metal-organic compounds
Poly[aqua[μ2-1,4-bis(imidazol-1-ylmethyl)benzene-κ2N3:N3′](μ2-5-hydroxybenzene-1,3-dicarboxylato-κ4O1,O1′:O3,O3′)cadmium(II)], a twofold interpenetrated CdSO4-like metal–organic polymer
aCollege of Chemistry, Jilin Normal University, Siping 136000, People's Republic of China, and bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: chemjlsp@yahoo.com.cn
In the title cadmium(II) complex, [Cd(C8H4O5)(C14H14N4)(H2O)]n, the 5-hydroxybenzene-1,3-dicarboxylate (5-OH-1,3-bdc) and 1,4-bis(imidazol-1-ylmethyl)benzene (1,4,-bix) ligands bridge water-coordinated CdII atoms to generate a three-dimensional network. Two carboxylate groups from different ligands function as O,O′-chelates, while two imidazole N atoms from different ligands coordinate in a monodentate fashion, and one water molecule completes the seven-coordinate pentagonal bipyramid around the CdII atom, in which the N atoms occupy the axial sites and the O atoms occupy the equatorial sites. The overall architecture is a twofold interpenetrated CdSO4-type framework. The two crystallographically equivalent frameworks are linked by O—H⋯O hydrogen bonds between the water, hydroxy and carboxylate groups.
Comment
The design and synthesis of metal–organic frameworks (MOFs) has been an area of rapid growth in recent years owing to the potential applications of MOFs in nonlinear optics, luminescence, magnetism, catalysis, gas absorption, ion exchange and as zeolite-like materials for molecular selection (O'Keeffe et al., 2008). Structural diversity in MOFs can occur as a result of various processes, including supramolecular interpenetration or interweaving (Batten & Robson, 1998; Batten, 2001). Ideally, the topologies of MOFs can be controlled and modified by the coordination geometry preferred by the metal ion and the chemical structure of the organic ligand chosen (Abrahams et al., 1999; Yang et al., 2008). In this regard, rigid N-donor 4,4′-bipyridine (bipy) and its derivatives have been studied in the construction of MOFs (Qiao et al., 2008). So far, a number of MOFs based on bipy and its derivatives have been reported, including one-dimensional chains, two-dimensional layers and three-dimensional frameworks (Carlucci et al., 2003). However, reports of MOFs constructed by flexible N-donor ligands are relatively rare (Wang et al., 2006). Among such ligands, bis(imidazole) derivatives are a good choice (Yang et al., 2008), leading to some intriguing interpenetrating architectures and topologies (Wang et al., 2006). In this work, we chose 5-hydroxybenzene-1,3-dicarboxylic acid (5-OH-1,3-H2bdc) as a dicarboxylate ligand and 1,4-bis(imidazol-1-ylmethyl)benzene (1,4-bix) as a flexible N-donor ligand, yielding a new coordination polymer, [Cd(5-OH-1,3-bdc)(1,4-bix)(H2O)], (I), with a fascinating twofold interpenetrated three-dimensional CdSO4-like framework. After the acceptance of this paper, we noticed that the structure of (I) has recently been described by Xia et al. (2011). However, the interpenetrated topology and hydrogen-bonding interactions were not well discussed in that report.
The contains one CdII atom, one 5-OH-1,3-bdc anion, one 1,4-bix ligand and one coordination water molecule (Fig. 1). Each CdII atom is seven-coordinated in a pentagonal bipyramid by four carboxylate O atoms from two different 5-OH-1,3-bdc anions, one water O atom and two N atoms from two distinct 1,4-bix ligands. The N atoms occupy the axial sites and the O atoms occupy the equatorial sites of the bipyramid. The Cd—Ocarboxylate distances (Table 1) are comparable to those observed in [Cd(1,4-bdc)(bpdo)(H2O)]n (1,4-bdc is benzene-1,4-dicarboxylate and bpdo is 4,4′-bipyridine N,N′-dioxide; Xu & Xie, 2010).
of (I)Each crystallographically unique CdII atom is bridged by the 1,4-bix ligands and 5-OH-1,3-bdc anions to generate a novel three-dimensional framework (Fig. 2). The Cd⋯Cd distances bridged by 1,4-bix and 5-OH-1,3-bdc are 14.3668 (12) and 9.8433 (8) Å, respectively. Topologically, the CdII centre is defined as a four-connected node, and 1,4-bix and the 5-OH-1,3-bdc serve as linkers. Therefore, on the basis of the concept of chemical topology, the overall structure of (I) is a four-connected framework with the Schläfli symbol of 658. Topological analysis reveals that this three-dimensional framework is a typical CdSO4 net. Interestingly, the large spaces in the single three-dimensional framework allow another identical framework to interpenetrate it, providing a twofold interpenetrating CdSO4 framework (Fig. 3). Each CdSO4 net is hydrogen bonded to its neighbour through O—H⋯O hydrogen bonds among the water molecules, hydroxy group and carboxylate O atoms (Table 2).
