Problem 4.16 The torsional energy in propane is 14 kJ/mol (3.4 kcal/mol). Because each H,H eclipsing interaction is worth 4.0 kJ/mol (1.0 kcal/mol) of destabilization, how much is one H,CH3 eclipsing interaction worth in destabilization? (See Section 4.10 for an alternate way to arrive at this value.) Copyright © McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. Figure 4.7 Newman projections for Consider one C-C bond only. H CH3 the staggered and eclipsed conformations of propane H propane H • Arbitrarily pick one C to be in front and one C to be in back. • 3 H's on one C • 2 H's and 1 CH3 on the other C CH3 H. H H H H staggered conformation CH3 H Η H H H eclipsed conformation

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Problem 4.16
The torsional energy in propane is 14 kJ/mol (3.4 kcal/mol). Because each H,H eclipsing interaction is worth 4.0 kJ/mol
(1.0 kcal/mol) of destabilization, how much is one H,CH3 eclipsing interaction worth in destabilization? (See
Section 4.10 for an alternate way to arrive at this value.)
Copyright © McGraw-Hill Education. All rights reserved. No reproduction or
distribution without the prior written consent of McGraw-Hill Education.
Figure 4.7
Newman
projections for
Consider one C-C bond only.
H
CH3
the staggered
and eclipsed
conformations
of propane
H
propane
H
• Arbitrarily pick one C to be in
front and one C to be in back.
• 3 H's on one C
• 2 H's and 1 CH3 on the other C
CH3
H.
H
H
H
H
staggered conformation
CH3
H
Η
H
H
H
eclipsed conformation
Transcribed Image Text:Problem 4.16 The torsional energy in propane is 14 kJ/mol (3.4 kcal/mol). Because each H,H eclipsing interaction is worth 4.0 kJ/mol (1.0 kcal/mol) of destabilization, how much is one H,CH3 eclipsing interaction worth in destabilization? (See Section 4.10 for an alternate way to arrive at this value.) Copyright © McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. Figure 4.7 Newman projections for Consider one C-C bond only. H CH3 the staggered and eclipsed conformations of propane H propane H • Arbitrarily pick one C to be in front and one C to be in back. • 3 H's on one C • 2 H's and 1 CH3 on the other C CH3 H. H H H H staggered conformation CH3 H Η H H H eclipsed conformation
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