DE. E. EEANKLAJTO’S EESEAECHES ON OEOANO-METALLIC BODIES. 407 
V. -5217 grm., heated with strong nitric acid, the solution evaporated to dryness and 
ignited, gave ‘2591 grm. binoxide of tin. 
These numbers closely correspond with those calculated from the formula of iodide of 
distanethyl — 
rQH, 
as is 
obvious from the following comparison ; — 
Calculated. 
A 
Bound. 
Ce. 
. . 48 
1 
15-87 
r 
I. 
16-02 
II. 
15-88 
III. IV. 
15-92 
H,o 
. . 10 
3-31 
3-37 
3-48 
3-43 
Sn, 
I . 
. . 117-64 
. . 126-84 
302-48 
38-89 
41-93 
100-00 
42-63 
V. Mean. 
15-94 
3-42 
39-03 39-03 
— 42-63 
101-02 
The foregoing numbers, taken in connexion with the production of iodide of methyl, 
prove that the action of iodine upon stannic ethylomethide converts two equivalents of 
the latter into one equivalent of iodide of distanethyl, with the separation of two 
equivalents of iodide of methyl : — 
2Sn 
r2C,H3l 
rc.H. 
1 SnJc.H^ 
It might have been expected that a stannic compound of the form 
Sn^^ 
C,H3 
i C 3 H 3 
I I 
would have been produced, differing empirically from iodide of distanethyl only by 
containing one additional equivalent of hydrogen ; but the formula of the former body 
requires 15-81 per cent, of carbon and 3-62 per cent, of hydrogen; and although these 
numbers are not altogether incompatible with the results of the above analyses, yet the 
fact of the production of iodide of methyl in the reaction is utterly irreconcileable with 
the formation of such a compound. Iodide of distanethyl has already been examined 
both by M. Lowio and by MM. Cahoues and Eiche ; but as the descriptions of these 
chemists are so little in harmony with each other, it is impossible to make use of them 
for the identification of the body obtained in the above reaction. It appears, however, 
to agree in properties with the iodide of distanethyl prepared by MM. Cahoues and 
Eiche. 
Iodide of distanethyl, produced by the action of iodine upon stannic ethylomethide, 
3 H 2 
