Answer Happy

1a) Which substance in each of the following pairs will make a
SN2 reaction go faster?
a. 1) CH3CH2Br, 2) water,
3) (CH3)3CBr,
4) BrCH=CHCH3, 5) H2O
b. 1) CH3CH2I, 2) water,
3) CH3Br, 4) BrCH=CHCH3,
5) CH3CO2–
c. 1) CH3CH2Br, 2) DMSO,
3) (CH3)3CBr,
4) BrCH2CH=CH2, 5) H2O
d. 1) CH3CH2I, 2) DMSO,
3) CH3Br, 4) BrCH=CHCH3,
5) CH3CO2–
e. 1) CH3CH2I, 2) DMSO,
3) CH3Br,
4) BrCH2CH=CH2,
5) CH3CO2–
1b) Which of the following carbocations is the most stable?
a. 4
b. 5
c. 2
d. 3
1) CH3CH₂l or CH3CH₂Br as substrate 2) Water or dimethyl sulfoxide (DMSO) as solvent 3) CH3Br or (CH3)3CBr as substrate 4) BrCH₂CH=CH₂ or BrCH=CHCH3 as substrate 5) H₂O or CH3CO₂ as nucleophile

CH3* 1 2 3 4 5 (@