metal-organic compounds
catena-Poly[[[diiodidocadmium(II)]-μ-1-(4-pyridylmethyl)-1H-benzimidazole] methanol hemisolvate]
aDepartment of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
*Correspondence e-mail: tlhu@nankai.edu.cn
In the title coordination polymer, {[CdI2(C13H11N3)]·0.5CH4O}n, each CdII center is four-coordinated by two N-atom donors from two 1-(4-pyridylmethyl)-1H-benzimidazole (L) ligands and two iodide anions, forming a tetrahedral coordination geometry. L ligands bridge adjacent CdII ions, generating two crystallographically independent approximately orthogonal one-dimensional chains. The methanol solvent molecule associates with one of the chains via O—H⋯I interactions.
Related literature
For a review of N-containing heterocyclic aromatic compounds as bridging ligands, see: Steel (2005). For a discussion of benzimidazole ligands in complexes, see: Li et al. (2007); Meng et al. (2004). For an example of a silver coordination polymer of the present ligand, see: Huang et al. (2006). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku/MSC, 2005); cell CrystalClear (Rigaku/MSC, 2005); data reduction: CrystalClear (Rigaku/MSC, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1998); software used to prepare material for publication: SHELXTL (Bruker, 1998).
Supporting information
https://doi.org/10.1107/S1600536807061302/sq2002sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536807061302/sq2002Isup2.hkl
The ligand 1-(pyridin-4-ylmethyl)-1H-benzo[d]imidazole (L) was synthesized according to a reported method (Li et al., 2007). The reaction of L (58 mg, 0.2 mmol), NaI (30 mg, 0.2 mmol) and Cd(ClO4)2 (31 mg, 0.1 mmol) in a solution of methanol and water (v/v = 1:1,10 ml) for a few minutes afforded a white solid, which was separated by filtration. The resulting solution was kept at room temperature. Colorless single crystals suitable for X-ray analysis were obtained by slow evaporation of the solvent after several days (yield: 40%).
H atoms were included in calculated positions and treated in the subsequent
as riding atoms, with C—H = 0.93 (aromatic) and 0.97 Å (methylene) and Uiso(H) = 1.2*Ueq(C).N-containing heterocyclic aromatic compounds are extensively used as bridging ligands in coordination and metallosupramolecular chemistry (Steel, 2005). In recent years, benzimidazole groups have been used to link different alkyl or aromatic groups to form a series of bi- and multi-dentate flexible ligands, which can adopt different conformations according to the different geometric requirements of the metal centers when forming complexes (Li et al., 2007). Many complexes with these ligands show unique structural topologies and interesting properties (Meng et al., 2004). Recently, Liu and co-workers synthesized a flexible bridging ligand 1-(pyridin-4-ylmethyl)-1H-benzo[d]imidazole (L) as well as its chiral one-dimensional double helix polymer, [Ag(L)(NO3)]n (Huang et al., 2006). We herein report the
of a cadmium complex of this ligand (I).In the molecule of (I), (Fig. 1 and 2), the bond lengths and angles (Table 1) are generally within normal ranges (Allen et al., 1987). The CdII center is tetrahedrally coordinated by two N atoms from two L ligands (L = 1-(pyridin-4-ylmethyl)-1H-benzo[d]imidazole) and two iodide ions. In the extended structure of (I), the CdII centers are interconnected by L ligands to form two one-dimensional chains along two different directions (Fig. 3). The chain containing Cd1 is along the c direction and the other one containing Cd2 is along the b direction, making them essentially orthogonal. The methanol solvate molecules are associated with the Cd1 chains via O—H···I interactions.
For a review of N-containing heterocyclic aromatic compounds as bridging ligands, see: Steel (2005). For a discussion of benzimidazole ligands in complexes, see: Li et al. (2007); Meng et al. (2004). For an example of a silver coordination polymer of the present ligand, see: Huang et al. (2006). For bond-length data, see: Allen et al. (1987).
