1531 
the introduction of a double bond (?) into this acid, this constant 
becomes 3.7 times greater. A same increase is also given by the 
two alkyl-substituted glutaconie acids which thus far have been 
ur) 
° | “v | ; | = 
35.204 | 28.78 | 0.076 WSD 1054 
38.638 | 30.35 198 | 1.79 
70.405 | 39.81 | 0.105 1.76 
11.216 | 41.97 | 111 1.78 
140.81 55.01 145 | 1.75 
154.55 58.01 153 | 1.18 
281.62 16.03 200 1.78 
309.10 18.95 208 1.76 
563.25 102.6 | 270 1.77 
618.20 105.8 | 279 1.74 
104.06 111.6 294 1.75 
1126.5 136.0 | 357 | 1.76 
1236.4 141.2 | 371 Ll 
investigated (and which both contain the mobile H-atom) as is 
visible from the subjoined table: 
M.p. | K25 Ratio 
| 
(labile) # Me-glutaconic acid 116° 139 Od ; 
(normal) ,, 5 ri 149° 1.29 5G1054 | +2.3:14 
2 Me-glutaric acid 86° DORI Oe | 
z/-di-Me-glutaconic acid 146 —147° 1029 Ot | 
xy-di-Me-glutaric acid 140—141° DSO | = 253) 2) 1/2) 
5 8 À 127—128° 5.2 10-5 | 
1) FicuteR and Scuwas: Ann. 348, 251 (1906); Anna Dorn: Dissertation Zürich 
pag. 19 — Warpen: Ph. Ch. 8, 486 (1891). 
2) Szyszkowskr: ibid. 22, 172 (1897). On reduction of both #y-dimethylglutaconic 
acids cis zy-dimethylglutaric acid m.p. 128° is formed exclusively (Torre and 
Woop: Soc. 103. 276 (1913)), 