So far, some related interpenetrated CdSO4-like MOFs based on both dicarboxylate and flexible N-donor bridging ligands have been reported. The structure of [Zn2(1,4-bdc)Cl2(bpp)]n [1,4-bdc is benzene-1,4-dicarboxylate and bpp is 1,3-bis(4-pyridyl)propane; Zhang et al., 2006] also contains two crystallographically equivalent nets, but differs from (I) in that the four-connected nodes are based on ZnII dimers rather than mononuclear complexes. [Zn(mip)(bpa)]n [mip is 5-methylisophthalate and bpa is 1,2-bis(4-pyridyl)ethane; Ma et al., 2009] shows an unusual threefold interpenetrated CdSO4 topology. [Ni(oba)(bbi)]2·H2O [oba is 4,4′-oxybis(benzoate) and bbi is 1,1′-(1,4-butanediyl)bis(imidazole); Yang et al., 2009] also shows twofold interpenetrated nets as in (I); however, the nets are crystallographically distinct.
Experimental
A mixture of CdCl2·2.5H2O (0.5 mmol), 1,4-bis(imidazol-1-ylmethyl)benzene (0.5 mmol), 5-hydroxybenzene-1,3-dicarboxylic acid (0.5 mmol) and water (12 ml) was sealed in a 23 ml Teflon-lined stainless steel Parr bomb. The bomb was heated at 413 K for 3 d and then cooled to room temperature. Colourless block-shaped crystals were collected and washed with water; the yield based on Cd was about 40%.
Crystal data
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Carbon-bound H atoms were positioned geometrically [C—H = 0.93 (aromatic) or 0.97 Å (methylene)] and included as riding atoms, with Uiso(H) values fixed at 1.2Ueq(C). H atoms of water molecules were located in difference Fourier maps and refined isotropically with distance restraints of O—H = 0.85 (1) Å and H⋯H = 1.35 (1) Å, and with Uiso(H) = 1.5Ueq(O). The hydroxy H atom was located in a difference Fourier map and refined isotropically with a distance restraint of O—H = 0.82 (1) Å and with Uiso(H) = 1.5Ueq(O).
Data collection: SMART (Bruker, 1997); cell SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL-Plus (Sheldrick, 2008); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
10.1107/S010827011102083X/sq3290sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S010827011102083X/sq3290Isup2.hkl
A mixture of CdCl2.2.5H2O (0.5 mmol), 1,4-bis(imidazol-1-ylmethyl)benzene (0.5 mmol), 5-hydroxybenzene-1,3-dicarboxylic acid (0.5 mmol) and water (12 ml) was sealed in a 23 ml Teflon-lined stainless-steel Parr bomb. The bomb was heated at 413 K for 3 d. It was then cooled to room temperature. Colourless block-shaped crystals were collected and washed with water; the yield based on Cd was about 40%.
Carbon-bound H atoms were positioned geometrically [C—H = 0.93 (aromatic) or 0.97 (methylene) Å] and included as riding atoms with Uiso(H) fixed at 1.2Ueq(C). H atoms bonded to water molecules were located in difference Fourier maps and refined isotropically with distance restraints of O—H = 0.85 (1) and H···H = 1.35 (1) with Uiso = 1.5Ueq(O). The hydroxy H atom was located in a difference Fourier map and refined isotropically with a distance restraint of O—H = 0.82 (1) Å and Uiso = 1.5Ueq(O).
Data collection: SMART (Bruker, 1997); cell
SAINT (Bruker, 1999); data reduction: SAINT (Bruker, 1999); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL-Plus (Sheldrick, 2008); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. A view of the local coordination of the CdII atom in (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. [Symmetry codes: (i) x, y - 1, z - 1; (ii) x + 1/2, -y + 1, z - 1/2.] | |
