metal-organic compounds
Bis(ethylenedithio)tetrathiafulvalenium–tetrachloridocobaltate(II) (3/2)
aSchool of Chemistry and Chemical Engineering, TaiShan Medical University, Tai'an 271016, People's Republic of China
*Correspondence e-mail: binboll@126.com
The structure of the electrochemically crystallized title compound, (C10H8S8)3[CoCl4]2, consists of two types of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) stacks separated by sheets of tetrahedral [CoCl4]2− anions. One of the BEDT-TTF molecules is generated by inversion. There are short S⋯S contacts between the stacks in the a direction and short C—H⋯Cl contacts between the radical cations and the anions.
Related literature
For related literature, see: Mori (1998, 1999); Mori et al. (1999, 2002); Shibaeva & Yagubskii (2004); Varma et al. (1987); Williams et al. (1984).
Experimental
Crystal data
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Refinement
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Data collection: XSCANS (Bruker, 1996); cell XSCANS; data reduction: XSCANS; program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536808033692/hb2784sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808033692/hb2784Isup2.hkl
BEDT-TTF was synthesized following the method of Varma et al. (1987) and recrystallized from CHCl3. K2CoCl4.6H2O was synthesized by metathesis of CoCl2.6H2O and KCl in a molar ratio of 1:2 in water and recrystallized before use. All solvent were distilled before use.
Electrochemical crystal growth was carried out in conventional H-shaped cells with Pt electrodes in a constant temperature of 295 (2) K at a current of 0.2 µA. Each cell contained 7 mg of BEDT-TTF and 99.3 mg of K2CoCl4.6H2O together with 40 mg of 18-crown-6 in 35 mL of TCE(1,1,2-trichloroethane) under an inert atmosphere (N2). Black needles of (I) were obtained after three months.
The electrocrystallization process is a 'self-assembly' process which is difficult to control. The tendency to grow as bundles of fine needles has hampered our efforts to get a better crystal. The low quality of the crystal was the reason for low bond precision, but the obtained structure information of the title compound is meaningful.
The H atoms were geometrically placed (C—H = 0.97Å) and refined as riding with Uiso(H)= 1.2 Ueq(C).
Data collection: XSCANS (Bruker, 1996); cell
XSCANS (Bruker, 1996); data reduction: XSCANS (Bruker, 1996); program(s) used to solve structure: SIR (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).(C10H8S8)3[CoCl4]2 | Z = 1 |
Mr = 1555.39 | F(000) = 778 |
Triclinic, P1 | Dx = 1.969 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 6.7904 (19) Å | Cell parameters from 31 reflections |
b = 9.6402 (18) Å | θ = 5.0–12.4° |
c = 20.499 (4) Å | µ = 2.03 mm−1 |
α = 86.280 (14)° | T = 293 K |
β = 89.967 (19)° | Prism, black |
γ = 78.456 (19)° | 0.22 × 0.18 × 0.10 mm |
V = 1311.9 (5) Å3 |
