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Acta Cryst. (2011). E67, m475-m476    [ doi:10.1107/S1600536811010269 ]

Triaquabis[4-(methoxycarbonyl)benzoato-[kappa]O1]zinc dihydrate

M.-D. Serb, Y. Wang, F. Dumitru and U. Englert

Abstract top

In the crystal structure of the title complex, [Zn(C9H7O4)2(H2O)3]·2H2O, the Zn atom and the apical aqua ligand are located on a crystallographic twofold axis, with the ZnII ion in a distorted square-pyramidal coordination geometry composed of five O atoms, two from the monodentate methylterephthalato group and three from water molecules. The resulting complex and the two hydrate water molecules are interconnected by O-H...O hydrogen bonds.

Comment top

The complex crystallizes in the space group C2/c, with half a molecule in the asymmetric unit. The angles are slightly distorted from regular square-pyramidal geometry and the Zn ion lies 0.3187 (3) Å above the basal plane. The fivefold coordination around the metal atom may be described as resulting from 65% of Berry pseudorotation from trigonal-bipyramidal to square pyramidal (Holmes, 1984). Selected bond distances are listed in Table 1. Packing in this solid is dominated by classical intermolecular O—H···O hydrogen bonding between the OH groups of the water molecules (donors of hydrogen bonds) and monoanions (acceptors of hydrogen bonds). All potential H donors find an acceptor in reasonable geometry for hydrogen bonding giving rise to C22(8) motifs in the a direction, C22(13) in the ac plane (Fig. 2) and C11(6) in the b direction (Fig. 3) (Etter et al., 1990; Etter, 1991). The hydrogen bond parameters are presented in Table 2. The shortest Zn···Zn separation amounts to 5.9719 (7) Å.

Related literature top

For related Zn(II) complexes with terephtalato anions as ligands, see Hawxwell et al. (2006); Li et al. (1998); Clausen et al. (2005); Sun et al. (2006); Yin et al. (2008); Carton et al. (2009). For hydrogen-bond motifs, see: Etter et al. (1990); Etter (1991). For a description of the coordination of the metal atom, see: Holmes (1984).

Experimental top

60 mg (2 mmol) Zn(NO3)2×6(H2O) and 40 mg (2 mmol) C9H7O4Na were stirred in 200 ml H2O at 50° C for 30 min. A white precipitate has formed, it has been removed by filtration. Slow evaporation of the solvent under ambient conditions gives crystals suitable for X-ray diffraction. Elemental analysis calcd (%): C 42.08, H 4.7, N 0; Found: C 41.54, H 4.94, N 0.

Refinement top

H atoms attached to oxygen were located from difference Fourier maps and treated as riding on the oxygen atoms with freely refined Uiso. H atoms attached to carbon were calculated and introduced in their idealized positions with Caryl—H 0.95 Å, Uiso(H) = 1.2Ueq(C); Cmethyl—H 0.98 Å, Uiso(H) = 1.5Ueq(C).

