metal-organic compounds
1-(2,5-Dimethylphenyl)piperazine-1,4-diium tetrachloridozincate monohydrate
aLaboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, 7021 Zarzouna, Tunisia, bLaboratoire C2P2 (COMS group), École Supérieure de Chimie Physique Électronique, Villeurbanne, France, and cYoungstown State University, Department of Chemistry, One University Plaza, Youngstown, Ohio 44555-3663, USA
*Correspondence e-mail: cherif_bennasr@yahoo.fr
In the title compound, (C12H20N2)[ZnCl4]·H2O, the two piperazine N atoms are protonated and the [ZnCl4]2− anions adopt a slightly distorted tetrahedral configuration. In the crystal, O—H⋯Cl hydrogen bonds link the tetrachloridozincate anions and the water molecules into corrugated inorganic chains parallel to [010]. The is stabilized by N—H⋯Cl, N—H⋯O and O—H⋯Cl hydrogen bonds, with the N—H hydrogen bond originating from one of the two N atoms being trifurcated.
Related literature
For common applications of organic–inorganic hybrid materials, see: Dai et al. (2002); Tao et al. (2003). For a related structure and discussion of geometrical features, see: Ben Gharbia et al. (2007). For the geometry around the zinc atom, see: Harrison (2005).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536811007562/vn2004sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811007562/vn2004Isup2.hkl
A mixture of an aqueous solution of 1-(2,5-dimethyphenyl)piperazine (2 mmol, 0.380 g), zinc chloride (2 mmol, 0.396 g) and HCl (10 ml, 0.4 M) in a Petri dish was slowly evaporated at room temperature. Single crystals of the title compound, suitable for X-ray
were obtained after several days by slow evaporation at room temperature (yield 68%).Reflection (0 0 1) was obscured by the beamstop and was omitted from the
C—H hydrogen atoms were placed in calculated positions with C—H distances in the range 0.93–0.97 Å. The water hydrogen atom positions were refined with O—H distance restraints of 0.84 (2) Å, and the N—H distance of N1 to 0.91 (2) Å. The Uiso(H) values of all H atoms were constrained to 1.2 or 1.5 times Ueq of the respective parent atom.Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); 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).Fig. 1. A view of the title compound, showing 50% probability displacement ellipsoids, arbitrary spheres for the H atoms, and the atom numbering scheme. | |
Fig. 2. Projection along the a axis of the inorganic corrugated chain in the structure of the title compound. Hydrogen bonds are denoted as dashed lines. | |
Fig. 3. The packing of [1-(2,5-(CH3)2C6H3)C4H11N2]ZnCl4.H2O, viewed down the b axis. Hydrogen bonds are denoted by dashed lines. |
(C12H20N2)[ZnCl4]·H2O | F(000) = 856 |
