Abstract
The complex Mo 2(O 2CCHF 2) 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 monoequatorial adducts which undergo exchange. It forms axial, mono- and diequatorial adducts with tributylphosphine in acetone; these adducts also exchange. This complex undergoes less carboxylate ring-opening with pyridine or tributylphosphine than does Mo 2(O 2CCF 2) 4 under identical conditions. In the mass spectrometer, Mo 2(O 2CCHF 2) 4 fragments via early losses of CHFCO 2 and F, processes analogous to those undergone by Mo 2(O 2CCF 3) 4.
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