Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807018041/ln3051sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807018041/ln3051Isup2.hkl |
CCDC reference: 663601
4,4'-dimethyl-2,2'-bipyridine was commercially available and was used as received without further purification. This compound (0.0184 g, 0.1 mmol), together with a saturated potassium iodide solution containing copper(I) iodide (0.0190 g, 0.1 mmol), were dissolved in water (10 ml). Then the solution was placed and sealed in a 15 ml Teflon-lined stainless steel reactor and heated to 453 K for 72 h, then cooled down to room temperature at a rate of 5 K/h. Red block crystals were formed in about 50% yield.
H atoms were placed in calculated positions (C—H 0.93 Å; Uiso(H) = 1.2Ueq(C) for the ring H atoms and C—H 0.96 Å; Uiso(H) = 1.5Ueq(C) for the methyl groups) and were included in the refinement in the riding model approximation. The largest peak in the final difference map was 0.95 Å from atom I2.
4,4'-Dimethyl-2,2'-bipyridine, a commercially available bidentate chelating heterocyclic ligand, furnishes complexes from a large range of metal salts. The structure of the binuclear title compound, (I), obtained from copper(I) iodide is shown in Fig. 1. Each Cu atom is chelated by the heterocycle and two µ2-I atoms in a four-coordinate environment and shows tetrahedron geometry (Fig. 1). The two Cu—I bond lengths [2.5948 (9) and 2.6307 (9) Å] are comparable with those reported earlier (Kutoglu et al., 1991). The molecule has crystallographic mirror
symmetry and the structure is a binuclear layer compound. The two copper(I) atoms are separated by a distance of 2.5274 (14) Å indicating a strong CuI···CuI interaction, which is comparable with the CuI···CuI distance found previously (Che et al., 2000; Hou et al., 2004).
For related literature, see Che et al. (2000); Hou et al. (2004); Kutoglu et al. (1991).
Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97.
[Cu2I2(C12H12N2)2] | F(000) = 1440 |
Mr = 749.35 | Dx = 1.854 Mg m−3 |
Orthorhombic, Pnma | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2n | Cell parameters from 2945 reflections |
a = 11.162 (2) Å | θ = 2.2–24.9° |
b = 17.432 (4) Å | µ = 3.90 mm−1 |
c = 13.794 (3) Å | T = 295 K |
V = 2684.0 (10) Å3 | Block, red |
Z = 4 | 0.18 × 0.16 × 0.15 mm |
Bruker APEX area-detector diffractometer | 3178 independent reflections |
Radiation source: fine-focus sealed tube | 2373 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
φ and ω scans | θmax = 27.5°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | h = −14→14 |
Tmin = 0.403, Tmax = 0.557 | k = −21→22 |
15856 measured reflections | l = −8→17 |
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)] = 0.050 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.129 | H-atom parameters constrained |
S = 1.10 | w = 1/[σ2(Fo2) + (0.0571P)2 + 3.2733P] where P = (Fo2 + 2Fc2)/3 |
3178 reflections | (Δ/σ)max = 0.001 |
150 parameters | Δρmax = 1.53 e Å−3 |
0 restraints | Δρmin = −0.78 e Å−3 |
