`ClO^(-)` has `(17+8+1)`=26 electrons. It is iso-electronic with two neutral molecules.
Oxygen difluoride `(OF_(2)) : 8 +18=26` electrons
Chlorine fluoride (CiF) : `17+9=26` electrons
Out of these, CIF can act as Lewis base. The atom chlorine has three lone electron pairs which it donates to form compounds like `ClF_(3) , ClF_(5) " and " ClF_(7)`.
