Preparation of a high-coordinated-silicon-centered spiro-cyclic compound

Area of Science:

• Inorganic Chemistry
• Organosilicon Chemistry
• Materials Science

Background:

• Silicon compounds with silicon-silicon bonds exhibit unique reactivity due to unusual oxidation states.
• Synthesizing these reactive silicon compounds necessitates robust and resilient strategies.
• Understanding the bonding in silicon-silicon interactions is crucial for developing new materials.

Purpose of the Study:

• To report the successful synthesis of a novel silicon-based spirocyclic compound.
• To characterize a compound featuring a hyper-valent silicon atom and a silicon-silicon bond.
• To elucidate the electronic nature of the silicon-silicon bond through computational methods.

Main Methods:

• Synthesis of a silicon-based spirocyclic compound.
• Computational chemistry techniques, including Natural Bond Orbital (NBO) analysis.
• Energy Decomposition Analysis-Natural Orbitals for Chemical Valence (EDA-NOCV) calculations.

Main Results:

• Successful synthesis of a hyper-valent silicon spirocyclic compound containing a silicon-silicon bond.
• NBO analysis provided insights into the electronic structure and bonding characteristics.
• EDA-NOCV calculations confirmed the silicon-silicon bond is characterized by electron sharing.

Conclusions:

• The study presents a new synthetic route to silicon compounds with unusual oxidation states.
• The synthesized spirocyclic silicon compound demonstrates a hyper-valent silicon center and a Si-Si bond.
• The silicon-silicon bond in this novel compound is confirmed to be electron-sharing, contributing to fundamental chemical understanding.