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Low-Coordinate Magnesium Sulfide and Selenide Complexes.

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This summary is machine-generated.

This study explores magnesium complexes reacting with phosphorus and sulfur compounds, forming novel phosphinate and chalcogenide complexes. These reactions reveal insights into the structure and bonding of magnesium-chalcogenide units.

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Area of Science:

  • Organometallic Chemistry
  • Main Group Chemistry
  • Coordination Chemistry

Background:

  • The reactivity of low-coordinate magnesium complexes is crucial for understanding fundamental chemical principles.
  • Exploring new synthetic routes to magnesium-chalcogenide compounds expands the scope of main group chemistry.

Purpose of the Study:

  • To investigate the reactions of a dimeric magnesium complex with various phosphorus and sulfur-containing reagents.
  • To synthesize and characterize novel phosphinate and chalcogenide complexes of magnesium.
  • To elucidate the structural and electronic properties of the resulting magnesium-chalcogenide frameworks.

Main Methods:

  • Reaction of [{(iPrDipNacNac)Mg}2] with Ph3P═O, Ph3P═S, Ph3P═Se, and N-heterocyclic carbene-sulfides.
  • Characterization of products using spectroscopic techniques, X-ray crystallography, and Density Functional Theory (DFT) calculations.
  • Investigation of solution and solid-state properties of the synthesized complexes.

Main Results:

  • Formation of a phosphinate complex [(iPrDipNacNac)Mg(OPPh3)(OPPh2)] from reaction with Ph3P═O.
  • Synthesis of low-coordinate chalcogenide complexes [{(iPrDipNacNac)Mg}2(μ-S)] and [{(iPrDipNacNac)Mg}2(μ-Se)] from reactions with Ph3P═S and Ph3P═Se.
  • Generation of NHC adducts of magnesium sulfide complexes and a magnesium-sulfur-azide complex.

Conclusions:

  • The dimeric magnesium complex serves as a versatile precursor for synthesizing diverse magnesium-chalcogenide compounds.
  • The study provides detailed insights into the bonding and structure of ionic Mg-E-Mg units.
  • DFT calculations complement experimental data, offering a deeper understanding of the electronic structure.