organic compounds
1-[Bis(4-fluorophenyl)methyl]-4-[(2Z)-3-phenylprop-2-en-1-yl]piperazine-1,4-diium dichloride hemihydrate
aVittal Mallya Scientific Research Foundation, #94/3, 23rd Cross; 29th Main; BTM II Stage, Bangalore, 560-076, India, and bDepartment of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA
*Correspondence e-mail: jjasinski@keene.edu
The 26H28F2N22+·4Cl−.H2O, consists of a 1-[bis(4-fluorophenyl)methyl]-4-[(2Z)-3-phenylprop-2-en-1-yl]piperazine-1,4-diium cation with a diprotonated piperizine ring in close proximity to two chloride anions and a single water molecule that lies on a twofold rotation axis. In the cation, the piperazine ring adopts a slightly distorted chair conformation. The dihedral angles between the phenyl ring and the 4-fluorophenyl rings are 89.3 (9) and 35.0 (5)°. The two fluorophenyl rings are inclined at 65.0 (5)° to one another. In the crystal, N—H⋯Cl hydrogen bonds and weak C—H⋯Cl intermolecular interactions link the molecules into chains along [010]. In addition, weak C—H⋯O interactions between the piperizine and prop-2-en-1-yl groups with the water molecule, along with weak C—H⋯Cl interactions between the prop-2en-1-yl and methyl groups with the chloride ions, weak C—H⋯F interactions between the two fluorophenyl groups and weak O—H⋯Cl interactions between the water molecule and chloride ions form a three-dimensional supramolecular network.
of the title monohydrated salt, 2CCCDC reference: 1002927
Related literature
For the use of flunarizine {systematic name: (E)-1-[bis(4-fluorophenyl)methyl]-4-(3-phenyl-2-propenyl)piperazine} as an antihistamine and vasodilator, see: Agnoli et al. (1988); Prasanna & Row (2001). For the synthesis of (E)-isomers of 1-benzhydryl-4-cinnamyl piperazines, see: Cignarella & Testa (1968) and that of the Z-isomer of cinnerizine, [systematic name: (E)-1-(diphenylmethyl)-4-(3-phenylprop-2-enyl)piperazine], see; Shivaprakash & Chandrasekara Reddy (2014). For puckering parameters, see Cremer & Pople (1975). For standard bond lengths, see: Allen et al. (1987).
Experimental
Crystal data
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Data collection: CrysAlis PRO (Agilent, 2012); cell CrysAlis PRO; data reduction: CrysAlis RED (Agilent, 2012); program(s) used to solve structure: SUPERFLIP (Palatinus & Chapuis, 2007; Palatinus & van der Lee, 2008; Palatinus et al., 2012); program(s) used to refine structure: SHELXL2012 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2.
Supporting information
CCDC reference: 1002927
10.1107/S1600536814011064/sj5400sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536814011064/sj5400Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536814011064/sj5400Isup3.cml
To a solution of 1-(4, 4'-difluoro phenylmethyl)-4-(2-acetaldehyde) piperazine (5.6 g, 17.0 mmol) in dichloromethane (50 ml) under a nitrogen atmosphere was added benzyltriphenyl phosphonium chloride, (6.9 g, 17.9 mmol). The mixture was cooled to 278 °K and t-BuOK (4.6 g, 41.3 mmol) was added with stirring. After completion, the reaction mass was quenched into water (100 ml). The organic layer was separated, dried over anhydrous sodium sulfate and concentrated under vacuum. The solution was then subjected to
over silica gel with an EtOAc/Hexane (1:9) elutant mixture to afford (Z)-1-[bis-(4-fluorophenyl)-methyl]-4-(cinnamyl) piperazine as a viscous liquid. This was then converted into the hydrochloride salt using ethanolic HCl and crystallized from acetone/ethanol (2:8) mp 473-475°K.The H1, H2 and H1W atoms were located from a difference map and refined isotropically. All of the remaining H atoms were placed in their calculated positions and then refined using a riding model with Atom—H lengths of 0.95Å (CH) or 0.99Å (CH2). Isotropic displacement parameters for these atoms were set to 1.2 (CH, CH2) times Ueq of the parent atom.
