A study on the formation of complex compounds between bivalent and univalent salts in solution. I. Systems: MeONH4CNSH2O (Me  Zn, Cd or Hg)

Abstract

AbstractThe systems MeONH4CNSH2O (Me  Zn, Cd or Hg) have been studied by isolating the products obtained under different conditions. From solutions of ammonium thiocyanate saturated with the metal oxide, the diammines Me(CNS)2 · 2 NH3, (A), crystallise out. (NH4)2Zn(CNS)4, (NH4)2Cd(CNS)4 and (NH4)Hg(CNS)3, (B), are obtained when the metal oxide dissolved in ammonium thiocyanate (molar ratio 1:4) is allowed to crystallise. Whereas the A‐derivatives hydrolyse in aqueous solutions, the B‐complexes are soluble and can be recrystallised. The A‐products can be converted into the B‐complex salts by dissolving these in ammonium thiocyanate solutions and allowing to crystallise after boiling off ammonia, and the B‐complexes into A‐products by treating their aqueous solutions with ammonia.