metal-organic compounds
κ4O,2κ2O-bis(μ3-pyridine-2,4-dicarboxylato-1κO2:2κ2N,O2′;1′κO4)cobalt(II)strontium(II)] dihydrate]
of poly[[hexaqua-1aCollege of Chemical Engineering, Huanggang Normal University, Huanggang 438000, People's Republic of China
*Correspondence e-mail: cingym@163.com
In the title polymeric complex, {[CoSr(C7H3NO4)2(H2O)6]·2H2O}n, the CoII ion, which is situated on a crystallographic centre of inversion, is six-coordinated by two O atoms and two N atoms from two pyridine-2,4-dicarboxylate (pydc2−) ligands and two terminal water molecules in a slightly distorted octahedral geometry, to form a trans-[Co(pydc)2(H2O)2]2− unit. The SrII ion, situated on a C2 axis, is coordinated by four O atoms from four pydc2− ligands and four water molecules. The coordination geometry of the SrII atom can be best described as a distorted dodecahedron. Each SrII ion bridges four [Co(pydc)2(H2O)2]2− units by four COO− groups of four pydc2− ligands to form a three-dimensional network structure. Two additional solvent water molecules are observed in the and are connected to the three-dimensional coordination polymer by O—H⋯O hydrogen bonds. Further intra- and intermolecular O—H⋯O hydrogen bonds consolidate the overall structure.
Keywords: crystal structure; heterometallic complex; pyridine-2,4-dicarboxylic acid heterometallic complex.
CCDC reference: 761895
1. Related literature
For similar heterometallic complexes, see: Chen et al. (2014, 2015); Gil de Muro et al. (1999); Li et al. (1989); Mege-Revil & Price (2013); Zasurskaya et al. (2000, 2001, 2006); Zhang (1993); Zhang et al. (1992).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2005); cell SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL.
Supporting information
CCDC reference: 761895
https://doi.org/10.1107/S2056989015014942/im2469sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989015014942/im2469Isup2.hkl
As an N,O-containing ligand, pyridine-2,4-dicarboxylic acid (pydc) possesses different binding sites with specific affinities to discriminate different metal ions. It coordinates to alkaline earth metals by using the oxygen atoms to form 'complex-ligands', and the 'complex-ligands' then bind with other metal ions to generate heterometallic coordination polymers. In our previous work, two heterometallic complexes containing CoII and SrII ions were reported (Chen et al., 2015; Chen et al., 2014). As a continuation of our previous work, in this paper a new Co—Sr-pydc complex is reported.
A mixture of pyridine-2,4-dicarboxylic acid (0.0337 g, 0.2 mmol), Sr(OH)2·8 H2O (0.0262 g, 0.1 mmol), Co(OAc)2·4H2O (0.0244 g,0.1 mmol), and H2O (2 ml) was sealed in a pyrex-bottle (8 ml) and heated to 90°C for 2 days. The tube was then cooled to room temperature, generating yellow rod crystals. Yield: 0.0225 g (37%, based on Co). Elemental analysis calc. for C14H22CoN2O16Sr: C, 27.08; H, 3.57; N, 4.51%. Found: C,27.32; H, 3.57; N, 4.53%.
H atoms bonded to C atoms of the pyridine ring were positioned geometrically and refined as riding atoms, with C—H = 0.97 Å, and with Uiso(H) = 1.2 Ueq(C). The water H atoms were located from a difference Fourier map and refined with restraints of O—H = 0.86 (1) Å and Uiso(H) = 1.5 Ueq(O).
