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Donor-Acceptor Stabilized Tetra(silanimine).

Yu-Liang Shan1, Bi-Xiang Leong1, Yongxin Li1

  • 1Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 637371 Singapore.

Inorganic Chemistry
|January 18, 2017
PubMed
Summary
This summary is machine-generated.

This study details the synthesis of oligo(silanimine) compounds through reactions involving silylenes and silicon tetraiodide. New silanimine structures were created and characterized, expanding silicon-nitrogen chemistry.

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Area of Science:

  • Organosilicon Chemistry
  • Inorganic Synthesis
  • Materials Science

Background:

  • Silanimines, characterized by the >Si=N- linkage, are important in silicon-nitrogen chemistry.
  • The synthesis of complex silanimine structures remains a challenge in organosilicon chemistry.
  • Understanding reaction mechanisms is crucial for developing new synthetic routes.

Purpose of the Study:

  • To describe the synthesis of a novel oligo(silanimine).
  • To investigate the reaction mechanism between an amidinato silylene and silicon tetraiodide.
  • To characterize the resulting silanimine compounds using spectroscopic and crystallographic methods.

Main Methods:

  • Reaction of amidinato silylene [LSiN(SiMe3)2] with silicon tetraiodide (SiI4).
  • Mechanistic studies involving isolation and characterization of intermediates.
  • Further reactions of synthesized silanimines with lithium amide reagents and potassium graphite (KC8).
  • Characterization using Nuclear Magnetic Resonance (NMR) spectroscopy and X-ray crystallography.

Main Results:

  • Synthesis of silanimine [LSi(I)NSiI3] (2) from the reaction of [LSiN(SiMe3)2] (1) and SiI4.
  • Elucidation of a reaction mechanism involving silyl ionic intermediates and elimination of trimethylsilyl iodide (SiMe3I).
  • Formation of a donor-acceptor stabilized tetra(silanimine) [LSiN(SiMe3)SiNAr]2 (7) containing four formal silanimine units.
  • Structural confirmation of compounds 2, 6, and 7 via NMR and X-ray diffraction.

Conclusions:

  • The study successfully synthesized novel oligo(silanimine) structures.
  • A detailed mechanistic pathway for the formation of silanimines from silylenes and SiI4 was proposed.
  • The characterized compounds provide new insights into silicon-nitrogen bonding and reactivity.