organic compounds
1-Benzylpiperazine-1,4-diium bis(perchlorate) monohydrate
aLaboratoire de Chimie des Matériaux, Faculté des Sciences de Bizerte, 7021 Zarzouna, Tunisia, and bUniversité Lyon1, Centre de Diffractométrie Henri Longchambon, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
*Correspondence e-mail: cherif_bennasr@yahoo.fr
In the title compound, C11H18N22+·2ClO4−·H2O, one perchlorate anion is disordered over two orientations in a 0.66 (3):0.34 (3) ratio. Intermolecular O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds link the cations, anions and water molecules into ribbons extending along [100].
Related literature
For general background to the properties of perchlorate salts containing organic cations, see: Czarnecki et al. (1994); Czupinski et al. (2002, 2006). For related structures, see: Antolini et al. (1982); Place & Willett (1988).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Oxford Diffraction, 2006); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536810023123/cv2717sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810023123/cv2717Isup2.hkl
All H atoms were 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 N—H to 0.86 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. The rotational disorder observed for one perchlorate anion (with Cl1) was modelized using two superimposed molecules with partial occupancies. The molecules were then refined with restraints on the Cl—O bonds, O—Cl—O angles and displacement parameters of the oxygen atoms
Data collection: CrysAlis PRO (Oxford Diffraction, 2006); cell
CrysAlis PRO (Oxford Diffraction, 2006); data reduction: CrysAlis PRO (Oxford Diffraction, 2006); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. View of (I), showing 50% probability displacement ellipsoids and arbitrary spheres for the H atoms. For the disordered perchlorate anion, only major part is shown. |
C11H18N22+·2ClO4−·H2O | Z = 2 |
Mr = 395.19 | F(000) = 412.000 |
Triclinic, P1 | Dx = 1.566 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.7107 Å |
a = 8.6632 (6) Å | Cell parameters from 13879 reflections |
b = 10.0197 (8) Å | θ = 3.5–32.9° |
c = 10.8831 (7) Å | µ = 0.44 mm−1 |
α = 70.184 (7)° | T = 293 K |
β = 83.946 (6)° | Plate, colourless |
γ = 70.560 (7)° | 0.53 × 0.40 × 0.25 mm |
V = 838.05 (12) Å3 |
Oxford Diffraction Xcalibur Atlas Gemini ultra diffractometer | 5885 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 3882 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.045 |
Detector resolution: 10.4685 pixels mm-1 | θmax = 33.0°, θmin = 3.5° |
ω/2\ scans | h = −13→13 |
Absorption correction: analytical (CrysAlis PRO; Oxford Diffraction, 2006) | k = −15→15 |
