1. Thienothiophenes. Part 2.1 Synthesis, metallation and bromine→lithium exchange reactions of thieno[3,2-b]thiophene and its polybromo derivatives Lance S. Fuller,Brian Iddon,Kevin A. Smith J. Chem. Soc. Perkin Trans. 1 1997 3465
2. Linearly condensed polythiophenes: characteristic molecular aggregation of thieno[2″,3″:4′,5′]thieno[2′,3′-d]thieno[3,2-b]thiophene crystals revealed by ultraviolet photoelectron spectroscopy Naoki Sato,Yasuhiro Mazaki,Keiji Kobayashi,Tsunetoshi Kobayashi J. Chem. Soc. Perkin Trans. 2 1992 765
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