Data collection: CrystalClear (Rigaku/MSC, 2005); cell
CrystalClear (Rigaku/MSC, 2005); data reduction: CrystalClear (Rigaku/MSC, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1998); software used to prepare material for publication: SHELXTL (Bruker, 1998).Fig. 1. The coordination environment of Cd1, showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 30% probability level. [symmetry code: (A) x, 3/2 - y, 1/2 + z]. | |
Fig. 2. The coordination environment of Cd2, showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 30% probability level. [symmetry code: (B) 1 - x, -1/2 + y, 3/2 - z]. | |
Fig. 3. View of the two crystallographically independent one-dimensional chains that run along the b and c axes. |
[CdI2(C13H11N3)]·0.5CH4O | F(000) = 2184 |
Mr = 591.47 | Dx = 2.337 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 9593 reflections |
a = 17.469 (4) Å | θ = 2.7–25.0° |
b = 12.913 (3) Å | µ = 4.97 mm−1 |
c = 16.814 (3) Å | T = 293 K |
β = 117.56 (3)° | Block, colorless |
V = 3362.6 (16) Å3 | 0.10 × 0.06 × 0.04 mm |
Z = 8 |
Rigaku R-AXIS RAPID-S diffractometer | 5901 independent reflections |
Radiation source: fine-focus sealed tube | 5155 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.066 |
ω scans | θmax = 25.0°, θmin = 2.1° |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | h = −20→20 |
Tmin = 0.637, Tmax = 0.826 | k = −15→15 |
33513 measured reflections | l = −19→19 |
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)] = 0.024 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.054 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0176P)2] where P = (Fo2 + 2Fc2)/3 |
5901 reflections | (Δ/σ)max = 0.001 |
363 parameters | Δρmax = 1.49 e Å−3 |
0 restraints | Δρmin = −0.81 e Å−3 |
[CdI2(C13H11N3)]·0.5CH4O | V = 3362.6 (16) Å3 |
Mr = 591.47 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 17.469 (4) Å | µ = 4.97 mm−1 |
b = 12.913 (3) Å | T = 293 K |
c = 16.814 (3) Å | 0.10 × 0.06 × 0.04 mm |
β = 117.56 (3)° |
Rigaku R-AXIS RAPID-S diffractometer | 5901 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | 5155 reflections with I > 2σ(I) |
Tmin = 0.637, Tmax = 0.826 | Rint = 0.066 |
33513 measured reflections |
R[F2 > 2σ(F2)] = 0.024 | 0 restraints |
wR(F2) = 0.054 | H-atom parameters constrained |
S = 1.02 | Δρmax = 1.49 e Å−3 |
5901 reflections | Δρmin = −0.81 e Å−3 |
363 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 | ||
Cd1 | 0.185504 (19) | 0.46826 (2) | 0.868473 (19) | 0.01644 (8) | |
Cd2 | 0.272027 (19) | 0.52226 (2) | 0.547057 (19) | 0.01630 (8) | |
I1 | 0.356936 (18) | 0.51615 (2) | 0.948024 (19) | 0.02392 (8) | |
I2 | 0.109810 (19) | 0.27969 (2) | 0.825044 (19) | 0.02452 (8) | |
I3 | 0.2197 (2) | 0.3922 (2) | 0.6382 (2) | 0.0220 (8) | |
I4 | 0.178051 (18) | 0.61285 (2) | 0.385404 (17) | 0.02101 (8) | |