Tmin = 0.832, Tmax = 0.907 | l = −15→16 |
32031 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.066 | H-atom parameters constrained |
wR(F2) = 0.240 | w = 1/[σ2(Fo2) + (0.15P)2 + 0.05P] where P = (Fo2 + 2Fc2)/3 |
S = 1.12 | (Δ/σ)max < 0.001 |
5885 reflections | Δρmax = 1.04 e Å−3 |
255 parameters | Δρmin = −0.88 e Å−3 |
40 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.062 (11) |
C11H18N22+·2ClO4−·H2O | γ = 70.560 (7)° |
Mr = 395.19 | V = 838.05 (12) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.6632 (6) Å | Mo Kα radiation |
b = 10.0197 (8) Å | µ = 0.44 mm−1 |
c = 10.8831 (7) Å | T = 293 K |
α = 70.184 (7)° | 0.53 × 0.40 × 0.25 mm |
β = 83.946 (6)° |
Oxford Diffraction Xcalibur Atlas Gemini ultra diffractometer | 5885 independent reflections |
Absorption correction: analytical (CrysAlis PRO; Oxford Diffraction, 2006) | 3882 reflections with I > 2σ(I) |
Tmin = 0.832, Tmax = 0.907 | Rint = 0.045 |
32031 measured reflections |
R[F2 > 2σ(F2)] = 0.066 | 40 restraints |
wR(F2) = 0.240 | H-atom parameters constrained |
S = 1.12 | Δρmax = 1.04 e Å−3 |
5885 reflections | Δρmin = −0.88 e Å−3 |
255 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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
N16 | 0.2509 (2) | 0.3896 (2) | 0.78548 (16) | 0.0377 (4) | |
H161 | 0.1556 | 0.3721 | 0.7879 | 0.045* | |
N19 | 0.1505 (3) | 0.7088 (2) | 0.6477 (2) | 0.0507 (5) | |
H191 | 0.2431 | 0.7311 | 0.6393 | 0.061* | |
H192 | 0.0729 | 0.7939 | 0.6086 | 0.061* | |
C17 | 0.2348 (3) | 0.5002 (3) | 0.8544 (2) | 0.0419 (4) | |
H171 | 0.2003 | 0.4603 | 0.9431 | 0.050* | |
H172 | 0.3416 | 0.5114 | 0.8562 | 0.050* | |
C18 | 0.1106 (3) | 0.6496 (3) | 0.7878 (2) | 0.0490 (5) | |
H181 | 0.1085 | 0.7216 | 0.8271 | 0.059* | |
H182 | 0.0026 | 0.6393 | 0.7937 | 0.059* | |
C20 | 0.1645 (4) | 0.5982 (3) | 0.5795 (2) | 0.0560 (6) | |
H201 | 0.1960 | 0.6349 | 0.4910 | 0.067* | |
H202 | 0.0599 | 0.5802 | 0.5822 | 0.067* | |
C21 | 0.2923 (4) | 0.4523 (3) | 0.6457 (2) | 0.0502 (6) | |
H211 | 0.3980 | 0.4667 | 0.6411 | 0.060* | |
H212 | 0.3022 | 0.3805 | 0.6022 | 0.060* | |
C22 | 0.3782 (3) | 0.2403 (3) | 0.8511 (3) | 0.0480 (5) | |
H221 | 0.3960 | 0.1769 | 0.7969 | 0.058* | |
H222 | 0.4798 | 0.2588 | 0.8566 | 0.058* | |
C23 | 0.3262 (3) | 0.1631 (2) | 0.9849 (2) | 0.0423 (5) | |
C24 | 0.3844 (4) | 0.1675 (3) | 1.0962 (3) | 0.0563 (6) | |
H241 | 0.4594 | 0.2183 | 1.0883 | 0.068* | |
C25 | 0.3348 (4) | 0.0959 (3) | 1.2180 (3) | 0.0658 (8) | |
H251 | 0.3758 | 0.1010 | 1.2910 | 0.079* | |
C26 | 0.2275 (4) | 0.0170 (3) | 1.2299 (3) | 0.0629 (7) | |
H261 | 0.1933 | −0.0309 | 1.3131 | 0.075* | |
