436 



SCIENCE PROGRESS 



TABLE II 



Per cent. HC1, 

 which readily 

 extracts the 

 substance 

 from ethereal 

 solution 



Crystallisation 

 from ether 



Colourofether- 

 eal solution 



Colour of solu- 

 tion in HC1 



Solubility in 

 ether 



Solubility in 

 cold alcohol 



Phytorho- 

 din 



6-5 



Needles in 

 tufts 



Carmine- 

 red 



Bluish-green 

 weakly 

 fluorescent 



Fairly solu- 

 ble 



Fairly solu- 

 ble 



Phytorho- 



ilin 



Tables, 

 rhombic 



Purple-red 



Bluish-violet 

 fluorescent 



Fairly solu- 

 ble 



Soluble 

 with diffi- 

 culty 



Ethyl ester 

 of Phyto- 

 rhodin 

 a. 



9'5 



Ethvl ester 



of Phyto- 



rhodin 



b. 



II 



Phytorho- 

 din 



Prisms 



Carmine- 

 red 



Greenish- 

 violet 

 weakly 

 fluorescent 



Very easily 

 soluble 



Easily 

 soluble 



Tables 



Purple-red 



Bluish- 

 violet 

 fluorescent 



Easily 

 soluble 



Soluble 

 with diffi- 

 culty 



Phytorho- 

 din 



/• 



II 



Needles in 

 tufts 



Purple-red 



Violet 

 greenish- 

 blue 

 nuance 

 weakly 

 fluorescent 



Fairly 

 soluble 



Soluble 

 with diffi- 

 culty 



Prisms in 

 rosettes 



Deep red 



Green. Not 

 fluorescent 



Very slight- 

 ly soluble 



Dissolves 

 with some 

 difficulty 



None of the products of either the phytochlorin or of the 

 phytorhodin series could be identified with certainty with the 

 derivatives described by Schunck and Marchlewski. Phyto- 

 chlorins a and b are very similar to phyllotaonin ; and some of 

 the phytorhodins are similar to phylloporphyrin ; the phyto- 

 rhodin esters are similar in many respects to the phyllotaonin 

 esters. The probability exists that the methods employed by 

 Schunck and Marchlewski, depending as they did on repeated 

 recrystallisation only, were insufficient to effect complete se- 

 paration of the mixtures. The chief products of Willstatter 

 approximately correspond in their analyses with the following 

 formulae : 



Phytochlorin a . . C28H33O5N3. 



Phytochlorin b 

 Phytochlorin c 

 Phytochlorin d 

 Phytorhodin a 

 Phytorhodin b 

 Ethyl ester of Phytorhodin a 

 Ethyl ester of Phytorhodin b 



CtfHssOsN,. 



C2sfl33C'6iN3' 

 C28il 35 U6lN3. 



C 28 H 35 6 N 3 . 



^28^1 33^41^3. 



C 30 H 37 O 5 N 3 . 

 C 30 H 37 O4N s . 



Some of these products appear to be stereoisomers. 