[Cu2I2(C12H12N2)2] | V = 2684.0 (10) Å3 |
Mr = 749.35 | Z = 4 |
Orthorhombic, Pnma | Mo Kα radiation |
a = 11.162 (2) Å | µ = 3.90 mm−1 |
b = 17.432 (4) Å | T = 295 K |
c = 13.794 (3) Å | 0.18 × 0.16 × 0.15 mm |
Bruker APEX area-detector diffractometer | 3178 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | 2373 reflections with I > 2σ(I) |
Tmin = 0.403, Tmax = 0.557 | Rint = 0.031 |
15856 measured reflections |
R[F2 > 2σ(F2)] = 0.050 | 0 restraints |
wR(F2) = 0.129 | H-atom parameters constrained |
S = 1.10 | Δρmax = 1.53 e Å−3 |
3178 reflections | Δρmin = −0.78 e Å−3 |
150 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 | ||
Cu1 | 0.00472 (7) | 0.32249 (4) | 0.35891 (5) | 0.0652 (2) | |
I1 | 0.02234 (5) | 0.2500 | 0.19524 (4) | 0.05818 (19) | |
I2 | −0.04114 (7) | 0.2500 | 0.52201 (4) | 0.0760 (2) | |
N1 | 0.1340 (4) | 0.4068 (2) | 0.3767 (3) | 0.0523 (10) | |
N2 | −0.1010 (4) | 0.4200 (2) | 0.3583 (3) | 0.0484 (10) | |
C1 | 0.2528 (5) | 0.3975 (4) | 0.3846 (4) | 0.0640 (15) | |
H1A | 0.2840 | 0.3481 | 0.3809 | 0.077* | |
C2 | 0.3299 (5) | 0.4571 (4) | 0.3978 (4) | 0.0695 (16) | |
H2A | 0.4116 | 0.4474 | 0.4025 | 0.083* | |
C3 | 0.2893 (5) | 0.5313 (3) | 0.4042 (4) | 0.0603 (14) | |
C4 | 0.1643 (5) | 0.5412 (3) | 0.3960 (3) | 0.0519 (12) | |
H4A | 0.1312 | 0.5900 | 0.4006 | 0.062* | |
C5 | 0.0911 (4) | 0.4788 (3) | 0.3812 (3) | 0.0436 (10) | |
C6 | −0.0402 (4) | 0.4862 (3) | 0.3683 (3) | 0.0428 (10) | |
C7 | −0.0989 (5) | 0.5568 (3) | 0.3662 (3) | 0.0493 (12) | |
H7A | −0.0552 | 0.6019 | 0.3730 | 0.059* | |
C8 | −0.2214 (5) | 0.5600 (3) | 0.3542 (4) | 0.0554 (13) | |
C9 | −0.2824 (5) | 0.4923 (3) | 0.3449 (4) | 0.0591 (14) | |
H9A | −0.3651 | 0.4923 | 0.3370 | 0.071* | |
C10 | −0.2196 (5) | 0.4238 (3) | 0.3473 (4) | 0.0554 (13) | |
H10A | −0.2622 | 0.3782 | 0.3410 | 0.066* | |
C11 | 0.3689 (6) | 0.5995 (4) | 0.4184 (5) | 0.090 (2) | |
H11A | 0.4424 | 0.5836 | 0.4484 | 0.136* | |
H11B | 0.3293 | 0.6362 | 0.4593 | 0.136* | |
H11C | 0.3859 | 0.6225 | 0.3567 | 0.136* | |
C12 | −0.2839 (6) | 0.6367 (3) | 0.3491 (5) | 0.0819 (19) | |
H12A | −0.2307 | 0.6741 | 0.3216 | 0.123* | |
H12B | −0.3067 | 0.6525 | 0.4132 | 0.123* | |
H12C | −0.3541 | 0.6323 | 0.3093 | 0.123* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.0990 (6) | 0.0276 (3) | 0.0688 (5) | 0.0008 (3) | 0.0047 (4) | −0.0003 (3) |
I1 | 0.0780 (4) | 0.0420 (3) | 0.0545 (3) | 0.000 | 0.0019 (2) | 0.000 |
I2 | 0.1387 (6) | 0.0316 (3) | 0.0577 (4) | 0.000 | 0.0104 (3) | 0.000 |
N1 | 0.069 (3) | 0.038 (2) | 0.051 (2) | 0.0070 (19) | 0.003 (2) | 0.0018 (18) |
N2 | 0.067 (3) | 0.0310 (19) | 0.048 (2) | −0.0040 (18) | 0.0057 (19) | −0.0018 (16) |
C1 | 0.076 (4) | 0.060 (3) | 0.056 (3) | 0.017 (3) | −0.002 (3) | 0.002 (3) |
C2 | 0.051 (3) | 0.099 (5) | 0.058 (4) | 0.011 (3) | −0.004 (3) | 0.005 (3) |
C3 | 0.064 (4) | 0.066 (4) | 0.051 (3) | −0.006 (3) | 0.000 (2) | 0.000 (3) |
C4 | 0.066 (3) | 0.042 (3) | 0.048 (3) | −0.003 (2) | 0.004 (2) | −0.003 (2) |
C5 | 0.060 (3) | 0.037 (2) | 0.034 (2) | 0.003 (2) | 0.002 (2) | 0.0001 (18) |
