305 



Zincethyl is acted upon with great energy by iodine ; when the 

 violence of the reaction is moderated, by the application of intense 

 cold and the intervention of ether, the sole products are iodide of 

 zinc and iodide of ethyl 



C 4 H 5 Znl fC 4 H 6 I 

 1,1 J I Znl. 



Bromine acts with explosive violence on zincethyl, but the action 

 may be moderated by adding the bromine in the form of diffused 

 vapour and cooling to C. The sole products of the reaction are 

 then bromide of ethyl and bromide of zinc 



C 4 H.Zn1 fC 4 H,Br 

 Br.BrJ I ZnBr. 



Zincethyl burns with a lurid flame spontaneously in chlorine gas ; 

 the zinc and hydrogen are converted into chlorides, whilst carbon is 

 deposited in the form of soot. I have not studied the products of a 

 more moderate action, as it is difficult to bring the materials toge- 

 ther without too great an elevation of temperature. There can be 

 no doubt, however, that the moderated action of chlorine would be 

 analogous to that of bromine or iodine, and that the products would 

 be chloride of ethyl and chloride of zinc 



C 4 H 5 Znl fC 4 H 5 Cl 

 Cl, Cl J I Zn Cl. 



Carefully dried flowers of sulphur have only a slight action upon 

 an ethereal solution of zincethyl, but the application of a gentle 

 heat suffices to produce a brisk reaction ; the sulphur gradually dis- 

 appears, a white flocculent precipitate is formed, and a strong odour 

 of sulphide of ethyl developed. The chief product of this reaction 

 is the double sulphide of ethyl and zinc (mercaptide of zinc), which 

 is produced as follows : 



A little free sulphide of ethyl is also formed 



C 4 H 5 Zn1 fC 4 H 5 S 

 S,S J"l ZnS. 



