organic compounds
4-[Bis(4-fluorophenyl)methyl]piperazin-1-ium bis(trichloroacetate) 0.4-hydrate
aDepartment of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India, and bDepartment Chemie, Fakultät für Naturwissenschaften, Universität Paderborn, Warburgerstr. 100, D-33098 Paderborn, Germany
*Correspondence e-mail: ulrich.floerke@upb.de
The title compound, C17H20F2N22+·2C2Cl3O2−·0.4H2O, has twofold protonated N atoms. The trichloroacetate anions each show one disordered Cl atom with site occupation factors of 0.945 (7):0.055 (7) 0.945 (8):0.055 (8). In the crystal, N—H⋯O, O(water)—H⋯O and O(water)—H⋯F interactions connect the components into a three-dimensional network.
Related literature
For the biological activity of piperazines, see: Bogatcheva et al. (2006); Brockunier et al. (2004). For a review pharmacological and toxicological information for piperazine derivatives, see: Elliott, (2011). For related structures, see: Betz et al. (2011, 2011a); Perpétuo & Janczak (2006). For graph-set analysis of hydrogen bonds, see: Bernstein et al. (1995); Etter et al. (1990). For puckering analysis, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2002); cell SAINT (Bruker, 2002); 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 and local programs.
Supporting information
10.1107/S1600536812009282/zj2061sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812009282/zj2061Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812009282/zj2061Isup3.cml
4,4'-Difluorobenzhydryl piperazine was obtained from R. L. Fine Chem., Bengaluru, India. 4,4'-Difluorobenzhydryl piperazine (2.88 g, 0.01 mol) and trichloroacetic acid (1.63 g, 0.01 mol) were dissolved in hot ethanol solution and stirred over a heating magnetic stirrer for few minutes (330 K). The resulting solution was allowed to cool slowly at room temperature. X-ray quality crystals of the title compound were obtained by the slow evaporation of ethanol (m.p.: 388–393 K).
H atoms were clearly identified in difference syntheses, idealized and refined riding on the carbon atoms with C—H = 0.95 (aromatic) - 1.00 Å, N—H = 0.92 - 0.93 Å and with isotropic displacement parameters Uiso(H) = 1.2U(C/Neq). Water H atoms were refined freely with DFIX O—H 0.84 (1) and DFIX H···H 1.4 (1) Å.
A review on the current pharmacological and toxicological information for piperazine derivatives is described (Elliott, 2011). 4,4'-Difluorobenzhydryl piperazine is an intermediate for the preparation of flunarizine which is a calcium channel blocker. Piperazines are among the most important building blocks in today's drug discovery and are found in biologically active compounds across a number of different therapeutic areas (Brockunier et al., 2004; Bogatcheva et al., 2006). Recently, we have reported the crystal structures of 4-[bis(4-fluorophenyl)methyl]piperazin-1-ium 2-(2-phenylethyl)benzoate (Betz et al., 2011) and 4-[bis(4-fluorophenyl) methyl]piperazin-1-ium picrate (Betz et al., 2011a). The crystal structures of melaminium bis(trifluoroacetate) trihydrate and melaminium bis(trichloroacetate) dihydrate have been reported (Perpétuo & Janczak, 2006). In the course of our studies on the salts of piperazines and in view of the importance of piperazines, we now report the crystal and molecular structure of the title salt. The presence of water in the crystal may be due to moisture from trichloroacetic acid. The water is part of intermolecular N—H···O, O(water)—H···O and O(water)—H···F interactions of the crystal packing (Figure 2 and Table 1). The molecular structure exhibits no unusual geometries. Both fluoro-phenyl rings form a dihedral angle of 68.64 (6)°, and each one chloro ligand of the two anions is disordered over two positions Cl31/Cl32 and Cl51/Cl52 with 0.945 (8)/0.055 (8) occupation.
For the biological activity of piperazines, see: Bogatcheva et al. (2006); Brockunier et al. (2004). For a review pharmacological and toxicological information for piperazine derivatives, see: Elliott, (2011). For related structures, see: Betz et al. (2011, 2011a); Perpétuo & Janczak (2006). For graph-set analysis of hydrogen bonds, see: Bernstein et al. (1995); Etter et al. (1990). For puckering analysis, see: Cremer & Pople (1975).
