66 DR. E. EEAJ^fKLAND’S RESEARCHES ON ORaANO-METALUC BODIES. 
VII. A nitrogen determination according to Bunsen’s method yielded the following 
results : — 
Pressure of mixed gases (dry) 
Pressure after absorption of CO 2 (dry) ... 65 ’0 13°‘7 
The atomic relation of carbonic acid to nitrogen is therefore as follows : — 
184-2 mm. 
65-0 
Temp. 
13°-7 C. 
C02:N=119-2; 65, 
or 
C02;N= 2 :l-09. 
VIII. 2-1023 grms., dried at 100° C. until the weight ceased to diminish, lost -0788 grm. 
water. 
These numbers correspond with the formula 
2 (N 2 C,H, 0,Zn)+HO, 
as is seen from the following comparison ; — 
Calculated. Pound. 
( 
> 
' II. 
III. 
IV. 
Y. 
VI. 
vn. 
Cs . 
48 
19-04 
18-83 
18-57 
H„. 
11 
4-36 
4-61 
4-76 
N4 . 
56 
22-22 
23-78 
Zn^. 
65-04 
25-81 
26-23 
25-46 
25-69 
0, . 
72 
28-57 
252-04 
100-00 
These results prove that the action of water upon dinitroethylate of zinc and zincethyl 
consists in the transformation of the zincethyl into oxide of zinc and hydride of ethyl, thus 
N,C.H.O.Z„+C.H 
IznO. 
The neutral dinitroethylate of zinc, however, thus set at liberty, immediately unites with 
a second equivalent of oxide of zinc, to form the basic salt Ng C 4 II 5 04 Zn+ZnO, which 
is decomposed by carbonic acid into carbonate of zinc and the neutral salt. 
Estimations Nos. I. and VIII. prove that dinitroethylate of zinc crystallizes with half 
an equivalent of water, which is expelled at 100° C., the loss in di-png being 3-98 per 
cent, and 3-75 per cent, respectively, whilst the theoretical number is 3-57. 
In order to estabhsh beyond doubt the nature of the transition fi-om dinitroethylate of 
zinc and zincethyl, to dinitroethylate of zinc, a known quantity of the former compomid 
was treated with water, and the amount of zinc separated by carbonic acid and of that left 
in solution, separately estimated. The following numbers were obtained: — -5654 grm. 
dinitroethylate of zinc and zincethyl gave, when treated with carbonic acid, a quantity of 
carbonate, which yielded on ignition -1204 grm. oxide of zinc. The filtrate precipitated 
by carbonate of soda gave -1148 grm. oxide of zinc. These numbers are equivalent to 
