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Acta Cryst. (2008). E64, m1616-m1617    [ doi:10.1107/S1600536808038919 ]

catena-Poly[[[diaquabis(2-methyl-6-oxo-1,6-dihydro-3,4'-bipyridine-5-carbonitrile)copper(II)]-[mu]-sulfato] tetrahydrate]

C.-Y. Niu, A.-M. Ning, C.-L. Feng, Y.-L. Dang and C.-H. Kou

Abstract top

In the title polymer, {[Cu(SO4)(C12H9N3O)2(H2O)2]·4H2O}n, both the metal center and the sulfate anion are located on a twofold axis. The CuII ion is coordinated by two pyridyl N atoms from two symmetry-related organic ligands, two O atoms from two symmetry-related water molecules, and two O atoms from two symmetry-related sulfate anions, resulting in a distorted octahedral geometry. The sulfate anions act as [mu]2-bridges and connect metal ions, forming a one-dimensional chain along the b axis. The three-dimensional crystal structure is established through intermolecular N-H...O and O-H...O hydrogen bonds involving the organic ligands, sulfate anions, coordinated and uncoordinated water molecules, and through [pi]-[pi] interacting 2-pyridone rings, with centroid-centroid separations of ca 3.96 Å and tilt angles of ca 2.62°.

Comment top

The coordinating modes of sulfate anions can be µ2, µ3, and µ4 bridges that have been used to construct metal-organic frameworks (Carlucci, et al., 2003; Xu, et al., 2003; Niu, et al., 2008).

In the title compound, (I), the central copper ion is coordinated by two N atoms from two symmetry-related organic ligands [N1, N1i; symmetry code: (i) -x + 3/2, -y + 3/2, z], two O atoms from two symmetry-related sulfate anions (O2, O2i), and two symmetry-related water O atoms (O4, O4i), forming a slightly distorted octahedral coordination environment (Fig. 1). The trans bond angles around metal centers are in the range 174.24 (9)–176.94 (8)°, close to 180 °, and the cis bond angles are in the range 86.58 (6)–93.50 (11) °, close to the right angle (Table 1).

Sulfate anions in the title compound act as µ2-bridging ligands to connect copper ions together, forming a one-dimensional chain along b axis. The separation of two neighbouring copper atoms in one chain is about 6.85 Å. The organic molecules, 1,6-dihydro-2-methyl-6-oxo-(3,4'-bipyridine)-5-carbonitrile, act as terminal ligands, being coordinated to the copper atoms in chains only through pyridyl N atoms, with the other N and O atoms remaining uncoordinated (Fig. 2). The S1 atom of the sulfate anion is located on a special position of space group Pccn, bonding four symmetry-related oxygen atoms [O2, O2ii, O3, O3ii; symmetry code: (ii) -x + 3/2, -y + 1/2, z]

There are hydrogen bonds involving organic ligands, sulfate anions, coordinated water molecules, and solvent water molecules. All O atoms of water molecules can either act as donors or as acceptors. Uncoordinating N atoms of pyridone rings only act as donors and sulfate O atoms as acceptors. Neighbouring chains are connected together by these hydrogen bonds (Fig. 3). In addition to these intermolecular hydrogen bonds, there are weak π-π interactions between parallel pyridone rings from two neighbouring chains, with centroid to centroid distances of about 3.96 Å and dihedral angles of about 2.62°.

Related literature top

For backgorung on metal-organic frameworks using sulfate ions as bridging ligands, see: Carlucci et al. (2003); Niu et al. (2008); Xu et al. (2003).

Experimental top

A solution of CuSO4.5H2O (0.025 g, 0.1 mmol) in CH3OH (10 ml) was added to a solution of 1,6-dihydro-2-methyl-6-oxo-(3,4'-bipyridine)-5-carbonitrile (0.021 g, 0.1 mmol) in CH3OH (20 ml) under stirring. The mixture was filtered and the resulting solution allowed to evaporate slowly. About 40 days later, blue block single crystals suitable for X-ray analysis were obtained (yield: ca. 35%).

Refinement top

H atoms of water molecules were first found in a difference map and refined freely, with Uiso(H) = 1.5Ueq(carrier O). The remaining H atoms were positioned geometrically and refined using a riding model [C—H = 0.93 Å and Uiso(H) = 1.2Ueq(C) for aromatic H atoms; N—H = 0.86 Å and Uiso(H) = 1.2Ueq(N); C—H = 0.96 Å and Uiso(H) = 1.5Ueq(C) for methyl H atoms]. The final difference map had a highest peak at 0.62 Å from atom H6W and a deepest hole at 0.55 Å from atom Cu1, but were otherwise featureless.