C6 | 0.060 (3) | 0.034 (2) | 0.035 (2) | −0.001 (2) | 0.004 (2) | 0.0002 (18) |
C7 | 0.062 (3) | 0.032 (2) | 0.054 (3) | −0.001 (2) | 0.003 (2) | −0.005 (2) |
C8 | 0.064 (3) | 0.049 (3) | 0.052 (3) | 0.008 (2) | 0.005 (2) | 0.000 (2) |
C9 | 0.052 (3) | 0.068 (4) | 0.057 (3) | −0.005 (3) | 0.007 (2) | 0.003 (3) |
C10 | 0.068 (4) | 0.048 (3) | 0.050 (3) | −0.013 (3) | 0.003 (3) | 0.000 (2) |
C11 | 0.064 (4) | 0.106 (5) | 0.101 (5) | −0.024 (4) | −0.003 (4) | −0.006 (4) |
C12 | 0.079 (4) | 0.062 (4) | 0.105 (5) | 0.020 (3) | 0.002 (4) | −0.002 (4) |
Cu1—N2 | 2.069 (4) | C4—H4A | 0.9300 |
Cu1—N1 | 2.074 (4) | C5—C6 | 1.482 (7) |
Cu1—Cu1i | 2.5274 (14) | C6—C7 | 1.394 (6) |
Cu1—I1 | 2.5948 (9) | C7—C8 | 1.379 (7) |
Cu1—I2 | 2.6307 (9) | C7—H7A | 0.9300 |
N1—C1 | 1.341 (7) | C8—C9 | 1.369 (7) |
N1—C5 | 1.345 (6) | C8—C12 | 1.509 (7) |
N2—C10 | 1.334 (7) | C9—C10 | 1.385 (7) |
N2—C6 | 1.347 (6) | C9—H9A | 0.9300 |
C1—C2 | 1.361 (8) | C10—H10A | 0.9300 |
C1—H1A | 0.9300 | C11—H11A | 0.9600 |
C2—C3 | 1.374 (8) | C11—H11B | 0.9600 |
C2—H2A | 0.9300 | C11—H11C | 0.9600 |
C3—C4 | 1.411 (8) | C12—H12A | 0.9600 |
C3—C11 | 1.497 (8) | C12—H12B | 0.9600 |
C4—C5 | 1.375 (6) | C12—H12C | 0.9600 |
N2—Cu1—N1 | 79.37 (16) | N1—C5—C4 | 122.2 (5) |
N2—Cu1—Cu1i | 145.23 (12) | N1—C5—C6 | 115.4 (4) |
N1—Cu1—Cu1i | 135.10 (11) | C4—C5—C6 | 122.4 (4) |
N2—Cu1—I1 | 116.08 (11) | N2—C6—C7 | 121.2 (4) |
N1—Cu1—I1 | 113.27 (12) | N2—C6—C5 | 115.8 (4) |
Cu1i—Cu1—I1 | 60.855 (17) | C7—C6—C5 | 123.0 (4) |
N2—Cu1—I2 | 106.69 (11) | C8—C7—C6 | 120.3 (5) |
N1—Cu1—I2 | 112.00 (12) | C8—C7—H7A | 119.8 |
Cu1i—Cu1—I2 | 61.290 (17) | C6—C7—H7A | 119.8 |
I1—Cu1—I2 | 121.66 (3) | C9—C8—C7 | 118.0 (5) |
Cu1—I1—Cu1i | 58.29 (3) | C9—C8—C12 | 122.0 (5) |
Cu1i—I2—Cu1 | 57.42 (3) | C7—C8—C12 | 120.0 (5) |
C1—N1—C5 | 117.5 (5) | C8—C9—C10 | 119.4 (5) |
C1—N1—Cu1 | 127.8 (4) | C8—C9—H9A | 120.3 |
C5—N1—Cu1 | 114.8 (3) | C10—C9—H9A | 120.3 |
C10—N2—C6 | 118.0 (4) | N2—C10—C9 | 123.2 (5) |
C10—N2—Cu1 | 127.4 (3) | N2—C10—H10A | 118.4 |
C6—N2—Cu1 | 114.6 (3) | C9—C10—H10A | 118.4 |
N1—C1—C2 | 122.9 (5) | C3—C11—H11A | 109.5 |
N1—C1—H1A | 118.5 | C3—C11—H11B | 109.5 |
C2—C1—H1A | 118.5 | H11A—C11—H11B | 109.5 |
C1—C2—C3 | 121.3 (5) | C3—C11—H11C | 109.5 |
C1—C2—H2A | 119.3 | H11A—C11—H11C | 109.5 |
C3—C2—H2A | 119.3 | H11B—C11—H11C | 109.5 |
C2—C3—C4 | 115.8 (5) | C8—C12—H12A | 109.5 |
C2—C3—C11 | 124.1 (6) | C8—C12—H12B | 109.5 |
C4—C3—C11 | 120.0 (5) | H12A—C12—H12B | 109.5 |
C5—C4—C3 | 120.2 (5) | C8—C12—H12C | 109.5 |
C5—C4—H4A | 119.9 | H12A—C12—H12C | 109.5 |
C3—C4—H4A | 119.9 | H12B—C12—H12C | 109.5 |
N2—Cu1—I1—Cu1i | −140.73 (13) | C1—C2—C3—C11 | −179.8 (6) |
N1—Cu1—I1—Cu1i | 130.02 (12) | C2—C3—C4—C5 | −0.8 (8) |
I2—Cu1—I1—Cu1i | −8.08 (5) | C11—C3—C4—C5 | 178.8 (5) |
N2—Cu1—I2—Cu1i | 144.44 (12) | C1—N1—C5—C4 | −1.7 (7) |
N1—Cu1—I2—Cu1i | −130.53 (12) | Cu1—N1—C5—C4 | 177.8 (4) |
I1—Cu1—I2—Cu1i | 8.04 (4) | C1—N1—C5—C6 | 177.7 (4) |
N2—Cu1—N1—C1 | −179.2 (5) | Cu1—N1—C5—C6 | −2.7 (5) |
Cu1i—Cu1—N1—C1 | 6.2 (5) | C3—C4—C5—N1 | 1.8 (7) |
