A new series of radical-cation salts based on asymmetrical ethylenedithiodimethyl-tetrathiafulvalene (EDTDM-TTF). Properties and crystal structure of (EDTDM-TTF)2PF6

Peter Day’s research group reported the first molecular superconductor containing paramagnetic metal ions in 1995, β″-(BEDT-TTF)4(H3O)Fe(C2O4)3·C6H5CN. Subsequent research has produced a multitude of BEDT-TTF-tris(oxalato)metallate salts with a variety of structures and properties, including 32 superconductors to date. We present here the synthesis, crystal structure, and conducting properties of the newest additions to the Day series including the first superconductor incorporating the diamagnetic tris(oxalato)aluminate anion, β″-(BEDT-TTF)4(H3O)Al(C2O4)3·C6H5Br, which has a superconducting Tc of ~2.5 K. β″-(BEDT-TTF)4(H3O)Co(C2O4)3·C6H5Br represents the first example of a β″ phase for the tris(oxalato)cobaltate anion, but this salt does not show superconductivity.

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New Electroconducting Radical Cation Salts Based on BEDT-TTF with 8,8’-Dibromo Cobalt Bis(Dicarbollide) Anion

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.54.331 ◽

2008 ◽

Vol 54 ◽

pp. 331-336 ◽

Cited By ~ 4

Author(s):

Olga Kazheva ◽

Grigorii Alexandrov ◽

Andrey Kravchenko ◽

Vladimir Starodub ◽

Irina Lobanova ◽

...

Keyword(s):

Crystal Structure ◽

Electrical Conductivity ◽

Crystal Structures ◽

Radical Cation ◽

Molecular Conductors ◽

Electrical Conductivities ◽

Radical Cation Salts

New molecular conductors on the base of 8,8’-dibromo cobalt bis(dicarbollide) anion, (BEDT-TTF)2[8,8’-Br2-3,3’-Co(1,2-C2B9H10)2] (1), and (BEDT-TTF)[8,8’-Br2-3,3’-Co(1,2-C2B9H10)2] (2) were synthesized and their crystal structures and electrical conductivities were determined. Both radical cation salts prepared were found to be semiconductors. The introduction of two bromine atoms in the cobalt bis(dicarbollide) anion produces a strong effect on crystal structure and electrical conductivity of the prepared materials.

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Peculiarities of the synthesis, structure and properties of ET radical cation salts prepared in the presence of the rare-earth metal complex anions

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:2004114124 ◽

2004 ◽

Vol 114 ◽

pp. 527-528 ◽

Cited By ~ 3

Author(s):

N. D. Kushch ◽

A. V. Kazakova ◽

L. I. Buravov ◽

A. N. Chekhlov ◽

E. B. Yagubskii

Keyword(s):

Rare Earth ◽

Metal Complex ◽

Radical Cation ◽

Rare Earth Metal ◽

Earth Metal ◽

Structure And Properties ◽

Rare Earth Metal Complex ◽

Radical Cation Salts ◽

Complex Anions ◽

The Rare Earth

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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

Magnetochemistry ◽

10.3390/magnetochemistry7040054 ◽

2021 ◽

Vol 7 (4) ◽

pp. 54

Author(s):

Nataliya D. Kushch ◽

Gennady V. Shilov ◽

Lev I. Buravov ◽

Eduard B. Yagubskii ◽

Vladimir N. Zverev ◽

...

Keyword(s):

Radical Cation ◽

Low Temperatures ◽

Ac Susceptibility ◽

Slow Relaxation ◽

Organic Radical ◽

Inorganic Anion ◽

Distinctive Features ◽

Metallic Character ◽

Radical Cation Salts ◽

Partial Population

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.

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