Fig. 2. View of a single CdSO4 net of (I), showing bridging by 1,4-bix and 5-OH-1,3-bdc ligands. | |
Fig. 3. View of the twofold interpenetrating three-dimensional CdSO4 net of (I). |
[Cd(C8H4O5)(C14H14N4)(H2O)] | F(000) = 552 |
Mr = 548.82 | Dx = 1.749 Mg m−3 |
Monoclinic, Pn | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P -2yac | Cell parameters from 2693 reflections |
a = 11.5800 (9) Å | θ = 2.1–28.3° |
b = 8.4221 (6) Å | µ = 1.10 mm−1 |
c = 11.6393 (9) Å | T = 293 K |
β = 113.354 (1)° | Block, colorless |
V = 1042.16 (14) Å3 | 0.18 × 0.16 × 0.11 mm |
Z = 2 |
Bruker APEX diffractometer | 3693 independent reflections |
Radiation source: fine-focus sealed tube | 3404 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
ϕ and ω scans | θmax = 28.3°, θmin = 2.1° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −10→15 |
Tmin = 0.39, Tmax = 0.57 | k = −11→8 |
6155 measured reflections | l = −15→14 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.028 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.054 | w = 1/[σ2(Fo2) + (0.0136P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.02 | (Δ/σ)max = 0.001 |
3693 reflections | Δρmax = 0.38 e Å−3 |
307 parameters | Δρmin = −0.39 e Å−3 |
6 restraints | Absolute structure: Flack (1983), ???? Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.013 (19) |
[Cd(C8H4O5)(C14H14N4)(H2O)] | V = 1042.16 (14) Å3 |
Mr = 548.82 | Z = 2 |
Monoclinic, Pn | Mo Kα radiation |
a = 11.5800 (9) Å | µ = 1.10 mm−1 |
b = 8.4221 (6) Å | T = 293 K |
c = 11.6393 (9) Å | 0.18 × 0.16 × 0.11 mm |
β = 113.354 (1)° |
Bruker APEX diffractometer | 3693 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 3404 reflections with I > 2σ(I) |
Tmin = 0.39, Tmax = 0.57 | Rint = 0.031 |
6155 measured reflections |
R[F2 > 2σ(F2)] = 0.028 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.054 | Δρmax = 0.38 e Å−3 |
S = 1.02 | Δρmin = −0.39 e Å−3 |
3693 reflections | Absolute structure: Flack (1983), ???? Friedel pairs |
307 parameters | Absolute structure parameter: −0.013 (19) |
6 restraints |
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 | 0.74827 (2) | 0.59903 (3) | 0.92168 (2) | 0.02739 (7) | |
C1 | 0.8351 (4) | 0.2245 (5) | 1.0146 (4) | 0.0371 (9) | |
H1 | 0.9061 | 0.2274 | 0.9960 | 0.044* | |
C2 | 0.8004 (5) | 0.0995 (5) | 1.0672 (5) | 0.0371 (11) | |
H2 | 0.8416 | 0.0026 | 1.0906 | 0.045* | |
C3 | 0.6645 (4) | 0.2929 (4) | 1.0332 (4) | 0.0340 (9) | |
H3 | 0.5949 | 0.3505 | 1.0302 | 0.041* | |
C4 | 0.6212 (4) | 0.0550 (4) | 1.1358 (4) | 0.0359 (9) | |
H4A | 0.6308 | −0.0572 | 1.1230 | 0.043* | |
H4B | 0.5327 | 0.0809 | 1.0932 | 0.043* | |
C5 | 0.6608 (4) | 0.0849 (4) | 1.2738 (4) | 0.0346 (9) | |
C6 | 0.7597 (5) | 0.1817 (6) | 1.3458 (5) | 0.0395 (12) | |
H6 | 0.8080 | 0.2308 | 1.3085 | 0.047* | |
C7 | 0.5911 (4) | 0.0142 (5) | 1.3327 (4) | 0.0417 (10) | |
H7 | 0.5248 | −0.0524 | 1.2868 | 0.050* | |
C8 | 0.6178 (5) | 0.0400 (5) | 1.4583 (4) | 0.0451 (11) | |
H8 | 0.5701 | −0.0102 | 1.4957 | 0.054* | |
C9 | 0.7152 (5) | 0.1403 (5) | 1.5283 (4) | 0.0348 (11) | |
C10 | 0.7887 (5) | 0.2071 (5) | 1.4711 (4) | 0.0425 (11) | |
H10 | 0.8577 | 0.2694 | 1.5177 | 0.051* | |
C11 | 0.7392 (5) | 0.1826 (5) | 1.6620 (4) | 0.0429 (11) | |