In the title polymeric complex, [C14H18CoN2O14Sr]n·2n H2O, the CoII ion, which is situated on a crystallographic centre of inversion, is six-coordinated by two oxygen atoms and two nitrogen atoms from two pyridine-2,4-dicarboxylate (pydc2-) ligands and two terminal water molecules in a slightly distorted octahedral geometry, to form a trans-[Co(pydc)2(H2O)2]2- unit. The SrII ion being situated on the C2-axis is coordinated by four oxygen atoms from four pydc2- ligands and four water molecules. The coordination geometry of the SrII atom can be best described as a distorted dodecahedron. Each SrII ion bridges four [Co(pydc)2(H2O)2]2- units by four COO- groups of four pydc2- ligands to form a three-dimensional network structure. The structure is also built up by hydrogen bond interactions between coordinated water molecules and carboxylic groups of pydc2- ligands. Sovent water molecules are connected to the 3-D network by three intermolecular hydrogen bond interactions O6—H6B···O8, O8—H8A···O6 and O3—H8B···O3.
As an N,O-containing ligand, pyridine-2,4-dicarboxylic acid (pydc) possesses different binding sites with specific affinities to discriminate different metal ions. It coordinates to alkaline earth metals by using the oxygen atoms to form 'complex-ligands', and the 'complex-ligands' then bind with other metal ions to generate heterometallic coordination polymers. In our previous work, two heterometallic complexes containing CoII and SrII ions were reported (Chen et al., 2015; Chen et al., 2014). As a continuation of our previous work, in this paper a new Co—Sr-pydc complex is reported.
In the title polymeric complex, [C14H18CoN2O14Sr]n·2n H2O, the CoII ion, which is situated on a crystallographic centre of inversion, is six-coordinated by two oxygen atoms and two nitrogen atoms from two pyridine-2,4-dicarboxylate (pydc2-) ligands and two terminal water molecules in a slightly distorted octahedral geometry, to form a trans-[Co(pydc)2(H2O)2]2- unit. The SrII ion being situated on the C2-axis is coordinated by four oxygen atoms from four pydc2- ligands and four water molecules. The coordination geometry of the SrII atom can be best described as a distorted dodecahedron. Each SrII ion bridges four [Co(pydc)2(H2O)2]2- units by four COO- groups of four pydc2- ligands to form a three-dimensional network structure. The structure is also built up by hydrogen bond interactions between coordinated water molecules and carboxylic groups of pydc2- ligands. Sovent water molecules are connected to the 3-D network by three intermolecular hydrogen bond interactions O6—H6B···O8, O8—H8A···O6 and O3—H8B···O3.
For similar heterometallic complexes, see: Chen et al. (2015); Chen et al. (2014); Gil de Muro et al. (1999); Li et al. (1989); Mege-Revil & Price (2013); Zasurskaya et al. (2000, 2001, 2006); Zhang (1993); Zhang et al. (1992).
A mixture of pyridine-2,4-dicarboxylic acid (0.0337 g, 0.2 mmol), Sr(OH)2·8 H2O (0.0262 g, 0.1 mmol), Co(OAc)2·4H2O (0.0244 g,0.1 mmol), and H2O (2 ml) was sealed in a pyrex-bottle (8 ml) and heated to 90°C for 2 days. The tube was then cooled to room temperature, generating yellow rod crystals. Yield: 0.0225 g (37%, based on Co). Elemental analysis calc. for C14H22CoN2O16Sr: C, 27.08; H, 3.57; N, 4.51%. Found: C,27.32; H, 3.57; N, 4.53%.
detailsH atoms bonded to C atoms of the pyridine ring were positioned geometrically and refined as riding atoms, with C—H = 0.97 Å, and with Uiso(H) = 1.2 Ueq(C). The water H atoms were located from a difference Fourier map and refined with restraints of O—H = 0.86 (1) Å and Uiso(H) = 1.5 Ueq(O).
