* Electronegativity Difference: Oxygen is more electronegative than chlorine. While there is a difference in electronegativity, it's not large enough to form ionic bonds. The difference in electronegativity leads to polar covalent bonds.

* Shared Electrons: Oxygen and chlorine share electrons to form covalent bonds. This sharing results in the formation of a molecule.

* Overall Charge: OCl2 is a neutral molecule. There is no net positive or negative charge. Ionic compounds, in contrast, have a cation (positive ion) and an anion (negative ion).

In summary: OCl2 forms a molecular structure due to the sharing of electrons between oxygen and chlorine atoms through polar covalent bonds.