title: One-dimensional CuBr4(2-) ion array and CuBr3- ion chain included in the pi conducting framework composed of bis(methylthio)tetrathiafulvalenothioquinone-1,3-dithiocarbonatodithiolemethide molecules.
abstract: The reaction of a new donor molecule having a planar but largely bent skeleton, bis(methylthio)tetrathiafulvalenothioquinone-1,3-dithiocarbonatodithiolemethide (1), with CuBr(2) in CH(3)CN/CS(2) afforded a black-colored crystal with a formula of 1(4).CuBr(4).2CuBr(3). In the crystal 1 molecules are one-dimensionally stacked to form half-cut pipelike columns, which are arranged to construct two different shapes of channels included by a one-dimensional array of CuBr(4)(2)(-) ions and a bibromide-bridged linear chain of CuBr(3)(-) ions with a square-pyramidal geometry at the Cu atom, [CuBr(3)(-)](n)(), respectively. The room-temperature electrical conductivity on the single crystal of 1(4).CuBr(4).2CuBr(3) was 2.0 x 10(-)(2) S cm(-)(1), and the temperature dependence of electrical conductivity was semiconducting with a large activation energy of 160 meV. The interactions between the neighboring Cu(II) d spins in the one-dimensional S = 1/2 spin systems due to CuBr(4)(2)(-) ions and CuBr(3)(-) ions in [CuBr(3)(-)](n)() were both antiferromagnetic, and the magnitudes were moderate (Weiss temperature, THETAV; = -18 K) in the former spin system and fairly large (coupling constant, J/k(B) = -120 K) in the latter spin system, which was in marked contrast to a moderate and ferromagnetic [CuBr(3)(-)](n)() chain in the cyclohexylammonium salt already known.
authors.affiliation: Research Institute for Advanced Science and Technology, Osaka Prefecture University, Osaka 599-8570, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Yohsuke
authors.initials: Y
authors.lastname: Kamada
authors.forename: Toyonari
authors.initials: T
authors.lastname: Sugimoto
authors.forename: Toshiji
authors.initials: T
authors.lastname: Tada
authors.forename: Satoru
authors.initials: S
authors.lastname: Noguchi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nakazumi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kawakami
authors.forename: Kizashi
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Motoo
authors.initials: M
authors.lastname: Shiro