18 



Dr. C. R. A. Wright's Contributions to the [Nov. 16, 



equivalent of HI being also added on ; moreover in some instances a number 

 of molecules of H 2 are likewise taken up, and are not separated from the 

 compounds ultimately formed even by some days' exposure to a tempera- 

 ture of 100°. 



On treating the compound C 63 H 30 N 4 O 10 , 4HI with about ten parts of 

 55 per cent, of hydriodic acid (a little piece of phosphorus being also added 

 to prevent separation of iodine from the HI by the heat) and heating to 

 boiling, a syrupy liquid is obtained, from which water precipitates (after fil- 

 tration from phosphorus) a tar resembling in all its physical characters the 

 compound C G3 H 3G I 2 N 4 12 , 4HI ; it contains, however, the elements of 

 HI+10H 2 O more tban this substance. The same substance apparently 

 is generated by treating the intermediate compound C 63 H S1 IN 4 12 , 4HI 

 with hydriodic acid in the same manner. 



(A) From the compound C 63 H 80 N 4 O 10 , 4HI, dried at 100° till 

 constant, 



0-3565 grm. gave 0*483 C0 2 and 0-158 H 2 0. 

 0-3835 grm. gave 0-2/8 Agl. 



(B) (A) dried twelve hours more at 100°, had turned a much darker 

 colour, probably indicating absorption of oxygen, — 



0-329 grm. gave 0-434 C0 2 and 0*155 H 2 O. 

 0-561 grm. gave 0*419 Agl. 



(C) From the compound C 63 H 31 IN 4 O 10 , 4HI, 

 0-377 grm. gave 0-485 C0 2 and 0-175 H 2 0. 

 0-387 grm. gave 0*2855 Agl. 











Found. 









Calculated. 





* 











N 





B. 



C. 



Mean. 





816 



36-69 



36*95 



35-98 



35-09 



36*01 





111 



4-98 



4*93 



5-24 



5*16 



5-11 



I 7 



889 



39-98 



39-16 



40-35 



39-87 



39*79 



N 4 



56 



2-52 











o 23 



352 



15-83 











C, i H 11I LN 1 11 ,4HI 



2224 



100 00 











Hence this body is formed by the equations 



C 03 H„ N 4 loS 4HI + 3HI+ 12H 2 O = C 03 H 107 1 3 N 4 22 , 4HI, 



C 63 H ai IN 4 O 105 4HI+2HI+ 12H 2 = C C3 H 107 1 3 N 4 22 , 4HI. 



On treating the compound C e3 H S3 N 4 O 10 , 4HI in the same way a pro- 

 duct is obtained only differing from the original substance by one equiva- 

 lent of HI; dried at 100°, 



0-3995 grm. gave 0*6800 C0 2 and 01 97 H n O. 

 0-3215 grm. gave 0-2200 Agl. 



