672 



II. " Remarks on Organo-Metallic Bodies ; 4th Memoir/' By 

 EDWARD FRANKLAND, Ph.D., F.R.S., Lecturer on Che- 

 mistry at St. Bartholomew's Hospital. 



(Abstract.) 



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 methyl, ethyl, and amyl. His attention 

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

 union of tin with ethyl, and to which the name stanethyl was given . 

 The iodide of stanethyl was prepared by exposing iodide of ethyl to 

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

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

 the same body, stanethyl itself (C 4 H 5 Sn) was obtained. 



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

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

 pounds were respectively represented as the analogues of the pro- 

 tiodide and biniodide of tin, thus 



Sn I Sn(C 4 H 5 ) 



Stannous iodide. Stannous ethide. 



Sn 

 

 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 ethyl, 

 or some other analogous organic group. In the Memoir already 

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

 stanethyl 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 stanethyl bears to stannous iodide. 



Sn 



v 



Stannic iodide. Stannic ethide. 



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