Data collection: CrysAlis PRO (Agilent, 2012); cell
CrysAlis PRO (Agilent, 2012); data reduction: CrysAlis RED (Agilent, 2012); program(s) used to solve structure: Superflip (Palatinus & Chapuis, 2007; Palatinus & van der Lee, 2008; Palatinus et al., 2012); program(s) used to refine structure: SHELXL2012 (Sheldrick, 2008); molecular graphics: Olex2 (Dolomanov et al., 2009); software used to prepare material for publication: Olex2 (Dolomanov et al., 2009).Fig. 1. ORTEP drawing of the asymmetric unit of (I), showing the labeling scheme and with 30% probability displacement ellipsoids. | |
Fig. 2. Crystal packing of (I) viewed along the c axis. Dashed lines indicate N—H···Cl hydrogen bonds and weak C—H···Cl intermolecular interactions which link the molecules into chains along [010]. |
2C26H28F2N22+·4Cl−·H2O | F(000) = 1020 |
Mr = 972.82 | Dx = 1.290 Mg m−3 |
Monoclinic, P2/c | Mo Kα radiation, λ = 0.71073 Å |
a = 18.2973 (6) Å | Cell parameters from 7981 reflections |
b = 7.02041 (14) Å | θ = 3.5–32.4° |
c = 20.1554 (6) Å | µ = 0.29 mm−1 |
β = 104.601 (3)° | T = 173 K |
V = 2505.44 (13) Å3 | Irregular, colourless |
Z = 2 | 0.44 × 0.38 × 0.16 mm |
Agilent Eos Gemini diffractometer | 8607 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 6582 reflections with I > 2σ(I) |
Detector resolution: 16.0416 pixels mm-1 | Rint = 0.034 |
ω scans | θmax = 32.8°, θmin = 3.1° |
Absorption correction: multi-scan (CrysAlis PRO and CrysAlis RED; Agilent, 2012) | h = −27→26 |
Tmin = 0.914, Tmax = 1.000 | k = −10→10 |
32975 measured reflections | l = −29→29 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Hydrogen site location: mixed |
R[F2 > 2σ(F2)] = 0.057 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.153 | w = 1/[σ2(Fo2) + (0.0652P)2 + 1.0043P] where P = (Fo2 + 2Fc2)/3 |
S = 1.09 | (Δ/σ)max = 0.001 |
8607 reflections | Δρmax = 0.65 e Å−3 |
306 parameters | Δρmin = −0.41 e Å−3 |
0 restraints |
2C26H28F2N22+·4Cl−·H2O | V = 2505.44 (13) Å3 |
Mr = 972.82 | Z = 2 |
Monoclinic, P2/c | Mo Kα radiation |
a = 18.2973 (6) Å | µ = 0.29 mm−1 |
b = 7.02041 (14) Å | T = 173 K |
c = 20.1554 (6) Å | 0.44 × 0.38 × 0.16 mm |
β = 104.601 (3)° |
Agilent Eos Gemini diffractometer | 8607 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO and CrysAlis RED; Agilent, 2012) | 6582 reflections with I > 2σ(I) |
Tmin = 0.914, Tmax = 1.000 | Rint = 0.034 |
32975 measured reflections |
R[F2 > 2σ(F2)] = 0.057 | 0 restraints |
wR(F2) = 0.153 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.09 | Δρmax = 0.65 e Å−3 |
8607 reflections | Δρmin = −0.41 e Å−3 |
306 parameters |
