Question

explain the preparation of alkynes from vicinal dihalides​

Answer 1

$\huge\mathbb\red{ANSWER}$

Pʀᴇᴘᴀʀᴀᴛɪᴏɴ ғʀᴏᴍ ᴠɪᴄɪɴᴀʟ ᴅɪʜᴀʟɪᴅᴇs

Tʜᴇ ʜᴀʟɪᴅᴇs ғᴏʀᴍᴇᴅ ʜᴀᴠᴇ ᴀ ʜᴀʟᴏɢᴇɴ ᴀᴛᴛᴀᴄʜᴇᴅ ᴛᴏ ᴀ ᴅᴏᴜʙʟᴇ-ʙᴏɴᴅᴇᴅ ᴄᴀʀʙᴏɴ. Tʜᴇsᴇ ʜᴀʟɪᴅᴇs ᴀʀᴇ ᴄᴀʟʟᴇᴅ ᴠɪɴʏʟɪᴄ ʜᴀʟɪᴅᴇs ᴡʜɪᴄʜ ᴀʀᴇ ɴᴏᴛ ʀᴇᴀᴄᴛɪᴠᴇ ɪɴ ɴᴀᴛᴜʀᴇ. Tʜᴇsᴇ ʜᴀʟɪᴅᴇs ᴀʀᴇ ᴍᴀᴅᴇ ᴛᴏ ʀᴇᴀᴄᴛ ᴡɪᴛʜ ᴛʜᴇ sᴛʀᴏɴɢ ʙᴀsᴇ ᴡʜɪᴄʜ ʀᴇsᴜʟᴛs ɪɴ ᴛʜᴇ ғᴏʀᴍᴀᴛɪᴏɴ ᴏғ ᴀʟᴋʏɴᴇs.

Answer 2

Preparation from vicinal dihalides :

The halides formed have a halogen attached to a double-bonded carbon. These halides are called vinylic halides which are not reactive in nature. These halides are made to react with the strong base which results in the formation of alkynes.