H11A | 0.8283 | 0.2030 | 1.7074 | 0.052* | |
H11B | 0.6943 | 0.2797 | 1.6624 | 0.052* | |
C12 | 0.5960 (4) | 0.0628 (5) | 1.7552 (4) | 0.0405 (10) | |
H12 | 0.5370 | 0.1439 | 1.7365 | 0.049* | |
C13 | 0.5961 (4) | −0.0752 (4) | 1.8158 (4) | 0.0373 (9) | |
H13 | 0.5365 | −0.1041 | 1.8469 | 0.045* | |
C14 | 0.7585 (4) | −0.0810 (4) | 1.7695 (4) | 0.0363 (9) | |
H14 | 0.8317 | −0.1135 | 1.7614 | 0.044* | |
C15 | 0.4697 (4) | 0.4802 (4) | 1.3868 (3) | 0.0273 (8) | |
C16 | 0.5843 (4) | 0.5526 (4) | 1.3806 (3) | 0.0264 (8) | |
C17 | 0.5929 (4) | 0.5792 (4) | 1.2659 (3) | 0.0269 (8) | |
H17 | 0.5256 | 0.5546 | 1.1916 | 0.032* | |
C18 | 0.7039 (4) | 0.6434 (4) | 1.2634 (4) | 0.0274 (8) | |
C19 | 0.7169 (4) | 0.6621 (4) | 1.1412 (4) | 0.0300 (9) | |
C20 | 0.8022 (4) | 0.6847 (5) | 1.3746 (4) | 0.0282 (8) | |
H20 | 0.8751 | 0.7290 | 1.3730 | 0.034* | |
C21 | 0.7921 (4) | 0.6600 (4) | 1.4888 (3) | 0.0293 (8) | |
C22 | 0.6843 (4) | 0.5937 (4) | 1.4904 (4) | 0.0279 (9) | |
H22 | 0.6783 | 0.5761 | 1.5667 | 0.033* | |
N1 | 0.7499 (3) | 0.3462 (4) | 0.9927 (3) | 0.0334 (8) | |
N2 | 0.6920 (3) | 0.1456 (3) | 1.0788 (3) | 0.0317 (8) | |
N3 | 0.7004 (4) | 0.0586 (4) | 1.7272 (3) | 0.0348 (9) | |
N4 | 0.6982 (3) | −0.1657 (4) | 1.8238 (3) | 0.0334 (8) | |
O1 | 0.8266 (3) | 0.6877 (3) | 1.1446 (2) | 0.0371 (7) | |
O2 | 0.6211 (3) | 0.6472 (4) | 1.0407 (3) | 0.0361 (7) | |
O3 | 0.4686 (3) | 0.4481 (3) | 1.4917 (2) | 0.0396 (7) | |
O4 | 0.3735 (3) | 0.4533 (4) | 1.2877 (3) | 0.0380 (7) | |
O5 | 0.8918 (3) | 0.7014 (4) | 1.5949 (3) | 0.0421 (7) | |
H5 | 0.896 (5) | 0.670 (6) | 1.662 (2) | 0.063* | |
O1W | 0.5537 (3) | 0.5093 (4) | 0.7498 (3) | 0.0542 (9) | |
HW11 | 0.486 (3) | 0.483 (7) | 0.756 (4) | 0.081* | |
HW12 | 0.537 (4) | 0.511 (7) | 0.6721 (14) | 0.081* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cd1 | 0.03035 (12) | 0.03188 (12) | 0.02375 (11) | 0.00339 (19) | 0.01479 (9) | 0.00450 (17) |
C1 | 0.030 (2) | 0.038 (2) | 0.041 (2) | 0.0026 (19) | 0.011 (2) | −0.0045 (18) |
C2 | 0.036 (3) | 0.034 (3) | 0.035 (3) | 0.011 (2) | 0.007 (2) | −0.0015 (19) |
C3 | 0.038 (2) | 0.026 (2) | 0.040 (2) | 0.0083 (18) | 0.017 (2) | 0.0066 (16) |
C4 | 0.045 (3) | 0.0257 (19) | 0.038 (2) | −0.0018 (18) | 0.018 (2) | 0.0030 (16) |
C5 | 0.039 (2) | 0.027 (2) | 0.039 (2) | 0.0086 (18) | 0.016 (2) | 0.0055 (17) |
C6 | 0.043 (3) | 0.043 (3) | 0.037 (3) | −0.006 (3) | 0.021 (2) | 0.008 (2) |
C7 | 0.044 (3) | 0.040 (2) | 0.042 (2) | −0.009 (2) | 0.018 (2) | −0.0049 (19) |
C8 | 0.054 (3) | 0.042 (2) | 0.047 (3) | −0.011 (2) | 0.029 (3) | 0.000 (2) |
C9 | 0.041 (3) | 0.030 (2) | 0.032 (2) | 0.0031 (19) | 0.013 (2) | 0.0083 (17) |
C10 | 0.047 (3) | 0.038 (2) | 0.046 (3) | −0.008 (2) | 0.022 (2) | 0.0024 (18) |
C11 | 0.063 (3) | 0.029 (2) | 0.037 (2) | −0.004 (2) | 0.020 (2) | 0.0042 (18) |
C12 | 0.034 (3) | 0.041 (2) | 0.041 (2) | 0.007 (2) | 0.010 (2) | 0.0008 (18) |
C13 | 0.030 (2) | 0.039 (2) | 0.044 (2) | 0.0001 (18) | 0.016 (2) | 0.0018 (18) |
C14 | 0.045 (3) | 0.033 (2) | 0.035 (2) | 0.0033 (19) | 0.021 (2) | −0.0006 (17) |
C15 | 0.027 (2) | 0.031 (2) | 0.029 (2) | 0.0020 (16) | 0.0158 (18) | −0.0016 (15) |
C16 | 0.027 (2) | 0.0323 (19) | 0.0235 (19) | 0.0039 (15) | 0.0146 (17) | 0.0002 (14) |
C17 | 0.0237 (19) | 0.035 (2) | 0.0221 (18) | 0.0014 (16) | 0.0089 (16) | 0.0007 (15) |
C18 | 0.035 (2) | 0.0288 (19) | 0.025 (2) | 0.0035 (16) | 0.0184 (18) | 0.0014 (14) |
