Reaction of triphenylphosphine with organic hydrotrioxides

Formation of hydrotrioxides during ozonation of hydrocarbons on silica gel. Decomposition of hydrotrioxides

“…35,46 Since quenching of CL emitters by hydroperoxide is negligible, the only explanation for the CL attenuation is the exchange of radicals according to reactions (14) and (15). Residual CL arises from incomplete capture of RO Á and HOO Á radicals by hydroperoxide.…”

“…Hydrotrioxide concentrations were determined using triphenylphosphine. 15 Decomposition products were analyzed by gas-liquid chromatography on a Chrom-5 chromatograph (370 Â 0.3 cm i.d. column, SE-30, 50-300°C, helium carrier gas, flame ionization detection).…”

Organic hydrotrioxides

“…At 778 8C, hydrotrioxides 6b,f oxidise triphenylphosphine into triphenylphosphine oxide nearly quantitatively, the reaction being completed during the mixing time of the reactants. 147 As the ratio of the initial concentrations, [Ph 3 P] 0 : [ROOOH] 0 , changes from 1 : 1 to 1 : 5 2, the ratio D[Ph 3 P] : D[ROOOH] increases from 1 to 2. The change in the stoichiometric coefficient is thought to be due to the reduction of a hydroperoxide by triphenylphosphine.…”

“…Fast and nearly quantitative reduction of HTO with an excess of triphenylphosphine serves as the basis for the method for quantitative determination of HTO by analysing the unconsumed Ph 3 P. 147 Pryor et al 29 used the reaction of Ph 3 P with the hydrotrioxide 8 in acetone at 773 8C for identification of the HTO 8. b. Phosphites Hydrotrioxides 1a, 4a,h, 5a, 6b,d,f oxidise phosphites into the corresponding phosphates (at 778 to 750 8C) in nearly quantitative yields. 148 Aromatic phosphites are oxidised somewhat slower than the aliphatic phosphites.…”

Synthesis and thermal decomposition of hydrotrioxide obtained by ozonization of exo-bicyclo[2.2.1]heptan-2-ol

“…The concentration of hydrotrioxide was determined by its reac tion with triphenylphosphine. 13 The solutions after ozonization contained 0.21-0.28 mol L -1 of the hydrotrioxide. Com pound 1 was identified by NMR spectroscopy at -70 °С.…”