ORGANIC BODIES CONTAINING METALS. 
443 
the position of each of the five atoms, with which these elements respectively 
combine, be occupied indifferently by an electro-negative or an electro-positive 
element? This question, so important for the advance of our knowledge of the 
organic bases and their congeners, cannot now long remain unanswered. 
If the views which I have just ventured to suggest should be as well borne out 
by future researches as they are by the facts already known, they must occasion a 
profound change in the nomenclature of the extensive series of compounds affected 
by them : I have not, however, ventured to introduce this new system of nomencla- 
ture, even in the case of the new bodies described in this memoir, since hasty changes 
of this kind, unless absolutely necessary, are always to be deplored. In accordance 
with the suggested view of the constitution of the organo-metallic compounds, the 
following plan of nomenclature would probably be found most convenient. 
Arsenic Compounds. 
(Cg H3)2 As Bimethide of arsenic. 
(C2 H3)2AsO Bimethoxide of arsenic. 
(Cg HgjgAs O3 Bimetharsenic acid. 
(C2 H3)2As O3+KO . . . Bimetharseniate of potash. 
Zinc Compounds. 
(C2 H3)Zn Methide of zinc. 
(C4 HjjZn Ethide of zinc. 
(Cjo H4i)Zn Amylide of zinc. 
Tin Compounds. 
(C2 H3)Sn Methide of tin. 
(C2 H3)SnI Methiodide of tin. 
(C4 HjjSn Ethide of tin. 
(C4 HgjSnO Ethoxide of tin. 
(C4 HjjSnCI Ethochloride of tin. 
(C4 HjjSnOSOj .... Sulphate of ethoxide of tin. 
(^10 HjijSn Amylide of tin. 
(C40 Hj4)SnO Amyloxide of tin. 
Antimony Compounds. 
(C2 H3)3Sb Termethide of antimony. 
(C2 H3)4SbO Quadromethoxide of antimony. 
(C4 H5)3Sb Terethide of antimony. 
(C4 H5)3Sb O2 ’ Terethobinoxide of antimony. 
