MeSi(CH₂ SnRO)₃ (R=Ph, Me₃ SiCH₂ ): Building Blocks for Triangular-Shaped Diorganotin Oxide Macrocycles

Area of Science:

• Organometallic Chemistry
• Materials Science
• Supramolecular Chemistry

Background:

• Organotin compounds are versatile in synthesis and have diverse applications.
• The construction of large, well-defined molecular architectures remains a significant challenge in chemistry.

Purpose of the Study:

• To synthesize novel silicon-bridged tris(tetraorganotin) compounds and their halogenated derivatives.
• To investigate the formation and structural characterization of high-nuclearity molecular diorganotin oxides.

Main Methods:

• Synthesis of novel organotin precursors.
• Reactions with di-t-butyltin oxide and sodium hydroxide to form macrocyclic structures.
• Characterization using elemental analysis, ESI-MS, NMR (including 1H DOSY), IR spectroscopy, and single-crystal X-ray diffraction.

Main Results:

• Successful synthesis of silicon-bridged tris(tetraorganotin) compounds and halogenated derivatives.
• Formation of unprecedented 18-nuclear and 30-nuclear molecular diorganotin oxides (compounds 7 and 8).
• Elucidation of belt-like, ladder-type macrocyclic structures for compounds 7 and 8 via X-ray diffraction.

Conclusions:

• The study reports the synthesis of novel organotin compounds and the creation of the largest molecular diorganotin oxides to date.
• The belt-like macrocyclic structures represent a significant advancement in supramolecular assembly of organotin compounds.
• The characterized compounds offer new possibilities for exploring the chemistry and applications of large organometallic architectures.