Uranium(IV) hydride

{{short description|Metal hydride composed of uranium and hydrogen}}

{{for|the uranium hydrogen alloy|Uranium hydride}}

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Uranium(IV) hydride is a chemical compound with the chemical formula UH{{sub|4}}, a metal hydride.

In 1997, Souter et al. reported the production of UH{{sub|4}} reacting laser ablated uranium atoms with dihydrogen and capturing the product on solid argon. The assignment of the structure was made using infrared spectroscopic evidence supported by DFT calculations.{{cite journal|last=Souter|first=Philip F.|author2=Kushto, Gary P. |author3=Andrews, Lester |author4= Neurock, Matthew |title=Experimental and Theoretical Evidence for the Formation of Several Uranium Hydride Molecules|journal=Journal of the American Chemical Society|year=1997|volume=119|issue=7|pages=1682–1687|doi=10.1021/ja9630809}} Uranium(IV) hydride has a quasi-tetrahedral (C{{sub|s}}) structure. UH{{sub|4}} is formed by the successive insertion of uranium into two hydrogen molecules:

:U + H{{sub|2}} → UH{{sub|2}}

:UH{{sub|2}} + H{{sub|2}} → UH{{sub|4}}

Further reaction with hydrogen, only produces dihydrogen complexes: UH{{sub|4}}(H{{sub|2}}){{sub|n}} (1 ≤ n ≤ 6).{{cite journal|last=Raab|first=Juraj|author2=Lindh, Roland H. |author3=Wang, Xuefeng |author4=Andrews, Lester |author5= Gagliardi, Laura |title=A Combined Experimental and Theoretical Study of Uranium Polyhydrides with New Evidence for the Large Complex UH{{sub|4}}(H{{sub|2}}){{sub|6}}|journal=The Journal of Physical Chemistry A|year=2007|volume=111|issue=28|pages=6383–6387|doi=10.1021/jp0713007|pmid=17530832|url=http://archive-ouverte.unige.ch/unige:3194|bibcode=2007JPCA..111.6383R}}