Meta- (chemistry)

In

• In
  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 (HSO−3) → 1 metabisulfite (S₂O2−5) + H₂O

  • 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]