Question

which of the following is more acidic and why ? but-1-yne or but -2-yne. ?

Answer 1

Hey Mate..

According to the structure, the carbon numbered as 1, in, 1-butyne has a hydrogen attached to it. This carbon atom is ‘sp’ hybridised, which means it has a higher s character that means higher electronegativity, therefore, the tendency to donate the H+ ion will be higher in 1-butyne.

And in 2-butyne, both the carbons involved in triple bonding does not have a hydrogen atom, and the terminal carbon atoms are ‘sp3’ hybridised, meaning less ‘s’ character in them, therefore the tendency to donate H+ ion will be less.

Hence, 1-butyne is more acidic than 2-butyne.

Thank You..