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(a) Draw the three staggered conformations of 2-methyl-3-methylpentane looking down the C2-C3 bond (label the conformations A, B, and C). (b) Given that the CH3'CH; gauche interaction is 0.9 kcal·mole', and the CH3 CH2CH; gauche interaction is 1.1 kcal·mole', determine the energies of the three conformations A-C. Which is the most stable? Which is the least stable?

(a) Draw the three staggered conformations of 2-methyl-3-methylpentane looking down the C2-C3 bond (label the conformations A, B, and C). (b) Given that the CH3'CH; gauche interaction is 0.9 kcal·mole', and the CH3 CH2CH; gauche interaction is 1.1 kcal·mole', determine the energies of the three conformations A-C. Which is the most stable? Which is the least stable?

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
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Please do parts a and B

9. (a) Draw the three staggered conformations of 2-methyl-3-methylpentane looking down the C2-C3 bond (label the conformations A, B, and C). (b) Given that the CH3 CH3 gauche interaction is 0.9 kcal·mole", and the CH3 CH2CH; gauche interaction is 1.1 kcal·mole, determine the energies of the three conformations A-C. Which is the most stable? Which is the least stable?
Transcribed Image Text:9. (a) Draw the three staggered conformations of 2-methyl-3-methylpentane looking down the C2-C3 bond (label the conformations A, B, and C). (b) Given that the CH3 CH3 gauche interaction is 0.9 kcal·mole", and the CH3 CH2CH; gauche interaction is 1.1 kcal·mole, determine the energies of the three conformations A-C. Which is the most stable? Which is the least stable?
Expert Solution
Step 1

The structure of 2 methyl-3-methylpentane is 

 CH3-CH(CH3)-CH(CH3)-CH2-CH3 

All the three possible staggered conformation with their gauche interaction energies for this molecule is given in a attached image.

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