THE PREPARATION OF CERTAIN FERRIOXALATES. 265 



strychnine and brucine salts, as was also the experience of 

 the authors of this communication. 



Cinclionine ferrioxalate was prepared by treating the 

 barium salt with (the calculated quantity of) sulphuric acid 

 in dilute solution, and adding the required amount of cin- 

 chone. On cooling, a yellowish-green gum separated which 

 later on set solid. The product so obtained dissolved only 

 to a small extent in boiling water, but crystallisation was 

 effected by slowly cooling such a solution, traces of alcohol 

 being added from time to time to prevent the separation 

 of oil. The salt is much more soluble in dilute alcohol than 

 in water. Obtained in this way it crystallises in pale green 

 needles, and can be recrystallised from aqueous alcohol. 



Pound: Fe4*24, 4*28. (0 19 H 22 ON 3 ) 3 H 3 [Pe(0 2 O 4 ) 3 ], 6 H 3 

 requires Fe = 4'27 per cent. 



The strychnine salt was prepared in a similar manner 

 and was obtained as pale green leaflets. 



Found: Fe 3*54, H 2 14*2 per cent. 

 <0 21 H 22 2 N 2 ) 3 H 3 [Fe(0 2 4 ) 3 ], 12 H 2 requires Fe 3*63, 

 H 2 14*1 per cent. 



The salt was recrystallised repeatedly from aqueous 

 alcohol. Its insolubility at room temperature rendered a 

 measurement of the optical rotation impossible. The last 

 fraction was therefore converted into the potassium salt 

 by treatment with potassium iodide, but was found on 

 examination to be optically inactive. 

 The University, Sydney. 



