HYDROCARBONS. 31 



7. Normal Heptyl Hydride (Heptan), C 7 H 16 = CII 3 .CH 2 . 

 CH 2 .CH 2 .CH 2 .CH'.CH 3 . 



Is contained in the light oil of cannel coal-tar and 

 in large quantity in petroleum. Can be obtained from 

 these sources by partial distillation. Boiling point, 

 99 ; specific gravity, 0.699. 



Ethyl-amyl, C 7 H 16 =CH 3 .CH 2 .CH 2 .CH 2 .CH. j ^ 



By the decomposition of a mixture of ethyl and amyl 

 iodides (the latter from ordinary amyl alcohol) with 

 sodium. Boiling point, 90.5 ; specific gravity, 0.6819 

 at 17. 



Dimethyldiethylformene, C 7 H 16 = 

 C \ /^us'^TjV By the action of zinc ethyl on acetone- 



( UJ1 V/JLL . 



chloride. Boiling point, 86-87; specific gravity, 

 0.711 at 0. 



8. Normal Octyl Hydride ((Mm),C 8 H 18 = CII 3 .CH 2 .CIP. 

 CH 2 .CH 2 .CH 2 .CH 2 .CH 3 . 



The hydrocarbons obtained by the action of sodium 

 on butyl iodide, from methylhexyl carbinol by reduc- 

 tion, from sebasic acid and from octyl alcohol, all appear 

 to be normal octyl hydride. Boiling point, 123-125; 

 specific gravity at 17, 0.7032. 



In regard to the constitution of the remaining dis- 

 covered hydrocarbons nothing is as yet known. 



Boiling point. Specific Gravity. 



Nonyl hydride, C 9 H 20 . . 136-138 0.741 



Decatyl hydride, C 10 H 22 . . 158-162 0.757 



Undecyl hydride, C"H 24 . . 180-182 0.766 



Lauryl hydride, C ]2 H 26 . . 198-200 0.778 



Cocinyl hydride, C 13 H 28 . . 218-220 0.796 



Myristyl hydride, C 14 H 30 . . 236-240 0.809 



Benyl hydride, C^H 32 . . 258-262 0.825 



Palmityl hydride, C 16 H 34 . . 280 ? 



