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A Crystalline In(II) Hydride.

Olympia Mouriki1, Graham J Tizzard2, Simon J Coles2

  • 1Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, Shepherds Bush, London W12 0BZ, U.K.

Journal of the American Chemical Society
|January 30, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Researchers synthesized the first stable indium(II) hydride, a key advance for heavier main-group element chemistry. This breakthrough opens new possibilities for catalysis and small-molecule activation using novel hydride compounds.

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Area of Science:

  • Inorganic Chemistry
  • Main-Group Chemistry
  • Organometallic Chemistry

Background:

  • Low oxidation state hydrides of heavier main-group elements are typically unstable.
  • These compounds are valuable for small-molecule activation and catalysis.

Purpose of the Study:

  • To synthesize and characterize the first stable, low oxidation state indium hydride.
  • To investigate the stability and reactivity of this novel indium hydride species.

Main Methods:

  • Synthesis of indium hydride using bis(N-heterocyclic carbene)borate ligands.
  • Characterization via NMR spectroscopy, FT-IR, and single-crystal X-ray diffraction.
  • Computational calculations to understand stability and bonding.

Main Results:

  • Successful synthesis of a stable, crystalline indium(II) hydride with a covalent In-In bond.
  • Comprehensive characterization confirmed the compound's structure and stability.
  • Preliminary studies showed the In(II) hydride acts as a nucleophile.

Conclusions:

  • This work reports the first stable low oxidation state indium hydride.
  • The compound's stability is attributed to specific structural and electronic features.
  • This discovery expands the scope of p-block element hydrides for chemical transformations.