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Problems and exercisesElectrophilic Addition

1. Reactions of 1-pentyne

Predict the result of the following processes:

1-Pentyne with: H₂SO₄, H₂O, HgSO₄; 9-BBN then H₂O₂, NaOH; HBr (2 eq); HCl (1 eq); Br₂ (2 eq) in CCl₄; NaNH₂, NH₃ then MeI

2. From alkyne to ketone

Which alkyne would you use to obtain 2-pentanone as the only hydration product? Why does 2-pentyne not work?

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