284 M. Carius on new Sulphur Compounds. 
phosphorus, and as taking place in the following manner :— 
5(C?H°O) + P?8> = 5(C?HeS) + P? 0%. 
Alcohol. Pentasulphide Mereaptan. Anhydrous 
of phosphorus. phosphoric acid. 
A careful study of the reaction has led Carius to a different con- 
clusion. He finds that sulphuretted hydrogen is constantly dis- 
engaged, and that mercaptan is only obtained when the mixture 
becomes much heated. . Carius compares the reaction to that of 
anhydrous phosphoric acid on alcohol, and expresses it by the 
equation 
5(C?H0) + P?85 = QPS + cghts nen Po +H PSs s bor s. 
Alcohol. Pentasulphide ( is 
of phosphorus. New es Ne body. 
Both the new substances are formed in some quantity. The 
first of them is an acid, which Carius names diethylsulphophos- 
phoric acid, and is diethylphosphorie acid in which the oxygen 
of the radical phosphoryle is replaced by sulphur. It is a vis- 
cous oily liquid, with a very sour and bitter taste. Itis a stable 
body, but when heated it decomposes with formation of mercap- 
tan. It forms a series of well-defined salts. The lead and zine 
salts have the peculiarity of being precipitated in oily drops, and 
of solidifying when touched with a hard body. The salts, like 
the acid, are inodorous. 
The other body formed as above is disulphophosphate 
WW Q2 
of ethyle, ens ts: It is a colourless oily liquid, with an 
aromatic but somewhat alliaceous odour. By treatment with 
hydrosulphide of potassium it yields the potassium salt of a new 
acid, diethyldisulphophosphoric acid and mercaptan. Thus, 
MW OH25u3, SU 2 
ens ys IRS ee ene K ys Laeii ac 
Hydrosulphide \- )° Mercaptan. 
\ I I 
Disulphophos- of potassium. Diethyldisulphophos- 
phate of ethyle. phate of potassium. 
The action of mereaptan on disulphophosphate of ethyle is very 
interesting as leading to the formation of mixed sulphur-ethers. 
The formation of a mixed sulphur-ether of ethyle and methyle 
takes place as follows :— 
Ps! fe Ps! 0? GC Hs 
ens fs + €H*s: = (C25 ats + * omy s 
: Methyle- 
Disulphophos- tai Vea New sulphur- 
phate of ethyle. phosphoric acid. ether. 
Carius has prepared the corresponding mixed sulphur-ether, 
CT. LS and all Mhorthy decorib 
C2 ie (eee eee e it. 
