Chemistry Reference
In-Depth Information
Table 4 Conformations, symmetry and chirality of BAEs
Unsubstituted
Monosubstituted
Disubstituted
R
¼
R
0
¼
H
R
6¼
H, R
0
¼
H
R
¼
R
R
¼
R
0
or R
6¼
R
0
Homomerous
Heteromerous
Homomerous or heteromerous
Homomerous
Heteromerous
X
¼
Y
X
6¼
Y
X
¼
YorX
6¼
Y
X
¼
Y
X
6¼
Y
(
C
2v
(
z
))
a
(
C
s
(
yz
))
a
(
E
:
C
2h
(
x
);
Z
:
C
2v
(
y
))
a
(
E
,
Z
:
C
s
(
yz
))
a
p-
D
2h
achiral
(
E
,
Z
:
C
s
(
yz
))
a
p-
C
2v
(
z
) achiral
p-
C
2v
(
z
) achiral
"
"
(
C
s
(
yz
))
a
p-
C
2h
(
x
) achiral
"
p
E
-
C
2h
(
x
) achiral
"
(
Z
:
C
s
(
yz
))
a
(
E
:
C
s
(
yz
))
a
p-
C
2v
(
y
) achiral
"
"
"
p
Z
-
C
2v
(
y
) achiral
p-
C
s
(
yz
) achiral
p-
C
s
(
yz
) achiral
p-
C
s
(
yz
) achiral
p
E
-
C
s
(
yz
) achiral
p
E
-
C
s
(
yz
) achiral
p
Z
-
C
s
(
yz
) achiral
p
Z
-
C
s
(
yz
) achiral
(
C
2
(
z
))
a
(
C
1
)
a
(
E
:
C
1
;
Z
:
C
s
(
xy
))
a
(
E
,
Z
:
C
1
)
a
pt-
C
2h
(
z
) achiral
(
C
2v
(
d
)
b
)
a
(
C
s
(
d
)
c
)
a
(
E
:
C
2
(
x
);
Z
:
C
2
(
y
))
a
(
E
,
Z
:
C
1
)
a
t
⊥
-
D
2d
achiral
t
⊥
-
C
2v
(
d
)
b
achiral
t
⊥
-
C
2v
(
d
)
b
achiral
(
E
,
Z
:
C
1
)
a
"
"
t
⊥
-
C
s
(
d
)
c
achiral
t
⊥
-
C
s
(
d
)
c
achiral
t
⊥
-
C
s
(
d
)
c
achiral
"
"
t
⊥
PM
-
S
4
(
z
) meso
d
(
C
2
(
z
))
a
(
C
1
)
a
"
"
(
C
2
(
z
))
a
(
C
1
)
a
(
E
:
C
2
(
x
);
Z
:
C
2
(
y
))
a
(
E
,
Z
:
C
1
)
a
t
P
-
D
2
chiral
(
E
,
Z
:
C
1
)
a
t
P
-
C
2
(
z
)
chiral
t
P
-
C
2
(
z
)
chiral
"
"
(
C
1
)
a
(
E
:
C
1
)
a
ta
P
-
C
2
(
y
)
chiral
"
"
ta
Z-RPR
0
-
C
2
(
y
)
chiral
(
C
1
)
a
ts
P
-
C
2
(
x
)
chiral
"
ts
E-RPR
0
-
C
2
(
x
)
chiral
"
(
Z
:
C
1
)
a
(continued)
