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Terminal hydridozinc cation.

Raju Chambenahalli1, Alex P Andrews, Florian Ritter

  • 1School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, India. venugopal@iisertvm.ac.in.

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|January 29, 2019
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Summary
This summary is machine-generated.

Researchers isolated a stable hydridozinc cation, showcasing the hydride ligand's nucleophilicity through facile insertion reactions. This cation can selectively reduce carbon dioxide to a formate ester in catalytic hydrosilylation.

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Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Catalysis

Background:

  • Stable metal-hydride complexes are crucial in catalysis.
  • Understanding the reactivity of terminal metal-hydride bonds is essential for developing new synthetic methodologies.

Purpose of the Study:

  • To isolate and characterize a thermally stable terminal hydridozinc cation.
  • To investigate the nucleophilicity of the hydride ligand in the hydridozinc cation.
  • To explore the catalytic potential of the hydridozinc cation in reduction reactions.

Main Methods:

  • Isolation and characterization of the hydridozinc cation.
  • Reactions with carbon dioxide, carbodiimide, and benzophenone to demonstrate nucleophilicity.
  • Catalytic hydrosilylation studies using phenylsilane (PhSiH3) and triphenylborane (BPh3) as a co-catalyst.

Main Results:

  • A thermally stable terminal hydridozinc cation was successfully isolated.
  • The hydride ligand exhibited significant nucleophilicity, readily undergoing insertion reactions with CO2, carbodiimide, and benzophenone.
  • In catalytic hydrosilylation, the hydridozinc cation in the presence of BPh3 selectively reduced CO2 to phenyl silyl formate (PhSi(OCHO)3).

Conclusions:

  • The isolated hydridozinc cation is a stable and versatile reagent.
  • The nucleophilic hydride ligand enables facile functionalization across the Zn-H bond.
  • The hydridozinc cation shows promise as a catalyst for selective CO2 reduction.