Bruker P4 diffractometer | 1927 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.094 |
Graphite monochromator | θmax = 26.0°, θmin = 2.0° |
/w scans | h = −8→1 |
Absorption correction: ψ scan (XSCANS; Bruker, 1996) | k = −11→11 |
Tmin = 0.652, Tmax = 0.816 | l = −25→25 |
6527 measured reflections | 97 standard reflections every 3 reflections |
5159 independent reflections | intensity decay: 1% |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.100 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.281 | H-atom parameters constrained |
S = 0.92 | w = 1/[σ2(Fo2) + (0.1192P)2] where P = (Fo2 + 2Fc2)/3 |
5159 reflections | (Δ/σ)max < 0.001 |
289 parameters | Δρmax = 0.91 e Å−3 |
8 restraints | Δρmin = −1.06 e Å−3 |
(C10H8S8)3[CoCl4]2 | γ = 78.456 (19)° |
Mr = 1555.39 | V = 1311.9 (5) Å3 |
Triclinic, P1 | Z = 1 |
a = 6.7904 (19) Å | Mo Kα radiation |
b = 9.6402 (18) Å | µ = 2.03 mm−1 |
c = 20.499 (4) Å | T = 293 K |
α = 86.280 (14)° | 0.22 × 0.18 × 0.10 mm |
β = 89.967 (19)° |
Bruker P4 diffractometer | 1927 reflections with I > 2σ(I) |
Absorption correction: ψ scan (XSCANS; Bruker, 1996) | Rint = 0.094 |
Tmin = 0.652, Tmax = 0.816 | 97 standard reflections every 3 reflections |
6527 measured reflections | intensity decay: 1% |
5159 independent reflections |
R[F2 > 2σ(F2)] = 0.100 | 8 restraints |
wR(F2) = 0.281 | H-atom parameters constrained |
S = 0.92 | Δρmax = 0.91 e Å−3 |
5159 reflections | Δρmin = −1.06 e Å−3 |
289 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
C11 | 0.271 (3) | 0.0230 (19) | 0.6376 (9) | 0.068 (6) | |
H11A | 0.2624 | 0.0986 | 0.6671 | 0.081* | |
H11B | 0.1845 | −0.0397 | 0.6542 | 0.081* | |
C12 | 0.487 (2) | −0.0600 (19) | 0.6370 (11) | 0.085 (7) | |
H12A | 0.4917 | −0.1379 | 0.6090 | 0.102* | |
H12B | 0.5226 | −0.1013 | 0.6809 | 0.102* | |
C1 | 0.557 (2) | 0.4107 (18) | 1.1811 (8) | 0.051 (5) | |
H1A | 0.6758 | 0.3413 | 1.1952 | 0.061* | |
H1B | 0.5116 | 0.4665 | 1.2180 | 0.061* | |
C2 | 0.397 (2) | 0.3341 (16) | 1.1632 (8) | 0.041 (4) | |
H2A | 0.3816 | 0.2680 | 1.1997 | 0.049* | |
H2B | 0.4443 | 0.2784 | 1.1265 | 0.049* | |
C3 | 0.397 (2) | 0.5999 (16) | 1.0767 (7) | 0.035 (4) | |
C4 | 0.218 (2) | 0.5659 (13) | 1.0853 (7) | 0.029 (3) | |
C5 | 0.161 (2) | 0.7692 (15) | 0.9978 (7) | 0.035 (4) | |
C6 | 0.076 (2) | 0.8723 (13) | 0.9480 (7) | 0.023 (3) | |
C7 | 0.023 (2) | 1.0697 (16) | 0.8548 (7) | 0.035 (4) | |
C8 | −0.155 (2) | 1.0292 (14) | 0.8635 (7) | 0.034 (4) | |
C9 | −0.106 (3) | 1.2069 (19) | 0.7415 (9) | 0.061 (6) | |
H9A | −0.0977 | 1.2849 | 0.7099 | 0.073* | |
H9B | −0.0827 | 1.1209 | 0.7181 | 0.073* | |
C10 | −0.304 (3) | 1.228 (2) | 0.7659 (9) | 0.069 (6) | |
H10A | −0.3953 | 1.2454 | 0.7286 | 0.082* | |
H10B | −0.3260 | 1.3151 | 0.7888 | 0.082* | |
C13 | 0.350 (2) | 0.2161 (15) | 0.5480 (7) | 0.035 (4) | |
C14 | 0.542 (2) | 0.1863 (16) | 0.5711 (8) | 0.040 (4) | |
C15 | 0.485 (3) | 0.4319 (15) | 0.5147 (9) | 0.045 (4) | |
