Potassium–graphite intercalates (C24K) can act as a catalyst for the reduction of olefins and alkynes. C24K is a very efficient catalyst for the isomerization of cis-stilbene to trans-stilbene. C24K can promote deuterium exchange with hydrogens carried by hydrocarbons having an acidity equal to or higher than that of benzene. C24K can condense benzene to biphenyl and can isomerize 2-alkynes to 1-alkynes at low temperature.

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. Can. J. Chem. 54, 2505Chem. 54, (1976.Some chlorides, mainly of transition elements, can be intercalated in graphite from a solution of carbon tetrachloride if their solubility is in the range of 1 to 4 mg/ml in CCL, at reflux temperature, in the presence of chlorine.The rate of extraction of intercalated salts with solvents has been compared to the rate of solution of these salts in the same solvents.JEAN MARC LALANCETTE, LINDA ROY et JEANNINE LAFONTAINE. Can. J. Chem. 54, 2505 (1976).Certains chlorures derives principalement des metaux de transition ont pu &tre inserts dans le graphite, en presence du chlore et a la temperature de reflux, a partir de leurs solutions dans le tetrachlorure de carbone lorsque leurs solubilites se situaient dans la region 1 a 4 mg/ml de CCI,.La vitesse &extraction des sels inserks par certains solvants a 6te comparte a la vitesse de dissolution de ces sels dans les m&mes solvants.