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A square planar silylene nickel four-membered ring.

Sebastian Kaufmann1, Ralf Köppe1, Peter W Roesky1

  • 1Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany. roesky@kit.edu.

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A novel nickel silylene complex with a unique square planar silicon-nickel ring was synthesized. This study offers insights into the bonding characteristics of this new organometallic compound.

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Area of Science:

  • Organometallic Chemistry
  • Silicon Chemistry
  • Nickel Complexes

Background:

  • Silylenes are silicon analogues of carbenes with diverse reactivity.
  • Nickel complexes are crucial in catalysis and materials science.
  • Understanding Si-Ni bonding is key to developing new inorganic materials.

Purpose of the Study:

  • To synthesize and characterize a novel nickel silylene complex.
  • To investigate the structural and electronic properties of the Si-Ni ring.
  • To explore the bonding situation within the four-membered Si-Ni ring.

Main Methods:

  • Synthesis of the nickel silylene complex using a Ni(0) precursor and a silylene.
  • Analytical characterization including mass spectrometry, IR, and Raman spectroscopy.
  • Quantum chemical calculations to elucidate bonding.

Main Results:

  • The new nickel silylene complex [PhC(NtBu)2SiNi(C5Me5)]2 was successfully synthesized.
  • A square planar central ring motif comprising two silicon and two nickel atoms was identified.
  • Quantum chemical calculations provided insights into the Si-Ni bonding interactions.

Conclusions:

  • The successful synthesis of this nickel silylene complex expands the scope of known organosilicon and organonickel compounds.
  • The study provides valuable data on the electronic structure and bonding in Si-Ni systems.
  • This work may pave the way for new applications in catalysis or materials science.