M. Reboul on Derivatives of Glycerine. 299 
_ Tin may also be directly dissolved in sesquichloride of iron to 
which hydrochloric acid has been added, 
Sn-+ 2 Fe? Cl?= Sn Cl?+ 4 Fe Cl. 
But this method is only available with tolerably pure tin; for 
-tmany other metals reduce perchloride of iron, and consume 
solution of permanganate. 
There are several compounds which have the formula C+ H*Cl?. 
One of these is obtained by the action of pentachloride of phos- 
phorus on aldehyde, and another by the action of chlorine on 
chlorinated ethyle. Beilstein observed some time ago that these 
two bodies were identical, and he has recently proved* that the 
same is the case with two corresponding isomeric compounds of 
the .benzoic acid series: the one, chlorobenzole, C!* H® Cl?, is 
obtained by the action of pentachloride of phosphorus on oil of 
bitter almonds; and the other is the chlorinated chloride of ben- 
zyle, C'4 (H® Cl) Cl. 
The latter body is formed, as Cannizaro showed, by the action 
of chlorine on toluole; and Beilstein used this method of pre- 
paring it. He finds that it has all the physical properties of 
chlorobenzole. A careful comparison also of the chemical 
actions of the two substances, both by his own direct experi- 
ments and by those of other experimenters, leave no doubt as to 
the complete identity of the two substances. 
Reboul has published} the results of a lengthened and im- 
portant investigation on some derivatives of glycerine. The 
compounds which the author describes may be derived from an 
oxygenized body, glycide, C® H® 04, which has not been isolated, 
and which might be considered as the anhydride of glycerine, to 
which it would bear the same relation as lactide does to lactic 
acid. It would play the part of a diatomic alcohol, and would 
yield a series of ethers, the general formation of which may be 
thus expressed :— 
C® H6 044 A— H? 0?=C® 4A O02, 
C° Hé 04+ A A’—2H?0?=Co BH? A A’, 
A and A! representing the formule of monobasic acids. 
The starting-point for his research 1s hydrochloric glycide, ob- 
tained by the action of potash on bihydrochloric glycerine, 
C® H® Cl? 02, which simply removes hydrochloric acid, 
C® A Cl? O? —HCl=C® H? C10. 
Bihydrochloric glycerine itself is formed by saturating a mix- 
* Liebig’s Annalen, December 1860. 
+ Annales de Chimie, September 1860. Répertoire de Chimie, November 
1860. 