C27 | 0.1682 (4) | 0.0116 (3) | 1.1200 (3) | 0.0606 (7) | |
H271 | 0.0944 | −0.0426 | 1.1291 | 0.073* | |
C28 | 0.2175 (3) | 0.0838 (3) | 0.9975 (2) | 0.0496 (5) | |
H281 | 0.1822 | 0.0763 | 0.9236 | 0.059* | |
Cl1 | 0.19840 (7) | 0.07672 (7) | 0.62088 (5) | 0.0459 (2) | |
O1A | 0.0878 (13) | 0.0586 (10) | 0.5438 (9) | 0.071 (2) | 0.66 (3) |
O2A | 0.2349 (11) | −0.0512 (9) | 0.7360 (6) | 0.0630 (17) | 0.66 (3) |
O3A | 0.1333 (19) | 0.2126 (12) | 0.6492 (15) | 0.095 (4) | 0.66 (3) |
O4A | 0.3513 (9) | 0.0646 (13) | 0.5527 (11) | 0.086 (3) | 0.66 (3) |
O1B | 0.122 (3) | 0.082 (3) | 0.510 (2) | 0.101 (7) | 0.34 (3) |
O2B | 0.190 (4) | −0.047 (2) | 0.724 (2) | 0.105 (6) | 0.34 (3) |
O3B | 0.099 (2) | 0.2007 (17) | 0.660 (2) | 0.064 (4) | 0.34 (3) |
O4B | 0.3506 (16) | 0.098 (2) | 0.585 (2) | 0.080 (3) | 0.34 (3) |
Cl2 | −0.23663 (8) | 0.44332 (8) | 0.79535 (8) | 0.0570 (2) | |
O5 | −0.2245 (5) | 0.5724 (5) | 0.6812 (5) | 0.1421 (15) | |
O6 | −0.3698 (4) | 0.5028 (5) | 0.8630 (4) | 0.1273 (13) | |
O7 | −0.2735 (4) | 0.3526 (4) | 0.7389 (3) | 0.0951 (9) | |
O8 | −0.0873 (3) | 0.3889 (4) | 0.8630 (3) | 0.0991 (10) | |
O9 | 0.4548 (3) | −0.2670 (3) | 0.5678 (3) | 0.0757 (7) | |
H91 | 0.4625 | −0.1874 | 0.5194 | 0.114* | |
H92 | 0.5408 | −0.3200 | 0.6072 | 0.114* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N16 | 0.0336 (8) | 0.0422 (9) | 0.0420 (9) | −0.0174 (7) | 0.0030 (7) | −0.0149 (7) |
N19 | 0.0463 (11) | 0.0441 (10) | 0.0544 (11) | −0.0149 (8) | −0.0041 (9) | −0.0050 (8) |
C17 | 0.0433 (11) | 0.0430 (10) | 0.0421 (10) | −0.0128 (9) | −0.0001 (8) | −0.0181 (9) |
C18 | 0.0464 (12) | 0.0436 (11) | 0.0537 (12) | −0.0111 (9) | 0.0049 (10) | −0.0162 (10) |
C20 | 0.0661 (17) | 0.0639 (15) | 0.0410 (11) | −0.0303 (13) | −0.0058 (11) | −0.0096 (10) |
C21 | 0.0606 (15) | 0.0569 (14) | 0.0429 (11) | −0.0285 (12) | 0.0128 (10) | −0.0222 (10) |
C22 | 0.0369 (10) | 0.0437 (11) | 0.0629 (14) | −0.0112 (9) | 0.0065 (10) | −0.0200 (10) |
C23 | 0.0362 (10) | 0.0365 (9) | 0.0527 (11) | −0.0076 (8) | −0.0031 (9) | −0.0154 (8) |
C24 | 0.0560 (14) | 0.0472 (12) | 0.0656 (15) | −0.0145 (11) | −0.0176 (12) | −0.0147 (11) |
C25 | 0.077 (2) | 0.0540 (15) | 0.0563 (15) | −0.0025 (14) | −0.0229 (14) | −0.0163 (12) |
C26 | 0.0640 (17) | 0.0517 (14) | 0.0544 (14) | −0.0049 (12) | 0.0031 (12) | −0.0081 (11) |
C27 | 0.0546 (15) | 0.0554 (14) | 0.0694 (17) | −0.0229 (12) | 0.0045 (13) | −0.0132 (13) |
C28 | 0.0476 (12) | 0.0539 (13) | 0.0515 (12) | −0.0201 (10) | −0.0020 (10) | −0.0177 (10) |
Cl1 | 0.0433 (3) | 0.0519 (3) | 0.0484 (3) | −0.0204 (2) | −0.0019 (2) | −0.0177 (2) |
O1A | 0.079 (4) | 0.062 (3) | 0.078 (3) | −0.032 (3) | −0.033 (3) | −0.010 (3) |