N1 | 0.1207 (2) | 0.5680 (2) | 0.7429 (2) | 0.0166 (8) | |
N2 | 0.0638 (2) | 0.8382 (2) | 0.4991 (2) | 0.0158 (8) | |
N3 | 0.1338 (2) | 0.9484 (3) | 0.4526 (2) | 0.0169 (8) | |
N4 | 0.32450 (19) | 0.6665 (2) | 0.6382 (2) | 0.0142 (8) | |
N5 | 0.4629 (2) | 0.9308 (2) | 0.8829 (2) | 0.0159 (8) | |
N6 | 0.6033 (2) | 0.9608 (3) | 0.9407 (2) | 0.0178 (8) | |
C1 | 0.1638 (2) | 0.6488 (3) | 0.7339 (3) | 0.0159 (9) | |
H1A | 0.2159 | 0.6671 | 0.7826 | 0.019* | |
C2 | 0.1355 (2) | 0.7062 (3) | 0.6570 (3) | 0.0160 (9) | |
H2A | 0.1694 | 0.7594 | 0.6531 | 0.019* | |
C3 | 0.0561 (3) | 0.6843 (3) | 0.5853 (3) | 0.0155 (9) | |
C4 | 0.0106 (3) | 0.5992 (3) | 0.5937 (3) | 0.0190 (10) | |
H4A | −0.0423 | 0.5802 | 0.5464 | 0.023* | |
C5 | 0.0448 (3) | 0.5442 (3) | 0.6721 (3) | 0.0171 (9) | |
H5A | 0.0141 | 0.4877 | 0.6767 | 0.020* | |
C6 | 0.0143 (3) | 0.7484 (3) | 0.5008 (3) | 0.0236 (10) | |
H6A | 0.0044 | 0.7044 | 0.4501 | 0.028* | |
H6B | −0.0415 | 0.7718 | 0.4928 | 0.028* | |
C7 | 0.0926 (2) | 0.8603 (3) | 0.4385 (3) | 0.0167 (9) | |
H7A | 0.0837 | 0.8165 | 0.3911 | 0.020* | |
C8 | 0.1326 (2) | 0.9898 (3) | 0.5286 (3) | 0.0152 (9) | |
C13 | 0.0877 (2) | 0.9230 (3) | 0.5583 (3) | 0.0135 (9) | |
C12 | 0.0736 (3) | 0.9453 (3) | 0.6317 (3) | 0.0175 (10) | |
H12A | 0.0428 | 0.9009 | 0.6499 | 0.021* | |
C11 | 0.1082 (3) | 1.0372 (3) | 0.6757 (3) | 0.0220 (10) | |
H11A | 0.0999 | 1.0559 | 0.7246 | 0.026* | |
C10 | 0.1551 (3) | 1.1025 (3) | 0.6488 (3) | 0.0220 (10) | |
H10A | 0.1790 | 1.1624 | 0.6816 | 0.026* | |
C9 | 0.1674 (3) | 1.0815 (3) | 0.5751 (3) | 0.0186 (10) | |
H9A | 0.1978 | 1.1269 | 0.5571 | 0.022* | |
C14 | 0.3534 (2) | 0.6536 (3) | 0.7270 (3) | 0.0176 (9) | |
H14A | 0.3621 | 0.5867 | 0.7500 | 0.021* | |
C15 | 0.3706 (2) | 0.7354 (3) | 0.7848 (3) | 0.0191 (10) | |
H15A | 0.3915 | 0.7236 | 0.8459 | 0.023* | |
C16 | 0.3568 (2) | 0.8352 (3) | 0.7520 (3) | 0.0152 (9) | |
C17 | 0.3283 (2) | 0.8485 (3) | 0.6601 (3) | 0.0161 (9) | |
H17A | 0.3200 | 0.9147 | 0.6356 | 0.019* | |
C18 | 0.3127 (2) | 0.7629 (3) | 0.6064 (3) | 0.0175 (10) | |
H18A | 0.2931 | 0.7726 | 0.5452 | 0.021* | |
C19 | 0.3725 (2) | 0.9284 (3) | 0.8137 (3) | 0.0174 (9) | |
H19A | 0.3589 | 0.9917 | 0.7788 | 0.021* | |
H19B | 0.3351 | 0.9241 | 0.8419 | 0.021* | |
C20 | 0.5281 (3) | 0.9789 (3) | 0.8737 (3) | 0.0162 (9) | |
H20A | 0.5194 | 1.0200 | 0.8248 | 0.019* | |
C21 | 0.5015 (3) | 0.8769 (3) | 0.9641 (3) | 0.0165 (9) | |
C22 | 0.4677 (3) | 0.8140 (3) | 1.0078 (3) | 0.0217 (10) | |
H22A | 0.4086 | 0.8028 | 0.9843 | 0.026* | |
C23 | 0.5263 (3) | 0.7690 (3) | 1.0875 (3) | 0.0273 (11) | |
H23A | 0.5064 | 0.7264 | 1.1186 | 0.033* | |
C24 | 0.6145 (3) | 0.7866 (3) | 1.1220 (3) | 0.0257 (11) | |
H24A | 0.6522 | 0.7539 | 1.1751 | 0.031* | |
C25 | 0.6478 (3) | 0.8505 (3) | 1.0806 (3) | 0.0224 (10) | |
