Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Textbook Question
Chapter 5, Problem 51P
(Use models co solve this problem.) Write conformational structures for all of the stereoisomers of 1,3-diethylcyclohexane. Label pairs of enantiomers and meso compounds if they exist.
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3)- Determine the total number of conformers and draw the Chair Structures of the conformers for the Tri-substituted
cyclohexane structure given below (i.e., "A"). Draw the relative energy diagram for the possible conformers for the
cyclohexane structure below. Note, draw only the required structures for the conformers of A. Also, include
hydrogen atoms wherever there are substituents on all of your chair conformers.
Answer (Total #of Conformers):
Chair Structures:
Relative Energy Diagram
8 bas roll
3
The energy difference between a tert-butyl group going from equatorial to axial in a cyclohexane is 18.3 kJ/mol. When two of the carbon atoms are replaced with oxygen atoms (molecule B) the energy difference between the two chair conformations drops to 5.9 kJ/mol. Explain this difference. (Hint: Consider what makes putting groups axial unfavorable).
It is easy to imagine a cyclohexane as a flat hexagon and a lot of the time we draw it
that way. Looking at 1,3,5-triethylcyclohexane we cannot tell the stability of the
molecule from looking at the flat 2D drawing. Explain why we need to look at the 3D
configuration and what conformation (axial,equatorial) would each of the three ethyl
groups be in for the most stable configuration.
Chapter 5 Solutions
Organic Chemistry
Ch. 5 - Prob. 1PPCh. 5 - Prob. 2PPCh. 5 - Prob. 3PPCh. 5 - Prob. 4PPCh. 5 - Prob. 5PPCh. 5 - Prob. 6PPCh. 5 - Prob. 7PPCh. 5 - Practice Problem 5.8 Write three-dimensional...Ch. 5 - Prob. 9PPCh. 5 - Prob. 10PP
Ch. 5 - Practice Problem 5.11 List the substituents in...Ch. 5 - Prob. 12PPCh. 5 - Practice Problem 5.13 Tell whether the two...Ch. 5 - Prob. 14PPCh. 5 - Prob. 15PPCh. 5 - Prob. 16PPCh. 5 - Prob. 17PPCh. 5 - Prob. 18PPCh. 5 - Prob. 19PPCh. 5 - Prob. 20PPCh. 5 - Practice Problem 5.21 The following are formulas...Ch. 5 - Practice Problem 5.22 Write three-dimensional...Ch. 5 - Prob. 23PPCh. 5 - Practice Problem 5.24 Give names chat include (R)...Ch. 5 - Prob. 25PPCh. 5 - Prob. 26PPCh. 5 - Prob. 27PPCh. 5 - Prob. 28PPCh. 5 - Practice Problem 5.29 Write formulas for all of...Ch. 5 - Prob. 30PPCh. 5 - Prob. 31PPCh. 5 - Prob. 32PPCh. 5 - Prob. 33PCh. 5 - Prob. 34PCh. 5 - 5.35 Designate the (R) or (S) configuration at...Ch. 5 - Prob. 36PCh. 5 - (a) Write the structure of...Ch. 5 - Shown below are Newman projection formulas for...Ch. 5 - 5.39 Write appropriate structural formulas...Ch. 5 - Discuss whether each of the following compounds...Ch. 5 - Prob. 42PCh. 5 - Prob. 43PCh. 5 - Compound F has the molecular formula C5H8 and is...Ch. 5 - Prob. 45PCh. 5 - Prob. 46PCh. 5 - Prob. 47PCh. 5 - For the following molecule, draw its enantiomer as...Ch. 5 - 5.49 (Use models to solve this...Ch. 5 - 5.50 (Use models to solve this...Ch. 5 - (Use models co solve this problem.) Write...Ch. 5 - 5.52 Tartaric acid was an important compound in...Ch. 5 - Prob. 53PCh. 5 - Prob. 54PCh. 5 - Prob. 55PCh. 5 - Prob. 1LGPCh. 5 - Prob. 2LGPCh. 5 - Prob. 3LGP
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- I don't understand why the first one and second one are cis and trans respectively. Wouldn't the first one be trans-1,2-dimethylcyclobutane because the torsional strain wouldn't allow the carbons to be in the same conformation. Meaning one of the carbons would be up and then the next would be down and so on. Since both methyl groups are equatorial and the first and second carbons are arranged up and down, wouldn't it be trans. Same logic for the second molecule. Carbon 1, which is attached to the methyl is down, carbon 3 which is attached to the methyl should be down also because of torsional strain, and since both methyl are in axial (or equatorial?), it would be cis. Or is it based off of the way the carbons are positioned in the picture?arrow_forwardQuestion 13 The most stable conformation of line structure X is но ÕH ****** Bu Et H Bu H. Bu Me H 'Bu! Bu HO H OH 'Bu H Et FOH HO OH Ét Me H HO H ÓH I HPOH Ét H OH ÓH Et Me VI II IV V O IV O V None of the given optionsarrow_forwardHello, I was reading an answer from the book Organic Chemistry by Brown et al. The question is 2.51 "Draw alternative chair conformations for each substituted cyclohexane and state which chair is more stable." There are then 4 cyclohexanes (labeled a-d). For the "a" cyclohexane, the substituents are arranged as a combination of axial and equatorial in both chair conformations. However, for the "b," "c," and "d," cyclohexanes one chair has only equatorial substituents, and the other chair has only axial substituents. Why is the "a" chair conformation different? https://www.bartleby.com/solution-answer/chapter-2-problem-251p-organic-chemistry-8th-edition/9781305580350/draw-alternative-chair-conformations-for-each-substituted-cyclohexane-and-state-which-chair-is-more/4532cd91-c341-11e9-8385-02ee952b546earrow_forward
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Chapter 4 Alkanes and Cycloalkanes Lesson 2; Author: Linda Hanson;https://www.youtube.com/watch?v=AL_CM_Btef4;License: Standard YouTube License, CC-BY
Chapter 4 Alkanes and Cycloalkanes Lesson 1; Author: Linda Hanson;https://www.youtube.com/watch?v=PPIa6EHJMJw;License: Standard Youtube License