metal-organic compounds
Tetraaqua(2,2′-bipyridine-κ2N,N′)nickel(II) sulfate
aDepartment of Chemistry, Faculty of Science, Naresuan University, Muang, Phitsanulok 65000, Thailand
*Correspondence e-mail: kittipongc@nu.ac.th
The 10H8N2)(H2O)4]SO4, consists of a complex [Ni(bipy)(H2O)4]2+ cation (bipy = 2,2′-bipyridine) and a non-coordinating [SO4]2− anion. The NiII atom is six-coordinated in a distorted octahedral geometry defined by the two N atoms of the bipy ligand and four water O atoms. The contains extensive classical O—H⋯O hydrogen bonds, which link the ions into a two-dimensional array in the ab plane. Layers are connected into a three-dimensional supramolecular structure by C—H⋯O interactions.
of the title complex, [Ni(CRelated literature
For the structures and properties of coordination complexes with bipy as a ligand, see: Graaf & Sousa (2010); Baruah et al. (2007); Schubert & Eschbaumer (2002); Harvey et al. (1999); Damrauer et al. (1997); Healy et al. (1984)
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S160053681202538X/tk5105sup1.cif
contains datablocks global, I. DOI:Supporting information file. DOI: https://doi.org/10.1107/S160053681202538X/tk5105Isup2.cdx
Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681202538X/tk5105Isup3.hkl
The title compound was obtained unexpectedly in an attempt to synthesize the cyanide-bridged bimetallic silver(I)-nickel(II) coordination polymers. In a typical experiment, K[Ag(CN)2] (40.1 mg, 0.2 mmol) was dissolved in 3 ml of DMF/MeCN, and this was pipetted into one side of the H-tube. NiSO4.6H2O (52.7 mg, 0.2 mmol) and bipy (31.1 mg, 0.2 mmol) were dissolved in 3 ml of DMF/MeCN, and this was pipetted into the other side arm of the H-tube. The H-tube was then carefully filled with distilled water. Upon slow diffusion for two weeks, blue block-shaped single crystals of I were formed in the silver-containing side of the H-tube. Yield: 25.8 mg (64% based on K[Ag(CN2]).
The C-bound hydrogen atoms were placed in the geometrically idealized positions based on chemical coordinations and constrained to ride on their parent atom positions with a C–H distances of 0.93 Å and with Uiso(H) = 1.2Ueq(C) for aromatic. The water-bound hydrogen atoms were located in a difference Fourier map and refined being in their as-found positions with the O—H distance = 0.86±0.01 Å.
2,2'-Bipyridine (bipy) is well known as a bidentate chelating ligand. It is one of the most widely used ligands in coordination and supramolecular chemistry. Nowadays, numerous transition metal complexes containing the bipy ligand are known in the literature. These include the mononuclear compound contains the [M(bipy)n]2+ core (n = 1–3). Some of these complexes were found to have interesting catalytic (Schubert & Eschbaumer 2002), magnetic (Graaf & Sousa 2010) and optic (Damrauer et al., 1997) properties. Here, we report the
of title compound, I, a new member of [M(bipy)n]2+ family, which is isostructural to [Cd(bipy)(H2O)4]SO4 (Harvey et al., 1999).The
of I consists of the cationic complex [Ni(bipy)(H2O)4]2+ and an uncoordinated [SO4]2- anion as shown in Fig. 1. The NiII atom displays a distorted octahedral environment. The two bipy N atoms and two water O atoms (O3 and O4) define an equatorial plane with a maximum deviation of -0.069 (1) Å for atom N2 and with the Ni1 atom lying 0.007 (1) Å out of the plane. The O atoms (O1 and O2) of the remaining two water molecules complete the octahedron in the axial positions, Table 1. The bipy ligand in I exhibits the usual acute N···N bite distances of 2.641 (2) Å [N1···N2]. The bite angle is 79.3 (1)° for N1—Ni1—N2. These are one of the main factors accounting for the distortion from the ideal octahedral geometry (90°) of the NiII centre. The mean Ni—N (2.069 (2) Å) and Ni—O (2.068 (2) Å) bond lengths are in agreement with those reported for other bipy complexes of nickel such as [Ni(bipy)(H2O)4]SO4.2H2O (Healy et al., 1984) and [Ni(bipy)(H2O)4][C12H8O8] (Baruah et al., 2007).Fig. 2 shows the packing of I viewed along the b axis. An extensive classical O–H···O hydrogen bonds link the [Ni(bipy)(H2O)4]2+ cations to the [SO4]2- anions forming a two dimensional sheet in the ab plane, Fig. 3 and Table 2. There are also C–H···O interactions involving the ligated bipy molecules and the [SO4]2- anions, Fig. 4. The latter interactions link the two-dimensional sheets into a three-dimensional supramolecular network.
