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Question #2 A) Which of the following is a good nucleophile and a poor base? a....

Question #2

A) Which of the following is a good nucleophile and a poor base?
a. OH-1

b. (CH3)3CO-1

c. CH3C-(triple bond)-C-1

d. H2O

e. H2C=CH2

B) To make a trans diol from an alkene, you must
a. first make an epoxide

b. use OsO4

c. use KMnO4

d. use HIO4

C) An E1 reaction is the reverse of which reaction?
a. E2

b. free radical substitution

c. addition to an alkene

d. SN2

e. SN1

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Homework Answers

Answer #1

A) option C is correct. It acts as a good nucleophile and it is not a good base.

B) option A is correct. (You must make epoxide first by treating alkene with any peroxide and then open the epoxide ring using hydroxide ion to form a trans-diol from alkene.)

C) option c is correct (In E1 elimination reaction dissociation of leaving group followed by abstraction of proton occurs. In addition reaction to allkene, addition of proton to double bond occurs first to form a carbocation. Then thenucleophile will attack the carbocation to form the product. So addition reaction is the reverse of elimination (E1) reaction.)

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