2. New precursors for preparing organic conducting materials: synthesis of (R)-hydroxymethylbis(ethylenedithio)tetrathiafulvalene, and the ring expansion of a cyclic sulfate ester Fabien Leurquin,Turan Ozturk,Melanie Pilkington,John D. Wallis J. Chem. Soc. Perkin Trans. 1 1997 3173