Bis(silanetellurone) with C-H···Te Interaction.

Area of Science:

• Organosilicon Chemistry
• Main Group Chemistry
• Coordination Chemistry

Background:

• N-heterocyclic silylenes are versatile precursors in silicon chemistry.
• Pincer ligands offer unique coordination environments for main group elements.
• Silanechalcogenones are an important class of silicon-chalcogen compounds.

Purpose of the Study:

• To synthesize novel bis(silanechalcogenones) using a SiCSi pincer ligand.
• To characterize the first bis(silanetellurone) derivative.
• To investigate the bonding characteristics and intermolecular interactions in the synthesized compounds.

Main Methods:

• Synthesis of bis(silanechalcogenones) and a bis(cyclosiloxane) derivative.
• Single-crystal X-ray diffraction for structural determination.
• Computational analyses including Natural Bond Orbital (NBO) and Quantum Theory of Atoms in Molecules (QTAIM).
• Spectroscopic characterization (NMR, HRMS).

Main Results:

• Successful synthesis of bis(silanetellurone) (2), bis(silaneselenone) (3), and bis(silanethiones) (4) using ligand 1.
• Identification of weak C-H···Ch interactions in compounds 2-4.
• Synthesis of a novel bis(cyclosiloxane) derivative (5).
• Comprehensive structural and electronic characterization of all synthesized complexes.

Conclusions:

• The SiCSi pincer ligand facilitates the synthesis of diverse silicon-chalcogen compounds.
• The study provides fundamental insights into the bonding and electronic properties of silanechalcogenones.
• This work expands the scope of reactivity for N-heterocyclic silylene-based pincer ligands.