Engineering
Chemistry
Nucleophilic Substitution
Alkene
IUPAC Nomenclature of Organic Compound
Question

The synthesis of 3‑octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are

BrCH2CH2CH2CH3 and CH3CH2CCH

BrCH2CH2CH2CH2CH3 and CH3CH2CCH

BrCH2CH2CH2CH2CH3 and CH3CCH

BrCH2CH2CH3 and CH3CH2CH2CCH

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Solution

 CH3CH2CCHNaCH2CH3CH2CCNa+

 CH3CH2CH2CH2Br+CH3CH2CCNa+CH3 – CH2 – CH2 – CH2 – C C – CH2 – CH3