THE PHOTOCHEMICAL-REACTION BETWEEN CHLORINE AND CHLORINE PERCHLORATE AT 366 NM

The photolysis of Cl-2 in the presence of Cl2O4 at 366 nm in the gaseo us phase has been investigated at 303 K. The UV absorbance of the gas mixture has been recorded spectrophotometrically after each photolysis interval to monitor the reactant Cl2O4 pressure and determine quantit atively the chlorinated reaction products. A quantum yield for Cl2O4 c onsumption of 2.0 +/- 0.2 has been determined. The main reaction produ cts are Cl2O7, Cl-2 and O-2, accompanied by small quantities of Cl2O6 and OClO. A mechanism involving ClO4 radicals formed in the Cl atom ab straction from Cl2O4 by Cl is proposed. (C) 1998 Elsevier Science S.A.