O2A | 0.073 (4) | 0.065 (3) | 0.044 (2) | −0.030 (2) | −0.007 (2) | 0.0004 (17) |
O3A | 0.123 (8) | 0.077 (4) | 0.112 (6) | −0.038 (4) | −0.016 (5) | −0.050 (4) |
O4A | 0.074 (3) | 0.085 (5) | 0.088 (5) | −0.039 (3) | 0.015 (3) | −0.005 (3) |
O1B | 0.088 (10) | 0.134 (16) | 0.104 (11) | −0.017 (9) | −0.025 (9) | −0.078 (10) |
O2B | 0.130 (15) | 0.093 (10) | 0.125 (12) | −0.088 (11) | 0.070 (9) | −0.047 (8) |
O3B | 0.060 (6) | 0.054 (5) | 0.071 (6) | 0.003 (5) | −0.005 (4) | −0.029 (5) |
O4B | 0.060 (5) | 0.094 (7) | 0.116 (9) | −0.047 (5) | 0.029 (5) | −0.057 (7) |
Cl2 | 0.0410 (3) | 0.0587 (4) | 0.0838 (5) | −0.0185 (3) | −0.0003 (3) | −0.0358 (3) |
O5 | 0.122 (3) | 0.127 (3) | 0.160 (3) | −0.076 (2) | −0.022 (2) | 0.018 (2) |
O6 | 0.0690 (18) | 0.192 (3) | 0.159 (3) | −0.029 (2) | 0.0164 (18) | −0.120 (3) |
O7 | 0.111 (2) | 0.112 (2) | 0.1031 (19) | −0.0633 (19) | 0.0164 (17) | −0.0613 (18) |
O8 | 0.0527 (14) | 0.133 (3) | 0.103 (2) | −0.0300 (15) | −0.0070 (13) | −0.0256 (19) |
O9 | 0.0635 (14) | 0.0607 (12) | 0.1013 (17) | −0.0305 (11) | 0.0107 (12) | −0.0167 (12) |
N16—C21 | 1.491 (3) | C24—C25 | 1.377 (4) |
N16—C17 | 1.499 (3) | C24—H241 | 0.9313 |
N16—C22 | 1.519 (3) | C25—C26 | 1.379 (5) |
N16—H161 | 0.8954 | C25—H251 | 0.9269 |
N19—C18 | 1.486 (3) | C26—C27 | 1.374 (5) |
N19—C20 | 1.498 (4) | C26—H261 | 0.9388 |
N19—H191 | 0.8898 | C27—C28 | 1.384 (4) |
N19—H192 | 0.8904 | C27—H271 | 0.9459 |
C17—C18 | 1.510 (3) | C28—H281 | 0.9242 |
C17—H171 | 0.9685 | Cl1—O2B | 1.382 (12) |
C17—H172 | 0.9713 | Cl1—O4B | 1.398 (11) |
C18—H181 | 0.9500 | Cl1—O1B | 1.409 (12) |
C18—H182 | 0.9681 | Cl1—O3A | 1.416 (8) |
C20—C21 | 1.503 (4) | Cl1—O2A | 1.427 (5) |
C20—H201 | 0.9532 | Cl1—O3B | 1.430 (10) |
C20—H202 | 0.9768 | Cl1—O1A | 1.430 (6) |
C21—H211 | 0.9671 | Cl1—O4A | 1.437 (7) |
C21—H212 | 0.9645 | Cl2—O6 | 1.374 (3) |
C22—C23 | 1.500 (3) | Cl2—O7 | 1.386 (3) |
C22—H221 | 0.9721 | Cl2—O8 | 1.405 (3) |
C22—H222 | 0.9695 | Cl2—O5 | 1.484 (4) |
C23—C24 | 1.380 (3) | O9—H91 | 0.8131 |
C23—C28 | 1.390 (3) | O9—H92 | 0.8189 |
C21—N16—C17 | 109.70 (17) | N16—C22—H222 | 108.0 |
C21—N16—C22 | 110.81 (18) | H221—C22—H222 | 108.4 |
C17—N16—C22 | 111.48 (17) | C24—C23—C28 | 118.9 (2) |
C21—N16—H161 | 107.9 | C24—C23—C22 | 121.7 (2) |
C17—N16—H161 | 109.9 | C28—C23—C22 | 119.3 (2) |
C22—N16—H161 | 107.0 | C25—C24—C23 | 120.8 (3) |
C18—N19—C20 | 110.79 (19) | C25—C24—H241 | 120.0 |
C18—N19—H191 | 110.7 | C23—C24—H241 | 119.2 |
C20—N19—H191 | 110.0 | C24—C25—C26 | 120.0 (3) |
C18—N19—H192 | 110.1 | C24—C25—H251 | 118.8 |
C20—N19—H192 | 109.1 | C26—C25—H251 | 121.1 |
H191—N19—H192 | 106.1 | C27—C26—C25 | 119.9 (3) |