For the structures and properties of coordination complexes with bipy as a ligand, see: Graaf & Sousa (2010); Baruah et al. (2007); Schubert & Eschbaumer (2002); Harvey et al. (1999); Damrauer et al. (1997); Healy et al. (1984)
Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. The asymmetric unit of I. Displacement ellipsoids are drawn at the 50% probability level. | |
Fig. 2. A view of the packing of I along the b axis. | |
Fig. 3. Two-dimensional sheet in the ab plane where ions are linked via classical O—H···O hydrogen bonds in I. Bipy molecules are omitted for clarity. | |
Fig. 4. A view of the weak C—H···O hydrogen bond (a) in I. These serve to connect the layers into a three-dimensional architecture. |
[Ni(C10H8N2)(H2O)4]SO4 | F(000) = 1584 |
Mr = 383.02 | Dx = 1.713 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
a = 12.3035 (7) Å | µ = 1.49 mm−1 |
b = 11.6560 (7) Å | T = 298 K |
c = 20.7112 (10) Å | Block, blue |
V = 2970.2 (3) Å3 | 0.25 × 0.20 × 0.20 mm |
Z = 8 |
Bruker SMART APEX CCD area detector diffractometer | 3626 independent reflections |
Radiation source: fine-focus sealed tube | 3024 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.045 |
Detector resolution: 8 pixels mm-1 | θmax = 30.5°, θmin = 2.0° |
ω and φ scans | h = 0→17 |
Absorption correction: multi-scan (SADABS; Bruker, 2003) | k = 0→16 |
Tmin = 0.707, Tmax = 0.755 | l = 0→19 |
11218 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)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.092 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0322P)2 + 3.2213P] where P = (Fo2 + 2Fc2)/3 |
3626 reflections | (Δ/σ)max = 0.001 |
231 parameters | Δρmax = 0.58 e Å−3 |
12 restraints | Δρmin = −0.70 e Å−3 |
[Ni(C10H8N2)(H2O)4]SO4 | V = 2970.2 (3) Å3 |
Mr = 383.02 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 12.3035 (7) Å | µ = 1.49 mm−1 |
b = 11.6560 (7) Å | T = 298 K |
c = 20.7112 (10) Å | 0.25 × 0.20 × 0.20 mm |
Bruker SMART APEX CCD area detector diffractometer | 3626 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2003) | 3024 reflections with I > 2σ(I) |
Tmin = 0.707, Tmax = 0.755 | Rint = 0.045 |
11218 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 12 restraints |
wR(F2) = 0.092 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.07 | Δρmax = 0.58 e Å−3 |
3626 reflections | Δρmin = −0.70 e Å−3 |
231 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 | ||
Ni1 | 0.05162 (2) | 0.72886 (2) | 0.655841 (16) | 0.01042 (10) | |