Data collection: SMART (Bruker, 2002); cell
SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); 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) and local programs.Fig. 1. Molecular structure with displacement ellipsoids drawn at the 50% probability level. | |
Fig. 2. Crystal packing viewed along [001] with H bonding as dotted lines. Hydrogen atoms not involved are omitted. |
C17H20F2N22+·2C2Cl3O2−·0.4H2O | F(000) = 1264 |
Mr = 622.30 | Dx = 1.563 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 6364 reflections |
a = 8.8101 (7) Å | θ = 2.4–28.1° |
b = 33.555 (3) Å | µ = 0.70 mm−1 |
c = 9.4453 (7) Å | T = 130 K |
β = 108.723 (2)° | Block, colourless |
V = 2644.5 (3) Å3 | 0.43 × 0.25 × 0.23 mm |
Z = 4 |
Bruker SMART APEX diffractometer | 6309 independent reflections |
Radiation source: sealed tube | 5475 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.033 |
φ and ω scans | θmax = 27.9°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | h = −11→11 |
Tmin = 0.754, Tmax = 0.856 | k = −44→35 |
25025 measured reflections | l = −12→12 |
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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.094 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.12 | w = 1/[σ2(Fo2) + (0.0376P)2 + 1.238P] where P = (Fo2 + 2Fc2)/3 |
6309 reflections | (Δ/σ)max < 0.001 |
343 parameters | Δρmax = 0.44 e Å−3 |
5 restraints | Δρmin = −0.33 e Å−3 |
C17H20F2N22+·2C2Cl3O2−·0.4H2O | V = 2644.5 (3) Å3 |
Mr = 622.30 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 8.8101 (7) Å | µ = 0.70 mm−1 |
b = 33.555 (3) Å | T = 130 K |
c = 9.4453 (7) Å | 0.43 × 0.25 × 0.23 mm |
β = 108.723 (2)° |
Bruker SMART APEX diffractometer | 6309 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | 5475 reflections with I > 2σ(I) |
Tmin = 0.754, Tmax = 0.856 | Rint = 0.033 |
25025 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 5 restraints |
wR(F2) = 0.094 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.12 | Δρmax = 0.44 e Å−3 |
6309 reflections | Δρmin = −0.33 e Å−3 |
343 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 | Occ. (<1) | |
Cl1 | 0.42896 (7) | 0.08738 (2) | 0.57017 (6) | 0.04709 (17) | |
Cl2 | 0.73291 (7) | 0.122760 (16) | 0.73174 (6) | 0.03824 (14) | |
Cl31 | 0.7180 (2) | 0.039699 (19) | 0.66377 (16) | 0.0288 (3) | 0.945 (7) |
Cl32 | 0.655 (3) | 0.0375 (3) | 0.625 (2) | 0.030 (3)* | 0.055 (7) |
O1 | 0.57723 (16) | 0.09907 (4) | 0.94355 (15) | 0.0257 (3) | |
O2 | 0.51880 (15) | 0.03603 (4) | 0.86531 (14) | 0.0218 (3) | |
C1 | 0.6146 (2) | 0.07955 (6) | 0.71377 (19) | 0.0210 (4) | |
