162 PROCEEDINGS OF THE AMERICAN ACADEMY. 



in the air, or in a desiccator. If exposed to the air for a long time, it turns 

 first reddish brown, then yellowish brown, and finally becomes an unin- 

 viting sticky mass. Owing to this slight stability we are unable to state 

 its melting point with certainty ; the highest melting point observed for 

 it was 77°-78°. It is very easily soluble in benzol, ether, ligroin, car- 

 bonic disulphide, or chloroform ; soluble in alcohol or acetone ; insoluble 

 in water. Alcohol is the best solvent for it. It dissolves in strong sul- 

 phuric acid, and this solution gives a precipitate, when diluted with 

 water. Cold sodic hydrate has no apparent action on it. 



Action of Phenylhydrazine on the Oxide C6Cl20CH30(OCOC6H5)oOCH3. 



When the oxide is warmed gently with phenylhydrazine a yellow sub- 

 stance is formed, which recalls the yellow intermediate body formed by the 

 action of isoamylamine on the oxide. Before we found that isoamylamine 

 led to definite compounds with comparative ease, we devoted a great 

 deal of time to the study of this phenylhydrazine product and its deriva- 

 tives, but with no results of sufficient certainty to be described, for, 

 although more stable than the yellow isoamylamine compound, this phenyl- 

 hydrazine derivative is not stable enough to give good results on analy- 

 sis. So far as our work has led to any formulas they are in harmony 

 with what we should expect from our study of the behavior of isoamyl- 

 amine. 



Hydroxylamine apparently does not act on the oxide. 



DichlordimetJioxyquinonedimethyldiacetylacetal^ 

 C6Cl2(OCH3)2(OCOCH3)i>(OCH3)„. 



This substance and the ethyl compound described in the next section 

 were prepared for the sake of comparison with the corresponding benzoyl 

 acetals. 



3.5 grams of the sodium salt of the dichlordimethoxyquinonedimethyl- 

 hemiacetal were suspended in acetone, and 2 grams of acetyl chloride 

 added with constant stirring. The action took place to some extent 

 even in the cold, but to complete it the mixture was heated on the 

 steam bath for a short time, until most of the acetone had passed off. 

 The product thus obtained was crystalline, and somewhat colored 

 by chloranilic acid and dichlordimethoxyquinone. It was purified by 

 washing with alcohol, water, and dilute sodic hydrate, to remove sodic 

 chloride, chloranilic acid, and the red substituted quinone, and at last 

 by crystallization from a mixture of chloroform and alcohol, until it 