Computing details top

Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996); program(s) used to solve structure: SHELXL97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2005); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. A view of the CuII coordination environment in the polymeric structure of (I), showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level. All H atoms and solvent water molecules are omitted for clarity. [Symmetry codes: (i) -x + 3/2, -y + 3/2, z; (ii) -x + 3/2, -y + 1/2, z].
[Figure 2] Fig. 2. A ball-stick diagram showing the one-dimensional chain. All water molecules and H atoms have been omitted for clarity.
[Figure 3] Fig. 3. A diagram showing the intermolecular hydrogen bonds indicated by dashed lines.
catena-Poly[[[diaquabis(2-methyl-6-oxo-1,6-dihydro-3,4'-bipyridine-5- carbonitrile)copper(II)]-µ-sulfato] tetrahydrate] top
Crystal data top
[Cu(SO4)(C12H9N3O)2(H2O)2]·4H2OF(000) = 1428
Mr = 690.14Dx = 1.554 Mg m−3
Orthorhombic, PccnMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ab 2acCell parameters from 3682 reflections
a = 21.672 (3) Åθ = 2.3–25.8°
b = 6.8533 (8) ŵ = 0.88 mm−1
c = 19.860 (3) ÅT = 291 K
V = 2949.8 (6) Å3Block, blue
Z = 40.32 × 0.23 × 0.22 mm
Data collection top
Siemens SMART CCD area-detector
diffractometer		2751 independent reflections
Radiation source: fine-focus sealed tube2195 reflections with I > 2σ(I)
graphiteRint = 0.034
φ and ω scansθmax = 25.5°, θmin = 2.3°
Absorption correction: multi-scan
(SADABS; Siemens, 1996)		h = −23→26
Tmin = 0.764, Tmax = 0.828k = −8→8
14282 measured reflectionsl = −24→24
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.033Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.091H-atom parameters constrained
S = 1.03 w = 1/[σ2(Fo2) + (0.0412P)2 + 2.9734P]
where P = (Fo2 + 2Fc2)/3
2751 reflections(Δ/σ)max = 0.001
201 parametersΔρmax = 0.43 e Å−3
0 restraintsΔρmin = −0.41 e Å−3
Crystal data top
[Cu(SO4)(C12H9N3O)2(H2O)2]·4H2OV = 2949.8 (6) Å3
Mr = 690.14Z = 4
Orthorhombic, PccnMo Kα radiation
a = 21.672 (3) ŵ = 0.88 mm−1
b = 6.8533 (8) ÅT = 291 K
c = 19.860 (3) Å0.32 × 0.23 × 0.22 mm
Data collection top
Siemens SMART CCD area-detector
diffractometer		2751 independent reflections
Absorption correction: multi-scan
(SADABS; Siemens, 1996)		2195 reflections with I > 2σ(I)
Tmin = 0.764, Tmax = 0.828Rint = 0.034
14282 measured reflectionsθmax = 25.5°
Refinement top
R[F2 > 2σ(F2)] = 0.033H-atom parameters constrained
wR(F2) = 0.091Δρmax = 0.43 e Å−3
S = 1.03Δρmin = −0.41 e Å−3
