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Acta Cryst. (2009). E65, m282    [ doi:10.1107/S1600536809004346 ]

4-(3-Ammoniopropyl)morpholin-4-ium tetrachloridozincate(II)

M. El Glaoui, E. Jeanneau, M. Rzaigui and C. Ben Nasr

Abstract top

In the title compound, (C7H18N2O)[ZnCl4], the ZnII ion is coordinated by four Cl atoms in a close to tetrahedral geometry. The crystal packing exhibits C-H...Cl, N-H...Cl and N-H...O hydrogen bonds.

Comment top

Hybrid compounds have many practical and potential applications in various field (Tao et al., 2003; Bringley and Rajeswaran, 2006). In these materials, the crystal packing is ensured by hydrogen bonds and coulombic interactions (Brammer et al., 2002). Here we report the crystal structure of the title compound, 4-(3-ammoniopropyl)morpholin-4-ium tetrachlorozincate (II) (Fig. 1).

As shown in Fig. 1, to ensure charge balance, the organic species is double protonated at N1 and N2 nitrogen atoms. The structure consists essentially of an 4-(3-ammoniopropyl)morpholin-4-ium and [ZnCl4]2- anion which are held together by N—H···Cl and C—H···Cl hydrogen bonds so as to build layers developing parallel to (a, c) planes (Fig. 2). These layers, situated at y = 1/4 and y = 3/4, are themselves interconnected by a set of N2—H···Cl hydrogen bonds (Table 1), alternating with layers, to form a three dimensional infinite network (Fig. 3). The Zn (II) ion is in tetrahedral coordination environment composed of four chloride ions. Each ZnCl42- anion is connected to its neighbors organic cations, which are associated via N—H···O hydrogen bonds, by N—H···Cl and C—H···Cl interactions involving four chlorine atoms (Table 1). The Cl1 and Cl4 are simple acceptors, the Cl3 is double acceptor and the Cl2 is triple acceptor of hydrogen bonds. The (N)—H···Cl distances, varying between 2.42 and 2.54 Å, are smaller than the sum of the Van der Walls radii of the chlorine and hydrogen atoms [r(Cl) + r(H) = 2.81 Å]. Consequently, these values correspond well to strong hydrogen bonds.

However, it is worth noticing that the Zn—Cl bond lengths and Cl—Zn—Cl bond angles in the [ZnCl4]2- anion are not equal to one another but vary with the environment around the Cl atoms(Valkonen et al., 2006). In the title compound, the Zn—Cl bond lengths vary between 2.2486 (4) and 2.2950 (4) Å. The Cl—Zn—Cl bond angles range from 104.32 (1) to 114.43 (2) °. These values indicate that the anionic [ZnCl4]2- tetrahedron is slightly distorted (Guo et al., 2007).

Related literature top

For common applications of this material, see: Bringley & Rajeswaran (2006); Tao et al. (2003). For structure cohesion, see: Brammer et al. (2002). For a discussion of Zn—Cl distances and Cl—Zn—Cl bond angles, see: Guo et al. (2007); Valkonen et al. (2006). For the weighting scheme, see: Prince (1982); Watkin (1994).

Experimental top

ZnCl2, aqueous 1M HCl solution and 3-Morpholinopropylamine in a 1:2:1 molar ratio were mixed and dissolved in sufficient ethanol. Single crystals suitable for X-ray diffraction were prepared by evaporation of a solution of the title compound in ethanol at room temperature after a few days.

Refinement top

The H atoms were all located in a difference map, but those attached to carbon atoms were repositioned geometrically. The H atoms were initially refined with soft restraints on the bond lengths and angles to regularize their geometry (C—H in the range 0.93–0.98, N—H in the range 0.86–0.89 and O—H = 0.82 Å) and Uiso(H) (in the range 1.2–1.5 times Ueq of the parent atom), after which the positions were refined with riding constraints.

