distinguish between but-1-yne and but -2-yne
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Explanation:
But-1-yne is a terminal alkyne and hence can be distinguished from buta-1,3-diene by Tollens' regent which forms white ppt. with but-1-yne and but not with buta-1,3-diene.
CH
3
CH
2
−C≡CH+[Ag(NH
3
)
2
]
+
OH
−
→CH
3
CH
2
−C≡C Ag+2NH
3
+H
2
O
But-1-yne Tollens' reagent Silver but-1-ynide
CH
2
−CH−CH=CH
2
+[Ag(NH
3
)
2
]
+
OH
−
→ No reaction.
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