Mr = 417.49 | Dx = 1.624 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 6435 reflections |
a = 7.0999 (8) Å | θ = 2.6–31.0° |
b = 8.0679 (8) Å | µ = 2.06 mm−1 |
c = 29.933 (3) Å | T = 100 K |
β = 95.314 (2)° | Block, colourless |
V = 1707.2 (3) Å3 | 0.45 × 0.39 × 0.31 mm |
Z = 4 |
Bruker SMART APEX CCD diffractometer | 4995 independent reflections |
Radiation source: fine-focus sealed tube | 4738 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.016 |
ω scans | θmax = 31.0°, θmin = 2.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −7→10 |
Tmin = 0.589, Tmax = 0.746 | k = −11→9 |
10440 measured reflections | l = −43→35 |
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)] = 0.027 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.064 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.13 | w = 1/[σ2(Fo2) + (0.0258P)2 + 1.2487P] where P = (Fo2 + 2Fc2)/3 |
4995 reflections | (Δ/σ)max = 0.001 |
194 parameters | Δρmax = 0.56 e Å−3 |
3 restraints | Δρmin = −0.44 e Å−3 |
(C12H20N2)[ZnCl4]·H2O | V = 1707.2 (3) Å3 |
Mr = 417.49 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.0999 (8) Å | µ = 2.06 mm−1 |
b = 8.0679 (8) Å | T = 100 K |
c = 29.933 (3) Å | 0.45 × 0.39 × 0.31 mm |
β = 95.314 (2)° |
Bruker SMART APEX CCD diffractometer | 4995 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 4738 reflections with I > 2σ(I) |
Tmin = 0.589, Tmax = 0.746 | Rint = 0.016 |
10440 measured reflections |
R[F2 > 2σ(F2)] = 0.027 | 3 restraints |
wR(F2) = 0.064 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.13 | Δρmax = 0.56 e Å−3 |
4995 reflections | Δρmin = −0.44 e Å−3 |
194 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 | ||
C1 | 0.8731 (2) | 0.27945 (19) | 0.07313 (5) | 0.0113 (3) | |
C2 | 0.8347 (2) | 0.4334 (2) | 0.05374 (5) | 0.0130 (3) | |
H2 | 0.8573 | 0.5314 | 0.0710 | 0.016* | |
C3 | 0.7627 (2) | 0.4442 (2) | 0.00884 (5) | 0.0141 (3) | |
C4 | 0.7332 (2) | 0.2967 (2) | −0.01512 (5) | 0.0165 (3) | |
H4 | 0.6897 | 0.3009 | −0.0461 | 0.020* | |
C5 | 0.7664 (2) | 0.1440 (2) | 0.00543 (5) | 0.0167 (3) | |
H5 | 0.7415 | 0.0460 | −0.0117 | 0.020* | |
C6 | 0.8351 (2) | 0.1302 (2) | 0.05048 (5) | 0.0132 (3) | |
C7 | 0.7193 (2) | 0.6104 (2) | −0.01244 (6) | 0.0181 (3) | |
H7A | 0.8379 | 0.6673 | −0.0171 | 0.027* | |
H7B | 0.6471 | 0.6773 | 0.0073 | 0.027* | |
H7C | 0.6448 | 0.5950 | −0.0414 | 0.027* | |
C8 | 0.8579 (2) | −0.0383 (2) | 0.07188 (6) | 0.0171 (3) | |
H8A | 0.9591 | −0.0345 | 0.0965 | 0.026* | |
H8B | 0.8903 | −0.1193 | 0.0494 | 0.026* | |
H8C | 0.7391 | −0.0709 | 0.0837 | 0.026* | |
C9 | 1.0911 (2) | 0.4117 (2) | 0.13428 (5) | 0.0138 (3) | |
H9A | 1.0178 | 0.5160 | 0.1349 | 0.017* | |
H9B | 1.1859 | 0.4248 | 0.1123 | 0.017* | |
C10 | 1.1903 (2) | 0.3783 (2) | 0.18030 (5) | 0.0134 (3) | |