I1—Cu1—N1—C1 | −65.2 (5) | C3—C4—C5—C6 | −177.6 (4) |
I2—Cu1—N1—C1 | 77.0 (5) | C10—N2—C6—C7 | −0.7 (7) |
N2—Cu1—N1—C5 | 1.4 (3) | Cu1—N2—C6—C7 | 178.0 (3) |
Cu1i—Cu1—N1—C5 | −173.3 (2) | C10—N2—C6—C5 | 179.4 (4) |
I1—Cu1—N1—C5 | 115.3 (3) | Cu1—N2—C6—C5 | −1.9 (5) |
I2—Cu1—N1—C5 | −102.5 (3) | N1—C5—C6—N2 | 3.1 (6) |
N1—Cu1—N2—C10 | 178.9 (4) | C4—C5—C6—N2 | −177.5 (4) |
Cu1i—Cu1—N2—C10 | −7.7 (5) | N1—C5—C6—C7 | −176.8 (4) |
I1—Cu1—N2—C10 | 68.1 (4) | C4—C5—C6—C7 | 2.7 (7) |
I2—Cu1—N2—C10 | −71.1 (4) | N2—C6—C7—C8 | 0.3 (7) |
N1—Cu1—N2—C6 | 0.3 (3) | C5—C6—C7—C8 | −179.8 (4) |
Cu1i—Cu1—N2—C6 | 173.7 (2) | C6—C7—C8—C9 | 0.2 (8) |
I1—Cu1—N2—C6 | −110.5 (3) | C6—C7—C8—C12 | −178.2 (5) |
I2—Cu1—N2—C6 | 110.3 (3) | C7—C8—C9—C10 | −0.3 (8) |
C5—N1—C1—C2 | 0.6 (8) | C12—C8—C9—C10 | 178.1 (5) |
Cu1—N1—C1—C2 | −178.8 (4) | C6—N2—C10—C9 | 0.6 (7) |
N1—C1—C2—C3 | 0.3 (9) | Cu1—N2—C10—C9 | −177.9 (4) |
C1—C2—C3—C4 | −0.2 (8) | C8—C9—C10—N2 | −0.1 (8) |
Symmetry code: (i) x, −y+1/2, z. |
Experimental details
Crystal data | |
Chemical formula | [Cu2I2(C12H12N2)2] |
Mr | 749.35 |
Crystal system, space group | Orthorhombic, Pnma |
Temperature (K) | 295 |
a, b, c (Å) | 11.162 (2), 17.432 (4), 13.794 (3) |
V (Å3) | 2684.0 (10) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.90 |
Crystal size (mm) | 0.18 × 0.16 × 0.15 |
Data collection | |
Diffractometer | Bruker APEX area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2002) |
Tmin, Tmax | 0.403, 0.557 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15856, 3178, 2373 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.050, 0.129, 1.10 |
No. of reflections | 3178 |
No. of parameters | 150 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.53, −0.78 |
Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), SAINT, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), PLATON (Spek, 2003), SHELXL97.
Cu1—N2 | 2.069 (4) | Cu1—I1 | 2.5948 (9) |
Cu1—N1 | 2.074 (4) | Cu1—I2 | 2.6307 (9) |
Cu1—Cu1i | 2.5274 (14) | ||
N2—Cu1—N1 | 79.37 (16) | N2—Cu1—I2 | 106.69 (11) |
N2—Cu1—I1 | 116.08 (11) | N1—Cu1—I2 | 112.00 (12) |
N1—Cu1—I1 | 113.27 (12) | I1—Cu1—I2 | 121.66 (3) |
Symmetry code: (i) x, −y+1/2, z. |
4,4'-Dimethyl-2,2'-bipyridine, a commercially available bidentate chelating heterocyclic ligand, furnishes complexes from a large range of metal salts. The structure of the binuclear title compound, (I), obtained from copper(I) iodide is shown in Fig. 1. Each Cu atom is chelated by the heterocycle and two µ2-I atoms in a four-coordinate environment and shows tetrahedron geometry (Fig. 1). The two Cu—I bond lengths [2.5948 (9) and 2.6307 (9) Å] are comparable with those reported earlier (Kutoglu et al., 1991). The molecule has crystallographic mirror
symmetry and the structure is a binuclear layer compound. The two copper(I) atoms are separated by a distance of 2.5274 (14) Å indicating a strong CuI···CuI interaction, which is comparable with the CuI···CuI distance found previously (Che et al., 2000; Hou et al., 2004).