1921.] Recent Advances in Stereochemistry. 219 
conjugated double bonds on rotation which was discovered in 
1903 from experiments on the Menthyl esters of Sorbic acid, 
CH,. CH : CH. CH : CH. CO,R, (Rupe, Annalen, 1903, 327, 167) 
is convincingly shown by recent work. Some interesting results 
on this relation, which have been obtained by the writer in the 
case of derivatives of imino and amino-camphor are shown in 
the following Table :-— 
Difference 
Hg joo4 
o 
__ 
rs 
Wan 
—O a0o-90 
x i 
z oe pea 4 
mut 
0) ) 
— Zz 
NJ ria 
S.& 
Q 
Bt © 
cs) 
(2) 
ps 
#5) 
enn, 
(@) 
@ 
a 
rs 
a a 
o-0 O 
. || 
OZ} 
@ 
9)) 
gi 
2 1304 
CH n< > 
Ye Sa I Se! 
Coan oe <a, 2177 
c=0O 
3 y isl2 
CH-NH CH 
et —<>eHs 265 
a a(t 
C=N 
Ce Ba Le ~ » 1382 
4 \ 146-3 
CH-NH 235:7 
Co AN i <> 
S 14 ou Br 
“g Balls Br sas 
5 | 1060°4 
CH ni< > 277-6 
Cc. # 
8 #14 ne - 
ce ge i695. 
eno 1406°1 
Cu 
Feel 
a ao 
+ _= 
5B > 
A~€e 
ll 
O 
-—o 
, = 
4 
pe 
wa 
bs | 
wo 
fey) 
@ 
(‘ 