C2 | 0.5687 (2) | 0.07066 (5) | 0.85888 (19) | 0.0183 (3) | |
Cl4 | 1.04646 (6) | 0.05481 (2) | 0.43723 (6) | 0.04426 (16) | |
Cl51 | 0.7926 (3) | 0.11414 (3) | 0.3445 (2) | 0.0353 (4) | 0.945 (9) |
Cl52 | 0.852 (3) | 0.1118 (3) | 0.385 (2) | 0.030 (4)* | 0.055 (9) |
Cl6 | 0.72048 (5) | 0.031251 (14) | 0.28437 (5) | 0.02344 (11) | |
O3 | 0.97280 (16) | 0.10468 (4) | 0.13520 (15) | 0.0243 (3) | |
O4 | 0.89212 (15) | 0.04212 (4) | 0.06973 (14) | 0.0210 (3) | |
C3 | 0.8647 (2) | 0.06867 (6) | 0.29606 (19) | 0.0209 (4) | |
C4 | 0.9108 (2) | 0.07214 (5) | 0.14910 (19) | 0.0175 (3) | |
F1 | 0.47404 (19) | 0.21857 (4) | 0.64013 (15) | 0.0531 (4) | |
F2 | −0.14523 (17) | 0.26032 (4) | −0.34231 (15) | 0.0443 (3) | |
N1 | 0.22837 (17) | 0.11350 (4) | 0.04351 (15) | 0.0163 (3) | |
H1B | 0.1356 | 0.1125 | 0.0701 | 0.020* | |
N2 | 0.26897 (17) | 0.03018 (4) | −0.02096 (16) | 0.0176 (3) | |
H2A | 0.2369 | 0.0040 | −0.0286 | 0.021* | |
H2B | 0.3617 | 0.0318 | −0.0457 | 0.021* | |
C10 | 0.2875 (2) | 0.15637 (5) | 0.05572 (19) | 0.0193 (4) | |
H1A | 0.3867 | 0.1565 | 0.0260 | 0.023* | |
C11 | 0.3345 (2) | 0.17165 (5) | 0.2157 (2) | 0.0224 (4) | |
C12 | 0.2363 (3) | 0.16824 (6) | 0.3048 (2) | 0.0265 (4) | |
H12A | 0.1357 | 0.1551 | 0.2669 | 0.032* | |
C13 | 0.2841 (3) | 0.18384 (6) | 0.4487 (2) | 0.0328 (5) | |
H13A | 0.2180 | 0.1812 | 0.5103 | 0.039* | |
C14 | 0.4278 (3) | 0.20306 (6) | 0.4998 (2) | 0.0353 (5) | |
C15 | 0.5268 (3) | 0.20753 (7) | 0.4159 (2) | 0.0399 (5) | |
H15A | 0.6257 | 0.2213 | 0.4543 | 0.048* | |
C16 | 0.4798 (3) | 0.19138 (6) | 0.2723 (2) | 0.0325 (5) | |
H16A | 0.5480 | 0.1939 | 0.2127 | 0.039* | |
C21 | 0.1666 (2) | 0.18308 (5) | −0.05342 (19) | 0.0205 (4) | |
C22 | 0.0095 (2) | 0.18688 (6) | −0.0532 (2) | 0.0242 (4) | |
H22A | −0.0256 | 0.1716 | 0.0151 | 0.029* | |
C23 | −0.0966 (2) | 0.21262 (6) | −0.1512 (2) | 0.0282 (4) | |
H23A | −0.2040 | 0.2152 | −0.1513 | 0.034* | |
C24 | −0.0419 (3) | 0.23440 (6) | −0.2483 (2) | 0.0294 (4) | |
C25 | 0.1114 (3) | 0.23131 (6) | −0.2544 (2) | 0.0321 (5) | |
H25A | 0.1449 | 0.2466 | −0.3237 | 0.039* | |
C26 | 0.2160 (2) | 0.20519 (6) | −0.1560 (2) | 0.0270 (4) | |
H26A | 0.3223 | 0.2023 | −0.1586 | 0.032* | |
C32 | 0.1905 (2) | 0.09844 (5) | −0.11400 (18) | 0.0185 (3) | |
H32A | 0.2858 | 0.1017 | −0.1468 | 0.022* | |
H32B | 0.1023 | 0.1145 | −0.1812 | 0.022* | |
C33 | 0.1419 (2) | 0.05501 (5) | −0.12607 (19) | 0.0192 (4) | |
H33A | 0.0407 | 0.0520 | −0.1028 | 0.023* | |
H33B | 0.1230 | 0.0457 | −0.2297 | 0.023* | |
C35 | 0.3000 (2) | 0.04431 (5) | 0.13512 (19) | 0.0179 (3) | |
H35A | 0.3842 | 0.0276 | 0.2045 | 0.022* | |
