For the 1,2-dichlorocyclohexane stereoisomers, which conformation of the trans stereoisomer has the lower energy, the diaxial or the diequatorial conformer? Which isomer and conformation of the three you built has the lowest energy? E of all the isomers of 1,2-dichlorocyclohexane. Explain the differences in energy, i.e., identify the sources of strain in the conformations you built. Show the sources of strain in a drawing.

For the 1,2-dichlorocyclohexane stereoisomers, which conformation of the trans stereoisomer has the lower energy, the diaxial or the diequatorial conformer? Which isomer and conformation of the three you built has the lowest energy? E of all the isomers of 1,2-dichlorocyclohexane. Explain the differences in energy, i.e., identify the sources of strain in the conformations you built. Show the sources of strain in a drawing.

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter12: Chirality

Section: Chapter Questions

Problem 20E

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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?
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.
Consider the derivative of cyclohexane A and its representation in chair conformation B: 7 3 H3C $1 Ń 4 9 1 2 Complete Structure B: 3 4 5 6 7 8 9 HO 10 AT Choose... H OH electron lone pair CH3 CH2OH Choose... Choose... Choose... Choose... F Choose... OH ◆ + ♦ ◆ H 10 B 6 5
Given the compounds below, which is the more stable one based on their chair conformation?
[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
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.
, draw its and then in the 2. For (1R, 2S, 4R)-4-tert-buyl-1-ethyl-2-methylcyclohexane: draw its correct skeletal structure most stable conformer first showing the Hydrogens that are directly attached to the ring last stusture omit the hydrogens that are directly connected to the ring and draw the correct positions of the three alkyl groups in skeletal representation. Draw all bonds with the same length! 5. draw the correct skeletal structure here showing stereochemistry on this chair draw the most stable conformer including the H's directly attached to the ring on this chair draw only the alkyl groups, all bonds same lenght
to Medical Chemistry II. (BMC1CHEM02) oard / My courses / Introduction to Medical Chemistry II. (BMCICHEM02) / 29/03 2021 Chemistry Electronic te Electronic test in Chemistry n3 Cyclobutane is more stable molecule than cyclopropane, because.... Select one: ut of it has less angle strain. cyclobutane has a cis-trans stereoisomers. cyclobutane is a larger ring. it has more torsional strain. cyclopropane is planar. Next page
a) i) Draw the Newman projections for the conformations of ethane (staggered and eclipsed) Which is higher in energy? Which is more stable? Next to each conformer, draw the equivalent ‘sideways’ view, using wedged bonds
Which is the most stable stereoisomer and configuration of 1-chloro-4-methylcyclohexane between the cis and trans configurations? Please explain. Provide chair structures + show all H for cis- and trans-1-chloro-4-methylcyclohexane, and use arrows to show where steric strain occurs.
is this (Z) or (E) conformation, and how do you know?
In each case below, identify the higest and lowest energy conformations. In cases where two or three conformations are degenerate, choose only one as your anwser. Use Me, H, and Et when drawing the structures.