Oxidation of unsaturated compounds with ozonized oxygen ozonolysis

A simple semimicro laboratory ozoniser is illustrated in Fig. VI, 14, 2 this gives reasonably satisfactory results for small quantities of organic 

Organic peroxides are highly explosive, hence it is best to carry out the ozonisation in a solvent which dissolves both the original compound and the ozonide. 

Preparation of palladium - calcium carbonate catalyst. Prepare 60 g. of precipitated calcium carbonate by mixing hot solutions of the appropriate quantities of A.R. calcium chloride and A.R. sodium carbonate. Suspend the calcium carbonate in water and add a solution containing 1 g. of palladium chloride. Warm the suspension until all the palladium is precipitated as the hydroxide upon the calcium carbonate, ix., until the supernatant liquid is colourless. Wash several times with 

Dissolve 7 g. of pure oleic acid in 30 ml. of dry ethyl chloride (chloroform may be used but is less satisfactory), and ozonise at about —30°. Remove the solvent under reduced pressure, dissolve the residue in 50 ml. of dry methyl alcohol and hydrogenate as for adipic dialdehyde in the presence of 0 5 g. of palladium - calcium carbonate. Warm the resulting solution for 30 minutes with a slight excess of semicarbazide acetate and pour into water. Collect the precipitated semicarbazones and dry the 

The Adams platinum oxide catalyst gives satisfactory results in the reduction of ozonides. 

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