153. Carbocation/Leaving Group Stability(a) Circle the more stable carbocationCH3IH₂C-NH3CCH3++(b) Circle the more stable leaving groupOCH3ooCH34. Chair Strain (^(a):3) Complete the table, indicating how many of each type of interaction is presentin total for the chair conformer shown below.(b)OHBrCH3CH3gauche interactions between gauche interactions 1,3-diaxial interactionssubstituents and the ringbetween substituents between substituentsC) From the options below, circle the conformer that results from a chair flip of theconformer shown in (a).CH3BrBr.BrCH3.OHCH3HO-BrCH3ПонснаOH|HOH3CCH3CH3CH3

Answered: Image /qna-images/answer/879f800c-1fb2-4e6b-be33-1f4bfe88ff39.jpg

Answered: 15 3. Carbocation/Leaving Group…

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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1E.) Which of the following two conformers is lower in energy? Both conformers are of equal enery O A Conformer A is lower in energy. B Conformer B is lower in energy. It cannot be determined
Consider 1-bromopropane, CH3CH2CH2Br. (a) Draw a Newman projection for the conformation in which CH3 and -Br are anti (dihedral angle 180°). (b) Draw Newman projections for the conformations in which - CH3 and -Br are gauche (dihedral angles 60° and 300°). (c) Which of these is the lowest energy conformation? (d) Which of these conformations, if any, are related by reflection?
Bhumi
(v) Identify every chiral center in cholesterol (below) with an asterisk. HO (vi) Draw an energy vs. dihedral angle diagram that represents all the conformations of butane starting from the anti-conformation. (vii) Draw both chair conformations for the compound shown below using the templates provided. Circle the chair conformation that is lowest in energy. Br (viii) Draw a chair conformation that meets the following criteria. Axial chlorine at C5 Equatorial methyl at C4 Bromine on C2 that is cis to the chlorine 6 2 5 3 4
5) Draw the chair conformer described in (a), adding only the substituents (not the hydrogen groups of those stereocenters) onto the template below. a) Br CH3 Ph Complete the table, indicating how many of each type of interaction is present in total for the chair conformer described in (a). gauche interactions between gauche interactions substituents and the ring 1,3-diaxial between substituents interactions between substituents Draw the other conformer that results from a chair flip onto the template below. Make he changes that happen in the chair flip, but don't make other changes. Only draw substituents.
,CH3 CH2Br Br 6. For the compound projections for the following angles of rotation of C2 relative to C3: 0, 60, 120, 180, 240, 300, and 360 degrees. (b) Label each conformation as to whether it is eclipsed (e) or staggered (s). (a) site down the C2 – C3 bond axis, and draw the seven Newman
Image attached
For every structure below, draw the most stable chair conformation. Where two or more conformations are equally stable, draw both.
(5) Draw the most stable chair conformation of the cyclohexane shown below. CH3 CI H3C Br OH CH3
1. Chair Strain (a) Consider (1R,2S,3S,4S)-1,4-dibromo-2-(tert-butyl)-3-methylcyclohexane. Circle the location (axial or equatorial) for each substituent in this molecule's most stable chair conformer. (b) (၁) Br 1-Br axial equatorial *Bu tBu axial equatorial "CH3 CH 3 axial equatorial Br 4-Br axial equatorial Draw the most stable chair conformer, adding only the substituents (not the hydrogen groups of those stereocenters) onto the chair below. Complete the table below, indicating how many of each type of interaction is present in total for the most stable chair conformer as described in (a). gauche interactions between gauche interactions 1,3-diaxial interactions substituents and the ring between substituents between substituents
Draw all three staggered conformations for the following compound, viewed along the C₂-C3 bond. Determine which conformation is the most stable, taking into account gauche interactions and hydrogen-bonding interactions. (J. Phys. Chem. A 2001, 105, 6991-6997) Provide a reason for your choice by identifying all of the interactions that led to your decision. H₂C OH C₂ HO CH3 Which of the following is the most stable staggered conformer? Me Me *** Conformer B Me- Me Conformer A Me Conformer C Me Conformer B because the anti OH groups avoid hydrogen bonding, which is a destabilizing effect. Conformer A because there are only two gauche interactions, and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer C because there is no steric strain for Me-OH gauche interactions and hydrogen bonding between the two OH groups is a stabilizing effect. Conformer B because the large OH groups are anti to each other.
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