Question

a. In what direction is the dipole moment in fulvene? Explain.

b. In what direction is the dipole moment in calicene? Explain.

Short answer

The direction of dipole moment are given below for those compounds,

Step-by-step solution

Definition of dipole moment

Dipole moment is defined as the multiplication of the charge separation between two atoms and the distance at which the two charges resides.

The mathematical expression of dipole moment is

Dipole moment(µ) =electrical charge (e) × distance (d)

The unit of dipole moment is debye.

Mechanism

To see the direction of dipole moment, we have to break this alkene into charged species maintaining the stability of the compound.

The above picture shows the possible structure and the one which will form maintaining stability. The direction of dipole moment in those stable compounds has given above. (Direction of dipole moment is from negative to positive end).