Titanium(IV) nitrate

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Not to be confused with Titanium nitride.
Titanium(IV) nitrate
File:Ti(NO3)4.tif
Names
Other names
titanium tetranitrate, tetranitratotitanium
Identifiers
3D model (JSmol)
ChemSpider
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  • InChI=1S/4NO3.Ti/c4*2-1(3)4;/q4*-1;+4
    Key: QDZRBIRIPNZRSG-UHFFFAOYSA-N
  • [Ti](O[N+]([O-])=O)(O[N+]([O-])=O)(O[N+]([O-])=O)O[N+]([O-])=O
Properties
Ti(NO3)4
Molar mass 295.8866 g/mol
Appearance white volatile solid
Density 2.192[3]
Melting point 58[4] °C (136 °F; 331 K)
Boiling point decompose
Reacts[5]
Structure[6]
monoclinic
P21/C
a = 7.80, b = 13.57, c = 10.34 Å
α = 90°, β = 125·0°, γ = 90°
896.52 Å3
4
8
flattened tetrahedral
Related compounds
Related compounds
 hafnium nitrate, zirconium nitrate, titanium phosphate, titanium perchlorate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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

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Similarly to its original method,[7][8] Ti(NO3)4 is prepared by the nitration of titanium tetrachloride using dinitrogen pentoxide[9] or chlorine nitrate:[10]

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.[11]

Structure

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The complex has D2d symmetry, with four bidentate nitrate ligands. The N-O distances are 1·29 Å and 1·185 Å (noncoordinated).[6]

Physical properties

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In the infrared spectrum, it absorbs strongly at 1635 cm−1, assigned to a N-O vibrational mode.[12]

It is soluble in nonpolar solvents silicon tetrachloride and carbon tetrachloride.[13][8]

Reactions

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Titanium nitrate is hygroscopic, converting to ill-defined hydrates.[14] The anhydrous material is highly reactive, even toward hydrocarbons.[14] Titanium nitrate also reacts with n-dodecane,[15] p-dichlorobenzene, anisole, and biphenyl.[15][16]

It decomposes thermally to titanium dioxide.[17]

References

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  4. ^ Chemistry of the Elements (Second Edition). N. N. Greenwood and A. Earnshaw. P966. 21.3.4 Compounds with oxoanions
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  9. ^ P. Ehrlich "Titanium Tetranitrate" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1237.
  10. ^ Schmeisser, M.; Brandle, K. Acyl nitrates and perchlorates. IV. ClNO3 as starting material for acyl nitrates. Angewandte Chemie, 1957. 69: 781. ISSN: 0044-8249.
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Other reading

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