251 
matters, whereas the stronger acids got coloured considerably. The 
various fractions of the colouring matters obtained were next worked 
up in the same manner, viz. they were diluted with water and 
extracted with ether. The nonacid colouring matters dissolving in 
10 and 1272% hydrochloric acids crystallized very well from ether. 
The general properties of the substances obtained agree with those 
described byWillstätter for phytorhodines. Especially convin¬ 
cing for the supposed identity of the above transformation products of 
allophyllotaonine and the phytorhodines would be the identity of their 
absorption spectra. The phytorhodines have up to now not been stu¬ 
died in this respect, and in order to establish the supposed identity 
of both colouring matter groups definitely we have prepared the 
phytorhodines according to Willstatter’s prescriptions and com¬ 
pared them with our allophyllotaonine derivatives spectroscopically. 
The mixture of reddish brown colouring matters obtained from 
the calcium chloride precipitate 1 ) was first of all divided 
into substances soluble in weak sodiumhydrate solution and inso¬ 
luble in it. The former ones were taken up in ether and treated 
with a 2 1 / 2 °/ q , 5°/ 0 , 772%? 10% an d 12% hydrochloric acid. The 
two weaker acids dissolved considerable quantities of colouring 
matters, the stronger ones took up but a small amount. The colour 
of these solutions is green, with a bluish tint. By diluting the acids 
solutions with water and shaking up with ether these phytorhodines 
were obtained in the free state. The colour of the ethereal solution 
was cherry red. 
The absorption spectra of the colouring matters obtained from 
the 7725 10% and 12% fractions were quite identical in every 
respect. According to their intensity the five bands observed may 
be placed in the following order: 
IV > V > I > III > II. 
The 3 d band is a complex one, resembling a band of the phvllo- 
porphyrine spectrum. Its more refrangible part is almost as dark 
as band I. Very concentrated solutions show still a sixth band in 
the yellow part of the spectrum which may be designated as II a . 
The position of the bands caused by the colouring matter taken 
up by 7% or 10% hydrochloric acid and dissolved in ether is 
characterised by the following wave lengths: 
*) Liebigs Ann. 350. 1. 
