The two alkenes shown below were synthesized from alkynes. Identify the alkyl br

Question

The two alkenes shown below were synthesized from alkynes. Identify the alkyl bromides that were reacted with acetylene to form the alkyne, and the method of alkyne reduction. The alkyl bromide used for alkylation of the 'left' side (as drawn) of acetylene: CH3(CH2)6CH2Br CH3(CH2)nCH2Br CH3(CH2)3CH2Br (CH3)2CHCH2Br CH3CH2CH(CH3)CH2CH2Br The alkyl bromide used for alkylation of the 'right' side (as drawn) of acetylene: CH3(CH2)6CH2Br CH3(CH2)nCH2Br CH3(CH2)3CH2Br (CH3)2CHCH2Br CH3CH2CH(CH3)CH2CH2Br The method of alkyne reduction: H2/Lindlars Li/NH3 The alkyl bromide used for alkylation of the 'left' side (as drawn) of acetylene: CH3(CH2)6CH2Br CH3(CH2)nCH2Br CH3(CH2)3CH2Br (CH3)2CHCH2Br CH3CH2CH(CH3)CH2CH2Br The alkyl bromide used for alkylation of the 'right' side (as drawn) of acetylene: CH3(CH2)6CH2Br CH3(CH2)nCH2Br CH3(CH2)3CH2Br (CH3)2CHCH2Br CH3CH2CH(CH3)CH2CH2Br The method of alkyne reduction: H2/Lindlars Li/NH3

Explanation / Answer

a)

1. The alkyl halide used for left hand side,

e) CH3CH2CH(CH3)CH2CH2Br

2. The alkyl halide used for right hand side,

e) CH3CH2CH(CH3)CH2CH2Br

3. The method of alkyne reduction is,

b. Li/NH3

B)

1. the alkyl haldie used for left hand side,

d. (CH3)2CHCH2Br

2. The alkyl halide used for the right hand side,

d. (CH3)2CHCH2Br

3. The method of alkyne reduction is,

a. H2/Lindlars

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