On Kreatinins. 



509 



Thus 0*4960 gram of Pfc salt, crystallised from aqueous solution 

 and air-dried, lost 0*0260 gram at 100° C, equivalent to 5-24 per 

 cent. 



5*1396 grams of Pt salt, prepared as above, lost 0*2706 gram at 



100° C, corresponding with 5*27 per cent. 

 0*8332 gram of Pt salt, re-crystallised from aqueous solution and 



air-dried, lost 0*0454 gram at 100° C, corresponding with 5*44 



per cent. 



The anhydrous platinum salt of the reducing base was submitted to 

 analysis with the following results : — 



0*4866 gram of platinum salt gave 0*1188 gram of water, equivalent 

 to 0*0132 gram of hydrogen, or 2*71 per cent, of H, and 



0'2680 gram of C0. 2 , equivalent to 0*0736 gram of carbon, or 

 15*12 per cent, carbon, and left 



0*1514 gram of platinum, corresponding with 31*11 per cent. 

 ofPt. 



0*4172 gram of Pt salt gave 0*1060 gram of water, equivalent to 

 0*01177 gram of hydrogen, or 2*82 per cent., and 



0*2336 gram of C0 2 , equivalent to 0*06371 gram of carbon, or 15*27 

 per cent, of C. 



The chlorine was determined by mixing the platinum salt with pure 

 caustic lime, igniting, dissolving in diluted nitric acid, filtering from 

 the spongy platinum (which is weighed), and precipitating the 

 chlorine in the filtrate as AgCl. 



0*5535 gram of Pt salt gave 0*7460 gram of AgCl, equivalent to 

 0*1845 gram of chlorine, corresponding with 33*333 per cent. CI, 

 and left 



0*1715 gram of platinum, corresponding with 30*984 per cent, 

 of Pfc. 



0*5430 gram of Pfc salt gave 58 c.c. of nitrogen, measured at 0° C. 

 and 760 mm., equivalent to 0*072 gram of nitrogen, or 13*25 per 

 cent. 



0*3060 gram of platinum salt gave 32*85 c.c. of nitrogen, measured 

 at 0° C. and 760 mm., equivalent to 0*04106 gram of nitrogen, or 

 13*41 per cent. 



These results agree well with the formula 2{ C 4 H 7 N 3 O.HCl}.PtCl 4 . 

 Kequired. Found. 



Carbon 15 047 .... 15*190 j 



Hydrogen. . . 2*507 .... 2*760 j 

 Nitrogen .... 13*166 .... 13*330 j 



1512 

 15*27 

 2*71 

 2*82 

 13*25 

 13*41 



