New Radical Cation Salts Based on BDH-TTP Donor: Two Stable Molecular Metals with a Magnetic [ReF6]2− Anion and a Semiconductor with a [ReO4]− Anion

• Published in: Magnetochemistry 2021-04, Vol.7 (4), p.54
• Main Authors: Kushch, Nataliya D., Shilov, Gennady V., Buravov, Lev I., Yagubskii, Eduard B., Zverev, Vladimir N., Canadell, Enric, Yamada, Jun-ichi
• Format: Article
• Language: English
• Subjects: Alcohol; Anions; Cations; conductivity; crystal and band structures; Crystal structure; Diamagnetism; Dimers; electrocrystallization; Electrolytes; Ethanol; Low temperature; Magnetism; metal complex anions; molecular magnets; organic conductors; Population
• ISSN: 2312-7481; 2312-7481
• DOI: 10.3390/magnetochemistry7040054

Three radical cation salts of BDH-TTP with the paramagnetic [ReF6]2− and diamagnetic [ReO4]− anions have been synthesized: κ-(BDH-TTP)4ReF6 (1), κ-(BDH-TTP)4ReF6·4.8H2O (2) and pseudo-κ″-(BDH-TTP)3(ReO4)2 (3). The crystal and band structures, as well as the conducting properties of the salts, have been studied. The structures of the three salts are layered and characterized by alternating κ-(1, 2) and κ″-(3) type organic radical cation layers with inorganic anion sheets. Similar to other κ-salts, the conducting layers in the crystals of 1 and 2 are formed by BDH-TTP dimers. The partial population of positions of Re atoms and disorder in the anionic layers of 1–3 are their distinctive features. Compounds 1 and 2 show the metallic character of conductivity down to low temperatures, while 3 is a semiconductor. The ac susceptibility of crystals 1 was investigated in order to test the possible slow relaxation of magnetization associated with the [ReF6]2− anion.