306 Dr. T. E. Thorpe's Contributions to the 



I. II. III. 



CI CI CI 



I I I 



©-0-C1 (v)-o-ci ©—o 



c! ®-°- cl ®-i> 



vy-o-ci ci 



CI 

 2V0C1 3 V 2 2 C1 4 V 2 2 C1 2 



And just as the V 2 2 C1 4 is formed by the juxtaposition of 

 two molecules of VO CI 3 minus two atoms of chlorine, so in like 

 manner the V 4 O 4 CI 2 may be represented as derived from two 

 molecules of V 2 O 2 CI 2 minus two atoms of chlorine : thus, 



CI 



1 



CI 



®-0 



1 



®-o 



1 



1 



1 1 

 (v — 



CI 



I 



CI 



1 



©— 



1 1 



®-0 



J 1 



®— 



®-0 



1 



1 

 CI 



1 



CI 





2V*0 2 C1 2 



V 4 4 C1 2 



So far as I am aware, there is nothing to disprove such a me- 

 thod of representation; it has at least the merit of preserving 

 the triatomic nature of vanadium in these compounds, and shows 

 in a simple manner their relation to the vanadyl trichloride. 



Assuming, then, that the triatomic nature of vanadium is 

 established, analogy points to the existence of other oxychlorides 

 among the trivalent group than those at present known to us. 

 To fulfil the relationship, we ought to have TO CI 3 , T 2 O 2 CI 4 , 

 T 2 2 ,C1 2 and T 4 4 C1 2 , where T represents a member of the 

 triatomic group of elements. The following Table represents 

 these analogies so far as they are complete : — 