2751 reflectionsAbsolute structure: ?
201 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Cu10.75000.75000.559997 (19)0.02153 (13)
S10.75000.25000.60744 (4)0.02089 (19)
O10.39746 (9)0.8422 (3)0.20721 (9)0.0447 (5)
O20.73015 (9)0.4141 (3)0.56593 (9)0.0336 (4)
O30.69854 (8)0.1865 (3)0.65199 (9)0.0321 (4)
O40.68578 (8)0.7952 (2)0.63128 (9)0.0291 (4)
H1W0.68860.90770.64530.044*
H2W0.69250.71250.66010.044*
O50.69067 (10)0.5382 (3)0.73479 (10)0.0464 (5)
H3W0.71710.53270.76540.070*
H4W0.68880.43320.71390.070*
O60.78398 (17)0.0151 (9)0.32780 (19)0.183 (3)
H5W0.77130.13160.33290.275*
H6W0.81450.01560.30230.275*
N10.68294 (9)0.7831 (3)0.49032 (10)0.0250 (5)
N20.42947 (9)0.8330 (3)0.31661 (10)0.0282 (5)
H2D0.39150.83170.32920.034*
N30.52884 (13)0.8349 (4)0.10367 (12)0.0514 (7)
C10.67866 (13)0.9364 (4)0.44882 (13)0.0357 (7)
H10.70901.03230.45090.043*
C20.63105 (12)0.9583 (4)0.40299 (14)0.0371 (7)
H20.63001.06650.37470.044*
C30.58505 (11)0.8190 (4)0.39931 (12)0.0268 (5)
C40.58919 (13)0.6623 (4)0.44327 (14)0.0392 (7)
H4A0.55900.56590.44300.047*
C50.63819 (12)0.6500 (4)0.48731 (14)0.0374 (7)
H50.64010.54370.51630.045*
C60.53443 (11)0.8312 (4)0.34882 (12)0.0260 (5)
C70.54932 (11)0.8372 (4)0.27966 (12)0.0265 (5)
H70.59060.84070.26700.032*
C80.50482 (11)0.8381 (4)0.23072 (11)0.0269 (5)
C90.44027 (11)0.8380 (4)0.24792 (12)0.0280 (6)
C100.47276 (11)0.8298 (4)0.36634 (12)0.0270 (5)
C110.44750 (13)0.8324 (5)0.43639 (13)0.0405 (7)
H11A0.42370.94900.44300.061*
H11B0.48090.82950.46810.061*
H11C0.42160.72040.44310.061*
C120.51933 (12)0.8364 (4)0.16012 (13)0.0318 (6)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Cu10.0154 (2)0.0276 (2)0.0216 (2)−0.00008 (18)0.0000.000
S10.0153 (4)0.0200 (4)0.0273 (4)0.0008 (4)0.0000.000
O10.0265 (10)0.0688 (15)0.0387 (10)0.0036 (10)−0.0118 (9)−0.0038 (10)
O20.0356 (10)0.0244 (10)0.0408 (10)−0.0002 (8)−0.0124 (8)0.0060 (8)
O30.0225 (9)0.0322 (10)0.0417 (10)−0.0012 (8)0.0090 (8)−0.0015 (8)
O40.0268 (10)0.0271 (9)0.0335 (9)−0.0005 (7)0.0046 (8)0.0011 (7)
O50.0499 (13)0.0423 (12)0.0469 (12)0.0064 (10)0.0111 (10)−0.0005 (9)
O60.073 (2)0.360 (8)0.116 (3)−0.085 (4)−0.016 (2)0.094 (4)
N10.0171 (10)0.0333 (12)0.0245 (10)−0.0016 (9)−0.0005 (8)0.0027 (9)
N20.0143 (10)0.0381 (12)0.0323 (11)0.0005 (10)0.0005 (8)−0.0017 (10)
N30.0542 (17)0.0684 (19)0.0316 (14)0.0124 (15)0.0024 (12)0.0037 (13)
C10.0284 (15)0.0395 (16)0.0393 (15)−0.0127 (13)−0.0094 (12)0.0105 (12)
C20.0317 (15)0.0414 (16)0.0382 (15)−0.0090 (13)−0.0098 (12)0.0167 (12)
C30.0186 (12)0.0360 (14)0.0260 (12)0.0003 (11)−0.0011 (10)0.0009 (11)