H25A | 0.7068 | 0.8631 | 1.1054 | 0.027* | |
C26 | 0.5893 (3) | 0.8961 (3) | 0.9996 (3) | 0.0166 (9) | |
C27 | 0.4068 (3) | 0.1849 (4) | 0.6542 (3) | 0.0435 (14) | |
H27A | 0.4159 | 0.2210 | 0.7078 | 0.065* | |
H27B | 0.3462 | 0.1835 | 0.6132 | 0.065* | |
H27C | 0.4370 | 0.2200 | 0.6268 | 0.065* | |
O1 | 0.4380 (2) | 0.0826 (2) | 0.6760 (2) | 0.0395 (9) | |
H1 | 0.4366 | 0.0545 | 0.6316 | 0.059* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cd1 | 0.01903 (18) | 0.01604 (18) | 0.01442 (17) | −0.00084 (13) | 0.00788 (14) | 0.00038 (13) |
Cd2 | 0.01569 (17) | 0.01688 (18) | 0.01279 (17) | 0.00087 (13) | 0.00356 (14) | −0.00074 (13) |
I1 | 0.01795 (16) | 0.03018 (19) | 0.01836 (16) | −0.00153 (13) | 0.00393 (13) | 0.00307 (13) |
I2 | 0.02970 (18) | 0.01589 (16) | 0.03350 (18) | −0.00305 (13) | 0.01931 (15) | −0.00410 (13) |
I3 | 0.0239 (2) | 0.0196 (2) | 0.0212 (2) | −0.0028 (1) | 0.0092 (1) | 0.0016 (1) |
I4 | 0.02138 (17) | 0.02211 (17) | 0.01193 (15) | 0.00291 (12) | 0.00126 (13) | 0.00017 (12) |
N1 | 0.016 (2) | 0.0158 (19) | 0.020 (2) | −0.0012 (15) | 0.0105 (17) | 0.0010 (16) |
N2 | 0.0174 (19) | 0.0115 (19) | 0.0131 (18) | −0.0013 (15) | 0.0024 (16) | 0.0025 (15) |
N3 | 0.018 (2) | 0.017 (2) | 0.0158 (19) | 0.0003 (16) | 0.0082 (16) | 0.0001 (16) |
N4 | 0.0109 (18) | 0.017 (2) | 0.0118 (18) | −0.0015 (14) | 0.0023 (15) | −0.0026 (15) |
N5 | 0.0129 (19) | 0.019 (2) | 0.0110 (18) | −0.0038 (15) | 0.0017 (16) | −0.0074 (15) |
N6 | 0.0146 (19) | 0.021 (2) | 0.0166 (19) | −0.0021 (16) | 0.0060 (17) | −0.0012 (16) |
C1 | 0.015 (2) | 0.012 (2) | 0.019 (2) | −0.0009 (18) | 0.0061 (19) | −0.0015 (18) |
C2 | 0.015 (2) | 0.011 (2) | 0.023 (2) | −0.0002 (18) | 0.010 (2) | 0.0030 (18) |
C3 | 0.019 (2) | 0.012 (2) | 0.016 (2) | 0.0034 (18) | 0.0081 (19) | 0.0012 (18) |
C4 | 0.014 (2) | 0.022 (3) | 0.015 (2) | −0.0021 (18) | 0.0015 (19) | 0.0004 (19) |
C5 | 0.016 (2) | 0.016 (2) | 0.018 (2) | −0.0031 (18) | 0.006 (2) | −0.0014 (19) |
C6 | 0.020 (2) | 0.019 (2) | 0.022 (2) | −0.009 (2) | 0.002 (2) | 0.002 (2) |
C7 | 0.020 (2) | 0.017 (2) | 0.010 (2) | 0.0059 (19) | 0.0049 (19) | 0.0017 (18) |
C8 | 0.009 (2) | 0.017 (2) | 0.016 (2) | 0.0036 (17) | 0.0027 (19) | 0.0048 (18) |
C13 | 0.013 (2) | 0.009 (2) | 0.014 (2) | 0.0031 (17) | 0.0028 (18) | 0.0014 (18) |
C12 | 0.020 (2) | 0.018 (2) | 0.017 (2) | −0.0009 (19) | 0.010 (2) | 0.0047 (19) |
C11 | 0.033 (3) | 0.022 (3) | 0.013 (2) | 0.008 (2) | 0.012 (2) | 0.006 (2) |
C10 | 0.029 (3) | 0.015 (2) | 0.016 (2) | 0.002 (2) | 0.006 (2) | 0.0008 (19) |
C9 | 0.023 (2) | 0.014 (2) | 0.021 (2) | 0.0011 (19) | 0.011 (2) | 0.0048 (19) |
C14 | 0.014 (2) | 0.018 (2) | 0.017 (2) | 0.0009 (18) | 0.0036 (19) | 0.0007 (19) |
C15 | 0.015 (2) | 0.026 (3) | 0.011 (2) | −0.0033 (19) | 0.0015 (19) | −0.0015 (19) |
C16 | 0.007 (2) | 0.017 (2) | 0.019 (2) | −0.0032 (18) | 0.0026 (18) | −0.0049 (19) |
