We report the synthesis of three radical-cation salts BEDT-TTF from racemic tris(oxalato)ferrate by electrocrystallization in presence chiral molecules. In enantiopure l-(+)-tartaric acid, we observe spontaneous resolution labile anion to produce salt α-(BEDT-TTF)5[Δ-Fe(C2O4)3].[l-(+)-tartaric acid]2 which contains only Δ enantiomer Fe(C2O4)3. Using (R)-(-)-3-hydroxytetrahydrofuran as an additive gives α-(BEDT-TTF)12[Fe(oxalate)3]2.(H2O)16.ethanol.(R)-(-)-3-hydroxytetrahydrofuran, includes...

This paper reports the first BEDT-TTF radical-cation salts with D 3 symmetry tris-coordinated racemic lanthanide( iii ) anions. It is also crystallographic determination of nine-coordinate tris(chelidonato)terbate and -dysprosate

The quantum spin-liquid state was first theorized by Anderson 50 years ago and the challenge remains to realize a material. A handful of two-dimensional molecular candidates have attracted huge attention over past 30 owing their triangular lattice possessing S = 1/2 spin systems. We present new candidate in 2D Mott insulator κ-(BEDT-TTF)2[BR/S(salicylate)]2. structure has double-width anion layer giving it strong character. spiroborate is chiral salt an inversion twin, having no symmetry...

Normal state conductivity and superconductivity together with bulk magnetic susceptibility magnetization measurements have been measured for two molecular charge-transfer salts: beta' '-(ET)4[(H3O)Ga(C2O4)3]G (ET = bis(ethylenedithio)tetrathiafulvalene, G pyridine compound I nitrobenzene II). With the exception of included guest molecules (G) crystal structures are almost identical. Both show minima in their electrical transport at 130 K 160 II, but lower temperatures behaviors differ...

Metallic charge-transfer salts of BEDT-TTF containing both racemic (R/S)- and chiral (S)-sec-phenethyl alcohol as guest molecules have been crystallised their structures physical properties are compared.

Thermochromic nitroxide: A nitroxide radical (AZADO) exhibits thermochromism with a structural change from dimer at low temperature (4 °C) to paired monomers large antiferromagnetic interaction high (35 °C). An hysteresis loop is observed in the magnetic data of this compound, revealing it exhibit first-order phase transition room-temperature bistability.

A sequence of oxidation reactions alkenamides with hypervalent iodine is described. Oxidation ortho-alkenylbenzamide substrates selectively gave isochroman-1-imine products. The products underwent further in the presence a Pd salt catalyst leading to regioselective C–H acetoxylation at 8-position. series oxidations was applied crucial steps asymmetric synthesis 4-hydroxymellein derivatives.

Temperature dependence of heat capacities organic superconductors, $\ensuremath{\kappa}\ensuremath{-}{(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F})}_{2}{\mathrm{Cu}[\mathrm{N}(\mathrm{CN})}_{2}]X (X=\mathrm{Br}$ and Cl), was measured by chopped-light ac calorimetry between 10 300 K. A small anomaly clearly detected at the superconducting transition in Br salt. For Cl salt, a slight observed 45 K where spin-density wave-like previously suggested to...

The synthesis, electrochemical properties, and molecular structure of a new pi-electron donor, 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene (BDA-TTP), is described. In contrast to the hitherto-known tetrachalcogenafulvalene pi-donors providing organic superconductors, this donor contains only bis-fused 1,3-dithiole-2-ylidene unit as system, yet produces series ambient-pressure superconductors beta-(BDA-TTP)2X [X = SbF6 (magnetic T(c) 6.9 K, resistive 7.5 K), AsF6 5.9 5.8 PF6...

λ-(BETS)2GaBrxCl4-x [BETS = bis(ethylenedithio)tetraselenafulvalene; 0 ≤ x 2] is a molecular superconductor with strongly correlated conduction electrons. The electrical transport properties of are drastically changed by varying the bromine content or applying pressure. At ambient pressure, superconducting transition could be observed for < 0.75. pressure and dependencies Tc were examined. M−H curve (M magnetization; H magnetic field) at 2 K indicated almost perfect Meissner state phase...

Two polymorphs of a chiral conductor formulated (BEDT-TTF)3NaCr(C2O4)3·CH3NO2 have been crystallised from solution containing the racemic anion tris(oxalato)chromate(III). In presence (R)-(−)-carvone electrocrystallisation Na3Cr(C2O4)3 with BEDT-TTF and nitromethane yields two products: hexagons crystallising in space group P212121 (I) needles P21 (II). Single crystal electrical transport measurements show semiconducting behavior for both salts.

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSuperconductor-to-Insulator Transition in an Organic Metal Incorporating Magnetic Anions: λ-(BETS)2(FexGa1-x)Cl4 [BETS = bis(ethylenedithio)tetraselenafulvalene; x ≈ 0.55 and 0.43]Hayao Kobayashi, Akane Sato, Emiko Arai, Hiroki Akutsu, Akiko Patrick CassouxView Author Information Institute for Molecular Science Okazaki, Aichi 444, Japan Department of Chemistry, Faculty The University Tokyo Hongo, Bunkyo-ku, 113, Equipe Précurseurs...