Computing details top

Data collection: SMART (Bruker, 2001); cell refinement: SAINT-Plus (Bruker, 1999); data reduction: SAINT-Plus (Bruker, 1999); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. : PLATON (Spek, 2009) plot with displacement ellipsoids at 50% probability; H atoms are represented by spheres of arbitrary radius. Symmetry code: i = -x + 1, y, 1/2 - z
[Figure 2] Fig. 2. : Hydrogen-bond motifs in the title compound. The apical water molecule, the methyl substituents and H atoms attached to aryl groups have been omitted for clarity.
[Figure 3] Fig. 3. : Hydrogen-bond motifs in the title compound. The highlighted hydrogen bonds extend along b direction.
Triaquabis[4-(methoxycarbonyl)benzoato-κO1]zinc(II) dihydrate top
Crystal data top
[Zn(C9H7O4)2(H2O)3]·2H2OF(000) = 1064
Mr = 513.74Dx = 1.611 Mg m−3
Monoclinic, C2/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2ycCell parameters from 2818 reflections
a = 13.7157 (15) Åθ = 3.0–30.6°
b = 5.9719 (7) ŵ = 1.23 mm−1
c = 25.874 (3) ÅT = 130 K
β = 91.551 (2)°Plate, colorless
V = 2118.5 (4) Å30.28 × 0.17 × 0.02 mm
Z = 4
Data collection top
Bruker SMART APEX CCD
diffractometer		2435 independent reflections
Radiation source: fine-focus sealed tube2269 reflections with I > 2σ(I)
graphiteRint = 0.045
ω scansθmax = 27.5°, θmin = 3.0°
Absorption correction: multi-scan
(SADABS; Bruker, 2004)		h = −17→17
Tmin = 0.725, Tmax = 0.976k = −7→7
12212 measured reflectionsl = −33→33
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)] = 0.032Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.083H-atom parameters constrained
S = 1.06 w = 1/[σ2(Fo2) + (0.0415P)2 + 1.9928P]
where P = (Fo2 + 2Fc2)/3
2435 reflections(Δ/σ)max < 0.001
152 parametersΔρmax = 0.43 e Å−3
0 restraintsΔρmin = −0.30 e Å−3
Crystal data top
[Zn(C9H7O4)2(H2O)3]·2H2OV = 2118.5 (4) Å3
Mr = 513.74Z = 4
Monoclinic, C2/cMo Kα radiation
a = 13.7157 (15) ŵ = 1.23 mm−1
b = 5.9719 (7) ÅT = 130 K
c = 25.874 (3) Å0.28 × 0.17 × 0.02 mm
β = 91.551 (2)°
Data collection top
Bruker SMART APEX CCD
diffractometer		2435 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2004)		2269 reflections with I > 2σ(I)
Tmin = 0.725, Tmax = 0.976Rint = 0.045
12212 measured reflectionsθmax = 27.5°
Refinement top
R[F2 > 2σ(F2)] = 0.032H-atom parameters constrained
wR(F2) = 0.083Δρmax = 0.43 e Å−3
S = 1.06Δρmin = −0.30 e Å−3
2435 reflectionsAbsolute structure: ?
152 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
Zn10.50000.22322 (5)0.25000.01550 (11)
O10.43857 (11)−0.1990 (2)0.16962 (5)0.0234 (3)
O20.50650 (10)0.1406 (2)0.17621 (5)0.0206 (3)
O30.30981 (11)0.0349 (3)−0.08830 (5)0.0282 (3)
O40.36264 (11)0.3853 (2)−0.07513 (5)0.0256 (3)
O50.50000.5587 (3)0.25000.0363 (6)
H500.48390.64750.22390.053 (9)*
O60.65137 (10)0.1991 (3)0.25858 (6)0.0263 (3)
H600.67800.30690.27240.041 (8)*
H610.68510.16650.23130.048 (8)*
C10.45986 (13)−0.0115 (3)0.15193 (7)0.0166 (4)
C20.42900 (12)0.0408 (3)0.09683 (6)0.0153 (4)
C30.38816 (15)−0.1255 (3)0.06540 (7)0.0207 (4)
H30.3786−0.27150.07890.025*
C40.36134 (14)−0.0791 (3)0.01444 (7)0.0207 (4)
H40.3347−0.1940−0.00710.025*
C50.44032 (15)0.2554 (3)0.07716 (8)0.0209 (4)
H50.46760.37010.09850.025*
C60.41201 (15)0.3030 (3)0.02661 (8)0.0218 (4)
H60.41890.45060.01350.026*
C70.37346 (13)0.1352 (3)−0.00510 (7)0.0158 (4)
C80.34468 (13)0.1775 (3)−0.06031 (7)0.0178 (4)
O100.77354 (10)0.0523 (3)0.18399 (5)0.0229 (3)
H1000.81650.14210.17730.060 (10)*
H1010.74570.02540.15590.051 (8)*
C100.33801 (16)0.4409 (4)−0.12870 (8)0.0288 (5)
H10A0.37620.3468−0.15170.043*
H10B0.35290.5989−0.13500.043*
