TETRAKIS (MU-DIFLUOROACETATO)DIMOLYBDENUM(II) - SOLUTION CHEMISTRY AND MASS-SPECTRUM

The complex Mo-2(O2CCHF2)(4) has been prepared and characterized, and its solution chemistry has been studied. In acetone, it exists as the axial adduct; in pyridine, it exists as a mixture of axial and monoequ atorial adducts which undergo exchange. It forms axial, mono- and dieq uatorial adducts with tributylphosphine in acetone; these adducts also exchange. This complex undergoes less carboxylate ring-opening with p yridine or tributylphosphine than does Mo-2(O2CCF3)(4) under identical conditions. In the mass spectrometer, Mo-2(O2CCHF2)(4) fragments via early losses of CHFCO2 and F, processes analogous to those undergone b y Mo-2(O2CCF3)(4).