Elementary reaction of CF2((X)over-tilde) with O-3: Primary products

The reaction of CF2((X) over tilde) with O-3 has been investigated in a dis charge flow reactor at room temperature and low pressure (p = 2.5 mbar). CF 2((X) over tilde) was produced by a microwave discharge of a mixture of CF2 Br2/He. The reactants and products were detected by mass spectrometers (MS) , which were connected to the flow systems via a continuous molecular beam sampling system. The following primary products were observed (CF2O3 (m/z = 98); CF2O (m/z = 47, 66); O-2 (m/z = 32)). The reaction mechanism: CF2((X) over tilde) + O-3 reversible arrow CF2O3# --> CF2O3 --> CF2O + O-2 explains the observed primary products. The molecule with the empirical for mula CF2O3 has been observed directly by MS; the structure is discussed.