text: A number of salts containing the tetrachlorozincate anion, , are known. "Caulton's reagent", , which is used in organic chemistry, is an example of a salt containing . The compound  contains tetrahedral  and Chloride| anions, so, the compound is not caesium pentachlorozincate, but caesium tetrachlorozincate chloride. No compounds containing the  ion (hexachlorozincate ion) have been characterized.
  The compound  may be prepared by careful precipitation from a solution of  acidified with HCl. It contains a polymeric anion  with balancing monohydrated hydronium ions,  ions.
  The coordination complex  (zinc dichloride di(hydroxylamine)), known as Crismer's salt, releases hydroxylamine upon heating.