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Acta Cryst. (2012). E68, m1464    [ doi:10.1107/S1600536812045540 ]

trans-Tetraaquabis[2-(4-chlorophenoxy)acetato-[kappa]O1]nickel(II)

J. Ashurov, M. Ziyaev, B. Ibragimov and S. Talipov

Abstract top

In the title compound, [Ni(C8H6ClO3)2(H2O)4], the NiII ion is located on a crystallographic inversion centre and is octahedrally coordinated by two 2-(4-chlorophenoxy)acetate ligands in axial positions and by four water molecules in the equatorial plane. The acetate ligands are bound to the NiII ion in a monodentate manner through a carboxylate O atom. In the crystal, O-H...O hydrogen bonds link the molecules, forming a two-dimensional supramolecular network lying parallel to the ab plane.

Comment top

The interaction of transition metal ions with biologically active molecules such as amino acids and various organic acids is very important in biological systems (Parkin, 2004; Daniele et al., 2008). 4-chlorophenoxyacetic acid is one such acid that has been used to form various complexes with transition metals (Liwporncharoenvong & Luck, 2005; Smith et al., 1980; Wang et al., 2008). We report herein on the synthesis and crystal structure of a new nickel(II) complex involving this ligand.

In the title compound the NiII ion is located on a crystallographic inversion centre (Fig. 1). The NiII ion is octahedral coordinated by two p-chlorophenoxyacetato ligands in axial positions [Ni—O = 2.060 (3) Å] and by four water molecules in the equatorial plane [Ni—O = 2.084 (3) and 2.039 (3) Å]. The p-chlorophenoxyacetato ligands are bound to the NiII ion in a monodentate manner through a carboxylate O atom.

In the crystal, molecules are linked via O-H···O hydrogen bonds (Table 1), resulting in the formation of a complex two-dimensional supramolecular network lying parallel to the ab plane (Fig. 2).

Related literature top

For interactions of metal ions with amino acids, see: Daniele et al. (2008); Parkin (2004). For the crystal structures of related 4-chlorophenoxyacetate complexes, see: Liwporncharoenvong & Luck (2005); Smith et al. (1980); Wang et al. (2008).

Experimental top

A solution of 4-chlorophenoxyacetic acid (40 mg, 0.2 mmol) in ethanol (3 ml) was added to a solution of Ni(CH3OO)2 [15.96 mg 0.1 mmol] in water (1.5 ml) and stirred for 10 min at 303 K. Slow evaporation of the resulting solution gave green block-like crystals of the title compound suitable for X-ray analysis.

Refinement top

All the H atoms were included in calculated positions and treated as riding: C—H = 0.97 Å (methylene), 0.93 Å (aromatic) and O—H = 0.86 Å, with Uiso(H) = k × Ueq(parent atom), where k = 1.5 for water H atoms and = 1.2 for other H atoms. In the final difference Fourier map the highest residual density peak is located near the metal atom.

