also, e. g. in the case of the complex tri-oxalates of chromium and 

 rhodium 1 ); many other properties moreover, make such disym- 

 metrical compounds highly promising objects for research. 



If we examine more closely the atomistic arrangement of these 

 complex salts, as deduced from Werner's co-ordination-theory, it 



tm sm iioo 



5300 iHW 1SOQ StOO 370O SMO 5900 6000 frOO 6100 6300 6*100 6500 6600 



Fig. 163. 

 Rotation-dispersion of the optically active Tri-ethylenediamine Cobalti-salts. 



appears that these molecules are by no means unsymmetrical : for 

 instance, the tri-ethylenediamine-cobalti-comp\ex has the symmetry 

 represented in the accompanying figures, (fig. i6/f). It appears that 

 the stereometrical configuration has a ternary axis A z and three 

 heteropolar binary axes situated in a plane perpendicular to A 3 . 



l) F. M. Jaeger, Proceed. Kon. Akad. v. Wet. Amsterdam, Vol. 17. 1224. (1915). 

 19. (Aug.) (1917). 



