933-75-5Relevant articles and documents
Photocatalytic degradation of lindane by polyoxometalates: Intermediates and mechanistic aspects
Antonaraki,Triantis,Papaconstantinou,Hiskia
experimental part, p. 119 - 124 (2010/08/22)
The photocatalytic degradation of lindane (γ-1,2,3,4,5,6-hexachlorocyclohexane) has been studied in the presence of the polyoxometalate PW12O403- in aqueous solutions. Lindane is fully decomposed to CO2, Cl- and H2O, while a great variety of intermediates has been detected using GC-MS, including aromatic compounds (dichlorophenol, trichlorophenols, tetrachlorophenol, hexachlorobenzene, di- and trichloro-benzenodiol), non-aromatic cyclic compounds (penta-, tetrachlorocyclohexene, heptachlorocyclohexane), aliphatic compounds (tetrachloroethane) and condensation products (polychlorinated biphenyls). The number and nature of the intermediates implies that the mechanism of decomposition of lindane is based on both oxidative and reductive processes. Common intermediates have been reported during photolysis of lindane in the presence of titanium dioxide. A similar overall mechanism of polyoxometalates and TiO2 photocatalysis through the formation of common reactive species is suggested.
Process for functionalising a phenolic compound carrying an electron-donating group
-
, (2008/06/13)
The invention concerns a method for functionalizing a phenolic compound bearing an electron-donor group, in said group para position, inter alia a method for the amidoalkylation of a phenolic compound bearing an electron-donor group, and more particularly, a phenolic compound bearing an electron-donor group preferably, in the hydroxyl group ortho position. The method for functionalizing in para position with respect to an electron-donor group carried by a phenolic compound is characterised in that the phenolic compound bearing an electron-donor group is subjected to the following steps: a first step which consists of protecting the hydroxyl group in the form of a sulphonic ester function; a second step which consists in reacting the protected phenolic compound with an electrophilic reagent; optionally, a third step deprotecting the hydroxyl group.
THERMAL DECOMPOSITION OF 2,3,7,8-TETRACHLORODIBENZO-p-DIOXIN
Samsonov, D. P.,Rakhmanova, T. V.,Peryunina, R. I.
, p. 149 - 154 (2007/10/02)
The pyrolysis of 2,3,7,8-tetrachlorodibenzo-p-dioxin in an inert atmosphere in a closed system starts at temperatures above 350 deg C and can be described by a first-order equation.The presence of an oxidative or reductive atmosphere raises the rate of decomposition considerably.In an inert medium mainly dichlorination-chlorination processes occur.In the products of pyrolysis in air a considerable number of oxygen-containing compounds were identified.
