Meta- (chemistry)
Systematic naming prefix in chemistry / From Wikipedia, the free encyclopedia
In chemistry, meta is a prefix, used for systematic names in IUPAC nomenclature. It has several meanings.[1]
- In organic chemistry, meta indicates the positions of substituents in aromatic cyclic compounds. The substituents have the 1,3-positions, for example in resorcinol.
- Meta may also denote the dehydrated form of an acid, salt or organic derivative in a series. For example:
- 2 bisulfite (HSO−3) → 1 metabisulfite (S2O2−5) + H2O
- 3 orthophosphoric acid (H3PO4) → 1 trimetaphosphoric acid (H3P3O9) + 3 H2O
- Meta-antimonic acid, the dehydrated form of antimonic acid (H3SbO4), is HSbO3.[2]