1.(2 pts) Circle the alkyI halide which would most likely undergo an SN2 and box

Question

1.(2 pts) Circle the alkyI halide which would most likely undergo an SN2 and box the one most likely to undergo an E2- a) b) Br d) e) Br Br 2.(1 pt) Circle the strongest nucleophile in an SN2 reaction a) b) c) d) H2O CH3CO HO NH3 Br 3.(2 pts) Which statement below is FALSE about an SN1 reaction? a) Rate k [Alkyl halide] [ Nuc b) Order of reactivity is Ri>RBr > RCI> RF c) Process is unimolecular d) Substrate trends 30 20> 10> CH3 e) Reaction involves a carbocation 4.(5 pts) Answer the following questions with SN1, SN2, E1, and E2. Fill in the blanks. a) reaction that only gives inversion of configuration:- b) using a STRONG base will increase the rate of this reaction c) reaction of 2-bromobutane with methanol occurs primarily by: d) reaction involves carbocations that can rearrange e) reaction that is favored in a POLAR APROTIC type solvent

Explanation / Answer

1. Alkyl halide to undergo fastest SN2 reaction,

c)

Alkyl halide to undergo fastest E2,

d)

In c) it is primary alkyl halide, which prefers to undergo an SN2 reaction. Whereas, in d) a sterically hindered tertiary alkyl halide goes E2 to release the strain.

2. The strongest nucleophile in SN2 reaction would be,

d) OH-

the -vely charged nucelophile which can donate its pair of electron to form a bond is most effective nucleophile.

3. False statement about SN1 reaction is,

a) rate = k[alkyl halide][Nuc]

SN1 is a unimolecular reactions, whose rate depends only upon the concentration of strating material.

4. Fill in the blanks

a. Reaction that gives only inversion of configuration - SN2

b. using a strong base would increase rate of the reaction - E2

c. reaction of 2-bromobutane with methanol occurs primarily by - SN1

d. reactions involve carbocations that can rearrange - SN1, E1

e. reactions that are favoured in polar aprotic solvents - SN2

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