Synthesis, characterization and reactivity of MoCl2 (O)(O2 )(OPR3)2, OPR3 = OPMePh2, OPPh3; an isomerization catalyst for some allylic alcohols

Adding one equivalent of H2O2 to compounds of stoichiometry MoCl2(O)2(OPR3)2, OPR3 = OPMePh2 or OPPh3, leads to the formation of oxo-peroxo compounds MoCl2(O)2(OPR3)2. The compound MoCl2(O)(O2)(OPMePh2)2 crystallized with an unequal disorder, 63%:37%, between the oxo and peroxo ligands and can be is