Periodate

Periodate
The metaperiodate ion
The metaperiodate ion
The orthoperiodate ion
The orthoperiodate ion
Names
Systematic IUPAC name
tetraoxoiodate(1−)
hexaoxoiodate(5−)
Identifiers
3D model (JSmol)
ChemSpider
UNII
  • metaperiodate: InChI=1S/HIO4/c2-1(3,4)5/h(H,2,3,4,5)/p-1
    Key: KHIWWQKSHDUIBK-UHFFFAOYSA-M
  • orthoperiodate: InChI=1S/H5IO6/c2-1(3,4,5,6)7/h(H5,2,3,4,5,6,7)/p-5
    Key: TWLXDPFBEPBAQB-UHFFFAOYSA-I
  • Metaperiodate: [O-][I+3]([O-])([O-])[O-]
  • Orthoperiodate: [O-][I+]([O-])([O-])([O-])([O-])[O-]
Properties
IO4− or IO65-
Conjugate acid Periodic acid
Related compounds
Other anions
 Perchlorate
Perbromate
Permanganate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Periodate (/pəˈraɪ.ədeɪt/ pə-RY-ə-dayt) is an anion composed of iodine and oxygen. It is one of a number of oxyanions of iodine and is the highest in the series, with iodine existing in oxidation state +7. Unlike other perhalogenates, such as perchlorate, it can exist in two forms: metaperiodate IO−
4 and orthoperiodate IO5−
6. In this regard it is comparable to the tellurate ion from the adjacent group. It can combine with a number of counter ions to form periodates, which may also be regarded as the salts of periodic acid.

Periodates were discovered by Heinrich Gustav Magnus and C. F. Ammermüller; who first synthesised periodic acid in 1833.[1]

  1. ^ Ammermüller, F.; Magnus, G. (1833). "Ueber eine neue Verbindung des Jods mit Sauerstoff, die Ueberjodsäure". Annalen der Physik und Chemie (in German). 104 (7): 514–525. Bibcode:1833AnP...104..514A. doi:10.1002/andp.18331040709.