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Related Experiment Videos

Gold(I) phosphido complexes: synthesis, structure, and reactivity.

Diana M Stefanescu1, Holming F Yuen, David S Glueck

  • 16128 Burke Laboratory, Department of Chemistry and Dartmouth Molecular Materials Group, Dartmouth College, Hanover, New Hampshire 03755, USA.

Inorganic Chemistry
|December 23, 2003
PubMed
Summary
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This study synthesizes novel gold(I) phosphido complexes, [Au(PR(2))](n)(), revealing oligomeric ring structures in solution and solid states. Further reactions explore their diverse chemical reactivity.

Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Inorganic Synthesis

Background:

  • Gold(I) phosphine complexes are versatile precursors in organometallic chemistry.
  • Understanding the structural diversity and reactivity of gold phosphido complexes is crucial for developing new catalytic and materials applications.
  • Previous studies have explored related gold-phosphine and gold-phosphide systems, but oligomeric phosphido complexes remain less characterized.

Purpose of the Study:

  • To synthesize and characterize novel gold(I) phosphido complexes derived from phosphine precursors.
  • To investigate the solution behavior and solid-state structures of these gold phosphido complexes.
  • To explore the reactivity of gold phosphido complexes with various electrophilic and nucleophilic reagents.

Main Methods:

Related Experiment Videos

  • Synthesis of gold(I) phosphido complexes via deprotonation of gold(I) phosphine complexes with aqueous ammonia.
  • Characterization using (31)P NMR spectroscopy to determine solution behavior and oligomeric state.
  • X-ray crystallography to elucidate the solid-state structures and conformations of specific oligomers.
  • Reactions with electrophilic reagents (HI, I(2), ArSH) and other gold complexes (PPN[AuCl(2)]) to explore reactivity.

Main Results:

  • Successfully synthesized a series of gold(I) phosphido complexes, [Au(PR(2))](n)(), with various phosphine ligands.
  • (31)P NMR spectroscopy indicated the formation of oligomeric mixtures in solution, likely cyclic structures.
  • X-ray crystallography confirmed the presence of discrete oligomeric rings of varying sizes (n=3-6) and conformations for complexes 1-4.
  • Reactions with PPN[AuCl(2)] yielded bridged gold complexes, while reactions with electrophiles and nucleophiles afforded monomeric gold(I) complexes with different ligand environments.

Conclusions:

  • The deprotonation of gold(I) phosphine complexes provides a viable route to diverse gold(I) phosphido complexes.
  • These phosphido complexes exhibit a propensity to form oligomeric rings in solution and in the solid state, with structural diversity dependent on the phosphine ligand.
  • The synthesized gold phosphido complexes demonstrate versatile reactivity, enabling the formation of new gold complexes with varied bonding motifs.