Computing details top

Data collection: CrysAlis PRO (Oxford Diffraction, 2009); cell refinement: CrysAlis PRO (Oxford Diffraction, 2009); data reduction: CrysAlis PRO (Oxford Diffraction, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound with the atom-labeling scheme. Displacement ellipsoids are drawn at the 30% probability level [symmetry code: (a) -x+2, -y+1, -z+1].
[Figure 2] Fig. 2. A view along the a axis of the crystal packing of title compound. Hydrogen bonds are shown as dashed lines - see Table 1 for details.
trans-Tetraaquabis[2-(4-chlorophenoxy)acetato-κO1]nickel(II) top
Crystal data top
[Ni(C8H6ClO3)2(H2O)4]V = 510.8 (5) Å3
Mr = 501.93Z = 1
Triclinic, P1F(000) = 258
Hall symbol: -P 1Dx = 1.632 Mg m−3
a = 4.894 (3) ÅCu Kα radiation, λ = 1.54184 Å
b = 5.769 (4) ŵ = 4.25 mm−1
c = 18.369 (9) ÅT = 293 K
α = 97.226 (3)°Block, green
β = 90.088 (4)°0.45 × 0.22 × 0.2 mm
γ = 96.796 (4)°
Data collection top
Oxford Diffraction Xcalibur Ruby
diffractometer		2059 independent reflections
Radiation source: fine-focus sealed tube1759 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.052
Detector resolution: 10.2576 pixels mm-1θmax = 75.9°, θmin = 4.9°
ω scansh = −5→6
Absorption correction: multi-scan
(CrysAlis PRO; Oxford Diffraction, 2009)		k = −7→6
Tmin = 0.226, Tmax = 1.000l = −19→23
4607 measured reflections
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)] = 0.099Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.272H-atom parameters constrained
S = 1.13 w = 1/[σ2(Fo2) + (0.2P)2]
where P = (Fo2 + 2Fc2)/3
2059 reflections(Δ/σ)max = 0.002
135 parametersΔρmax = 2.78 e Å−3
0 restraintsΔρmin = −1.32 e Å−3
Crystal data top
[Ni(C8H6ClO3)2(H2O)4]γ = 96.796 (4)°
Mr = 501.93V = 510.8 (5) Å3
Triclinic, P1Z = 1
a = 4.894 (3) ÅCu Kα radiation
b = 5.769 (4) ŵ = 4.25 mm−1
c = 18.369 (9) ÅT = 293 K
α = 97.226 (3)°0.45 × 0.22 × 0.2 mm
β = 90.088 (4)°
Data collection top
Oxford Diffraction Xcalibur Ruby
diffractometer		2059 independent reflections
Absorption correction: multi-scan
(CrysAlis PRO; Oxford Diffraction, 2009)		1759 reflections with I > 2σ(I)
Tmin = 0.226, Tmax = 1.000Rint = 0.052
4607 measured reflectionsθmax = 75.9°
Refinement top
R[F2 > 2σ(F2)] = 0.099H-atom parameters constrained
wR(F2) = 0.272Δρmax = 2.78 e Å−3
S = 1.13Δρmin = −1.32 e Å−3
2059 reflectionsAbsolute structure: ?
135 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Ni11.00000.50000.50000.0282 (4)
Cl12.2639 (4)0.3457 (4)0.04767 (9)0.0837 (7)
O2W0.7333 (6)0.2008 (5)0.50078 (16)0.0359 (7)
H2WA0.72140.11920.45770.054*
H2WB0.57060.23540.51310.054*
O11.5117 (7)0.3222 (6)0.29609 (16)0.0413 (8)
O1W1.2630 (6)0.3692 (5)0.56991 (15)0.0344 (7)
H1WA1.16890.28860.59990.052*
H1WB1.36600.48340.59510.052*
O30.9237 (6)0.0301 (5)0.37074 (15)0.0379 (7)
O21.2116 (7)0.3526 (5)0.41255 (16)0.0369 (7)
C11.6813 (9)0.3129 (8)0.2362 (2)0.0383 (10)
C71.3174 (9)0.1227 (7)0.3018 (2)0.0358 (9)
H7A1.4128−0.01220.30750.043*
H7B1.20490.08630.25740.043*
C81.1359 (8)0.1725 (6)0.36740 (19)0.0293 (8)
C21.8536 (13)0.5167 (10)0.2301 (3)0.0539 (13)
H21.84890.64720.26510.065*
C61.6845 (11)0.1169 (10)0.1845 (3)0.0491 (12)
H61.5671−0.01990.18850.059*
C51.8678 (12)0.1279 (12)0.1261 (3)0.0564 (13)
H51.8740−0.00290.09120.068*
C42.0382 (12)0.3318 (12)0.1203 (3)0.0556 (13)
C32.0336 (14)0.5284 (12)0.1721 (3)0.0621 (15)
H32.14950.66590.16800.075*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Ni10.0331 (6)0.0178 (6)0.0305 (6)−0.0016 (4)0.0044 (4)−0.0044 (4)
Cl10.0815 (12)0.1170 (16)0.0516 (9)0.0067 (10)0.0316 (8)0.0111 (9)
O2W0.0349 (15)0.0225 (14)0.0465 (16)−0.0025 (11)0.0093 (12)−0.0043 (11)
