ELISHA MITCHELL SCIENTIFIC SOCIETY. 6l 



The reaction soon set in. The mixture was allowed to stand over 

 night, the ether was distilled o£f on a waterbath and then the pro- 

 duct of the reaction driven over by a gentle heat. The product ob- 

 tained in this way gave on fractionating a colorless oil with a sweet 

 taste and smell and the boiling point 261-263" (uneorr:). This re- 

 mained liquid at O^C. Above 266° a yellow oil distilled over which 

 agreed with Lincke's description of Dioctyl. There was also a small 

 amount of oil boiling by 315°. The yield of octylbenzol amounted 

 to 15 g. 



Analysis. — o.i440g. of the substance gave on combustion with coi)pcr 

 oxide 0.4653 g. Coo, equivalent to 0.1269 g. Carbon, and 

 0.1579 g. H'O' equivalent to 0.01754 g. Hydrogen. 



Calculated for CyHi^.CgHj Found . 



C 88.04 88.12 



H 11.96 12.18 



Determinalion of specific gravity: 



Wt. of pyknometer = 0.8187 g- 1 wt. pyk. -|- octylbenzol = i.5iiog. ; 

 wt. pyk. -|- water = 1.6340 g. Hence sp. gr. octylbenzol = 0.849 

 (water at 15 ). 



To detect the benzol group in this body I boiled for several days 

 1 g. octylbenzol with potassium bichromate and sulphuric acid, 

 using a flask and inverted cooler. The hydrocarbon was attacked 

 with great difficulty. The product of the reaction exhausted with 

 ether yielded an acid which gave, after repeated sublimation the 

 melting point of Benzoic acid (120"). It was present however only 

 in small amount. 



Preparation of OGtylmonohromhenzol. — 2 g. octylbenzol were 

 shaken with the calculated amount of strong bromine water and 

 warmed a short time over the water bath. The mixture was then 

 washed with alcoholic potash and poured into water. Thereupon 

 a heavy liquid separated which yielded on fractionating a clear yel- 

 low oil boiling between 285° — 290''. This is easily soluble in ether 

 and does not solidify at . 



In determining bromine 0.1584 g. of the substance yielded 0.1098 

 g. silver bromide, equivalent to 0.046719 g. bromine; calculated for 

 C.Hi^.CgH^. Br. sp., p. c. Br. = 29.70, found p. c. Br. = 29.43. 



Preparation of octylbenzol sulphonic acid. —2^ octylbenzol were 

 shaken with fuming sulphuric acid and the product poured into 

 water. On treatment with lead carbonate the lead salt of the acid 



