Organic Chemistry
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Briefly explain why ring opening takes place in opposite directions in the reactions shown below.
Consider the organohalides A and B, where C―I bonds can undergo bond cleavage to form a carbocation and an iodide anion. Predict which organohalide (A or B) would undergo this process at a faster rate. Provide an explanation for your answer.
In which of the following pairs of species is the first one more stable than the second one?
Which among the following carbocation species is the most stable?
Will reaction 1 occur faster than reaction 2? (Note: Because of hyperconjugation, the more substituted carbocations are more stable.)
(a) Arrange the following carbocations in decreasing order of stability.
(b) Determine which carbocation would have the highest rate of formation.
(c) Which carbocation is expected to undergo the fastest reaction with the bromide ion (Br–)?
Most compounds containing the benzyl group produce a peak at m/z 91 corresponding to the tropylium ion.
Explain why tropylium cation is very stable.
Explain why a tertiary butyl cation is more stable than an isopropyl cation.
Which of the following carbocation species is the most stable?
Sort the following species in decreasing order of stability.
Arrange the following species in decreasing order of stability:
Based on resonance stabilization, identify which of the carbocations below is more stable.
Arrange the following carbocations from the most stable to the least stable.
Determine which of the following carbocations is more stable.
Rank the following reactive intermediates in order of decreasing reactivity.
Rank the following reactive intermediates in order of increasing reactivity:
Arrange the carbocations in increasing order of stability.
Choose the less stable carbocation between the two carbocations.
Select the less stable carbocation between the two carbocations.
Which is the most stable carbocation?
