metal-organic compounds
Diaquabis(2-pyridylphosphonato N-oxide-κ2O1,O2)cobalt(II)
aDepartment of Chemistry & Materials Engineering, Changshu Institute of Technology, Changshu, 215500 Jiangsu, People's Republic of China
*Correspondence e-mail: myschem@126.com
In the title complex, [Co(C5H5NO4P)2(H2O)2], the CoII ion, which lies on a crystallographic inversion center, is coordinated by four O atoms from two bidentate 2-phosphonatopyridine N-oxide ligands and two O atoms from two water ligands in a slightly distorted octahedral environment. Molecules are interlinked by three O—H⋯O hydrogen bonds and one weak C—H⋯O interaction, forming a three-dimensional supramolecular structure.
Related literature
For new open frameworks based on metal pyridylphosphonates, see: Ayyappan et al. (2001). For two-dimensional Cu-phosphonates, see: Ma et al. (2006). For one-dimensional Cu-phosphonates containing bridging ligands, see: Ma et al. (2007). For catalytic and magnetic properties of metal phosphonates, see: Cao et al. (1992). For the layered structures of monophosphonic acids and transition metal ions, see Clearfield (1998). For a tetraaqua-Co(II)-4-hydroxypyridine-2,6-dicarboxylate structure, see: Cui et al. (2006). For weak C—H⋯O hydrogen-bonding contacts, see: Desiraju & Steiner (2001). For the synthesis of the ligand (2-pyridyl-N-oxide)phosphonic acid, see: McCabe et al. (1987).
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/PC (Sheldrick, 2008); software used to prepare material for publication: SHELXTL/PC and PLATON (Spek, 2003).
Supporting information
10.1107/S1600536808037185/si2126sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808037185/si2126Isup2.hkl
The synthesis of the ligand (2-pyridyl-N-oxide)phosphonic acid, see: McCabe et al. (1987). The (2-pyridyl-N-oxide)phosphonic acid (0.0176 g, 0.1 mmol) was dissolved in distilled water (5 ml), and was added a solution of Co(NO3)2.6H2O (0.0240 g, 0.01 mmol) in distilled water (2 ml). The mixture was stirred at room temperature for 5 h and then filtered. Slow evaporation of the solvent gave pink crystals. (Yield 45%).
Carbon-bound H atoms were positioned geometrically (C—H = 0.93 Å), and were included in the
in the riding mode approximation, with Uiso(H) = 1.2Ueq(C). The water H atoms and P—O—H H atom were located in a difference Fourier map and restrained to 0.77 (4) Å and 0.85 (4) Å, respectively, with Uiso(H) refined between 1.0 and 1.8Ueq(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/PC (Sheldrick, 2008); software used to prepare material for publication: SHELXTL/PC (Sheldrick, 2008) and PLATON (Spek, 2003).[Co(C5H5NO4P)2(H2O)2] | F(000) = 450 |
Mr = 443.10 | Dx = 1.822 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 6955 reflections |
