abstracts: chemistry 335 



successively two molecules of ammonia to form the diammonated and 

 monoammonated salts of the respective formulas CUNK2.2NH3 and 

 CUNK2.NH3. E. C. F. 



CHEMISTRY. — Potassium ammonotitanate. Edward C. Franklin 

 and Thomas B. Hine. Journal of the American Chemical Society 

 36: 1497. 1912. 

 Treated with liquid ammonia titanium tetrabromide undergoes am- 

 monolysis and is converted into an ammonobasic titanium bromide of 

 the formula N = Ti - Br. When this basic salt, or nitride bromide, is 

 brought into contact with liquid ammonia solution of potassium amide 

 a reaction takes place which results in the formation of a compound 

 of the formula N = Ti-NHK which receives the name potassium ammono- 

 titanate. The two reactions are represented by the equations 



TiBr4 + 4NH3 = N = Ti - Br + 3NH4Br and 



N = Ti - Br + 2KNH2 = N = Ti - NHK + KBr. 



The results of this investigation show that just as titanium bromide 

 undergoes hydrolysis in contact with water and just as the product of 

 hydrolysis may be made to react with potassium hydroxide to form 

 potassium aquotitanate so similarly the bromide undergoes ammono- 

 lysis in contact with liquid ammonia and in presence of an excess of the 

 ammonobase, potassium amide, it is converted into a potassium ammo- 

 notitanate. E. C. F. 



CHEMISTRY. — The action of potassium amide on thallium nitrate in 

 liquid ammonia solutions. Edward C. Franklin. Hygienic Labo- 

 ratory. Journal of Physical Chemistry 16: 683. 1912. 

 The black precipitate of thallous nitride, formed by the interaction of 

 liquid ammonia solutions of potassium amide and thallium nitrate in ac- 

 cordance with the equation, TINO3 + 3KNH2 = TI3N + 3KNO3 + 2NH3, 

 dissolves in potassium amide solution to form potassium ammonothallite. 

 The salt thus formed separates from sufficiently concentrated solutions 

 in the form of beautiful yellow crystals of the composition represented 

 by the formula TINK2.4NH3. The reaction between thallium nitride 

 and potassium amide is strictly analogous to that which takes place 

 when zinc oxide, for example, dissolves in aqueous solution of potassium 

 hydroxide. Potassium aquozincate is formed in the latter case, potas- 

 sium ammonothallite in the former. The salt readily loses ammonia 

 to form successively the products represented respectively by the for- 

 mulas TINK2.2NH3 and TINK2.IJNH3. 



