Molybdenum(VI) chloride is the inorganic compound with the formula . It is a black diamagnetic solid. The molecules adopt an octahedral structure as seen in ò-tungsten(VI) chloride.
Molybdenum(VI) chloride is prepared from the molybdenum hexafluoride with excess boron trichloride:
It is unstable at room temperature with respect to molybdenum(V) chloride and chlorine and decomposition completes within several days: