CH320M - Sp2024 Midterm 3 Review

Which of the following statements regarding electrophillic addition reactions of alkenes is true?

• Oxonium ion intermediates have a negatively charged oxygen.

• Alkyl groups are electron donating groups that destabilize carbocations

• In the reaction of Cl₂ with an alkene, the stereochemistry of the alkene dictates the stereochemistry of the vicinal dihalide formed.

Which of the following halohydrins can be formed in high yield fom an alkene?

• 
• 
• 
• 
• 

How many bonds are stabilizing the carbocation below through hyperconjugation?

• 3

• 5

• 6

• 9

• 12

How many intermediates are present in the following reaction?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS1-4

The formation of a chiral center from an achiral starting material will result in the formation of an optically inactive solution.

• TRUE

• FALSE

The stereoselectivity and regioselectivity of halohydrin formation comes from when water, the nucleophile, attacks the bridge halonium ion intermediate, the electrophile.

• TRUE

• FALSE

Markovnikov's Rule states that in an electrophillic addition reaction with an alkene, a hydrogen atom of the electrophile will add the carbon with th eleast number o hydrogens in the double bond.

• TRUE

• FALSE

Identify the most stable carbocation.

• I

• II

• III

• IV

Tags

NGSS.HS-PS1-2