C19 | 0.050 (3) | 0.0209 (18) | 0.029 (2) | 0.0050 (18) | 0.026 (2) | 0.0039 (15) |
C20 | 0.026 (2) | 0.032 (2) | 0.031 (2) | 0.0019 (18) | 0.0155 (18) | 0.0073 (17) |
C21 | 0.026 (2) | 0.033 (2) | 0.025 (2) | 0.0042 (17) | 0.0064 (18) | 0.0023 (15) |
C22 | 0.029 (2) | 0.034 (2) | 0.0222 (19) | 0.0005 (18) | 0.0125 (17) | 0.0026 (16) |
N1 | 0.037 (2) | 0.0320 (17) | 0.0317 (18) | 0.0050 (15) | 0.0140 (16) | 0.0031 (13) |
N2 | 0.040 (2) | 0.0265 (17) | 0.0313 (19) | 0.0057 (15) | 0.0169 (17) | 0.0032 (13) |
N3 | 0.048 (3) | 0.0309 (18) | 0.027 (2) | 0.0075 (18) | 0.017 (2) | 0.0054 (15) |
N4 | 0.039 (2) | 0.0335 (17) | 0.0289 (18) | 0.0012 (15) | 0.0146 (16) | 0.0032 (13) |
O1 | 0.0397 (17) | 0.0464 (17) | 0.0346 (16) | −0.0003 (14) | 0.0248 (15) | 0.0021 (12) |
O2 | 0.045 (2) | 0.0384 (16) | 0.0290 (17) | 0.0068 (16) | 0.0191 (16) | 0.0056 (13) |
O3 | 0.0350 (17) | 0.0622 (19) | 0.0284 (15) | −0.0083 (14) | 0.0199 (14) | 0.0006 (13) |
O4 | 0.0266 (17) | 0.0599 (19) | 0.0260 (16) | −0.0037 (17) | 0.0090 (14) | −0.0046 (15) |
O5 | 0.0351 (17) | 0.061 (2) | 0.0257 (15) | −0.0080 (15) | 0.0070 (14) | 0.0037 (14) |
O1W | 0.047 (2) | 0.075 (2) | 0.0317 (16) | −0.0192 (18) | 0.0054 (15) | 0.0046 (16) |
Cd1—N4i | 2.244 (3) | C11—H11B | 0.9700 |
Cd1—N1 | 2.282 (3) | C12—C13 | 1.359 (5) |
Cd1—O3ii | 2.384 (3) | C12—N3 | 1.370 (6) |
Cd1—O2 | 2.423 (3) | C12—H12 | 0.9300 |
Cd1—O1W | 2.465 (3) | C13—N4 | 1.378 (5) |
Cd1—O1 | 2.499 (3) | C13—H13 | 0.9300 |
Cd1—O4ii | 2.554 (3) | C14—N4 | 1.322 (5) |
C1—C2 | 1.357 (6) | C14—N3 | 1.347 (5) |
C1—N1 | 1.375 (5) | C14—H14 | 0.9300 |
C1—H1 | 0.9300 | C15—O3 | 1.256 (4) |
C2—N2 | 1.371 (6) | C15—O4 | 1.267 (5) |
C2—H2 | 0.9300 | C15—C16 | 1.488 (5) |
C3—N1 | 1.331 (5) | C16—C22 | 1.386 (5) |
C3—N2 | 1.337 (4) | C16—C17 | 1.396 (5) |
C3—H3 | 0.9300 | C17—C18 | 1.405 (5) |
C4—N2 | 1.457 (5) | C17—H17 | 0.9300 |
C4—C5 | 1.507 (6) | C18—C20 | 1.387 (6) |
C4—H4A | 0.9700 | C18—C19 | 1.496 (5) |
C4—H4B | 0.9700 | C19—O2 | 1.260 (5) |
C5—C7 | 1.383 (6) | C19—O1 | 1.274 (5) |
C5—C6 | 1.385 (7) | C20—C21 | 1.395 (5) |
C6—C10 | 1.377 (7) | C20—H20 | 0.9300 |
C6—H6 | 0.9300 | C21—O5 | 1.359 (5) |
C7—C8 | 1.386 (6) | C21—C22 | 1.375 (5) |
C7—H7 | 0.9300 | C22—H22 | 0.9300 |
C8—C9 | 1.386 (7) | N4—Cd1iii | 2.244 (3) |
C8—H8 | 0.9300 | O3—Cd1iv | 2.384 (3) |
C9—C10 | 1.390 (6) | O4—Cd1iv | 2.554 (3) |
C9—C11 | 1.512 (6) | O5—H5 | 0.814 (10) |
C10—H10 | 0.9300 | O1W—HW11 | 0.846 (10) |
C11—N3 | 1.463 (5) | O1W—HW12 | 0.847 (10) |
C11—H11A | 0.9700 | ||
N4i—Cd1—N1 | 166.24 (13) | N3—C11—H11B | 108.9 |
N4i—Cd1—O3ii | 110.30 (11) | C9—C11—H11B | 108.9 |
N1—Cd1—O3ii | 82.34 (11) | H11A—C11—H11B | 107.7 |
N4i—Cd1—O2 | 92.80 (11) | C13—C12—N3 | 106.4 (4) |
N1—Cd1—O2 | 82.46 (11) | C13—C12—H12 | 126.8 |
O3ii—Cd1—O2 | 130.03 (10) | N3—C12—H12 | 126.8 |
N4i—Cd1—O1W | 83.67 (12) | C12—C13—N4 | 109.4 (4) |
N1—Cd1—O1W | 83.19 (12) | C12—C13—H13 | 125.3 |
O3ii—Cd1—O1W | 137.45 (11) | N4—C13—H13 | 125.3 |
O2—Cd1—O1W | 87.01 (12) | N4—C14—N3 | 111.3 (4) |
N4i—Cd1—O1 | 100.22 (10) | N4—C14—H14 | 124.4 |
N1—Cd1—O1 | 87.43 (11) | N3—C14—H14 | 124.4 |
O3ii—Cd1—O1 | 78.21 (9) | O3—C15—O4 | 120.2 (4) |
O2—Cd1—O1 | 53.80 (10) | O3—C15—C16 | 119.2 (4) |
O1W—Cd1—O1 | 140.62 (11) | O4—C15—C16 | 120.6 (3) |
N4i—Cd1—O4ii | 86.42 (11) | C22—C16—C17 | 119.4 (3) |