H10C0.26830.4142−0.13550.043*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Zn10.02039 (17)0.01448 (17)0.01142 (16)0.000−0.00319 (11)0.000
O10.0324 (8)0.0186 (7)0.0188 (7)−0.0025 (6)−0.0073 (6)0.0041 (5)
O20.0232 (7)0.0263 (8)0.0120 (6)−0.0072 (6)−0.0019 (5)−0.0022 (5)
O30.0412 (8)0.0253 (8)0.0174 (7)−0.0040 (7)−0.0100 (6)0.0009 (6)
O40.0369 (8)0.0218 (8)0.0176 (7)−0.0032 (6)−0.0065 (6)0.0071 (6)
O50.0728 (17)0.0133 (10)0.0215 (10)0.000−0.0236 (10)0.000
O60.0220 (7)0.0342 (9)0.0229 (7)−0.0058 (6)−0.0002 (6)−0.0088 (6)
C10.0153 (8)0.0200 (10)0.0143 (8)0.0017 (7)−0.0015 (6)−0.0008 (7)
C20.0147 (8)0.0173 (9)0.0137 (8)0.0012 (7)−0.0006 (6)−0.0015 (7)
C30.0302 (10)0.0141 (9)0.0175 (9)−0.0036 (8)−0.0039 (7)0.0021 (7)
C40.0266 (10)0.0177 (10)0.0174 (9)−0.0041 (8)−0.0055 (7)−0.0015 (7)
C50.0297 (10)0.0160 (9)0.0169 (9)−0.0050 (8)−0.0041 (8)−0.0024 (7)
C60.0326 (11)0.0133 (9)0.0194 (9)−0.0033 (8)−0.0029 (8)0.0025 (7)
C70.0152 (8)0.0181 (9)0.0139 (8)0.0004 (7)−0.0008 (6)0.0005 (7)
C80.0161 (9)0.0215 (10)0.0158 (9)0.0026 (7)0.0002 (7)0.0010 (7)
O100.0238 (7)0.0285 (8)0.0160 (6)−0.0015 (6)−0.0046 (5)0.0008 (6)
C100.0326 (11)0.0325 (12)0.0209 (10)0.0001 (9)−0.0053 (8)0.0103 (9)
Geometric parameters (Å, °) top
Zn1—O21.9763 (12)C2—C31.392 (3)
Zn1—O2i1.9765 (12)C3—C41.387 (2)
Zn1—O52.003 (2)C3—H30.95
Zn1—O62.0869 (14)C4—C71.388 (3)
Zn1—O6i2.0870 (14)C4—H40.95
O1—C11.247 (2)C5—C61.384 (3)
O2—C11.268 (2)C5—H50.95
O3—C81.208 (2)C6—C71.390 (3)
O4—C81.324 (2)C6—H60.95
O4—C101.456 (2)C7—C81.493 (2)
O5—H500.88O10—H1000.82
O6—H600.82O10—H1010.83
O6—H610.88C10—H10A0.98
C1—C21.509 (2)C10—H10B0.98
C2—C51.389 (3)C10—H10C0.98
O2—Zn1—O2i151.08 (9)C2—C3—H3119.8
O2—Zn1—O5104.46 (4)C3—C4—C7119.94 (17)
O2i—Zn1—O5104.46 (4)C3—C4—H4120.0
O2—Zn1—O690.85 (5)C7—C4—H4120.0
O2i—Zn1—O687.18 (6)C6—C5—C2120.29 (17)
O5—Zn1—O693.97 (4)C6—C5—H5119.9
O2—Zn1—O6i87.17 (6)C2—C5—H5119.9
O2i—Zn1—O6i90.85 (5)C5—C6—C7120.15 (18)
O5—Zn1—O6i93.97 (4)C5—C6—H6119.9
O6—Zn1—O6i172.07 (9)C7—C6—H6119.9
C1—O2—Zn1128.49 (12)C4—C7—C6119.81 (17)
C8—O4—C10116.67 (16)C4—C7—C8118.24 (17)
Zn1—O5—H50127.0C6—C7—C8121.95 (17)
Zn1—O6—H60115.1O3—C8—O4124.12 (17)
Zn1—O6—H61118.4O3—C8—C7122.99 (18)
H60—O6—H61106.7O4—C8—C7112.89 (16)
O1—C1—O2125.53 (16)H100—O10—H101105.0
O1—C1—C2118.06 (16)O4—C10—H10A109.5
O2—C1—C2116.41 (16)O4—C10—H10B109.5
C5—C2—C3119.45 (16)H10A—C10—H10B109.5
C5—C2—C1120.40 (16)O4—C10—H10C109.5
C3—C2—C1120.15 (17)H10A—C10—H10C109.5
C4—C3—C2120.33 (18)H10B—C10—H10C109.5
C4—C3—H3119.8
Symmetry codes: (i) −x+1, y, −z+1/2.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
O5—H50···O1ii0.881.782.6522 (16)172
O6—H60···O10iii0.821.962.763 (2)170
O6—H61···O100.881.872.734 (2)166
O10—H100···O1iv0.821.942.741 (2)166
O10—H101···O3v0.831.922.7486 (19)176
Symmetry codes: (ii) x, y+1, z; (iii) −x+3/2, y+1/2, −z+1/2; (iv) x+1/2, y+1/2, z; (v) −x+1, −y, −z.
Table 1
Selected geometric parameters (Å) top
Zn1—O21.9763 (12)Zn1—O62.0869 (14)
Zn1—O2i1.9765 (12)Zn1—O6i2.0870 (14)
Zn1—O52.003 (2)
Symmetry codes: (i) −x+1, y, −z+1/2.
Table 2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
O5—H50···O1ii0.881.782.6522 (16)172
O6—H60···O10iii0.821.962.763 (2)170
O6—H61···O100.881.872.734 (2)166
O10—H100···O1iv0.821.942.741 (2)166
O10—H101···O3v0.831.922.7486 (19)176
Symmetry codes: (ii) x, y+1, z; (iii) −x+3/2, y+1/2, −z+1/2; (iv) x+1/2, y+1/2, z; (v) −x+1, −y, −z.
Acknowledgements top

The authors acknowledge financial support from the European Social Fund through POSDRU/89/1.5/S/54785 project: `Postdoctoral Program for Advanced Research in the field of nanomaterials'.

references
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