E2 Reactions and Stability Concepts

The video tutorial covers the E2 reaction mechanism, explaining its one-step process and lack of carbocation rearrangements. It discusses the reaction rate's dependence on substrate and base concentrations, and the formation of major and minor products based on alkene stability. Examples using different bases, such as sodium ethoxide and terpetoxide, illustrate the impact of steric hindrance and leaving group quality on product preference. The tutorial also compares the stability of conjugated and isolated dienes, emphasizing the role of resonance.

What is the order of the E2 reaction with respect to the substrate and base?

• First order with respect to base only

• First order with respect to substrate only

• Second order with respect to both

• First order with respect to both

Which product is more stable in an E2 reaction, Zaitsev or Hofmann?

• Hofmann product

• Zaitsev product

• Both are equally stable

• Neither is stable

Why do bulky bases prefer to form Hofmann products?

• They are less reactive

• Due to electronic effects

• They are more reactive

• Due to steric hindrance

What is the major product when using a bulky base like terpetoxide?

• Hofmann product

• Zaitsev product

• No reaction occurs

• Both products equally

Why do alkyl fluorides tend to form Hofmann products?

• Fluorine is a good leaving group

• Fluorine stabilizes the transition state

• Fluorine destabilizes the transition state

• Fluorine is a poor leaving group

Which leaving group quality favors the formation of Zaitsev products?

• No leaving group

• Poor leaving group

• Good leaving group

• Neutral leaving group

What is the effect of a good leaving group on the transition state?

• No effect on transition state

• Resembles a carbocation

• Resembles an alkene

• Resembles a carbanion

Which type of carbanion is more stable?

• Secondary carbanion

• All are equally stable

• Tertiary carbanion

• Primary carbanion

What type of diene is more stable due to resonance?

• No diene is stable

• Cumulative diene

• Conjugated diene

• Isolated diene

In a reaction with an existing double bond, which hydrogen is more likely to be abstracted?

• The one leading to an isolated diene

• The one leading to a conjugated diene

• The one leading to a cumulative diene

• The one leading to no diene