Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Chapter 4, Problem 16PP
Practice Problem 4.16
(a) Write structural formulas for the two chair conformations of cis-1-isopropyl-4-methyl-cyclohexane.
(b) Are these two conformations equivalent?
(c) If not, which would be more stable?
(d) Which would be preferred conformation at equilibrium?
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(B) Draw two chair conformations of the following substituted cyclohexane and identify the
most stable conformation. Clearly show the axial and equatorial bonds.
Take 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?
Consider 1-bromopropane, Â 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?
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. 4LGP
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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
- (a) All Isomers have the same molecular formulae. Explain this further. Hint what does it mean to have the same molecular formulae? (b) What is Constitutional (structural) isomerism? Hint, isomers are different, so what is different between a pair of constitutional isomers (see the chart on the last page for examples). (c) What is Conformational isomerism?arrow_forwardThe skeletal line formula for a branched alkene is shown below. (i) What is the molecular formula of this compound? (ii) How many carbon atoms are in the longest chain, ignoring the double bond? (iii) What is the longest chain incorporating both carbons of the double bond? (iv) How many substituents are on this chain? (v) Give the IUPAC name for this compound. [6]arrow_forward2.34 Consider 1-bromopropane, CH3CH2CH2Br.(a) Draw a Newman projection for the conformation in which !CH3 and !Br are anti (dihedral angle 1808).(b) Draw Newman projections for the conformations in which !CH3 and !Br are gauche (dihedral angles 608 and 3008).(c) Which of these is the lowest energy conformation?(d) Which of these conformations, if any, are related by reflection?arrow_forward
- 2.35 Write a structural formula for each of the following compounds: (a) 6-Isopropyl-2,3-dimethylnonane (b) 4-tert-Butyl-3-methylheptane (c) 4-Isobutyl-1,1-dimethylcyclohexane (d) sec-Butylcycloheptane (e) Cyclobutylcyclopentanearrow_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_forwardExplain why each of the following alkenes is stable or unstable.(a) 1,2-dimethylcyclopentene (b) trans-1,2-dimethylcyclopentene(c) trans-3,4-dimethylcyclopentene (d) trans-1,2-dimethylcyclodecenearrow_forward
- Draw the alternative chair conformations for the cis and trans isomers of 1,2-dimethylcyclohexane, 1,3- dimethylcyclohexane, and 1,4-dimethylcyclohexane. (a ) Indicate by a label whether each methyl group is axial or equatorial. (b) For which isomer(s) are the alternative chair conformations of equal stability? (c) For which isomer(s) is one chair conformation more stable than the other?arrow_forward5.76 2,3-Dibromoprop-1-ene (C3H4Brâ‚‚) has four H atoms. Suppose that any of these H atoms can be replaced by a Cl atom to yield a molecule with the formula C3H3Brâ‚‚Cl. (a) Identify two H atoms where this substitution would yield constitutional isomers of C3H3Brâ‚‚Cl; (b) enantiomers of C3H3Brâ‚‚Cl; (c) diastereomers of C3H3Brâ‚‚Cl. co 11 HHH Juods H Brugtrio 2 bas A 2,3-Dil so ontemme A chon Br 2,3-Dibromoprop-1-enearrow_forwarddraw the most stable conformation of (a) ethylcyclohexane (b) 3-isopropyl-1,1-dimethylcyclohexanearrow_forward
- If either of the following molecules has a stereogenic carbon (chirality center), give structures for both of the enantiomers.             (a) 2-bromopropane                          (b) 2-bromobutanearrow_forwardThere 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.)arrow_forwardFor each alkene, indicate the direction of the dipole moment. For each pair, determine which compound has the largerdipole moment.(a) cis-1,2-difluoroethene or trans-1,2-difluoroethene(b) cis-1,2-dibromoethene or trans-2,3-dibromobut-2-enearrow_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