Spiro-type heterasumanenes composed of two triphenylenodithiophene units and group 14 bridging atoms were synthesized by stepwise lithiations of hexaalkoxytriphenylene derivatives and treatment with heteroatom reagents.

Deep purplish red semicrystaline precipitates were obtained by the treatment of Cu2O with HF. After calcination at 100 °C or higher temperature, this compound was successfully used as a highly effective halogen-exchange fluorination reagent for primary alkyl halides in the presence of pyridine derivatives. AgF and a mixture of CuF2 with copper powder also exhibited high activity in the reaction.

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