Dioxygen and ozone

Oxygen is the most abundant element on the earth s surface. It occurs both in the free state and as a component in innumerable compounds. The common allotrope of oxygen is dioxygen (O2) or oxygen gas the other allotrope is ozone (O3). 

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The initiating action of ozone on hydrocarbon oxidation was demonstrated in the case of oxidation of paraffin wax [110] and isodecane [111]. The results of these experiments were described in a monograph [109]. The detailed kinetic study of cyclohexane and cumene oxidation by a mixture of dioxygen and ozone was performed by Komissarov [112]. Ozone is known to be a very active oxidizing agent [113 116]. Ozone reacts with C—H bonds of hydrocarbons and other organic compounds with free radical formation, which was proved by different experimental methods. 

Listed in the Table 6.1 are some of the more common sources of oxygen employed for oxidations of organic compounds. Dioxygen is not listed because it requires a catalyst for oxidation at low temperatures. Likewise, hydrogen peroxide and ozone exhibit different activities when used with the proper heterogeneous catalyst. 

FLealth and environmental effects resulting from exposure to ozone are caused by the compound s very strong oxidizing properties. Ozone molecules decompose readily to form dioxygen and atomic oxygen, which is highly reactive. 

Oxygen (dioxygen), O2, and ozone (trioxygen), O3, are the two small gaseous allotrope molecules of the element oxygen. 

Oxygen has two allotropes, the normal dioxygen 02 form and ozone 03(1) formed by subjecting 02, to an electric discharge. Ozone is a trace constituent of the atmosphere, where it plays an important role as an absorber of UV radiation. 

Oxygen exists in three allotropic forms. Allotropes are forms of an element with different physical and chemical properties. The three allotropes of oxygen are normal oxygen, or diatomic oxygen, or dioxygen nascent, atomic, or monatomic oxygen and ozone, or triatomic oxygen. The three allotropes differ from each other in a number of ways. 

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