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Acta Cryst. (2008). E64, m825-m826    [ doi:10.1107/S1600536808014311 ]

Dichlorido{2-[2-(piperidin-1-yl)ethyliminomethyl]phenolato}zinc(II) monohydrate

D.-F. Zhang, M.-H. Zhou and C.-J. Yuan

Abstract top

In the title mononuclear zinc(II) complex, [ZnCl2(C14H20N2O)]·H2O, the ZnII atom is four-coordinated by the phenolate O and imine N atoms of the Schiff base ligand and by two Cl atoms in a tetrahedral geometry. In the crystal structure, O-H...Cl, O-H...O and N-H...O hydrogen bonds involving the water molecules bridge adjacent complexes into a ladder-like structure running along the c axis.

Comment top

Zinc(II) complexes with Schiff base ligands have received much attention in recent years (Tomat et al., 2007; Kawamoto et al., 2008). Some of the complexes have been found to have biological properties (Osowole et al., 2005; Iqbal et al., 2005; Raman & Thangaraja, 2005; Abd-Elzaher, 2004). In this paper, the crystal structure of the title new zinc(II) complex with the Schiff base ligand 2-[(2-piperidin-1-ylethylimino)methyl]phenol is reported.

The title compound consists of a mononuclear Schiff base zinc(II) complex molecule and a water of hydration (Fig. 1). The ZnII atom in the complex is four-coordinate in a tetrahedral geometry with one phenolate O and one imine N atoms of the Schiff base ligand, and with two Cl atoms. Bond lengths and angles (Table 1) about the ZnII centre are comparable with the values observed in other Schiff base zinc(II) complexes (Wang, 2007; Ali et al., 2008; Li, 2007; Tatar et al., 2002). The crystal structure is stabilized by intermolecular O–H···Cl, O–H···O and N—H···O hydrogen bonds (Table 2 and Fig. 2).

Related literature top

For general background on Schiff base complexes, see: Kawamoto et al. (2008); Tomat et al. (2007). For biological properties of Schiff base compounds, see: Abd-Elzaher (2004); Iqbal et al. (2005); Osowole et al. (2005); Raman & Thangaraja (2005). For related structures, see: Ali et al. (2008); Li (2007); Tatar et al. (2002); Wang (2007).

Experimental top

A mixture of salicylaldehyde (0.1 mmol, 12.2 mg), 2-piperidin-1-ylethylamine (0.1 mmol, 12.8 mg) and ZnCl2 (0.1 mmol, 13.6 mg) in methanol was stirred for 30 min at room temperature to give a yellow solution. After keeping the solution in air for 12 d, yellow block-shaped crystals were formed.

Refinement top

Atoms H2A, H2B and H2C were located from a difference Fourier map and refined isotropically, with O-H, N-H, and H···H distances restrained to 0.85 (1), 0.90 (1), and 1.37 (2) Å, respectively. The remaining H atoms were placed in calculated positions and constrained to ride on their parent atoms, with C-H = 0.93 or 0.97 Å and Uiso(H) = 1.2Ueq(C).