H10A | 1.2682 | 0.2768 | 0.1793 | 0.016* | |
H10B | 1.2755 | 0.4719 | 0.1894 | 0.016* | |
C11 | 0.8135 (2) | 0.2553 (2) | 0.15357 (5) | 0.0123 (3) | |
H11A | 0.7264 | 0.1626 | 0.1448 | 0.015* | |
H11B | 0.7382 | 0.3586 | 0.1535 | 0.015* | |
C12 | 0.9092 (2) | 0.2244 (2) | 0.20022 (5) | 0.0136 (3) | |
H12A | 0.8123 | 0.2206 | 0.2220 | 0.016* | |
H12B | 0.9739 | 0.1156 | 0.2009 | 0.016* | |
Cl1 | 0.09333 (5) | 0.80876 (5) | 0.181490 (13) | 0.01515 (8) | |
Cl2 | 0.52791 (5) | 0.64529 (5) | 0.132584 (12) | 0.01449 (8) | |
Cl3 | 0.34586 (5) | 1.07346 (5) | 0.105858 (12) | 0.01456 (8) | |
Cl4 | 0.55737 (5) | 0.97161 (5) | 0.219958 (12) | 0.01489 (8) | |
N1 | 0.95988 (18) | 0.27010 (16) | 0.12030 (4) | 0.0100 (2) | |
H1A | 1.034 (3) | 0.180 (2) | 0.1220 (7) | 0.012* | |
N2 | 1.04987 (18) | 0.35667 (16) | 0.21386 (4) | 0.0115 (2) | |
H2A | 0.9874 | 0.4552 | 0.2171 | 0.017* | |
H2B | 1.1124 | 0.3297 | 0.2412 | 0.017* | |
O1 | 0.77955 (16) | 0.59834 (15) | 0.22753 (4) | 0.0141 (2) | |
H1C | 0.721 (3) | 0.632 (3) | 0.2039 (7) | 0.037 (7)* | |
H1B | 0.691 (3) | 0.564 (3) | 0.2421 (8) | 0.033 (7)* | |
Zn1 | 0.38078 (2) | 0.86992 (2) | 0.158284 (6) | 0.01076 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0112 (6) | 0.0153 (7) | 0.0071 (6) | −0.0005 (5) | 0.0002 (5) | −0.0015 (5) |
C2 | 0.0120 (6) | 0.0152 (7) | 0.0118 (7) | −0.0001 (5) | 0.0007 (5) | −0.0004 (5) |
C3 | 0.0101 (6) | 0.0200 (8) | 0.0125 (7) | 0.0021 (5) | 0.0017 (5) | 0.0024 (6) |
C4 | 0.0137 (7) | 0.0264 (8) | 0.0094 (7) | 0.0002 (6) | 0.0001 (5) | −0.0008 (6) |
C5 | 0.0168 (7) | 0.0205 (8) | 0.0123 (7) | −0.0009 (6) | −0.0010 (5) | −0.0051 (6) |
C6 | 0.0122 (7) | 0.0153 (7) | 0.0119 (7) | −0.0006 (5) | 0.0006 (5) | −0.0023 (5) |
C7 | 0.0152 (7) | 0.0236 (8) | 0.0156 (7) | 0.0042 (6) | 0.0011 (6) | 0.0058 (6) |
C8 | 0.0211 (8) | 0.0133 (7) | 0.0166 (7) | −0.0024 (6) | −0.0002 (6) | −0.0032 (6) |
C9 | 0.0160 (7) | 0.0142 (7) | 0.0106 (6) | −0.0057 (5) | −0.0021 (5) | −0.0001 (5) |
C10 | 0.0121 (6) | 0.0174 (7) | 0.0104 (6) | −0.0028 (5) | −0.0003 (5) | −0.0005 (5) |
C11 | 0.0114 (6) | 0.0163 (7) | 0.0092 (6) | −0.0015 (5) | 0.0013 (5) | −0.0012 (5) |
C12 | 0.0167 (7) | 0.0137 (7) | 0.0101 (6) | −0.0043 (5) | 0.0005 (5) | 0.0002 (5) |
Cl1 | 0.01373 (16) | 0.01711 (17) | 0.01506 (17) | −0.00208 (13) | 0.00366 (12) | −0.00155 (13) |
Cl2 | 0.01657 (17) | 0.01327 (16) | 0.01348 (16) | 0.00368 (13) | 0.00053 (12) | −0.00140 (12) |
Cl3 | 0.01723 (17) | 0.01358 (16) | 0.01277 (16) | 0.00171 (13) | 0.00079 (12) | 0.00279 (12) |
Cl4 | 0.01381 (16) | 0.01768 (17) | 0.01260 (16) | −0.00089 (13) | −0.00196 (12) | −0.00211 (13) |
N1 | 0.0111 (5) | 0.0108 (6) | 0.0078 (5) | 0.0000 (4) | −0.0004 (4) | −0.0009 (4) |