a = 4.7899 (10) Å | θ = 3.4–27.7° |
b = 12.075 (2) Å | µ = 1.32 mm−1 |
c = 14.162 (3) Å | T = 293 K |
β = 99.51 (3)° | Needle, pink |
V = 807.8 (3) Å3 | 0.5 × 0.3 × 0.2 mm |
Z = 2 |
Rigaku MACHINE? diffractometer | 1848 independent reflections |
Radiation source: fine-focus sealed tube | 1373 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.083 |
Detector resolution: 13.6612 pixels mm-1 | θmax = 27.5°, θmin = 3.4° |
dtfind.ref scans | h = −6→6 |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | k = −15→15 |
Tmin = 0.625, Tmax = 0.766 | l = −18→18 |
8068 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)] = 0.051 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.109 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0457P)2 + 0.1404P] where P = (Fo2 + 2Fc2)/3 |
1848 reflections | (Δ/σ)max < 0.001 |
127 parameters | Δρmax = 0.39 e Å−3 |
0 restraints | Δρmin = −0.45 e Å−3 |
[Co(C5H5NO4P)2(H2O)2] | V = 807.8 (3) Å3 |
Mr = 443.10 | Z = 2 |
Monoclinic, P21/n | Mo Kα radiation |
a = 4.7899 (10) Å | µ = 1.32 mm−1 |
b = 12.075 (2) Å | T = 293 K |
c = 14.162 (3) Å | 0.5 × 0.3 × 0.2 mm |
β = 99.51 (3)° |
Rigaku MACHINE? diffractometer | 1848 independent reflections |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | 1373 reflections with I > 2σ(I) |
Tmin = 0.625, Tmax = 0.766 | Rint = 0.083 |
8068 measured reflections |
R[F2 > 2σ(F2)] = 0.051 | 0 restraints |
wR(F2) = 0.109 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | Δρmax = 0.39 e Å−3 |
1848 reflections | Δρmin = −0.45 e Å−3 |
127 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 | ||
Co1 | 0.0000 | 0.0000 | 0.5000 | 0.0251 (2) | |
P1 | 0.06589 (18) | 0.23457 (7) | 0.41631 (6) | 0.0247 (2) | |
O1 | 0.2057 (5) | 0.14984 (17) | 0.48661 (15) | 0.0265 (5) | |
O2 | −0.1949 (5) | 0.2903 (2) | 0.43729 (17) | 0.0367 (6) | |
O3 | 0.2811 (5) | 0.3247 (2) | 0.39564 (18) | 0.0328 (6) | |
H3A | 0.455 (9) | 0.307 (3) | 0.406 (3) | 0.055 (14)* | |
O4 | −0.2925 (5) | 0.0442 (2) | 0.37548 (16) | 0.0326 (6) | |
O1W | 0.2669 (6) | −0.0782 (3) | 0.4170 (2) | 0.0317 (6) | |
H1WA | 0.362 (8) | −0.043 (3) | 0.389 (3) | 0.031 (12)* | |
H1WB | 0.362 (9) | −0.120 (4) | 0.449 (3) | 0.057 (17)* | |
N1 | −0.1928 (6) | 0.0750 (2) | 0.29606 (19) | 0.0281 (7) | |
C1 | −0.0157 (7) | 0.1641 (3) | 0.3010 (2) | 0.0273 (8) | |
C2 | 0.0908 (8) | 0.1928 (3) | 0.2193 (3) | 0.0365 (9) | |
H2 | 0.2141 | 0.2525 | 0.2210 | 0.044* | |
C3 | 0.0168 (9) | 0.1342 (3) | 0.1355 (3) | 0.0450 (10) | |
H3 | 0.0910 | 0.1534 | 0.0811 | 0.054* | |
C4 | −0.1695 (9) | 0.0462 (4) | 0.1332 (3) | 0.0465 (11) | |
H4 | −0.2257 | 0.0071 | 0.0767 | 0.056* | |
C5 | −0.2703 (9) | 0.0173 (3) | 0.2146 (3) | 0.0407 (10) | |
