320 PROCEEDINGS OP THE AMERICAN ACADEMY 



action proved to be a viscous, sticky liquid, wliich showed no signs of 

 crystallization after long standing over sulphuric acid in vacuo, and 

 which could not be volatilized, even in vacuo, without decomposition. 

 The substance dried over sulphuric acid in vacuo for several days gave 

 somewhat too low a percentage of bromine. 



0. 3653 grm. substance gave 0.3031 grm. AgBr. 



Calculated for C4HBr04(CH3)2. Found. 



Br 35.88 35.30 



Diethyl Mucoxyhroynate, C4HBrO^(C2H^)2. — This substance we 

 attempted to prepare by the action of ethyl iodide diluted with dry 

 ether upon the silver salt. We obtained a thick viscous product, 

 which we were unable to purify, and which, after long standing over 

 sulphuric acid in vacuo, proved to contain iodine, and gave too high 

 a percentage of halogen. 



I. 0.2288 grm. substance gave 0.1911 grm. AgBr. 

 II. 0.2328 grm. substance gave 0.1920 grm. AgBr. 



Br 



The ether was decomposed by an excess of baric hydrate, the excess 

 of baric hydrate precipitated by carbonic dioxide, and alcohol added 

 to the filtered solution. We obtained in this way a crystalline salt, 

 which possessed all the properties of baric mucoxybromate. 



0.5875 grm. of the air-dried salt gave 0.3720 grm. BaS04. 



Calculated for BaCiHBrO^ . 2 H3O. Found. 



Ba 37.43 37.23 



Monoethyl Mucoxylr ornate, C^^V>\'0^ . CjH^. — If ordinary ether is 

 used instead of anhydrous ether in the preparation of the ethyl ether, 

 the acid ether is obtained. We added the dry silver salt slowly to an 

 excess of ethyl iodide, and, after the first reaction was over, warmed 

 for a short time on the water-bath. The product was then extracted 

 with ordinary ether, and the etheral extract allowed to evaporate 

 spontaneously. The syrupy residue thus obtained gradually yielded 

 an abundance of clear prisms, with oblique truncations, which were 

 pressed out, and recrystallized from boiling benzol. 



0.2068 grm. of substance dried over HgSO^ gave 0.1762 grm. AgBr. 



Calculated for CjHoBrOi . C2II5. Found. 



Br 35.88 36.25 



