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Soda-lime, heating substances with

In a limited number of substances containing nitrogen, the presence of the latter may be proved by heating the substance with an excess of pulverised soda-lime in a test-tube with a Bunsen flame this causes decomposition with evolution of ammonia, which is detected by its odour or by means of a black colour imparted to a piece of filter-paper moistened with a solution of mercurous nitrate. Nitro-compounds, eg., do not give this reaction. [Pg.73]

Th. Wertheim and F. Rochleder found that on heating the alkaloid piperine (see p. 243) with soda-lime a volatile base (piperidine) is formed, but they mistook it for aniline Wertheim later thought it was picoline, but Anderson and Cahours showed that it is a peculiar substance, and Cahours found its correct formula CgNHu. Von Babo and E. Keller showed that piperine on boiling with alcoholic potash forms piperidine and piperic acid, C12H10O4. By fusing piperic acid with caustic potash Strecker discovered... [Pg.767]

See other pages where Soda-lime, heating substances with is mentioned: [Pg.2]    [Pg.329]    [Pg.467]    [Pg.1038]    [Pg.1044]    [Pg.486]    [Pg.486]    [Pg.505]    [Pg.331]    [Pg.1038]    [Pg.1044]    [Pg.93]    [Pg.245]    [Pg.1038]    [Pg.1044]    [Pg.42]    [Pg.105]    [Pg.189]    [Pg.281]    [Pg.635]    [Pg.447]    [Pg.451]    [Pg.456]    [Pg.108]    [Pg.124]    [Pg.124]    [Pg.1205]    [Pg.1205]    [Pg.88]    [Pg.101]    [Pg.554]    [Pg.1038]    [Pg.1044]    [Pg.659]    [Pg.1038]    [Pg.1044]    [Pg.375]    [Pg.239]    [Pg.552]    [Pg.255]    [Pg.255]    [Pg.677]    [Pg.646]    [Pg.206]    [Pg.581]    [Pg.645]    [Pg.697]    [Pg.907]   
See also in sourсe #XX -- [ Pg.4 , Pg.6 , Pg.327 ]



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