Titanium(IV) nitrate
# 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.