N2 | 0.0139 (6) | 0.0122 (6) | 0.0083 (5) | 0.0003 (4) | 0.0003 (4) | −0.0007 (4) |
O1 | 0.0130 (5) | 0.0165 (5) | 0.0126 (5) | 0.0005 (4) | 0.0006 (4) | 0.0012 (4) |
Zn1 | 0.01151 (9) | 0.01048 (9) | 0.01017 (9) | 0.00058 (6) | 0.00039 (6) | −0.00003 (6) |
C1—C2 | 1.387 (2) | C9—H9B | 0.9900 |
C1—C6 | 1.396 (2) | C10—N2 | 1.490 (2) |
C1—N1 | 1.4892 (18) | C10—H10A | 0.9900 |
C2—C3 | 1.396 (2) | C10—H10B | 0.9900 |
C2—H2 | 0.9500 | C11—N1 | 1.5096 (19) |
C3—C4 | 1.395 (2) | C11—C12 | 1.516 (2) |
C3—C7 | 1.504 (2) | C11—H11A | 0.9900 |
C4—C5 | 1.387 (2) | C11—H11B | 0.9900 |
C4—H4 | 0.9500 | C12—N2 | 1.4923 (19) |
C5—C6 | 1.395 (2) | C12—H12A | 0.9900 |
C5—H5 | 0.9500 | C12—H12B | 0.9900 |
C6—C8 | 1.506 (2) | Cl1—Zn1 | 2.2702 (5) |
C7—H7A | 0.9800 | Cl2—Zn1 | 2.2619 (4) |
C7—H7B | 0.9800 | Cl3—Zn1 | 2.2690 (4) |
C7—H7C | 0.9800 | Cl4—Zn1 | 2.2857 (4) |
C8—H8A | 0.9800 | N1—H1A | 0.901 (15) |
C8—H8B | 0.9800 | N2—H2A | 0.9200 |
C8—H8C | 0.9800 | N2—H2B | 0.9200 |
C9—N1 | 1.5086 (19) | O1—H1C | 0.832 (17) |
C9—C10 | 1.512 (2) | O1—H1B | 0.842 (16) |
C9—H9A | 0.9900 | ||
C2—C1—C6 | 123.19 (13) | N2—C10—H10A | 109.5 |
C2—C1—N1 | 119.34 (13) | C9—C10—H10A | 109.5 |
C6—C1—N1 | 117.47 (13) | N2—C10—H10B | 109.5 |
C1—C2—C3 | 119.92 (15) | C9—C10—H10B | 109.5 |
C1—C2—H2 | 120.0 | H10A—C10—H10B | 108.1 |
C3—C2—H2 | 120.0 | N1—C11—C12 | 110.09 (12) |
C4—C3—C2 | 117.78 (15) | N1—C11—H11A | 109.6 |
C4—C3—C7 | 121.85 (14) | C12—C11—H11A | 109.6 |
C2—C3—C7 | 120.37 (15) | N1—C11—H11B | 109.6 |
C5—C4—C3 | 121.21 (14) | C12—C11—H11B | 109.6 |
C5—C4—H4 | 119.4 | H11A—C11—H11B | 108.2 |
C3—C4—H4 | 119.4 | N2—C12—C11 | 111.49 (12) |
C4—C5—C6 | 121.95 (15) | N2—C12—H12A | 109.3 |
C4—C5—H5 | 119.0 | C11—C12—H12A | 109.3 |
C6—C5—H5 | 119.0 | N2—C12—H12B | 109.3 |
C5—C6—C1 | 115.80 (14) | C11—C12—H12B | 109.3 |
C5—C6—C8 | 119.83 (14) | H12A—C12—H12B | 108.0 |
C1—C6—C8 | 124.34 (14) | C1—N1—C9 | 114.53 (12) |
C3—C7—H7A | 109.5 | C1—N1—C11 | 112.33 (11) |
C3—C7—H7B | 109.5 | C9—N1—C11 | 108.80 (11) |
H7A—C7—H7B | 109.5 | C1—N1—H1A | 106.4 (13) |
C3—C7—H7C | 109.5 | C9—N1—H1A | 104.7 (13) |
H7A—C7—H7C | 109.5 | C11—N1—H1A | 109.6 (13) |
H7B—C7—H7C | 109.5 | C10—N2—C12 | 111.83 (12) |
C6—C8—H8A | 109.5 | C10—N2—H2A | 109.3 |
C6—C8—H8B | 109.5 | C12—N2—H2A | 109.3 |
H8A—C8—H8B | 109.5 | C10—N2—H2B | 109.3 |
C6—C8—H8C | 109.5 | C12—N2—H2B | 109.3 |
H8A—C8—H8C | 109.5 | H2A—N2—H2B | 107.9 |
H8B—C8—H8C | 109.5 | H1C—O1—H1B | 102 (2) |
N1—C9—C10 | 109.95 (12) | Cl2—Zn1—Cl3 | 111.651 (16) |
N1—C9—H9A | 109.7 | Cl2—Zn1—Cl1 | 112.737 (17) |
C10—C9—H9A | 109.7 | Cl3—Zn1—Cl1 | 108.974 (16) |
N1—C9—H9B | 109.7 | Cl2—Zn1—Cl4 | 109.040 (16) |
C10—C9—H9B | 109.7 | Cl3—Zn1—Cl4 | 108.388 (17) |
H9A—C9—H9B | 108.2 | Cl1—Zn1—Cl4 | 105.803 (16) |
