908 | BAB IO 
evaporated, a small amount of water was added, and the acid 
liberated by the addition of concentrated hydrochloric-acid to the: 
cooled solution. The acid separated in solid form. It may be 
recrystallized from benzene from which solvent it separates in 
long, transparent, prismatic needles. It is slightly soluble in 
water but practically insoluble in concentrated salt solution. 
114 gm. of this dibasic acid were obtained from 100 gm. of 
malonic ester, corresponding to a yield of 84 per cent of the 
theory. Dibutylmalonic acid melts at 163° with slight mages 
position. 
0.1461 gm. substance gave 0.3260°gm. CO: and 0.1199 gm. H,0O. 
Calculated for Found: 
-C11H2001: ; 
CUO, thie iiyis: ROR SEL RN OR et i a ee 61515 60.85 
Ws Brera, en rer EE oe ets en Ry PE gf 9.20 9.19 
— 2-Butylhexylic Acid. 
CH 
eHcooH 
CH, 
The following will describe a typical experiment by which this 
acid was prepared. 120 gm. of dibutylmalonic acid: were heated 
in a distilling flask to 180°. This temperature was maintained 
until the carbon dioxide was no longer evolved. ‘The liquid re- 
maining in the flask was then distilled. At atmospheric pressure 
2-butylhexylic acid boils at 255° (corrected); at 16 mm. the 
boiling point is 153°. The specific gravity at 16° is 0.899. The 
yield was 90 gm. ; 
0.1681 gm. substance gave 0.4285 gm. Co, and 0.1711 gm. H2O. 
Calculated for Found: 
CioH2002: | 
BRAD mR OP SOI eis ee ob st cad, ar Migr ea 69.76 69.51 
El vex. Bid Spaced shld An ated nites aie et fo iah phere ais er weet LD Be 11.39 
Ethyl 2-Butylhecylate. 
130 gm. of the corresponding acid were boiled for 8 hee with: 
four molecules of absolute alcohol and a small amount-of sulfuric 
acid. The yield of’ ester was 144 gm. Ethyl pian 
boils at 114 115° at LS mm. (corrected). 
