Organic Chemistry
:
I. I. True/False Questions
1 pt for the right answer but -1 pt for the wrong one
1. E2 reaction mechanism predominates when 1-bromo-1-propylcyclopentane is
treated with sodium methoxide in methanol. ( )
2. Alcohols are typically poor electrophile because the hydroxide ion, a relatively
strong base, is a very poor leaving group. ( )
3. In a Grignard reagent, the carbon bonded to the magnesium has a partial positive
charge, because carbon is less electronegative than magnesium. ( )
4. The major type of reactions that alkanes undergo is free radical addition reactions.
()
II. Multiple Choice: Select all answers for each question (mark circles)
1 pt for the right answer but -1 pt for the wrong one
5. Which of the following correctly reflects relative stabilities of carbocations?
A) 3° allylic > 2° > 1° benzylic B) methyl > 2° benzylic > 3° C) 3°
benzylic > vinyl > 1° D) 2° allylic > 2° > vinyl
E) 1° benzylic > 3° > 3° allylic
6. Which of the following alkyl halides forms the most stable carbocation when
it undergoes an E1 reaction?
:
I. I. True/False Questions
1 pt for the right answer but -1 pt for the wrong one
1. E2 reaction mechanism predominates when 1-bromo-1-propylcyclopentane is
treated with sodium methoxide in methanol. ( )
2. Alcohols are typically poor electrophile because the hydroxide ion, a relatively
strong base, is a very poor leaving group. ( )
3. In a Grignard reagent, the carbon bonded to the magnesium has a partial positive
charge, because carbon is less electronegative than magnesium. ( )
4. The major type of reactions that alkanes undergo is free radical addition reactions.
()
II. Multiple Choice: Select all answers for each question (mark circles)
1 pt for the right answer but -1 pt for the wrong one
5. Which of the following correctly reflects relative stabilities of carbocations?
A) 3° allylic > 2° > 1° benzylic B) methyl > 2° benzylic > 3° C) 3°
benzylic > vinyl > 1° D) 2° allylic > 2° > vinyl
E) 1° benzylic > 3° > 3° allylic
6. Which of the following alkyl halides forms the most stable carbocation when
it undergoes an E1 reaction?
