In continuation of a 1987 review in this journal this review describes additional syntheses of 1,3- and 1,2-tetrachalcogenafulvalenes, the chemical transformation of substituents, and the synthesis of polymers with 1,3-tetrathiafulvalene units in the backbone and in the side chain. For some chargetransfer complexes with tetrachalcogenafulvalenes as donor superconducting properties are reported. Selected properties (melting points, UV/VIS absorption data, and oxidation potentials) of 1,2- and 1,3-tetrachalcogenafulvalenes, prepared after publication of our 1987 review, are summarized in appropriate tables.
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Schukat et al. (1993) studied this question.
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