Cl1 | 0.0026 (7) | 0.7913 (4) | 0.7470 (2) | 0.0460 (11) | |
Cl2 | −0.2946 (7) | 0.5703 (5) | 0.6666 (2) | 0.0563 (13) | |
Cl3 | 0.0831 (8) | 0.7338 (5) | 0.5751 (2) | 0.0546 (13) | |
Cl4 | 0.2378 (7) | 0.4170 (4) | 0.6910 (2) | 0.0529 (12) | |
Co01 | 0.0140 (4) | 0.6252 (2) | 0.67099 (11) | 0.0402 (6) | |
S1 | 0.6258 (6) | 0.5265 (5) | 1.1162 (2) | 0.0508 (13) | |
S2 | 0.1496 (6) | 0.4391 (4) | 1.1417 (2) | 0.0426 (11) | |
S3 | 0.4092 (6) | 0.7397 (4) | 1.0199 (2) | 0.0373 (10) | |
S4 | 0.0217 (6) | 0.6592 (4) | 1.0356 (2) | 0.0351 (10) | |
S5 | 0.2191 (6) | 0.9787 (4) | 0.9081 (2) | 0.0371 (10) | |
S6 | −0.1704 (6) | 0.9004 (4) | 0.9241 (2) | 0.0370 (10) | |
S7 | 0.0938 (6) | 1.1928 (4) | 0.7998 (2) | 0.0388 (11) | |
S8 | −0.3763 (6) | 1.0934 (5) | 0.8193 (2) | 0.0439 (11) | |
S9 | 0.1832 (8) | 0.0971 (5) | 0.5591 (2) | 0.0572 (14) | |
S10 | 0.6771 (8) | 0.0341 (5) | 0.6107 (3) | 0.0673 (16) | |
S11 | 0.2669 (7) | 0.3772 (5) | 0.5071 (2) | 0.0536 (13) | |
S12 | 0.6655 (6) | 0.3251 (4) | 0.5600 (2) | 0.0450 (12) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C11 | 0.089 (17) | 0.062 (13) | 0.058 (13) | −0.042 (13) | 0.003 (12) | 0.028 (10) |
C12 | 0.104 (18) | 0.063 (13) | 0.098 (17) | −0.053 (14) | −0.022 (14) | 0.035 (12) |
C1 | 0.038 (10) | 0.046 (10) | 0.060 (12) | 0.004 (9) | −0.018 (9) | 0.028 (9) |
C2 | 0.028 (9) | 0.030 (9) | 0.060 (11) | −0.002 (7) | −0.011 (8) | 0.018 (8) |
C3 | 0.047 (10) | 0.037 (9) | 0.025 (8) | −0.024 (8) | −0.011 (8) | 0.012 (7) |
C4 | 0.039 (9) | 0.014 (7) | 0.031 (8) | −0.006 (7) | −0.001 (7) | 0.011 (6) |
C5 | 0.039 (10) | 0.029 (8) | 0.042 (9) | −0.023 (8) | −0.015 (8) | 0.014 (7) |
C6 | 0.024 (8) | 0.017 (7) | 0.028 (8) | −0.005 (6) | −0.003 (7) | −0.007 (6) |
C7 | 0.027 (9) | 0.032 (8) | 0.040 (10) | 0.007 (7) | 0.007 (8) | 0.008 (7) |
C8 | 0.040 (10) | 0.018 (7) | 0.044 (10) | −0.008 (7) | −0.001 (8) | 0.010 (7) |
C9 | 0.065 (13) | 0.054 (12) | 0.074 (13) | −0.048 (11) | −0.022 (11) | 0.025 (10) |
C10 | 0.040 (12) | 0.090 (16) | 0.074 (14) | −0.023 (12) | −0.020 (11) | 0.035 (12) |
C13 | 0.041 (10) | 0.029 (8) | 0.036 (9) | −0.010 (8) | −0.013 (8) | 0.013 (7) |
C14 | 0.031 (9) | 0.030 (8) | 0.060 (11) | −0.016 (7) | −0.013 (8) | 0.026 (8) |
C15 | 0.043 (10) | 0.021 (8) | 0.069 (12) | −0.009 (8) | 0.000 (9) | 0.011 (8) |
Cl1 | 0.058 (3) | 0.028 (2) | 0.053 (3) | −0.013 (2) | −0.001 (2) | 0.0053 (18) |
Cl2 | 0.053 (3) | 0.047 (3) | 0.071 (3) | −0.020 (2) | −0.004 (3) | 0.013 (2) |
Cl3 | 0.071 (3) | 0.045 (3) | 0.050 (3) | −0.021 (2) | 0.003 (2) | 0.013 (2) |
Cl4 | 0.047 (3) | 0.031 (2) | 0.077 (3) | −0.006 (2) | −0.002 (2) | 0.016 (2) |
Co01 | 0.0444 (15) | 0.0261 (11) | 0.0492 (14) | −0.0093 (11) | −0.0038 (12) | 0.0124 (10) |
S1 | 0.030 (2) | 0.044 (3) | 0.076 (3) | −0.011 (2) | −0.013 (2) | 0.028 (2) |
S2 | 0.035 (2) | 0.032 (2) | 0.060 (3) | −0.014 (2) | −0.002 (2) | 0.024 (2) |
S3 | 0.032 (2) | 0.038 (2) | 0.044 (2) | −0.0170 (19) | −0.005 (2) | 0.0166 (18) |
