A chiral molecular conductor: synthesis, structure, and physical properties of [ET]3[Sb2(L-tart)2].CH3CN (ET = bis(ethylendithio)tetrathiafulvalene; L-tart = (2R,3R)-(+)-tartrate).
The salt [ET](3)[Sb(2)(L-tart)(2)].CH(3)CN (1) has been obtained by electrocrystallization of the organic donor bis(ethylendithio)tetrathiafulvalene (ET or BEDT-TTF) in the presence of the chiral anionic complex [Sb(2)(L-tart)(2)](2-) (L-tart = (2R,3R)-(+)-tartrate). This salt crystallizes in the chiral space group P2(1)2(1)2(1) (a = 11.145(2) angstroms, b = 12.848(2) angstroms, c = 40.159(14) angstroms, V = 5750.4(14) angstroms(3), Z = 4) and is formed by alternating layers of the anions and of the organic radicals in a noncentrosymmetric alpha-type packing. This compound shows a room temperature electrical conductivity of approximately 1 S.cm(-1) and semiconducting behavior with an activation energy of approximately 85 meV. Analysis of the magnetic susceptibility and band structure, however, suggests that this compound should be a narrow band gap semiconductor.
Coronado
Eugenio
E
Instituto de Ciencia Molecular, Universidad de Valencia, C/ Doctor Moliner 50, 46100 Burjassot, Spain. eugenio.coronado@uv.es
Galán-Mascarós
José R
JR
Gómez-García
Carlos J
CJ
Murcia-Martínez
Ana
A
Canadell
Enric
E
D000965:Antimony / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D013644:Tartrates / Q000138:chemical synthesis / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics
C495372:(ET)3(Sb2(L-tart)2)CH3CN; D009942:Organometallic Compounds; D013644:Tartrates; D000965:Antimony