Titanium nitrate is the inorganic compound with formula Ti(NO3)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(NO3)4 is prepared by the nitration of titanium tetrachloride using dinitrogen pentoxideP. Ehrlich "Titanium Tetranitrate" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1237. or chlorine nitrate:Schmeisser, M.; Brandle, K. Acyl nitrates and perchlorates. IV. ClNO3 as starting material for acyl nitrates. Angewandte Chemie, 1957. 69: 781. ISSN: 0044-8249. TiCl4 + 4 N2O5 → Ti(NO3)4 + 4 ClNO2
Hydrated titanium nitrate, the nitrate salt of the aquo complex [Ti(H2O)6]3+, is produced upon dissolution of titanium compounds in nitric acid.
Structure The complex has D2d 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, and biphenyl.
It decomposes thermally to titanium dioxide.
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