1,5-Diazabicyclo[4.3.0]non-5-ene (DBN) is a chemical compound with the formula C7H12N2. It is an amidine base used in organic synthesis. A related compound with related functions is 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). The relatively complex nature of the formal names for DBU and DBN (hence the common use of acronyms) reflects the fact that these compounds are bicyclic and contain several functional groups.
The compounds are employed for dehydrohalogenation reactions as well as base-catalyzed rearrangements.
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Properties
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| Appearance & Physical State: |
colorless to yellowish transparent liquid |
| Density: |
1.005 |
| Boiling Point: |
95-98ºC (7.5 mmHg) |
| Flash Point: |
94ºC |
| Refractive Index: |
1.519-1.521 |
| Water Solubility: |
soluble |
| Stability: |
Stable under normal temperatures and pressures. May discolor on exposure to air and moisture. |
| Storage Condition: |
Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area. Do not expose to air. Store protected from moisture. Store under an inert atmosphere. |
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Safety Info
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| Symbol: |
GHS05 |
| Sign: |
Danger |
| hazard declaration: |
H314 |
| hazard declaration add: |
|
| waring notice: |
P280; P305 + P351 + P338; P310 |
| Hazard Class: |
8 |
| Safety Statements: |
S26-S36/37/39-S45 |
| HS Code: |
29339900 |
| Packing Group: |
II |
| WGK Germany: |
3 |
| RIDADR: |
UN 3267 |
| Risk Statements: |
R34 |
| Hazard Codes: |
C |