H35B | 0.2012 | 0.0418 | 0.1628 | 0.022* | |
C36 | 0.3534 (2) | 0.08726 (5) | 0.14877 (18) | 0.0175 (3) | |
H36A | 0.3733 | 0.0964 | 0.2528 | 0.021* | |
H36B | 0.4551 | 0.0895 | 0.1258 | 0.021* | |
O100 | 0.6383 (5) | 0.17843 (13) | 0.9984 (5) | 0.0411 (15) | 0.398 (5) |
H101 | 0.636 (11) | 0.1549 (10) | 0.968 (10) | 0.10 (3)* | 0.398 (5) |
H102 | 0.720 (7) | 0.181 (3) | 1.075 (6) | 0.10 (3)* | 0.398 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0302 (3) | 0.0767 (5) | 0.0258 (3) | 0.0066 (3) | −0.0029 (2) | 0.0160 (3) |
Cl2 | 0.0497 (3) | 0.0321 (3) | 0.0420 (3) | −0.0160 (2) | 0.0275 (3) | −0.0024 (2) |
Cl31 | 0.0361 (8) | 0.0300 (3) | 0.0275 (5) | 0.0028 (3) | 0.0201 (5) | 0.0011 (2) |
O1 | 0.0276 (7) | 0.0258 (7) | 0.0278 (7) | −0.0033 (6) | 0.0146 (6) | −0.0041 (6) |
O2 | 0.0204 (6) | 0.0216 (7) | 0.0260 (7) | −0.0008 (5) | 0.0112 (5) | 0.0021 (5) |
C1 | 0.0198 (9) | 0.0241 (9) | 0.0185 (8) | −0.0009 (7) | 0.0054 (7) | 0.0033 (7) |
C2 | 0.0113 (8) | 0.0248 (9) | 0.0187 (8) | 0.0028 (7) | 0.0046 (6) | 0.0042 (7) |
Cl4 | 0.0244 (3) | 0.0773 (5) | 0.0237 (3) | −0.0059 (3) | −0.0027 (2) | 0.0090 (3) |
Cl51 | 0.0431 (9) | 0.0314 (3) | 0.0402 (7) | −0.0065 (4) | 0.0258 (7) | −0.0164 (3) |
Cl6 | 0.0226 (2) | 0.0282 (2) | 0.0228 (2) | −0.00551 (18) | 0.01187 (17) | −0.00174 (17) |
O3 | 0.0247 (7) | 0.0210 (7) | 0.0316 (7) | −0.0053 (5) | 0.0150 (6) | −0.0038 (5) |
O4 | 0.0218 (6) | 0.0214 (7) | 0.0223 (6) | −0.0044 (5) | 0.0105 (5) | −0.0046 (5) |
C3 | 0.0182 (9) | 0.0271 (10) | 0.0181 (8) | −0.0036 (7) | 0.0066 (7) | −0.0044 (7) |
C4 | 0.0114 (8) | 0.0224 (9) | 0.0190 (8) | 0.0009 (6) | 0.0054 (6) | 0.0009 (7) |
F1 | 0.0701 (10) | 0.0504 (9) | 0.0271 (7) | −0.0105 (7) | −0.0008 (7) | −0.0165 (6) |
F2 | 0.0456 (8) | 0.0331 (7) | 0.0419 (8) | 0.0057 (6) | −0.0030 (6) | 0.0182 (6) |
N1 | 0.0174 (7) | 0.0155 (7) | 0.0165 (7) | −0.0002 (6) | 0.0064 (6) | 0.0003 (5) |
N2 | 0.0179 (7) | 0.0153 (7) | 0.0208 (7) | −0.0008 (6) | 0.0079 (6) | −0.0005 (6) |
C10 | 0.0200 (9) | 0.0169 (9) | 0.0204 (8) | −0.0036 (7) | 0.0056 (7) | 0.0006 (7) |
C11 | 0.0269 (10) | 0.0155 (9) | 0.0202 (9) | −0.0002 (7) | 0.0010 (7) | 0.0013 (7) |
C12 | 0.0321 (11) | 0.0215 (10) | 0.0237 (9) | −0.0024 (8) | 0.0056 (8) | −0.0034 (7) |
C13 | 0.0456 (13) | 0.0256 (11) | 0.0258 (10) | 0.0017 (9) | 0.0093 (9) | −0.0031 (8) |
C14 | 0.0500 (14) | 0.0236 (10) | 0.0224 (10) | −0.0005 (9) | −0.0022 (9) | −0.0050 (8) |
C15 | 0.0400 (13) | 0.0356 (13) | 0.0322 (11) | −0.0140 (10) | −0.0048 (10) | −0.0046 (9) |
C16 | 0.0317 (11) | 0.0310 (11) | 0.0302 (11) | −0.0079 (9) | 0.0036 (9) | 0.0012 (8) |
