Chemistry Reference
In-Depth Information
The C nh Groups (n
=
2 , 3 , 4 , 5 , 6 )
E
C 2
C 2 h
ˆ
ı
σ h
ˆ
x 2 ,y 2 ,z 2 ,xy
A g
1
1
1
1
R z
B g
1
1
1
1
R x ,R y
xz,yz
A u
1
1
1
1
z
B u
1
1
1
1
x,y
E
C 3
C 3
S 3
S 3
C 3 h
σ h
=
exp ( 2 πi/ 3 )
A
x 2
y 2 ,z 2
11 1
1 1 1 R z
+
E 1
¯
1
¯
(x 2
y 2 ,xy)
(x,y)
1
¯
1
¯
A
11 1
1
1
1
z
E 1
¯
−¯
1
(R x ,R y )
(xz,yz)
¯
−¯
1
1
E
C 4
C 2
C 4
S 4
S 4
C 4 h
ˆ
ı
σ h
ˆ
x 2
y 2 ,z 2
A g
1
1
1
1
1
1
1
1
R z
+
x 2
y 2 ,xy
B g
1
1
1
1
1
1
1
1
E g 1
i
1
i
1
i
1
i
(R x ,R y ) , )
1
i
1
i
1
i
1
i
A u
1
1
1
1
1
1
1
1
z
B u
1
1
1
1
1
1
1
1
E u 1
i
1
i
1
i
1
i
(x,y)
1
i
1
i
1
i
1
i
E
C 5
C 5
C 5
C 5
S 5
S 5
S 5
S 5
C 5 h
σ h
ˆ
=
exp ( 2 πi/ 5 )
A
x 2
+ y 2 ,z 2
11111 1 1 1 1 1 R z
E 1 1
2
2
2
2
¯
¯
1
¯
¯
(x,y)
2
2
2
2
1
¯
¯
1
¯
¯
1 2
¯ ¯ 2
2
¯ 2
1
¯
E 2
(x 2
y 2 ,xy)
2
2
2
2
1
¯
¯
1
¯
¯
A
11111
1
1
1
1
1 z
E 1 1
2
2
2
2
¯
¯
1
−¯
−¯
(R x ,R y )(xz,yz)
¯ 2
2
−¯ 2
2
1
¯
1
−¯
E 2 1 2
2
2
2
¯
¯
1
−¯
−¯
2
2
2
2
1
¯
¯
1
−¯
−¯
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