A novel synthesis of trifluoromethyl fluoroformate from trifluoromethyl hypofluorite and carbon monoxide in the presence of fluorine gas
作者:Libin Du、Darryl D. DesMarteau
DOI:10.1016/j.jfluchem.2008.06.017
日期:2008.10
Trifluoromethylfluoroformate is prepared through a radical reaction between CF3OF and CO initiated by elemental fluorine. The reaction could be integrated into a continuous synthesis process. This method represents a convenient synthesis of the title compound under mild condition.
Kinetics and mechanism of thermal gas-phase oxidation of hexafluoropropene in the presence of trifluoromethylhypofluorite, CF3OF
作者:M. dos Santos Afonso、R. M. Romano、C. O. Della Ve´dova、J. Czarnowski
DOI:10.1039/a908989f
日期:——
The basic steps are: the thermal generation of CF3O• radicals by abstraction of the fluorine atom from CF3OF by C3F6, chain initiation by the addition of CF3O• to olefin leading, in the presence of O2, to the formation of haloalkoxy radicals, which decompose via the C–C scission to give products containing C(O)F group and CF3• radicals, reforming CF3O•. The full mechanism is postulated.
Kinetics and mechanism of the thermal gas-phase oxidation of perfluorobutene-2 in presence of trifluoromethyl hypofluorite
作者:Rosana M. Romano、Carlos O. Della Védova、Joanna Czarnowski
DOI:10.1002/kin.10138
日期:——
CF3OC(O)F. Small amounts of compound containing CF(CF3)OC(O)CF3 group were also formed, as detected by 13C NMR spectroscopy. The oxidation is a homogeneous short-chain reaction, attaining, at the pressure of O2 used, the pseudo-zero-order condition with respect to O2 as reactant. The reaction is independent of the total pressure. Its basic steps are as follows: the thermal generation of CF3O• radicals by the
By reaction of cyanogen fluoride with fluorine compounds like COF2, SF4, SOF4 and HF in the presence of nucleophilic catalysts the addition products CF3NCO, CF3NSF2, CF3NSOF2 and CF3NH2 could be obtained together with polymer and copolymer products of FCN. By rearrangement and further reaction of intermediates also CF3OCOF, (CF3)2NCOF and the hitherto unknown compounds CF3N(CN)2 and F2CNCF2NSOF2