675 



dually added to a solution of zincmethyl in ether. Considerable heat 

 was evolved, and the vessel in which the reaction was performed 

 required to be plunged into cold water. On treating the product 

 as before described, a liquid was obtained boiling between 143 and 

 148 C., and yielding, on analysis, numbers closely corresponding 

 with the formula 



The action of zincmethyl upon iodide of stanethyl may therefore 

 be thus expressed : 



Sn 

 ZnC 2 H s 



The new body thus formed, and for which I propose the same 

 stannic ethylomethide y is a colourless limpid liquid, undistinguish- 

 able in appearance from stannic ethide. It possesses, like the latter, 

 a very faint ethereal odour and a slightly metallic taste. Its specific 

 gravity is 1-2319 at 19C. It does not solidify at 13C. 

 Stannic ethylomethide boils between 144 and 146 C. The specific 

 gravity of its vapour is 6*838, showing that its constitution is similar 

 to that of stannic ethide. It is easily inflammable, and exhibits the 

 same deportment as stannic ethide with chlorine, iodine, and bro- 

 mine; its combination with these elements being always attended 

 with the expulsion of methyl. Stannic ethylomethide dissolves 

 iodine, assuming a magnificent crimson colour, which disappears 

 with extreme slowness unless heat be applied. When, however, 

 action has once been set up, it goes on with considerable rapidity, 

 even in the cold. The products of this reaction were proved to be 

 iodide of methyl and iodide of distanethyl : 



C 4 H ; 

 31 H 



Iodide of distanethyl, which has already been partially examined, 

 although with discordant results, by M. Lowig and by MM. Ca- 

 hours and Riche, is a dark straw-coloured, somewhat oily liquid, 

 which does not solidify at 13C. It possesses an extremely pun- 

 gent and intolerable odour, resembling oil of mustard. Its specific 

 VOL. ix. 2 z 