C21 | 0.0254 (9) | 0.0156 (9) | 0.0185 (8) | −0.0034 (7) | 0.0042 (7) | −0.0020 (7) |
C22 | 0.0277 (10) | 0.0205 (9) | 0.0238 (9) | 0.0005 (8) | 0.0072 (8) | 0.0033 (7) |
C23 | 0.0282 (10) | 0.0241 (10) | 0.0288 (10) | 0.0016 (8) | 0.0042 (8) | 0.0002 (8) |
C24 | 0.0374 (12) | 0.0177 (9) | 0.0244 (9) | 0.0003 (8) | −0.0023 (8) | 0.0039 (7) |
C25 | 0.0421 (12) | 0.0237 (10) | 0.0282 (10) | −0.0063 (9) | 0.0082 (9) | 0.0074 (8) |
C26 | 0.0306 (11) | 0.0232 (10) | 0.0257 (10) | −0.0050 (8) | 0.0068 (8) | 0.0029 (8) |
C32 | 0.0201 (9) | 0.0208 (9) | 0.0144 (8) | 0.0016 (7) | 0.0053 (7) | −0.0001 (6) |
C33 | 0.0171 (8) | 0.0212 (9) | 0.0184 (8) | 0.0002 (7) | 0.0047 (7) | −0.0010 (7) |
C35 | 0.0179 (8) | 0.0189 (9) | 0.0183 (8) | 0.0011 (7) | 0.0076 (7) | 0.0006 (6) |
C36 | 0.0176 (8) | 0.0183 (9) | 0.0158 (8) | 0.0019 (7) | 0.0041 (7) | 0.0011 (6) |
O100 | 0.045 (3) | 0.034 (2) | 0.051 (3) | −0.0121 (19) | 0.025 (2) | −0.0149 (19) |
Cl1—C1 | 1.7777 (19) | C12—C13 | 1.390 (3) |
Cl2—C1 | 1.7616 (19) | C12—H12A | 0.9500 |
Cl31—Cl32 | 0.56 (3) | C13—C14 | 1.364 (3) |
Cl31—C1 | 1.766 (2) | C13—H13A | 0.9500 |
Cl32—C1 | 1.733 (11) | C14—C15 | 1.362 (3) |
O1—C2 | 1.231 (2) | C15—C16 | 1.394 (3) |
O2—C2 | 1.251 (2) | C15—H15A | 0.9500 |
C1—C2 | 1.577 (2) | C16—H16A | 0.9500 |
Cl4—C3 | 1.7852 (19) | C21—C22 | 1.391 (3) |
Cl51—Cl52 | 0.55 (3) | C21—C26 | 1.396 (3) |
Cl51—C3 | 1.768 (2) | C22—C23 | 1.386 (3) |
Cl52—C3 | 1.696 (11) | C22—H22A | 0.9500 |
Cl6—C3 | 1.7646 (19) | C23—C24 | 1.375 (3) |
O3—C4 | 1.246 (2) | C23—H23A | 0.9500 |
O4—C4 | 1.235 (2) | C24—C25 | 1.373 (3) |
C3—C4 | 1.571 (2) | C25—C26 | 1.389 (3) |
F1—C14 | 1.359 (2) | C25—H25A | 0.9500 |
F2—C24 | 1.362 (2) | C26—H26A | 0.9500 |
N1—C32 | 1.504 (2) | C32—C33 | 1.513 (2) |
N1—C36 | 1.508 (2) | C32—H32A | 0.9900 |
N1—C10 | 1.522 (2) | C32—H32B | 0.9900 |
N1—H1B | 0.9300 | C33—H33A | 0.9900 |
N2—C35 | 1.488 (2) | C33—H33B | 0.9900 |
N2—C33 | 1.490 (2) | C35—C36 | 1.508 (2) |
N2—H2A | 0.9200 | C35—H35A | 0.9900 |
N2—H2B | 0.9200 | C35—H35B | 0.9900 |
C10—C21 | 1.515 (2) | C36—H36A | 0.9900 |
C10—C11 | 1.522 (2) | C36—H36B | 0.9900 |
C10—H1A | 1.0000 | O100—H101 | 0.840 (10) |
C11—C16 | 1.387 (3) | O100—H102 | 0.839 (10) |
C11—C12 | 1.392 (3) | ||
Cl32—Cl31—C1 | 77.4 (11) | C14—C13—H13A | 120.7 |
Cl31—Cl32—C1 | 84.0 (13) | C12—C13—H13A | 120.7 |
C2—C1—Cl32 | 114.5 (4) | F1—C14—C15 | 118.6 (2) |
C2—C1—Cl2 | 112.39 (12) | F1—C14—C13 | 118.6 (2) |
Cl32—C1—Cl2 | 120.7 (7) | C15—C14—C13 | 122.8 (2) |
C2—C1—Cl31 | 112.80 (12) | C14—C15—C16 | 118.5 (2) |
Cl32—C1—Cl31 | 18.5 (9) | C14—C15—H15A | 120.7 |
