POSITION OF THE DOUBLE LINKAGE IN PIPERITONE, PART II. 43. 
On combustion the following results were obtained, viz: 
0°1270 gram gave 0°2580 gram COs, and 0°0932 gram water. 
Found. Calculated for CgHy,O4 
Carbon 55°24% 5D 177 
Hydrogen 8°15 8°04 
The generic relation between piperitone and the acids 
described is shown graphically, as follows, viz:— 
CH, CH; CH; 
| | 
C C—OH C=0 COOH 
: /N J x yp 
H.C ‘ CH H,C ‘. COOH H.C H.C 
aoe —> ts 
B,C C=0 H.C\ /COOH HC \ / COOH H.C\ /COOH 
CH CH CH CH 
| | | | 
CH CH CH CH 
Tux EIN JoX aes 
H,C .CH; H;C CH; H;,C CH; H;C CHs 
Piperitone. a-hydroxy-a-methyl a-isopropyl-y-acetyl- a-isopropyl- 
-d-isopropyl adipic acid. butyric acid. glutaric acid. 
Piperitonehydroxylamino oxime.—Most of the published 
methods for the preparation of this substance require heat- 
ing of the solutions, but the best method, in the author’s 
opinion, particularly if using the highly active ketone, is. 
the procedure usually adopted for the preparation of 
Carvoxime, viz:— 
Five grams of ketone in 25 ccs. alcohol and 5 grams. 
hydroxylamine hydrochloride in 5 ces. water, when cold, 
are mixed with a solution of 5 grams caustic potash in 5 ccs. 
water, also cold, and allowed to stand overnight. Within 
a few hours the whole solidifies toa solid mass. On wash- 
ing with water, and recrystallising from alcohol and acetic 
ether a quantitative yield is obtained. 
