TRANSACTIONS OF THE SECTIONS. 67 



Oil Sugar. By T. L. Patterson. 



Note on some new Anthracene Compownds. By W. H. Peekin, F.R.S. 



A very dilute solution of anthracene in carbon disulpliide, when cooled to (P C. 

 and treated with bromine, yields an addition product, a " dibromide of anthracene,"' 

 C,, H,(, Brj. It is a very unstable body, rapidly decomposing at the ordinary tem- 

 perature of the air, with evolution of hydro bromic acid ; when heated it also gives off 

 this acid, and is converted into monobromanthracene, C^^ H^ Br. 



If chlorine be ui=ed in place of bromine, a " dichloride of anthracene," C,, Hj^, Ol^, 

 is produced, which is even less stable than the corresponding dibromide ; when 

 heated it decomposes and yields monochloranthracene, C,^ Hg 01. 



On Picoline and its Derivatives*. By William Ramsay, Ph.D. 



The following salts of picoline were prepared : — 



The hydrochloride, deliquescent, melting at 160° 0. 



The hydrobrottiide, melting at 187°. These two salts may be crystallized from 

 impure picoline. 



The dibromide of picoline hydrohromide. — Prepared by treating the hydrobromide 

 with bromine. It forms golden-yellow scales, and melts at 85°. It is sparingly 

 soluble in water. 



The diiodide of picoline hydriodide. — Formed when picoline hydriodide is distilled. 

 Reddish-brown crystals, which melt when brought in contact with water ; soluble 

 in alcohol and in ether. Melting-point 79°. 



The formula of Anderson's trichloropicoline hydrochloride is disputed, both from 

 the results of analysis, from its method of preparation, and from its properties. It 

 appears to be a hypochlorite, and to contain the group (0 CI). The white powder 

 to which Anderson ascribes the formula Cg II4 CI3 N . IICl is a product of the action 

 of water on an oil obtained by projecting picoline into chlorine gas. 



Picoline dibromide, Cg H^ N . Brg, formed by the action of a solution of bromine 

 in chloroform on picoline, and 



Picoline iodochloride, Cg H, N . CI I, prepared in a similar manner, are crystalline 

 solids. The halogens, therefore, act on picoline to form at least four distinct sub- 

 stances : — 1, a direct addition compound containing picoline plus two atoms of halo- 

 gen ; 2, a substitution compound which undergoes alteration when brought in con- 

 tact with water ; 3, a salt of the halogen acid ; and 4, an addition-product con- 

 tainmg two atoms of the halogen combined with the haloid salt. 



The ferrocyanide forms white crystals. 



The platinocyanide consists of i«f ?e pale yellow rhomboids. It crystallizes with 

 4H,0 



The taHrate forms long white needles. 



The citrate is uncrystallizable. 



The phosphate is a white deliquescent crystalline mass. 



The chlorate forms very thin diamond-shaped crystals. 



The following compounds with alcohol radicals were prepared : — 



The methyl iodide, by mixing equivalent quantities of methyl iodide and pico- 

 line. Long white needles, which melt at 226°'5-li27°. 



The methyl chloride is an extremely deliquescent salt, and crystallizes from alcohol 

 in needles. 



The methyl nitrate forms large transparent prisms. 



The methyl hydrate, prepared by means of moist silver oxide, rapidly becomes 

 discoloured in the air, and when acted on, first with bromine, then with ammonia, 

 assumes a red colour. No methylaniine was evolved on boiling its aqueous solu- 

 tion. 



The diiodide of the methyl iodide, C^ IL N (CII3I) I^, crystallizes from alcohol in 



. ♦ r<VePhil. Mag. 187C, vol. ii.p. 209. 