Experimental. 1H NMR: δ 7.20 - 7.35(m, 9 H, Ar-H), 6.87-6.98 (m, 4 H, Ar-H), 6.50 (d, J = 12 Hz, 1 H), 5.76 (ddd, J = 12.0, 6.6 Hz, 1 H), 4.20(s, 1 H), 3.27 (dd, J = 6.6, 1.8 Hz, 2 H), 2.40 (bd, 8 H). 13C NMR: δ 163.1, 160.6, 138.3, 137.1, 132.6, 132.5, 131.5, 129.3, 129.2, 128.9, 128.2, 126.9, 115.5, 115.3, 74.5, 56.1, 53.4, 51.7. HRMS calculated for C26H26F2N2 [M+H] + 405.2142; found 405.2145. |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes. |
x | y | z | Uiso*/Ueq | ||
F1 | 0.47811 (8) | 0.7591 (2) | 0.63602 (8) | 0.0647 (4) | |
F2 | 0.57160 (8) | 0.7045 (2) | 0.20291 (6) | 0.0572 (3) | |
N1 | 0.92882 (7) | 0.74830 (17) | 0.58339 (6) | 0.0225 (2) | |
H1 | 0.9389 (11) | 0.865 (3) | 0.5856 (10) | 0.032 (5)* | |
N2 | 0.76733 (7) | 0.75240 (17) | 0.51554 (6) | 0.0219 (2) | |
H2 | 0.7600 (14) | 0.632 (4) | 0.5145 (13) | 0.054 (7)* | |
C1 | 0.87041 (8) | 0.7138 (2) | 0.62188 (8) | 0.0263 (3) | |
H1A | 0.8893 | 0.7589 | 0.6697 | 0.032* | |
H1B | 0.8603 | 0.5754 | 0.6231 | 0.032* | |
C2 | 0.79796 (8) | 0.8174 (2) | 0.58809 (7) | 0.0253 (3) | |
H2A | 0.7599 | 0.7938 | 0.6144 | 0.030* | |
H2B | 0.8078 | 0.9562 | 0.5886 | 0.030* | |
C3 | 0.82618 (8) | 0.7885 (2) | 0.47723 (8) | 0.0274 (3) | |
H3A | 0.8359 | 0.9271 | 0.4762 | 0.033* | |
H3B | 0.8075 | 0.7440 | 0.4293 | 0.033* | |
C4 | 0.89918 (9) | 0.6860 (2) | 0.51080 (8) | 0.0279 (3) | |
H4A | 0.8901 | 0.5468 | 0.5095 | 0.033* | |
H4B | 0.9373 | 0.7127 | 0.4848 | 0.033* | |
C5 | 1.00129 (8) | 0.6496 (2) | 0.61791 (8) | 0.0280 (3) | |
H5A | 1.0139 | 0.6773 | 0.6677 | 0.034* | |
H5B | 0.9946 | 0.5102 | 0.6118 | 0.034* | |
C6 | 1.06496 (9) | 0.7136 (2) | 0.58886 (9) | 0.0308 (3) | |
H6 | 1.0524 | 0.7780 | 0.5460 | 0.037* | |
C7 | 1.13753 (10) | 0.6868 (3) | 0.61864 (9) | 0.0366 (4) | |
H7 | 1.1721 | 0.7381 | 0.5952 | 0.044* | |
C8 | 1.17121 (9) | 0.5878 (3) | 0.68320 (9) | 0.0388 (4) | |
C9 | 1.23672 (11) | 0.6637 (5) | 0.72635 (12) | 0.0609 (7) | |
H9 | 1.2568 | 0.7796 | 0.7142 | 0.073* | |
C10 | 1.27239 (13) | 0.5731 (6) | 0.78600 (13) | 0.0792 (11) | |
H10 | 1.3171 | 0.6264 | 0.8145 | 0.095* | |
C11 | 1.24474 (16) | 0.4094 (6) | 0.80465 (12) | 0.0829 (12) | |
H11 | 1.2700 | 0.3480 | 0.8461 | 0.100* | |
C12 | 1.17920 (16) | 0.3301 (5) | 0.76321 (14) | 0.0731 (8) | |
H12 | 1.1592 | 0.2155 | 0.7765 | 0.088* | |
C13 | 1.14318 (12) | 0.4205 (4) | 0.70195 (11) | 0.0517 (5) | |
H13 | 1.0990 | 0.3659 | 0.6731 | 0.062* | |
C14 | 0.69337 (8) | 0.8548 (2) | 0.48296 (8) | 0.0251 (3) | |
H14 | 0.7049 | 0.9942 | 0.4854 | 0.030* | |
C15 | 0.63586 (8) | 0.8223 (2) | 0.52455 (8) | 0.0257 (3) | |
C16 | 0.60876 (9) | 0.6424 (2) | 0.53524 (9) | 0.0308 (3) | |
H16 | 0.6271 | 0.5335 | 0.5165 | 0.037* | |
