Chemical elements
  Titanium
    Isotopes
    Energy
    Preparation
    Physical Properties
    Chemical Properties
      Titanium Trifluoride
      Titanium Tetrafluoride
      Hydrofluotitanic acid
      Potassium Titanifluoride
      Sodium Titanifluoride
      Titanium Dichloride
      Titanium Trichloride
      Titanium Tetrachloride
      Titanic Chloride
      Titanium Oxychlorides
      Hydrochlorotitanic Acid
      Addition Compounds of Titanium Tetrachloride
      Titanium Tribromide Hexahydrate
      Titanium Tetrabromide
      Titanic Bromide
      Hydrobromotitanic Acid
      Titanium Chlorobromides
      Titanium Di-iodide
      Titanium Tri-iodide
      Titanium Tetra-iodide
      Titanic Iodide
      Titanium Monoxide
      
Titanium Sesquioxide
      Titanium Dioxide
      Titanic Oxide
      Titanic Hydroxides
      Metatitanic Acid
      Titanates
      Titanium Monosulphide
      Titanium Sesquisulphide
      Titanium Disulphide
      Titanium Sulphates
      Titanous Sulphate
      Titanium Sesquisulphate
      Complex Sulphates of Tervalent Titanium
      Normal Titanic Sulphate
      Potassium Titanisulphate
      Potassium and Ammonium Titanylsulphates
      Titanous Nitride
      Titanic Nitride
      Titanamide
      Titanium Nitrogen Halides
      Titaninitric Acid
      Titanium Phosphide
      Titaniphosphoric Acid
      Titanium Carbide
      Titanium Cyanonitride
      Titanium Thiocyanates
      Titanium Sesquioxalate
      Titanitartrates and Allied Salts
      Titanium Silicide
      Pertitanates

Titanium Sesquioxalate, Ti2(C2O4)3






Titanium Sesquioxalate, Ti2(C2O4)3.10H2O, crystallises in yellow prisms, soluble in water, when alcohol is added to a solution of titanium trichloride mixed with excess of oxalic acid. The following double salts have also been obtained, Ti(NH4)(C2O4)2.2H2O, TiK(C2O4)2.2H2O, TiRb(C2O4)2.2H2O, and the colour of their solutions show that they contain complex anions.

The following oxalates of quadrivalent titanium have been prepared. Hydrated titanyl oxalate, TiOC2O4.xH2O, has been obtained in an uncrystallised condition by dissolving titanic acid in concentrated aqueous oxalic acid solution; if, however, titanic acid is boiled with alcoholic oxalic acid, and the solution precipitated with ether, TiOC2O4.C2H5OH is formed as a crystalline precipitate, soluble in water and alcohol, whilst the more basic salt, Ti2O3C2O4.12H2O, is precipitated by alcohol from a concentrated solution of oxalic acid mixed with one of titanic acid in hydrochloric acid.

Titanyloxalic acid, H2TiO(C2O4)2.H2O, is obtained in long needles, soluble in water and alcohol, by decomposing its barium salt, BaTiO(C2O4)2.2H2O, with sulphuric acid, and evaporating the resulting solution; the potassium and ammonium salts, K2TiO(C2O4)2.2H2O and (NH4)2TiO(C2O4)2.H2O, have also been obtained crystalline. A peroxidised oxalate of the composition

(TiO2)2(C2O3)2O, or

has been obtained by Mazzucchelli and Pantanelli.


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