a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions (axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, first calculate Keg and then use this value to find the percentage.) CH3 H3C OH Answers: a. The energy difference is b. In the more stable chair: kJ/mol. v position. • The isopropyl group is in the| • The carboxyl group is in the position. c. At 25°C the equilibrium percent of the more stable chair conformation is approximately

a. Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. b. Specify substituent positions (axial or equatorial) in the more stable chair. c. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, first calculate Keg and then use this value to find the percentage.) CH3 H3C OH Answers: a. The energy difference is b. In the more stable chair: kJ/mol. v position. • The isopropyl group is in the| • The carboxyl group is in the position. c. At 25°C the equilibrium percent of the more stable chair conformation is approximately

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter7: Cycloalkanes

Section: Chapter Questions

Problem 17E: Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of...

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Use flat representation of rings, not chair in the drawing. Determine the most and least stable. Consider the most stable chair for each of these isomers, and then draw the most stable and least stable isomer based on a comparison of the best chair for each one.
Observe the Newman projection of the next molecule along the bond shown in red with the front carbon the one bonded to "Cl". a) Draw one of the Newman projections of the molecule with a staggered conformation. b) Draw one of the Newman projections of the molecule with an eclipsed conformation.
Imagine that this worksheet has sucked you the plane of the page, and you are now facing the indicated bond of the drawn molecule. a. Draw the six main Newman projections for the indicated bond: three eclipsed, three staggered. b. Label which conformers are eclipsed ands taggered.c. Identify the most and least stable conformer, and explain your reasoning.
Use strain energy increments in the OWL Table Reference (see References button, Strain Energy Increments) to calculate the energy difference between the two chair conformations of the compound below. Specify substituent positions (axial or equatorial) in the more stable chair. Estimate the percent of the more stable chair at equilibrium at 25°C. (To determine the percent of the more stable chair at equilibrium, first calculate Keq, and then use this value to find the percentage.)
Do not give handwriting solution. Click on the two groups that are in contact with one another and destabilize this conformation by steric strain. It helps to build a model of the molecule. Thankyou!
Label the sites of torsional and steric strain in each conformation.
starting from the wedge and dash structure below, rotate the back carbon to provide the newman projection in the least stable conformation
Between the cis and trans configuration of 1-chloro-4-methylcyclohexane, which is the most stable stereoisomer and configuration? To prove your argument, draw a model or use a modeling software to model cis- and trans-1-chloro-4-methylcyclohexane (show all the hydrogens and ensure proper chair conformation) and use arrows to show where steric strain occurs.
Please do parts A and B Consider (2R,3R)-2,3-diidobutane: (a) Draw a Fischer Projection of this structure with C1 on top and C4 on bottom. (b) Draw a Newman Projection of of the meso compound of 2,3-dibromobutane looking down the C2-C3 bond with C2 in front, and label your asymmetric carbons as S or R.
Are my chair conformations correct? What about the energies of each conformation according to the table?
Rank these conformational isomers in order of decreasing potential energy. Rank from hightest to lowest potential energy. To rank items as equivalent, overlap them.
Starting from the Newman projection below, rotate the back carbon to provide the structure in a gauge staggered conformation.