S4 | 0.030 (2) | 0.027 (2) | 0.048 (3) | −0.0129 (18) | −0.0060 (19) | 0.0179 (17) |
S5 | 0.030 (2) | 0.031 (2) | 0.050 (3) | −0.0120 (18) | −0.004 (2) | 0.0195 (18) |
S6 | 0.030 (2) | 0.030 (2) | 0.053 (3) | −0.0170 (18) | −0.007 (2) | 0.0143 (18) |
S7 | 0.033 (2) | 0.035 (2) | 0.047 (3) | −0.011 (2) | −0.002 (2) | 0.0167 (19) |
S8 | 0.034 (2) | 0.043 (2) | 0.053 (3) | −0.012 (2) | −0.010 (2) | 0.019 (2) |
S9 | 0.060 (3) | 0.052 (3) | 0.065 (3) | −0.034 (3) | −0.014 (3) | 0.030 (2) |
S10 | 0.058 (3) | 0.030 (2) | 0.105 (4) | 0.003 (2) | −0.008 (3) | 0.030 (3) |
S11 | 0.041 (3) | 0.044 (3) | 0.075 (3) | −0.019 (2) | −0.015 (2) | 0.031 (2) |
S12 | 0.035 (2) | 0.038 (2) | 0.062 (3) | −0.015 (2) | −0.009 (2) | 0.018 (2) |
C11—C12 | 1.527 (10) | C7—C8 | 1.35 (2) |
C11—S9 | 1.772 (17) | C7—S7 | 1.723 (14) |
C11—H11A | 0.9700 | C7—S5 | 1.774 (15) |
C11—H11B | 0.9700 | C8—S6 | 1.717 (14) |
C12—S10 | 1.782 (9) | C8—S8 | 1.735 (16) |
C12—H12A | 0.9700 | C9—C10 | 1.42 (2) |
C12—H12B | 0.9700 | C9—S7 | 1.786 (17) |
C1—C2 | 1.49 (2) | C9—H9A | 0.9700 |
C1—S1 | 1.803 (16) | C9—H9B | 0.9700 |
C1—H1A | 0.9700 | C10—S8 | 1.791 (17) |
C1—H1B | 0.9700 | C10—H10A | 0.9700 |
C2—S2 | 1.818 (15) | C10—H10B | 0.9700 |
C2—H2A | 0.9700 | C13—C14 | 1.36 (2) |
C2—H2B | 0.9700 | C13—S11 | 1.708 (14) |
C3—C4 | 1.333 (19) | C13—S9 | 1.771 (15) |
C3—S3 | 1.738 (14) | C14—S12 | 1.719 (14) |
C3—S1 | 1.747 (16) | C14—S10 | 1.720 (15) |
C4—S4 | 1.739 (14) | C15—C15i | 1.46 (3) |
C4—S2 | 1.756 (13) | C15—S12 | 1.672 (17) |
C5—C6 | 1.416 (18) | C15—S11 | 1.679 (16) |
C5—S3 | 1.708 (15) | Co1—Cl1 | 2.296 (5) |
C5—S4 | 1.708 (13) | Co1—Cl2 | 2.265 (5) |
C6—S6 | 1.706 (14) | Co1—Cl3 | 2.259 (5) |
C6—S5 | 1.720 (13) | Co1—Cl4 | 2.276 (5) |
C12—C11—S9 | 112.6 (14) | S6—C8—S8 | 115.0 (9) |
C12—C11—H11A | 109.1 | C10—C9—S7 | 117.0 (15) |
S9—C11—H11A | 109.1 | C10—C9—H9A | 108.0 |
C12—C11—H11B | 109.1 | S7—C9—H9A | 108.0 |
S9—C11—H11B | 109.1 | C10—C9—H9B | 108.0 |
H11A—C11—H11B | 107.8 | S7—C9—H9B | 108.0 |
C11—C12—S10 | 117.6 (12) | H9A—C9—H9B | 107.3 |
C11—C12—H12A | 107.9 | C9—C10—S8 | 119.3 (14) |
S10—C12—H12A | 107.9 | C9—C10—H10A | 107.5 |
C11—C12—H12B | 107.9 | S8—C10—H10A | 107.5 |
S10—C12—H12B | 107.9 | C9—C10—H10B | 107.5 |
H12A—C12—H12B | 107.2 | S8—C10—H10B | 107.5 |
C2—C1—S1 | 114.6 (12) | H10A—C10—H10B | 107.0 |
C2—C1—H1A | 108.6 | C14—C13—S11 | 117.8 (11) |
S1—C1—H1A | 108.6 | C14—C13—S9 | 123.2 (11) |
C2—C1—H1B | 108.6 | S11—C13—S9 | 119.0 (9) |
S1—C1—H1B | 108.6 | C13—C14—S12 | 113.9 (11) |
H1A—C1—H1B | 107.6 | C13—C14—S10 | 130.2 (11) |
C1—C2—S2 | 117.9 (11) | S12—C14—S10 | 115.8 (9) |
C1—C2—H2A | 107.8 | C15i—C15—S12 | 121.2 (17) |
S2—C2—H2A | 107.8 | C15i—C15—S11 | 122.1 (17) |
C1—C2—H2B | 107.8 | S12—C15—S11 | 116.7 (8) |
S2—C2—H2B | 107.8 | Cl3—Co01—Cl2 | 110.4 (2) |
H2A—C2—H2B | 107.2 | Cl3—Co01—Cl4 | 110.28 (19) |
C4—C3—S3 | 116.7 (12) | Cl2—Co01—Cl4 | 106.69 (18) |
