New quadruply bonded dimolybdenum complexes of the terphenyl ligand Ar-Xyl2 (Ar-Xyl2 = C6H3-2,6-(C6H3-2,6-Me-2)(2)) have been prepared and structurally characterized. The steric hindrance exerted by the Ar-Xyl2 groups causes the Mo atoms to feature unsaturated four-coordinate structures and a formal fourteen-electron count.