Chemistry. 131 



in a sealed tube and allowing the mass to stand over night in a cooling 

 mixture. Ruby-red prisms are formed which melt at 66° C. and boil at 

 75° C. They are insoluble in water, but soluble in alcohol and ether and 

 have a penetrating smell. Wurtz assigns to this body the formula 



Treated with metallic mercury these crystals yield bromid of mercury 

 and a colorlesss liquid which has a faint but agreeable smell, solidifies 

 after fusion at -j-9° C and boils at 102° C. The formula of this liquid is 



C4H4O2 [ 

 and the author considers it as the ether of diethylene alcohol; its deri- 

 Tation from this last may be represented by the equation 

 C4H4 j 



C:H:J0,-2H0=g^^^^^j 



Dyoxyethylene is soluble in all proportions in water, alcohol and ether, 

 wd combines with difficulty with anhydrous acetic acid. 



When an aqueous solution of oxyd of ethylene is treated with an amal- 

 gam of sodium ordinary alcohol is formed, the equation being 



. Eqiial volumes of vapor of oxyd of ethylene and chlorhydric acid unite 

 instantaneously and form chlorhvdrate of oxyd of ethylene or glycol- 

 monochlorhydVin.— Com;j«e» Bendus, liv, 277. w. g. 



5. On, new modes 0/ forming certain hydrocarbons.— Wvutz has studied 

 tiie action of zinc-ethyl upon iodid of allyl, and has obtained in this 

 Planner hydruret of arayl, amvlene, allylene and ethylene. The forma- 

 tion of amylene may be represented by the equation 



The other substances are produced by the reaction indicated by the 

 equation ^ 



(C,H3),Zn,+2Cenj=ZnJ,4-C,oHx2+C6H4+C,H, 

 Other hydrocarbons with a higher boiling point are also formed : one 

 Of these appears to be dvamylene, G,,E,,.-Compfes Bendus, hv, 387. 

 6- On Hyperchloric ictrf.— Roscoe has carefully studied the hydrates 

 ""^ ; "ticipal salts of hyperchloric acid. The acid may be advantageously 

 -i by decomposing chlorate of potash with fluos.licic acid, distilling 

 "c acid and puriO^ing the distillate by means of the hyperchlorates 

 '• and of barium. Pure concentrated solution of hyperchloric acid 

 'orless heavy oily liquid which strongly resembles concentrated sul- 

 furic acid. When this acid is distilled with four times its volume of 

 ^^ncentrated sulphuric acid, a decomposition takes place at 110 ^•. dense 

 *t"te vapors pass off while a yellow insoluble liquid condenses : at 200 

 £o.ly drops fass over and condense to a crystalline mass. The hqu.d is 

 ['-•perchloric acid CIO, K; the crystals are the hydrate discovered by 

 ^is CIO3H4-2HO. Pure hvperchloric acid, CIO3H, is a colorless 

 ' ^f density 1-782 at 15° C. : 'L vapor is transparent and color ess but 

 'S thick white fumes in the air by attracting water. ^^ hen dropped 