Data collection: APEX2 (Bruker, 2005); cell
SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The molecular structure of the title compound. Displacement ellipsoids are drawn at the 50% probability level. Symmetry codes: A: -x,-y + 1,-z + 1; B: -x + 1/2,-y + 1/2,-z + 1; C: x - 1/2,y + 1/2,z; G: -x,y,-z + 1/2; H: x - 1/2,1/2 - y,z - 1/2. | |
Fig. 2. The packing diagram for the title compound, viewed down the b-axis, with hydrogen bonds drawn as dashed lines. |
[CoSr(C7H3NO4)2(H2O)6]·2H2O | F(000) = 1252 |
Mr = 620.89 | Dx = 1.924 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 1892 reflections |
a = 18.628 (4) Å | θ = 2.4–25.0° |
b = 6.8742 (14) Å | µ = 3.35 mm−1 |
c = 19.101 (4) Å | T = 293 K |
β = 118.77 (3)° | Block, yellow |
V = 2144.0 (8) Å3 | 0.20 × 0.18 × 0.15 mm |
Z = 4 |
Bruker APEXII CCD diffractometer | 1892 independent reflections |
Radiation source: fine-focus sealed tube | 1776 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.023 |
φ and ω scans | θmax = 25.0°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −22→22 |
Tmin = 0.554, Tmax = 0.634 | k = −7→8 |
14907 measured reflections | l = −22→22 |
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)] = 0.020 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.055 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.032P)2 + 2.0752P] where P = (Fo2 + 2Fc2)/3 |
1892 reflections | (Δ/σ)max < 0.001 |
180 parameters | Δρmax = 0.25 e Å−3 |
0 restraints | Δρmin = −0.46 e Å−3 |
[CoSr(C7H3NO4)2(H2O)6]·2H2O | V = 2144.0 (8) Å3 |
Mr = 620.89 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 18.628 (4) Å | µ = 3.35 mm−1 |
b = 6.8742 (14) Å | T = 293 K |
c = 19.101 (4) Å | 0.20 × 0.18 × 0.15 mm |
β = 118.77 (3)° |
Bruker APEXII CCD diffractometer | 1892 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 1776 reflections with I > 2σ(I) |
Tmin = 0.554, Tmax = 0.634 | Rint = 0.023 |
14907 measured reflections |
R[F2 > 2σ(F2)] = 0.020 | 0 restraints |
wR(F2) = 0.055 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.25 e Å−3 |
1892 reflections | Δρmin = −0.46 e Å−3 |
180 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. During the refinement, the command 'omit -3 50' was used to omit the reflections above 50 degree. |
x | y | z | Uiso*/Ueq | ||
Sr1 | 0.0000 | 0.01264 (3) | 0.2500 | 0.02146 (10) | |
Co1 | 0.0000 | 0.5000 | 0.5000 | 0.01990 (11) | |
