π-Electron systems containing Si=Si double bonds.

Area of Science:

• Organosilicon Chemistry
• Materials Science
• Synthetic Chemistry

Background:

• Sterically demanding substituents are crucial for stabilizing reactive low-coordinate compounds.
• The kinetic protection of silicon-silicon double bonds (disilenes) was pioneered by West et al. in 1981 using bulky mesityl groups.
• Exploration of disilene π-electron systems remained limited until the development of oligo(p-phenylenedisilenylene)s (Si-OPVs) around 2007.

Purpose of the Study:

• To review recent advancements in the chemistry of π-electron systems featuring silicon-silicon double bonds.
• To highlight the synthesis, characterization, and potential applications of these disilene compounds.
• To focus on donor-free π-conjugated disilenes developed primarily in the last decade.

Main Methods:

• Literature review of studies published in the last decade.
• Focus on synthetic strategies for creating sterically hindered disilenes.
• Characterization techniques for unsaturated silicon compounds.

Main Results:

• Successful isolation and characterization of various sterically protected disilenes.
• Development of novel synthetic routes to access these compounds.
• Exploration of the unique electronic properties arising from Si=Si π-bonds.

Conclusions:

• Steric protection is key to accessing and studying disilene chemistry.
• Recent research has significantly expanded the scope and understanding of π-conjugated disilenes.
• These compounds hold potential for future materials science applications.