29. Which of the following statement is correct? A. E2 is a concerted reaction in which bonds break and new bonds form at the same time in a single step B. Order of reactivity of alkyl halides towards E2 dehydrohalogenation is found to be 3° > 2°> 1° C. In E2 elimination different stereoisomer (diastereomer) converts into different stereo product D. A, B, and C E. A and B

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29 30 31

30. The relative rates of nucleophilic substitution for the given substrates are as follows:
Compound
Approx. Relative rate
CH;CH;Br
1.0
CH;CH;CH,Br
0.28
(CH3CHCH,Br
0.030
(CH3), CCH;Br
0.00000042
A. Each of the reactions above is likely to be Sn2
B. Each of the reactions above is likely to be SN1
C. The first two reactions follow SN2 and the next two reactions follow SN1
D. There is no role of steric factor
31. What is the main product of the following reaction?
Na* OEt
ETOH
Br
to
no reaction
OEt
A
в с
D
E
Transcribed Image Text:30. The relative rates of nucleophilic substitution for the given substrates are as follows: Compound Approx. Relative rate CH;CH;Br 1.0 CH;CH;CH,Br 0.28 (CH3CHCH,Br 0.030 (CH3), CCH;Br 0.00000042 A. Each of the reactions above is likely to be Sn2 B. Each of the reactions above is likely to be SN1 C. The first two reactions follow SN2 and the next two reactions follow SN1 D. There is no role of steric factor 31. What is the main product of the following reaction? Na* OEt ETOH Br to no reaction OEt A в с D E
29. Which of the following statement is correct?
A. E2 is a concerted reaction in which bonds break and new bonds form at the
same time in a single step
B. Order of reactivity of alkyl halides towards E2 dehydrohalogenation is found
to be 3° > 2°> 1°
C. In E2 elimination different stereoisomer (diastereomer) converts into different
stereo product
D. A, B, and C
E. A and B
Transcribed Image Text:29. Which of the following statement is correct? A. E2 is a concerted reaction in which bonds break and new bonds form at the same time in a single step B. Order of reactivity of alkyl halides towards E2 dehydrohalogenation is found to be 3° > 2°> 1° C. In E2 elimination different stereoisomer (diastereomer) converts into different stereo product D. A, B, and C E. A and B
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