2-Chlorobenzoic acid

2-Chlorobenzoic acid
Names
IUPAC name
2-chlorobenzoic acid
Other names
o-Chlorobenzoic acid
Identifiers
118-91-2 YesY
3D model (Jmol) Interactive image
ChEBI CHEBI:30793 YesY
ChEMBL ChEMBL115243 YesY
ChemSpider 8071 YesY
ECHA InfoCard 100.003.897
KEGG C02357 YesY
PubChem 8374
Properties
C7H5ClO2
Molar mass 156.57 g·mol−1
Appearance white solid
Melting point 142 °C (288 °F; 415 K)
Boiling point 285 °C (545 °F; 558 K)
Hazards
Safety data sheet Oxford MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

2-Chlorobenzoic acid is an organic compound with the formula ClC6H4CO2H. It is one of three isomeric chlorobenzoic acids, the one that is the strongest acid. This white solid is used as a precursor to a variety of drugs, food additives, and dyes.[1]

Synthesis and reactions

It is prepared by the oxidation of 2-chlorotoluene. The laboratory scale reaction employs potassium permanganate.[2] Alternatively it arises by the hydrolysis of α,α,α-trichloro-2-toluene.

The chloride is readily replaced by ammonia to 2-aminobenzoic acid. At elevated temperature is decarboxylates.[1]

References

  1. 1 2 Takao Maki, Kazuo Takeda "Benzoic Acid and Derivatives" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a03_555.
  2. H. T. Clarke and E. R. Taylor (1943). "o-Chlorobenzoic acid". Org. Synth.; Coll. Vol., 2, p. 135
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