Question

Organic Chemistry:

Vocabulary:

i.)

If we have a weakly basic nucleophile and a secondary haloalkane we’ll generally get _ mechanism(s).

a. SN1 only

b. SN2

c. E2

d. E1 only

e. SN1 and E1

f. no reaction

This mechanism will have ____ stereochemistry,

a. predictable

b. random

due to the ____.

a. planar intermediate

b. backside attack transition state

c. frontside attack transition state

d. anti-periplanar transition state

_____________________________________________________

ii.)

Carbocation rearrangements will tend to form the __ stable intermediate.

a. less

b. more

c. equally

Carbocation rearrangements will tend to occur with which mechanism(s)? (select all)

a. SN1

b. SN2

c. E1

d. E2

_____________________________________________________

iii.)

Which of the following can be described as trans? (select all that apply)

-a linear alkane with 2 groups

-a linear alkane with 3+ groups

-a cycloalkane with 2 groups

-a cycloalkane with 3+ groups

-an alkene with 2 groups

-an alkene with 3 or more groups

A 1:1 mix of enantiomers is called a _____________ mix.

_____________________________________________________

v.)

SN1 reactions have the same rate determining step as _ reactions.

a. SN2

b. E2

c. E1

d. all of these

e. none of these

The rate determining step for an SN1 reaction is: ___________________

_____________________________________________________

vi.)

_ is the most selective halogen in radical halogenation reactions.

a. Fluorine

b. Chlorine

c. Bromine

d. Iodine

Selective reactions tend to be overall:

a. Very exothermic

b. slightly exothermic

c. slightly endothermic

d. very endothermic

Answer 1

i) b. SN2

b. backside attack transition state

ii) b. more

a. SN1

c. E1

iii) -an alkene with 2 groups

A 1:1 mix of enantiomers is called racemic mix

v) c. E1

The rate determining step for an SN1 reaction is the loss of the leaving group to form the intermediate carbocation

vi) c. Bromine

d. very endothermic