Which of the following bases could be used to deprotonate 1-butyne?

(b)

Dimethyl sulfoxide is also called DMSO. It is an organometallic compound its chemical formula is (CH₃)₂SO. It is used as an organic solvent in the synthesis of various compounds. It is a polar aprotic solvent and it is a colourless liquid. It has a higher boiling point and lower melting point.

The structure of DMSO is:

Dimethyl sulfoxide has various applications such as:

As we know that a base will be able to deprotonate any other acid or not it totally depends on the value of conjugate acid of that base. If the value of conjugate acid of that base will be higher it will be a weak acid and the base of that conjugate acid will be able to deprotonate any other acid.

In the case of sodium methylsulfphonylmethylide, it is conjugate acid is dimethyl sulfoxide whose value is 35 which is higher than the value of 1- butyne i.e. value = 15.

Hence, sodium methylsulfphonylmethylide will deprotonate 1- butyne.