H5 | −0.3930 | −0.0426 | 0.2138 | 0.049* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Co1 | 0.0192 (4) | 0.0303 (4) | 0.0261 (4) | −0.0024 (3) | 0.0050 (3) | 0.0041 (3) |
P1 | 0.0175 (5) | 0.0272 (5) | 0.0299 (5) | −0.0009 (4) | 0.0049 (4) | 0.0017 (4) |
O1 | 0.0208 (12) | 0.0281 (12) | 0.0301 (13) | −0.0053 (10) | 0.0031 (10) | 0.0049 (10) |
O2 | 0.0216 (14) | 0.0389 (15) | 0.0494 (16) | 0.0026 (12) | 0.0056 (12) | −0.0042 (12) |
O3 | 0.0177 (14) | 0.0330 (14) | 0.0464 (16) | −0.0028 (12) | 0.0010 (12) | 0.0074 (11) |
O4 | 0.0244 (14) | 0.0436 (15) | 0.0301 (13) | −0.0085 (11) | 0.0050 (11) | 0.0067 (11) |
O1W | 0.0271 (15) | 0.0354 (16) | 0.0339 (16) | −0.0008 (14) | 0.0084 (13) | 0.0033 (13) |
N1 | 0.0279 (16) | 0.0325 (16) | 0.0232 (15) | 0.0009 (14) | 0.0020 (12) | 0.0032 (12) |
C1 | 0.0207 (18) | 0.0320 (19) | 0.0288 (18) | 0.0021 (16) | 0.0033 (15) | 0.0034 (15) |
C2 | 0.035 (2) | 0.040 (2) | 0.037 (2) | 0.0009 (18) | 0.0113 (18) | 0.0096 (17) |
C3 | 0.056 (3) | 0.053 (3) | 0.028 (2) | 0.011 (2) | 0.0147 (19) | 0.0060 (18) |
C4 | 0.062 (3) | 0.044 (2) | 0.031 (2) | 0.010 (2) | 0.002 (2) | −0.0053 (18) |
C5 | 0.046 (3) | 0.037 (2) | 0.037 (2) | −0.0031 (19) | −0.0016 (19) | −0.0040 (17) |
Co1—O1 | 2.084 (2) | O1W—H1WA | 0.77 (4) |
Co1—O1i | 2.084 (2) | O1W—H1WB | 0.77 (4) |
Co1—O1Wi | 2.099 (3) | N1—C5 | 1.346 (4) |
Co1—O1W | 2.099 (3) | N1—C1 | 1.365 (4) |
Co1—O4 | 2.131 (2) | C1—C2 | 1.383 (5) |
Co1—O4i | 2.131 (2) | C2—C3 | 1.377 (5) |
P1—O2 | 1.491 (2) | C2—H2 | 0.9300 |
P1—O1 | 1.505 (2) | C3—C4 | 1.384 (6) |
P1—O3 | 1.560 (3) | C3—H3 | 0.9300 |
P1—C1 | 1.826 (3) | C4—C5 | 1.367 (5) |
O3—H3A | 0.85 (4) | C4—H4 | 0.9300 |
O4—N1 | 1.345 (3) | C5—H5 | 0.9300 |
O1—Co1—O1i | 180.0 | N1—O4—Co1 | 119.04 (18) |
O1—Co1—O1Wi | 90.07 (11) | Co1—O1W—H1WA | 120 (3) |
O1i—Co1—O1Wi | 89.93 (11) | Co1—O1W—H1WB | 108 (3) |
O1—Co1—O1W | 89.93 (11) | H1WA—O1W—H1WB | 108 (4) |
O1i—Co1—O1W | 90.07 (11) | O4—N1—C5 | 119.2 (3) |
O1Wi—Co1—O1W | 180.000 (1) | O4—N1—C1 | 118.6 (3) |
O1—Co1—O4 | 87.91 (9) | C5—N1—C1 | 122.2 (3) |
O1i—Co1—O4 | 92.09 (9) | N1—C1—C2 | 117.8 (3) |
O1Wi—Co1—O4 | 88.45 (10) | N1—C1—P1 | 116.9 (2) |
O1W—Co1—O4 | 91.55 (10) | C2—C1—P1 | 125.3 (3) |
O1—Co1—O4i | 92.09 (9) | C3—C2—C1 | 120.9 (4) |
O1i—Co1—O4i | 87.91 (9) | C3—C2—H2 | 119.5 |
O1Wi—Co1—O4i | 91.55 (10) | C1—C2—H2 | 119.5 |
O1W—Co1—O4i | 88.45 (10) | C2—C3—C4 | 119.2 (4) |
O4—Co1—O4i | 180.00 (9) | C2—C3—H3 | 120.4 |
O2—P1—O1 | 118.07 (14) | C4—C3—H3 | 120.4 |
O2—P1—O3 | 108.89 (15) | C5—C4—C3 | 119.5 (4) |
O1—P1—O3 | 111.28 (14) | C5—C4—H4 | 120.2 |
O2—P1—C1 | 109.02 (15) | C3—C4—H4 | 120.2 |
O1—P1—C1 | 106.32 (14) | N1—C5—C4 | 120.3 (4) |
O3—P1—C1 | 101.99 (15) | N1—C5—H5 | 119.9 |
