please help me with the question below: Consider Table 4 and suggest why BrCH2CH2Br (35.8 vs. 5.7) has a higher SN2 reaction rate than FCH2CH2Br.

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please help me with the question below:


Consider Table 4 and suggest why BrCH2CH2Br (35.8 vs. 5.7) has a higher SN2 reaction rate than FCH2CH2Br.

Table 4. Relative Rates for the SN2 and E2 Reactions of Dianions
with Alkyl Bromides
CH3CH₂Br
FCH₂CH₂Br
CICH₂CH₂Br
BrCH₂CH₂Br
EtCH₂CH₂Br
SN2
1.0
5.7
13.7
35.8
2.8
I
E2
0.0
0.0
3.5
17.1
0.4
SN2
1.7
9.3
a
a
II
E2
0.1
4.7
530
780
Transcribed Image Text:Table 4. Relative Rates for the SN2 and E2 Reactions of Dianions with Alkyl Bromides CH3CH₂Br FCH₂CH₂Br CICH₂CH₂Br BrCH₂CH₂Br EtCH₂CH₂Br SN2 1.0 5.7 13.7 35.8 2.8 I E2 0.0 0.0 3.5 17.1 0.4 SN2 1.7 9.3 a a II E2 0.1 4.7 530 780
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