Final answer:
The correct formula for sulfur hexafluoride, which has an octahedral structure with sp³d² hybridization, is SF₆.
Step-by-step explanation:
The correct formula for sulfur hexafluoride is d. SF6. Sulfur hexafluoride is a compound with one sulfur atom and six fluorine atoms. The sulfur atom in sulfur hexafluoride exhibits sp3d2 hybridization and forms an octahedral structure around the sulfur atom, where each of the six sp3d2 hybrid orbitals are directed toward a corner of the octahedron, bonding to a fluorine atom.