S1 | −0.25226 (4) | 0.98567 (4) | 0.69683 (3) | 0.01034 (14) | |
O1 | −0.10901 (13) | 0.73405 (14) | 0.62681 (9) | 0.0138 (4) | |
N1 | 0.07768 (16) | 0.56644 (16) | 0.61777 (11) | 0.0128 (4) | |
C1 | 0.0689 (2) | 0.4662 (2) | 0.64883 (14) | 0.0162 (5) | |
H1 | 0.0453 | 0.4665 | 0.6915 | 0.019* | |
O2 | 0.20770 (14) | 0.72708 (14) | 0.69286 (9) | 0.0133 (4) | |
N2 | 0.09637 (16) | 0.77000 (16) | 0.56277 (11) | 0.0134 (4) | |
C2 | 0.0934 (2) | 0.3618 (2) | 0.62007 (14) | 0.0184 (6) | |
H2 | 0.0871 | 0.2937 | 0.6431 | 0.022* | |
O3 | −0.00380 (14) | 0.67614 (14) | 0.74609 (9) | 0.0150 (4) | |
C3 | 0.1271 (2) | 0.3612 (2) | 0.55698 (14) | 0.0208 (6) | |
H3 | 0.1440 | 0.2923 | 0.5366 | 0.025* | |
O4 | 0.04198 (14) | 0.89878 (14) | 0.68080 (10) | 0.0170 (4) | |
C4 | 0.1357 (2) | 0.4641 (2) | 0.52378 (14) | 0.0178 (5) | |
H4 | 0.1576 | 0.4651 | 0.4808 | 0.021* | |
O5 | −0.25137 (14) | 0.85952 (13) | 0.70127 (9) | 0.0172 (4) | |
C5 | 0.11122 (18) | 0.56556 (19) | 0.55584 (13) | 0.0128 (5) | |
O6 | −0.13912 (13) | 1.02854 (14) | 0.69611 (8) | 0.0142 (4) | |
C6 | 0.11779 (18) | 0.67945 (19) | 0.52374 (13) | 0.0133 (5) | |
O7 | −0.30835 (14) | 1.02193 (14) | 0.63785 (9) | 0.0157 (4) | |
C7 | 0.1406 (2) | 0.6931 (2) | 0.45869 (14) | 0.0185 (6) | |
H7 | 0.1578 | 0.6300 | 0.4332 | 0.022* | |
O8 | −0.30946 (13) | 1.03373 (13) | 0.75434 (8) | 0.0137 (4) | |
C8 | 0.1376 (2) | 0.8021 (2) | 0.43219 (14) | 0.0201 (6) | |
H8 | 0.1508 | 0.8130 | 0.3884 | 0.024* | |
C9 | 0.1145 (2) | 0.8947 (2) | 0.47183 (14) | 0.0214 (6) | |
H9 | 0.1122 | 0.9687 | 0.4552 | 0.026* | |
C10 | 0.0950 (2) | 0.8751 (2) | 0.53642 (14) | 0.0174 (6) | |
H10 | 0.0801 | 0.9375 | 0.5629 | 0.021* | |
H1A | −0.134 (3) | 0.6650 (17) | 0.6270 (18) | 0.048 (11)* | |
H2A | 0.233 (3) | 0.6601 (17) | 0.7021 (14) | 0.030 (9)* | |
H3A | −0.0628 (19) | 0.636 (3) | 0.7451 (17) | 0.042 (11)* | |
H4A | 0.092 (2) | 0.937 (3) | 0.7005 (15) | 0.040 (10)* | |
H1B | −0.152 (3) | 0.778 (2) | 0.6482 (16) | 0.041 (11)* | |
H2B | 0.220 (3) | 0.773 (2) | 0.7246 (14) | 0.048 (12)* | |
H3B | 0.046 (3) | 0.639 (3) | 0.766 (2) | 0.071 (15)* | |
H4B | −0.0191 (18) | 0.934 (3) | 0.6840 (17) | 0.039 (10)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ni1 | 0.00799 (13) | 0.01272 (14) | 0.0105 (3) | 0.00003 (10) | 0.00070 (11) | −0.00085 (11) |
S1 | 0.0079 (2) | 0.0117 (2) | 0.0114 (4) | 0.00052 (17) | 0.0005 (2) | −0.0002 (2) |
