Lithium and Aluminum Anthracenyldiimidosulfinates

Abstract

9,10-Dibromo-anthracene was lithiated once or twice, and the products were reacted with different sulfurdiimides. The reactions yielded [(THF)2Li(NtBu)2SAnBr] (1), [(Et2O)(LiBr)Li(NtBu)2- SAnBr]2 (2), [Me2Al(NtBu)2SAnBr] (3), [{(THF)2Li(NR)2S}2An] (4: R = tBu; 5: R = SiMe3) and [{Me2Al(NSiMe3)2S}2An] (6). All products were fully characterized by X-ray structure analysis, elemental analysis, NMR and mass spectroscopy. From the solution NMR spectra it is evident that the rotation about the S-C bond is hindered even at r. t. leaving all protons of the anthracene framework non-equivalent.