9,10-DISILYLANTHRACENE - SYNTHESIS, STRUCTURE AND FLUORESCENCE

For the preparation of the title compound, 9,10-dilithiumanthracene is treated with p-anisylchlorosilane to give 9,10-bis(p-anisylsilyl)anth racene (1) with high yields. The protodearylation of 1 with two equiva lents of triflic acid affords ,10-bis(trifluoromethanesulfonatosilyl)a nthracene, which can be converted into 9,10-disilylanthracene (2) usin g LiAlH4. The crystal structures of 1 and 2 have been determined by si ngle-crystal X-ray diffraction. Solutions of 1 and 2 in common organic solvents show a violet fluorescence. The fluorescence spectra are com pared with data on anthracene and 9,10-disubstituted derivatives.