* Molecular Geometry: ClF₄⁻ has a square planar geometry. The central chlorine atom has four bonding pairs and one lone pair of electrons.

* Dipole Moment: The four chlorine atoms are arranged symmetrically around the central chlorine, but the lone pair of electrons on the chlorine creates an uneven distribution of electron density. This results in a net dipole moment, making the molecule polar.

Think of it this way:

* The lone pair of electrons on the central chlorine atom pushes the four chlorine atoms slightly away, creating a slight negative charge on the side of the molecule with the lone pair and a slight positive charge on the opposite side.

Let me know if you'd like more details on the structure and bonding of ClF₄⁻!