Indium(III) bromide explained

Indium(III) bromide, (indium tribromide), InBr3, is a chemical compound of indium and bromine. It is a Lewis acid and has been used in organic synthesis.[1]

Structure

It has the same crystal structure as aluminium trichloride, with 6 coordinate indium atoms.[2] When molten it is dimeric, In2Br6, and it is predominantly dimeric in the gas phase. The dimer has bridging bromine atoms with a structure similar to dimeric aluminium trichloride Al2Cl6.[2]

Preparation and reactions

It is formed by the reaction of indium and bromine.[3] InBr3 forms complexes with ligands, L, InBr3L, InBr3L2, InBr3L3.[2]

Reaction with indium metal forms lower valent indium bromides, InBr2, In4Br7, In2Br3, In5Br7, In7Br9, indium(I) bromide.[4] [5] [6] [7] In refluxing xylene solution InBr3 and In metal react to form InBr2.[8]

External links

Notes and References

  1. Thirupathi. Ponnaboina. Kim. Sung Soo. InBr3: A Versatile Catalyst for the Different Types of Friedel−Crafts Reactions. The Journal of Organic Chemistry. 74. 20. 2009. 7755–7761. 0022-3263. 10.1021/jo9014613. 19813765.
  2. "Indium: Inorganic chemistry", D.G Tuck, Encyclopedia of Inorganic Chemistry Editor R Bruce King (1994) John Wiley and Sons
  3. Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier
  4. Staffel. Thomas. Meyer. Gerd. The mono-, sesqui-, and dibromides of indium: InBr, In2Br3, and InBr2. Zeitschrift für anorganische und allgemeine Chemie. 552. 9. 1987. 113–122. 0044-2313. 10.1002/zaac.19875520913.
  5. Ruck. Michael. Bärnighausen. Hartmut. Zur Polymorphie von In5Br7. Zeitschrift für anorganische und allgemeine Chemie. 625. 4. 1999. 577–585. 0044-2313. 10.1002/(SICI)1521-3749(199904)625:4<577::AID-ZAAC577>3.0.CO;2-B.
  6. Dronskowski. R.. The crystal structure of In7Br9. Zeitschrift für Kristallographie. 210. 12. 1995. 920–923. 0044-2968. 10.1524/zkri.1995.210.12.920. 1995ZK....210..920D .
  7. Stephenson. NC. Mellor. DP. The Crystal Structure of Indium Monobromide. Australian Journal of Chemistry. 3. 4. 1950. 581. 0004-9425. 10.1071/CH9500581. 1950AuSRA...3..581S .
  8. Freeland. B. H.. Tuck. D. G.. Facile synthesis of the lower halides of indium. Inorganic Chemistry. 15. 2. 1976. 475–476. 0020-1669. 10.1021/ic50156a050.

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