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| CAS No.: | 460-12-8 |
|---|---|
| Name: | Diacetylene |
| Article Data: | 138 |
| Molecular Structure: | |
|
|
|
| Formula: | C4H2 |
| Molecular Weight: | 50.0599 |
| Synonyms: | Butadiyne(8CI); Biacetylene; Biethynyl; Diacetylene |
| EINECS: | 207-303-9 |
| Density: | 0.806g/cm3 |
| Melting Point: | -35.99°C |
| Boiling Point: | 10.3°Cat760mmHg |
| Flash Point: | °C |
| Solubility: | 1g/L(25 oC) |
| Appearance: | gas |
| Safety: | A dangerous explosive. Polymerizes violently above 0°C. Arsenic pentafluoride catalyzes explosive polymerization. Reaction with silver nitrate forms a very explosive friction-sensitive product. When heated to decomposition it emits acrid smoke and fumes. |
| PSA: | 0.00000 |
| LogP: | 0.25280 |
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| Conditions | Yield |
|---|---|
| With potassium hydroxide In dimethyl sulfoxide at 70 - 75℃; into -78 deg C cooling trap; | 93% |
| With potassium hydroxide In tetrahydrofuran; water; dimethyl sulfoxide at 95℃; for 0.25h; | 90% |
| With potassium hydroxide Dehydrochlorination; | 50% |
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ethynylmagnesium chloride
- 460-12-8
Butadiyne
| Conditions | Yield |
|---|---|
| With 1,2-dichloro-ethane; manganese(ll) chloride In tetrahydrofuran at 25℃; for 12h; Inert atmosphere; | 67.5% |
| Conditions | Yield |
|---|---|
| Zersetzung durch Ultraschall; |
| Conditions | Yield |
|---|---|
| With calcium hydroxide at 125 - 130℃; | |
| With barium dihydroxide at 125 - 130℃; | |
| With potassium carbonate at 125 - 130℃; |
| Conditions | Yield |
|---|---|
| bei der Einw. dunkler elektrischer Entladungen; |
| Conditions | Yield |
|---|---|
| at 970 - 1170℃; Pyrolysis; |
- 34557-54-5
methane
- 460-12-8
Butadiyne
| Conditions | Yield |
|---|---|
| bei der Funkenentladung; |
| Conditions | Yield |
|---|---|
| bei der pyrogenen Spaltung im Lichtbogen; |
| Conditions | Yield |
|---|---|
| With potassium hydroxide |
- 36678-47-4
1,2-dibromo-buta-1,3-diene
- 460-12-8
Butadiyne
| Conditions | Yield |
|---|---|
| With potassium hydroxide |
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- Total:31 Page 1 of 1 1
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Chemistry
IUPAC Name: Buta-1,3-diyne
The MF of Diacetylene (CAS NO.460-12-8) is C4H2.
The MW of Diacetylene (CAS NO.460-12-8) is 50.05868.
Synonyms of Diacetylene (CAS NO.460-12-8): 1,3-Butadiin ; 1,3-Butadiyne ; Biacetylene ; Biethynyl ; Butadiyne
Stability: Stability Highly flammable
Index of Refraction: 1.436
Boiling Point: 10.3 °C
Melting Point: -10 °C
Density: 0.806 g/ml
Appearance: gas
EINECS: 207-303-9
Uses
Diacetylene (CAS NO.460-12-8) is used in organic synthesis.This product is an unsaturated aliphatic hydrocarbons, with a simple asphyxiation and weak narcotic effect.
Safety Profile
A dangerous explosive. Polymerizes violently above 0°C. Arsenic pentafluoride catalyzes explosive polymerization. Reaction with silver nitrate forms a very explosive friction-sensitive product. When heated to decomposition it emits acrid smoke and fumes.Safety information of Diacetylene (CAS NO.460-12-8):
RIDADR 3161
HazardClass 2.1
Specification
Diacetylene has been identified in the atmosphere of Titan and in the protoplanetary nebula CRL 618 by its characteristic vibrational modes. The molecule is most likely to have formed in Titan's atmosphere by a reaction between acetylene and the ethynyl radical C2H, which is produced when acetylene undergoes photolysis. This radical can in turn attack the triple bond in acetylene and react efficiently even at cold temperatures.
Diacetylene, with the formula C4H2, is a highly unsaturated hydrocarbon that contains one single bond and two triple bonds. It is the first in the series of polyynes.