organic compounds
2-{[2,8-Bis(trifluoromethyl)quinolin-4-yl](hydroxy)methyl}piperidin-1-ium 3-amino-5-nitrobenzoate sesquihydrate
aFundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos – Farmanguinhos, R. Sizenando Nabuco 100, Manguinhos, 21041-250 Rio de Janeiro, RJ, Brazil, bCentro de Desenvolvimento Tecnológico em Saúde (CDTS), Fundação Oswaldo Cruz (FIOCRUZ), Casa Amarela, Campus de Manguinhos, Av. Brasil 4365, 21040-900 Rio de Janeiro, RJ, Brazil, cCHEMSOL, 1 Harcourt Road, Aberdeen AB15 5NY, Scotland, dDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and eChemistry Department, Faculty of Science, King Abdulaziz University, PO Box 80203 Jeddah, Saudi Arabia
*Correspondence e-mail: edward.tiekink@gmail.com
The 17H17F6N2O+·C7H5N2O4−·1.5H2O, comprises a piperidin-1-ium cation, a 3-amino-5-nitrobenzoate anion, and three fractionally occupied [i.e. 0.414 (3), 0.627 (6) and 0.459 (5)] disordered water molecules of solvation. The cation has an L shape with a C—C—C—C torsion angle of −102.9 (3)° for the atoms linking the quinolinyl group to the rest of the cation. In the anion, the carboxylate and nitro groups are essentially coplanar with the benzene ring [O—C—C—C torsion angle = 179.7 (2)° and O—N—C—C torsion angle = −3.9 (3)°]. In the crystal, extensive O—H⋯O, O—H⋯F and N—H⋯·O hydrogen bonding leads to the formation of a layer in the ab plane.
of the title salt solvate, CRelated literature
For background information on mefloquine and derivatives, see: Kunin & Ellis (2007); Maguire et al. (2006); Dow et al. (2004). For selected crystal structures of mefloquine and its salts, see: Obaleye et al. (2009); Skórska et al. (2005); Karle & Karle (1991, 2002); Wardell et al. (2010, 2011).
Experimental
Crystal data
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Refinement
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Data collection: COLLECT (Hooft, 1998); cell DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO and COLLECT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
10.1107/S160053681104270X/lh5355sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S160053681104270X/lh5355Isup2.hkl
A solution of mefloquine (0.383 g, 1 mmol) and 3-amino-5-nitrobenzoic acid (0.18 g. 1 mmol) in EtOH (15 ml) was refluxed for 20 min. On maintaining the reaction mixture at room temperature, crystals of the title salt slowly formed. M.pt.: 503–504 K (dec.). IR ν: 3600–2200(br), 1632, 1612, 1555, 1518, 1472, 1435, 1389, 1344, 1310, 1265, 1217, 1184, 1150, 1109, 1078, 1013, 970, 934, 918, 899, 887, 866, 839, 795, 783, 743, 725, 665, 542, 444 cm-1.