Computing details top

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound, showing 30% probability displacement ellipsoids.
[Figure 2] Fig. 2. Crystal packing of the title compound. Intermolecular hydrogen bonds are shown as dashed lines. H atoms not involved in the interactions have been omitted for clarity.
Dichlorido{2-[2-(piperidin-1-yl)ethyliminomethyl]phenolato}zinc(II) monohydrate top
Crystal data top
[ZnCl2(C14H20N2O)]·H2OF000 = 800
Mr = 386.61Dx = 1.504 Mg m−3
Monoclinic, P21/cMo Kα radiation
λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 2461 reflections
a = 9.1860 (18) Åθ = 2.4–25.0º
b = 19.875 (4) ŵ = 1.76 mm−1
c = 9.966 (2) ÅT = 298 (2) K
β = 110.20 (3)ºBlock, yellow
V = 1707.6 (7) Å30.20 × 0.18 × 0.17 mm
Z = 4
Data collection top
Bruker SMART CCD area-detector
diffractometer		3882 independent reflections
Radiation source: fine-focus sealed tube2685 reflections with I > 2σ(I)
Monochromator: graphiteRint = 0.056
T = 298(2) Kθmax = 27.5º
ω scansθmin = 2.1º
Absorption correction: multi-scan
(SADABS; Bruker, 2000)		h = −11→11
Tmin = 0.720, Tmax = 0.755k = −25→25
14151 measured reflectionsl = −12→12
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.045H atoms treated by a mixture of
independent and constrained refinement
wR(F2) = 0.104  w = 1/[σ2(Fo2) + (0.0472P)2]
where P = (Fo2 + 2Fc2)/3
S = 0.97(Δ/σ)max = 0.001
3882 reflectionsΔρmax = 0.49 e Å−3
199 parametersΔρmin = −0.58 e Å−3
4 restraintsExtinction correction: none
Primary atom site location: structure-invariant direct methods
Crystal data top
[ZnCl2(C14H20N2O)]·H2OV = 1707.6 (7) Å3
Mr = 386.61Z = 4
Monoclinic, P21/cMo Kα
a = 9.1860 (18) ŵ = 1.76 mm−1
b = 19.875 (4) ÅT = 298 (2) K
c = 9.966 (2) Å0.20 × 0.18 × 0.17 mm
β = 110.20 (3)º
Data collection top
Bruker SMART CCD area-detector
diffractometer		3882 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2000)		2685 reflections with I > 2σ(I)
Tmin = 0.720, Tmax = 0.755Rint = 0.056
14151 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0454 restraints
wR(F2) = 0.104H atoms treated by a mixture of
independent and constrained refinement
S = 0.97Δρmax = 0.49 e Å−3
3882 reflectionsΔρmin = −0.58 e Å−3
199 parameters
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
Zn10.30417 (4)0.444609 (17)0.67776 (4)0.03531 (13)
Cl10.53819 (11)0.40618 (5)0.68728 (10)0.0547 (3)
Cl20.13426 (12)0.36691 (5)0.68208 (10)0.0566 (3)
O10.3309 (3)0.51454 (10)0.8185 (2)0.0466 (6)
O20.2673 (3)0.48851 (13)0.0627 (3)0.0540 (7)
N10.2172 (3)0.50529 (13)0.5054 (2)0.0330 (6)
N20.1661 (3)0.38887 (13)0.1946 (3)0.0322 (6)
C60.2940 (3)0.60705 (15)0.6525 (3)0.0349 (7)
C10.3412 (4)0.57904 (16)0.7920 (3)0.0360 (7)
C20.3972 (4)0.62356 (17)0.9080 (3)0.0423 (8)
H20.43110.60631.00040.051*
