Organic Chemistry
11th Edition
ISBN: 9781118133576
Author: T. W. Graham Solomons, Craig Fryhle
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 4, Problem 6Q
Which isomer of 1,3-dimethylcyclohexane is more stable?
(a) cis
(b) trans
(c) Both are equally stable
(d) Impossible to tell
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There are four cis,trans isomers of 2-isopropyl-5-methylcyclohexanol:(a) Using a planar hexagon representation for the cyclohexane ring, draw structural formulas for the four cis,trans isomers.(b) Draw the more stable chair conformation for each of your answers in part (a).(c) Of the four cis,trans isomers, which is most stable? (Hint: If you answered thispart correctly, you picked the isomer found in nature and given the name menthol.)
(a) Draw the most stable chair conformers of trans-1,3-diisopropylcyclohexane and trans-1,4-diisopropylcyclohexane.
(b) Which is more stable: trans-1,3-diisopropylcyclohexane or trans-1,4-diisopropylcyclohexane?
For 1,2-dichloroethane:
(a) Draw Newman projections for all eclipsed conformations formed
by rotation from 0 to 360° about the carbon-carbon single bond.
(b) Which eclipsed conformation(s) has the lowest energy? Which
has the highest energy?
(c) Which, if any, of these eclipsed conformations are related by
reflection?
Chapter 4 Solutions
Organic Chemistry
Ch. 4 - Prob. 1PPCh. 4 - Which structure does not represent...Ch. 4 - Prob. 3PPCh. 4 - Draw bond-line formulas for all of the isomers of...Ch. 4 - Prob. 5PPCh. 4 - Draw bond-line formulas and give IUPAC...Ch. 4 - Draw bond-line formulas and give IUPAC...Ch. 4 - Practice Problem 4.8 Give names for the following...Ch. 4 - Prob. 9PPCh. 4 - Prob. 10PP
Ch. 4 - Prob. 11PPCh. 4 - Give the structures and IUPAC names for all the...Ch. 4 - Prob. 13PPCh. 4 - Practice Problem 4.14 Show by a calculation (using...Ch. 4 - Practice Problem 4.15 Write structures for the cis...Ch. 4 - Practice Problem 4.16
(a) Write structural...Ch. 4 - Practice Problem 4.17 Write a conformational...Ch. 4 - Practice Problem 4.18
(a) Write the two...Ch. 4 - Prob. 19PPCh. 4 - Practice Problem 4.20 (a) What is the index of...Ch. 4 - Practice Problem 4.21
Zingiberene, a fragrant...Ch. 4 - Practice Problem 4.22 Carbonyl groups also count...Ch. 4 - Prob. 23PCh. 4 - Give systematic IUPAC names for each of the...Ch. 4 - Prob. 25PCh. 4 - Write the structure and give the IUPAC systema.tic...Ch. 4 - 4.27. Write the structure(s) of the simplest...Ch. 4 - Prob. 28PCh. 4 - 4.29. Write structures for the following...Ch. 4 - Prob. 30PCh. 4 - A spiro ring junction is one where two rings that...Ch. 4 - 4.32. Tell what is meant by a homologous series...Ch. 4 - Four different cycloalkenes will all yield...Ch. 4 - 4.34. (a) Three different alkenes yield...Ch. 4 - Prob. 35PCh. 4 - Prob. 36PCh. 4 - 4.37. Write the structures of two chair...Ch. 4 - Prob. 38PCh. 4 - Without referring to tables, decide which member...Ch. 4 - Prob. 40PCh. 4 - 4.41. Which compound would you expect to be the...Ch. 4 - Prob. 42PCh. 4 - 4.43. Write the two chair conformations of each of...Ch. 4 - Provide an explanation for the surprising fact...Ch. 4 - Prob. 45PCh. 4 - 4.46. Specify the missing compounds and/or...Ch. 4 - Consider the cis and trans isomers of...Ch. 4 - Prob. 48PCh. 4 - Open the energy-minimized 3D Molecular Models on...Ch. 4 - 4.50. Open the 3D Molecular Models on the book’s...Ch. 4 - 4.51. Open the 3D Molecular Model on the book’s...Ch. 4 - 1. The predominant conformation for D-glucose is...Ch. 4 - Prob. 2LGPCh. 4 - When 1,2-dimethylcyclohexene is allowed to react...Ch. 4 - Prob. 4LGPCh. 4 - Prob. 1QCh. 4 - Select the correct name of the compound whose...Ch. 4 - Select the correct name of the compound whose...Ch. 4 - Prob. 4QCh. 4 - 4.5 How many isomers are possible for C3H7Br?
