metal-organic compounds
Poly[aqua[μ3-5-(2-carboxylatophenyl)-1H-tetrazolato]zinc(II)]
aOrdered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, People's Republic of China
*Correspondence e-mail: quzr@seu.edu.cn
The title coordination polymer, [Zn(C8H4N4O2)(H2O)]n, was prepared by the hydrothermal reaction of zinc nitrate and 2-(1H-tetrazol-5-yl)benzoic acid. Two types of coordinated zinc cations exist in the structure. One is tetrahedrally coordinated by two O and two N from two ligands, the other is octahedrally coordinated by two N and two O from two ligands at equatorial sites and by two O atoms of water molecules at axial sites, resulting in a two-dimensional framework. The is stabilized by intramolecular O—H⋯O and O—H⋯N hydrogen bonds.
Related literature
For the chemistry of tetrazoles, see: Xiong et al. (2002); Xue et al. (2002); Dunica et al. (1991); Wang et al. (2005); Wittenberger et al. (1993); Hu et al. (2007). For the of a related compound, see: Li et al. (2005).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku, 2005); cell CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: PRPKAPPA (Ferguson, 1999).
Supporting information
10.1107/S1600536808013688/rz2210sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808013688/rz2210Isup2.hkl
A mixture of Zn(NO3)2 (0.2 mmol) and 2-(1H-tetrazol-5-yl)benzoic acid (0.2 mmol) in H2O (4 ml) was heated in Pyrex tube at 100°C for two days. After slowly cooling down to room temperature over a period of 12 h, colourless crystals of the title compound suitable for diffraction were isolated.
Positional parameters of all the H atoms were calculated geometrically and were allowed to ride on their parent atoms, with C—H = 0.93 Å, O—H = 0.81Å and with Uiso(H) = 1.2 Ueq(C) or 1.5 Ueq(O).
Data collection: CrystalClear (Rigaku, 2005); cell
CrystalClear (Rigaku, 2005); data reduction: CrystalClear (Rigaku, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: PRPKAPPA (Ferguson, 1999).[Zn(C8H4N4O2)(H2O)] | F(000) = 1088.0 |
Mr = 271.56 | Dx = 1.888 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 1979 reflections |
a = 19.696 (8) Å | θ = 3.1–27.5° |
b = 7.1340 (18) Å | µ = 2.57 mm−1 |
c = 14.932 (6) Å | T = 293 K |
β = 114.39 (2)° | Block, colourless |
V = 1910.9 (12) Å3 | 0.07 × 0.07 × 0.06 mm |
Z = 8 |
Rigaku SCXmini diffractometer | 2173 independent reflections |
Radiation source: fine-focus sealed tube | 1623 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.085 |
Detector resolution: 13.6612 pixels mm-1 | θmax = 27.5°, θmin = 3.1° |
ω scans | h = −25→25 |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | k = −9→9 |
Tmin = 0.835, Tmax = 0.860 | l = −19→19 |
9320 measured reflections |
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) = 0.112 | H-atom parameters constrained |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0929P)2 + 0.0509P] whereP = (Fo2 + 2Fc2)/3 |
