HENDERSON. — CONCERNING POSITION ISOMERISM. 



G43 



Differences from 156.2 Cal, the ^^normaV Value. 



11. 



CH3 -> COOH 



a CHs 



/3 CHs 



y CH3 



8 CHs 



e CHs 



4 CHs 



V CHs 



e CHs 



I CHs 



/3 CHs 



P CHs 



P CHs 



P CH3 



fi CHs 



ft CHs 



ft CHs 



ft CHs 



ft CHs 



/? CHs 



ft CHs 



COOH present. 12 



COOH - COOH • COOH 



CH2 • COOH - COOH • CH2 • COOH 

 (CH2)2 • COOH - COOH • (CH2)2 • COOH 

 (CH2)3 • COOH - COOH • (CH2)3 ' COOH 

 (CH2)4 • COOH - COOH • (CH2)4 ' COOH 

 (CH2)5 • COOH - COOH • (CH2)5 • COOH 

 (CH2)6 • COOH - COOH • (CH2)6 • COOH 

 (CH2)7-COOH-COOH-(CH2)rCOOH 

 (CH2)8-C00H-C00H-(CH2)8-C00H 



CH. • COOH - COOH • CH2 • COOH 



(CH^)^ 

 (CH2)s 

 (CH2)3 



(CH2). 



(CH^)^ 

 (CH2)5 



(CHOe 



(CH2), 

 (CHo)8 

 (CH2)9 



COOH -XVI ^.C(C00H)2 



COOH- CHs •CH(C00H)2 



COOH-CaHs-CHCCOOH)^ 



C00H-(CHs)2-C(C00H)2 



CHs\. 



C2H5/' 



C00H-CsHrCH(C00H)2 

 C00H-(C2H6)2-C(C00H)2 



C00H-^^^'^)C(C00H)2 



COOH- (C3H7)2 • C (C00H)2 

 COOH- CtHis • CH (C00H)2 

 COOH - CsHn • CH (C00H)2 



207 - 60 = 147 



364 - 207 = 157 



520 — 357 = 163 



677-515 = 162 



832 - 669 = 163 



989 - 829 = 160 



1145-984 = 161 



1302- 1141 = 161 



1458-1297 = 161 



364 - 207 = 157 

 520 — 362 = 158 

 677 - 518 = 159 

 677 -515= 162 



832 - 676 = 156 



832 - 675 

 989 — 833 



157 

 156 



1145 — 990 = 155 



1302 - 1146 = 156 

 1458 — 1303 = 155 

 1616 - 1458 = 158 



" Stohmann, Jour. f. prakt. Cliem., 49, 107, 114, 116 (1894). 



