关键词: 晶体结构, 电导, 磁性, 乙二硫撑四硫代富瓦烯

Abstract: A new charge transfer complex of bis(ethylenedithio)tetrathiafulvalene, (BEDT TTF)₄·H₂O·Fe(C₂O₃)₃·C₆H₅NO₂, were prepared, and its crystal structure and physical properties were determined. The crystal structure of the complex has been refined in the C2/c space group, the unit cell parameters: a=1.031(8) nm, b=2.014(8) nm, c=3.534(4) nm, β=9.221(9)°, Z=4, R=0.065. Successive layers of BEDT-TTF and layers of and approximately hexoganal geometry containing alternating H₂O and Fe(C₂O₄)₃^3- were formed, with C₆H₅NO₂ lying within the hexagonal cavities. The BEDT TTFadopts the β packing, the charge of BEDT TTFestimated from the C＝C and C—S bond lengths is +3/4 . The complex is a semiconductor with σ_r.t.=10 S·cm^-1 . The ESRspectra of the complex shows only one signal with the line width Δ H=3.81×10^-4 T, which indicates that there may be some interaction between the conduction electrons and the 3d⁵ electrons of Fe³⁺ .

Key words: Crystal structure, Electrical conductivity, Magnetic property, BEDT-TTF