O1 | −0.00844 (7) | 0.38635 (19) | 0.39640 (7) | 0.0266 (3) | |
O2 | 0.06342 (8) | 0.3272 (2) | 0.33384 (7) | 0.0315 (3) | |
O4 | 0.42018 (7) | 0.5817 (2) | 0.60160 (7) | 0.0305 (3) | |
O3 | 0.36287 (8) | 0.4710 (2) | 0.47716 (9) | 0.0317 (3) | |
O5 | −0.03083 (9) | 0.7721 (2) | 0.44277 (9) | 0.0331 (3) | |
H5A | 0.0016 (16) | 0.826 (4) | 0.4351 (14) | 0.050* | |
H5B | −0.0549 (15) | 0.844 (4) | 0.4563 (14) | 0.050* | |
O6 | −0.11541 (10) | 0.1289 (3) | 0.28103 (10) | 0.0449 (4) | |
H6A | −0.0932 (18) | 0.204 (5) | 0.3145 (18) | 0.067* | |
H6B | −0.143 (2) | 0.067 (5) | 0.2920 (19) | 0.067* | |
O7 | 0.07800 (11) | −0.3050 (3) | 0.24138 (10) | 0.0465 (4) | |
H7A | 0.0880 (19) | −0.302 (5) | 0.2065 (18) | 0.070* | |
H7B | 0.0788 (19) | −0.423 (5) | 0.2552 (18) | 0.070* | |
N1 | 0.12275 (9) | 0.5227 (2) | 0.52456 (9) | 0.0200 (3) | |
C1 | 0.13299 (11) | 0.4627 (2) | 0.46297 (10) | 0.0186 (3) | |
C2 | 0.20789 (11) | 0.4628 (2) | 0.46526 (10) | 0.0203 (4) | |
H2 | 0.2125 | 0.4217 | 0.4212 | 0.024* | |
C3 | 0.27660 (11) | 0.5250 (2) | 0.53410 (11) | 0.0199 (4) | |
C4 | 0.26621 (10) | 0.5851 (3) | 0.59769 (10) | 0.0243 (4) | |
H4 | 0.3108 | 0.6272 | 0.6448 | 0.029* | |
C5 | 0.18875 (10) | 0.5820 (3) | 0.59040 (10) | 0.0250 (4) | |
H5 | 0.1824 | 0.6234 | 0.6335 | 0.030* | |
C6 | 0.05723 (10) | 0.3868 (2) | 0.39153 (10) | 0.0210 (4) | |
C7 | 0.35996 (11) | 0.5254 (2) | 0.53790 (11) | 0.0222 (4) | |
O8 | 0.27133 (18) | 0.4156 (6) | 0.30992 (15) | 0.1108 (11) | |
H8A | 0.239 (3) | 0.339 (8) | 0.295 (3) | 0.166* | |
H8B | 0.289 (3) | 0.430 (8) | 0.358 (3) | 0.166* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Sr1 | 0.02048 (15) | 0.02650 (15) | 0.01701 (14) | 0.000 | 0.00871 (11) | 0.000 |
Co1 | 0.01467 (19) | 0.0272 (2) | 0.01995 (19) | −0.00072 (11) | 0.01003 (15) | −0.00234 (12) |
O1 | 0.0171 (6) | 0.0390 (7) | 0.0237 (6) | −0.0033 (5) | 0.0099 (5) | −0.0083 (5) |
O2 | 0.0295 (7) | 0.0452 (8) | 0.0233 (6) | −0.0070 (6) | 0.0154 (6) | −0.0120 (6) |
O4 | 0.0171 (6) | 0.0449 (8) | 0.0262 (7) | −0.0022 (6) | 0.0079 (5) | 0.0046 (6) |
O3 | 0.0247 (7) | 0.0431 (8) | 0.0344 (8) | 0.0008 (6) | 0.0199 (6) | −0.0043 (6) |
O5 | 0.0305 (7) | 0.0300 (8) | 0.0512 (9) | 0.0033 (6) | 0.0295 (7) | 0.0058 (6) |
O6 | 0.0445 (9) | 0.0566 (11) | 0.0438 (9) | −0.0198 (7) | 0.0294 (8) | −0.0190 (8) |
O7 | 0.0529 (10) | 0.0425 (9) | 0.0410 (9) | 0.0015 (8) | 0.0201 (8) | −0.0091 (7) |
