Molybdenum(III) chloride is the inorganic compound with the formula MoCl3.

[3] Molybdenum trichloride exists as two polymorphs: alpha (α) and beta (β).

The beta structure, however, exhibits hexagonal close packing.

The diethyl ether complex is synthesized by reducing a Et2O solution of MoCl5 with tin powder.

[6] Hexa(tert-butoxy)dimolybdenum(III) is prepared by the salt metathesis reaction from MoCl3(thf)3:[7]