Computing details top

Data collection: Xcalibur User Manual (Oxford Diffraction, 2002); cell refinement: CrysAlis RED (Oxford Diffraction, 2002); data reduction: CrysAlis RED (Oxford Diffraction, 2002); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: CRYSTALS (Betteridge et al., 2003).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound, showing displacement ellipsoids drawn at the 40% probability level.
[Figure 2] Fig. 2. Crystal structure of (I) viewed along b axis showing the layered organization.
[Figure 3] Fig. 3. The packing of (I) viewed down the a axis showing layers at y = 1/4 and y = 3/4.
4-(3-Ammoniopropyl)morpholin-4-ium tetrachloridozincate(II) top
Crystal data top
(C7H18N2O)[ZnCl4]F(000) = 720
Mr = 353.42Dx = 1.712 Mg m−3
Monoclinic, P21/cMo Kα radiation, λ = 0.7107 Å
Hall symbol: -P 2ybcCell parameters from 7336 reflections
a = 6.2765 (2) Åθ = 2.8–29.2°
b = 14.3552 (4) ŵ = 2.55 mm−1
c = 15.4858 (6) ÅT = 293 K
β = 100.759 (4)°Block, colorless
V = 1370.75 (8) Å30.17 × 0.09 × 0.08 mm
Z = 4
Data collection top
Oxford Diffraction XCALIBUR area-detector
diffractometer		3304 independent reflections
Radiation source: Enhance (Mo) X-ray Source2815 reflections with I > 2σ(I)
graphiteRint = 0.021
Detector resolution: 15.9897 pixels mm-1θmax = 29.3°, θmin = 2.8°
φ and ω scansh = −8→8
Absorption correction: multi-scan
(CrysAlis RED; Oxford Diffraction, 2002)		k = −18→18
Tmin = 0.63, Tmax = 0.82l = −18→20
13120 measured reflections
Refinement top
Refinement on FHydrogen site location: inferred from neighbouring sites
Least-squares matrix: fullH-atom parameters constrained
R[F2 > 2σ(F2)] = 0.019 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) [weight] = 1.0/[A0*T0(x) + A1*T1(x) ··· + An-1]*Tn-1(x)]
where Ai are the Chebychev coefficients listed below and x = F /Fmax Method = Robust Weighting (Prince, 1982) W = [weight] * [1-(deltaF/6*sigmaF)2]2 Ai are: 8.69 -6.08 5.75
wR(F2) = 0.020(Δ/σ)max = 0.001
S = 1.04Δρmax = 0.27 e Å−3
2696 reflectionsΔρmin = −0.19 e Å−3
137 parametersExtinction correction: Larson (1970), Equation 22
0 restraintsExtinction coefficient: 64 (4)
Primary atom site location: structure-invariant direct methods
Crystal data top
(C7H18N2O)[ZnCl4]V = 1370.75 (8) Å3
Mr = 353.42Z = 4
Monoclinic, P21/cMo Kα radiation
a = 6.2765 (2) ŵ = 2.55 mm−1
b = 14.3552 (4) ÅT = 293 K
c = 15.4858 (6) Å0.17 × 0.09 × 0.08 mm
β = 100.759 (4)°
Data collection top
Oxford Diffraction XCALIBUR area-detector
diffractometer		3304 independent reflections
Absorption correction: multi-scan
(CrysAlis RED; Oxford Diffraction, 2002)		2815 reflections with I > 2σ(I)
Tmin = 0.63, Tmax = 0.82Rint = 0.021
13120 measured reflectionsθmax = 29.3°
Refinement top
R[F2 > 2σ(F2)] = 0.019H-atom parameters constrained
wR(F2) = 0.020Δρmax = 0.27 e Å−3
S = 1.04Δρmin = −0.19 e Å−3
2696 reflectionsAbsolute structure: ?
137 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
Special details top

