DE. E. FEAJfKLAJTO’S EESEAECHES ON OEOANO-METALLIC BODIES. 
67 
21‘30 per cent, of oxide of zinc precipitated by carbonic acid, and 20’35 per cent, oxide 
of zinc left in solution ; numbers which nearly approach to equality, and do not differ 
from the theoretical amount in each case (22’14) more widely than might be expected 
when it is stated that the dinitroethylate of zinc and zincethyl used, had become partially 
oxidized before being weighed. 
Dinitroethylate of zinc is also produced by the direct oxidation of dinitroethylate of 
zinc and zincethyl in a stream of dry air, ethylate of zinc being at the same time formed ; 
the completion of the oxidation is known by the product ceasing to effervesce in contact 
with water. This reaction is expressed by the following equation : — 
N, a H, O, Zn+Q H 3 Zn-l ^ rN, C, H, O, Zn 
Oj IZnO, C.H^O. 
When this product is treated with water, alcohol and bibasic dinitroethylate of zinc are 
produced, 
N, C, H, O, Znl _ rN^ C, O, Zn+ZnO 
ZnO, C, H 3 O j IC, H, O, HO. 
One of the equivalents of base being removed by carbonic acid, the filtered solution 
of the neutral salt thus obtained was evaporated to crystallization, and the crystals 
heated to 100 ° for some time ; at this temperature they fused and afterwards solidified in 
coohng to a gummy mass, which is the anhydrous dinitroethylate of zinc, as is seen from 
the following analyses : — 
I. -3964 grm., burnt with oxide of copper and oxygen, gave ’2880 grm. carbonic acid 
and T540grm. water. 
II. •0835 grm. gave '0610 grm. carbonic acid and *0338 grm. water. 
III. '2885 grm., treated with nitric acid and afterwards ignited, gave ‘0988 grm. oxide 
of zinc. 
IV. •3501 grm., similarly treated, gave ’1182 grm. oxide of zinc. 
These numbers agree sufficiently with those calculated from the formula of anhydrous 
dinitroethylate of zinc, 
N.C.Hj O, Zn. 
Calculated. 
Found. 
{ 
I. 
II. III. 
s 
IV. 
a . 
. . 24 
19-75 
19-81 
19-92 
H, . 
. . 5 
4-11 
4-32 
4-50 
N, . 
. . 28 
23-04 
Zn . . 
. . 32-52 
26-76 
27-49 
27-10 
0, . . 
, . 32 
26-34 
121-52 
100-00 
Finally, dinitroethylate of zinc and zincethyl is produced by adding an ethereal solu- 
tion of zincethyl to anhydrous dinitroethylate of zinc, and corresponding compounds 