N1—Cd1—O4ii | 97.77 (11) | C22—C16—C15 | 119.5 (3) |
O3ii—Cd1—O4ii | 52.44 (9) | C17—C16—C15 | 121.0 (3) |
O2—Cd1—O4ii | 177.49 (12) | C16—C17—C18 | 119.7 (4) |
O1W—Cd1—O4ii | 90.53 (11) | C16—C17—H17 | 120.2 |
O1—Cd1—O4ii | 128.69 (9) | C18—C17—H17 | 120.2 |
C2—C1—N1 | 110.0 (4) | C20—C18—C17 | 119.7 (3) |
C2—C1—H1 | 125.0 | C20—C18—C19 | 120.4 (4) |
N1—C1—H1 | 125.0 | C17—C18—C19 | 119.9 (4) |
C1—C2—N2 | 105.8 (4) | O2—C19—O1 | 123.1 (3) |
C1—C2—H2 | 127.1 | O2—C19—C18 | 119.3 (4) |
N2—C2—H2 | 127.1 | O1—C19—C18 | 117.7 (4) |
N1—C3—N2 | 111.2 (3) | C18—C20—C21 | 120.3 (4) |
N1—C3—H3 | 124.4 | C18—C20—H20 | 119.8 |
N2—C3—H3 | 124.4 | C21—C20—H20 | 119.8 |
N2—C4—C5 | 114.1 (3) | O5—C21—C22 | 122.7 (3) |
N2—C4—H4A | 108.7 | O5—C21—C20 | 117.8 (4) |
C5—C4—H4A | 108.7 | C22—C21—C20 | 119.5 (4) |
N2—C4—H4B | 108.7 | C21—C22—C16 | 121.3 (3) |
C5—C4—H4B | 108.7 | C21—C22—H22 | 119.3 |
H4A—C4—H4B | 107.6 | C16—C22—H22 | 119.3 |
C7—C5—C6 | 117.3 (4) | C3—N1—C1 | 105.2 (3) |
C7—C5—C4 | 117.7 (4) | C3—N1—Cd1 | 122.9 (3) |
C6—C5—C4 | 125.0 (4) | C1—N1—Cd1 | 131.7 (3) |
C10—C6—C5 | 121.9 (5) | C3—N2—C2 | 107.8 (3) |
C10—C6—H6 | 119.1 | C3—N2—C4 | 125.3 (3) |
C5—C6—H6 | 119.1 | C2—N2—C4 | 126.8 (3) |
C5—C7—C8 | 121.7 (4) | C14—N3—C12 | 107.2 (3) |
C5—C7—H7 | 119.2 | C14—N3—C11 | 126.9 (4) |
C8—C7—H7 | 119.2 | C12—N3—C11 | 125.9 (4) |
C7—C8—C9 | 120.3 (4) | C14—N4—C13 | 105.7 (3) |
C7—C8—H8 | 119.9 | C14—N4—Cd1iii | 129.8 (3) |
C9—C8—H8 | 119.9 | C13—N4—Cd1iii | 124.4 (3) |
C8—C9—C10 | 118.4 (4) | C19—O1—Cd1 | 88.3 (2) |
C8—C9—C11 | 121.5 (4) | C19—O2—Cd1 | 92.1 (2) |
C10—C9—C11 | 120.0 (5) | C15—O3—Cd1iv | 97.2 (2) |
C6—C10—C9 | 120.4 (5) | C15—O4—Cd1iv | 89.0 (2) |
C6—C10—H10 | 119.8 | C21—O5—H5 | 120 (4) |
C9—C10—H10 | 119.8 | Cd1—O1W—HW11 | 126 (3) |
N3—C11—C9 | 113.4 (4) | Cd1—O1W—HW12 | 128 (3) |
N3—C11—H11A | 108.9 | HW11—O1W—HW12 | 106 (4) |
C9—C11—H11A | 108.9 |
Symmetry codes: (i) x, y+1, z−1; (ii) x+1/2, −y+1, z−1/2; (iii) x, y−1, z+1; (iv) x−1/2, −y+1, z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5···O4v | 0.81 (1) | 1.89 (2) | 2.675 (4) | 162 (5) |
O1W—HW12···O3vi | 0.85 (1) | 2.00 (2) | 2.813 (4) | 161 (5) |
O1W—HW11···O1vii | 0.85 (1) | 2.29 (4) | 2.935 (4) | 133 (4) |
Symmetry codes: (v) x+1/2, −y+1, z+1/2; (vi) x, y, z−1; (vii) x−1/2, −y+1, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Cd(C8H4O5)(C14H14N4)(H2O)] |
Mr | 548.82 |
Crystal system, space group | Monoclinic, Pn |
Temperature (K) | 293 |
a, b, c (Å) | 11.5800 (9), 8.4221 (6), 11.6393 (9) |
β (°) | 113.354 (1) |
V (Å3) | 1042.16 (14) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 1.10 |
Crystal size (mm) | 0.18 × 0.16 × 0.11 |
Data collection | |
Diffractometer | Bruker APEX diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.39, 0.57 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6155, 3693, 3404 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.028, 0.054, 1.02 |
No. of reflections | 3693 |
No. of parameters | 307 |
No. of restraints | 6 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.38, −0.39 |
Absolute structure | Flack (1983), ???? Friedel pairs |
Absolute structure parameter | −0.013 (19) |
Computer programs: SMART (Bruker, 1997), SAINT (Bruker, 1999), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL-Plus (Sheldrick, 2008), publCIF (Westrip, 2010).
