[ 222 ] 

 XXXV. Proceedings of Learned Societies. 



ROYAL SOCIETY. 



[Continueil from p. 152.J 



March 3, 1859. — Sir Benjamin C. Brodie, Bart., Pres., in the Chair. 



Tlie following communication was read : — 



" Remarks on Orgauo-Metallic Bodies ; 4th Memoir." By Edward 

 Frankland, Ph.D., F.R.S., Lecturer on Chemistry at St. Bartholo- 

 mew's Hospital. 



In a former Memoir* the author described the production of a 

 new series of organic compounds containing the metal tin in com- 

 bination with the radicals methyle, ethyle, and amyle. His attention 

 was at that time especially directed to the compound formed by the 

 union of tin with ethyle, and to which the name stanethyle was given. 

 The iodide of stanethyle was prepared by exposing iodide of ethyle to 

 light or heat in the presence of tinfoil ; and, by acting with zinc upon 

 the aqueous solution of this iodide of stanethyle or of the chloride of 

 the same body, stanethyle itself (Cj Hj Sn) was obtained. 



In accordance with a theory of the constitution of all organo- 

 metaUic bodies which the author then suggested, the above com- 

 pounds were respectively represented as the analogues of the prot- 

 iodide and biniodide of tin, thus — 



Sn I Sn(C,H,) 



Stannous iodide. Stannous ethide. 



C,H. 



Sn 



{l ^"{? 



Stannic iodide. Stannic ethiodide. 



It is evident that the application of this theory to the above 

 bodies would receive considerable additional support if the second 

 equivalent of iodine in the stannic iodide could be replaced by ethyle, 

 or some other analogous organic group. In the Memoir already 

 alluded to, it was mentioned, that in studying the behaviour of 

 stanethyle under the influence of heat, evidence was obtained of the 

 existence of this very compound, — stannic ethide, or binethide of 

 tin, as it was then named. This body obviously bears the same re- 

 lation to stannic iodide as stanethyle bears to stannous iodide. 



Sn{J SnjC.H. 



Stannic iodide. Stannic ethide. 



Although there could be little doubt of the formation of stannic 

 ethide by heating stanethyle to 150° C, yet the author could not suc- 

 ceed in obtaining the former body in a state of purity from this 

 source : it seemed probable, however, that stannic ethiodide would 

 be easily converted into stannic ethide by bringing it into contact 

 * Transactions of the Royal Society for 1852, p. 418. 