O10.0472 (18)0.0345 (16)0.0357 (15)−0.0041 (13)0.0120 (13)−0.0122 (12)
O1W0.0383 (16)0.0235 (13)0.0385 (14)−0.0042 (11)−0.0019 (11)−0.0007 (10)
O30.0471 (18)0.0272 (15)0.0356 (14)−0.0039 (12)0.0041 (12)−0.0025 (11)
O20.0440 (17)0.0270 (15)0.0350 (14)−0.0025 (12)0.0047 (12)−0.0085 (11)
C10.040 (2)0.041 (2)0.0317 (18)0.0007 (18)0.0084 (16)−0.0002 (16)
C70.040 (2)0.028 (2)0.0350 (19)−0.0020 (16)0.0032 (16)−0.0069 (15)
C80.035 (2)0.0217 (18)0.0299 (17)0.0043 (14)−0.0009 (14)−0.0035 (13)
C20.067 (4)0.041 (3)0.047 (3)−0.008 (2)0.014 (2)−0.004 (2)
C60.057 (3)0.046 (3)0.039 (2)0.000 (2)0.010 (2)−0.0071 (19)
C50.058 (3)0.067 (4)0.040 (2)0.006 (3)0.011 (2)−0.010 (2)
C40.056 (3)0.068 (4)0.042 (2)0.001 (3)0.010 (2)0.008 (2)
C30.068 (4)0.060 (3)0.055 (3)−0.009 (3)0.021 (3)0.009 (3)
Geometric parameters (Å, º) top
Ni1—O2Wi2.039 (3)O2—C81.263 (5)
Ni1—O2W2.039 (3)C1—C21.380 (7)
Ni1—O22.060 (3)C1—C61.383 (7)
Ni1—O2i2.060 (3)C7—C81.516 (5)
Ni1—O1Wi2.084 (3)C7—H7A0.9700
Ni1—O1W2.084 (3)C7—H7B0.9700
Cl1—C41.737 (5)C2—C31.386 (7)
O2W—H2WA0.8668C2—H20.9300
O2W—H2WB0.8667C6—C51.403 (7)
O1—C11.379 (5)C6—H60.9300
O1—C71.419 (5)C5—C41.375 (9)
O1W—H1WA0.8641C5—H50.9300
O1W—H1WB0.8642C4—C31.388 (9)
O3—C81.252 (5)C3—H30.9300
O2Wi—Ni1—O2W180.0C2—C1—C6120.6 (4)
O2Wi—Ni1—O287.58 (12)O1—C7—C8109.7 (3)
O2W—Ni1—O292.42 (12)O1—C7—H7A109.7
O2Wi—Ni1—O2i92.42 (12)C8—C7—H7A109.7
O2W—Ni1—O2i87.58 (12)O1—C7—H7B109.7
O2—Ni1—O2i180.00 (11)C8—C7—H7B109.7
O2Wi—Ni1—O1Wi89.06 (12)H7A—C7—H7B108.2
O2W—Ni1—O1Wi90.94 (13)O3—C8—O2126.7 (4)
O2—Ni1—O1Wi91.59 (13)O3—C8—C7116.0 (3)
O2i—Ni1—O1Wi88.41 (13)O2—C8—C7117.3 (4)
O2Wi—Ni1—O1W90.95 (13)C1—C2—C3120.6 (5)
O2W—Ni1—O1W89.05 (12)C1—C2—H2119.7
O2—Ni1—O1W88.41 (13)C3—C2—H2119.7
O2i—Ni1—O1W91.59 (13)C1—C6—C5118.9 (5)
O1Wi—Ni1—O1W180.00 (12)C1—C6—H6120.6
Ni1—O2W—H2WA110.5C5—C6—H6120.6
Ni1—O2W—H2WB110.4C4—C5—C6120.1 (5)
H2WA—O2W—H2WB108.4C4—C5—H5120.0
C1—O1—C7117.3 (3)C6—C5—H5120.0
Ni1—O1W—H1WA110.3C5—C4—C3120.8 (5)
Ni1—O1W—H1WB110.4C5—C4—Cl1120.1 (5)
H1WA—O1W—H1WB108.6C3—C4—Cl1119.1 (4)
C8—O2—Ni1128.6 (3)C2—C3—C4119.0 (5)
O1—C1—C2115.3 (4)C2—C3—H3120.5
O1—C1—C6124.0 (4)C4—C3—H3120.5
Symmetry code: (i) −x+2, −y+1, −z+1.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O2W—H2WA···O30.871.932.679 (4)144
O2W—H2WB···O1Wii0.872.012.843 (4)162
O1W—H1WA···O3iii0.861.982.732 (4)145
O1W—H1WB···O1iv0.862.212.978 (4)148
O1W—H1WB···O2iv0.862.182.861 (4)135
Symmetry codes: (ii) x−1, y, z; (iii) −x+2, −y, −z+1; (iv) −x+3, −y+1, −z+1.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O2W—H2WA···O30.871.932.679 (4)144.2
O2W—H2WB···O1Wi0.872.012.843 (4)161.5
O1W—H1WA···O3ii0.861.982.732 (4)144.5
O1W—H1WB···O1iii0.862.212.978 (4)148.0
O1W—H1WB···O2iii0.862.182.861 (4)135.2
Symmetry codes: (i) x−1, y, z; (ii) −x+2, −y, −z+1; (iii) −x+3, −y+1, −z+1.
Acknowledgements top

This work was supported by a Grant for Fundamental Research from the Center of Science and Technology, Uzbekistan (No. F7-T04841)

references
References top

Daniele, P. G., Foti, C., Gianguzza, A., Prenesti, E. & Sammartano, S. (2008). Coord. Chem. Rev. 252, 1093–1107.

Liwporncharoenvong, T. & Luck, R. L. (2005). Acta Cryst. E61, m1191–m1193.

Oxford Diffraction (2009). CrysAlis PRO. Oxford Diffraction Ltd, Yarnton, England.

Parkin, G. (2004). Chem. Rev. 104, 699–767.

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Smith, G., O'Reilly, E. J. & Kennard, C. H. L. (1980). J. Chem. Soc. Dalton Trans. pp. 2462–2466.

Spek, A. L. (2009). Acta Cryst. D65, 148–155.

Wang, Z., Liu, D. S., Zhang, H. H., Huang, C. C., Cao, Y. N. & Yu, X. H. (2008). J. Coord. Chem. 61, 419–425.