440 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Saponification of Dichlordiethoxyquinone Dibenzoyldiethylacetal. 



This substance was boiled with sulphuric acid of specific gravity 

 1.44 for half an hour in a tiask with a return condenser ; a certain 

 amount of gas was given off, and the solid finally went into solution 

 completely, but upon cooling crystals were deposited, the amount of 

 which was increased by diluting the acid with water. This crystal- 

 line precipitate was filtered out, washed repeatedly with water to 

 remove a little chloranilic acid which had been formed in tlie process, 

 and the residue recrystallized from alcohol until it showed the constant 

 melting point 142°, when it was dried for analysis. The analysis of 

 this substance gave a great deal of trouble ; by using a boat and a 

 stream of oxygen according to the usual method we were unable to 

 secure <;omplete combustion, and therefore were forced to mix the 

 compound with cupric oxide, and carry on the combustion in an old- 

 fashioned closed tube. This accounts for the fact that our jjercent- 

 ages of hydrogen are somewhat high. 



I. 0.2119 gram of the substance gave on combustion 0.4558 gram 

 of carbonic dioxide and 0.0845 gram of water. 

 II, 0,20G2 gram gave 0.4452 gram of carbonic dioxide and 0.08G9 

 gram of water. 

 III. 0.2020 gram gave 0.4344 gram of carbonic dioxide and 0.0830 



gram of water. 

 IV. 0.2063 gram gave 0.4451 gram of carbonic dioxide and 0.0837 

 gram of water. 

 V. 0.1947 gram of the substance gave by the method of Carius 

 0.1136 gram of argentic chloride. 

 VI. 0.2212 gram gave 0.1290 gram of argentic chloride. 



Calculated for Fouud. 



CeCl,(OC,Il5).(OCOC6H5)20. • I. II. III. IV V. VI. 



Carbon 58.65 58.66 58.88 58.64 58.84 



Hydrocren 4.07 4.43 4.67 4.56 4.51 



Chlorine 14.46 14.42 14.41 



The formula calculated from these analytical results is so strange, 

 that we were at first unwilling to accept it, and thought that perhaps 

 we had the dibenzoate of dichlordiethoxyhydroquinone in our hands, 

 the calculated percentages of hydrogen and chlorine for which agree 

 fairly well with those found by us, whereas the calculated percentage 

 of carbon is over two per cent higher. This difference we thought 

 might be due to an obstinate impurity, and accordingly we prepared 



