(2)

The chemical structure of the

Structural effect of acidity:

Removal of a proton, H+ , decreases the formal charge on an atom or molecule by one unit, thereby increasing the acidity of the reaction.

Similarly adding of a proton, H+ , increases the formal charge on an atom or molecule by one unit, thereby increasing the basicity of the reaction.

Observe the structure:

Write the structure in the chemical formula.

Hence vinyl accepts a hydrogen atom, hence the charge on the atom is increased by 1 unit.

Hence the acidity of the reaction decreases.

Predict the direction of equilibrium:

Conditions for the direction of equilibrium:

The reaction will proceed in the direction to form the weaker base! The reaction will proceed in the direction to form the weaker acid!

Hence the weaker base is .

As the products dominate the reactants, the equlibrium lies to the left.