O1 | 0.0087 (7) | 0.0155 (7) | 0.0173 (12) | −0.0007 (6) | −0.0004 (7) | −0.0022 (7) |
N1 | 0.0111 (9) | 0.0163 (9) | 0.0109 (15) | −0.0006 (7) | −0.0008 (8) | −0.0005 (8) |
C1 | 0.0152 (11) | 0.0184 (11) | 0.0149 (18) | −0.0010 (9) | −0.0010 (9) | 0.0009 (9) |
O2 | 0.0111 (7) | 0.0148 (7) | 0.0139 (12) | 0.0004 (6) | −0.0015 (7) | −0.0002 (7) |
N2 | 0.0094 (8) | 0.0162 (9) | 0.0146 (14) | 0.0007 (7) | 0.0011 (8) | −0.0004 (8) |
C2 | 0.0163 (11) | 0.0163 (10) | 0.0227 (19) | 0.0002 (9) | −0.0029 (10) | 0.0012 (10) |
O3 | 0.0112 (8) | 0.0205 (8) | 0.0132 (12) | −0.0009 (6) | 0.0008 (7) | 0.0023 (7) |
C3 | 0.0189 (12) | 0.0195 (11) | 0.024 (2) | 0.0035 (9) | −0.0010 (10) | −0.0055 (10) |
O4 | 0.0098 (8) | 0.0171 (8) | 0.0241 (13) | 0.0013 (6) | −0.0022 (7) | −0.0062 (7) |
C4 | 0.0171 (11) | 0.0221 (11) | 0.0143 (18) | 0.0030 (9) | 0.0027 (10) | −0.0046 (10) |
O5 | 0.0198 (9) | 0.0115 (7) | 0.0204 (12) | 0.0015 (6) | 0.0071 (7) | 0.0001 (7) |
C5 | 0.0080 (9) | 0.0179 (10) | 0.0126 (17) | −0.0005 (8) | 0.0000 (9) | −0.0010 (9) |
O6 | 0.0083 (7) | 0.0191 (8) | 0.0153 (12) | −0.0020 (6) | 0.0005 (6) | −0.0008 (7) |
C6 | 0.0091 (9) | 0.0172 (10) | 0.0137 (17) | 0.0006 (8) | 0.0020 (8) | 0.0011 (9) |
O7 | 0.0159 (8) | 0.0187 (8) | 0.0125 (11) | 0.0025 (6) | −0.0041 (7) | −0.0019 (7) |
C7 | 0.0149 (11) | 0.0250 (11) | 0.0157 (19) | −0.0006 (9) | 0.0013 (10) | −0.0012 (10) |
O8 | 0.0115 (7) | 0.0159 (7) | 0.0137 (12) | −0.0003 (6) | 0.0025 (7) | −0.0005 (6) |
C8 | 0.0160 (11) | 0.0304 (13) | 0.0139 (18) | −0.0021 (10) | 0.0033 (10) | 0.0049 (11) |
C9 | 0.0161 (11) | 0.0243 (12) | 0.024 (2) | −0.0006 (9) | 0.0015 (10) | 0.0105 (11) |
C10 | 0.0154 (11) | 0.0166 (10) | 0.0201 (19) | 0.0028 (9) | 0.0053 (10) | 0.0027 (10) |
Ni1—O4 | 2.0504 (17) | C2—C3 | 1.371 (4) |
Ni1—N2 | 2.061 (2) | C2—H2 | 0.9300 |
Ni1—O1 | 2.0667 (17) | O3—H3A | 0.864 (18) |
Ni1—O2 | 2.0679 (17) | O3—H3B | 0.862 (18) |
Ni1—N1 | 2.0757 (19) | C3—C4 | 1.387 (4) |
Ni1—O3 | 2.0824 (19) | C3—H3 | 0.9300 |
S1—O7 | 1.4653 (19) | O4—H4A | 0.861 (18) |
S1—O5 | 1.4732 (16) | O4—H4B | 0.861 (18) |
S1—O6 | 1.4791 (17) | C4—C5 | 1.390 (3) |
S1—O8 | 1.4926 (18) | C4—H4 | 0.9300 |
O1—H1A | 0.862 (18) | C5—C6 | 1.487 (3) |
O1—H1B | 0.862 (18) | C6—C7 | 1.386 (4) |
N1—C1 | 1.338 (3) | C7—C8 | 1.384 (4) |
N1—C5 | 1.347 (3) | C7—H7 | 0.9300 |
C1—C2 | 1.388 (3) | C8—C9 | 1.386 (4) |
C1—H1 | 0.9300 | C8—H8 | 0.9300 |
O2—H2A | 0.862 (17) | C9—C10 | 1.378 (4) |
O2—H2B | 0.863 (18) | C9—H9 | 0.9300 |