C4—C3—S1 | 129.2 (11) | Cl3—Co01—Cl1 | 105.49 (17) |
S3—C3—S1 | 114.1 (8) | Cl2—Co01—Cl1 | 107.4 (2) |
C3—C4—S4 | 116.9 (10) | Cl4—Co01—Cl1 | 116.55 (19) |
C3—C4—S2 | 128.5 (12) | C3—S1—C1 | 103.6 (7) |
S4—C4—S2 | 114.6 (8) | C4—S2—C2 | 99.8 (7) |
C6—C5—S3 | 122.8 (10) | C5—S3—C3 | 95.1 (7) |
C6—C5—S4 | 120.8 (11) | C5—S4—C4 | 95.0 (7) |
S3—C5—S4 | 116.3 (8) | C6—S5—C7 | 95.2 (7) |
C5—C6—S6 | 123.3 (10) | C6—S6—C8 | 96.0 (7) |
C5—C6—S5 | 120.7 (11) | C7—S7—C9 | 98.3 (8) |
S6—C6—S5 | 116.0 (8) | C8—S8—C10 | 101.3 (8) |
C8—C7—S7 | 131.0 (12) | C13—S9—C11 | 97.4 (8) |
C8—C7—S5 | 114.8 (11) | C14—S10—C12 | 103.2 (8) |
S7—C7—S5 | 114.2 (9) | C15—S11—C13 | 94.8 (7) |
C7—C8—S6 | 118.0 (12) | C15—S12—C14 | 96.2 (7) |
C7—C8—S8 | 127.0 (11) | ||
S9—C11—C12—S10 | 61 (2) | C3—C4—S4—C5 | −3.4 (14) |
S1—C1—C2—S2 | −63.6 (17) | S2—C4—S4—C5 | 175.8 (9) |
S3—C3—C4—S4 | 3.4 (18) | C5—C6—S5—C7 | 178.4 (12) |
S1—C3—C4—S4 | −178.5 (10) | S6—C6—S5—C7 | −2.0 (9) |
S3—C3—C4—S2 | −175.7 (9) | C8—C7—S5—C6 | 0.7 (14) |
S1—C3—C4—S2 | 2 (2) | S7—C7—S5—C6 | −178.4 (9) |
S3—C5—C6—S6 | 178.5 (9) | C5—C6—S6—C8 | −178.0 (13) |
S4—C5—C6—S6 | 2.7 (19) | S5—C6—S6—C8 | 2.4 (9) |
S3—C5—C6—S5 | −1.9 (18) | C7—C8—S6—C6 | −2.0 (14) |
S4—C5—C6—S5 | −177.7 (8) | S8—C8—S6—C6 | 177.8 (9) |
S7—C7—C8—S6 | 179.7 (10) | C8—C7—S7—C9 | −18.6 (19) |
S5—C7—C8—S6 | 0.9 (18) | S5—C7—S7—C9 | 160.3 (10) |
S7—C7—C8—S8 | 0 (3) | C10—C9—S7—C7 | 49.3 (16) |
S5—C7—C8—S8 | −178.9 (9) | C7—C8—S8—C10 | −3.3 (18) |
S7—C9—C10—S8 | −64 (2) | S6—C8—S8—C10 | 176.9 (10) |
S11—C13—C14—S12 | 4.6 (19) | C9—C10—S8—C8 | 35.6 (19) |
S9—C13—C14—S12 | −174.7 (9) | C14—C13—S9—C11 | 34.6 (17) |
S11—C13—C14—S10 | −176.7 (11) | S11—C13—S9—C11 | −144.8 (10) |
S9—C13—C14—S10 | 4 (3) | C12—C11—S9—C13 | −64.9 (14) |
C4—C3—S1—C1 | −8.6 (18) | C13—C14—S10—C12 | −17 (2) |
S3—C3—S1—C1 | 169.6 (9) | S12—C14—S10—C12 | 161.7 (11) |
C2—C1—S1—C3 | 37.9 (15) | C11—C12—S10—C14 | −17 (2) |
C3—C4—S2—C2 | −17.8 (17) | C15i—C15—S11—C13 | 177 (2) |
S4—C4—S2—C2 | 163.1 (9) | S12—C15—S11—C13 | −5.1 (12) |
C1—C2—S2—C4 | 49.0 (14) | C14—C13—S11—C15 | 0.1 (15) |
C6—C5—S3—C3 | −176.9 (13) | S9—C13—S11—C15 | 179.5 (11) |
S4—C5—S3—C3 | −0.9 (11) | C15i—C15—S12—C14 | −175 (2) |
C4—C3—S3—C5 | −1.4 (14) | S11—C15—S12—C14 | 7.2 (12) |
S1—C3—S3—C5 | −179.9 (9) | C13—C14—S12—C15 | −6.9 (15) |
C6—C5—S4—C4 | 178.4 (13) | S10—C14—S12—C15 | 174.3 (11) |
S3—C5—S4—C4 | 2.3 (11) |
Symmetry code: (i) −x+1, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···Cl1ii | 0.97 | 2.55 | 3.494 (16) | 165 |
C1—H1B···Cl2iii | 0.97 | 2.83 | 3.591 (16) | 136 |
C10—H10A···Cl4iv | 0.97 | 2.78 | 3.57 (2) | 139 |
Symmetry codes: (ii) −x+1, −y+1, −z+2; (iii) −x, −y+1, −z+2; (iv) x−1, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | (C10H8S8)3[CoCl4]2 |
Mr | 1555.39 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 6.7904 (19), 9.6402 (18), 20.499 (4) |
α, β, γ (°) | 86.280 (14), 89.967 (19), 78.456 (19) |