N2—C10—C9 | 110.52 (12) | ||
C6—C1—C2—C3 | −3.1 (2) | N1—C9—C10—N2 | −58.83 (17) |
N1—C1—C2—C3 | 176.62 (13) | N1—C11—C12—N2 | 56.18 (17) |
C1—C2—C3—C4 | −0.4 (2) | C2—C1—N1—C9 | −31.94 (19) |
C1—C2—C3—C7 | 179.62 (14) | C6—C1—N1—C9 | 147.82 (14) |
C2—C3—C4—C5 | 2.8 (2) | C2—C1—N1—C11 | 92.83 (16) |
C7—C3—C4—C5 | −177.28 (15) | C6—C1—N1—C11 | −87.40 (16) |
C3—C4—C5—C6 | −1.7 (3) | C10—C9—N1—C1 | −172.56 (12) |
C4—C5—C6—C1 | −1.7 (2) | C10—C9—N1—C11 | 60.82 (16) |
C4—C5—C6—C8 | 176.45 (15) | C12—C11—N1—C1 | 172.87 (12) |
C2—C1—C6—C5 | 4.1 (2) | C12—C11—N1—C9 | −59.25 (16) |
N1—C1—C6—C5 | −175.63 (13) | C9—C10—N2—C12 | 55.24 (17) |
C2—C1—C6—C8 | −173.91 (15) | C11—C12—N2—C10 | −54.17 (17) |
N1—C1—C6—C8 | 6.3 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···Cl3i | 0.90 (2) | 2.46 (2) | 3.2300 (14) | 144 (2) |
N2—H2A···O1 | 0.92 | 1.92 | 2.7925 (17) | 157 |
N2—H2B···O1ii | 0.92 | 2.19 | 2.9145 (17) | 135 |
N2—H2B···Cl4ii | 0.92 | 2.77 | 3.3965 (14) | 127 |
N2—H2B···Cl1iii | 0.92 | 2.85 | 3.4036 (14) | 120 |
O1—H1C···Cl2 | 0.83 (2) | 2.43 (2) | 3.2361 (12) | 164 (2) |
O1—H1B···Cl4iii | 0.84 (2) | 2.31 (2) | 3.1518 (13) | 178 (3) |
Symmetry codes: (i) x+1, y−1, z; (ii) −x+2, y−1/2, −z+1/2; (iii) −x+1, y−1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | (C12H20N2)[ZnCl4]·H2O |
Mr | 417.49 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 7.0999 (8), 8.0679 (8), 29.933 (3) |
β (°) | 95.314 (2) |
V (Å3) | 1707.2 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 2.06 |
Crystal size (mm) | 0.45 × 0.39 × 0.31 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.589, 0.746 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10440, 4995, 4738 |
Rint | 0.016 |
(sin θ/λ)max (Å−1) | 0.725 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.027, 0.064, 1.13 |
No. of reflections | 4995 |
No. of parameters | 194 |
No. of restraints | 3 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.56, −0.44 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···Cl3i | 0.901 (15) | 2.460 (17) | 3.2300 (14) | 143.6 (17) |
N2—H2A···O1 | 0.92 | 1.92 | 2.7925 (17) | 157 |
N2—H2B···O1ii | 0.92 | 2.19 | 2.9145 (17) | 135 |
N2—H2B···Cl4ii | 0.92 | 2.77 | 3.3965 (14) | 127 |
N2—H2B···Cl1iii | 0.92 | 2.85 | 3.4036 (14) | 120 |
O1—H1C···Cl2 | 0.832 (17) | 2.429 (18) | 3.2361 (12) | 164 (2) |
O1—H1B···Cl4iii | 0.842 (16) | 2.311 (16) | 3.1518 (13) | 178 (3) |
Symmetry codes: (i) x+1, y−1, z; (ii) −x+2, y−1/2, −z+1/2; (iii) −x+1, y−1/2, −z+1/2. |
Acknowledgements
We would like to acknowledge the support provided by the Secretary of State for Scientific Research and Technology of Tunisia. The diffractometer was funded by NSF grant 0087210, Ohio Board of Regents grant CAP-491 and YSU.