C40.0291 (15)0.0370 (15)0.0516 (17)−0.0134 (13)−0.0144 (13)0.0133 (14)
C50.0294 (15)0.0379 (16)0.0451 (15)−0.0084 (13)−0.0117 (12)0.0156 (13)
C60.0208 (13)0.0299 (13)0.0274 (12)−0.0020 (11)−0.0042 (10)0.0029 (11)
C70.0172 (12)0.0298 (13)0.0325 (13)0.0002 (11)−0.0013 (10)0.0044 (11)
C80.0252 (13)0.0289 (13)0.0265 (12)0.0016 (11)0.0000 (10)0.0018 (10)
C90.0229 (13)0.0302 (14)0.0309 (13)0.0004 (11)−0.0040 (11)−0.0013 (11)
C100.0220 (13)0.0307 (13)0.0284 (12)−0.0008 (11)−0.0019 (10)0.0005 (11)
C110.0299 (15)0.0608 (19)0.0309 (14)−0.0027 (15)0.0027 (11)−0.0016 (14)
C120.0278 (14)0.0343 (15)0.0333 (15)0.0037 (12)−0.0023 (11)0.0031 (12)
Geometric parameters (Å, °) top
Cu1—O4i2.0093 (17)N2—H2D0.8600
Cu1—O42.0093 (17)N3—C121.140 (3)
Cu1—N12.0197 (19)C1—C21.384 (4)
Cu1—N1i2.0197 (19)C1—H10.9300
Cu1—O22.3450 (18)C2—C31.382 (4)
Cu1—O2i2.3450 (18)C2—H20.9300
S1—O21.4592 (17)C3—C41.387 (4)
S1—O2ii1.4592 (17)C3—C61.489 (3)
S1—O3ii1.4885 (17)C4—C51.378 (4)
S1—O31.4885 (17)C4—H4A0.9300
O1—C91.231 (3)C5—H50.9300
O4—H1W0.8217C6—C101.381 (3)
O4—H2W0.8188C6—C71.412 (3)
O5—H3W0.8349C7—C81.369 (3)
O5—H4W0.8320C7—H70.9300
O6—H5W0.8509C8—C121.437 (4)
O6—H6W0.8326C8—C91.440 (3)
N1—C51.333 (3)C10—C111.495 (3)
N1—C11.339 (3)C11—H11A0.9600
N2—C101.363 (3)C11—H11B0.9600
N2—C91.385 (3)C11—H11C0.9600
O4i—Cu1—O490.42 (10)C2—C1—H1118.6
O4i—Cu1—N1176.94 (7)C3—C2—C1119.9 (2)
O4—Cu1—N188.10 (8)C3—C2—H2120.1
O4i—Cu1—N1i88.10 (8)C1—C2—H2120.1
O4—Cu1—N1i176.94 (8)C2—C3—C4117.0 (2)
N1—Cu1—N1i93.50 (11)C2—C3—C6121.9 (2)
O4i—Cu1—O286.57 (6)C4—C3—C6121.0 (2)
O4—Cu1—O289.37 (7)C5—C4—C3119.8 (3)
N1—Cu1—O290.73 (7)C5—C4—H4A120.1
N1i—Cu1—O293.21 (8)C3—C4—H4A120.1
O4i—Cu1—O2i89.37 (7)N1—C5—C4123.2 (2)
O4—Cu1—O2i86.58 (6)N1—C5—H5118.4
N1—Cu1—O2i93.21 (8)C4—C5—H5118.4
N1i—Cu1—O2i90.73 (7)C10—C6—C7117.8 (2)
O2—Cu1—O2i174.24 (9)C10—C6—C3122.9 (2)
O2—S1—O2ii111.21 (15)C7—C6—C3119.2 (2)
O2—S1—O3ii109.36 (10)C8—C7—C6122.0 (2)
O2ii—S1—O3ii109.88 (10)C8—C7—H7119.0
O2—S1—O3109.88 (10)C6—C7—H7119.0
O2ii—S1—O3109.37 (10)C7—C8—C12122.6 (2)
O3ii—S1—O3107.06 (15)C7—C8—C9121.1 (2)
S1—O2—Cu1136.96 (10)C12—C8—C9116.4 (2)
Cu1—O4—H1W109.4O1—C9—N2121.3 (2)
Cu1—O4—H2W105.3O1—C9—C8125.2 (2)
H1W—O4—H2W113.6N2—C9—C8113.5 (2)
H3W—O5—H4W110.9N2—C10—C6118.9 (2)
H5W—O6—H6W108.9N2—C10—C11115.0 (2)
C5—N1—C1117.3 (2)C6—C10—C11126.1 (2)
C5—N1—Cu1118.51 (17)C10—C11—H11A109.5
C1—N1—Cu1124.06 (17)C10—C11—H11B109.5
C10—N2—C9126.7 (2)H11A—C11—H11B109.5
C10—N2—H2D116.6C10—C11—H11C109.5
C9—N2—H2D116.6H11A—C11—H11C109.5
N1—C1—C2122.8 (2)H11B—C11—H11C109.5
