On a New Series of Organic Bodies containing Metals. 159 



reference to this pointy and to certain unsuccessful experiments 

 of the nature just described, additional information is contained 

 in the memoir. If a sufficiently delicate torsion- balance of per- 

 fectly constant vibration-time could be constructed, the solution 

 of the problem, in the way last mentioned, would not be without 

 interest. 



Finally, I have made use of the torsion-balance in diamag- 

 netic experiments. As these, however, have been already par- 

 tially published, and, as regards the different repulsion of rock 

 crystal and calcareous spar in the direction of the axis and per- 

 pendicular to the latter, have been more successfully executed 

 by Tyndall*, I refrain from mentioning them further here. 



XXVI. On a New Series of Organic Bodies containing Metals. 

 By Dr. E. Frankland, F.C.S., Professor of Chemistry, Owen's 

 College, Manchester' •\. 



UNDER the above title 1 described, more than three years 

 ago, some preliminary experiments % which proved the 

 existence of certain organic compounds highly analogous to 

 cacodyle, and, like that body, consisting of a metal, or in some 

 cases phosphorus, associated with the groups C^ H^, C^ H^, 

 C^ H^, &c., and possessing in most instances, highly remarkable 

 powers of combination. I fixed the composition and studied 

 some of the reactions of two of these bodies, to which the names 

 Zincmethyle (C^H^Zn) and Zincsethyle (C^H^Zn) were pro- 

 visionally assigned, besides giving methods for procuring similar 

 compounds containing tin, arsenic and phosphorus, by acting 

 upon the iodides of the alcohol radicals with these elements, and 

 expressing a belief, founded upon the similarity of functions 

 existing between hydrogen and the groups of the form C° H^°+^^, 

 that most, if not the whole, of the compounds contained in the 

 following series might be formed ; those marked thus * being at 

 that time already known. 



Hydrogen 

 series. 



ZnH 



AsH2* 

 Sb IP* 



P 113* 



Methyle 

 series. 



Zn C2 H3* 



As(C2H3)2* 

 Sb(C2H^)3 



P (C2H3)3* 



JEthyle 

 series. 



Zn C-* H5* 



As(C4HS)2 

 Sb(CiH5)3 



P (C4H5)3 



Butyle 



series. 



Zn C6 W 



Sb(C6H7)3 



P (C6H7)3 



Valyle Amyle 



series. i series. 



Zn C8 H9, 



As(C8 H9)2 

 Sb(C8 H9)3 



P (C8H9)3 



Zn Ci" H" 



As(CiOHii)2 

 Sb(CiOHii)3 

 P (CiOHii)-"^ 



Phenyle 



series. 



Zn C12 H5 



As(Ci2 ivy 

 Sb(C'2H5)3 



P (C12H5)3 



* Poggendorff's Annalen, vol. Ixxxiii. p. 384. Phil. Mag. Sept. 1851. 



t From the Philosophical Transactions for 1852, part ii. ; having been 

 received by the Royal Society May 10, and read June 17, 1852. 



X Annalen der Chemie und Pharmacie, vol. Ixxi. p. 213, and Journal of the 

 Chemical Society, vol. ii. p. 297. 



