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Reactions and characterisation of ethylenic hydrocarbons

Carry out the foUowing tests with the sample of amylene prepared in Section III,10 (compare Section III,6). [Pg.241]

Cool 1 ml. of amylene in ice and add 1 ml. of cold, dilute sulphuric acid (2 acid 1 water), and shake gently until the mixture is homogeneous. Dilute with 2 ml. of water if an upper layer of the alcohol does not separate immediately, introduce a little sodium chloride into the mixture in order to decrease the solubility of the alcohol. Observe the odour. The unsaturated hydrocarbon is thus largely reconverted into the alcohol from which it may be prepared. [Pg.241]

Finally, try to formulate the chemical reactions which occur in the above experiments and submit them to the instructor for comment. [Pg.241]

Characterisation of Unsaturatbd Aliphatic Hydrocarbons Unlike the saturated hydrocarbons, unsaturated aliphatic hydrocarbons are soluble in concentrated sulphuric acid and exhibit characteristic reactions with dilute potassium permanganate solution and with bromine. Nevertheless, no satisfactory derivatives have yet been developed for these hydrocarbons, and their characterisation must therefore be based upon a determination of their physical properties (boiling point, density and refractive index). The physical properties of a number of selected unsaturated hydrocarbons are collected in Table 111,11. [Pg.241]

The alicyclic secondary alcohol, cycZohexanol, may be dehydrated by concentrated sulphuric acid or by 85 per cent, phosphoric acid to cyciohexene. It has a higher boiling point (82-83°) than amylene and therefore possesses some advantage over the latter in.the study of the reactions of unsaturated hydrocarbons. [Pg.243]


See other pages where Reactions and characterisation of ethylenic hydrocarbons is mentioned: [Pg.241]    [Pg.241]    [Pg.1203]    [Pg.241]    [Pg.241]    [Pg.1203]    [Pg.241]    [Pg.241]    [Pg.241]    [Pg.1203]    [Pg.241]    [Pg.241]    [Pg.1203]    [Pg.241]    [Pg.227]    [Pg.744]    [Pg.277]    [Pg.383]   


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