N2—C10 | 1.341 (3) | C10—H10 | 0.9300 |
N2—C6 | 1.355 (3) | ||
O4—Ni1—N2 | 91.51 (8) | C6—N2—Ni1 | 115.37 (16) |
O4—Ni1—O1 | 89.41 (7) | C3—C2—C1 | 118.7 (2) |
N2—Ni1—O1 | 88.66 (8) | C3—C2—H2 | 120.7 |
O4—Ni1—O2 | 88.28 (7) | C1—C2—H2 | 120.7 |
N2—Ni1—O2 | 95.80 (8) | Ni1—O3—H3A | 114 (2) |
O1—Ni1—O2 | 175.03 (8) | Ni1—O3—H3B | 111 (3) |
O4—Ni1—N1 | 170.30 (8) | H3A—O3—H3B | 109 (3) |
N2—Ni1—N1 | 79.38 (8) | C2—C3—C4 | 119.4 (2) |
O1—Ni1—N1 | 93.66 (7) | C2—C3—H3 | 120.3 |
O2—Ni1—N1 | 89.32 (7) | C4—C3—H3 | 120.3 |
O4—Ni1—O3 | 92.28 (8) | Ni1—O4—H4A | 125 (2) |
N2—Ni1—O3 | 174.58 (7) | Ni1—O4—H4B | 122 (2) |
O1—Ni1—O3 | 87.52 (7) | H4A—O4—H4B | 110 (3) |
O2—Ni1—O3 | 88.18 (7) | C3—C4—C5 | 118.9 (3) |
N1—Ni1—O3 | 97.03 (8) | C3—C4—H4 | 120.6 |
O7—S1—O5 | 110.09 (10) | C5—C4—H4 | 120.6 |
O7—S1—O6 | 109.72 (10) | N1—C5—C4 | 121.9 (2) |
O5—S1—O6 | 109.32 (10) | N1—C5—C6 | 115.8 (2) |
O7—S1—O8 | 109.57 (10) | C4—C5—C6 | 122.3 (2) |
O5—S1—O8 | 109.16 (10) | N2—C6—C7 | 122.0 (2) |
O6—S1—O8 | 108.96 (10) | N2—C6—C5 | 114.7 (2) |
Ni1—O1—H1A | 108 (3) | C7—C6—C5 | 123.3 (2) |
Ni1—O1—H1B | 117 (3) | C8—C7—C6 | 119.1 (2) |
H1A—O1—H1B | 109 (3) | C8—C7—H7 | 120.5 |
C1—N1—C5 | 118.4 (2) | C6—C7—H7 | 120.5 |
C1—N1—Ni1 | 126.97 (18) | C7—C8—C9 | 119.0 (3) |
C5—N1—Ni1 | 114.57 (15) | C7—C8—H8 | 120.5 |
N1—C1—C2 | 122.8 (3) | C9—C8—H8 | 120.5 |
N1—C1—H1 | 118.6 | C10—C9—C8 | 118.8 (2) |
C2—C1—H1 | 118.6 | C10—C9—H9 | 120.6 |
Ni1—O2—H2A | 115 (2) | C8—C9—H9 | 120.6 |
Ni1—O2—H2B | 116 (3) | N2—C10—C9 | 123.0 (2) |
H2A—O2—H2B | 110 (3) | N2—C10—H10 | 118.5 |
C10—N2—C6 | 118.1 (2) | C9—C10—H10 | 118.5 |
C10—N2—Ni1 | 126.14 (18) | ||
O4—Ni1—N1—C1 | 158.1 (4) | C1—C2—C3—C4 | 0.0 (4) |
N2—Ni1—N1—C1 | 178.5 (2) | C2—C3—C4—C5 | 0.8 (4) |
O1—Ni1—N1—C1 | −93.6 (2) | C1—N1—C5—C4 | 0.5 (3) |
O2—Ni1—N1—C1 | 82.5 (2) | Ni1—N1—C5—C4 | 177.86 (18) |
O3—Ni1—N1—C1 | −5.6 (2) | C1—N1—C5—C6 | 179.2 (2) |
O4—Ni1—N1—C5 | −19.0 (6) | Ni1—N1—C5—C6 | −3.5 (2) |
N2—Ni1—N1—C5 | 1.39 (16) | C3—C4—C5—N1 | −1.1 (4) |
O1—Ni1—N1—C5 | 89.34 (16) | C3—C4—C5—C6 | −179.7 (2) |
O2—Ni1—N1—C5 | −94.63 (16) | C10—N2—C6—C7 | 1.7 (3) |
O3—Ni1—N1—C5 | 177.28 (16) | Ni1—N2—C6—C7 | 174.92 (19) |
C5—N1—C1—C2 | 0.4 (3) | C10—N2—C6—C5 | −176.5 (2) |
Ni1—N1—C1—C2 | −176.60 (18) | Ni1—N2—C6—C5 | −3.2 (3) |
O4—Ni1—N2—C10 | −9.6 (2) | N1—C5—C6—N2 | 4.5 (3) |
O1—Ni1—N2—C10 | 79.7 (2) | C4—C5—C6—N2 | −176.9 (2) |
O2—Ni1—N2—C10 | −98.1 (2) | N1—C5—C6—C7 | −173.6 (2) |