Cd1—N4i | 2.244 (3) | Cd1—O1W | 2.465 (3) |
Cd1—N1 | 2.282 (3) | Cd1—O1 | 2.499 (3) |
Cd1—O3ii | 2.384 (3) | Cd1—O4ii | 2.554 (3) |
Cd1—O2 | 2.423 (3) | ||
N4i—Cd1—N1 | 166.24 (13) | N1—Cd1—O1 | 87.43 (11) |
N4i—Cd1—O3ii | 110.30 (11) | O3ii—Cd1—O1 | 78.21 (9) |
N1—Cd1—O3ii | 82.34 (11) | O2—Cd1—O1 | 53.80 (10) |
N4i—Cd1—O2 | 92.80 (11) | O1W—Cd1—O1 | 140.62 (11) |
N1—Cd1—O2 | 82.46 (11) | N4i—Cd1—O4ii | 86.42 (11) |
O3ii—Cd1—O2 | 130.03 (10) | N1—Cd1—O4ii | 97.77 (11) |
N4i—Cd1—O1W | 83.67 (12) | O3ii—Cd1—O4ii | 52.44 (9) |
N1—Cd1—O1W | 83.19 (12) | O2—Cd1—O4ii | 177.49 (12) |
O3ii—Cd1—O1W | 137.45 (11) | O1W—Cd1—O4ii | 90.53 (11) |
O2—Cd1—O1W | 87.01 (12) | O1—Cd1—O4ii | 128.69 (9) |
N4i—Cd1—O1 | 100.22 (10) |
Symmetry codes: (i) x, y+1, z−1; (ii) x+1/2, −y+1, z−1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5···O4iii | 0.814 (10) | 1.888 (19) | 2.675 (4) | 162 (5) |
O1W—HW12···O3iv | 0.847 (10) | 2.00 (2) | 2.813 (4) | 161 (5) |
O1W—HW11···O1v | 0.846 (10) | 2.29 (4) | 2.935 (4) | 133 (4) |
Symmetry codes: (iii) x+1/2, −y+1, z+1/2; (iv) x, y, z−1; (v) x−1/2, −y+1, z−1/2. |
Acknowledgements
We thank Jilin Normal University and the University of Malaya for supporting this study.
References
Abrahams, B. F., Batten, S. R., Grannas, M. J., Hamit, H., Hoskins, B. F. & Robson, R. (1999). Angew. Chem. Int. Ed. 38, 1475–1477. Web of Science CrossRef CAS Google Scholar
Batten, S. R. (2001). CrystEngComm, 18, 1–7. Google Scholar
Batten, S. R. & Robson, R. (1998). Angew. Chem. Int. Ed. 37, 1460–1494. Web of Science CrossRef Google Scholar
Bruker (1997). SMART. Version 5.622. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Bruker (1999). SAINT. Version 6.02. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Carlucci, L., Ciani, G. & Proserpio, D. M. (2003). Coord. Chem. Rev. 246, 247–289. Web of Science CrossRef CAS Google Scholar
Flack, H. D. (1983). Acta Cryst. A39, 876–881. CrossRef CAS Web of Science IUCr Journals Google Scholar
Ma, L.-F., Wang, L.-Y., Hu, J.-L., Wang, Y.-Y. & Yang, G.-P. (2009). Cryst. Growth Des. 9, 5334–5342. CrossRef CAS Google Scholar
O'Keeffe, M., Peskov, M. A., Ramsden, S. J. & Yaghi, O. M. (2008). Acc. Chem. Res. 41, 1782–1789. Web of Science CrossRef PubMed CAS Google Scholar
Qiao, Q., Zhao, Y.-J. & Tang, T.-D. (2008). Acta Cryst. C64, m336–m338. Web of Science CSD CrossRef IUCr Journals Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Wang, X.-L., Qin, C., Wang, E.-B. & Su, Z.-M. (2006). Chem. Eur. J. 12, 2680–2691. Web of Science CSD CrossRef PubMed CAS Google Scholar
Westrip, S. P. (2010). J. Appl. Cryst. 43, 920–925. Web of Science CrossRef CAS IUCr Journals Google Scholar
Xia, D.-C., Yao, J.-H., Zhang, W.-C., Huang, R.-Q., Yang, X.-Q. & Jing, J.-J. (2011). Z. Kristallogr. New Cryst. Struct. 226, 17–18. CAS Google Scholar
Xu, G. & Xie, Y. (2010). Acta Cryst. C66, m201–m203. Web of Science CSD CrossRef IUCr Journals Google Scholar
Yang, J., Ma, J.-F., Batten, S. R. & Su, Z.-M. (2008). Chem. Commun. pp. 2233–2235. Web of Science CSD CrossRef Google Scholar
Yang, J., Ma, J.-F., Liu, Y.-Y. & Batten, S. R. (2009). CrystEngComm, 11, 151–159. Web of Science CSD CrossRef CAS Google Scholar
Zhang, J., Chen, Y.-B., Li, Z.-J., Qin, Y.-Y. & Yao, Y.-G. (2006). Inorg. Chem. Commun. 9, 449–451. Web of Science CSD CrossRef CAS Google Scholar