C17 | 0.55524 (9) | 0.6199 (3) | 0.57288 (9) | 0.0357 (4) | |
H17 | 0.5370 | 0.4972 | 0.5805 | 0.043* | |
C18 | 0.52962 (10) | 0.7797 (3) | 0.59865 (10) | 0.0396 (4) | |
C19 | 0.55408 (11) | 0.9604 (3) | 0.58915 (11) | 0.0439 (4) | |
H19 | 0.5348 | 1.0684 | 0.6075 | 0.053* | |
C20 | 0.60802 (10) | 0.9802 (3) | 0.55179 (9) | 0.0355 (4) | |
H20 | 0.6261 | 1.1035 | 0.5448 | 0.043* | |
C21 | 0.66394 (8) | 0.8064 (2) | 0.40760 (8) | 0.0263 (3) | |
C22 | 0.65150 (11) | 0.9551 (3) | 0.36112 (9) | 0.0367 (4) | |
H22 | 0.6645 | 1.0812 | 0.3768 | 0.044* | |
C23 | 0.62021 (12) | 0.9224 (3) | 0.29177 (10) | 0.0463 (5) | |
H23 | 0.6114 | 1.0246 | 0.2599 | 0.056* | |
C24 | 0.60250 (10) | 0.7394 (3) | 0.27056 (9) | 0.0378 (4) | |
C25 | 0.61411 (11) | 0.5880 (3) | 0.31451 (9) | 0.0401 (4) | |
H25 | 0.6013 | 0.4624 | 0.2982 | 0.048* | |
C26 | 0.64509 (11) | 0.6225 (3) | 0.38353 (9) | 0.0374 (4) | |
H26 | 0.6536 | 0.5191 | 0.4149 | 0.045* | |
Cl2 | 0.24638 (3) | 0.67703 (5) | 0.48578 (2) | 0.03563 (11) | |
Cl1 | 0.03137 (3) | 0.83990 (6) | 0.40147 (2) | 0.04480 (13) | |
O1W | 0.0000 | 1.0343 (4) | 0.2500 | 0.0721 (9) | |
H1W | 0.009 (2) | 0.965 (5) | 0.2828 (16) | 0.095 (12)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
F1 | 0.0528 (8) | 0.0800 (10) | 0.0764 (10) | 0.0008 (7) | 0.0443 (7) | −0.0034 (8) |
F2 | 0.0648 (8) | 0.0718 (9) | 0.0270 (5) | −0.0031 (7) | −0.0032 (5) | −0.0023 (6) |
N1 | 0.0233 (6) | 0.0167 (5) | 0.0277 (6) | −0.0048 (4) | 0.0065 (4) | −0.0019 (4) |
N2 | 0.0232 (6) | 0.0172 (5) | 0.0252 (6) | −0.0048 (4) | 0.0057 (4) | −0.0032 (4) |
C1 | 0.0257 (7) | 0.0268 (7) | 0.0268 (7) | −0.0042 (5) | 0.0074 (5) | 0.0011 (5) |
C2 | 0.0268 (7) | 0.0246 (7) | 0.0242 (7) | −0.0031 (5) | 0.0059 (5) | −0.0049 (5) |
C3 | 0.0259 (7) | 0.0326 (7) | 0.0246 (7) | −0.0066 (6) | 0.0079 (5) | −0.0016 (6) |
C4 | 0.0269 (7) | 0.0286 (7) | 0.0291 (7) | −0.0058 (6) | 0.0087 (5) | −0.0083 (6) |
C5 | 0.0255 (7) | 0.0218 (6) | 0.0354 (8) | −0.0002 (5) | 0.0055 (6) | 0.0035 (6) |
C6 | 0.0285 (7) | 0.0307 (7) | 0.0337 (8) | −0.0028 (6) | 0.0084 (6) | 0.0004 (6) |
C7 | 0.0276 (8) | 0.0473 (10) | 0.0362 (9) | −0.0054 (7) | 0.0105 (6) | −0.0044 (7) |
C8 | 0.0229 (7) | 0.0622 (12) | 0.0310 (8) | 0.0065 (7) | 0.0065 (6) | −0.0085 (8) |
C9 | 0.0273 (9) | 0.109 (2) | 0.0442 (11) | −0.0009 (11) | 0.0045 (8) | −0.0229 (12) |
C10 | 0.0341 (11) | 0.163 (3) | 0.0369 (12) | 0.0208 (16) | 0.0014 (9) | −0.0149 (16) |
C11 | 0.0559 (15) | 0.161 (3) | 0.0311 (11) | 0.0581 (19) | 0.0092 (10) | 0.0130 (15) |
C12 | 0.0650 (16) | 0.096 (2) | 0.0596 (15) | 0.0335 (15) | 0.0176 (12) | 0.0297 (15) |
C13 | 0.0427 (11) | 0.0628 (14) | 0.0455 (11) | 0.0125 (10) | 0.0034 (8) | 0.0102 (10) |
