Chemistry Reference
In-Depth Information
Table 4 (continued)
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
s
(
yz
))
a
(
C
1
)
a
(
E
:
C
i
,;
Z
:
C
2
(
y
))
a
(
E
,
Z
:
C
1
)
a
a-
C
2h
(
y
) achiral
a
E-RS
0
-
C
i
meso
d
a-
C
i
achiral
"
"
"
(
Z
:
C
1
)
a
(
C
1
)
a
(
E
:
C
1
)
a
at
P
-
C
2
(
y
)
chiral
"
"
at
Z-RPR
0
-
C
2
(y)
chiral
(
E
,
Z
:
C
1
)
a
au-
C
s
(
xz
) achiral
au-
C
s
(
xz
) achiral
"
"
(
C
s
(
yz
))
a
(
C
1
)
a
(
E
:
C
2
(
x
);
Z
:
C
s
(
xy
))
a
(
E
,
Z
:
C
1
)
a
s-
C
2v
(
x
) achiral
(
E
:
C
1
)
a
s-
C
s
(
xy
) achiral
"
"
"
s
Z-RS
0
-
C
s
(
xy
) meso
d
(
C
1
)
a
st
P
-
C
2
(
x
)
chiral
"
st
E-RPR
0
-
C
2
(
x
)
chiral
"
(
Z
:
C
1
)
a
(
E
,
Z
:
C
1
)
a
su-
C
s
(
xz
) achiral
su-
C
s
(
xz
) achiral
"
"
(
E
,
Z
:
C
1
)
a
ft
P
-
C
1
chiral
ft
P
-
C
1
chiral
ft
RP
-
C
1
chiral
ft
E-RPR
0
-
C
1
e
chiral
ft
E-RPR
0
-
C
1
e
chiral
ft
E-RPS
0
-
C
1
f
chiral
ft
E-RPS
0
-
C
1
f
chiral
ft
Z-RPR
0
-
C
1
f
chiral
ft
Z-RPR
0
-
C
1
f
chiral
ft
Z-RPS
0
-
C
1
e
chiral
ft
Z-RPS
0
-
C
1
e
chiral
For chiral conformations, only one enantiomer (
P
) is given. Conformations with
C
1
symmetry are represented by ft listed at the bottom of the table
a
See this point group further down in this column
b
In this orientation of the point group
C
2v
the reflection planes are the diagonal planes
y ¼ x
and
y ¼x
, respectively
c
The reflection plane is the plane
y ¼ x
d
The two moieties have opposite chirality sense
e
The relative direction of folding of the two moieties is
syn
f
The relative direction of folding of the two moieties is
anti
(
C
1
)
a
(
E
,
Z
:
C
1
)
a
f-
C
s
(
xz
) achiral
f-
C
s
(
xz
) achiral
