Azobisisobutyronitrile Cas 78-67-1
These radicals formed by the decomposition of AIBN can initiate free-radical polymerizations and other radical-induced reactions. For instance, a mixture of styrene and maleic anhydride in toluene will react if heated, forming the copolymer upon addition of AIBN. Another example of a radical reaction that can be initiated by AIBN is the anti-Markovnikov hydrohalogenation of alkenes. AIBN has also been used as the radical initiator for Wohl–Ziegler bromination. The AIBN-derived 2-cyano-2-propyl radical abstracts the hydrogen from tributyltin hydride.[4] The resulting tributyltin radical can be used for removal of a bromine atom.
AIBN-derived radicals abstract a hydrogen from HBr to give a bromine radical, which can add to alkenes. This type of hydrohalogenation of an alkene proceeds with anti-Markovnikov selectivity.
Azobisisobutyronitrile Cas 78-67-1 product information:
| Product Name: | 2,2′-Azobis(2-methylpropionitrile) |
| Synonyms: | A,A’-AZOISOBUTYRONITRILE;AIBN;ALPHA,ALPHA’-AZOBISISOBUTYRONITRILE;ALPHA,ALPHA-AZOBISISOBUTYRONITRILE;ALPHA,ALPHA’-AZO-DI-ISO-BUTYRONITRILE;ALPHA,ALPHA’-AZOISOBUTYRONITRILE;2,2′-dicyano-2,2′-azopropane;2,2′-Dimethyl-2,2′-azodipropionitrile |
| CAS NO: | 78-67-1 |
| EINECS: | 201-132-3 |
| Molecular Formula: | C8H12N4 |
| Molecular Weight: | 164.21 |
| Melting point: | 102-104 °C (dec.)(lit.) |
| Boiling Point: | 281.68°C (rough estimate) |
| Appearance: | white solid |
| Storage: | 2-8°C |
| Solubility: | Insoluble in water |
| Applications: | 1. Organic synthesis intermediates 2. Used as an initiator for high molecular weight polymers 3. Catalyst for methacrylate-embedded tissue. |
Preparation of 2,2′-azobis(2-methylpropionitrile)：
2,2′-Azobis(2-methylpropionitrile), which is used as a foaming agent and a radical polymerization initiator, is produced in a high yield and a high purity, by (1) subjecting a crude 2-amino-2-methylpropionitrile product obtained by the reaction between acetone cyanohydrin and ammonia, to reduced pressure distillation, (2) contacting the resulting purified 2-amino-2-methylpropionitrile product having an ammonia content of 1.5% by weight or less with an aqueous metal hypochlorite solution, and then (3) treating the resulting aqueous suspension of 2,2′-azobis(2-methylpropionitrile) with a reducing agent.
What is 2,2′-Azobis(2-methylpropionitrile)?
2,2′-Azobis(2-methylpropionitrile) (AIBN) is a radical initiator. AIBN solution can be used to initiate radical-induced reactions, specifically free-radical polymerizations. It can be used in:Synthesis of styrene-vinyl pyridine diblock copolymers by reversible addition-fragmentation chain transfer (RAFT) polymerization.Preparation of silicon oxycarbide glasses.Synthesis of poly [N-(p-vinyl benzyl) phthalimide] for the preparation of titanium dioxide composites for electrophoretic displays.
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