The C-bound H atoms were geometrically placed (C—H = 0.95–1.00 Å) and refined as riding with Uiso(H) = 1.2Ueq(C). The O—H and N—H H atoms were located from a difference map and refined with O—H = 0.84±0.01 Å and N—H = 0.88–0.92±0.01 Å, respectively, and with Uiso(H) = yUeq(O or N) with y = 1.5 for O and y = 1.2 for N. There are a total of 1.5 water molecules in the
and these are disordered over three positions with site occupancies factors of 0.414 (3), 0.627 (6) and 0.459 (5); hydrogen atoms were located for each of these and refined as described above.Data collection: COLLECT (Hooft, 1998); cell
DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); data reduction: DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. The molecular structures of the components comprising the asymmetric unit in (I) showing the atom-labelling scheme and displacement ellipsoids at the 50% probability level. The disordered water molecules of solvation have been omitted for reasons of clarity. | |
Fig. 2. A view in projection along the a axis of the unit-cell contents in (I) showing the alternation of cations and anions along the c axis. The O—H···O, N—H···O and O—H···F interactions are shown as orange, blue and green dashed lines, respectively. |
C17H17F6N2O+·C7H5N2O4−·1.5H2O | Z = 2 |
Mr = 587.48 | F(000) = 606 |
Triclinic, P1 | Dx = 1.537 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.1705 (5) Å | Cell parameters from 30639 reflections |
b = 12.5446 (9) Å | θ = 2.9–27.5° |
c = 12.7788 (8) Å | µ = 0.14 mm−1 |
α = 66.278 (4)° | T = 120 K |
β = 77.261 (4)° | Block, orange |
γ = 71.537 (4)° | 0.28 × 0.16 × 0.10 mm |
V = 1269.23 (14) Å3 |
Bruker–Nonius APEXII CCD camera on κ-goniostat diffractometer | 5832 independent reflections |
Radiation source: Bruker-Nonius FR591 rotating anode | 3477 reflections with I > 2σ(I) |
10cm confocal mirrors monochromator | Rint = 0.078 |
Detector resolution: 9.091 pixels mm-1 | θmax = 27.6°, θmin = 3.0° |
ϕ & ω scans | h = −11→11 |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | k = −16→16 |
Tmin = 0.640, Tmax = 0.746 | l = −16→16 |
25681 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)] = 0.064 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.174 | w = 1/[σ2(Fo2) + (0.0836P)2 + 0.2367P] where P = (Fo2 + 2Fc2)/3 |
S = 1.03 | (Δ/σ)max < 0.001 |
5832 reflections | Δρmax = 0.39 e Å−3 |
416 parameters | Δρmin = −0.38 e Å−3 |
15 restraints | Extinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.032 (4) |
C17H17F6N2O+·C7H5N2O4−·1.5H2O | γ = 71.537 (4)° |
Mr = 587.48 | V = 1269.23 (14) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.1705 (5) Å | Mo Kα radiation |
b = 12.5446 (9) Å | µ = 0.14 mm−1 |