C30.4035 (4)0.69155 (18)0.8893 (4)0.0494 (9)
H30.44040.71970.96840.059*
C40.3549 (4)0.71867 (18)0.7520 (4)0.0553 (10)
H40.35860.76490.73920.066*
C50.3019 (4)0.67719 (17)0.6368 (4)0.0481 (9)
H50.27020.69560.54540.058*
C70.2314 (4)0.56952 (15)0.5204 (3)0.0351 (7)
H70.19760.59480.43670.042*
C80.1417 (4)0.48009 (16)0.3607 (3)0.0420 (8)
H8A0.15190.51260.29190.050*
H8B0.03210.47300.34280.050*
C90.2177 (4)0.41441 (16)0.3450 (3)0.0379 (8)
H9A0.32930.42060.37890.045*
H9B0.19450.38070.40510.045*
C100.2450 (4)0.32330 (17)0.1916 (3)0.0414 (8)
H10A0.21360.29040.24820.050*
H10B0.35640.32920.23390.050*
C110.2048 (4)0.29752 (17)0.0403 (3)0.0454 (9)
H11A0.25380.25420.04190.054*
H11B0.24460.3284−0.01410.054*
C120.0304 (4)0.29045 (18)−0.0318 (4)0.0507 (9)
H12A0.00640.2773−0.13080.061*
H12B−0.00820.25580.01580.061*
C13−0.0471 (4)0.35675 (18)−0.0247 (3)0.0476 (9)
H13A−0.15870.3514−0.06670.057*
H13B−0.01560.3900−0.08050.057*
C14−0.0063 (4)0.38173 (17)0.1267 (3)0.0422 (8)
H14A−0.05550.42490.12670.051*
H14B−0.04420.35030.18140.051*
H2C0.198 (5)0.4214 (14)0.148 (4)0.080*
H2B0.295 (4)0.492 (2)−0.009 (2)0.080*
H2A0.330 (4)0.5124 (18)0.128 (3)0.080*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Zn10.0448 (3)0.0329 (2)0.0281 (2)0.00015 (17)0.01246 (17)0.00067 (15)
Cl10.0473 (6)0.0665 (6)0.0490 (5)0.0112 (5)0.0150 (4)0.0005 (5)
Cl20.0635 (6)0.0507 (5)0.0599 (6)−0.0155 (5)0.0266 (5)0.0007 (4)
O10.0800 (18)0.0341 (13)0.0296 (12)−0.0072 (12)0.0238 (12)−0.0028 (10)
O20.0692 (19)0.0562 (16)0.0411 (14)−0.0195 (13)0.0248 (14)−0.0026 (12)
N10.0398 (16)0.0353 (14)0.0255 (13)0.0008 (12)0.0132 (12)−0.0010 (11)
N20.0331 (15)0.0381 (14)0.0252 (13)0.0002 (12)0.0099 (11)0.0004 (11)
C60.0319 (18)0.0368 (17)0.0374 (18)0.0024 (14)0.0138 (15)0.0022 (14)
C10.0355 (19)0.0385 (17)0.0386 (19)0.0004 (14)0.0187 (15)−0.0065 (14)
C20.046 (2)0.047 (2)0.0370 (19)−0.0021 (16)0.0183 (16)−0.0113 (15)
C30.037 (2)0.045 (2)0.068 (3)−0.0056 (16)0.0200 (19)−0.0248 (19)
C40.050 (2)0.0339 (19)0.080 (3)0.0040 (17)0.020 (2)−0.0045 (19)
C50.049 (2)0.0342 (18)0.060 (2)0.0049 (16)0.0171 (19)0.0042 (17)
C70.0336 (18)0.0404 (19)0.0336 (18)0.0073 (14)0.0145 (15)0.0088 (14)
C80.047 (2)0.048 (2)0.0294 (17)0.0098 (17)0.0113 (16)0.0019 (15)
C90.043 (2)0.0495 (19)0.0190 (16)0.0072 (16)0.0082 (14)−0.0001 (13)
C100.039 (2)0.0447 (19)0.0378 (19)0.0078 (16)0.0102 (16)0.0010 (15)
C110.045 (2)0.045 (2)0.045 (2)0.0031 (16)0.0135 (17)−0.0076 (16)
C120.049 (2)0.053 (2)0.047 (2)−0.0069 (18)0.0124 (18)−0.0116 (17)
C130.036 (2)0.063 (2)0.0363 (19)−0.0028 (17)0.0029 (16)−0.0081 (17)
C140.0313 (19)0.050 (2)0.041 (2)0.0048 (16)0.0077 (15)−0.0008 (16)
Geometric parameters (Å, °) top
Zn1—O11.929 (2)C4—H40.93
Zn1—N12.024 (2)C5—H50.93
Zn1—Cl22.2066 (10)C7—H70.93
Zn1—Cl12.2523 (10)C8—C91.514 (4)
