ORGANIC CHEMISTRY-MOLYMOD PACKAGE
5th Edition
ISBN: 9781260227307
Author: SMITH
Publisher: MCG
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Textbook Question
Chapter 4, Problem 4.48P
(a) Using Newman projections, draw all staggered and eclipsed conformations that
result from rotation around the bond highlighted in red in each molecule; (b) draw a graph of energy versus dihedral angle for rotation around this bond.
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(a) Using Newman projections, draw all staggered and eclipsedconformations that result from rotation around the bond highlighted in red in each molecule; (b) draw a graph of energy versus dihedral angle for rotation around this bond.
HO₂
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COOH
COOH
V
POH
HOT
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VI
Ho
HO
COOH
COOH
VI
H
H
COOH
COOH
VIIL
OH
OH
Question: In the structures / examples abovke Identify V, VI, VII and
VIII as Identical enantiomers, ciastereomes, stereo/cumers and/or
structural isomers (there are 6 pairs 7 Comp eand to discover
te I&T I TEN TEM TIMIN).
4. (a) Draw a skeletal (line-bond) structure for 3,4-dimethylhexane.
(b) Draw a sawhorse representation of any staggered conformation of this molecule looking down the
carbon-3 to carbon-4 bond.
(c) Draw a Newman projection looking down the carbon-3 to carbon-4 bond of the same conformation
that you drew as a sawhorse representation.
Chapter 4 Solutions
ORGANIC CHEMISTRY-MOLYMOD PACKAGE
Ch. 4 - Prob. 4.1PCh. 4 - Problem 4.2 Which of the following is not another...Ch. 4 - Problem 4.3 Draw the five constitutional isomers...Ch. 4 - Prob. 4.4PCh. 4 - Prob. 4.5PCh. 4 - Draw the five constitutional isomers that have...Ch. 4 - Problem 4.7 Give the IUPAC name for each...Ch. 4 - Give the IUPAC name for each compound. a....Ch. 4 - Problem 4.9 Give the structure corresponding to...Ch. 4 - Prob. 4.10P
Ch. 4 - Give the IUPAC name for each compound.Ch. 4 - Give the structure corresponding to each IUPAC...Ch. 4 - Arrange the following compounds in order of...Ch. 4 - Problem 4.14 Draw the staggered and eclipsed...Ch. 4 - Prob. 4.15PCh. 4 - Prob. 4.16PCh. 4 - Problem 4.17 a. Draw the three staggered and...Ch. 4 - Problem 4.18 Rank the following conformations in...Ch. 4 - Problem 4.19 Consider rotation around the...Ch. 4 - Calculate the destabilization present in each...Ch. 4 - Problem 4.21 Classify the ring carbons as up or...Ch. 4 - Problem 4.22 Using the cyclohexane with the C’s...Ch. 4 - Draw a second chair conformation for each...Ch. 4 - Problem 4.24 Draw both conformations for and...Ch. 4 - Problem 4.25 Draw the structure for each compound...Ch. 4 - For cis-1, 3-diethylcyclobutane, draw a a...Ch. 4 - Prob. 4.27PCh. 4 - Problem 4.28 Consider .
Draw structures f or the...Ch. 4 - Problem 4.29 Draw a chair conformation of...Ch. 4 - Prob. 4.30PCh. 4 - Draw the products of each combustion reaction.Ch. 4 - Explain why beeswax is insoluble in H2O, slightly...Ch. 4 - Prob. 4.33PCh. 4 - Name each alkane using the ball-and-stick model,...Ch. 4 - Consider the substituted cyclohexane shown in the...Ch. 4 - Prob. 4.36PCh. 4 - Prob. 4.37PCh. 4 - 4.38 Give the IUPAC name for each compound.
