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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
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Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
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Related Experiment Video

Updated: Aug 4, 2025

The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique
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Phosphanyl-substituted tin half-sandwich complexes.

Carsten Müller1, Justin Schu1, Bernd Morgenstern1

  • 1Faculty of Natural Sciences and Technology, Department of Chemistry, Saarland University 66123 Saarbrücken Germany andre.schaefer@uni-saarland.de.

RSC Advances
|April 3, 2023
PubMed
Summary
This summary is machine-generated.

New phosphanyl-substituted tin(II) complexes form head-to-tail dimers due to Lewis acidic tin and basic phosphorus centers. Their properties and reactivities were explored experimentally and theoretically, with related transition metal complexes also presented.

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Area of Science:

  • Organometallic Chemistry
  • Main Group Chemistry

Background:

  • Tin(II) complexes with phosphorus ligands are of interest due to potential Lewis acidity/basicity.
  • Half sandwich complexes offer unique coordination environments.

Purpose of the Study:

  • To synthesize and characterize novel phosphanyl-substituted tin(II) half sandwich complexes.
  • To investigate the self-assembly and dimerization behavior of these complexes.
  • To explore the reactivity and electronic properties of the tin complexes and their transition metal analogues.

Main Methods:

  • Synthesis of phosphanyl-substituted tin(II) precursors.
  • X-ray crystallography for structural determination.
  • Spectroscopic analyses (NMR, IR) and theoretical calculations (DFT) to study properties and reactivity.

Main Results:

  • Successful synthesis of phosphanyl-substituted tin(II) half sandwich complexes.
  • Observation of head-to-tail dimerization driven by Lewis acid-base interactions between tin and phosphorus centers.
  • Detailed characterization of the electronic structure and bonding within the dimers.
  • Exploration of the coordination chemistry with transition metals.

Conclusions:

  • Phosphanyl-substituted tin(II) complexes exhibit unique dimerization behavior due to inherent Lewis acidity and basicity.
  • The electronic and structural properties can be tuned through ligand design.
  • These complexes serve as versatile building blocks for more complex organometallic structures.