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The shape of molybdenum hydride VI

The molecular geometry of molybdenum hydride VI

Molybdenum hydride VI (chemical formula MoH₆) is a unstable volatile gas. Because of the high radius of molybdenum it quickly breaks down when it is not under pressure.

Structure

It is known to have a distorted trigonal prism structure. This structure follows the VSEPR Theory.

Properties

It is one of the components in which molybdenum has the maximum oxidation number +6 and having similar properties to H₂Mo or H₂S. It can be used as a oxidation agent in redox reactions.

Molybdenum hydride VI is an acidic hydride , because it manifests amphoteric properties. In reaction with most alkaline bases forms stable complexes.

Synthesis

Laser-ablated molybdenum atoms react with hydrogen gas upon condensation in excess argon and neon. Molybdenum gets oxidized by hydrogen till the maximum oxidation grade.

2Mo + H₂ ^(hv)→ 2MoH (+∆H)

2MoH + H₂ ^(hv)→ 2H₂Mo (+∆H)

H₂Mo + H₂ ^(hv)→ MoH₄ (+∆H)

H₂ + MoH₄ ^(hv)→ MoH₆ (+∆H)

References

https://pubs.acs.org/doi/10.1021/jp053591u