Chemistry Reference
In-Depth Information
Table 3 Barriers determined by kinetic isomerization experiments in BAEs including thermal decay of photochromism and electrochemical switching
X,Y
Method
a
T
Min
(
C)
T
Max
(
C)
Substitution
Process
Barrier (kcal/mol)
Solvent
References
b
—
2,2
0
-di-H
2
N-
E
,
Z
25
20
80
C
6
H
6
[
186
]
c
CHOH
s
!
a
12.5
[
125
]
d
C
¼
O
t
!
a
15
4
37
DMF
[
174
]
c
NCH
3
s
!
a
15
[
125
]
d
NCH
3
t
!
a
16.4
20
23
DMF
[
174
]
c
S
s
!
a
18
0.5
5
80
MCH/2MP
[
137
]
S
2-Me-
Racem.
27.3
45
75
p
-Xylene
Polarimetry
[
187
,
188
]
2,2
0
-di-Me-
S
E
,
Z
27.4
HPLC
[
188
]
2,2
0
-di-Me-
S
Z
-Enantiom.
27.4
HPLC
[
188
]
CH
¼
CH
s
!
a
36.4
174
DMSO-d
6
NMR
[
189
]
CH
¼
CH, CH
2
-CH
2
s
!
a
23.6
40
CDCl
3
NMR
[
76
]
CH
¼
CH, C
6
H
4
s
!
a
36.4
186
DMSO-d
6
NMR
[
76
]
a
Method for concentration and/or rate determination
b
Separation by flash chromatography and photometry
c
Thermal reversion of the photochromic E form
d
Electrochemical experiments