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The design and synthesis of metal–organic frameworks (MOFs) have been an area of rapid growth in recent years owing to the potential applications of MOFs in nonlinear optics, luminescence, magnetism, catalysis, gas absorption, ion exchange and as zeolite-like materials for molecular selection (O'Keeffe et al., 2008). Structural diversity in MOFs can occur as a result of various processes, including supramolecular isomerism, interpenetration or interweaving (Batten & Robson, 1998; Batten, 2001). Ideally, the topologies of MOFs can be controlled and modified by the coordination geometry preferred by the metal ion and the chemical structure of the organic ligand chosen (Abrahams et al., 1999; Yang et al., 2008). In this regard, rigid N-donor 4,4'-bipyridine (bipy) and its derivatives have been studied in the construction of MOFs (Qiao et al., 2008). So far, a number of MOFs based on bipy and its derivatives have been reported, including one-dimensional chain, two-dimensional layer and three-dimensional frameworks (Carlucci et al., 2003). However, reports of MOFs constructed by flexible N-donor ligands are relatively rare (Wang et al., 2006). Among such ligands, bis(imidazole) derivatives are a good choice (Yang et al., 2008) leading to some intriguing interpenetrating architectures and topologies (Wang et al., 2006). In this work, we chose 5-hydroxybenzene-1,3-dicarboxylic acid (5-OH-1,3-H2bdc) as a dicarboxylate ligand and 1,4-bis(imidazol-1-ylmethyl)benzene (1,4-bix) as a flexible N-donor ligand, yielding a new coordination polymer, [Cd(1,4-bix)(5-OH-1,3-bdc)(H2O)], (I), with a fascinating twofold interpenetrated three-dimensional CdSO4-like framework.
The asymetric unit of (I) contains one CdII atom, one 5-OH-1,3-bdc anion, one 1,4-bix ligand and one coordination water molecule (Fig. 1). Each CdII atom is seven-coordinated in a pentagonal bipyramid by four carboxylate oxygen atoms from two different 5-OH-1,3-bdc anions, one water oxygen atom and two nitrogen atoms from two distinct 1,4-bix ligands. The N atoms occupy the apical sites and the O atoms occupy the equatorial sites of the bipyramid. The Cd—Ocarboxylate distances (Table 1) are comparable to those observed in [Cd(bpdo)(1,4-bdc)(H2O)]n (1,4-bdc = benzene-1,4-dicarboxylate and bpdo = 4,4'-bipyridine N,N'-dioxide) (Xu & Xie, 2010).
Each crystallographically unique CdII atom is bridged by the 1,4-bix ligands and 5-OH-1,3-bdc anions to generate a novel three-dimensional framework (Fig. 2). The Cd···Cd distances bridged by 1,4-bix and 5-OH-1,3-bdc are 14.368 (3) and 9.844 (3) Å, respectively. Topologically, the CdII centre is defined as a four-connected node, and the 1,4-bix and the 5-OH-1,3-bdc serve as linkers. Therefore, on the basis of the concept of chemical topology, the overall structure of (I) is a four-connected framework with the Schläfli symbol of 658. Topological analysis reveals that this three-dimensional framework is a typical CdSO4 net. Interestingly, the large spaces in the single three-dimensional framework allow another identical framework to interpenetrate it, providing a twofold interpenetrating CdSO4 framework (Fig. 3). Each CdSO4 net is hydrogen bonded to its neighbour through O—H···O hydrogen bonds among the water molecules, hydroxy group and carboxylate oxygen atoms (Table 2).
So far, some related interpenetrated CdSO4-like MOFs based on both dicarboxylate and flexible N-donor bridging ligands have been reported. The structure of [Zn2(1,4-bdc)(bpp)Cl2]n (1,4-bdc = 1,4-benzenedicarboxylate and bpp = 1,3-bis(4-pyridyl)propane) (Zhang et al., 2006) also contains two crystallographically equivalent nets, but differs from (I) in that the four-connected nodes are based on ZnII dimers rather than mononuclear complexes. [Zn(mip)(bpa)]n [mip = 5-methylisophthalate and bpa = 1,2-bis(4-pyridyl)ethane] (Ma et al., 2009) shows an unusual threefold interpenetrated CdSO4 topology. [Ni(oba)(bbi)]2.H2O [oba = 4,4'-oxybis(benzoate) and bbi = 1,1'-(1,4-butanediyl)bis(imidazole)] (Yang et al., 2009) also shows twofold interpenetrated nets as in (I); however, the nets are crystallographically distinct. Thus, we believe that (I) represents the first example of this specific type of architecture in a Cd–dicarboxylate–flexible-N-donor system.