N1—C1—H1118.6N3—C12—C8177.8 (3)
O2ii—S1—O2—Cu1−130.08 (19)Cu1—N1—C5—C4177.7 (2)
O3ii—S1—O2—Cu1−8.6 (2)C3—C4—C5—N10.1 (5)
O3—S1—O2—Cu1108.69 (16)C2—C3—C6—C10−124.4 (3)
O4i—Cu1—O2—S16.07 (17)C4—C3—C6—C1058.0 (4)
O4—Cu1—O2—S1−84.39 (17)C2—C3—C6—C758.1 (4)
N1—Cu1—O2—S1−172.48 (17)C4—C3—C6—C7−119.5 (3)
N1i—Cu1—O2—S193.97 (17)C10—C6—C7—C8−1.2 (4)
O4—Cu1—N1—C5−66.4 (2)C3—C6—C7—C8176.5 (3)
N1i—Cu1—N1—C5116.2 (2)C6—C7—C8—C12−177.5 (2)
O2—Cu1—N1—C522.9 (2)C6—C7—C8—C91.6 (4)
O2i—Cu1—N1—C5−152.9 (2)C10—N2—C9—O1−179.4 (3)
O4—Cu1—N1—C1110.0 (2)C10—N2—C9—C80.5 (4)
N1i—Cu1—N1—C1−67.4 (2)C7—C8—C9—O1178.7 (3)
O2—Cu1—N1—C1−160.6 (2)C12—C8—C9—O1−2.2 (4)
O2i—Cu1—N1—C123.5 (2)C7—C8—C9—N2−1.2 (4)
C5—N1—C1—C2−1.4 (4)C12—C8—C9—N2177.9 (2)
Cu1—N1—C1—C2−177.9 (2)C9—N2—C10—C6−0.2 (4)
N1—C1—C2—C30.6 (5)C9—N2—C10—C11177.7 (3)
C1—C2—C3—C40.5 (4)C7—C6—C10—N20.4 (4)
C1—C2—C3—C6−177.2 (3)C3—C6—C10—N2−177.2 (2)
C2—C3—C4—C5−0.8 (4)C7—C6—C10—C11−177.2 (3)
C6—C3—C4—C5176.9 (3)C3—C6—C10—C115.2 (5)
C1—N1—C5—C41.0 (4)
Symmetry codes: (i) −x+3/2, −y+3/2, z; (ii) −x+3/2, −y+1/2, z.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2D···O3iii0.861.992.847 (3)173
O4—H2W···O50.821.902.709 (3)167
O5—H4W···O30.832.102.922 (3)170
O4—H1W···O3iv0.821.932.727 (2)164
O5—H3W···O6v0.831.942.763 (4)171
O6—H6W···O1vi0.832.052.737 (4)139
Symmetry codes: (iii) −x+1, −y+1, −z+1; (iv) x, y+1, z; (v) x, −y+1/2, z+1/2; (vi) x+1/2, −y+1, −z+1/2.
Table 1
Selected geometric parameters (Å, °) top
Cu1—O4i2.0093 (17)Cu1—N1i2.0197 (19)
Cu1—O42.0093 (17)Cu1—O22.3450 (18)
Cu1—N12.0197 (19)Cu1—O2i2.3450 (18)
O4i—Cu1—O490.42 (10)N1—Cu1—O290.73 (7)
O4i—Cu1—N1176.94 (7)N1i—Cu1—O293.21 (8)
O4—Cu1—N188.10 (8)O4i—Cu1—O2i89.37 (7)
O4i—Cu1—N1i88.10 (8)O4—Cu1—O2i86.58 (6)
O4—Cu1—N1i176.94 (8)N1—Cu1—O2i93.21 (8)
N1—Cu1—N1i93.50 (11)N1i—Cu1—O2i90.73 (7)
O4i—Cu1—O286.57 (6)O2—Cu1—O2i174.24 (9)
O4—Cu1—O289.37 (7)
Symmetry codes: (i) −x+3/2, −y+3/2, z.
Table 2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2D···O3ii0.861.992.847 (3)173
O4—H2W···O50.821.902.709 (3)167
O5—H4W···O30.832.102.922 (3)170
O4—H1W···O3iii0.821.932.727 (2)164
O5—H3W···O6iv0.831.942.763 (4)171
O6—H6W···O1v0.832.052.737 (4)139
Symmetry codes: (ii) −x+1, −y+1, −z+1; (iii) x, y+1, z; (iv) x, −y+1/2, z+1/2; (v) x+1/2, −y+1, −z+1/2.
Acknowledgements top

We gratefully acknowledge financial support from the Natural Science Foundation of Henan Province (2008B150008) and the Science and Technology Key Task of Henan Province (0624040011).

references
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