scholarly journals New crystal packing arrangements in radical cation salts of BEDT-TTF with [Cr(NCS)6]3− and [Cr(NCS)5(NH3)]2−

Polyhedron ◽  
2015 ◽  
Vol 102 ◽  
pp. 75-81 ◽  
Author(s):  
Andrew C. Brooks ◽  
Lee Martin ◽  
Peter Day ◽  
William Clegg ◽  
Ross W. Harrington ◽  
...  
Keyword(s):  
Radical Cation ◽  
Crystal Packing ◽  
Radical Cation Salts

scholarly journals Chiral Conducting Me-EDT-TTF and Et-EDT-TTF-Based Radical Cation Salts with the Perchlorate Anion

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1069
Author(s):  
Nabil Mroweh ◽  
Pascale Auban-Senzier ◽  
Nicolas Vanthuyne ◽  
Elsa B. Lopes ◽  
Manuel Almeida ◽  
...  
Keyword(s):  
Radical Cation ◽  
Structural Changes ◽  
Crystal Packing ◽  
Tight Binding ◽  
Molecular Conductors ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Crystalline Materials ◽  
Metallic Conductivity ◽  
Radical Cation Salts

Introduction of chirality in the field of molecular conductors has received increasing interest in recent years in the frame of modulation of the crystal packing, and hence conducting properties, with the number of stereogenic centers and absolute configuration, e.g., racemic or enantiopure forms. Here, we describe the preparation by electrocrystallization of chiral radical cation salts, based on the donors methyl-ethylenedithio-tetrathiafulvalene (Me-EDT-TTF) 1 and ethyl-ethylenedithio-tetrathiafulvalene (Et-EDT-TTF) 2 containing one stereogenic center, with the perchlorate anion. Donor 1 provided the series of crystalline materials [(rac)-1]ClO4, [(S)-1]2ClO4 and [(R)-1]2ClO4, while for donor 2 only the 1:1 salts [(rac)-2]ClO4 and [(R)-2]ClO4 could be prepared as suitable single crystals for X-ray analysis. The enantiopure salts of 1 show β-type packing and metallic conductivity in the high temperature regime, with room temperature conductivity values of 5–10 S cm−1, whereas compound [(rac)-2]ClO4 is a very poor semiconductor. Tight-binding extended Hückel band structure calculations support the metallic conductivity of the enantiopure salts of 1 and suggest that small structural changes, possibly induced by thermal contraction or pressure, could lead to a pseudo-elliptic closed Fermi surface, typical for a 2D metal.

scholarly journals Contrasting crystal packing arrangements in triiodide salts of radical cations of chiral bis(pyrrolo[3,4-d])tetrathiafulvalenes

CrystEngComm ◽  
2015 ◽  
Vol 17 (38) ◽  
pp. 7354-7362 ◽  
Author(s):  
Lee Martin ◽  
Songjie Yang ◽  
Andrew C. Brooks ◽  
Peter N. Horton ◽  
Louise Male ◽  
...  
Keyword(s):  
Radical Cation ◽  
Crystal Packing ◽  
Radical Cations ◽  
Radical Cation Salts

Triiodides are arranged in head to tail pairs, infinite lines or a castellated arrangement in the radical cation salts of chiral bis(N(1-arylethyl))pyrrolo-tetrathiafulvalene 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
Sign in / Sign up

Export Citation Format

Share Document