References
Ben Gharbia, I., Kefi, R. & Ben Nasr, C. (2007). Anal. Sci. 23, 243–244. Google Scholar
Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Dai, J.-C., Wu, X.-T., Fu, Z.-Y., Cui, C.-P., Wu, S.-M., Du, W.-X., Wu, L.-M., Zhang, H.-H. & Sum, Q.-Q. (2002). Inorg. Chem. 41, 1391–1396. Web of Science CSD CrossRef PubMed CAS Google Scholar
Harrison, W. T. A. (2005). Acta Cryst. E61, m1951–m1952. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Tao, J., Yin, X., Jiang, Y.-B., Yang, L.-F., Huang, R.-B. & Zheng, L.-S. (2003). Eur. J. Inorg. Chem. pp. 2678–2682. Web of Science CSD CrossRef Google Scholar
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Organic-inorganic hybrid materials continue to attract much attention due to their potential applications in various fields (Dai et al., 2002; Tao et al., 2003). In this work, we report the crystal structure of one such compound, [1-(2,5-(CH3)2C6H3)C4H11N2]ZnCl4.H2O. As shown in Fig. 1, the asymmetric unit consists of one 1-(2,5-dimethyphenyl)piperazine-1,4-diium dication doubly protonated at the N1 and N2 nitrogen atoms, one water molecule and one [ZnCl4]2- anion. The atomic arrangement of [1-(2,5-(CH3)2C6H3)C4H11N2]ZnCl4.H2O can be described as built up by corrugated inorganic chains of [ZnCl4]2- tetrahedra and water molecules that extend along the b axis, held together by O—H···Cl hydrogen bonds (Fig. 2, Table 1). Two such chains cross the unit cell at z = (2n +1)/4 and x = 1/2. The organic groups are located between these chains and connect to them through N—H···Cl and N—H···O hydrogen bonds to form a three dimensional infinite network (Fig. 3, Table 1). Among all the hydrogen bonds, one is trifurcated: N2—H2B···(Cl1, Cl4, O1). Within the network, the 1-(2,5-dimethylphenyl)piperazine-1,4-diium dications are arranged into antiparallel dimers. No π-π stacking interactions between the phenylene rings or C—H···π interactions towards them are observed. In the organic entity, the piperazine-1,4-diium ring adopts a typical chair conformation and all the geometrical features agree with those found in 1-(2,3-dimethylphenyl)piperazinium tetrachlorozincate(II) monohydrate (Ben Gharbia et al., 2007). It is worth noticing that in the [ZnCl4]2- anion, the Zn—Cl bond lengths and Cl—Zn—Cl bond angles are not equal to one another, but vary with the environment around the Cl atom with Zn—Cl bond lengths between 2.2619 (4) and 2.2857 (4) Å. In the title compound, all the chloride ions are involved in hydrogen bonding. However, only the Cl4 chloride atom participates in two N—H···Cl bonds, and the Zn1—Cl4 bond distance is with 2.2857 (4) Å the longest (Table 1). The Cl—Zn—Cl angles range between 105.803 (16) and 112.737 (17)°. These values indicate that the coordination geometry of the Zn atom can be regarded as being a slightly distorted tetrahedron (Harrison, 2005).