Jump to content

Meta- (chemistry)

From Wikipedia, the free encyclopedia
Positions on an aromatic ring relative to the R group

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 (HSO3) → 1 metabisulfite (S2O2−5) + H2O
    3 orthophosphoric acid (H3PO4) → 1 trimetaphosphoric acid (H3P3O9) + 3 H2O

See also

[edit]

References

[edit]
  1. ^ "Definition of meta-". www.dictionary.com. 2016-02-10. Retrieved 2019-10-03.
  2. ^ Kern, Sergius (1875-02-19). Crookes, William (ed.). "New Method of Quantitative Analysis of Ordinary Alloys". Chemical News and Journal of Industrial Science. XXXI (795). London: Chemical news office.: 76.