Barium iodide

Quality 0.50 · 1 view · Updated 2 months ago

title: "Barium iodide" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["iodides", "barium-compounds", "alkaline-earth-metal-halides"] topic_path: "general/iodides" source: "https://en.wikipedia.org/wiki/Barium_iodide" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 455115611 | Name = Barium iodide | ImageFile1 = Cotunnite structure.png | Reference = | last = Lide | first = David R. | year = 1998 | title = Handbook of Chemistry and Physics | edition = 87 | location = Boca Raton, FL | publisher = CRC Press | isbn = 0-8493-0594-2 | pages = 4–44}} | IUPACName = Barium iodide | OtherNames = Barium iodide, anhydrous |Section1={{Chembox Identifiers | PubChem = 83684 | ChemSpiderID_Ref = | ChemSpiderID = 75507 | SMILES = I[Ba]I | SMILES2 = [Ba+2].[I-].[I-] | InChI = 1/Ba.2HI/h;21H/q+2;;/p-2 | InChIKey = SGUXGJPBTNFBAD-NUQVWONBAS | StdInChI_Ref = | StdInChI = 1S/Ba.2HI/h;21H/q+2;;/p-2 | StdInChIKey_Ref = | StdInChIKey = SGUXGJPBTNFBAD-UHFFFAOYSA-L | CASNo_Ref = | CASNo = 13718-50-8 | CASNo_Comment = (anhydrous) | CASNo2_Ref = | CASNo2 = 7787-33-9 | CASNo2_Comment = (dihydrate) | CASNo3_Ref = | CASNo3 = 13477-15-1 | CASNo3_Comment = (hexahydrate) | UNII_Ref = | UNII = WKC4T7680A | RTECS = | EINECS = 237-276-9 |Section2={{Chembox Properties | Formula = BaI2 (anhydrous) BaI2·2H2O (dihydrate) | MolarMass = 391.136 g/mol (anhydrous) 427.167 g/mol (dihydrate) | Appearance = White orthorhombic crystals (anhydrous) colorless crystals (dihydrate) | Odor = odorless | Density = 5.15 g/cm3 (anhydrous) 4.916 g/cm3 (dihydrate) | Solubility = 166.7 g/100 mL (0 °C) 221 g/100 mL (20 °C) 246.6 g/100 mL (70 °C) | MeltingPtC = 711 | MeltingPt_notes = (anhydrous) decomposes at 740 °C (dihydrate) | BoilingPt = | pKa = | pKb = | Viscosity = | SolubleOther = soluble in ethanol, acetone | MagSus = −124.0·10−6 cm3/mol |Section3={{Chembox Structure | MolShape = | Coordination = | CrystalStruct = PbCl2-type (Orthorhombic oP12) | SpaceGroup = Pnma (No. 62) | Dipole = |Section4={{Chembox Thermochemistry | DeltaHf = −602.1 kJ·mol−1 | DeltaHc = | Entropy = | HeatCapacity = |Section7={{Chembox Hazards | ExternalSDS = | MainHazards = toxic | FlashPt = |Section8={{Chembox Related | OtherAnions = barium fluoride barium chloride barium bromide | OtherCations = beryllium iodide magnesium iodide calcium iodide strontium iodide | OtherFunction_label = | OtherFunction = | OtherCompounds =

Barium iodide is an inorganic compound with the formula BaI2. The compound exists as an anhydrous and a hydrate (BaI2(H2O)2), both of which are white solids. When heated, hydrated barium iodide converts to the anhydrous salt. The hydrated form is freely soluble in water, ethanol, and acetone.

Structure

The structure of the anhydrous form resembles that of lead(II) chloride with each Ba center bound to nine iodide ligands and has a crystalline packing structure that is quite similar to BaCl2.

Reactions

Anhydrous BaI2 can be prepared by treating Ba metal with 1,2-diiodoethane in ether.

BaI2 reacts with alkyl potassium compounds to form organobarium compounds.

BaI2 can be reduced with lithium biphenyl, to give a highly active form of barium metal.

Safety

Like other soluble salts of barium, barium iodide is toxic.

References

References

  1. Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. {{ISBN. 0-19-855370-6.
  2. Brackett, E. B.; Brackett, T. E.; Sass, R. L.; The Crystal Structures of Barium Chloride, Barium Bromide, and Barium Iodide. J. Phys. Chem., 1963, volume 67, 2132 – 2135
  3. Duval, E.; Zoltobroda, G.; Langlois, Y.; A new preparation of BaI2: application to (Z)-enol ether synthesis. Tetrahedron Letters, 2000, 41, 337-339
  4. Walter, M. D.; Wolmershauser, G.; Sitzmann, H.; Calcium, Strontium, Barium, and Ytterbium Complexes with Cyclooctatetraenyl or Cyclononatetraenyl Ligands. J. Am. Chem. Soc., 2005, 127 (49), 17494 – 17503.
  5. Yanagisawa, A.; Habaue, S.; Yasue, K.; Yamamoto, H.; Allylbarium Reagents: Unprecedented Regio- and Stereoselective Allylation Reactions of Carbonyl Compounds. J. Am. Chem. Soc.1994, 116,6130-6141

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

iodidesbarium-compoundsalkaline-earth-metal-halides