. [Orient yourself as if you were the eyeball looking down the bond. Some of the examples have been partially completed for you to fill in the rest.]
(j) <IMAGE>
1364
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Textbook Question
Given the first Newman projection and the direction and degree of rotation, fill in the resulting Newman projection. [One substituent has been labeled for you.]
(h)
1540
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Textbook Question
Given the following structures, show the Newman projection that would result from looking down the indicated bond in the direction shown. [Orient yourself as if you were the eyeball looking down the bond. Some of the examples have been partially completed for you to fill in the rest.]
(k) <IMAGE>
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