N1 | 0.0175 (8) | 0.0242 (8) | 0.0202 (8) | 0.0004 (5) | 0.0106 (6) | −0.0009 (5) |
C1 | 0.0190 (8) | 0.0183 (8) | 0.0198 (9) | 0.0007 (7) | 0.0103 (7) | 0.0015 (7) |
C2 | 0.0218 (9) | 0.0213 (8) | 0.0217 (9) | 0.0014 (7) | 0.0135 (7) | 0.0002 (7) |
C3 | 0.0181 (9) | 0.0183 (8) | 0.0247 (9) | 0.0024 (6) | 0.0115 (8) | 0.0048 (6) |
C4 | 0.0191 (8) | 0.0303 (10) | 0.0208 (8) | −0.0007 (7) | 0.0075 (7) | −0.0007 (7) |
C5 | 0.0216 (9) | 0.0353 (10) | 0.0198 (8) | 0.0000 (8) | 0.0114 (7) | −0.0052 (7) |
C6 | 0.0213 (8) | 0.0206 (9) | 0.0208 (8) | 0.0007 (7) | 0.0099 (7) | 0.0004 (6) |
C7 | 0.0184 (9) | 0.0214 (9) | 0.0278 (10) | 0.0032 (7) | 0.0119 (8) | 0.0072 (7) |
O8 | 0.0901 (19) | 0.191 (3) | 0.0507 (13) | −0.065 (2) | 0.0334 (14) | −0.0089 (17) |
Co1—O1i | 2.0619 (12) | O7—H7B | 0.85 (4) |
Co1—O1 | 2.0619 (12) | N1—C5 | 1.331 (2) |
Co1—O5 | 2.1025 (15) | N1—C1 | 1.344 (2) |
Co1—O5i | 2.1025 (15) | C1—C2 | 1.375 (3) |
Co1—N1 | 2.1072 (16) | C1—C6 | 1.507 (2) |
Co1—N1i | 2.1072 (16) | C2—C3 | 1.389 (3) |
O1—C6 | 1.271 (2) | C2—H2 | 0.9300 |
O2—C6 | 1.232 (2) | C3—C4 | 1.382 (3) |
O4—C7 | 1.255 (2) | C3—C7 | 1.519 (2) |
O3—C7 | 1.245 (2) | C4—C5 | 1.382 (2) |
O5—H5A | 0.78 (3) | C4—H4 | 0.9300 |
O5—H5B | 0.79 (3) | C5—H5 | 0.9300 |
O6—H6A | 0.77 (3) | O8—H8A | 0.75 (5) |
O6—H6B | 0.77 (3) | O8—H8B | 0.82 (6) |
O7—H7A | 0.77 (3) | ||
O1i—Co1—O1 | 180.0 | C1—N1—Co1 | 112.24 (12) |
O1i—Co1—O5 | 92.14 (6) | N1—C1—C2 | 122.78 (16) |
O1—Co1—O5 | 87.86 (6) | N1—C1—C6 | 115.66 (15) |
O1i—Co1—O5i | 87.86 (6) | C2—C1—C6 | 121.51 (15) |
O1—Co1—O5i | 92.14 (6) | C1—C2—C3 | 119.27 (16) |
O5—Co1—O5i | 180.0 | C1—C2—H2 | 120.4 |
O1i—Co1—N1 | 100.66 (6) | C3—C2—H2 | 120.4 |
O1—Co1—N1 | 79.34 (6) | C4—C3—C2 | 117.96 (16) |
O5—Co1—N1 | 92.61 (6) | C4—C3—C7 | 121.99 (16) |
O5i—Co1—N1 | 87.39 (6) | C2—C3—C7 | 120.05 (16) |
O1i—Co1—N1i | 79.34 (6) | C5—C4—C3 | 119.22 (16) |
O1—Co1—N1i | 100.66 (6) | C5—C4—H4 | 120.4 |
O5—Co1—N1i | 87.39 (6) | C3—C4—H4 | 120.4 |
O5i—Co1—N1i | 92.61 (6) | N1—C5—C4 | 123.02 (16) |
N1—Co1—N1i | 180.0 | N1—C5—H5 | 118.5 |
C6—O1—Co1 | 115.97 (11) | C4—C5—H5 | 118.5 |
Co1—O5—H5A | 118.5 (19) | O2—C6—O1 | 124.93 (16) |
Co1—O5—H5B | 116.3 (18) | O2—C6—C1 | 118.35 (15) |
H5A—O5—H5B | 112 (3) | O1—C6—C1 | 116.71 (14) |
H6A—O6—H6B | 108 (3) | O3—C7—O4 | 125.23 (17) |
H7A—O7—H7B | 109 (3) | O3—C7—C3 | 117.19 (17) |