C17 | 0.014 (2) | 0.012 (2) | 0.020 (2) | 0.0001 (17) | 0.0055 (19) | 0.0048 (18) |
C18 | 0.017 (2) | 0.022 (3) | 0.011 (2) | −0.0009 (19) | 0.0038 (19) | 0.0006 (19) |
C19 | 0.011 (2) | 0.021 (2) | 0.016 (2) | −0.0028 (18) | 0.0024 (19) | −0.0068 (19) |
C20 | 0.020 (2) | 0.017 (2) | 0.009 (2) | 0.0006 (19) | 0.005 (2) | −0.0014 (18) |
C21 | 0.023 (2) | 0.015 (2) | 0.011 (2) | 0.0011 (19) | 0.007 (2) | −0.0030 (18) |
C22 | 0.023 (3) | 0.025 (3) | 0.017 (2) | −0.007 (2) | 0.009 (2) | −0.006 (2) |
C23 | 0.040 (3) | 0.025 (3) | 0.021 (3) | −0.003 (2) | 0.017 (2) | 0.000 (2) |
C24 | 0.034 (3) | 0.022 (3) | 0.014 (2) | 0.001 (2) | 0.005 (2) | 0.004 (2) |
C25 | 0.019 (2) | 0.021 (2) | 0.020 (2) | 0.001 (2) | 0.003 (2) | −0.003 (2) |
C26 | 0.017 (2) | 0.016 (2) | 0.015 (2) | 0.0023 (18) | 0.006 (2) | −0.0025 (18) |
C27 | 0.041 (3) | 0.042 (3) | 0.041 (3) | 0.006 (3) | 0.014 (3) | 0.005 (3) |
O1 | 0.054 (2) | 0.029 (2) | 0.0241 (19) | −0.0026 (18) | 0.0081 (19) | 0.0014 (16) |
Cd1—N3i | 2.271 (3) | C8—C13 | 1.405 (5) |
Cd1—N1 | 2.278 (3) | C13—C12 | 1.395 (5) |
Cd1—I2 | 2.7051 (6) | C12—C11 | 1.382 (5) |
Cd1—I1 | 2.7264 (10) | C12—H12A | 0.9300 |
Cd2—N6ii | 2.236 (3) | C11—C10 | 1.388 (5) |
Cd2—N4 | 2.315 (3) | C11—H11A | 0.9300 |
Cd2—I3 | 2.702 (6) | C10—C9 | 1.380 (5) |
Cd2—I4 | 2.706 (1) | C10—H10A | 0.9300 |
N1—C1 | 1.334 (5) | C9—H9A | 0.9300 |
N1—C5 | 1.346 (5) | C14—C15 | 1.372 (5) |
N2—C7 | 1.359 (5) | C14—H14A | 0.9300 |
N2—C13 | 1.407 (5) | C15—C16 | 1.379 (5) |
N2—C6 | 1.453 (5) | C15—H15A | 0.9300 |
N3—C7 | 1.308 (5) | C16—C17 | 1.398 (5) |
N3—C8 | 1.394 (5) | C16—C19 | 1.529 (5) |
N3—Cd1iii | 2.271 (3) | C17—C18 | 1.373 (5) |
N4—C18 | 1.333 (5) | C17—H17A | 0.9300 |
N4—C14 | 1.347 (5) | C18—H18A | 0.9300 |
N5—C20 | 1.366 (5) | C19—H19A | 0.9700 |
N5—C21 | 1.397 (5) | C19—H19B | 0.9700 |
N5—C19 | 1.465 (5) | C20—H20A | 0.9300 |
N6—C20 | 1.297 (5) | C21—C26 | 1.386 (5) |
N6—C26 | 1.401 (5) | C21—C22 | 1.396 (5) |
N6—Cd2iv | 2.236 (3) | C22—C23 | 1.383 (6) |
C1—C2 | 1.369 (5) | C22—H22A | 0.9300 |
C1—H1A | 0.9300 | C23—C24 | 1.391 (6) |
C2—C3 | 1.382 (5) | C23—H23A | 0.9300 |
C2—H2A | 0.9300 | C24—C25 | 1.370 (5) |
C3—C4 | 1.402 (5) | C24—H24A | 0.9300 |
C3—C6 | 1.509 (5) | C25—C26 | 1.400 (5) |
C4—C5 | 1.367 (5) | C25—H25A | 0.9300 |
C4—H4A | 0.9300 | C27—O1 | 1.412 (5) |
C5—H5A | 0.9300 | C27—H27A | 0.9600 |
C6—H6A | 0.9700 | C27—H27B | 0.9600 |
C6—H6B | 0.9700 | C27—H27C | 0.9600 |
C7—H7A | 0.9300 | O1—H1 | 0.8200 |
C8—C9 | 1.394 (5) | ||
N3i—Cd1—N1 | 97.99 (11) | C11—C12—H12A | 122.0 |
N3i—Cd1—I2 | 108.01 (8) | C13—C12—H12A | 122.0 |
N1—Cd1—I2 | 106.72 (8) | C12—C11—C10 | 121.7 (4) |
N3i—Cd1—I1 | 104.48 (8) | C12—C11—H11A | 119.2 |
N1—Cd1—I1 | 106.76 (8) | C10—C11—H11A | 119.2 |
I2—Cd1—I1 | 128.711 (15) | C9—C10—C11 | 122.3 (4) |
