A New Oxide of Carbon

    Abstract

    THE current number of the Berichte der deutsehen chemischen Geseitsehaft (1906, xxxix., p. 689) contains a preliminary communication by Messrs. Otto Diels and Bertram Wolf, of the Berlin University, giving an account of the preparation and properties of a new oxide of carbon having the composition C3O2, for which they propose the name carbon suboxide. The new oxide is obtained from ethyl malonate, CH2(CO2C2H5)2, by subjecting the vapour of the latter to the action of phosphorus pentoxide at 300°; under these conditions two molecules of water are removed by the action of the latter reagent, and a mixture of ethylene and carbon suboxide formed, the reaction being expressed by the equation

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