ALLOTROPISM BASED ON THE THEORY OF DIRECTIVE VALENCY. 319 



I T 



H— ^C<— H Cl^ — C — >CI 



t i 



H CI 



Sir Wm. Ramsay iu his Presidential Address to the 

 Chemical Society 1908/ has further elaborated this 

 hypothesis and has suggested that electrons are atoms of 

 electricity and serve as the "bond of union" between atom 

 and atom. He explains the constitution and ionization 

 phenomena of complex inorganic salts, such as nitrites of 

 the cobaltammines by this hypothesis. 



This extremely interesting suggestion has been pursued 

 further by K. G. Falk and J. M. Nelson, 2 who have shown 

 that many cases of isomerism amongst carbon compounds 

 can be explained by this hypothesis as well as by spacial 

 configuration. They have shown that this method of repre- 

 senting the relation between the atoms can be applied to 

 carbon compounds with triple and double bonds, nitrogen 

 compounds with single and double bonds, and compounds 

 containing double bonds between unlike atoms. 



Falk 3 has further applied this hypothesis to the ionization 

 relations of organic acids. 



The object of the present communication is to attemp 

 to apply this hypothesis to an explanation of the structure 

 of allotropic forms of the elements. 



In the case of the isomers of organic and inorganic com- 

 pounds, the assumption of valency direction provides a 

 possible second explanation of such isomerism for which a 

 satisfactory explanation is already forthcoming in the 



1 J.C.S., Vol. 93, Trans, p. 774. 



2 K. G. Falk and J. M. Nelson, Journ. Amer. Chem. Soc, 32, 1637. 



3 K. G. Falk, Journ. Amer. Chem. Soc, 33, 1140. 



