1. Choose the best specific example for the sequence: 1) RH + light + Br 2 --->
ID: 986169 • Letter: 1
Question
1. Choose the best specific example for the sequence:
1) RH + light + Br2 ---> 2) + KOH --->?
?a. 1-butene from butane??????
?b. 2-methyl-2-proponal from 2-methylpropane
?c. benzaldehyde alcohol from toluene
?d. styrene from ethylbenzene
2. Select the reactions that can be employed to make 2-butanol.
?1. propanal + methylmagnesuimbromide 2. 1-butene + H3O+
?3. CH3CH2CH2MgBr + CH2=O 4. ethyllithium + oxirane
?5. acetone + CH3MgBr
?a. 1,2 ?
?b. 2,3?
?c. 3,4?
?d. 4,5
3. What are feasible mechanisms?
?1. Sn with inversion 2. Sn with retention 3 E, Addition 4. Addition, E
?a. 1,3
?b. 2,3
?c. 3,4
?d. 1,4
4. Oxidation with chromic acid (dichromate + sulfuric acid) will result in a color change for which compounds?
1???2???3??4
?a. 1,2
?b. 2,3
?c. 3,4
?d. 1,4
5. ????a? b? c? d
6.???a? b? c ??d??
Explanation / Answer
ANSWER
Dear candidate the images have not been uploaded properly. Rather no image has been uploaded. Further according to guidelines one question one time. Still we solve first two questions Please send others separately
Q1 1) RH + light + Br2 ---> 2) + KOH --->
Option (D) is correct answer
EXPLANATION: Ethyl group of ethyl benzene wili undergo bromination in presence of light. The brominated product (2) will undergode eleimination to form styrene.
Option (A) is also relevant answer to the shown reaction. Butane will be brominated in presence of light, and the brominated product will undergo elimination reaction to form 1-butene.
Q2
The desired product 2-butanol can be produced by reaction 1 and 2. Hence OPTION (A) IS CORRECT ANSWER.
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