N16—C17—C18 | 111.57 (19) | C27—C26—H261 | 120.3 |
N16—C17—H171 | 108.2 | C25—C26—H261 | 119.7 |
C18—C17—H171 | 109.2 | C26—C27—C28 | 120.1 (3) |
N16—C17—H172 | 108.2 | C26—C27—H271 | 119.3 |
C18—C17—H172 | 110.4 | C28—C27—H271 | 120.5 |
H171—C17—H172 | 109.2 | C27—C28—C23 | 120.2 (2) |
N19—C18—C17 | 111.1 (2) | C27—C28—H281 | 120.4 |
N19—C18—H181 | 107.3 | C23—C28—H281 | 119.4 |
C17—C18—H181 | 111.0 | O2B—Cl1—O4B | 119.3 (15) |
N19—C18—H182 | 108.7 | O2B—Cl1—O1B | 109.0 (11) |
C17—C18—H182 | 109.9 | O4B—Cl1—O1B | 109.0 (12) |
H181—C18—H182 | 108.7 | O3A—Cl1—O2A | 112.5 (8) |
N19—C20—C21 | 110.0 (2) | O2B—Cl1—O3B | 104.2 (14) |
N19—C20—H201 | 110.1 | O4B—Cl1—O3B | 107.6 (11) |
C21—C20—H201 | 108.4 | O1B—Cl1—O3B | 107.0 (13) |
N19—C20—H202 | 110.0 | O3A—Cl1—O1A | 111.9 (7) |
C21—C20—H202 | 108.6 | O2A—Cl1—O1A | 107.1 (4) |
H201—C20—H202 | 109.7 | O3A—Cl1—O4A | 112.7 (6) |
N16—C21—C20 | 111.0 (2) | O2A—Cl1—O4A | 104.5 (5) |
N16—C21—H211 | 109.0 | O1A—Cl1—O4A | 107.8 (6) |
C20—C21—H211 | 110.0 | O6—Cl2—O7 | 109.7 (2) |
N16—C21—H212 | 109.1 | O6—Cl2—O8 | 114.0 (2) |
C20—C21—H212 | 110.5 | O7—Cl2—O8 | 118.4 (2) |
H211—C21—H212 | 107.1 | O6—Cl2—O5 | 104.5 (3) |
C23—C22—N16 | 111.90 (18) | O7—Cl2—O5 | 103.1 (2) |
C23—C22—H221 | 109.6 | O8—Cl2—O5 | 105.4 (2) |
N16—C22—H221 | 108.8 | H91—O9—H92 | 111.3 |
C23—C22—H222 | 110.1 |
D—H···A | D—H | H···A | D···A | D—H···A |
O9—H91···O4Ai | 0.81 | 2.27 | 2.942 (11) | 141 |
O9—H92···O5ii | 0.82 | 2.06 | 2.869 (6) | 170 |
N16—H161···O8 | 0.90 | 2.15 | 2.964 (3) | 151 |
N19—H191···O9iii | 0.89 | 1.92 | 2.750 (4) | 155 |
N19—H192···O1Aiv | 0.89 | 2.08 | 2.907 (10) | 154 |
C17—H172···O6v | 0.97 | 2.48 | 3.446 (5) | 172 |
C20—H201···O7iv | 0.95 | 2.49 | 3.406 (4) | 160 |
C21—H212···O3A | 0.96 | 2.48 | 3.130 (15) | 125 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) x+1, y−1, z; (iii) x, y+1, z; (iv) −x, −y+1, −z+1; (v) x+1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C11H18N22+·2ClO4−·H2O |
Mr | 395.19 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 8.6632 (6), 10.0197 (8), 10.8831 (7) |
α, β, γ (°) | 70.184 (7), 83.946 (6), 70.560 (7) |
V (Å3) | 838.05 (12) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.44 |
Crystal size (mm) | 0.53 × 0.40 × 0.25 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur Atlas Gemini ultra diffractometer |
Absorption correction | Analytical (CrysAlis PRO; Oxford Diffraction, 2006) |
Tmin, Tmax | 0.832, 0.907 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 32031, 5885, 3882 |
Rint | 0.045 |
(sin θ/λ)max (Å−1) | 0.765 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.066, 0.240, 1.12 |
No. of reflections | 5885 |
No. of parameters | 255 |
