Riley (1963). Brauer, Georg (ed.). Handbook of preparative inorganic chemistry. Volume 1. Translated by Scripta Technica, Inc. Translation editor Reed F. (2nded.). New York, N.Y.: Academic Press. pp.323–324. ISBN 012126601X. 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. Aylett, founded by A.F. Holleman; continued by Egon Wiberg; translated by Mary Eagleson, William Brewer; revised by Bernhard J. (2001). Inorganic chemistry (1st English ed., [edited] by Nils Wiberg.ed.). San Diego, Calif.: Berlin: Academic Press, W. de Gruyter. p.453. ISBN 0123526515. {{ cite book}}: CS1 maint: multiple names: authors list ( link) Andrew G. Wee, Jason Slobodian, Manuel A. Fernández-Rodríguez and Enrique Aguilar "Sodium Periodate" e-EROS Encyclopedia of Reagents for Organic Synthesis 2006. doi: 10.1002/047084289X.rs095.pub2

Periodic acid is also used as an oxidising agent of moderate strength, as exemplified in the Babler oxidation of secondary allyl alcohols which are oxidised to enones by stoichiometric amounts of orthoperiodic acid with catalyst PCC. [12] Other oxyacids [ edit ] Now charges are reduced. But, if possible, we can try to reduce charges furthermore to obtain the best lewis Na 3 H 2 IO 6 + 2 HNO 3 ⟶ NaIO 4 + 2 NaNO 3 + 2 H 2 O {\displaystyle {\ce {Na3H2IO6 + 2 HNO3 -> NaIO4 + 2 NaNO3 + 2 H2O}}} H 5 IO 6 ⟶ HIO 4 + 2 H 2 O {\displaystyle {\ce {H5IO6 -> HIO4 + 2 H2O}}} Now, there are fourteen electrons around iodine atom. This is acceptable because iodine can keep more than eight Orthoperiodic acid has a number of acid dissociation constants. [7] [8] The p K a of metaperiodic acid has not been determined.a b Riley, edited by Georg Brauer; translated by Scripta Technica, Inc. Translation editor Reed F. (1963). Handbook of preparative inorganic chemistry. Volume 1 (2nded.). New York, N.Y.: Academic Press. pp.323–324. ISBN 012126601X. {{ cite book}}: |first= has generic name ( help) CS1 maint: multiple names: authors list ( link) Periodic acid ( / ˌ p ɜːr aɪ ˈ ɒ d ɪ k/ per-eye- OD-ik) is the highest oxoacid of iodine, in which the iodine exists in oxidation state +7. It can exist in two forms: orthoperiodic acid, with the chemical formula H 5IO 6, and metaperiodic acid, which has the formula HIO 4. Next step is, marking those twelve valence electrons pairs on outside atoms (in this case, oxygen atoms) as Aylett, founded by A.F. Holleman; continued by Egon Wiberg; translated by Mary Eagleson, William Brewer; revised by Bernhard J. (2001). Inorganic chemistry (1st English ed., [edited] by Nils Wiberg.ed.). San Diego, Calif.: Berlin: Academic Press, W. de Gruyter. p.454. ISBN 0123526515. {{ cite book}}: CS1 maint: multiple names: authors list ( link)

They can also be generated directly from iodates by treatment with other strong oxidizing agents such as hypochlorites:NaIO 3 sodium iodate + Cl 2 + 4 NaOH ⟶ Na 3 H 2 IO 6 + 2 NaCl + H 2 O {\displaystyle {\ce {{\overset {sodium\ iodate}{NaIO3}}+Cl2{}+4NaOH->Na3H2IO6{}+2NaCl{}+H2O}}} NaI + 4 Br 2 + 10 NaOH ⟶ Na 3 H 2 IO 6 + 8 NaBr + 4 H 2 O {\displaystyle {\ce {NaI + 4 Br2 + 10 NaOH -> Na3H2IO6 + 8 NaBr + 4 H2O}}}

There are one iodine atom and four oxygen atoms in the periodate ion. Also there is a -1 overall charge onGreenwood, N. N.; Earnshaw, A (1997). Chemistry of the elements (2nded.). Butterworth-Heinemann. p.872. doi: 10.1016/C2009-0-30414-6. ISBN 978-0-7506-3365-9. Fábry, J.; Podlahová, J.; Loub, J.; Langer, V. (1982). "Structure of the 1:1 adduct of orthoperiodic acid and urea". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 38 (3): 1048–1050. doi: 10.1107/S0567740882004932. If charges exist on atoms, they should be marked on now. Marking charges of atoms is important because it is H 5IO 6 ⇌ H 4IO − 6 + H +, p K a=3.29 H 4IO − 6 ⇌ H 3IO 2− 6 + H +, p K a=8.31 H 3IO 2− 6 ⇌ H 2IO 3− 6 + H +, p K a=11.60 Sodium periodate can be used in solution to open saccharide rings between vicinal diols leaving two aldehyde groups. This process is often used in labeling saccharides with fluorescent molecules or other tags such as biotin. Because the process requires vicinal diols, periodate oxidation is often used to selectively label the 3′-ends of RNA ( ribose has vicinal diols) instead of DNA as deoxyribose does not have vicinal diols.