Chemistry Reference
In-Depth Information
Tab. 3.2
(continued)
Phosgene Equivalent or
Substitute
CAS Reg.
no.
Mp [˚C]
Bp [˚C]
(mmHg)
Risk (R) and
Safety (S) Phrases
(Methoxycarbonyl-
sulfamoyl)
triethylammonium
betaine (Burgess
reagent)
29684-56-8
76-79
R: 36/37/38
S: 26-37/39
1,3-Dicyclohexyl-
carbodiimide (DCC)
538-75-0
34-35
122-124 (6)
R: 22-24-41-43
S: 24-26-37/39-45
1,3-Diisopropyl-
carbodiimide
693-13-0
145-148
R: 10-26-36/37/
38-41-42/43
S: 16-23-26-36/
37/39-45
1,3-Bis(2,2-dimethyl-1,3-
dioxolan-4-ylmethyl)-
carbodiimide [Bis-4-
(2,2-dimethyl-1,3-
dioxolyl)methyl
carbodiimide
(BDDC)]
159390-26-8
R: 36/37/38
S: 26-36
2-Chloro-1,3-
dimethylimi-
dazolium chloride
(CDC)
95-100 (dec.)
See [14]
2-Chloro-1,3-
dimethylimi-
dazolium hexafluoro-
phosphate
101385-69-7
231-233
R: 36/37/38
S: 26-36
2-Chloro-1,3-dimethyl-
imidazolium tetra-
fluoroborate
153433-26-2
175-177
R: 36/37/38
S: 26-36
Diethyl azodicarboxylate
(DEAD)
1972-28-7
106 (13)
R: 20/21/22-36/
37/38-40-44
S: 15-23-26-36
Diphenylphosphoryl
azide
26386-88-9
157 (0.17)
R: 23/24/25-36/
37/38
S: 26-28-36/37/
39-45
methanol (0.3 m, 30 equiv.) was found to be a pseudo-first-order process with a k
obs
of 1.0
10
4
s
1
. Under the same conditions, values of k
obs
of 0.9
10
3
s
1
and
10
2
s
1
for the methanolysis of diphosgene and phosgene, respectively,
were determined. The experimental data suggest that, under these conditions, the
maximum concentration of phosgene during the methanolysis of triphosgene and
diphosgene was lower than 1
1.7
10
5
m. Methyl 1,1,1-trichloromethyl carbonate