V (Å3) | 1311.9 (5) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 2.03 |
Crystal size (mm) | 0.22 × 0.18 × 0.10 |
Data collection | |
Diffractometer | Bruker P4 diffractometer |
Absorption correction | ψ scan (XSCANS; Bruker, 1996) |
Tmin, Tmax | 0.652, 0.816 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6527, 5159, 1927 |
Rint | 0.094 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.100, 0.281, 0.92 |
No. of reflections | 5159 |
No. of parameters | 289 |
No. of restraints | 8 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.91, −1.06 |
Computer programs: XSCANS (Bruker, 1996), SIR (Altomare et al., 1999), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···Cl1i | 0.97 | 2.55 | 3.494 (16) | 165 |
C1—H1B···Cl2ii | 0.97 | 2.83 | 3.591 (16) | 136 |
C10—H10A···Cl4iii | 0.97 | 2.78 | 3.57 (2) | 139 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) −x, −y+1, −z+2; (iii) x−1, y+1, z. |
Acknowledgements
This work was supported by National Natural Science Foundation of China (grant No. 50673054).
References
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There is a large variety of quasi-two-dimensional organic conductors based on the radical cation salts of bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) which also is abbreviated to ET. They show a wealth of structural modifications, but the conducting properties of the radical salts are essentially determined by the packing patterns of their BEDT-TTF layers (Shibaeva & Yagubskii, 2004). So, according to packing patterns of the BEDT-TTF layers in the various crystal structure, it is customary classified as α, β, δ, χ and so on. (Mori, 1998; Mori, 1999; Mori et al., 1999)
In the title structure, (I), the unit cell contains three ET donors and two anions. Since one BEDT-TTF molecule (ETA) and [CoCl4]2- anion are on general positions, and the other BEDT-TTF molecule (ETB) is positioned on an inversion center, the crystallographically independent molecules are 1.5 ET molecules and one [CoCl4]2- anion (Fig. 1). The [CoCl4]2- anion shows a slightly distorted tetrahedral configuration (Table 1). The two independent ET molecules have different molecular configuration. In the ETA, the terminal ethylene C2 and C9 atoms extend from the molecular plane with deviations of -0.499 (16) Å and -0.579 (18) Å, but C1 and C10 atoms [with deviations of 0.169 (17) Å and 0.057 (19) Å] almost share the same plane with the rest of the molecule. ETA shows a boat conformation in which C2 and C9 are on the both sides of the molecular plane. Otherwise, ETB shows a chair conformation in which C11 and C12 deviate from the molecular plane by 0.658 (18) Å and 0.02 (2) Å respectively and the inversion center positioned on the middle of the C15—C15A bond. The dihedral angle between the molecular planes of ETA and ETB is 16.88 (16)° and their molecular planes make angles of 43.93 (10)° and 27.10 (13)° with [010] directions respectively.