N1—Ni1—N2—C10 | 173.7 (2) | C4—C5—C6—C7 | 5.0 (4) |
O3—Ni1—N2—C10 | 124.8 (7) | N2—C6—C7—C8 | −2.4 (4) |
O4—Ni1—N2—C6 | 177.75 (17) | C5—C6—C7—C8 | 175.5 (2) |
O1—Ni1—N2—C6 | −92.87 (17) | C6—C7—C8—C9 | 1.6 (4) |
O2—Ni1—N2—C6 | 89.33 (17) | C7—C8—C9—C10 | −0.2 (4) |
N1—Ni1—N2—C6 | 1.11 (16) | C6—N2—C10—C9 | −0.1 (4) |
O3—Ni1—N2—C6 | −47.8 (8) | Ni1—N2—C10—C9 | −172.58 (19) |
N1—C1—C2—C3 | −0.7 (4) | C8—C9—C10—N2 | −0.6 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1B···O5 | 0.86 (2) | 1.90 (2) | 2.754 (2) | 173 (3) |
O1—H1A···O7i | 0.86 (2) | 1.83 (2) | 2.683 (2) | 173 (4) |
O2—H2B···O5ii | 0.86 (2) | 1.87 (2) | 2.728 (2) | 174 (3) |
O2—H2A···O8iii | 0.86 (2) | 1.97 (2) | 2.800 (2) | 162 (3) |
O3—H3B···O6iii | 0.86 (2) | 1.89 (2) | 2.736 (2) | 168 (4) |
O3—H3A···O8i | 0.86 (2) | 1.98 (2) | 2.840 (2) | 172 (3) |
O4—H4B···O6 | 0.86 (2) | 1.86 (2) | 2.712 (2) | 172 (3) |
O4—H4A···O8ii | 0.86 (2) | 1.90 (2) | 2.760 (2) | 174 (3) |
C8—H8···O6iv | 0.93 | 2.55 | 3.310 (3) | 139 |
Symmetry codes: (i) −x−1/2, y−1/2, z; (ii) x+1/2, y, −z+3/2; (iii) −x, y−1/2, −z+3/2; (iv) −x, −y+2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Ni(C10H8N2)(H2O)4]SO4 |
Mr | 383.02 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 298 |
a, b, c (Å) | 12.3035 (7), 11.6560 (7), 20.7112 (10) |
V (Å3) | 2970.2 (3) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 1.49 |
Crystal size (mm) | 0.25 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD area detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2003) |
Tmin, Tmax | 0.707, 0.755 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 11218, 3626, 3024 |
Rint | 0.045 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.092, 1.07 |
No. of reflections | 3626 |
No. of parameters | 231 |
No. of restraints | 12 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.58, −0.70 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1B···O5 | 0.862 (18) | 1.897 (19) | 2.754 (2) | 173 (3) |
O1—H1A···O7i | 0.862 (18) | 1.825 (19) | 2.683 (2) | 173 (4) |
O2—H2B···O5ii | 0.863 (18) | 1.868 (19) | 2.728 (2) | 174 (3) |
O2—H2A···O8iii | 0.862 (17) | 1.97 (2) | 2.800 (2) | 162 (3) |
O3—H3B···O6iii | 0.862 (18) | 1.89 (2) | 2.736 (2) | 168 (4) |
O3—H3A···O8i | 0.864 (18) | 1.982 (19) | 2.840 (2) | 172 (3) |
O4—H4B···O6 | 0.861 (18) | 1.857 (19) | 2.712 (2) | 172 (3) |
O4—H4A···O8ii | 0.861 (18) | 1.903 (18) | 2.760 (2) | 174 (3) |
C8—H8···O6iv | 0.93 | 2.55 | 3.310 (3) | 139 |