C14 | 0.0268 (7) | 0.0187 (6) | 0.0291 (7) | −0.0030 (5) | 0.0058 (5) | −0.0020 (5) |
C15 | 0.0232 (6) | 0.0260 (7) | 0.0261 (7) | −0.0029 (5) | 0.0027 (5) | −0.0045 (5) |
C16 | 0.0276 (7) | 0.0285 (7) | 0.0372 (8) | −0.0037 (6) | 0.0098 (6) | −0.0039 (6) |
C17 | 0.0278 (8) | 0.0412 (9) | 0.0381 (9) | −0.0067 (7) | 0.0085 (6) | −0.0017 (7) |
C18 | 0.0268 (8) | 0.0566 (11) | 0.0378 (9) | −0.0006 (8) | 0.0126 (7) | −0.0026 (8) |
C19 | 0.0438 (10) | 0.0455 (11) | 0.0462 (11) | 0.0061 (8) | 0.0185 (8) | −0.0103 (8) |
C20 | 0.0388 (9) | 0.0285 (8) | 0.0397 (9) | −0.0006 (7) | 0.0110 (7) | −0.0071 (7) |
C21 | 0.0253 (7) | 0.0257 (7) | 0.0277 (7) | −0.0024 (5) | 0.0060 (5) | −0.0008 (5) |
C22 | 0.0427 (9) | 0.0303 (8) | 0.0351 (9) | −0.0008 (7) | 0.0059 (7) | 0.0031 (7) |
C23 | 0.0562 (12) | 0.0420 (10) | 0.0351 (9) | 0.0020 (9) | 0.0011 (8) | 0.0093 (8) |
C24 | 0.0342 (8) | 0.0521 (11) | 0.0245 (7) | −0.0011 (8) | 0.0023 (6) | −0.0019 (7) |
C25 | 0.0479 (10) | 0.0377 (9) | 0.0326 (9) | −0.0091 (8) | 0.0064 (7) | −0.0079 (7) |
C26 | 0.0532 (11) | 0.0284 (8) | 0.0285 (8) | −0.0073 (7) | 0.0063 (7) | −0.0013 (6) |
Cl2 | 0.0432 (2) | 0.01969 (17) | 0.0464 (2) | −0.00479 (15) | 0.01574 (17) | −0.00344 (15) |
Cl1 | 0.0689 (3) | 0.02108 (18) | 0.0417 (2) | −0.01358 (19) | 0.0089 (2) | −0.00149 (15) |
O1W | 0.137 (3) | 0.0383 (12) | 0.0386 (13) | 0.000 | 0.0176 (15) | 0.000 |
F1—C18 | 1.354 (2) | C10—H10 | 0.9500 |
F2—C24 | 1.360 (2) | C10—C11 | 1.346 (5) |
N1—H1 | 0.84 (2) | C11—H11 | 0.9500 |
N1—C1 | 1.4903 (19) | C11—C12 | 1.393 (5) |
N1—C4 | 1.4920 (19) | C12—H12 | 0.9500 |
N1—C5 | 1.5023 (19) | C12—C13 | 1.397 (3) |
N2—H2 | 0.86 (3) | C13—H13 | 0.9500 |
N2—C2 | 1.4992 (18) | C14—H14 | 1.0000 |
N2—C3 | 1.4962 (19) | C14—C15 | 1.519 (2) |
N2—C14 | 1.5268 (19) | C14—C21 | 1.517 (2) |
C1—H1A | 0.9900 | C15—C16 | 1.394 (2) |
C1—H1B | 0.9900 | C15—C20 | 1.389 (2) |
C1—C2 | 1.515 (2) | C16—H16 | 0.9500 |
C2—H2A | 0.9900 | C16—C17 | 1.391 (2) |
C2—H2B | 0.9900 | C17—H17 | 0.9500 |
C3—H3A | 0.9900 | C17—C18 | 1.368 (3) |
C3—H3B | 0.9900 | C18—C19 | 1.374 (3) |
C3—C4 | 1.518 (2) | C19—H19 | 0.9500 |
C4—H4A | 0.9900 | C19—C20 | 1.391 (3) |
C4—H4B | 0.9900 | C20—H20 | 0.9500 |
C5—H5A | 0.9900 | C21—C22 | 1.383 (2) |
C5—H5B | 0.9900 | C21—C26 | 1.391 (2) |
C5—C6 | 1.499 (2) | C22—H22 | 0.9500 |
C6—H6 | 0.9500 | C22—C23 | 1.390 (3) |
C6—C7 | 1.326 (2) | C23—H23 | 0.9500 |
C7—H7 | 0.9500 | C23—C24 | 1.366 (3) |
C7—C8 | 1.467 (3) | C24—C25 | 1.366 (3) |
C8—C9 | 1.397 (3) | C25—H25 | 0.9500 |
C8—C13 | 1.372 (3) | C25—C26 | 1.385 (2) |
C9—H9 | 0.9500 | C26—H26 | 0.9500 |
C9—C10 | 1.371 (4) | O1W—H1W | 0.80 (3) |
