2243.     MEYER, G., AND SCHEFFER, F. E. C.  [Carbide of Nickel.]  Rec. trav. chim., vol. 46, 1927, pp. 1-7; Chem. Abs., vol. 21, 1927, p. 1236.

        When CO is passed over Ni at approximately 250° for several hours, CO₂ and a carbide of Ni are formed.  The existence of the latter is shown by its interaction with concentrated HCl to form hydrocarbons, which can be analyzed by ordinary methods.  Combustion with CuO or by exploding a mixture of the hydrocarbons and O₂ gave identical results for CO₂, but the latter method gave lower values for H₂.  This difference is ascribed to the presence of some unsaturated hydrocarbons.  Experiments at 700° accord with the data on the dissociation of CH₄; no carbide is formed by the interaction of CO and Ni, and the carbide formed at lower temperatures is decomposed into Ni and O on heating at that temperature.