Meta- (chemistry)

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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 metabisulfite:
2 bisulfite (HSO3−) → 1 metabisulfite S2O52− + H2O
and metaphosphoric acid:
3 orthophosphoric acid H3PO4 → 1 trimetaphosphoric acid (H3P3O9) + 3 H2O.
Meta-antimonic acid, the dehydrated form of antimonic acid (H3SbO4), is HSbO3.[2]

See also

  • Arene substitution patterns

References

  1. ↑ dictionary.reference.com: meta-
  2. ↑ Sir William Crookes: Chemical news and journal of industrial science, Volume 31 PD @ books.google. 1875; p.76 PDF:
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