O1—C11.319 (4)C8—H8A0.97
O2—H2B0.84 (3)C8—H8B0.97
O2—H2A0.85 (3)C9—H9A0.97
N1—C71.287 (4)C9—H9B0.97
N1—C81.457 (4)C10—C111.512 (4)
N2—C91.496 (4)C10—H10A0.97
N2—C101.496 (4)C10—H10B0.97
N2—C141.499 (4)C11—C121.520 (5)
N2—H2C0.90 (4)C11—H11A0.97
C6—C51.407 (4)C11—H11B0.97
C6—C11.420 (4)C12—C131.511 (5)
C6—C71.448 (4)C12—H12A0.97
C1—C21.404 (4)C12—H12B0.97
C2—C31.368 (5)C13—C141.507 (4)
C2—H20.93C13—H13A0.97
C3—C41.393 (5)C13—H13B0.97
C3—H30.93C14—H14A0.97
C4—C51.360 (5)C14—H14B0.97
O1—Zn1—N195.83 (10)C9—C8—H8A110.0
O1—Zn1—Cl2113.80 (8)N1—C8—H8B110.0
N1—Zn1—Cl2111.04 (8)C9—C8—H8B110.0
O1—Zn1—Cl1109.48 (8)H8A—C8—H8B108.3
N1—Zn1—Cl1109.22 (8)N2—C9—C8113.5 (2)
Cl2—Zn1—Cl1115.66 (4)N2—C9—H9A108.9
C1—O1—Zn1123.71 (18)C8—C9—H9A108.9
H2B—O2—H2A106 (2)N2—C9—H9B108.9
C7—N1—C8116.8 (3)C8—C9—H9B108.9
C7—N1—Zn1119.9 (2)H9A—C9—H9B107.7
C8—N1—Zn1123.31 (19)N2—C10—C11111.2 (2)
C9—N2—C10109.1 (2)N2—C10—H10A109.4
C9—N2—C14113.8 (2)C11—C10—H10A109.4
C10—N2—C14110.6 (2)N2—C10—H10B109.4
C9—N2—H2C103 (3)C11—C10—H10B109.4
C10—N2—H2C112 (3)H10A—C10—H10B108.0
C14—N2—H2C108 (3)C10—C11—C12110.9 (3)
C5—C6—C1119.1 (3)C10—C11—H11A109.4
C5—C6—C7115.4 (3)C12—C11—H11A109.4
C1—C6—C7125.4 (3)C10—C11—H11B109.4
O1—C1—C2118.6 (3)C12—C11—H11B109.4
O1—C1—C6123.9 (3)H11A—C11—H11B108.0
C2—C1—C6117.4 (3)C13—C12—C11109.5 (3)
C3—C2—C1122.1 (3)C13—C12—H12A109.8
C3—C2—H2119.0C11—C12—H12A109.8
C1—C2—H2119.0C13—C12—H12B109.8
C2—C3—C4120.1 (3)C11—C12—H12B109.8
C2—C3—H3120.0H12A—C12—H12B108.2
C4—C3—H3120.0C12—C13—C14112.1 (3)
C5—C4—C3119.7 (3)C12—C13—H13A109.2
C5—C4—H4120.2C14—C13—H13A109.2
C3—C4—H4120.2C12—C13—H13B109.2
C4—C5—C6121.6 (3)C14—C13—H13B109.2
C4—C5—H5119.2H13A—C13—H13B107.9
C6—C5—H5119.2N2—C14—C13110.0 (3)
N1—C7—C6127.5 (3)N2—C14—H14A109.7
N1—C7—H7116.2C13—C14—H14A109.7
C6—C7—H7116.2N2—C14—H14B109.7
N1—C8—C9108.6 (2)C13—C14—H14B109.7
N1—C8—H8A110.0H14A—C14—H14B108.2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2C···O20.90 (4)1.81 (4)2.712 (3)177 (4)
O2—H2B···O1i0.84 (3)1.91 (3)2.741 (3)168 (4)
O2—H2A···Cl1ii0.85 (3)2.44 (3)3.272 (3)168 (4)
Symmetry codes: (i) x, y, z−1; (ii) −x+1, −y+1, −z+1.
Table 1
Selected geometric parameters (Å, °) top
Zn1—O11.929 (2)Zn1—Cl22.2066 (10)
Zn1—N12.024 (2)Zn1—Cl12.2523 (10)
O1—Zn1—N195.83 (10)O1—Zn1—Cl1109.48 (8)
O1—Zn1—Cl2113.80 (8)N1—Zn1—Cl1109.22 (8)
N1—Zn1—Cl2111.04 (8)Cl2—Zn1—Cl1115.66 (4)
Table 2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2C···O20.90 (4)1.81 (4)2.712 (3)177 (4)
O2—H2B···O1i0.84 (3)1.91 (3)2.741 (3)168 (4)
O2—H2A···Cl1ii0.85 (3)2.44 (3)3.272 (3)168 (4)
Symmetry codes: (i) x, y, z−1; (ii) −x+1, −y+1, −z+1.
Acknowledgements top

The authors acknowledge China Medical University for support of this research.

references
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