Question

In each reaction box, place the best reagent and conditions from the list below.

In each reaction box, place the best reagent and conditions from the list below. 2 equiv. NaNHz excess NaNH2 CH3Br H20, H2SO4, HgSO4 Na, NH3 (1) H2O2, NaOH, H2O NaBH4 HBr Br2 CH3CH2Br H2. Lindlar catalyst BH3/THF PBr3

Answer 1

1) Br2

2) excess NaNH₂

3) CH₃CH₂Br

4) H2, Lindlard's catalyst

Explanation: Reaction of alkene with Br2 produced dibromo compound as product. NaNH2 is a strong base which gives dehydrohalogenation and produces acetylide ion which on further reaction with alkyl halide produces an extended carbon chain as product. Reduction of alkyne with H2,Lindlard's catalyst produces cis-alkene as product.