H H Heavy Metal Acetylides Terminal alkynes form a precipitate with Ag or Cu( salts Internal alkynes do not react Two uses Qualitative test for terminal alkyne Separation of a mixture of terminal and internal alkynes Chapter 9 16Chapter 9 16 Heavy Metal Acetylides • Terminal alkynes form a precipitate with Ag(I) or Cu(I) salts. • Internal alkynes do not react. • Two uses: ➢Qualitative test for terminal alkyne ➢Separation of a mixture of terminal and internal alkynes. =>