From Tellurophenes to Siloles. Synthesis, Structures, and Photophysical Properties of 3,4-Unsubstituted 2,5-Diarylsiloles

A series of 3,4-unsubstituted 2,5-diarylsiloles have been prepared from the corresponding tellurophenes via the tellurium−lithium exchange reaction. Their crystal structures, UV−vis absorption spectra, and fluorescence spectra have been determined and compared with those of the 3,4-diphenyl and 3,4-dialkyl analogues.