C1—N1—H1 | 108.0 (14) | C9—C10—H10 | 119.6 |
C1—N1—C4 | 109.37 (11) | C11—C10—C9 | 120.7 (3) |
C1—N1—C5 | 110.43 (12) | C11—C10—H10 | 119.6 |
C4—N1—H1 | 111.1 (14) | C10—C11—H11 | 120.0 |
C4—N1—C5 | 112.28 (12) | C10—C11—C12 | 120.1 (2) |
C5—N1—H1 | 105.5 (14) | C12—C11—H11 | 120.0 |
C2—N2—H2 | 110.0 (17) | C11—C12—H12 | 120.3 |
C2—N2—C14 | 110.42 (11) | C11—C12—C13 | 119.4 (3) |
C3—N2—H2 | 106.5 (17) | C13—C12—H12 | 120.3 |
C3—N2—C2 | 108.12 (11) | C8—C13—C12 | 120.4 (2) |
C3—N2—C14 | 111.93 (11) | C8—C13—H13 | 119.8 |
C14—N2—H2 | 109.8 (16) | C12—C13—H13 | 119.8 |
N1—C1—H1A | 109.6 | N2—C14—H14 | 106.6 |
N1—C1—H1B | 109.6 | C15—C14—N2 | 110.76 (12) |
N1—C1—C2 | 110.42 (12) | C15—C14—H14 | 106.6 |
H1A—C1—H1B | 108.1 | C21—C14—N2 | 112.19 (12) |
C2—C1—H1A | 109.6 | C21—C14—H14 | 106.6 |
C2—C1—H1B | 109.6 | C21—C14—C15 | 113.49 (12) |
N2—C2—C1 | 111.21 (12) | C16—C15—C14 | 122.98 (14) |
N2—C2—H2A | 109.4 | C20—C15—C14 | 118.21 (14) |
N2—C2—H2B | 109.4 | C20—C15—C16 | 118.80 (15) |
C1—C2—H2A | 109.4 | C15—C16—H16 | 119.5 |
C1—C2—H2B | 109.4 | C17—C16—C15 | 120.94 (16) |
H2A—C2—H2B | 108.0 | C17—C16—H16 | 119.5 |
N2—C3—H3A | 109.5 | C16—C17—H17 | 121.0 |
N2—C3—H3B | 109.5 | C18—C17—C16 | 118.02 (17) |
N2—C3—C4 | 110.88 (13) | C18—C17—H17 | 121.0 |
H3A—C3—H3B | 108.1 | F1—C18—C17 | 118.46 (19) |
C4—C3—H3A | 109.5 | F1—C18—C19 | 118.21 (18) |
C4—C3—H3B | 109.5 | C17—C18—C19 | 123.32 (17) |
N1—C4—C3 | 111.06 (12) | C18—C19—H19 | 121.1 |
N1—C4—H4A | 109.4 | C18—C19—C20 | 117.90 (17) |
N1—C4—H4B | 109.4 | C20—C19—H19 | 121.1 |
C3—C4—H4A | 109.4 | C15—C20—C19 | 121.03 (17) |
C3—C4—H4B | 109.4 | C15—C20—H20 | 119.5 |
H4A—C4—H4B | 108.0 | C19—C20—H20 | 119.5 |
N1—C5—H5A | 109.4 | C22—C21—C14 | 117.74 (14) |
N1—C5—H5B | 109.4 | C22—C21—C26 | 118.70 (15) |
H5A—C5—H5B | 108.0 | C26—C21—C14 | 123.46 (14) |
C6—C5—N1 | 111.30 (13) | C21—C22—H22 | 119.6 |
C6—C5—H5A | 109.4 | C21—C22—C23 | 120.81 (17) |
C6—C5—H5B | 109.4 | C23—C22—H22 | 119.6 |
C5—C6—H6 | 117.7 | C22—C23—H23 | 120.8 |
C7—C6—C5 | 124.69 (16) | C24—C23—C22 | 118.38 (17) |
C7—C6—H6 | 117.7 | C24—C23—H23 | 120.8 |
C6—C7—H7 | 115.9 | F2—C24—C23 | 119.28 (17) |
C6—C7—C8 | 128.16 (17) | F2—C24—C25 | 117.85 (17) |
C8—C7—H7 | 115.9 | C25—C24—C23 | 122.87 (17) |
C9—C8—C7 | 118.3 (2) | C24—C25—H25 | 120.9 |
C13—C8—C7 | 123.18 (17) | C24—C25—C26 | 118.21 (17) |
C13—C8—C9 | 118.4 (2) | C26—C25—H25 | 120.9 |
C8—C9—H9 | 119.6 | C21—C26—H26 | 119.5 |
C10—C9—C8 | 120.9 (3) | C25—C26—C21 | 121.02 (17) |
C10—C9—H9 | 119.6 | C25—C26—H26 | 119.5 |
F1—C18—C19—C20 | 178.84 (18) | C9—C10—C11—C12 | 0.0 (4) |
F2—C24—C25—C26 | −179.58 (17) | C10—C11—C12—C13 | 0.8 (4) |
