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Updated: Jun 18, 2025

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
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A Paramagnetic Nickel-Zinc Hydride Complex.

Marina Perez-Jimenez1, Blaise L Geoghegan1, Alberto Collauto1

  • 1Department of Chemistry and Centre for Pulse EPR spectroscopy (PEPR), Imperial College London, 82 Wood Lane, Shepherds Bush, London, W12 0BZ, UK.

Angewandte Chemie (International Ed. in English)
|July 30, 2024
PubMed
Summary
This summary is machine-generated.

A novel nickel-zinc hydride complex was synthesized, revealing a unique bridging hydride interaction. This discovery facilitates the activation and functionalization of zinc-hydride bonds using nickel catalysis.

Keywords:
EPR spectroscopyNickelZincdehydrocouplingheterometallics

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Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Catalysis

Background:

  • Zinc-hydride compounds are valuable synthetic intermediates.
  • Nickel complexes are widely used in catalysis.
  • Understanding metal-metal hydride interactions is crucial for catalytic mechanisms.

Purpose of the Study:

  • To synthesize and characterize a novel nickel-zinc hydride complex.
  • To investigate the reactivity and catalytic potential of zinc-hydride bonds mediated by nickel.
  • To elucidate the nature of the Ni-H-Zn interaction.

Main Methods:

  • Reaction of a molecular zinc-hydride with a nickel precursor.
  • Single crystal X-ray diffraction for solid-state structural analysis.
  • Density Functional Theory (DFT) calculations for electronic structure.
  • Electron Paramagnetic Resonance (EPR) spectroscopy for solution behavior.

Main Results:

  • Isolation and characterization of a nickel-zinc hydride complex with a bridging 3-center, 2-electron Ni-H-Zn bond.
  • DFT calculations support a sigma-complex formulation involving a nickel(I) fragment.
  • EPR studies indicate lability in solution.
  • Demonstration of H/D exchange and dehydrocoupling of zinc-hydride bonds catalyzed by nickel(I).

Conclusions:

  • The study successfully synthesized and characterized a unique nickel-zinc hydride complex.
  • The findings highlight the ability of nickel(I) centers to activate zinc-hydride bonds.
  • This work provides insights into nickel-catalyzed functionalization of zinc-hydride bonds.