284 



ing this autoraceinisatioii by experimenting in liquids containing 

 much acetone and by working very fast, gave any better results. 

 Analogous experience was gathered in the case of the brucine-saMs. 

 In the same way we prepared the tri-strychnine-ferri-oxnlate, 

 which, from analysis, was seen to have the composition : |i^(? (CjOjjj 

 Sti\-\-2 H^O, and here also several attempts were made to resolve 

 it into its antipodes. The result was always negative, and the same 

 occurred with : Diammonium-stryclinine-ferri-o.valate, diavimoniiun- 

 quinine-, diammoniuia-cinchonine- and diammonium-morphine-ferri- 

 oxalates. Only from the solution of the siri/c/mine-S'dh a green sub- 

 stance was obtained, which, however, did not show an activity 

 other than that corresponding to the amount of strychnine present. 

 The corresponding salts of hydroxylamine did not give a positive result 

 either. 



\ 3. In this paper only racemic salts of the type: 



\Fe{C,H,0,\\Me',-\-nU,ü, 



are described in which ^Je' is replaced successively by K, {JSIH^), 

 JSFa, Rb, Cs, and Tl. The i>a-salt could also be prepared, from 

 which other salts could be obtained by interchange with soluble 

 sulphates. The sodium-S3ih crystallises badly, and its description is 

 therefore omitted here. 



From warm solutions often pale gveen salts are obtained, possessing 

 rhombic symmetry, and containing ^ H^O, not 2 H^O as Scholz 'j 

 believed. The corresponding 7i-salt crystallises badly, and the results 

 obtained, although pointing in any case to a distinct isomorphism 

 with the other salts, have therefore not been separately given here. 



The most common /^T-salt, however, is a triclinic salt, crystallising 

 with 4:H^0. Of the Rb-sa\t we obtained, besides the rarely occurring 

 rhombic crystals (+ 1 H^O), also darkly coloured triclinic crystals, 

 containing only 1 HJ) too, but not well measurable. At least there 

 must, therefore, be three series of hydrates possible here: rhombic 

 and triclinic with i H^O, and triclinic ones with 4:11^0. But in no 

 case we met with the crystals imJicated by Scholz, containing 

 2H^0. A systematical investigation of the eventually possible hydrates, 

 is very desirable. 



The different salts can be prepared from concentrated solutions 

 of the alkali-malonates by adding the calculated amount of free 

 malonic acid, heating on the water-bath, and by finally adding 

 freshly precipitated and well-washed ferii-hydroxide prepared from 



1) A. Scholz, loco cit. p. 443. 445. 