N1—C1—C2—N2 | 59.47 (16) | C11—C12—C13—C8 | −1.1 (4) |
N1—C5—C6—C7 | 163.61 (17) | C13—C8—C9—C10 | 0.2 (3) |
N2—C3—C4—N1 | −58.67 (16) | C14—N2—C2—C1 | 178.60 (12) |
N2—C14—C15—C16 | −61.46 (18) | C14—N2—C3—C4 | 179.76 (11) |
N2—C14—C15—C20 | 119.97 (15) | C14—C15—C16—C17 | −179.06 (15) |
N2—C14—C21—C22 | −123.12 (15) | C14—C15—C20—C19 | 178.65 (16) |
N2—C14—C21—C26 | 60.5 (2) | C14—C21—C22—C23 | −176.00 (17) |
C1—N1—C4—C3 | 57.27 (16) | C14—C21—C26—C25 | 176.01 (17) |
C1—N1—C5—C6 | −168.49 (13) | C15—C14—C21—C22 | 110.39 (16) |
C2—N2—C3—C4 | 57.92 (15) | C15—C14—C21—C26 | −65.9 (2) |
C2—N2—C14—C15 | −57.12 (15) | C15—C16—C17—C18 | 0.5 (3) |
C2—N2—C14—C21 | 174.93 (12) | C16—C15—C20—C19 | 0.0 (3) |
C3—N2—C2—C1 | −58.64 (15) | C16—C17—C18—F1 | −179.29 (16) |
C3—N2—C14—C15 | −177.63 (12) | C16—C17—C18—C19 | 0.0 (3) |
C3—N2—C14—C21 | 54.42 (15) | C17—C18—C19—C20 | −0.5 (3) |
C4—N1—C1—C2 | −57.40 (16) | C18—C19—C20—C15 | 0.4 (3) |
C4—N1—C5—C6 | 69.16 (16) | C20—C15—C16—C17 | −0.5 (2) |
C5—N1—C1—C2 | 178.55 (12) | C21—C14—C15—C16 | 65.78 (19) |
C5—N1—C4—C3 | −179.78 (12) | C21—C14—C15—C20 | −112.80 (16) |
C5—C6—C7—C8 | 1.9 (3) | C21—C22—C23—C24 | −0.4 (3) |
C6—C7—C8—C9 | −141.2 (2) | C22—C21—C26—C25 | −0.3 (3) |
C6—C7—C8—C13 | 41.5 (3) | C22—C23—C24—F2 | 179.79 (18) |
C7—C8—C9—C10 | −177.3 (2) | C22—C23—C24—C25 | 0.1 (3) |
C7—C8—C13—C12 | 178.0 (2) | C23—C24—C25—C26 | 0.1 (3) |
C8—C9—C10—C11 | −0.5 (4) | C24—C25—C26—C21 | 0.0 (3) |
C9—C8—C13—C12 | 0.7 (3) | C26—C21—C22—C23 | 0.5 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···Cl1i | 0.84 (2) | 2.14 (2) | 2.9782 (13) | 176 (2) |
N2—H2···Cl2ii | 0.86 (3) | 2.17 (3) | 3.0248 (13) | 174 (2) |
C1—H1A···O1Wi | 0.99 | 2.68 | 3.512 (2) | 142 |
C5—H5A···O1Wi | 0.99 | 2.67 | 3.470 (2) | 138 |
C5—H5B···Cl1ii | 0.99 | 2.51 | 3.4934 (16) | 176 |
C14—H14···Cl2i | 1.00 | 2.49 | 3.4735 (15) | 168 |
C19—H19···F2iii | 0.95 | 2.46 | 3.244 (2) | 140 |
O1W—H1W···Cl1 | 0.80 (3) | 2.48 (3) | 3.2603 (12) | 163 (3) |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) −x+1, −y+1, −z+1; (iii) x, −y+2, z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···Cl1i | 0.84 (2) | 2.14 (2) | 2.9782 (13) | 176 (2) |
N2—H2···Cl2ii | 0.86 (3) | 2.17 (3) | 3.0248 (13) | 174 (2) |
C1—H1A···O1Wi | 0.99 | 2.68 | 3.512 (2) | 141.8 |
C5—H5A···O1Wi | 0.99 | 2.67 | 3.470 (2) | 138.1 |
C5—H5B···Cl1ii | 0.99 | 2.51 | 3.4934 (16) | 175.8 |
C14—H14···Cl2i | 1.00 | 2.49 | 3.4735 (15) | 167.9 |
C19—H19···F2iii | 0.95 | 2.46 | 3.244 (2) | 140.1 |
O1W—H1W···Cl1 | 0.80 (3) | 2.48 (3) | 3.2603 (12) | 163 (3) |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) −x+1, −y+1, −z+1; (iii) x, −y+2, z+1/2. |
Acknowledgements
