Question 5 of 20 The general values for steric and torsional strain are provided. Use these values to calculate the barrier to rotation for 2-methylpentane looking down the C2-C3 bond. Assume that methyl/ethyl steric interactions are the same as methyl/methyl. H H. CH/CH3 gauche CH3 CH3 3.8 kJ/mol steric strain HH H/H eclipsed bond 4 kJ/mol torsional strain H H. HH CH/H eclipsed bond 5.6 kJ/mol torsional strain H CH3 H3C CH3 CH/CH3 eclipsed 11 kJ/mol torsional & steric strain

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Question 5 of 20
The general values for steric and torsional strain are provided. Use
these values to calculate the barrier to rotation for 2-methylpentane
looking down the C2-C3 bond. Assume that methyl/ethyl steric
interactions are the same as methyl/methyl.
H
H.
CH/CH3 gauche
CH3
CH3
3.8 kJ/mol steric strain
HH
H/H eclipsed bond
4 kJ/mol torsional strain
H.
HH
CH/H eclipsed bond
5.6 kJ/mol torsional strain
CH3
H.
H3C CH3
CH/CH3 eclipsed
11 kJ/mol torsional & steric strain
Transcribed Image Text:Question 5 of 20 The general values for steric and torsional strain are provided. Use these values to calculate the barrier to rotation for 2-methylpentane looking down the C2-C3 bond. Assume that methyl/ethyl steric interactions are the same as methyl/methyl. H H. CH/CH3 gauche CH3 CH3 3.8 kJ/mol steric strain HH H/H eclipsed bond 4 kJ/mol torsional strain H. HH CH/H eclipsed bond 5.6 kJ/mol torsional strain CH3 H. H3C CH3 CH/CH3 eclipsed 11 kJ/mol torsional & steric strain
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