Quiz - Alkyl Halides - Eliminations | Alkyl Halides - Elimination Reactions

Organic Chemistry 1 - Quiz - Alkyl Halides - Eliminations

1

Which statement is correct about a SN1 reaction?

SN1 reactions are​​​​​​​ nucleophilic substitutions which proceed through an intermediate carbocation ⇒ SN1 reactions are unimolecular with a bond-breaking step following by a bond-making step. The bond-breaking step is slower and therefore determines the rate: it is the rate-determining step

2

Which of the following statements regarding the E2 mechanism is incorrect?

E2 reactions are nucleophilic eliminations which do not proceed via an intermediate ⇒ E2 reactions are bimolecular with simultaneous bond-making and bond-breaking steps. E2 reactions always occur with an anti periplanar geometry (preferred over syn periplanar geometry)

3

Which statement is incorrect about an E1 reaction between (CH3)3CBr and NaOH?

Due to planar carbocation, E1 reactions do not always occur with an anti periplanar geometry
SN1 and E1 reactions always compete

4

Which of the following starting materials most likely reacts via an E1 mechanism?

The more stable the carbocation intermediate, the faster the E1 reaction. A tertiary carbocation is more stable than a secondary or a primary (hyperconjugation) ⇒ (CH3)3CBr will react via an E1 mechanism

5

What is the major product of an elimination reaction between 3-chloro-2,3-dimethylpentane and NaOH?

In elimination reactions, the major product is the most substituted alkene. This is the Zaitsev's rule

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6

Which conditions favor an E1 reaction?