430 PROCEEDINGS OF THE AMERICAN ACADEMY. 



0.3177 gram of the salt heated at 100° lost 0.0501 gram. 



Calculated for 

 C6Cl2(0CH3)202(CU3ONa).(CH30H)2. Found. 



Methyl Alcohol 15.64 15.77 



Another sample of the sodium salt was then dried at 100° to a 

 constant weight, and a sodium determination was made in the dry 

 substance. 



0.2422 gram of the salt gave 0.1018 gram of sodic sulphate. 



• Calculated for 



CeCUCOCHslAlCHaONajj. Found. 



Sodium 13.33 13.61 



These results show that, by the action of sodic methylate upon the 

 dichlordiphenoxyquinone in the first place the two phenoxy groups are 

 replaced by two methoxy groups, and then two molecules of sodic 

 metliylate are added directly to the molecule of dichlordimethoxy- 

 quinone formed by the first part of the action. The proof that these 

 two molecules of sodic methylate are attached to the carbonyl groups 

 of the quinone has been given in the introduction to this paper, and 

 the new substance therefore is dichlordimethoxyquinone dimethyl- 

 hemiacetal. 



Other Mdliods of Preparing the DicJdurdimetJioxyquinone 

 Dimethylh emiacetal. 



This body can be made also directly from chloranil by the action of 

 sodic methylate. When one equivalent of chloranil was treated with 

 five or six equivalents of sodic methylate dissolved in methyl alcohol, 

 a green salt containing sodium separated. This salt was dissolved in 

 water rendered alkaline by a little sodic hydrate, and the addition of 

 a dilute acid to this solution produced a dirty white precipitate, a 

 portion of which was soluble in alcohol, while the rest remained 

 undissolved. The insoluble part, after purification by dissolving in 

 sodic hydrate and filtering, was precipitated again with dilute sulphuric 

 acid, and washed with water and alcohol, after which it was dried in 

 a desiccator, and the chlorine determined : — 



0.2060 gram of the substance gave by the method of Carius 0.1962 

 gram of argentic chloride. 



Calculated for 

 CaCUCOCir.i i„0.,(CU30H)2. Found. 



Chlorine 23.59 23.55 