N6ii—Cd2—N4 | 98.86 (12) | C9—C10—H10A | 118.9 |
N6ii—Cd2—I3 | 107.34 (9) | C11—C10—H10A | 118.9 |
N4—Cd2—I3 | 105.01 (8) | C10—C9—C8 | 117.5 (4) |
N6ii—Cd2—I4 | 110.99 (9) | C10—C9—H9A | 121.3 |
N4—Cd2—I4 | 100.80 (8) | C8—C9—H9A | 121.3 |
I3—Cd2—I4 | 129.14 (8) | N4—C14—C15 | 122.5 (4) |
C1—N1—C5 | 117.1 (3) | N4—C14—H14A | 118.7 |
C1—N1—Cd1 | 118.8 (3) | C15—C14—H14A | 118.7 |
C5—N1—Cd1 | 123.7 (3) | C14—C15—C16 | 119.7 (4) |
C7—N2—C13 | 106.0 (3) | C14—C15—H15A | 120.1 |
C7—N2—C6 | 127.6 (3) | C16—C15—H15A | 120.1 |
C13—N2—C6 | 126.3 (3) | C15—C16—C17 | 117.7 (4) |
C7—N3—C8 | 105.0 (3) | C15—C16—C19 | 121.4 (4) |
C7—N3—Cd1iii | 130.1 (3) | C17—C16—C19 | 120.9 (3) |
C8—N3—Cd1iii | 124.6 (3) | C18—C17—C16 | 119.3 (4) |
C18—N4—C14 | 118.0 (3) | C18—C17—H17A | 120.4 |
C18—N4—Cd2 | 123.1 (3) | C16—C17—H17A | 120.4 |
C14—N4—Cd2 | 117.7 (3) | N4—C18—C17 | 122.8 (4) |
C20—N5—C21 | 106.6 (3) | N4—C18—H18A | 118.6 |
C20—N5—C19 | 124.6 (3) | C17—C18—H18A | 118.6 |
C21—N5—C19 | 128.3 (3) | N5—C19—C16 | 110.2 (3) |
C20—N6—C26 | 106.4 (3) | N5—C19—H19A | 109.6 |
C20—N6—Cd2iv | 124.7 (3) | C16—C19—H19A | 109.6 |
C26—N6—Cd2iv | 128.9 (3) | N5—C19—H19B | 109.6 |
N1—C1—C2 | 123.6 (4) | C16—C19—H19B | 109.6 |
N1—C1—H1A | 118.2 | H19A—C19—H19B | 108.1 |
C2—C1—H1A | 118.2 | N6—C20—N5 | 112.5 (4) |
C1—C2—C3 | 119.5 (4) | N6—C20—H20A | 123.7 |
C1—C2—H2A | 120.3 | N5—C20—H20A | 123.7 |
C3—C2—H2A | 120.3 | C26—C21—C22 | 122.0 (4) |
C2—C3—C4 | 117.3 (4) | C26—C21—N5 | 105.6 (3) |
C2—C3—C6 | 124.3 (4) | C22—C21—N5 | 132.4 (4) |
C4—C3—C6 | 118.4 (4) | C23—C22—C21 | 116.8 (4) |
C5—C4—C3 | 119.3 (4) | C23—C22—H22A | 121.6 |
C5—C4—H4A | 120.4 | C21—C22—H22A | 121.6 |
C3—C4—H4A | 120.4 | C22—C23—C24 | 121.0 (4) |
N1—C5—C4 | 123.1 (4) | C22—C23—H23A | 119.5 |
N1—C5—H5A | 118.4 | C24—C23—H23A | 119.5 |
C4—C5—H5A | 118.4 | C25—C24—C23 | 122.3 (4) |
N2—C6—C3 | 115.0 (3) | C25—C24—H24A | 118.8 |
N2—C6—H6A | 108.5 | C23—C24—H24A | 118.8 |
C3—C6—H6A | 108.5 | C24—C25—C26 | 117.2 (4) |
N2—C6—H6B | 108.5 | C24—C25—H25A | 121.4 |
C3—C6—H6B | 108.5 | C26—C25—H25A | 121.4 |
H6A—C6—H6B | 107.5 | C21—C26—C25 | 120.5 (4) |
N3—C7—N2 | 114.2 (3) | C21—C26—N6 | 108.9 (3) |
N3—C7—H7A | 122.9 | C25—C26—N6 | 130.6 (4) |
N2—C7—H7A | 122.9 | O1—C27—H27A | 109.5 |
N3—C8—C9 | 130.7 (4) | O1—C27—H27B | 109.5 |
N3—C8—C13 | 109.8 (4) | H27A—C27—H27B | 109.5 |
C9—C8—C13 | 119.5 (4) | O1—C27—H27C | 109.5 |
C12—C13—C8 | 123.0 (4) | H27A—C27—H27C | 109.5 |
C12—C13—N2 | 132.1 (4) | H27B—C27—H27C | 109.5 |
C8—C13—N2 | 105.0 (3) | C27—O1—H1 | 109.5 |
C11—C12—C13 | 116.0 (4) | ||
N3i—Cd1—N1—C1 | 92.6 (3) | N2—C13—C12—C11 | 179.2 (4) |
I2—Cd1—N1—C1 | −155.8 (3) | C13—C12—C11—C10 | −0.8 (6) |
I1—Cd1—N1—C1 | −15.2 (3) | C12—C11—C10—C9 | 2.3 (6) |
N3i—Cd1—N1—C5 | −94.8 (3) | C11—C10—C9—C8 | −1.6 (6) |
