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A Three-Membered Cyclic Phosphasilene.

Yannic Heider1, Philipp Willmes1, Daniel Mühlhausen1

  • 1Krupp-Lehrstuhl für Allgemeine und Anorganische Chemie, Universität des Saarlandes, Campus, C4.1, 66123, Saarbrücken, Germany.

Angewandte Chemie (International Ed. in English)
|December 15, 2018
PubMed
Summary
This summary is machine-generated.

Researchers synthesized the smallest cyclic phosphasilene, stabilized by an N-heterocyclic carbene (NHC). This novel compound demonstrates potential as a ligand and reveals the P=Si double bond

Keywords:
coordination chemistryheavier multiple bondsphosphorussiliconsmall rings

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Area of Science:

  • Organophosphorus Chemistry
  • Organosilicon Chemistry
  • Coordination Chemistry

Background:

  • Small unsaturated phosphacycles are valuable due to ring strain and reactive functional groups.
  • The synthesis of novel phosphorus-silicon ring systems remains an active area of research.

Purpose of the Study:

  • To synthesize and isolate the smallest possible cyclic phosphasilene.
  • To characterize its stability and reactivity, particularly when complexed with an N-heterocyclic carbene (NHC).

Main Methods:

  • Synthesis of a cyclic phosphasilene stabilized by an N-heterocyclic carbene (NHC).
  • Spectroscopic characterization of the resulting adduct.
  • Reactivity studies involving complexation with an iron fragment and reaction with BPh3.

Main Results:

  • Successful synthesis and isolation of the smallest cyclic phosphasilene as an NHC adduct.
  • The phosphasilene-NHC adduct acts as a ligand to a Fe(CO)4 fragment through the phosphorus lone pair.
  • NHC abstraction by BPh3 leads to dimerization of the PSi2 unit, indicating the P=Si double bond's availability for further reactions.

Conclusions:

  • The smallest cyclic phosphasilene can be synthesized and stabilized as an NHC adduct.
  • This system exhibits interesting coordination chemistry and reactivity, highlighting the utility of the P=Si double bond for further synthetic transformations.