11. Using the templates provided below, draw the two different chair conformations for 1-isopropyl-3 dimethylcyclohexane where the methyl groups are trans to each other. One of the templates has bee numbered to help, it is recommended that you label the other template as well! Next, calculate the amount of strain in each molecule and write the answer beneath each structure. Lastly, circle the mc stable conformation. Use units of kJ/mol, the values you need are in table form in the notes module canvas. 2 OH OH

11. Using the templates provided below, draw the two different chair conformations for 1-isopropyl-3 dimethylcyclohexane where the methyl groups are trans to each other. One of the templates has bee numbered to help, it is recommended that you label the other template as well! Next, calculate the amount of strain in each molecule and write the answer beneath each structure. Lastly, circle the mc stable conformation. Use units of kJ/mol, the values you need are in table form in the notes module canvas. 2 OH OH

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter6: Alkanes & Alkenes

Section: Chapter Questions

Problem 4E: Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This...

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Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.
For each of the following disubstituted cyclohexanes, indicate whether the substituents in the two chair conformers will be both equatorial in one chair conformer and both axial in the other (A) or one equatorial and one axial in each of the chair conformers (B): Drag the appropriate items to their respective bins.
req Zreq 2req 2req 2req [Review Topics) [References] Cyclohexane derivatives exist primarily in the most stable of the available chair conformations. Give the position, axial or equatorial, of each of the three groups shown when the ring is in the most stable chair conformation. If a group divides its time equally between axial and equatorial positions, indicate this with ax/eq. The table of "Axial Strain Energies for Monosubstituted Cyclohexanes" found in the "Strain Energy Increments" section of the Reference tool is useful for answering this question. OH HC Group a is Group bis Group cis Submit Answer OH b Retry Entire Group 9 more group attempts remaining o O · 9020 0
Draw all four unique conformations (using Newman projections) for the molecule shown below, using the templates that have been provided. The arrow indicated the bond you will sight down in order to draw your Newman projections. Label these conformations as being either staggered or eclipsed. Also indicate which of these conformations is the most stable.
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?
Which of the following projections would the most stable? I believe that it would be the 6th because out of all 6 groups, the methyl groups are the furthest distance away from each other in the 6th. When they are in close proximity, the front and back methyl groups’ electron orbitals repel each other, which generates potential energy and makes the conformation unstable.
Name: Partner: Disubstituted rings Build a molecule of trans-1,4-dimethylcyclohexane and manipulate your model to determine the two possible chair conformations for the molecule. Draw the two structures below by completing the template that is provided and label the methyl substituents as being axial or equatorial Compute the energy differential between the two chairs by adding the A-values corresponding to the 1,3-diaxial interactions present in each molecule. Use this information to circle the more stable from of the molecule. Energy differential: lohexane and manipulate your model to determine the
Consider compound Q shown below (trimethylcyclohexane isomer). compound Q Which of the following is the most stable conformation of compound Q? I ||| CH3 Select one: O A. II OB. I O C. III O. D. IV H CH3 H CH3 H H- CH3 CH3 H CHS ||| H IV CH3 H CH₁ CH3 fff, H CH3 CH3 CH3
Consider (1R, 2S, 3S)-1-bromo-2- chloro-3-fluorocyclohexane, shown below. The most stable conformation of (1R, 2S, 3S)-1-bromo-2-chloro-3- fluorocyclohexane has... Bromine equatorial, chlorine A equatorial, fluorine equatorial Bromine axial, chlorine В equatorial, fluorine equatorial Bromine equatorial, chlorine C equatorial, fluorine axial Bromine axial, chlorine D equatorial, fluorine axial Bromine equatorial, chlorine E axial, fluorine equatorial
Draw as many resonance structures as you can for the following carbonation. Label all of the carbonation structures as 1,2,3 (primary,secondary,tertiary) and circle the most stable conformation in terms of the carbonation.
Which of the following two conformations of trans-3-methylcyclohexanol is more stable? Use the strain energy increments in the table below estimate the energy difference (a positive number) between them.
[Review Topics] [References] Calculate Strain energy for the conformer pictured below, using strain energy increments from the table. Strain Energy for Alkanes Interaction / Compound kJ/mol H: H eclipsing H: CH3 eclipsing CH3 CH3 eclipsing gauche butane cyclopropane cyclobutane cyclopentane cycloheptane cyclooctane H₂ H (Calculate your answer to the nearest 0.1 energy unit, and be sure to specify units, kJ/mol or kcal/mol. The answer is case sensitive.) CH3 CH3 H 4.0 5.8 11.0 3.8 115 110 26.0 26.2 40.5 H kcal/mol 1.0 1.4 2.6 0.9 27.5 26.3 6.2 6.3 9.7 Previous Next