I2—Cd1—N1—C5 | 16.8 (3) | N3—C8—C9—C10 | 179.5 (4) |
I1—Cd1—N1—C5 | 157.4 (3) | C13—C8—C9—C10 | −0.4 (6) |
N6ii—Cd2—N4—C18 | 107.4 (3) | C18—N4—C14—C15 | 0.2 (6) |
I3—Cd2—N4—C18 | −141.9 (3) | Cd2—N4—C14—C15 | −167.5 (3) |
I4—Cd2—N4—C18 | −6.1 (3) | N4—C14—C15—C16 | 1.1 (6) |
N6ii—Cd2—N4—C14 | −85.6 (3) | C14—C15—C16—C17 | −2.3 (6) |
I3—Cd2—N4—C14 | 25.1 (3) | C14—C15—C16—C19 | 178.2 (4) |
I4—Cd2—N4—C14 | 160.9 (3) | C15—C16—C17—C18 | 2.1 (6) |
C5—N1—C1—C2 | −1.2 (6) | C19—C16—C17—C18 | −178.4 (3) |
Cd1—N1—C1—C2 | 171.9 (3) | C14—N4—C18—C17 | −0.4 (6) |
N1—C1—C2—C3 | 3.5 (6) | Cd2—N4—C18—C17 | 166.6 (3) |
C1—C2—C3—C4 | −3.7 (6) | C16—C17—C18—N4 | −0.8 (6) |
C1—C2—C3—C6 | 173.8 (4) | C20—N5—C19—C16 | 88.7 (5) |
C2—C3—C4—C5 | 1.9 (6) | C21—N5—C19—C16 | −83.1 (4) |
C6—C3—C4—C5 | −175.7 (4) | C15—C16—C19—N5 | 59.9 (5) |
C1—N1—C5—C4 | −0.8 (6) | C17—C16—C19—N5 | −119.7 (4) |
Cd1—N1—C5—C4 | −173.4 (3) | C26—N6—C20—N5 | 0.2 (4) |
C3—C4—C5—N1 | 0.3 (6) | Cd2iv—N6—C20—N5 | 179.3 (2) |
C7—N2—C6—C3 | 121.7 (4) | C21—N5—C20—N6 | −0.1 (5) |
C13—N2—C6—C3 | −61.8 (5) | C19—N5—C20—N6 | −173.4 (3) |
C2—C3—C6—N2 | −0.4 (6) | C20—N5—C21—C26 | 0.0 (4) |
C4—C3—C6—N2 | 177.1 (3) | C19—N5—C21—C26 | 172.9 (3) |
C8—N3—C7—N2 | −0.3 (4) | C20—N5—C21—C22 | −179.4 (4) |
Cd1iii—N3—C7—N2 | −174.1 (2) | C19—N5—C21—C22 | −6.5 (7) |
C13—N2—C7—N3 | 1.3 (4) | C26—C21—C22—C23 | −1.6 (6) |
C6—N2—C7—N3 | 178.3 (3) | N5—C21—C22—C23 | 177.7 (4) |
C7—N3—C8—C9 | 179.2 (4) | C21—C22—C23—C24 | 0.2 (6) |
Cd1iii—N3—C8—C9 | −6.6 (6) | C22—C23—C24—C25 | 1.5 (7) |
C7—N3—C8—C13 | −0.9 (4) | C23—C24—C25—C26 | −1.8 (6) |
Cd1iii—N3—C8—C13 | 173.3 (2) | C22—C21—C26—C25 | 1.3 (6) |
N3—C8—C13—C12 | −178.0 (3) | N5—C21—C26—C25 | −178.1 (3) |
C9—C8—C13—C12 | 1.9 (6) | C22—C21—C26—N6 | 179.6 (4) |
N3—C8—C13—N2 | 1.6 (4) | N5—C21—C26—N6 | 0.2 (4) |
C9—C8—C13—N2 | −178.4 (3) | C24—C25—C26—C21 | 0.4 (6) |
C7—N2—C13—C12 | 177.9 (4) | C24—C25—C26—N6 | −177.5 (4) |
C6—N2—C13—C12 | 0.8 (6) | C20—N6—C26—C21 | −0.2 (4) |
C7—N2—C13—C8 | −1.7 (4) | Cd2iv—N6—C26—C21 | −179.2 (3) |
C6—N2—C13—C8 | −178.8 (3) | C20—N6—C26—C25 | 177.8 (4) |
C8—C13—C12—C11 | −1.2 (6) | Cd2iv—N6—C26—C25 | −1.2 (6) |
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) −x+1, y−1/2, −z+3/2; (iii) x, −y+3/2, z−1/2; (iv) −x+1, y+1/2, −z+3/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···I2v | 0.82 | 2.88 | 3.647 (5) | 155 |
Symmetry code: (v) x, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [CdI2(C13H11N3)]·0.5CH4O |
Mr | 591.47 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 17.469 (4), 12.913 (3), 16.814 (3) |
β (°) | 117.56 (3) |
V (Å3) | 3362.6 (16) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 4.97 |
Crystal size (mm) | 0.10 × 0.06 × 0.04 |
Data collection | |
Diffractometer | Rigaku R-AXIS RAPID-S |
Absorption correction | Multi-scan (SADABS; Bruker, 1998) |
