CHEMISTRY: E. C FRANKLIN. 67 
amides of the strongly electropositive barium, strontium, and calcium, 
and on the amide of sodium, in order to determine whether potassium 
ammonobarate, ammonostrontiate, and ammonocalciate, and possibly 
even potassium ammonosodate, can be prepared. 
When a barium salt in solution in liquid ammonia is added to a solu- 
tion of potassium amide a microcrystalline precipitate is obtained which 
has been found to have the composition represented by the formula, 
BaNK.2NH3. 
When solutions of strontium and calcium salts in liquid ammonia 
are poured into an excess of a solution of potassium amide there are 
formed apparently noncrystalline products, which are represented 
respectively by the formulas, SrNK.2NH3 and CaNK.2NH3. The 
calciate was also prepared by the action of potassium amide on metallic 
calcium. 
When sodium amide is treated with a liquid-ammonia solution of 
potassium amide, or when a solution of a soluble salt of sodium is added 
to an excess of potassium amide in solution in liquid ammonia beautiful 
crystals of a product whose composition is represented by the formula 
NaNK2.2NH3, separate from the solution. 
For the reason that these compounds have been prepared by methods 
entirely similar to those whereby potassium ammonomagnesate and the 
other salts of the same class mentioned above are formed they have 
received the names given in the title of this paper and are formulated 
as salts with ammonia of crystallization. It is possible, however, to 
formulate them as molecular compounds of potassium amide with the 
respective amides of the less positive metals, as follows, 
Ba(NH2)2.KNH2, Sr(NH2)2.KNH2, Ca(NH2)2.2NH3, NaNH2.2NHK2; 
thus representing them as ammonia analogues of Werner's hydroxo 
salts. 
It is hoped that transference measurements which are to be under- 
taken in this laboratory may show for such of these compounds as are 
sufficiently soluble whether or not the less positive metal travels together 
with the nitrogen toward the anode during electrolysis. 
1 Fitzgerald, /. Amer. Chem. Soc, 29, 657; Franklin, Ibid., 29, 1274 (1907). 
2 Fitzgerald, /. Amer. Chem. Soc, 29, 1693 (1907). 
3 Franklin, /. Phys. Chem., 15, 509 (1911). 
4 Franklin, J. Amer. Chem.., Soc, 34, 1501 (1912). 
6 Franklin, /. Phys. Chem., 16, 682 (1912). 
« Franklin, /. Amer. Chem. Soc, 27, 835 (1905). 
' Franklin, /. Amer. Chem. Soc, 34, 1455 (1913). 