Cl2—C1—Cl31 | 108.00 (11) | C16—C15—H15A | 120.7 |
C2—C1—Cl1 | 105.13 (12) | C11—C16—C15 | 120.7 (2) |
Cl32—C1—Cl1 | 91.9 (10) | C11—C16—H16A | 119.7 |
Cl2—C1—Cl1 | 108.84 (10) | C15—C16—H16A | 119.7 |
Cl31—C1—Cl1 | 109.59 (12) | C22—C21—C26 | 118.96 (17) |
O1—C2—O2 | 129.59 (16) | C22—C21—C10 | 122.39 (16) |
O1—C2—C1 | 116.02 (16) | C26—C21—C10 | 118.64 (17) |
O2—C2—C1 | 114.21 (15) | C23—C22—C21 | 120.93 (18) |
Cl52—Cl51—C3 | 73.5 (12) | C23—C22—H22A | 119.5 |
Cl51—Cl52—C3 | 88.5 (16) | C21—C22—H22A | 119.5 |
C4—C3—Cl52 | 116.9 (5) | C24—C23—C22 | 118.10 (19) |
C4—C3—Cl6 | 112.51 (12) | C24—C23—H23A | 120.9 |
Cl52—C3—Cl6 | 118.4 (7) | C22—C23—H23A | 120.9 |
C4—C3—Cl51 | 112.38 (13) | F2—C24—C25 | 118.79 (18) |
Cl52—C3—Cl51 | 18.0 (9) | F2—C24—C23 | 118.0 (2) |
Cl6—C3—Cl51 | 108.59 (11) | C25—C24—C23 | 123.19 (18) |
C4—C3—Cl4 | 104.78 (12) | C24—C25—C26 | 117.99 (19) |
Cl52—C3—Cl4 | 92.2 (10) | C24—C25—H25A | 121.0 |
Cl6—C3—Cl4 | 108.46 (10) | C26—C25—H25A | 121.0 |
Cl51—C3—Cl4 | 110.00 (13) | C25—C26—C21 | 120.81 (19) |
O4—C4—O3 | 128.92 (16) | C25—C26—H26A | 119.6 |
O4—C4—C3 | 117.01 (15) | C21—C26—H26A | 119.6 |
O3—C4—C3 | 113.85 (15) | N1—C32—C33 | 111.45 (14) |
C32—N1—C36 | 109.84 (13) | N1—C32—H32A | 109.3 |
C32—N1—C10 | 110.76 (13) | C33—C32—H32A | 109.3 |
C36—N1—C10 | 110.02 (13) | N1—C32—H32B | 109.3 |
C32—N1—H1B | 108.7 | C33—C32—H32B | 109.3 |
C36—N1—H1B | 108.7 | H32A—C32—H32B | 108.0 |
C10—N1—H1B | 108.7 | N2—C33—C32 | 110.77 (14) |
C35—N2—C33 | 110.00 (13) | N2—C33—H33A | 109.5 |
C35—N2—H2A | 109.7 | C32—C33—H33A | 109.5 |
C33—N2—H2A | 109.7 | N2—C33—H33B | 109.5 |
C35—N2—H2B | 109.7 | C32—C33—H33B | 109.5 |
C33—N2—H2B | 109.7 | H33A—C33—H33B | 108.1 |
H2A—N2—H2B | 108.2 | N2—C35—C36 | 110.01 (13) |
C21—C10—N1 | 111.04 (14) | N2—C35—H35A | 109.7 |
C21—C10—C11 | 112.61 (15) | C36—C35—H35A | 109.7 |
N1—C10—C11 | 111.79 (14) | N2—C35—H35B | 109.7 |
C21—C10—H1A | 107.0 | C36—C35—H35B | 109.7 |
N1—C10—H1A | 107.0 | H35A—C35—H35B | 108.2 |
C11—C10—H1A | 107.0 | N1—C36—C35 | 111.11 (14) |
C16—C11—C12 | 118.84 (18) | N1—C36—H36A | 109.4 |
C16—C11—C10 | 117.85 (18) | C35—C36—H36A | 109.4 |
C12—C11—C10 | 123.26 (17) | N1—C36—H36B | 109.4 |
C13—C12—C11 | 120.55 (19) | C35—C36—H36B | 109.4 |
C13—C12—H12A | 119.7 | H36A—C36—H36B | 108.0 |
C11—C12—H12A | 119.7 | H101—O100—H102 | 107 (7) |
C14—C13—C12 | 118.6 (2) | ||
Cl31—Cl32—C1—C2 | −88.9 (13) | C21—C10—C11—C12 | 75.9 (2) |
Cl31—Cl32—C1—Cl2 | 50.3 (14) | N1—C10—C11—C12 | −50.0 (2) |
Cl31—Cl32—C1—Cl1 | 163.5 (12) | C16—C11—C12—C13 | −0.9 (3) |
Cl32—Cl31—C1—C2 | 99.2 (13) | C10—C11—C12—C13 | −178.09 (18) |