Tmin, Tmax | 0.637, 0.826 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 33513, 5901, 5155 |
Rint | 0.066 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.024, 0.054, 1.02 |
No. of reflections | 5901 |
No. of parameters | 363 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.49, −0.81 |
Computer programs: CrystalClear (Rigaku/MSC, 2005), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Bruker, 1998).
Cd1—N3i | 2.271 (3) | Cd2—N6ii | 2.236 (3) |
Cd1—N1 | 2.278 (3) | Cd2—N4 | 2.315 (3) |
Cd1—I2 | 2.7051 (6) | Cd2—I3 | 2.702 (6) |
Cd1—I1 | 2.7264 (10) | Cd2—I4 | 2.706 (1) |
N3i—Cd1—N1 | 97.99 (11) | N6ii—Cd2—N4 | 98.86 (12) |
N3i—Cd1—I2 | 108.01 (8) | N6ii—Cd2—I3 | 107.34 (9) |
N1—Cd1—I2 | 106.72 (8) | N4—Cd2—I3 | 105.01 (8) |
N3i—Cd1—I1 | 104.48 (8) | N6ii—Cd2—I4 | 110.99 (9) |
N1—Cd1—I1 | 106.76 (8) | N4—Cd2—I4 | 100.80 (8) |
I2—Cd1—I1 | 128.711 (15) | I3—Cd2—I4 | 129.14 (8) |
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) −x+1, y−1/2, −z+3/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···I2iii | 0.82 | 2.88 | 3.647 (5) | 155 |
Symmetry code: (iii) x, −y+1/2, z−1/2. |
Acknowledgements
The authors thank Nankai University for supporting this work.
References
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N-containing heterocyclic aromatic compounds are extensively used as bridging ligands in coordination and metallosupramolecular chemistry (Steel, 2005). In recent years, benzimidazole groups have been used to link different alkyl or aromatic groups to form a series of bi- and multi-dentate flexible ligands, which can adopt different conformations according to the different geometric requirements of the metal centers when forming complexes (Li et al., 2007). Many complexes with these ligands show unique structural topologies and interesting properties (Meng et al., 2004). Recently, Liu and co-workers synthesized a flexible bridging ligand 1-(pyridin-4-ylmethyl)-1H-benzo[d]imidazole (L) as well as its chiral one-dimensional double helix polymer, [Ag(L)(NO3)]n (Huang et al., 2006). We herein report the crystal structure of a cadmium complex of this ligand (I).
In the molecule of (I), (Fig. 1 and 2), the bond lengths and angles (Table 1) are generally within normal ranges (Allen et al., 1987). The CdII center is tetrahedrally coordinated by two N atoms from two L ligands (L = 1-(pyridin-4-ylmethyl)-1H-benzo[d]imidazole) and two iodide ions. In the extended structure of (I), the CdII centers are interconnected by L ligands to form two one-dimensional chains along two different directions (Fig. 3). The chain containing Cd1 is along the c direction and the other one containing Cd2 is along the b direction, making them essentially orthogonal. The methanol solvate molecules are associated with the Cd1 chains via O—H···I interactions.