258 
CrooTcer—Aluminium Alcoholates. 
These results show that it corresponds more closely to the 
ethylate than to any other substance which might be formed, 
and they agree very well, considering its hydroscopic nature. 
In the beginning of the reaction there was always a deposition 
of spongy tin upon the aluminium, and it was found, in using 
small amounts of stannic chloride and allowing the reaction to 
take place more slowly, that the yield of the alcoholate was 
invariably larger. 
WITH METHYL ALCOHOL. 
In attempting to prepare the methylate by this reaction, Mr. 
Hastreiter obtained the same result as Gladstone and Tribe. 
Upon adding the usual amounts of stannic chloride to the al¬ 
cohol and aluminium, a reaction began but soon ceased. A larger 
amount caused the action to continue, and finally a gelatinous 
mass resulted. On heating, however, under reduced pressure, 
no distillate could be obtained. From the reaction, however, 
and from other experiments which were made, he was led to be¬ 
lieve that the methylate was formed, but that it decomposed on 
heating even in vacuo . 
WITH PROPYL ALCOHOL. 
Mr. Hastreiter succeeded without difficulty in preparing the 
aluminium propylate by this reaction; only it was found neces¬ 
sary to keep the temperature at that of the water bath during 
the reaction. On distillation the yield was large and of a deli¬ 
cate amber color when liquid but white and opaque when solid. 
It boiled at 255° C. under a pressure of 15 mm. and melted at 
65° C. On analysis it gave 
Theoretical. 
Found. 
I. 
II. 
Aluminium. 
13.10 
14.30 
13.20 