Symmetry codes: (i) −x−1/2, y−1/2, z; (ii) x+1/2, y, −z+3/2; (iii) −x, y−1/2, −z+3/2; (iv) −x, −y+2, −z+1. |
Acknowledgements
This work was supported financially by the Thailand Research Funds (project approval No. MRG5480189).
References
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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.
2,2'-Bipyridine (bipy) is well known as a bidentate chelating ligand. It is one of the most widely used ligands in coordination and supramolecular chemistry. Nowadays, numerous transition metal complexes containing the bipy ligand are known in the literature. These include the mononuclear compound contains the [M(bipy)n]2+ core (n = 1–3). Some of these complexes were found to have interesting catalytic (Schubert & Eschbaumer 2002), magnetic (Graaf & Sousa 2010) and optic (Damrauer et al., 1997) properties. Here, we report the crystal structure of title compound, I, a new member of [M(bipy)n]2+ family, which is isostructural to [Cd(bipy)(H2O)4]SO4 (Harvey et al., 1999).
The asymmetric unit of I consists of the cationic complex [Ni(bipy)(H2O)4]2+ and an uncoordinated [SO4]2- anion as shown in Fig. 1. The NiII atom displays a distorted octahedral environment. The two bipy N atoms and two water O atoms (O3 and O4) define an equatorial plane with a maximum deviation of -0.069 (1) Å for atom N2 and with the Ni1 atom lying 0.007 (1) Å out of the plane. The O atoms (O1 and O2) of the remaining two water molecules complete the octahedron in the axial positions, Table 1. The bipy ligand in I exhibits the usual acute N···N bite distances of 2.641 (2) Å [N1···N2]. The bite angle is 79.3 (1)° for N1—Ni1—N2. These are one of the main factors accounting for the distortion from the ideal octahedral geometry (90°) of the NiII centre. The mean Ni—N (2.069 (2) Å) and Ni—O (2.068 (2) Å) bond lengths are in agreement with those reported for other bipy complexes of nickel such as [Ni(bipy)(H2O)4]SO4.2H2O (Healy et al., 1984) and [Ni(bipy)(H2O)4][C12H8O8] (Baruah et al., 2007).
Fig. 2 shows the packing of I viewed along the b axis. An extensive classical O–H···O hydrogen bonds link the [Ni(bipy)(H2O)4]2+ cations to the [SO4]2- anions forming a two dimensional sheet in the ab plane, Fig. 3 and Table 2. There are also C–H···O interactions involving the ligated bipy molecules and the [SO4]2- anions, Fig. 4. The latter interactions link the two-dimensional sheets into a three-dimensional supramolecular network.