1895.] Contributions to the Chemistry of Chlorophyll. 3 Lr> 



0-1968 gram substance gave 197 c.c. of nitrogen at 23 and 745 mm. 

 pressure. 



II. 0*1744 grain substance gave 0*4478 gram C0 2 and O0974 gram 

 H 2 0. 



0*2293 gram substance gave 23'3 c.c. of nitrogen at 24 and 764 mm. 

 pressure. 



III. 0-2145 gram substance gave 0-5500 gram C0 2 aiidO'1242 gram 

 H 2 O. 



G'1072 gram substance gave 10*70 c.c. of nitrogen at 21 and 757 mm. 

 pressure. 



These numbers correspond in 100 parts to 



There are two formulae with which these numbers agree equally 

 well, viz., C 3 oH 3 4N i 4 and C 52 H 57 ]Sr 7 07, requiring respectively 



CaoF^NjO* C 52 H 57 N 7 7 . 



C 70-04 70-12 



H 6'61 6-39 



N 10-89 10-99 



12-46 12-50 



Since phyllotaonin, with the formula C4 H 40 N 6 6 , is formed by the 

 action of acids on alkachlorophyll, it was necessary to adopt for the 

 latter a formula with no less than 6 atoms of nitrogen. The second 

 of the above formulae meets this requirement. 



The formation of phyllotaonin from alkachlorophyll by the action 

 of acids, supposing the process to be one of simple hydrolysis, might 

 be represented by the following equation : , 



CTT "VT (~\ I TT /""\ ___ (~i TT ~VT f~\ I ^1 TT "VT/^i 

 52JJ-57J-' 7Vy 7 ~f~ JH 2 vy Vy 4 o-d 4 oi.i 6^6 I *-'12-'-M9-'-^ v-' 2 



That a small quantity of a product of a basic nature probably con- 

 taining nitrogen is formed along with phyllotaonin, by the. action of 

 acids on alkachlorophyll, has already been mentioned in the fourth 

 memoir of this series, but we have not been able to throw any more 

 light on the nature of this product. That some substance containing 

 nitrogen must be formed together with phyllotaonin in the decom- 

 position, is also indicated by the equation just given, but whether 

 the formula Ci 2 H 19 N0 2 represents one substance only, or a mixture of 

 several, is doubtful. 



The properties of alkachlorophyll have been already described, and 

 need not therefore be referred to here. The action of alkalis on it at 

 a high temperature may however be briefly described. 



VOL. LVII. 2 A 



