Indium(III) nitrate

Indium(III) nitrate is a nitrate salt of indium which forms various hydrates. Only the pentahydrate has been crystallographically verified. Other hydrates are also reported in literature, such as the trihydrate.[1][2][3]

Indium(III) nitrate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.979
EC Number
  • anhydrous: 237-393-5
RTECS number
  • anhydrous: NL1750000
UNII
  • InChI=1S/In.3NO3/c;3*2-1(3)4/q+3;3*-1
    Key: LKRFCKCBYVZXTC-UHFFFAOYSA-N
  • monohydrate: InChI=1S/In.3NO3.H2O/c;3*2-1(3)4;/h;;;;1H2/q+3;3*-1;
    Key: YZZFBYAKINKKFM-UHFFFAOYSA-N
  • trihydrate: InChI=1S/In.3NO3.3H2O/c;3*2-1(3)4;;;/h;;;;3*1H2/q+3;3*-1;;;
    Key: HVDZMISZAKTZFP-UHFFFAOYSA-N
  • tetrahydrate: InChI=1S/In.3NO3.4H2O/c;3*2-1(3)4;;;;/h;;;;4*1H2/q+3;3*-1;;;;
    Key: ZYYDOSLSINDXIQ-UHFFFAOYSA-N
  • anhydrous: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[In+3]
  • monohydrate: [N+](=O)([O-])O[In](O[N+](=O)[O-])O[N+](=O)[O-].O
  • trihydrate: [N+](=O)([O-])O[In](O[N+](=O)[O-])O[N+](=O)[O-].O.O.O
  • tetrahydrate: [N+](=O)([O-])O[In](O[N+](=O)[O-])O[N+](=O)[O-].O.O.O.O
Properties
In(NO3)3
Molar mass 300.83 g/mol
Appearance White solid
Density 2.43 g/cm3 (pentahydrate)[1]
Melting point 100 °C (212 °F; 373 K) (decomposes, hydrate)
Soluble
Structure[1]
Monoclinic
C2/c
a = 10.35 Å, b = 9.17 Å, c = 11.25 Å
α = 90°, β = 91.05°, γ = 90°
1068 Å3
Hazards
GHS labelling:
GHS03: OxidizingGHS07: Exclamation mark
Warning
H272, H315, H319, H335
P210, P220, P221, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Production and reactions

Indium(III) nitrate hydrate is produced by the dissolution of indium metal in concentrated nitric acid followed by evaporation of the solution:[1][2][3]

In + 4 HNO3 → In(NO3)3 + NO + 2 H2O

The hydrate first decomposes to a basic salt and then to indium(III) oxide at 240 °C. Anhydrous indium(III) nitrate is claimed to be produced by the reaction of anhydrous indium(III) chloride and dinitrogen pentoxide.[2][4]

In the presence of excess nitrate ions, indium(III) nitrate converts to the [In(NO3)4]- ion.[1][2]

The hydrolysis of indium(III) nitrate yields indium(III) hydroxide. It also reacts with sodium tungstate to form In(OH)WO4, [In(OH)2]2WO4, NaInWO4 or In2(WO4)3 depending on pH.[5][6]

Structure

Only the pentahydrate has been structurally elucidated. The pentahydrate consists of octahedral [In(NO3)(H2O)5]2+ centers as well as two nitrates and is monoclinic.[1]

References
  1. M. A. Malyarik; S. P. Petrosyants; A. B. Ilyukhin; Yu. A. Buslaev (1993). "Polyfunctionality of the nitrate group, coordination numbers of trivalent indium in nitrates complexes, and crystal structures of [In(NO3)(H2O)5](NO3)2 and HK6[In(NO3)4(H2O)2]3(NO3)4". Russian Journal of Inorganic Chemistry. 38 (12): 1849–1854. ISSN 0036-0236.
  2. D. G. Tuck; E. J. Woodhouse; P. Carty (1966). "Co-ordination compounds of indium. Part III. Indium(III) nitrate species". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 1077–1080. doi:10.1039/J19660001077.
  3. Galina V. Kozhevnikova; Gábor Keresztury (1985). "The state of indium ions in nitrate solutions: A Raman spectroscopic study". Inorganica Chimica Acta. 98 (1): 59–65. doi:10.1016/S0020-1693(00)90751-5.
  4. B. O. Field; C. J. Hardy (1964). "Volatile and anhydrous nitrato-complexes of metals: preparation by the use of dinitrogen pentroxide, and measurement of infrared spectra". Journal of the Chemical Society: 4428–4434. doi:10.1039/JR9640004428.
  5. Keita Yura; Karl C. Fredrikson; Egon Matijević (1990). "Preparation and properties of uniform colloidal indium compounds of different morphologies". Colloids and Surfaces. 50: 281–293. doi:10.1016/0166-6622(90)80270-E.
  6. Shcherbina, K. G.; Mokhosoev, M. V.; Gruba, A. I. Reaction of aluminum and indium nitrates with sodium tungstate in hot solutions [in Russian]. Zhurnal Neorganicheskoi Khimii, 1974. 19 (2): 396-399. ISSN 0044-457X.
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