JACKSON AND GRINDLh:Y. ACETALS FROM QUINONES. 443 



form of a varuish. It melts at 164°, aud is very soluble in alcohol, 

 mnch more so tliau the oxide from which it was obtaiued ; easily 

 soluble ill acetone, or glacial acetic acid ; sparingly soluble in ether, 

 benzol, or chloroform ; insoluble in carbonic disulphide, or water. It 

 shows weak acid properties, since it dissolves in a solution of sodic 

 hydrate, and is reprecipitated by an acid. Aniline acts upon it, but 

 we liave not yet studied the products. Alcohol seems to be the best 

 solvent for it. The study of this substance will be continued in this 

 Laboratory next year, and we hope the results of this work will not 

 only definitely establish its formula, but also throw much light on the 

 constitution of the body we have called the oxide of dichlordiethoxy- 

 h}droquinone dibenzoate, from which it was obtained. 



Dibenzoate of Dichlordiethoxyhydroquinone, 



CeCl2(OC2H5)2(OCOCeH5)2. 



This substance, which was made in order to compare it with the 

 oxide of dichlordiethoxyhydroquinone dibenzoate just described was 

 prepared as follows. The sodium salt of the substituted hydro- 

 quinone was treated with a slight excess of benzoyl chloride, and the 

 product boiled with water to decompose the benzoyl chloride which 

 had not entered into the reaction. After filtering hot the residue was 

 recrystallized from a mixture of alcohol and chloroform until it 

 showed the constant melting point 215°, when it was dried at 100°, 

 and analyzed with the following result : — 



0.2000 gram of the substance gave by the method of Carius 0.1202 

 gram of argentic chloride. 



Calculated for 

 C6Cl2(002H-,),,( 0C0CbH5)2. Found. 



Chlorine 14.95 14.86 



Properties of the Dibenzoate of Dichlordiethoxyhydroquinone. — It 

 crystallizes from a mixture of alcohol and chloroform in long white 

 prisms terminated by two planes meeting at an obtuse angle ; these 

 prisms show a tendency to unite longitudinally. It melts at 215°, 

 and is easily soluble in chloroform ; soluble in boiling benzol ; 

 sparingly soluble in alcohol even when hot, or in glacial acetic acid ; 

 insoluble in ether, carbonic disulphide, ligroine, or water. The dilute 

 acids do not act on it even when boiling, nor does strong hydrochloric 

 acid or strong nitric acid produce any visible effect ; strong sulphu- 

 ric acid also does not act on it in the cold, but when hot dissolves it, 

 forming a slightly dark-colored solution. Alkalies even in strong 

 boiling solution do not de'-ompose it. 