c = 12.7788 (8) Å | T = 120 K |
α = 66.278 (4)° | 0.28 × 0.16 × 0.10 mm |
β = 77.261 (4)° |
Bruker–Nonius APEXII CCD camera on κ-goniostat diffractometer | 5832 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | 3477 reflections with I > 2σ(I) |
Tmin = 0.640, Tmax = 0.746 | Rint = 0.078 |
25681 measured reflections |
R[F2 > 2σ(F2)] = 0.064 | 15 restraints |
wR(F2) = 0.174 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.39 e Å−3 |
5832 reflections | Δρmin = −0.38 e Å−3 |
416 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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) | |
F1 | 0.87381 (17) | 0.49471 (18) | 0.83650 (15) | 0.0532 (5) | |
F2 | 0.74544 (19) | 0.50218 (18) | 0.99348 (14) | 0.0515 (5) | |
F3 | 0.7703 (2) | 0.66464 (17) | 0.8535 (2) | 0.0766 (7) | |
F4 | 0.55227 (19) | 0.21925 (14) | 0.99220 (14) | 0.0443 (4) | |
F5 | 0.69944 (17) | 0.22502 (14) | 0.83406 (15) | 0.0457 (5) | |
F6 | 0.51655 (18) | 0.13558 (14) | 0.88618 (15) | 0.0443 (4) | |
O1 | 0.3030 (2) | 0.89697 (16) | 0.68621 (16) | 0.0321 (4) | |
H1 | 0.287 (4) | 0.940 (2) | 0.6179 (12) | 0.048* | |
O2 | 0.2506 (2) | 1.03009 (17) | 0.46810 (18) | 0.0442 (5) | |
O3 | 0.0666 (2) | 1.19038 (17) | 0.39087 (19) | 0.0437 (5) | |
O4 | 0.0825 (2) | 1.58565 (17) | 0.37663 (17) | 0.0409 (5) | |
O5 | 0.2815 (3) | 1.60038 (18) | 0.42819 (19) | 0.0509 (6) | |
O1W | 0.3447 (6) | 1.0482 (5) | 0.7901 (4) | 0.0431 (14) | 0.414 (3) |
H1W1 | 0.358 (8) | 0.991 (5) | 0.768 (7) | 0.065* | 0.414 (3) |
H1W2 | 0.413 (7) | 1.086 (6) | 0.754 (6) | 0.065* | 0.414 (3) |
O2W | 0.0428 (4) | 1.1348 (3) | 0.7158 (3) | 0.0449 (11) | 0.627 (6) |
H2W1 | 0.128 (3) | 1.133 (4) | 0.733 (5) | 0.067* | 0.627 (6) |
H2W2 | −0.006 (5) | 1.2078 (17) | 0.689 (5) | 0.067* | 0.627 (6) |
O3W | −0.0625 (6) | 1.1518 (4) | 0.6409 (4) | 0.0467 (16) | 0.459 (5) |
H3W1 | −0.022 (9) | 1.158 (6) | 0.573 (3) | 0.070* | 0.459 (5) |
H3W2 | −0.096 (9) | 1.221 (3) | 0.644 (6) | 0.070* | 0.459 (5) |
N1 | 0.5885 (2) | 0.46024 (19) | 0.84811 (18) | 0.0284 (5) | |
N2 | −0.0203 (2) | 0.9090 (2) | 0.7489 (2) | 0.0297 (5) | |
H21 | −0.039 (3) | 0.895 (3) | 0.6913 (17) | 0.036* | |
H22 | 0.008 (3) | 0.9766 (16) | 0.727 (2) | 0.036* | |
N3 | 0.2069 (3) | 1.5407 (2) | 0.41647 (19) | 0.0338 (5) | |
N4 | 0.6061 (3) | 1.1835 (2) | 0.5903 (2) | 0.0467 (7) | |
H41 | 0.657 (3) | 1.1130 (16) | 0.585 (3) | 0.056* | |
H42 | 0.660 (3) | 1.230 (3) | 0.590 (3) | 0.056* | |
C1 | 0.6030 (3) | 0.5648 (2) | 0.8371 (2) | 0.0273 (6) | |
C2 | 0.4964 (3) | 0.6767 (2) | 0.7926 (2) | 0.0269 (6) | |
H2A | 0.5132 | 0.7488 | 0.7899 | 0.032* | |
C3 | 0.3666 (3) | 0.6788 (2) | 0.7529 (2) | 0.0261 (6) | |
C4 | 0.3486 (3) | 0.5686 (2) | 0.7576 (2) | 0.0262 (6) | |