Cl32—Cl31—C1—Cl2 | −135.9 (13) | C11—C12—C13—C14 | 1.0 (3) |
Cl32—Cl31—C1—Cl1 | −17.5 (13) | C12—C13—C14—F1 | 179.54 (19) |
Cl32—C1—C2—O1 | 163.1 (11) | C12—C13—C14—C15 | −0.2 (3) |
Cl2—C1—C2—O1 | 20.5 (2) | F1—C14—C15—C16 | 179.6 (2) |
Cl31—C1—C2—O1 | 142.94 (16) | C13—C14—C15—C16 | −0.7 (4) |
Cl1—C1—C2—O1 | −97.70 (16) | C12—C11—C16—C15 | 0.0 (3) |
Cl32—C1—C2—O2 | −21.3 (11) | C10—C11—C16—C15 | 177.33 (19) |
Cl2—C1—C2—O2 | −163.85 (13) | C14—C15—C16—C11 | 0.8 (3) |
Cl31—C1—C2—O2 | −41.5 (2) | N1—C10—C21—C22 | 57.6 (2) |
Cl1—C1—C2—O2 | 77.91 (16) | C11—C10—C21—C22 | −68.6 (2) |
Cl51—Cl52—C3—C4 | 79.5 (17) | N1—C10—C21—C26 | −123.58 (17) |
Cl51—Cl52—C3—Cl6 | −60.3 (15) | C11—C10—C21—C26 | 110.19 (19) |
Cl51—Cl52—C3—Cl4 | −172.7 (14) | C26—C21—C22—C23 | −1.0 (3) |
Cl52—Cl51—C3—C4 | −108.6 (16) | C10—C21—C22—C23 | 177.77 (17) |
Cl52—Cl51—C3—Cl6 | 126.3 (15) | C21—C22—C23—C24 | −0.2 (3) |
Cl52—Cl51—C3—Cl4 | 7.8 (15) | C22—C23—C24—F2 | −178.57 (17) |
Cl52—C3—C4—O4 | −167.2 (11) | C22—C23—C24—C25 | 1.2 (3) |
Cl6—C3—C4—O4 | −25.1 (2) | F2—C24—C25—C26 | 178.97 (18) |
Cl51—C3—C4—O4 | −148.05 (16) | C23—C24—C25—C26 | −0.8 (3) |
Cl4—C3—C4—O4 | 92.53 (16) | C24—C25—C26—C21 | −0.6 (3) |
Cl52—C3—C4—O3 | 17.7 (12) | C22—C21—C26—C25 | 1.4 (3) |
Cl6—C3—C4—O3 | 159.81 (13) | C10—C21—C26—C25 | −177.41 (17) |
Cl51—C3—C4—O3 | 36.9 (2) | C36—N1—C32—C33 | 54.54 (18) |
Cl4—C3—C4—O3 | −82.56 (16) | C10—N1—C32—C33 | 176.28 (14) |
C32—N1—C10—C21 | 56.15 (18) | C35—N2—C33—C32 | 58.39 (18) |
C36—N1—C10—C21 | 177.78 (14) | N1—C32—C33—N2 | −56.38 (18) |
C32—N1—C10—C11 | −177.16 (14) | C33—N2—C35—C36 | −59.54 (17) |
C36—N1—C10—C11 | −55.53 (18) | C32—N1—C36—C35 | −55.92 (17) |
C21—C10—C11—C16 | −101.3 (2) | C10—N1—C36—C35 | −178.09 (13) |
N1—C10—C11—C16 | 132.84 (18) | N2—C35—C36—N1 | 58.83 (18) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···O3i | 0.93 | 1.75 | 2.6756 (19) | 172 |
N2—H2A···O4ii | 0.92 | 1.88 | 2.7735 (19) | 162 |
N2—H2B···O2iii | 0.92 | 1.84 | 2.7487 (19) | 168 |
O100—H102···F2iv | 0.84 (1) | 2.32 (8) | 2.878 (4) | 125 (8) |
O100—H101···O1 | 0.84 (1) | 1.94 (4) | 2.733 (4) | 158 (9) |
Symmetry codes: (i) x−1, y, z; (ii) −x+1, −y, −z; (iii) x, y, z−1; (iv) x+1, −y+1/2, z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C17H20F2N22+·2C2Cl3O2−·0.4H2O |
Mr | 622.30 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 130 |
a, b, c (Å) | 8.8101 (7), 33.555 (3), 9.4453 (7) |
β (°) | 108.723 (2) |
V (Å3) | 2644.5 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.70 |
Crystal size (mm) | 0.43 × 0.25 × 0.23 |
Data collection | |
