Oxidation of organic compounds by ozone on a surface .1. Ozonization of adamantane on silica gel

Adamantanol was obtained by the ozonization of adamantane, at -78 degrees C, adsorbed on silica gel. Ozone does not decompose on silica gel in the absence of a substrate. Ozonization of adamantane on silica gel is accompanied by chemiluminescence in the IR region. The chemiluminescence quenching is of first-order with the effective rate constant k'. In the range from 0.4 to 5 mmol, k' depends linearly on the amount of adamantane adsorbed on the silica gel. The activation energy E(a) = 9.97+/-1.89 kcal mol(-1) and the pre-exponential factor A = (2.76+/-0.52) . 10(6) were calculated from the temperature dependence of k'.