Draw the two chair conformations of the compound pictured below conformer be graded incorrect). Include the hydrogen atoms on the cyclohexane ring where the branches are located. circle the more stable Axial and equatorial positioning of substituents must be clear (vague positioning will CH3 H3C- CI

Draw the two chair conformations of the compound pictured below conformer be graded incorrect). Include the hydrogen atoms on the cyclohexane ring where the branches are located. circle the more stable Axial and equatorial positioning of substituents must be clear (vague positioning will CH3 H3C- CI

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Q2. 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?
Draw a skeletal (line-bond) structure of cis-1,3-dimethylcyclohexane. Use a dash or wedge bond to indicate the relative relationship of substituents, where applicable. Select to Draw
Draw all the conformations of n-Butane using Newman projections and name all the conformations
Draw the two chair forms for the following: Circle the preferred conformer. Give the IUPAC name for this molecule!
Question 12 of 22 > O Macmillan Learning Given the planar trisubstituted cyclohexane, fill in the missing substituents (with H or Cl) to complete the two possible cyclohexane chair conformations. Then, determine the more stable conformer. You might find it helpful to make a model of the cyclohexane to help visualize the chair conformations. CI H F □ H H H chair flip *4 = $x H H H H H H Answer Bank H H Br Chair 1 Br H F Cl Chair 2
Draw the Newman projection of the anti and syn conformers for the following molecule by rotating the C-2 and C-3 bond.
Draw the most stable Newman projection for the following alkanes looking down the C-C bond pointed to by the arrows.
• Question 3: a) Draw the three staggered and three eclipsed conformations that result from rotation around the designated bond using Newman projections. b) Label the most stable and least stable conformation. rotation here H CH3 C CH₂CH3 CH3
Illustrate a Newmann projection for the most stable conformation of the following molecule looking down the C3-C4 bond
QUESTION 22 Choose the Newman projection that shows the most stable conformation with respect to the bond marked with the arrow. CH3 CH3 H. H H2C CH2 H3C `H H3CH2CH2C CH3 ČH2CH2CH3 ČH2 ČH3 3 HCH3 HCH3 CH3 H. -CH2CH2CH3 CH3 -CH3 CH2CH2CH3 H3C CH2CH2CH3 5 Structure 1 Structure 2 Structure 3 Structure 4 C Structure 5 Structure 6 O O O O O O