C5—N1—C1 | 117.74 (15) | O4—C7—C3 | 117.58 (16) |
C5—N1—Co1 | 130.01 (12) | H8A—O8—H8B | 109 (5) |
O5—Co1—O1—C6 | 90.49 (13) | C7—C3—C4—C5 | 179.75 (16) |
N1—Co1—O1—C6 | −2.57 (12) | C1—N1—C5—C4 | 0.3 (3) |
O5—Co1—N1—C5 | 96.46 (16) | Co1—N1—C5—C4 | 178.77 (13) |
O1—Co1—N1—C1 | 2.35 (11) | C3—C4—C5—N1 | 0.3 (3) |
O5—Co1—N1—C1 | −84.97 (12) | Co1—O1—C6—O2 | −179.05 (14) |
C5—N1—C1—C2 | −0.8 (3) | Co1—O1—C6—C1 | 2.30 (19) |
Co1—N1—C1—C2 | −179.57 (13) | N1—C1—C6—O2 | −178.92 (16) |
C5—N1—C1—C6 | 176.84 (15) | C2—C1—C6—O2 | −1.3 (3) |
Co1—N1—C1—C6 | −1.93 (18) | N1—C1—C6—O1 | −0.2 (2) |
N1—C1—C2—C3 | 0.8 (3) | C2—C1—C6—O1 | 177.49 (16) |
C6—C1—C2—C3 | −176.73 (15) | C4—C3—C7—O3 | −179.09 (16) |
C1—C2—C3—C4 | −0.2 (2) | C2—C3—C7—O3 | 1.0 (2) |
C1—C2—C3—C7 | 179.75 (15) | C4—C3—C7—O4 | 0.4 (2) |
C2—C3—C4—C5 | −0.3 (3) | C2—C3—C7—O4 | −179.53 (16) |
Symmetry code: (i) −x, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5A···O4ii | 0.78 (3) | 2.00 (3) | 2.7672 (19) | 168 (2) |
O5—H5B···O3iii | 0.79 (3) | 1.96 (3) | 2.734 (2) | 165 (3) |
O6—H6B···O8iv | 0.77 (3) | 2.07 (4) | 2.833 (3) | 173 (3) |
O7—H7A···O5v | 0.77 (3) | 2.57 (3) | 3.233 (3) | 145 (3) |
O7—H7B···O2vi | 0.85 (4) | 2.39 (3) | 3.170 (2) | 153 (3) |
O8—H8A···O6vii | 0.75 (5) | 2.50 (5) | 3.238 (3) | 167 (5) |
O8—H8B···O3 | 0.82 (6) | 2.04 (6) | 2.831 (3) | 164 (6) |
O6—H6A···O1 | 0.77 (3) | 2.03 (3) | 2.781 (2) | 164 (3) |
Symmetry codes: (ii) −x+1/2, −y+3/2, −z+1; (iii) x−1/2, y+1/2, z; (iv) x−1/2, y−1/2, z; (v) −x, y−1, −z+1/2; (vi) x, y−1, z; (vii) −x, y, −z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O5—H5A···O4i | 0.78 (3) | 2.00 (3) | 2.7672 (19) | 168 (2) |
O5—H5B···O3ii | 0.79 (3) | 1.96 (3) | 2.734 (2) | 165 (3) |
O6—H6B···O8iii | 0.77 (3) | 2.07 (4) | 2.833 (3) | 173 (3) |
O7—H7A···O5iv | 0.77 (3) | 2.57 (3) | 3.233 (3) | 145 (3) |
O7—H7B···O2v | 0.85 (4) | 2.39 (3) | 3.170 (2) | 153 (3) |
O8—H8A···O6vi | 0.75 (5) | 2.50 (5) | 3.238 (3) | 167 (5) |
O8—H8B···O3 | 0.82 (6) | 2.04 (6) | 2.831 (3) | 164 (6) |
O6—H6A···O1 | 0.77 (3) | 2.03 (3) | 2.781 (2) | 164 (3) |
Symmetry codes: (i) −x+1/2, −y+3/2, −z+1; (ii) x−1/2, y+1/2, z; (iii) x−1/2, y−1/2, z; (iv) −x, y−1, −z+1/2; (v) x, y−1, z; (vi) −x, y, −z+1/2. |
Acknowledgements
This research was supported by Doctoral Fund Project of Huanggang Normal University (grant No. 2015001803).
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