title: Titanium(IV) nitrate
text: # Titanium(IV) nitrate
  
  Titanium nitrate is the inorganic compound with formula $Ti(NO_3)_4.$ It is a colorless, diamagnetic solid that sublimes readily. It is an unusual example of a volatile binary transition metal nitrate. Ill defined species called titanium nitrate are produced upon dissolution of titanium or its oxides in nitric acid.
  
  ## Preparation
  
  Similarly to its original method, $Ti(NO_3)_4$ is prepared by the nitration of titanium tetrachloride using dinitrogen pentoxide or chlorine nitrate:
  
      $TiCl_4$ + 4 $N_2O_5$ → $Ti(NO_3)_4$ + 4 $ClNO_2$
  
  Hydrated titanium nitrate, the nitrate salt of the aquo complex $[Ti(H_2O)_6]^{3+},$ is produced upon dissolution of titanium compounds in nitric acid.
  
  ## Structure
  
  The complex has $D_{2d}$ symmetry, with four bidentate nitrate ligands. The N-O distances are 1·29 Å and 1·185 Å (noncoordinated).
  
  ## Physical properties
  
  In the infrared spectrum, it absorbs strongly at 1635 $cm^{−1},$ assigned to a N-O vibrational mode.
  
  It is soluble in nonpolar solvents silicon tetrachloride and carbon tetrachloride.
  
  ## Reactions
  
  Titanium nitrate is hygroscopic, converting to ill-defined hydrates. The anhydrous material is highly reactive, even toward hydrocarbons. Titanium nitrate also reacts with n-dodecane, p-dichlorobenzene, anisole, biphenyl,
  
  It decomposes thermally to titanium dioxide.
  
  