2173 reflections | (Δ/σ)max < 0.001 |
147 parameters | Δρmax = 0.63 e Å−3 |
0 restraints | Δρmin = −0.60 e Å−3 |
[Zn(C8H4N4O2)(H2O)] | V = 1910.9 (12) Å3 |
Mr = 271.56 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 19.696 (8) Å | µ = 2.57 mm−1 |
b = 7.1340 (18) Å | T = 293 K |
c = 14.932 (6) Å | 0.07 × 0.07 × 0.06 mm |
β = 114.39 (2)° |
Rigaku SCXmini diffractometer | 2173 independent reflections |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | 1623 reflections with I > 2σ(I) |
Tmin = 0.835, Tmax = 0.860 | Rint = 0.085 |
9320 measured reflections |
R[F2 > 2σ(F2)] = 0.050 | 0 restraints |
wR(F2) = 0.112 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.63 e Å−3 |
2173 reflections | Δρmin = −0.60 e Å−3 |
147 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 F^2^ against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F^2^, conventional R-factors R are based on F, with F set to zero for negative F^2^. The threshold expression of F^2^ > σ(F^2^) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F^2^ 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 | ||
Zn1 | 1.0000 | −0.31787 (9) | 0.2500 | 0.0245 (2) | |
Zn2 | 1.0000 | 0.0000 | 0.5000 | 0.0242 (2) | |
C1 | 0.9761 (2) | 0.3503 (5) | 0.3649 (3) | 0.0202 (8) | |
C2 | 0.8990 (2) | 0.3170 (6) | 0.2905 (3) | 0.0213 (8) | |
C3 | 0.8527 (2) | 0.4731 (6) | 0.2629 (3) | 0.0289 (10) | |
H3 | 0.8693 | 0.5859 | 0.2959 | 0.035* | |
C4 | 0.7821 (3) | 0.4630 (6) | 0.1866 (4) | 0.0383 (12) | |
H4 | 0.7514 | 0.5681 | 0.1693 | 0.046* | |
C5 | 0.7577 (3) | 0.2978 (7) | 0.1370 (4) | 0.0410 (12) | |
H5 | 0.7104 | 0.2910 | 0.0858 | 0.049* | |
C6 | 0.8032 (3) | 0.1407 (6) | 0.1630 (3) | 0.0339 (11) | |
H6 | 0.7864 | 0.0299 | 0.1279 | 0.041* | |
C7 | 0.8733 (2) | 0.1459 (6) | 0.2405 (3) | 0.0222 (9) | |
C8 | 0.9165 (2) | −0.0327 (5) | 0.2671 (3) | 0.0217 (9) | |
N1 | 1.0151 (2) | 0.2573 (5) | 0.4466 (2) | 0.0241 (8) | |
N2 | 1.0788 (2) | 0.3533 (5) | 0.4939 (3) | 0.0295 (9) | |
N3 | 1.0792 (2) | 0.4999 (5) | 0.4424 (3) | 0.0280 (8) | |
N4 | 1.01491 (19) | 0.5018 (4) | 0.3598 (2) | 0.0220 (7) | |
O1 | 0.91662 (17) | −0.1326 (4) | 0.1958 (2) | 0.0270 (7) | |
O2 | 0.94994 (17) | −0.0846 (4) | 0.3536 (2) | 0.0314 (7) | |
O1W | 0.89412 (16) | 0.0990 (4) | 0.4984 (2) | 0.0322 (7) | |
H1W | 0.8913 | 0.0681 | 0.5497 | 0.048* | |
H2W | 0.8872 | 0.2061 | 0.5035 | 0.048* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Zn1 | 0.0335 (4) | 0.0167 (3) | 0.0215 (4) | 0.000 | 0.0097 (3) | 0.000 |
Zn2 | 0.0341 (4) | 0.0186 (4) | 0.0186 (4) | −0.0009 (3) | 0.0097 (3) | 0.0027 (3) |
C1 | 0.026 (2) | 0.0153 (19) | 0.021 (2) | −0.0018 (17) | 0.0104 (17) | 0.0000 (16) |
C2 | 0.021 (2) | 0.022 (2) | 0.0183 (19) | −0.0016 (17) | 0.0057 (17) | 0.0025 (16) |
C3 | 0.032 (2) | 0.023 (2) | 0.030 (2) | 0.0042 (19) | 0.011 (2) | 0.0001 (18) |
C4 | 0.031 (3) | 0.033 (3) | 0.045 (3) | 0.013 (2) | 0.009 (2) | 0.003 (2) |
