| Haloform Reaction |
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Information AboutHaloform Reaction |
| CATEGORIES ABOUT HALOFORM REACTION | |
| chemical tests | |
| organic redox reactions | |
| carbon-heteroatom bond forming reactions | |
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USES The reaction has three application area:
EXAMPLE REACTIONS The reaction for example, with Chlorine : :(1) R-CO-CH3 + 3 Cl2 + 3 OH− → R-CO-CCl3 + 3 Cl− + 3 H2O :(2) R-CO-CCl3 + OH− → RCOOH + −CCl3 :(3) RCOOH + −CCl3 → RCOO− + CHCl3 The reaction for example, with Hypobromite : Haloforms can also be prepared directly from any secondary alcohol containing the CH3-CHOH- group (such as Isopropyl Alcohol ), since this is oxidised under the reaction conditions to the corresponding methyl ketone, which can then undergo the haloform reaction. With Chlorine , it is possible to use Sodium Hypochlorite as a convenient source of both base and chlorine. Fluoroform (CHF3) may not be prepared from a methyl ketone by this reaction, but compounds of the type RCOCF3 do cleave with base to produce CHF3; this is equivalent to the second and third steps in the process shown above. The Iodoform Test is a laboratory test for the presence of a methyl ketone or the related alcohol, by formation of a pale yellow precipitate of iodoform. SEE ALSO REFERENCES
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