PRODUCED BY DISTILLATION OF CINCHONINE. 321 





I. 

 31-93 



II. 



III. 

 32-24 



IV. 

 32-52 



V. 





Calculation. 



Carbon, 



32-22 



C 18 108 



Hydrogen, 



3-09 





2-62 



2-58 



.. . 



2-39 



H 8 8 



Nitrogen, 





.. . 





. . . 





4-18 



N 14 



Chlorine, 









. . . 





31-77 



Cl 3 106-5 



Platinum, 



29-44 



29-60 



... 





29-40 



29-44 



Pt 98-7 



100-00 335-2 



Lepidine. — After repeated rectifications it was found that the fraction boiling 

 about 510° contained another base, to which I give the name of lepidine.* It was 

 only, however, when the rectifications had been very frequently repeated, that it 

 was obtained pure. My reason for giving a new name to the base containing 

 twenty equivalents of carbon, and retaining that of chinoline for the other was, 

 that C 18 H 7 N, is almost universally received as the formula of the latter. It has 

 been said that the positions of the bases in the fractions greatly alter as the 

 rectifications proceed. This is nowhere more strikingly illustrated than with 

 lepidine, which in the eighth rectification was met with as low down as 420° F. 

 (216° C). By fractional crystallization, without heat, a crop was obtained, which 

 yielded the annexed numbers : — 



f 5-905 grains of platinum salt gave 

 \ 1-685 ... platinum. 



Experiment. Theory. 



28-53 28-27 



But this salt formed only a small portion of the original fraction, for upon further 

 evaporation crystals were obtained, which the subjoined platinum determination 

 proved to consist of platinochloride of chinoline, — 



("6-345 grains of platinochloride of chinoline gave 

 \ 1-885 ... platinum. 



or per cent. 29-71. 



Experiment. Theory (Chinoline.) 



29-71 29-44 



The real boiling point of lepidine is probably as high as 500° F. (260° C), or 

 even a little higher, and after four more rectifications, no sign of it could be found 

 in the fraction at 420° F., and the nearest approach to a pure base was obtained 

 at 510° F. (265° C). But by so many distillations, at such an elevated tempera- 

 ture, it becomes slightly decomposed, a little pyrrol and carbonate of ammonia 

 being formed ; this in addition to the incombustibility of the fluid rendered its 

 purification and analysis difficult. Fortunately, however, the same remark does 

 not apply to its salts. 



(3*615 grains of lepidine gave 

 11-040 ... of carbonic acid and 

 2-140 ... of water. 



* From Xewos. 

 VOL. XXI. PART II. 4 R 