C5 | 0.026 (2) | 0.043 (3) | 0.039 (3) | 0.004 (2) | −0.002 (2) | −0.001 (2) |
C6 | 0.029 (2) | 0.029 (2) | 0.035 (3) | 0.001 (2) | 0.004 (2) | −0.004 (2) |
C7 | 0.024 (2) | 0.019 (2) | 0.022 (2) | 0.0019 (17) | 0.0094 (18) | 0.0021 (16) |
C8 | 0.023 (2) | 0.021 (2) | 0.021 (2) | −0.0050 (16) | 0.0088 (18) | −0.0013 (16) |
N1 | 0.032 (2) | 0.0186 (17) | 0.0189 (17) | −0.0044 (15) | 0.0083 (16) | 0.0033 (14) |
N2 | 0.029 (2) | 0.0235 (19) | 0.030 (2) | −0.0030 (16) | 0.0062 (17) | 0.0079 (16) |
N3 | 0.031 (2) | 0.0223 (19) | 0.0235 (19) | −0.0053 (15) | 0.0041 (17) | 0.0025 (14) |
N4 | 0.0271 (18) | 0.0168 (17) | 0.0210 (18) | −0.0020 (14) | 0.0088 (15) | 0.0001 (13) |
O1 | 0.0390 (18) | 0.0226 (15) | 0.0179 (14) | 0.0056 (13) | 0.0101 (13) | −0.0029 (12) |
O2 | 0.048 (2) | 0.0232 (16) | 0.0191 (15) | 0.0050 (14) | 0.0100 (15) | −0.0004 (12) |
O1W | 0.0385 (18) | 0.0309 (17) | 0.0284 (17) | 0.0003 (15) | 0.0150 (15) | −0.0012 (14) |
Zn1—O1i | 2.000 (3) | C3—H3 | 0.9300 |
Zn1—O1 | 2.000 (3) | C4—C5 | 1.369 (6) |
Zn1—N4ii | 2.008 (3) | C4—H4 | 0.9300 |
Zn1—N4iii | 2.008 (3) | C5—C6 | 1.387 (6) |
Zn2—N1 | 2.072 (3) | C5—H5 | 0.9300 |
Zn2—N1iv | 2.072 (3) | C6—C7 | 1.389 (6) |
Zn2—O2iv | 2.082 (3) | C6—H6 | 0.9300 |
Zn2—O2 | 2.082 (3) | C7—C8 | 1.491 (5) |
Zn2—O1Wiv | 2.193 (3) | C8—O2 | 1.240 (5) |
Zn2—O1W | 2.193 (3) | C8—O1 | 1.281 (5) |
C1—N1 | 1.321 (5) | N1—N2 | 1.345 (5) |
C1—N4 | 1.343 (5) | N2—N3 | 1.300 (4) |
C1—C2 | 1.484 (5) | N3—N4 | 1.353 (5) |
C2—C3 | 1.390 (5) | N4—Zn1v | 2.008 (3) |
C2—C7 | 1.411 (5) | O1W—H1W | 0.8200 |
C3—C4 | 1.389 (6) | O1W—H2W | 0.7851 |
O1i—Zn1—O1 | 97.27 (17) | C2—C3—H3 | 119.5 |
O1i—Zn1—N4ii | 124.90 (13) | C5—C4—C3 | 119.8 (4) |
O1—Zn1—N4ii | 105.93 (12) | C5—C4—H4 | 120.1 |
O1i—Zn1—N4iii | 105.93 (12) | C3—C4—H4 | 120.1 |
O1—Zn1—N4iii | 124.90 (13) | C4—C5—C6 | 120.2 (4) |
N4ii—Zn1—N4iii | 100.34 (19) | C4—C5—H5 | 119.9 |
N1—Zn2—N1iv | 180.000 (1) | C6—C5—H5 | 119.9 |
N1—Zn2—O2iv | 93.81 (13) | C5—C6—C7 | 121.1 (4) |
N1iv—Zn2—O2iv | 86.19 (13) | C5—C6—H6 | 119.4 |
N1—Zn2—O2 | 86.19 (13) | C7—C6—H6 | 119.4 |
N1iv—Zn2—O2 | 93.81 (13) | C6—C7—C2 | 118.7 (4) |
O2iv—Zn2—O2 | 180.000 (1) | C6—C7—C8 | 117.4 (4) |
N1—Zn2—O1Wiv | 90.11 (13) | C2—C7—C8 | 123.9 (3) |
N1iv—Zn2—O1Wiv | 89.89 (13) | O2—C8—O1 | 121.1 (4) |
O2iv—Zn2—O1Wiv | 92.66 (12) | O2—C8—C7 | 122.1 (4) |
O2—Zn2—O1Wiv | 87.34 (12) | O1—C8—C7 | 116.8 (4) |
N1—Zn2—O1W | 89.89 (13) | C1—N1—N2 | 106.9 (3) |
N1iv—Zn2—O1W | 90.11 (13) | C1—N1—Zn2 | 132.8 (3) |
O2iv—Zn2—O1W | 87.34 (12) | N2—N1—Zn2 | 120.0 (3) |
O2—Zn2—O1W | 92.66 (12) | N3—N2—N1 | 109.3 (3) |
O1Wiv—Zn2—O1W | 180.000 (1) | N2—N3—N4 | 108.4 (3) |
N1—C1—N4 | 109.2 (4) | C1—N4—N3 | 106.3 (3) |
N1—C1—C2 | 129.5 (4) | C1—N4—Zn1v | 131.8 (3) |
N4—C1—C2 | 121.1 (3) | N3—N4—Zn1v | 121.1 (3) |
C3—C2—C7 | 119.2 (4) | C8—O1—Zn1 | 108.4 (3) |
C3—C2—C1 | 115.9 (4) | C8—O2—Zn2 | 145.6 (3) |
C7—C2—C1 | 124.5 (4) | Zn2—O1W—H1W | 109.5 |
