Is sulfur hexachloride an ionic compound?

sulfur hexafluoride ( SF6 ) is ionic bond

No, It's a molecular or covalent compound

Explanation:

Let remember the concept of a ionic bond:

The Ionic bond is when it's transfered all of the valence electrons of the atoms. This always result in charged ions (positive and negative) and it's usually given between a metal and non metal element. The metal loses electrons (has a positive charge) while the non metal gains electrons (negative charges). For example Sodium and Fluorine to form the Sodium Fluorine (Na+ and F-)

In the case of SCl6 this is not ocurring. For starter, S and Cl are both non metals, so it's very unlikely that a transfer of all ions occurs. What it occurs in this case is another kind of bond, which is called covalent bond

A covalent bond is when two atoms share their electrons between them to form a stronger bond and result in a compound. In this case, the outer electrons are in the vicinity or the atoms, and then, begins to share those electrons and form a new bond and product.

In the case of SCl6, the 6 electrons of the S form a bond with one electron of each chlorine, sharing those electrons and they form the bond and a new compound.

This is something similar to what happens to the molecule of water. Therefore SCl6 it's covalent.

here are some of the ways in which chemical and nuclear reactions differ.

explanation: