Question

why alkynes thermal C-H is acidic but alkenes and alkanes are not?​

Answer 1

Answer:

The acidity of a terminal alkyne is due to the high level of s character in the sp hybrid orbital, which bonds with the s orbital of the hydrogen atom to form a single covalent bond. ... In reality, the hydrogen atoms bonded to alkanes and alkenes can be removed as protons, but much stronger nonaqueous bases are necessary.

Explanation:

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Answer 2

Answer:

The carbon atoms of alkynes have greater s-character as compared to the double bonded carbon atoms of alkenes and singly bonded carbon atoms of an alkane. As a result, a proton is easily knocked out from – C ≡ C – H as compared to and , hence acidic character.