Conformational Isomers
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Conformational Isomers
3 problems
1PRACTICE PROBLEM
Observe the molecular orbital picture of ethyne. In contrast to ethane, there is no free rotation around the triple bond of ethyne. Explain.
2PRACTICE PROBLEM
(i) Excluding the C3−C4 bond of 2,5-dimethylhexane, about which other C−C bonds can rotation take place?
(ii) Determine the number of the C−C bonds in 2,5-dimethylhexane that have equally stable staggered conformers.
3PRACTICE PROBLEM
Even though free rotation is generally observed around most σ bonds, the C–N bond in an amide demonstrates restricted rotation, as depicted below. Which of the following factors primarily accounts for this behavior?
