Upload
trinhcong
View
212
Download
0
Embed Size (px)
Citation preview
Hess
PERE = E Eref)/N
Eref = Eij
PERE
PERE
PERE
3.1
(=Eref)
HMO
(PERE)
PERE
NMR
(4n+2) (Hi)
Ho)
4n (Hi)
Ho)
1H
1H
[4n+2]-
1H
[4n]-
[10]
15 144°
17
16
15-17
8
17
10
18 NH
15-17
S/R3
J:
S:
R:
Ho Hi
18) (19)
4n (4n+1)
Jahn-Teller
a2 b1
4n
4m+2
23
25 340-420 kJ/mol)
4 170 kJ/mol)
26, 27 (26:285 kJ/mol,
27: >420 kJ/mol)
C-C
27:
1,2,4,5- -t-
t- 131°
( = 131°)
2pz
30,
31