400 MR C. G. WILLIAMS’ RESEARCHES ON 
On Cryptidine, a new Volatile Alkaloid homologous with Chinoline. 
In examining the highest fractions of the bases from coal-tar, I have ascer- 
tained the presence of a new volatile base, to which I have given the above 
name.* The quantity at my disposal was so exceedingly small, that the plati- 
num salt is the only compound I have been able to obtain in a state of tolerable 
purity; but the analyses of this substance leave no doubt whatever of the con- 
stitution of this the third homologue of the chinoline series. 
If a solution of bichloride of platinum be added to a solution in hydrochloric 
acid of the fraction boiling about 525°, a pasty yellow mass precipitates, and, 
on stirring, adheres to the rod. In a few seconds the precipitate becomes crys- 
talline, and is no longer adhesive, and, if it is now dissolved in boiling water, 
it separates on cooling in groups of yellow needles, sparingly soluble in cold 
water. Two specimens of salt prepared in this manner, and well washed, first 
with water, and after with a mixture of alcohol and ether, yielded on combus- 
tion the numbers following :— F 
8-018 on platinochloride eryptidine, dried at 212°, gave 
T. ¥ 10°535 carbonic acid, and 
2°493 ... water. 
6066 ... platinochloride of eryptidine, gave 
1645 ... platinum. 
8-958 ... platinochloride of eryptidine (another preparation), gave 
III. { 11:807 ... carbonic acid, and 
2647 ... water. 
tv, f 5990... platinochloride of eryptidine, gave 
“| 1:631 ... platinum. 
Experiment. Mean. Calculation. 
ee 
Ts I. Il. IV. 
Carbon, . . . 35°83 ie 35°95 wo 35°89 36°31 C,, 132 
Hydrogen, . . 38°45 sac 3°28 ong 3°37 3:30 H, 12 
Nitrogen;, © sy.) ser Ms afk ne pat 385 N 14 
Chlorine, Of boners ey as ee ah 29°30 Cl, 106°5 
Platinum;,..> 27°12 hic 27°23 «27°18 27:24 Pt 99:0 
100-00 363°5 
If the fraction boiling at 515°-25° is treated with ordinary nitric acid, it dis- 
solves with a purple coloration, and, if the solution is evaporated to dryness, 
and redissolved in water, an insoluble yellow powder becomes apparent. To the 
filtered solution bichloride of platinum being added, an adhesive precipitate 
is formed, having the properties previously assigned to the platinochloride of 
cryptidine, as obtained from coal-tar. On solution in boiling water and subsequent 
cooling, a fine crop of orange-yellow needles was obtained, which, on combustion 
with chromate of lead and copper turnings, gave the result annexed. 
* From xegurros. 
