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• W2140460164 abstract "Electroreduction of 1,3- and 1,4-benzene-bridged bis(diselenadiazolium) salts [1,4-Se][SbF6]2 and [1,4-Se][SbF6]2 in acetonitrile, at a Pt wire and in the presence of iodine affords the 1:1 charge-transfer salts [1,4-Se][I] and [1,3-Se][I]. Crystals of [1,4-Se][I] belong to the monoclinic space group C2/m, with FW = 598.9, a = 10.586(2), b = 16.713(2), c = 3.5006(14) Å, β = 104.26(2)°, V = 600.2(3) Å3, Z = 2. Crystals of [1,3-Se][I] belong to the orthorhombic space group Ima2, with FW = 598.9, a = 28.489(7), b = 3.543(2), c = 12.283(2) Å, V = 1239.8(8) Å3, Z = 4. In the presence of an excess of iodine, electrocrystallization of [1,4-Se]2+ affords the mixed iodide/triiodide salt [1,4-Se][I][I3], space group C2/c, FW = 979.59, a = 12.862(3), b = 15.063(2), c = 9.028(3) Å, β = 100.62(2)°, V = 1719.1(7) Å3, Z = 4. The structures of the two 1:1 compounds consist of perfectly superimposed stacks of molecular units interspersed by columns of disordered iodines. Interstack contacts in both structures are limited, indicative of 1-dimensional electronic structures. Variable-temperature single-crystal conductivity measurements on [1,4-Se][I] reveal weakly metallic behavior at room temperature, with a phase transition to a semiconducting state occurring at about 240 K. Magnetic susceptibility measurements on [1,4-Se][I] are consistent with the conductivity data; the magnetic susceptibility of [1,3-Se][I] behaves similarly. The crystal structures and transport properties are discussed in light of extended Hückel band structure calculations." @default.
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• W2140460164 date "1996-01-01" @default.
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• W2140460164 title "Iodine Charge-Transfer Salts of Benzene-Bridged Bis(1,2,3,5-diselenadiazolyl) Diradicals. Electrocrystallization and Solid-State Characterization of 1,3- and 1,4-[(Se₂N₂C)C₆H₄(CN₂Se₂)][I]" @default.
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• W2140460164 doi "https://doi.org/10.1021/cm950446s" @default.
• W2140460164 hasPublicationYear "1996" @default.
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