592 PROFESSOR ANDERSON ON THE PRODUCTS OF THE : 
although it is not formed in accordance with the received nomenclature of organic 
compounds, the more especially as it would be difficult, in the present state of our 
knowledge, to find another which would not be open to many objections. As far as 
its properties and chemical relations go, pyrrol approaches more nearly to the vola- 
tile organic bases than to any other class of nitrogenous compounds, but its basic 
properties are extremely weak, as it has no effect on test papers, and though 
soluble in dilute acids, can be expelled from the solution at the boiling heat. It 
forms, however, compounds with corrosive sublimate and chloride of cadmium, 
both of which are easily decomposed. 
Mercury Compound of Pyrrol—This substance is obtained by mixing alcho- 
holic solutions of pyrrol and corrosive sublimate, when it is immediately precipi- 
tated as a white powder with a somewhat crystalline appearance, insoluble in 
water, and sparingly soluble in cold alcohol. It is more soluble on boiling, but 
is then partially decomposed. Excess of corrosive sublimate appears also to act 
upon it in some way, as the solution from which it has been deposited acquires, 
on standing, a dark red, and sometimes a fine purple colour, due, in all probabi- 
lity, to the oxidation of pyrrol. The substance employed for analysis was dried 
in vacuo, and was from different preparations :— 
I 7-186 grains of mercury compound gave 
2:079 ... carbonic acid, 
2-472 ... carbonic acid and 
8:906 grains of mercury compound gave 
II. 
0-652 «+. Water. 
III 7°131 grains of mereury compound gave 
"477 «.. mercury. 
Experiment. Calculation. 
_—_— eo —«—«—_= ??rer=d-_ 
I. I, 
Carbon, 3 : : 7:89 7:57 7:88 C, 48 
Hydrogen, . ; 5 be 0-81 0-82 H, 5 
Nitrogen, . ; 6 aoc baie 2°31 N 14 
Chlorine, : : sac 502 23°31 Cl, 142 
Mercury, 5 . - — 66°89 65:68 Hg, 400 
100-00 609 
Corresponding with the formula C,H, N + 2 Hg Cl,. 
Cadmium Compound of Pyrrol is obtained as a white crystalline powder, when 
alcoholic solutions of pyrrol and chloride of cadmium are mixed. It is insoluble 
in water, but dissolves readily in hydrochloric acid. It is rapidly decomposed 
when heated, either dry or in suspension in water or alcohol. Its analysis gave 
4:837 ... _ carbonic acid and 
5'673 grains of cadmium salt gave 
119° i. water. 
