Oxygen compounds of halogens X₂O₂(X is a halogen atom)

Nitrosyl and dioxygenyl cations and their salts—Similar but further investigation needed

“…The O 2 F is a radical [8] that exists only at low temperature. It is thermodynamically unstable towards O 2 and F 2 .…”

“…is given by DHð3Þ=kJ mol À1 % U POT ðNOSbF 6 Þ À U POT ðO 2 SbF 6 Þ ¼ 566 À 560 ¼ þ6 (8) or, equivalently, by…”

Investigation of heterodimeric and homodimeric radical cations of the series: [F2O2]+, [F2Cl2]+, [Cl2O2]+, [F4]+, and [Cl4]+

“…2 Note, that the weakly bound neutral Cl 2 O 2 species was predicted to show a ''hockey stick'' structure like for the recently predicted [F 5 ] 214 and no trapezoidal one like for the cation. 15,16 Contrary to the structures of the [X 4 ] + and [X 2 O 2 ] + (X = F, Cl) cations, the homodimeric [F 2 Cl 2 ] + cation is not planar. Instead it has a twisted structure of only C 2 symmetry where the F 2 and Cl 2 units are skewly arranged; the C 2v -symmetrical trapezoidal structure analogous to the [X 2 O 2 ] + cases showed an imaginary frequency of 58.5 cm 21 at CCSD(T)/aVTZ level.…”

Theoretical Mechanism Study on the Reaction of FOO Radical with NO

“…Free radical FOO is generated in the collision of fluorine and oxygen system at low temperature (e.g., photolysis and radiolysis) [1]. It is one of the most important free radicals containing fluorine in atmosphere and has considerable high thermodynamic stability.…”