i need help Following are the alternative chair conformations for trans-1-bromo-2-methylcyclohexane:BrBrCH3ČH3АВUsing the data for AG for monosubstituted cyclohexanes at room temperature (25°C) and the representative value* for the gauche interaction of twoequatorially positioned substituents in the 1,2-position:axial → equatorialAG° (kJ/mol) | GroupNH2GroupAG° (kJ/mol)C=N-0.8-5.9Br-2.4CH3-7.3ОН-3.91,2-gauche3.8a) Calculate the difference in the Gibbs free energy between the second and first conformation including the algebraic sign.kJ/molb) Given your value in (a), calculate the percent of the chair, indicated as B, presented in an equilibrium mixture of the conformers at 25°C.%*The actual value will depend on the substituents.The values of the gas constant and the temperature for 25°C are 8.314 JK-'mol- and 298 K respectively.

Answered: Image /qna-images/answer/f5687fca-683e-4e47-9657-002a7c52e322.jpg

a) Calculate the difference in the Gibbs free energy between the second and first conformation including the algebraic sign. kJ/mol b) Given your value in (a), calculate the percent of the chair, indicated as B, presented in an equilibrium mixture of the conformers at 25°C. %-

a) Calculate the difference in the Gibbs free energy between the second and first conformation including the algebraic sign. kJ/mol b) Given your value in (a), calculate the percent of the chair, indicated as B, presented in an equilibrium mixture of the conformers at 25°C. %-

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter4: Organic Compounds: Cycloalkanes And Their Stereochemistry

Section4.SE: Something Extra

Problem 24VC: A trisubstituted cyclohexane with three substituents-red, green, and blue-undergoes a ring-flip to...

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Question

i need help

Following are the alternative chair conformations for trans-1-bromo-2-methylcyclohexane:
Br
Br
CH3
ČH3
А
В
Using the data for AG for monosubstituted cyclohexanes at room temperature (25°C) and the representative value* for the gauche interaction of two
equatorially positioned substituents in the 1,2-position:
axial → equatorial
AG° (kJ/mol) | Group
NH2
Group
AG° (kJ/mol)
C=N
-0.8
-5.9
Br
-2.4
CH3
-7.3
ОН
-3.9
1,2-gauche
3.8
a) Calculate the difference in the Gibbs free energy between the second and first conformation including the algebraic sign.
kJ/mol
b) Given your value in (a), calculate the percent of the chair, indicated as B, presented in an equilibrium mixture of the conformers at 25°C.
%
*The actual value will depend on the substituents.
The values of the gas constant and the temperature for 25°C are 8.314 JK-'mol- and 298 K respectively.

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