a. c....Ch. 4 - 4.39 Give the structure and IUPAC name for each of...Ch. 4 -
4.40 Draw the structure corresponding to each...Ch. 4 - Prob. 4.41PCh. 4 - 4.42 Give the IUPAC name for each compound.
a....Ch. 4 - Prob. 4.43PCh. 4 - Prob. 4.44PCh. 4 - 4.45 Which conformation in each pair is higher in...Ch. 4 - 4.46 Considering rotation around the bond...Ch. 4 - Prob. 4.47PCh. 4 - 4.48 (a) Using Newman projections, draw all...Ch. 4 - 4.49 Label the sites of torsional and steric...Ch. 4 - 4.50 Calculate the barrier to rotation for each...Ch. 4 - 4.51 The eclipsed conformation of is less...Ch. 4 - (a) Draw the anti and gauche conformations for...Ch. 4 - For each compound drawn below: a.Label each OH,Br...Ch. 4 - Draw the two possible chair conformations for...Ch. 4 - For each compound drawn below: a. Draw...Ch. 4 - 4.56 Convert each of the following structures into...Ch. 4 - Prob. 4.57PCh. 4 - Prob. 4.58PCh. 4 - 4.59 Classify each pair of compounds as...Ch. 4 - Classify each pair of compounds as constitutional...Ch. 4 - Prob. 4.61PCh. 4 - 4.62 Draw the three constitutional isomers having...Ch. 4 - Prob. 4.63PCh. 4 - 4.64 Draw the products of combustion of each...Ch. 4 - 4.65 Hydrocarbons like benzene are metabolized in...Ch. 4 - Prob. 4.66PCh. 4 - Prob. 4.67PCh. 4 - Cyclopropane and cyclobutane have similar strain...Ch. 4 - Prob. 4.69PCh. 4 - Haloethanes (CH3CH2X,X=Cl,Br,I) have similar...Ch. 4 - Prob. 4.71PCh. 4 - Prob. 4.72PCh. 4 - Consider the tricyclic structure B (a) Label each...Ch. 4 - Read Appendix B on naming branched alkyl...Ch. 4 - Read Appendix B on naming bicyclic compounds. Then...
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- QUESTION 3 (a) Draw the two conformations of ethane which has an energy minimum and energy maximum using the Newman projection. Explain why one conformation is lower in energy than the other.arrow_forwardQ2. Answer any TWO of the following parts: (a) Draw the two main conformations that exist for cyclohexane. Explain clearly why one conformer is more stable than the other. Using cis-1-ethyl-3-methylcyclohexane, as an example, explain how ring flipping occurs. Draw both conformers of cis-1-ethyl-3-methylcyclohexane and explain clearly which one predominates. (b) What is polarimetry? The specific rotation of (R)-carvone is - 61°. A chemist prepared a 750 mg mixture of (R)-carvone and its enantiomer in 10 ml of ethanol and placed the solution in a 10 cm polarimeter cell. The observed rotation was - 4.125°. Calculate the specific rotation for the above mixture. What is meant by enantiomeric excess? Then determine the % enantiomeric excess (% ee) in the mixture. (i) (ii) (iii) What % of the mixture is (R)-carvone and (S)-carvone?arrow_forward3)) Draw the most stable chair conformation of a 1,2,4-trimethylcyclohexane (Show all the hydrogens and indicate if the bond is axial or equatorial at the substitution).arrow_forward
- Helparrow_forward1. Draw 5 constitutional isomers of compounds with molecular formula CaHsO2 using expanded or condensed structure. (a)arrow_forwardDraw the Newman projection so that it corresponds to the molecule and conformation shown when viewed down the red bond in the direction of the arrow.arrow_forward
- Draw the most and least stable conformer of chloroethane and 1,2-dibromoethane.arrow_forwardConsider the tricyclic structure B. (a) Label each substituent on the rings as axial or equatorial. (b) Draw B using chair conformations for each sixmembered ring. (c) Label the atoms on the ring fusions (the carbons that join each set of two rings together) as cis or trans to each other.arrow_forwardFor the following two pairs of molecules, (1) Draw out the chair conformation for each molecule, flip the ring if it is possible. (2) Compare both molecules to circle out which one is more stable. (3) Identify their relationship as: constitutional isomer, conformational isomer, stereoisomer or identical. (4) Find all the chiral center on each molecule and label them. VS. ****arrow_forward
- Look at the model of chloroethane. a) Do all chloroethane molecules spend all of their time in this preferred conformation? Explain why or why not. b) What is the preferred conformation called?arrow_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_forwardFor the molecule shown below, draw both chair conformations and circle which is the lower energy conformer. .CI "CIarrow_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
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