We express our sincere thanks to Dr Anil Kush, Director, VMSRF for his keen interest and support throughout this work. JPJ acknowledges the NSF–MRI program (grant No. CHE-1039027) for funds to purchase the X-ray diffractometer.
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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.
Flunarizine, (E)-1-[bis(4-fluorophenyl)methyl]-4-(3-phenyl-2- propenyl)piperazine, is a clinically useful drug used as an antihistamine and vasodilator (Agnoli et al. (1988), Prasanna & Row (2001). Because the greater biological importance of (E)-isomers of 1-benzhydryl-4-cinnamyl piperazines has been recognised, several synthetic methods for these isomers have been described (Cignarella & Testa, 1968). However, the synthesis of (Z)-1-[bis(4-fluorophenyl)methyl]-4-(3-phenyl-2-propenyl)piperazine has only recently been reported (Shivaprakash & Chandrasekara Reddy, 2014).
The title compound, 2(C26H28F2N2), 4(Cl), H2O, (I), is a close analogue of the existing drug, flunarizine, which has an (E) configuration. The crystal structure of flunarizine has been reported (Prasanna & Row, 2001). We have prepared the (Z) isomer (I) for the first time as the crystalline hydrochloride salt to study structure activity relationships and we report its structure here.
The asymmetric unit of the title monohydrated salt, 2(C26H28F2N22+), 4(Cl-), H2O, (I), consists of a [(Z)-1-[bis(4-fluorophenyl)methyl]-4-(3-phenyl-2-propenyl)piperazine] cation with a diprotonated piperizine ring in close proximity to two chloride anions and a single water molecule that lies on a two-fold rotation axis (Fig. 1). The piperazine group adopts a slightly distorted chair conformation (puckering parameters Q, θ, and ϕ = 0.5911 (15)Å, 0.95 (15)° and 154 (8)°, respectively (Cremer & Pople, 1975). Bond lengths are within normal ranges (Allen et al., 1987). In the cation, the dihedral angles between the mean planes of the two 4-fluorophenyl rings with that of the phenyl ring are 89.3 (9)° and 35.0 (5)°, respectively. The two fluorophenyl groups are inclined at 65.0 (5)° to one another. In the crystal, N—H···Cl hydrogen bonds and weak C—H···Cl intermolecular interactions link the molecules into chains along [010] (Fig. 2). In addition, weak C—H···O interactions between the piperizine and prop-2-en-1-yl groups with the water molecule along with weak C—H···Cl interactions between the prop-2en-1-yl and methyl groups with the chloride ions and weak C—H···F interactions between the two fluorophenyl groups and weak O—H···Cl interactions between the water molecule and chloride ions (Table 1) form a 3-D supramolecular network.