Ozone Formation through Decomposition of CFCs in the Stratosphere

Abstract

A R3 BuOOH K 1 R2 -2 D Scheme 3. Ligand exchange processes for the bi-(rBuOOH) and tridentate (P-hydroperoxy alcohol) oxygen donors in the generation of the loudid titanium templates A and D required for the oxygen transfer ( I + 2).

New Route to the Synthesis of Difluorodioxirane from FC(O)OF

“…Once these requirements were fulfilled, the IRMP irradiation experiments were performed as follows: the IR spectrum of the empty cell was first obtained and then about 4 Torr of total pressure of FC(O)OF was loaded into the cell, and another IR spectrum was taken. The sample was irradiated with 3000 pulses of the CO 2 laser tuned to the 10R32 emission line (983.29 cm -1 ), resonant with one of the absorption bands of the fluoroformyl hypofluorite (ν 3 (a′ )) 4 at a fluence of 19 J/cm 2 , without interference from the reaction products. After being irradiated, a new IR spectrum was taken; a new sample of FC(O)OF was loaded; and without irradiation, it was observed whether or not spontaneous reaction occurred by taking sequenced IR spectra every 5 min.…”

“…Studies on infrared multiphoton (IRMP) excitation using a pulsed CO 2 laser have been undertaken in this paper. The results obtained show that the main reaction path goes through a heterogeneous reaction whose ultimate fate is the catalytic isomerization of FC(O)OF to F 2 CO 2 , a stable isomer proposed as an intermediate in the probable formation of O 3 by CF 2 in the stratosphere …”

“…The results obtained show that the main reaction path goes through a heterogeneous reaction whose ultimate fate is the catalytic isomerization of FC(O)OF to F 2 CO 2 , a stable isomer proposed as an intermediate in the probable formation of O 3 by CF 2 in the stratosphere. 4 Difluorodioxirane is the only known dioxirane that may be isolated as a pure substance and that may be thermally stabilized in the gas phase at room temperature. Its stability has allowed detailed high-resolution vibrational-rotational spectroscopic diffraction studies as well as electron diffraction studies.…”