1904-5.] A New Method of Preparing Esters. 
833 
Added 25 cc. benzen + 5 cc. alcohol. 
12.13 p.m. temp. 65*4° C. 
.17 
.20 
.50 
1.0 
55 
55 
55 
55 
55 
55 
651° 
65-4° 
65*4’ 
66*7, distillate 35 cc. 
5 cc. benzen + 5 cc. alcohol. 
1.5 „ temp. 66*7 
.10 „ „ 67 - 0, distillate clear. 
After the last addition the distillate was quite clear, i.e. con- 
tained little or no water. 
The contents of the flask were then transferred to a fractionating 
flask and distilled under reduced pressure. The distillation gave 
no trouble and the ester came over at constant temperature ; 
weight of ester 37 gm., yield 90 per cent. 
The whole preparation took less than 5 hours, and did not 
require continuous attention at any time. 
Summary of Test preparations : — 
Acid. 
Alcohol. 
HC1. 
Benzen. 
Ester. 
Percentage. 
Ethyl Tartrate. 
1. 30 gm. 
80 cc. 
1 cc. 
100 cc. 
34 gm. 
83 
2. „ „ 
3 3 3 3 
1 „ 
3 3 3 3 
37 „ 
90 
3. „ „ 
•5 3 3 
4 „ 
3 ’ 3 3 
36 „ 
87 
4. 45 ,, 
3 3 3 3 
2 „ 
3 ’ 3 3 
51 „ 
83 
Ethyl Oxalate. 
5. 18 gm. 
80 cc. 
1 CC. 
100 cc. 
23 „ 
79 
6. ,, ,, 
3 3 3 3 
1 „ 
3 3 3 3 
27 „ 
93 
7. „ „ 
3 3 3 3 
2 „ 
’3 3 3 
23 „ 
79 
8. „ „ 
33 33 
4 „ 
3 3 3 3 
24*5 ,, 
84 
*9. ,, 
60 „ 
1 „ 
M 33 
20 „ 
69 
*10. ,, ,, 
3 3 3 3 
1 ,5 
3 3 3 3 
22 „ 
76 
Ethyl Succinate. 
11. 25 gm. 
80 cc. 
4 cc. 
100 cc. 
34-5 „ 
94 
*12. 23-5 „ 
60 „ 
1 ,, 
3 3 3 3 
29 „ 
83 
*13. 23-5 ,, 
3 3 3 3 
1 „ 
3 3 ; > 
28 „ 
81 
Ethyl Benzoate. 
14. 25 gm. 
80 cc. 
2 cc. 
100 cc. 
20 „ 
66 
*15. 24-5 „ 
60 „ 
l „ 
3 3 3 3 
16 ,, 
53 
*16. 24*5 ,, 
3 3 3 3 
1 ,, 
3 3 3 3 
18 „ 
60 
PEOC. EOY. SOC. EDIN. — VOL. XXV. 53 
