Molybdenum chloride can refer to: Molybdenum(II) chloride (molybdenum dichloride), MoCl2 Molybdenum(III) chloride (molybdenum trichloride), MoCl3 Molybdenum(IV) chloride (molybdenum tetrachloride), MoCl4 Molybdenum(V) chloride (molybdenum pentachloride), MoCl5 Molybdenum(VI) chloride (molybdenum hexachloride), MoCl6