No, iodine and sulfur would not form an ionic compound. This is because both iodine and sulfur are non-metals. In order for an ionic compound to form, there must be a transfer of electrons from one atom to another, resulting in the formation of positive and negative ions. However, since both iodine and sulfur are non-metals, they tend to share electrons rather than transfer them.

Therefore, iodine and sulfur would most likely form a covalent compound, where electrons are shared between the atoms to form molecules.