The physical properties of a series organic superconductors with fourfold quasistacking structures, $\ensuremath{\lambda}\ensuremath{-}{\mathrm{BETS}}_{2}\mathrm{Ga}{X}_{z}{Y}_{4\ensuremath{-}z}$ [BETS=bis(ethylenedithiotetraselenafulvalene; $X,Y=\mathrm{F},$ Cl, Br; $0<z<2)]$ are changed continuously by tuning the value $z.$ compound $\ensuremath{\lambda}\ensuremath{-}{\mathrm{BETS}}_{2}{\mathrm{GaBr}}_{z}{\mathrm{Cl}}_{4\ensuremath{-}z},$ has superconducting ground state for $0<z<{z}_{c}$...

We report magnetotransport measurements on the quasi-two-dimensional charge-transfer salts ${\ensuremath{\beta}}^{\ensuremath{''}}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{4}[({\mathrm{H}}_{3}\mathrm{O})M{({\mathrm{C}}_{2}{\mathrm{O}}_{4})}_{3}]Y$, with $Y={\mathrm{C}}_{6}{\mathrm{H}}_{5}{\mathrm{NO}}_{2}$ and ${\mathrm{C}}_{6}{\mathrm{H}}_{5}\mathrm{CN}$ using magnetic fields of up to 45 T temperatures down 0.5 K. A surprisingly robust superconducting state an...

Any old ion? Two bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) radical salts with ion channels of stacked [18]crown-6 and Cat/H2O molecules (Cat=H3O+ or NH4+) are described. The structures contain alternating BEDT-TTF layers, [(Cat)M(C2O4)3]2− (M=Ga, Cr) the (see picture). metallic electrical conductors, they show high protonic conductivity.

The electric and magnetic properties of a series highly correlated two-dimensional organic \ensuremath{\pi} conductors incorporating ions (${\mathrm{Fe}}^{3+}$ with $S=\frac{5}{2}$), $\ensuremath{\lambda}\ensuremath{-}{\mathrm{BETS}}_{2}{\mathrm{FeBr}}_{x}{\mathrm{Cl}}_{4\ensuremath{-}x}$ [$\mathrm{B}\mathrm{E}\mathrm{T}\mathrm{S}=\mathrm{b}\mathrm{i}\mathrm{s}(\mathrm{ethylenedithio})\mathrm{tetraselenafulvalene},$ $x=0--0.8$] were examined by controlling the Br content (x). A broad...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHighly Correlated Organic Conductor with Magnetic Anions Exhibiting a π−d Coupled Metal−Insulator Transition, λ-(BETS)2FeBrxCl4-x (BETS = Bis(ethylenedithio)tetraselenafulvalene)Hiroki Akutsu, Emiko Arai, Hayao Kobayashi, Hisashi Tanaka, Akiko and Patrick CassouxView Author Information Institute for Molecular Science, Okazaki 444, Japan Department of Chemistry, School Science The University Tokyo Hongo, Bunkyo-ku, 113, Laboratoire de Chimie...

We report high-field magnetotransport measurements on ${\ensuremath{\beta}}^{\ensuremath{''}}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{4}[({\mathrm{H}}_{3}\mathrm{O})M({\mathrm{C}}_{2}{\mathrm{O}}_{4}{)}_{3}]Y,$ where $M=\mathrm{Ga},$ Cr, and Fe $Y={\mathrm{C}}_{5}{\mathrm{H}}_{5}\mathrm{N}.$ observe similar Shubnikov--de Haas oscillations in all compounds, attributable to four quasi-two-dimensional Fermi-surface pockets, the largest of which corresponds a cross-sectional...

Three conducting BEDT-TTF charge-transfer salts with tris(oxalato)metallate anions have unit cells containing both[small alpha] and [small beta][double prime] donor packing motifs.

The first chiral BEDT-TTF-tris(oxalato)metallate(III) salt has been crystallised from a solution containing the racemic anion in solvent (R)-(−)-carvone.

Crystallisation from chiral electrolyte (<italic>R</italic>)-(−)-carvone has produced three new semiconducting salts of BEDT-TTF racemic anion tris(oxalato)chromate(<bold>III</bold>).

Abstract Radical‐cation salts of BEDT‐TTF with chiral anions provide the opportunity to combine chirality conductivity in same molecular material. We report here two salts, (BEDT‐TTF) 3 NaAl(C 2 O 4 ) · nitromethane and (NH 0.83 Cr 1.17 (C nitromethane. The former crystallises space group P 1 latter . use alone as electrolyte for electrocrystallisation produces no crystals, but addition ( R )‐(–)‐carvone yields crystals these new radical‐cation through induction from racemic...

Low-temperature heat capacity of the organic superconductor λ-(BETS)2GaCl4 in a temperature range between 0.6 and 10 K was measured for single crystal sample by relaxation calorimetry technique. The contribution electronic superconducting state shows T2 dependence at lower that indicates existence quasi-particle excitations from line-nodal gap structure d-wave pairing. recovery coefficient, γ magnetic field H1/2 is consistent with picture superconductor. In spite different packing typical...

Resistance and magnetic torque measurements are reported in a layered organic superconductor, $\ensuremath{\beta}''\ensuremath{-}{(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF})}_{4}[({\mathrm{H}}_{3}\mathrm{O})\mathrm{Ga}{({\mathrm{C}}_{2}{\mathrm{O}}_{4})}_{3}]{\mathrm{C}}_{6}{\mathrm{H}}_{5}{\mathrm{NO}}_{2}$ with ${T}_{c}=4.8$ K, where BEDT-TTF stands for bis(ethylenedithio)tetrathiafulvalene. Because of the large anion between conducting layers, superconductivity this salt is highly...