scholarly journals The preparation and characterization of radical cation salts derived from perfluorobenzene, perfluorotoluene, and perfluoronaphthalene

1986 ◽  
Vol 108 (16) ◽  
pp. 4937-4943 ◽  
Author(s):  
T. J. Richardson ◽  
F. L. Tanzella ◽  
Neil. Bartlett
Keyword(s):  
Radical Cation ◽  
Radical Cation Salts

scholarly journals Chiral Radical Cation Salts of Me-EDT-TTF and DM-EDT-TTF with Octahedral, Linear and Tetrahedral Monoanions

2021 ◽  
Vol 7 (6) ◽  
pp. 87
Author(s):  
Nabil Mroweh ◽  
Alexandra Bogdan ◽  
Flavia Pop ◽  
Pascale Auban-Senzier ◽  
Nicolas Vanthuyne ◽  
...  
Keyword(s):  
Radical Cation ◽  
Mixed Valence ◽  
Relative Location ◽  
Molecular Conductors ◽  
Resistivity Measurements ◽  
Counter Ions ◽  
Stereogenic Centers ◽  
Radical Cation Salts ◽  
Power Measurements

Methyl-ethylenedithio-tetrathiafulvalene (Me-EDT-TTF (1) and dimethyl-ethylenedithio-tetrathiafulvalene (DM-EDT-TTF (2) are valuable precursors for chiral molecular conductors, which are generally obtained by electrocrystallization in the presence of various counter-ions. The number of the stereogenic centers, their relative location on the molecule, the nature of the counter-ion and the electrocrystallization conditions play a paramount role in the crystal structures and conducting properties of the resulting materials. Here, we report the preparation and detailed structural characterization of the following series of radical cation salts: (i) mixed valence (1)2AsF6 as racemic, and (S) and (R) enantiomers; (ii) [(S)-1]AsF6·C4H8O and [(R)-1]AsF6·C4H8O where a strong dimerization of the donors is observed; (iii) (1)I3 and (2)I3 as racemic and enantiopure forms and (iv) [(meso)-2]PF6 and [(meso)-2]XO4 (X = Cl, Re), based on the new donor (meso)-2. In the latter, the two methyl substituents necessarily adopt axial and equatorial conformations, thus leading to a completely different packing of the donors when compared to the chiral form (S,S)/(R,R) of 2 in its radical cation salts. Single crystal resistivity measurements, complemented by thermoelectric power measurements in the case of (1)2AsF6, suggest quasi-metallic conductivity for the latter in the high temperature regime, with σRT ≈ 1–10 S cm–1, while semiconducting behavior is observed for the (meso)-2 based salts.

The synthesis and characterization of radical cation salts of bis(ethylenedithio)tetraselenafulvalene

1993 ◽  
Vol 56 (1) ◽  
pp. 2090-2095 ◽  
Author(s):  
L.K. Montgomery ◽  
T. Burgin ◽  
J.C. Huffman ◽  
K.D. Carlson ◽  
J.D. Dudek ◽  
...  
Keyword(s):  
Radical Cation ◽  
Synthesis And Characterization ◽  
Radical Cation Salts

scholarly journals 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

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.

ChemInform Abstract: Tetrathiafulvalene-Based Radical Cation Salts with Transition Metal Bis(dicarbollide) Anions

ChemInform ◽  
2016 ◽  
Vol 47 (11) ◽  
pp. no-no
Author(s):  
Vladimir I. Bregadze ◽  
Oleg A. Dyachenko ◽  
Olga N. Kazheva ◽  
Andrey V. Kravchenko ◽  
Igor B. Sivaev ◽  
...  
Keyword(s):  
Transition Metal ◽  
Radical Cation ◽  
Radical Cation Salts

Molecular metals based on radical cation salts of ET and some its analogues with the photochromic nitroprusside anion, [Fe(CN)5NO]2−

1999 ◽  
Vol 102 (1-3) ◽  
pp. 1646-1649 ◽  
Author(s):  
L. Kushch ◽  
L. Buravov ◽  
V. Tkacheva ◽  
E. Yagubskii ◽  
L. Zorina ◽  
...  
Keyword(s):  
Radical Cation ◽  
Radical Cation Salts ◽  
Nitroprusside Anion
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