Synthesis and characterization of a 2, 5-Bis(trimethylsilyl)-substituted Bis(1, 1′-silolide) dianion

GRAPHICAL ABSTRACT

ABSTRACT

A novel silyl-substituted bis(1, 1′-silolide) dianion has been isolated and characterized by single-crystal X-ray analysis for the first time. The ¹H, ²⁹Si, and ¹³C NMR spectra show significant delocalization of the negative charges to the silole ring. X-ray crystallography revealed equalized C−C distances and DFT calculation also indicates for significant aromaticity. Reaction with trimethylchlorosilane gave the expected bis(1, 2, 5-tris(trimethylsilyl)-3, 4-diphenyl-silacyclopentadienyl).

KEYWORDS:

• Aromaticity
• bis(silole)
• dianion
• silyl effect

Acknowledgment

This work was supported by the National Natural Science Foundation of China.

Additional information

Funding

Natural Science Foundation of China [21575115,21327005,21565022].