Refinement. Data with I<3σ(I) were excluded from the refinement.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Zn10.37044 (3)0.371470 (11)0.756164 (11)0.0273
Cl10.48665 (7)0.47971 (3)0.85946 (3)0.0402
Cl20.00747 (6)0.35230 (3)0.74949 (3)0.0367
Cl30.51658 (6)0.22854 (2)0.79921 (3)0.0372
Cl40.43433 (6)0.42069 (3)0.62551 (2)0.0402
C10.2040 (3)0.73398 (12)0.47182 (11)0.0383
C20.2358 (3)0.83554 (14)0.45739 (12)0.0468
C3−0.0795 (3)0.87396 (11)0.50847 (11)0.0441
C4−0.1308 (2)0.77313 (10)0.52356 (10)0.0319
C50.0385 (3)0.61461 (10)0.54896 (10)0.0319
C6−0.1030 (2)0.58498 (10)0.61278 (9)0.0310
C7−0.0059 (2)0.60272 (10)0.70780 (9)0.0284
O0.0323 (2)0.88265 (8)0.43720 (8)0.0456
N10.07386 (18)0.71776 (8)0.54268 (7)0.0256
N2−0.1501 (2)0.56344 (9)0.76395 (8)0.0355
H10.15130.73710.59240.0370*
H2−0.09770.57580.81910.0530*
H3−0.16100.50370.75690.0543*
H4−0.27860.58810.75080.0540*
H50.33910.70340.49020.0478*
H60.12540.70590.41900.0461*
H70.32470.86250.50900.0563*
H80.30800.84100.40800.0566*
H90.00950.90010.56120.0534*
H10−0.21540.90710.49380.0536*
H11−0.20370.76730.57270.0386*
H12−0.21850.74680.47140.0373*
H130.18200.58790.56380.0378*
H14−0.03050.59630.48960.0376*
H15−0.12240.51880.60590.0375*
H16−0.24280.61610.59820.0365*
H170.13340.57400.72400.0348*
H180.00680.66790.71930.0354*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Zn10.02689 (9)0.02429 (9)0.02946 (9)−0.00028 (6)0.00203 (6)0.00055 (6)
Cl10.0496 (2)0.03524 (19)0.03582 (19)−0.00756 (15)0.00812 (16)−0.00963 (14)
Cl20.02569 (16)0.03157 (17)0.0513 (2)−0.00010 (12)0.00342 (14)0.00177 (15)
Cl30.02699 (16)0.02632 (16)0.0545 (2)0.00182 (12)−0.00201 (15)0.00397 (15)
Cl40.0402 (2)0.0493 (2)0.03073 (18)−0.00006 (16)0.00604 (15)0.00497 (15)
C10.0350 (8)0.0496 (9)0.0336 (8)0.0016 (7)0.0147 (6)0.0046 (7)
C20.0456 (9)0.0538 (10)0.0415 (9)−0.0109 (8)0.0096 (7)0.0126 (8)
C30.0648 (11)0.0334 (8)0.0370 (8)0.0071 (7)0.0177 (8)0.0041 (6)
C40.0333 (7)0.0331 (7)0.0306 (7)0.0031 (6)0.0093 (6)0.0007 (5)
C50.0405 (8)0.0261 (7)0.0297 (7)0.0009 (5)0.0084 (6)−0.0024 (5)
C60.0367 (7)0.0256 (7)0.0300 (7)−0.0060 (5)0.0047 (6)−0.0010 (5)
C70.0318 (7)0.0238 (6)0.0293 (7)−0.0020 (5)0.0052 (5)0.0007 (5)
O0.0610 (8)0.0437 (7)0.0337 (6)0.0007 (5)0.0133 (5)0.0131 (5)
N10.0283 (6)0.0286 (6)0.0192 (5)−0.0033 (4)0.0027 (4)−0.0002 (4)
N20.0441 (7)0.0331 (6)0.0310 (6)−0.0010 (5)0.0119 (5)0.0018 (5)
Geometric parameters (Å, °) top
Zn1—Cl12.2515 (4)C5—H130.966
Zn1—Cl22.2779 (4)C5—H140.976