P1—O1—Co1 | 119.01 (13) | C4—C5—H5 | 119.9 |
P1—O3—H3A | 117 (3) | ||
O2—P1—O1—Co1 | 68.83 (18) | O4—N1—C1—P1 | −0.7 (4) |
O3—P1—O1—Co1 | −164.20 (13) | C5—N1—C1—P1 | 179.3 (3) |
C1—P1—O1—Co1 | −53.93 (18) | O2—P1—C1—N1 | −68.0 (3) |
O1Wi—Co1—O1—P1 | −78.04 (16) | O1—P1—C1—N1 | 60.3 (3) |
O1W—Co1—O1—P1 | 101.96 (16) | O3—P1—C1—N1 | 176.9 (2) |
O4—Co1—O1—P1 | 10.41 (15) | O2—P1—C1—C2 | 113.0 (3) |
O4i—Co1—O1—P1 | −169.59 (15) | O1—P1—C1—C2 | −118.7 (3) |
O1—Co1—O4—N1 | 52.1 (2) | O3—P1—C1—C2 | −2.0 (3) |
O1i—Co1—O4—N1 | −127.9 (2) | N1—C1—C2—C3 | 0.9 (5) |
O1Wi—Co1—O4—N1 | 142.2 (2) | P1—C1—C2—C3 | 179.9 (3) |
O1W—Co1—O4—N1 | −37.8 (2) | C1—C2—C3—C4 | 0.8 (6) |
Co1—O4—N1—C5 | 121.0 (3) | C2—C3—C4—C5 | −1.8 (6) |
Co1—O4—N1—C1 | −59.0 (3) | O4—N1—C5—C4 | −179.3 (3) |
O4—N1—C1—C2 | 178.3 (3) | C1—N1—C5—C4 | 0.7 (5) |
C5—N1—C1—C2 | −1.7 (5) | C3—C4—C5—N1 | 1.1 (6) |
Symmetry code: (i) −x, −y, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1WB···O1ii | 0.77 (4) | 2.15 (5) | 2.803 (4) | 142 (4) |
O3—H3A···O2iii | 0.85 (4) | 1.68 (4) | 2.516 (3) | 171 (4) |
O1W—H1WA···O4iii | 0.77 (4) | 2.00 (4) | 2.719 (4) | 155 (4) |
C3—H3···O2iv | 0.93 | 2.52 | 3.449 (5) | 178 |
Symmetry codes: (ii) −x+1, −y, −z+1; (iii) x+1, y, z; (iv) x+1/2, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Co(C5H5NO4P)2(H2O)2] |
Mr | 443.10 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 4.7899 (10), 12.075 (2), 14.162 (3) |
β (°) | 99.51 (3) |
V (Å3) | 807.8 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 1.32 |
Crystal size (mm) | 0.5 × 0.3 × 0.2 |
Data collection | |
Diffractometer | Rigaku MACHINE? diffractometer |
Absorption correction | Multi-scan (CrystalClear; Rigaku, 2005) |
Tmin, Tmax | 0.625, 0.766 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8068, 1848, 1373 |
Rint | 0.083 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.109, 1.05 |
No. of reflections | 1848 |
No. of parameters | 127 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.39, −0.45 |
Computer programs: CrystalClear (Rigaku, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL/PC (Sheldrick, 2008) and PLATON (Spek, 2003).
Co1—O1 | 2.084 (2) | Co1—O4 | 2.131 (2) |
Co1—O1W | 2.099 (3) | ||
O1—Co1—O1W | 89.93 (11) | O1W—Co1—O4 | 91.55 (10) |
O1—Co1—O4 | 87.91 (9) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1WB···O1i | 0.77 (4) | 2.15 (5) | 2.803 (4) | 142 (4) |
O3—H3A···O2ii | 0.85 (4) | 1.68 (4) | 2.516 (3) | 171 (4) |
O1W—H1WA···O4ii | 0.77 (4) | 2.00 (4) | 2.719 (4) | 155 (4) |
C3—H3···O2iii | 0.93 | 2.52 | 3.449 (5) | 178 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) x+1, y, z; (iii) x+1/2, −y+1/2, z−1/2. |
Acknowledgements
This work was supported by a start-up grant from CSLG (No. KY10657).
