2-Iodobenzoic acid

2-Iodobenzoic acid, or o-iodobenzoic acid, is an organic compound with the formula IC6H4COOH. The synthesis of 2-iodobenzoic acid via the diazotization of anthranilic acid is commonly performed in university organic chemistry labs. One of its most common uses is as a precursor for the preparation of IBX and Dess–Martin periodinane, both used as mild oxidants.

2-Iodobenzoic acid
Names
Preferred IUPAC name
2-Iodobenzoic acid
Other names
o-Iodobenzoic acid
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.001.682
UNII
  • InChI=1S/C7H5IO2/c8-6-4-2-1-3-5(6)7(9)10/h1-4H,(H,9,10) Y
    Key: CJNZAXGUTKBIHP-UHFFFAOYSA-N Y
  • O=C(O)c1ccccc1I
Properties
C7H5IO2
Molar mass 248.018
Density 2.25 g/cm3
Melting point 162 °C (324 °F; 435 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Synthesis

2-Iodobenzoic acid can be synthesized via a Sandmeyer reaction consisting of the diazotization of anthranilic acid followed by a diazo replacement. First anthranilic acid is treated with nitrous acid in order to convert the amino group into the diazo group. The diazo group is ejected, yielding a carbocation which is then attacked by highly nucleophilic I anion.

Diazo replacement of anthranilic acid.

The nitrous acid is usually generated in situ from sodium nitrite.

References

    Loda

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