182274-19-7Relevant academic research and scientific papers
Chemistry of H2O+ with C2F4, C2F6, and CF3X (X = F, Cl, Br, I)
Morris, Robert A.,Viggiano, A. A.,Doren, Jane M. Van,Paulson, John F.
, p. 3051 - 3054 (1992)
The reactions of H2O+ with CF4, C2F6, C2F4, CF3Cl, CF3Br, and CF3I have been studied at 300 and 499 K.The measurements were conducted using a variable-temperature-selected ion flow tube apparatus.H2O+ reacts via charge transfer with C2F4 with rate constants equal to 1.4 x 10-9 and 1.5 x 10-9 cm3 s-1 at 300 and 499 K, respectively.The reactions with CF3X (X = Cl, Br, I) all proceed at the collision rate at 300 and 499 K within experimental uncertainty.The rate constants are in the range 1.6 x 10-9 - 2.1 x 10-9 cm3 s-1.The reactions of H2O+ with CF3X produce CF3+ and CF2X+ for X = Cl, Br, I, CF2OH+ for X = Cl, Br, and CF3X+ for X = Br, I.The reaction with CF3Cl also forms the ionic product CF3OH2+.No reaction was observed between H2O+ and the reactant neutrals CF4 and C2F6; the rate constants are less than 5 x 10-12 cm3 s-1 at 300 and 499 K.Upper limits to the heats of formation of CF2Cl+, CF2Br+, and CF2I+ have been derived from the data and are -1, respectively.
Reactions of H3O+ and H2O+ with several fully halogenated bromomethanes
Thomas,Kennedy,Mayhew,Watts
, p. 8489 - 8495 (1997)
The bimolecular rate coefficients and ion products for the reactions of H3O+ and H2O+ with the bromine-containing molecules CF3Br, CF2Br2, CF2BrCl, CFBr3, CFBr2Cl, and CBrCl3 at 300 K are reported. With the exception of the reactions of H3O+ with CF3Br and CF2BrCl, the rate coefficients are near the collisional values (k ≈ 10-9 cm3 molecule-1 s-1). The most efficient exit pathway for the majority of the H3O+ reactions is the formation of a trihalomethyl cation, together with water and a hydrogen halide as the neutral products. In each case, more than one trihalomethyl cation can be formed. The branching ratios are largest for the products resulting from the breaking of a C-F bond. This is attributed to the high bond strength of HF relative to HCl and HBr. Similarly for CBrCl3, the major product cation is CCl2Br+. The H2O+ reactions are found to proceed predominantly via charge transfer. For the reaction of H2O+ with CF3Br there is clear evidence for intimate reaction pathways in which bonds are broken and formed.