C4—C3—C2 | 120.9 (4) | Zn2—O1W—H2W | 121.0 |
C4—C3—H3 | 119.5 | H1W—O1W—H2W | 95.2 |
Symmetry codes: (i) −x+2, y, −z+1/2; (ii) −x+2, y−1, −z+1/2; (iii) x, y−1, z; (iv) −x+2, −y, −z+1; (v) x, y+1, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1W···O1vi | 0.82 | 2.08 | 2.804 (4) | 147 |
O1W—H2W···N3vii | 0.79 | 2.25 | 2.976 (5) | 155 |
Symmetry codes: (vi) x, −y, z+1/2; (vii) −x+2, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Zn(C8H4N4O2)(H2O)] |
Mr | 271.56 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 293 |
a, b, c (Å) | 19.696 (8), 7.1340 (18), 14.932 (6) |
β (°) | 114.39 (2) |
V (Å3) | 1910.9 (12) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 2.57 |
Crystal size (mm) | 0.07 × 0.07 × 0.06 |
Data collection | |
Diffractometer | Rigaku SCXmini diffractometer |
Absorption correction | Multi-scan (CrystalClear; Rigaku, 2005) |
Tmin, Tmax | 0.835, 0.860 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9320, 2173, 1623 |
Rint | 0.085 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.050, 0.112, 1.08 |
No. of reflections | 2173 |
No. of parameters | 147 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.63, −0.60 |
Computer programs: CrystalClear (Rigaku, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008), PRPKAPPA (Ferguson, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1W···O1i | 0.82 | 2.08 | 2.804 (4) | 147.2 |
O1W—H2W···N3ii | 0.79 | 2.25 | 2.976 (5) | 155.0 |
Symmetry codes: (i) x, −y, z+1/2; (ii) −x+2, −y+1, −z+1. |
Acknowledgements
This work was supported by a Start-up Grant from Southeast University to ZRQ.
References
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Coordination frameworks have received much attention over the past decade because of their potential applications. Multifunctional organic ligands are necessary to construct such frameworks. 2-(1H-Tetrazol-5-yl)benzoic acid is a ligand with two functional groups, a carboxylate group and a tetrazole ring. Tetrazole compounds have a wide range of applications in coordination chemistry, medicinal chemistry and material science (Hu, et al., 2007; Xiong, et al., 2002; Xue, et al., 2002; Wang, et al., 2005; Dunica, et al., 1991; Wittenberger & Donner, 1993). We report here the crystal structure of the title compound, which was obtained by the hydrothermal reaction of zinc nitrate and 2-(1H-tetrazol-5-yl)benzoic acid.
In the structure of the title compound, two types of coordinated zinc cations exist (Fig. 1). Zn1 is tetrahedrally coordinated by two O and two N from two ligands, while Zn2 is octahedrally coordinated, with two N and two O from two ligands at equatorial sites and two O atoms of H2O molecules at axial sites, resulting in a two-dimensional framework (Fig 2). Bond lengths and angles in the compound are within normal ranges (Li et al., 2005). The crystal structure is stabilized by intramolecular O—H···O and O—H···N hydrogen bonds (Table 1).