Zn1—Cl32.2950 (4)C6—C71.5056 (19)
Zn1—Cl42.2486 (4)C6—H160.973
O—C21.427 (2)C6—H150.961
O—C31.419 (2)C7—N21.4790 (18)
C2—C11.494 (2)C7—H180.954
C2—H70.966C7—H170.957
C2—H80.962N2—H20.875
C1—N11.5036 (18)N2—H30.866
C1—H50.950N2—H40.869
C1—H60.961C4—C31.510 (2)
N1—C51.5032 (17)C4—H110.963
N1—C41.4922 (18)C4—H120.965
N1—H10.875C3—H90.974
C5—C61.508 (2)C3—H100.966
Cl1—Zn1—Cl2107.710 (16)C5—C6—C7114.36 (12)
Cl1—Zn1—Cl3110.593 (17)C5—C6—H16109.5
Cl2—Zn1—Cl3104.316 (14)C7—C6—H16109.4
Cl1—Zn1—Cl4109.501 (17)C5—C6—H15106.5
Cl2—Zn1—Cl4109.997 (17)C7—C6—H15107.2
Cl3—Zn1—Cl4114.428 (17)H16—C6—H15109.8
C2—O—C3109.87 (13)C6—C7—N2109.25 (12)
O—C2—C1110.87 (14)C6—C7—H18110.7
O—C2—H7110.3N2—C7—H18107.7
C1—C2—H7109.9C6—C7—H17111.5
O—C2—H8108.8N2—C7—H17108.1
C1—C2—H8107.1H18—C7—H17109.5
H7—C2—H8109.9C7—N2—H2109.7
C2—C1—N1111.48 (13)C7—N2—H3110.2
C2—C1—H5111.0H2—N2—H3109.4
N1—C1—H5106.6C7—N2—H4110.5
C2—C1—H6110.1H2—N2—H4108.0
N1—C1—H6107.0H3—N2—H4109.0
H5—C1—H6110.5N1—C4—C3109.92 (13)
C1—N1—C5107.86 (11)N1—C4—H11108.4
C1—N1—C4109.72 (11)C3—C4—H11110.6
C5—N1—C4113.91 (11)N1—C4—H12107.1
C1—N1—H1107.7C3—C4—H12110.5
C5—N1—H1108.7H11—C4—H12110.3
C4—N1—H1108.8C4—C3—O110.79 (13)
N1—C5—C6115.63 (11)C4—C3—H9110.1
N1—C5—H13105.3O—C3—H9109.2
C6—C5—H13111.7C4—C3—H10107.7
N1—C5—H14104.5O—C3—H10108.4
C6—C5—H14109.2H9—C3—H10110.5
H13—C5—H14110.3
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2···Oi0.871.952.821 (2)173
N2—H3···Cl20.872.433.209 (2)150
C1—H6···Cl2ii0.962.723.653 (2)164
C7—H18···Cl2iii0.952.703.644 (2)173
C5—H14···Cl4ii0.982.823.657 (2)144
N2—H4···Cl3iii0.872.543.320 (2)149
N1—H1···Cl3iv0.882.423.206 (2)149
C2—H7···Cl1iv0.972.743.677 (2)165
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) −x, −y+1, −z+1; (iii) −x, y+1/2, −z+3/2; (iv) −x+1, y+1/2, −z+3/2.
Table 1
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2···Oi0.871.952.821 (2)173
N2—H3···Cl20.872.433.209 (2)150
C1—H6···Cl2ii0.962.723.653 (2)164
C7—H18···Cl2iii0.952.703.644 (2)173
C5—H14···Cl4ii0.982.823.657 (2)144
N2—H4···Cl3iii0.872.543.320 (2)149
N1—H1···Cl3iv0.882.423.206 (2)149
C2—H7···Cl1iv0.972.743.677 (2)165
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) −x, −y+1, −z+1; (iii) −x, y+1/2, −z+3/2; (iv) −x+1, y+1/2, −z+3/2.
Acknowledgements top

We acknowledge the support provided by the Secretary of State for Scientific Research and Technology of Tunisia.

references
References top

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