The two alkenes shown below were synthesized from alkynes. Identify the alkyl br
ID: 911680 • Letter: T
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. CH_3(CH_2)6CH_2 CH_2(CH_2)3CH_3 The alkyl bromide used for alkylation of the left side (as drawn) of acetylene: CH_3(CH_2)6CH_2Br .CH_3(CH_2)nCH_2Br CH_3(CH_2)3CH_2Br (CH_3)2CHCH;Br CH_3CH_2CH(CH_3)CH_2CH_2Br The alkyl bromide used for alkylation of the right side (as drawn) of acetylene: CH_3(CH_2)6CH_2Br CH_5(CH_2)nCH_2Br CH_3(CH_2)3CH_2Br (CH_3)2CHCH_2Br CH_3CH_2CH(CH_5)CH_2CH_2Br The method of alkyne reduction: H; Lindlars LiNH3 (CH_3)2CHCH_2m CH_2(CH_2)3CH_3 The alkyl bromide used for alkylation of the left side (as drawn) of acetylene: CH_3(CH_2)6CH_2Br CH_3(CH_2)nCH_2Br C'H3(CH_2)5CH_2Br (CH_3)2CHCH_2Br CH_3CH_2CH(CH_5)CH_2CH_2Br The alkyl bromide used for alkylation of the right side (as drawn) of acetylene: CH_3(CH_2)6CH_2Br CH_3(CH_2)nCH_2Br C'H3(CH_2)5CH_2Br (CH_3)2CHCH_2Br CH_3CH_2CH(CHExplanation / Answer
a) 1.Answer: (a)CH3(CH2)6CH2Br ( HBr Elimination takes place)
2.Answer: (c) BrCH2(CH2)3CH3 (HBr elimination takes place)
3. Answer: (a) (Lindlars catalyst: Is the formation of Alkynes to Cis-Alkenes).
b) 1) Answer: (d)
2) Answer: (c)
3) Answer:(b) (In this case Alkynes to Trans Alkenes formation takes place).
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