No. of restraints | 40 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.04, −0.88 |
Computer programs: CrysAlis PRO (Oxford Diffraction, 2006), SIR97 (Altomare et al., 1999), SHELXL97 (Sheldrick, 2008), CAMERON (Watkin et al., 1996).
D—H···A | D—H | H···A | D···A | D—H···A |
O9—H91···O4Ai | 0.81 | 2.27 | 2.942 (11) | 141 |
O9—H92···O5ii | 0.82 | 2.06 | 2.869 (6) | 170 |
N16—H161···O8 | 0.90 | 2.15 | 2.964 (3) | 151 |
N19—H191···O9iii | 0.89 | 1.92 | 2.750 (4) | 155 |
N19—H192···O1Aiv | 0.89 | 2.08 | 2.907 (10) | 154 |
C17—H172···O6v | 0.97 | 2.48 | 3.446 (5) | 172 |
C20—H201···O7iv | 0.95 | 2.49 | 3.406 (4) | 160 |
C21—H212···O3A | 0.96 | 2.48 | 3.130 (15) | 125 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) x+1, y−1, z; (iii) x, y+1, z; (iv) −x, −y+1, −z+1; (v) x+1, y, z. |
Acknowledgements
We acknowledge support by the Secretary of State for Scientific Research and Technology of Tunisia.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Chemists and physicists of the solid state have shown an increasing interest in the study of perchlorate salts containing organic cations in recent years owing to their great interesting properties such as ferroelectric and dielectric behaviours. (Czarnecki et al., 1994; Czupinski et al., 2002; Czupinski et al., 2006). Here, we report the synthesis and the crystal structure of the title compound (I), [C11H18N2]2+.2ClO4-.H2O.
The crystal structure of (I) (Fig.1), contains two ClO4- anions, a 1-benzylpiperazine-1,4-diium dication and a water molecule. In its atomic arrangement, the ClO4- anions are associated per pair via O—H···O hydrogen bonds generated by a water molecule to form [Cl2O8H2O]2- entities. The 1-benzylpiperazine-1,4-diium dications are associated to these entities and connected them through N—H···O and C—H···O hydrogen bonds, leading to the formation of three dimensional network. As expected, the ClO4 anion has typical tetrahedral geometry where the Cl—O bond lengths and O—Cl—O angles are not equal to one another but very with the environment around the O atoms. In the title compound, the Cl—O bond lengths vary from 1.382 (12) Å to 1.437 (7) Å for Cl1O4 anion and from 1.374 (3) Å to 1.484 (4) Å for Cl2O4anion. The O—Cl—O angles range from 104.2 (14) ° to 119.3 (15) ° for the first anion and from 103.1 (2) °. to 118.4 (2) ° for the second one. These values clearly indicate that the coordination geometry of the Cl atom can be regarded as being a distorted tetrahedron. However, for Cl2O4 tetrahedron all the oxygen atoms are involved in hydrogen bonds, while only three oxygen atoms acts as acceptors of hydrogen bonds for the Cl1O4 tetrahedron.