Diffractometer | Bruker SMART APEX |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.754, 0.856 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 25025, 6309, 5475 |
Rint | 0.033 |
(sin θ/λ)max (Å−1) | 0.658 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.094, 1.12 |
No. of reflections | 6309 |
No. of parameters | 343 |
No. of restraints | 5 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.44, −0.33 |
Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), SHELXTL (Sheldrick, 2008) and local programs.
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···O3i | 0.93 | 1.75 | 2.6756 (19) | 171.8 |
N2—H2A···O4ii | 0.92 | 1.88 | 2.7735 (19) | 162.0 |
N2—H2B···O2iii | 0.92 | 1.84 | 2.7487 (19) | 168.2 |
O100—H102···F2iv | 0.839 (10) | 2.32 (8) | 2.878 (4) | 125 (8) |
O100—H101···O1 | 0.840 (10) | 1.94 (4) | 2.733 (4) | 158 (9) |
Symmetry codes: (i) x−1, y, z; (ii) −x+1, −y, −z; (iii) x, y, z−1; (iv) x+1, −y+1/2, z+3/2. |
Acknowledgements
ASD thanks the University of Mysore for research facilities.
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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.
A review on the current pharmacological and toxicological information for piperazine derivatives is described (Elliott, 2011). 4,4'-Difluorobenzhydryl piperazine is an intermediate for the preparation of flunarizine which is a calcium channel blocker. Piperazines are among the most important building blocks in today's drug discovery and are found in biologically active compounds across a number of different therapeutic areas (Brockunier et al., 2004; Bogatcheva et al., 2006). Recently, we have reported the crystal structures of 4-[bis(4-fluorophenyl)methyl]piperazin-1-ium 2-(2-phenylethyl)benzoate (Betz et al., 2011) and 4-[bis(4-fluorophenyl) methyl]piperazin-1-ium picrate (Betz et al., 2011a). The crystal structures of melaminium bis(trifluoroacetate) trihydrate and melaminium bis(trichloroacetate) dihydrate have been reported (Perpétuo & Janczak, 2006). In the course of our studies on the salts of piperazines and in view of the importance of piperazines, we now report the crystal and molecular structure of the title salt. The presence of water in the crystal may be due to moisture from trichloroacetic acid. The water is part of intermolecular N—H···O, O(water)—H···O and O(water)—H···F interactions of the crystal packing (Figure 2 and Table 1). The molecular structure exhibits no unusual geometries. Both fluoro-phenyl rings form a dihedral angle of 68.64 (6)°, and each one chloro ligand of the two anions is disordered over two positions Cl31/Cl32 and Cl51/Cl52 with 0.945 (8)/0.055 (8) occupation.