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Researchers synthesized novel cyclic chlorostannylenes from dipotassio-tetrasilan-1,4-diide and tin(II) chloride. These compounds were further modified and characterized, revealing insights into their Lewis basicity and reactivity.

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density functional calculationsmain group elementsoligosilanesstannylenesstannylenoids

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Area of Science:

  • Organometallic Chemistry
  • Silicon-Tin Chemistry
  • Coordination Chemistry

Background:

  • Dipotassio-tetrasilan-1,4-diide serves as a precursor for novel silicon-containing compounds.
  • Tin(II) chloride is a versatile reagent in synthesizing organotin compounds.

Purpose of the Study:

  • To synthesize and characterize novel cyclic chlorostannylenes.
  • To investigate the Lewis basicity of synthesized stannylenes.
  • To explore the reactivity of these compounds with metal carbonyls.

Main Methods:

  • Low-temperature reaction of dipotassio-tetrasilan-1,4-diide with SnCl2.
  • Cation exchange reactions using Na2[B12Cl12] and Li[Al(OC(CF3)3)4].
  • Density Functional Theory (DFT) calculations and Nuclear Magnetic Resonance (NMR) spectroscopy.
  • Synthesis of iron carbonyl complexes.

Main Results:

  • Formation of a five-membered cyclic potassio chlorostannate(II).
  • Synthesis of sodium chlorostannylenoid and a non-stabilized cyclic bissilylstannylene.
  • Analysis confirmed increasing Lewis basicity of the bissilylstannylene.
  • Successful synthesis of iron carbonyl complexes from the chlorostannate and stannylene.

Conclusions:

  • Novel cyclic chlorostannylenes and bissilylstannylenes were successfully synthesized.
  • The electronic properties, specifically Lewis basicity, were elucidated.
  • The reactivity of these tin compounds was demonstrated through complex formation.