ETA and ETB form stack A and stack B along the b axis in a face to face manner with different intra-stack packing modes. In the stack A, ETA molecules are dimerized and the intra-stack packing mode alternates between the ROB [ring over bond, ET molecules stack on top of each other with a relative displacement between stacking moleculaes along their long in-plane axes] and ROA [ring over atom, ET molecules stack on above or below with a large displacement betweentacking moleculaes along their short in-plane axes] modes, as defined by Williams et al. (1984). The mean interplannar distance in the dimersied ET molecules is 3.606 Å and between the dimerized is 3.082 Å. There are three kinds of intra-dimer S···S short distances within each dimmer shorter than the combined van der Walls radii of two sulfur atoms (3.60 Å), but there are no obvious inter-dimer S···S short contacts between the dimers. Stack B contains only ETB molecules overlapped with ROB mode, and there are no intrastack S···S short contacts. The mean interplannar distance in stack B is 4.392 Å.
Stack A and Stack B form layer A and layer B in the ab plane respectively and these layers are interleaved by the inorganic anions. In layer A, one ET molecule has four pairs of inter-stack S···S short contacts between the stacks in the a-direction [S1···S2 = 3.518 (6) Å, S1···S4 = 3.562 (6) Å, S7···S8 = 3.549 (6) Å] as shown in Fig. 2. Combined with intra-stack S···S short contacts within Stack A, it is suggested that the possibility of a quasi-two-dimensional interaction in the ab-plane. In contrast to the layer A, there are no S···S distance are shorter than the sum of van der Walls radii of two sulfur atoms in the layer B, which indicates the absence of any intermolecular interaction in the layer B.
Between layer A and layer B, there are layers of [CoCl4]2- anions, which engage in ionic donor-anion interactions. The anions sandwich the layers A and layers B along the c axis. The [CoCl4]2- anions are situated in the so called 'anion cavity', which is bonded by the terminal ethylene groups of the ET cations. Short C—H···Cl interactions (Table 2) probably stabilize the crystal structure.
Among the molecular conductors based on the ET, there are three major determinant of packing of a crystal: (1) the ET network packing motif; (2) the anion layer motif; and (3) the interatomic environment at the interface of the donor and anion layers. For the larger size of the ET and fractional charge on it, the coulomb interaction between the ET cations and anions is inferior to the π-π interaction. In the title crystal, the ET molecules form poly-ET cations by the π-π interaction and [CoCl4]2- anions fill the cavity formed by the ethylene groups of the surrounding ET molecules to balance charge. Hence, the 'anion cavity' is mainly determined by the ET packing motif where the 'anion cavity' is a trigonal channel along the [100] directions. If the size of anion is not enough to fill the anion cavity, the solvent molecules will be crystallized in the crystal to stabilize the structure, such as TCE(1,1,2-trichloroethane) molecules in the crystal α-ET3(CoCl4)(TCE)(Mori et al., 2002). In the crystal α-ET3(CoCl4)(TCE), the oxidation on ET molecules is lower than that in the title compound, where only one [CoCl4]2- anion is needed to balance charge, so the TCE solvent molecules are filled in the 'anion cavity' together. At the same time, if some of the anions are replaced by the other anion with same geometry, size and charge, the crystal structure will be an isomorphic structure, for example, β-(ET)3(CoCl4)1.34(GaCl4)0.66, α-ET3(CoCl4)0.38(CoCl4)0.62(TCE) (Mori et al., 2002). On the other hand, the oxidation on ET molecules and the interaction between the anions and the ethylene groups of the ET will significant affect the packing motif of the ET cations, so the ET packing motif of the title crystal belongs to β' and ET3(CoCl4)(TCE) belongs to α. But the 'anion cavity' formed by the ET cations as above two packing motif are nearly same.