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ABSTRACTS
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JOURNAL FUER PRAXTISCHE CHEMIE.
Journal fuer Praktische Chemie. Abstractor.
E l l t i A R EVEXIIAX’r.
PH.D
O n the Desulp?mrixution of QuunidiiLe T?i,iocipnate, SIEGB Y K(20, 32Y).-‘I’he author has attempted t o obtain a substituted cyaiiguanidine by treating guanidine thiocyanate with various metallic oxides. T h e results were always negative, whether he treated the thiocyanate in alcoholic or iri aqueous solution, or whether he heated it hi sealed tubes. KO desulpliurizatiori took place. T h e oxides of mercury and lead, in a11 alcoholic solution, have but little actioii on the thiocyanate, except to produce a slight clecomposition into ammonia and carbonic acid. Oxide of mercury produces a precipitate in the aqueous solution, which the : ~ u t I ~ oregards r as a conipourid of mercuric thiocyanate with gnaiiidine thjocyailate and niercuric oxide, although it coulti riot be prepared i l l a pure condition. On boiling with acetic acitl, i i i wliich it is solnblc, it yields guanidine thiocyanate and CJ&O,I IgCh’8 ; on boiling with eoncentrated hydrochloric acid, the douhle salt, CS,H,,II(‘L iIIgC12, is obtained. W h e n t h e guanidine thiocyanate, however, is treated with metals or rnctallic oxides, when molten, a quite different reaction takes place, and a lnrtial desulphurizing is brought about. \Then, for instance, plunibic oxide or finely divided lead is added to melted guanidine thiocyanate, plumbic sulphide and a body, having the formula, CJ%,J,,O, which the aiitlior calls cyanmelamidine, are obtained. Hydrochloric or sulphuric a d , as well as potassium pernianganate, decomposes the substance into melamine, C,H,N,, nitric acid into arnmeline and hydrocyanic acid. MUHD
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OPLE’t?i7JLenec?~Llo?.osu~p?~o~~ur~i~e m i d f3 C?do?*et?~~L8uZp?i onic A c i d , WILLIAX JAMES(20, 35 l).-I
