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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 5 IO 6, and metaperiodic acid, which has the formula HIO 4. Periodic acid was discovered by Heinrich Gustav Magnus and C. F ...
For example, dehydration of orthoperiodic acid gives metaperiodic acid. Such naming conventions are now obsolete; however, various traditional names containing these prefixes have been retained in IUPAC nomenclature, namely: orthosilicic acid, Si(OH) 4; orthotelluric acid, Te(OH) 6; orthophosphoric acid, PO(OH) 3; orthoboric acid, B(OH) 3
Orthoperiodic acid, H 5 IO 6, is stable, and dehydrates at 100 °C in a vacuum to metaperiodic acid, HIO 4. Attempting to go further does not result in the nonexistent iodine heptoxide (I 2 O 7), but rather iodine pentoxide and oxygen. Periodic acid may be protonated by sulfuric acid to give the I(OH) + 6 cation, isoelectronic to Te(OH) 6 and ...
Orthoperiodic acid, H 5 IO 6, is stable, and dehydrates at 100 °C in a vacuum to Metaperiodic acid, HIO 4. Attempting to go further does not result in the nonexistent iodine heptoxide (I 2 O 7), but rather iodine pentoxide and oxygen. Periodic acid may be protonated by sulfuric acid to give the I(OH) + 6 cation, isoelectronic to Te(OH) 6 and ...
Ortho effect is an organic chemistry phenomenon where the presence of a chemical group at the at ortho position or the 1 and 2 position of a phenyl ring, relative to the carboxylic compound changes the chemical properties of the compound.
Periodic acid Or per-iodic acid, is pronounced / ˌ p ɜːr aɪ ˈ ɒ d ɪ k / PURR-eye-OD-ik and not * / ˌ p ɪər i ˈ ɒ d ɪ k / PEER-ee-OD-ik. It refers to one of two interconvertible species: HIO 4 (metaperiodic acid), or H 5 IO 6 (orthoperiodic acid – illustrated at right).
The yield of a is found to be maximised when PCC is not used in stoichiometric quantities but as a co-oxidant; the best effect (50–70% yield of a) is achieved for orthoperiodic acid as the main oxidiser with a 5% molar PCC. [1] Acetonitrile (MeCN) over the usual DCM is used as the solvent.
For example, phosphoric acid, H 3 PO 4, has sometimes been called orthophosphoric acid, in order to distinguish it from metaphosphoric acid, HPO 3. [8] However, according to IUPAC's current rules, the prefix ortho-should only be used in names of orthotelluric acid and orthoperiodic acid, and their corresponding anions and salts. [10]