References
Ayyappan, P., Evans, O. R., Foxman, B. M., Wheeler, K. A., Warren, T. H. & Lin, W.-B. (2001). Inorg. Chem. 40, 5954–5961. Web of Science CSD CrossRef PubMed CAS Google Scholar
Cao, G., Hong, H. & Mallouk, T. E. (1992). Acc. Chem. Res. 25, 420–427. CrossRef CAS Google Scholar
Clearfield, A. (1998). Prog. Inorg. Chem. 47, 371–510. CrossRef CAS Google Scholar
Cui, J.-Z., Zhang, H., Lin, T., Kang, H.-J. & Gao, H.-L. (2006). Acta Cryst. E62, m2499–m2501. Web of Science CSD CrossRef IUCr Journals Google Scholar
Desiraju, G. R. & Steiner, T. (2001). The Weak Hydrogen Bond in Structural Chemistry and Biology, pp. 29–121. IUCr Monograph on Crystallography, No. 9. Oxford University Press. Google Scholar
Ma, Y.-S., Song, Y., Du, W.-X., Li, Y.-Z. & Zheng, L.-M. (2006). Dalton Trans. pp. 3228–3235. Web of Science CSD CrossRef Google Scholar
Ma, Y.-S., Wang, T.-W., Li, Y.-Z. & Zheng, L.-M. (2007). Inorg. Chim. Acta, 360, 4117–4124. Web of Science CSD CrossRef CAS Google Scholar
McCabe, D. J., Russell, A. A., Karthikeyan, S., Paine, R. T., Ryan, R. R. & Smith, B. (1987). Inorg. Chem. 26, 1230–1235. CSD CrossRef CAS Web of Science Google Scholar
Rigaku (2005). CrystalClear. Rigaku Corporation, Tokyo, Japan. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2003). J. Appl. Cryst. 36, 7–13. Web of Science CrossRef CAS IUCr Journals Google Scholar
This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
The chemistry of metal phosphonates has received an increasing attention in recent years for their new architectures and properties in catalysis, ion exchange and magnetic materials (Cao et al., 1992). It has been well known that the monophosphonic acid RPO3H2, where R represents an alkyl or aryl group, prefer to form layered structures with transition metal ions (Clearfield 1998). There are some metal phosphonates reported during the past several years which contain pyridyl groups (Ayyappan et al. (2001); Ma et al. (2006); Ma et al. (2007). The present paper is concerned with the crystal structure of a new cobalt phosphonate complex with a (2-pyridyl-N-oxide)phosphonate ligand.
The asymmetric unit contains half of the [Co(C5H4NOPO3H)2(H2O)2] molecule. As shown in Fig. 1, atom Co1 lies on an inversion centre and is coordinated by four O atoms [O1, O1i, O4 and O4i] from two ligands, and two O atoms from two aqua ligands, thereby forming a slightly distorted CoO6 octahedral coordination geometry. The Co1—O1 and the Co1—O4 distances (Table 1) are close to the value observed in [CoL2(H2O)4] [2.0653 (12) Å, and the Co—O(H2O) distance in the title structure is close to the value observed in the Co-tetraaqua compound [2.0764 (13) Å with L = 4-hydroxypyridine-2,6-dicarboxylate (Cui et al., 2006)] (Table 1). The cisoid angles of CoO6 (Table 1) are close to 90°. The phosphonate serves as a chelating ligand using one pyridyl N-oxide acceptor O atom and one phosphonate oxygen atom. One phosphonate oxygen is protonated with the P1—O3 distance 1.560 (3) Å.
In the complex, three classic intermolecular O—H···O hydrogen-bonds exist between the water molecule and a phosphonate O atom, the water molecule and a pyridyl N-oxide acceptor O atom, and between two phosphonate O atoms (Fig. 1, Table 2). Thus, the molecules are interlinked by these hydrogen bonds, forming a one-dimensional chain structure along the a-axis (Fig.2). Additionally, weak intermolecular C—H···O hydrogen bonding contacts (Desiraju & Steiner, 2001) link these chains to form a three-dimensional supramolecular network (Fig. 3).