HOOO radical

K. Suma, Y. Sumiyoshi, and Y. Endo, The Rotational Spectrum and Structure of the HOOO Radical, Science, 308, 1885 (2005). 

Vibrational frequencies are reported for other four-atom molecules such as cis-OSOO, which was produced by laser irradiation (193 nm) of the planar SO3 in Ar matrices at 12 K [833], and the HOOO radical, which is probably in cA-conformation in inert gas matrices [834]. Vibrational assignments have also been made for linear four-atom molecules containing CN groups CNCN(isocyanogen) [835], HCCN radical (cyanomethylene), [836] [FCNF] [837], and a pair of HBeCN and HBeNC that were formed by reacting Be atom with HCN in Ar matrices at 6-7 [838],... 

Dioxin, M. Ebb, E. Ferments. Mir, Moscow, 1966, p. 277 Cerkovnik, J. , Eizen, E. Roller, J. Plesni ar, B. Evidence for HOOO. radicals in the formation of alkyl hydrotrioxides (ROOOH) and hydrogen trioxide (HOOOH) in the ozonation of C-H. bonds in hydrocarhons. Journal of the American Chemical SodetylQQl, 124(3), 404-409. Kamogitzkii, V. Organic Peroxides. IL, Moscow, 1961, p. 115. 

Several reports have been made of high-resolution FTIR studies on various isotopic forms of 03." " The matrix-IR spectrum of the HOOO radical gave the following assignments (for the all- 0 isotopomer) vOH 3361 cm- vOO -I-500H 1223 cm" and 5000 566 cm-. " " The IR spectrum of ozone trapped in an argon matrix includes features due to (03)2." ... 

As was stated earlier, a A,7/298 value of 131 kJ moP can be estimated for HSSS . From that the HS-SS BDE is found to be 140 kJ moP. This is much larger than the S-O BDEs in the analogous HSOO and CH3SOO radicals, which were seen above to be 32 and 49 kJ moP, repectively. In totally oxygenated ROOO radicals the corresponding 0-0 bonding is either negligible or at best much weaker, since in water HOOO has a half life of 6 ps with respect to formation of OH and O2 [54]. 

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