(a)...Ch. 4 - 4.6 Which isomer of 1,3-dimethylcyclohexane is...Ch. 4 - 4.7. Which is the lowest energy conformation of...Ch. 4 - Supply the missing structuresCh. 4 - Supply the missing reagents in the box:Ch. 4 - The most stable conformation of...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Draw the most stable conformation of cis-1-tert-butyl-3-ethylcyclohexane. (a) (b) trans-1-tert-butyl-2-methylcyclohexane. (c) trans-1-tert-butyl-3-(1,1-dimethylpropyl)cyclohexane.arrow_forwardGiven the structures of the following two tetramethylcyclohexanes: CH3 CH3 H3C" CH3 H3C" CH3 CH3 CH3 A B (a) Draw the most stable chair conformation for both A and B. Which structure is lower in energy (most stable)? (b) Ring flip the above structures and draw the least stable chair conformation for both A and B. Which structure is highest in energy (least stable)?arrow_forwardWhich of the following compounds can exist as pairs of cis-trans isomers? Draw each cis-trans pair, and indicate the geometry of each isomer. (a) CH3CH=CH2 (b) (CH3)2C=CHCH3 (c) CH3CH2CH=CHCH3 (d) (CH3)2C=C(CH3)CH2CH3 (e) ClCH=CHCl (f) BrCH=CHClarrow_forward
- Which of the following cycloalkanes show cis-trans isomerism? For each thatdoes, draw both isomers. (a) Methylcyclopentane(c) 1,3-Dimethylcyclobutane (b) 1,1-Dimethylcyclopentanearrow_forwardSight along the C2-C1 bond of 2-methylpropane (isobutane).(a) Draw a Newman projection of the most stable conformation.(b) Draw a Newman projection of the least stable conformation.(c) Make a graph of energy versus angle of rotation around the C2-C1 bond.(d) Assign relative values to the maxima and minima in your graph, given that an H↔H eclipsing interaction costs 4.0 kJ/mol and an H↔CH3 eclipsing interaction costs 6.0 kJ/mol.arrow_forwardTake a look at the butane conformers below. Identify: (a)Which is an anti conformation in Newman? (b)Which is a Gauche conformation? (c)Which is the more stable Sawhorse conformer? (d)Which has the same potential energy/strain with ALS?arrow_forward
- H₂ H₂ (a) H₂C=C-C-C-CH3 1-pentene H (b) (c) (d) H3C-C-C-CH3 H CH3 2-butene cyclobutene 2-methyl-1,3-cyclohexadienearrow_forwardConsider 1-bromopropane, CH3CH2CH2Br. (a) Draw a Newman projection for the conformation in which CH3 and -Br are anti (dihedral angle 180°). (b) Draw Newman projections for the conformations in which - CH3 and -Br are gauche (dihedral angles 60° and 300°). (c) Which of these is the lowest energy conformation? (d) Which of these conformations, if any, are related by reflection?arrow_forwardAmong the figure, (a) what is the most stable conformation of n-pentane? (b) gauche conformation of butane and (c) least stable conformation of butanearrow_forward
- Identify whether the following pairs of structures are: (A) Same compound (B) Constitutional isomers (C) Cis-trans isomers (D) Not isomersarrow_forward(b) The reaction of cyclopropane with bromine is exothermic. (i) Complete the energy level diagram for this reaction by adding the product of the reaction, labelling the energy change, AH. cyclopropane + bromine energy KS VENarrow_forwardH C-Ć- C -CI Following is the structural formula of 1,2– dichloroethane. H H a) Draw Newman projections for all staggered and eclipsed conformations formed by rotation from 0° to 360° about the carbon- carbon single bond. b) Which staggered conformation(s) has the lowest energy; which has the highest energy? c) Which eclipsed conformation(s) has the lowest energy which has the highest energy?arrow_forward
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Chapter 4 Alkanes and Cycloalkanes Lesson 1; Author: Linda Hanson;https://www.youtube.com/watch?v=PPIa6EHJMJw;License: Standard Youtube License