Structures and electrical properties of a new molecular conductor (BSM‐TTP)<sub>4</sub>(PF<sub>6</sub>)<sub>3</sub>(C<sub>6</sub>H<sub>5</sub>Cl)<sub>2</sub>

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<jats:title>Abstract</jats:title><jats:p>The title salt, where BSM‐TTP is 2‐[4,5‐bis(methylseleno)‐1,3‐dithiol‐2‐ylidene]‐5‐(1,3‐dithiol‐2‐ylidene)‐1,3,4,6‐tetrathiapentalene, was prepared. The X‐ray structure analysis reveals that the donors form teramerized columns, each of which is connected through an edge‐to‐edge chalcogen interaction. A tight‐binding band calculation suggests that this salt is a semi‐metal with small Fermi surfaces. Indeed, this salt exhibited high conductivity of σ<jats:sub>rt</jats:sub> = 25 S cm<jats:sup>‐1</jats:sup> at room temperature, and showed metallic conducting behaviour down to <jats:italic>T</jats:italic><jats:sub>MI</jats:sub> = 170 K. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</jats:p>

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