Thallium hydride

Thallium hydride
Systematic name

Thallane[1] (substitutive)
Trihydridothallium[1] (additive)
Identifiers
PubChem 139662
ChemSpider 123171 Y
ChEBI CHEBI:30437 Y
Gmelin Reference 362119
Jmol-3D images Image 1
Properties
Molecular formula TlH3
Molar mass 207.4071 g mol-1
Exact mass 207.997887366 g mol-1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Thallium Hydride (Thallane) is a compound composed of Thallium and Hydrogen atoms (TlH3 or TlH). Thallium is the heaviest member of the Group 13 metals, the stability of group 13 metal hydrides decreases with increasing periodic number. This is commonly attributed to poor overlap of the valence metal orbitals with that of the 1s orbital of Hydrogen. Despite encouraging early reports, it is unlikely that a thallium hydride species has been isolated. Thallium hydrides have been observed only in matrix isolation studies, the infrared spectrum was obtained in the gas phase by laser ablation of Thallium in presence of Hydrogen gas.[2] This study confirmed aspects of ab initio calculations conducted by Schwerdtfeger which indicated the similar stability of thallium and indium hydrides.[3] There has not been a confirmed isolation of a thallium hydride complex to date.

References

  1. ^ a b "thallane (CHEBI:30437)". Chemical Entities of Biological Interest. UK: European Bioinformatics Institute. 27 November 2006. Main. http://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:30437. Retrieved 10 October 2011. 
  2. ^ Andrew, L.; Wang, X. (2004). "Infrared Spectra of Thallium Hydrides in Solid Neon, Hydrogen, and Argon.". J. Phys. Chem. A 108: 3396–3402. doi:10.1021/jp0498973. 
  3. ^ Schwerdtfeger, P.; Hunt, P. (1996). "Are the Compounds InH3 and TlH3 Stable Gas Phase or Solid State Species?". Inorg. Chem. 35 (7): 2085–2088. doi:10.1021/ic950411u.