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6. Usually cyclohexane A values are reported as AG values, but for some substituents, AH and AS values are also available. Such values are shown below for methyl and isopropyl (equatorial to axial interconversion). Consider the two chair con- formers of cis-1-methyl-4-isopropylcyclohexane. Calculate the percentage of each form present at (a) 300 K, (b) 100 K, and (c) 75 K.

6. Usually cyclohexane A values are reported as AG values, but for some substituents, AH and AS values are also available. Such values are shown below for methyl and isopropyl (equatorial to axial interconversion). Consider the two chair con- formers of cis-1-methyl-4-isopropylcyclohexane. Calculate the percentage of each form present at (a) 300 K, (b) 100 K, and (c) 75 K.

Chemistry
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
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16. Usually cyclohexane A values are reported as AG values, but for some substituents, AH and AS values are also available. Such values are shown below for methyl and isopropyl (equatorial to axial interconversion). Consider the two chair con- cis-1-methyl-4-isopropylcyclohexane. Calculate the percentage of each form present at (a) 300 K, (b) 100 K, and formers of (c) 75 K. CH3 CH(CH3)2 AH (kcal/mol) 1.75 1.52 AS (cal/mol K) 0 -2.31
Transcribed Image Text:16. Usually cyclohexane A values are reported as AG values, but for some substituents, AH and AS values are also available. Such values are shown below for methyl and isopropyl (equatorial to axial interconversion). Consider the two chair con- cis-1-methyl-4-isopropylcyclohexane. Calculate the percentage of each form present at (a) 300 K, (b) 100 K, and formers of (c) 75 K. CH3 CH(CH3)2 AH (kcal/mol) 1.75 1.52 AS (cal/mol K) 0 -2.31
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