Page 14 Flashcards
What are the two mechanisms of elimination reactions?
A: The two mechanisms are E2 (bimolecular elimination) and E1 (unimolecular elimination).
How are elimination mechanisms (E2 and E1) similar to substitution mechanisms?
A: E2 corresponds to S_N2 (both are bimolecular), and E1 corresponds to S_N1 (both are unimolecular).
What is the key difference between E2 and E1 mechanisms?
A: The timing of bond cleavage and bond formation differs; E2 occurs in a single step, while E1 involves a two-step process.
What is the key difference between E2 and E1 mechanisms?
A: The timing of bond cleavage and bond formation differs; E2 occurs in a single step, while E1 involves a two-step process.
What does “bimolecular” mean in the context of E2 elimination?
A: Bimolecular means that the reaction rate depends on the concentration of both the substrate and the base.
What does “unimolecular” mean in the context of E1 elimination?
A: Unimolecular means that the reaction rate depends only on the concentration of the substrate.
How do E2 and S_N2 reactions compare in terms of mechanism?
A: Both E2 and S_N2 reactions occur in a single concerted step and involve bimolecular kinetics.
How do E2 and S_N2 reactions compare in terms of mechanism?
A: Both E2 and S_N2 reactions occur in a single concerted step and involve bimolecular kinetics.
Which elimination mechanism, E2 or E1, is more dependent on the strength of the base?
A: E2 is more dependent on the strength of the base because the base participates directly in the rate-determining step.
Which elimination mechanism involves a carbocation intermediate?
A: The E1 mechanism involves a carbocation intermediate.
What is the key similarity between E2 and S_N2 , as well as E1 and S_N1 ?
A: E2 and S_N2 share features like bimolecular kinetics and a single-step mechanism, while E1 and S_N1 share features like a carbocation intermediate and a two-step mechanism.
