Asked by: Youssou Omelin
asked in category: General Last Updated: 25th March, 2020

Are alkynes more acidic than alkenes?

Now the reason why alkynes are more acidic than alkenes, which are in turn more acidic than alkanes, is that sp carbon atoms are more electronegative than sp2 carbon atoms, which are in turn more electronegative than sp3 carbon atoms. Hence alkyne is more acidic than Alkane.

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Similarly, it is asked, which alkyne is most acidic?

Thus, ethyne is most acidic of all four compounds.

Similarly, why are alkynes acidic in nature while alkenes are not? Alkynes are acidic in nature, whereas alkenes and alkanes are not. 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. Now s-orbital penetrates more towards the nucleus, the electrons in it are more tightly held.

Likewise, people ask, why are terminal alkynes more acidic?

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. The high level of s character in an sp-hybridized carbon causes the overlap region of the σ bond to shift much closer to the carbon atom.

Are alkanes acidic or basic?

Second, the carbon-hydrogen bonds make alkane molecules neither acidic nor basic because the electronegativity of both elements is very similar. Thus, alkanes make poor acids. Likewise, a lack of nonbonded electron pairs on either the carbon or hydrogen atoms makes alkanes poor bases.

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