C5 | 0.2229 (3) | 0.5601 (2) | 0.7155 (2) | 0.0295 (6) | |
H5 | 0.1475 | 0.6313 | 0.6800 | 0.035* | |
C6 | 0.2094 (3) | 0.4515 (2) | 0.7256 (2) | 0.0320 (6) | |
H6A | 0.1254 | 0.4478 | 0.6962 | 0.038* | |
C7 | 0.3189 (3) | 0.3440 (2) | 0.7793 (2) | 0.0325 (6) | |
H7 | 0.3071 | 0.2686 | 0.7868 | 0.039* | |
C8 | 0.4418 (3) | 0.3481 (2) | 0.8204 (2) | 0.0295 (6) | |
C9 | 0.4616 (3) | 0.4604 (2) | 0.8081 (2) | 0.0273 (6) | |
C10 | 0.7471 (3) | 0.5578 (2) | 0.8802 (2) | 0.0322 (6) | |
C11 | 0.5530 (3) | 0.2330 (2) | 0.8820 (3) | 0.0350 (6) | |
C12 | 0.2441 (3) | 0.7967 (2) | 0.7111 (2) | 0.0278 (6) | |
H12A | 0.2092 | 0.8029 | 0.6396 | 0.033* | |
C13 | 0.1041 (3) | 0.7996 (2) | 0.8030 (2) | 0.0281 (6) | |
H13 | 0.0664 | 0.7264 | 0.8232 | 0.034* | |
C14 | −0.1666 (3) | 0.9248 (3) | 0.8275 (3) | 0.0371 (7) | |
H14A | −0.2144 | 0.8581 | 0.8453 | 0.045* | |
H14B | −0.2404 | 1.0013 | 0.7885 | 0.045* | |
C15 | −0.1351 (3) | 0.9265 (3) | 0.9384 (2) | 0.0374 (7) | |
H15A | −0.2316 | 0.9299 | 0.9914 | 0.045* | |
H15B | −0.1005 | 0.9994 | 0.9217 | 0.045* | |
C16 | −0.0107 (3) | 0.8142 (3) | 0.9959 (2) | 0.0385 (7) | |
H16A | 0.0126 | 0.8192 | 1.0656 | 0.046* | |
H16B | −0.0491 | 0.7416 | 1.0196 | 0.046* | |
C17 | 0.1353 (3) | 0.8042 (3) | 0.9131 (2) | 0.0328 (6) | |
H17A | 0.2141 | 0.7304 | 0.9506 | 0.039* | |
H17B | 0.1773 | 0.8742 | 0.8939 | 0.039* | |
C18 | 0.1878 (3) | 1.1404 (2) | 0.4389 (2) | 0.0297 (6) | |
C19 | 0.2628 (3) | 1.2185 (2) | 0.4629 (2) | 0.0273 (6) | |
C20 | 0.1963 (3) | 1.3416 (2) | 0.4311 (2) | 0.0275 (6) | |
H20 | 0.1021 | 1.3781 | 0.3969 | 0.033* | |
C21 | 0.2735 (3) | 1.4088 (2) | 0.4515 (2) | 0.0294 (6) | |
C22 | 0.4084 (3) | 1.3611 (2) | 0.5017 (2) | 0.0322 (6) | |
H22A | 0.4565 | 1.4115 | 0.5137 | 0.039* | |
C23 | 0.4745 (3) | 1.2369 (2) | 0.5350 (2) | 0.0325 (6) | |
C24 | 0.3990 (3) | 1.1676 (2) | 0.5141 (2) | 0.0297 (6) | |
H24 | 0.4425 | 1.0832 | 0.5356 | 0.036* |
U11 | U22 | U33 | U12 | U13 | U23 | |
F1 | 0.0231 (8) | 0.0818 (14) | 0.0522 (11) | −0.0005 (8) | −0.0032 (7) | −0.0318 (10) |
F2 | 0.0431 (10) | 0.0790 (14) | 0.0330 (9) | −0.0209 (9) | −0.0030 (7) | −0.0173 (9) |
F3 | 0.0609 (12) | 0.0301 (11) | 0.140 (2) | −0.0128 (9) | −0.0556 (13) | −0.0075 (12) |
F4 | 0.0490 (10) | 0.0316 (10) | 0.0437 (10) | −0.0045 (7) | −0.0151 (8) | −0.0043 (8) |
F5 | 0.0274 (8) | 0.0313 (9) | 0.0670 (12) | 0.0030 (7) | −0.0015 (8) | −0.0161 (9) |
F6 | 0.0432 (9) | 0.0209 (9) | 0.0658 (11) | −0.0029 (7) | −0.0133 (8) | −0.0129 (8) |
O1 | 0.0339 (10) | 0.0219 (10) | 0.0374 (10) | −0.0080 (8) | −0.0063 (8) | −0.0055 (8) |
O2 | 0.0627 (13) | 0.0206 (11) | 0.0550 (13) | −0.0047 (9) | −0.0330 (11) | −0.0102 (9) |
O3 | 0.0380 (11) | 0.0283 (11) | 0.0703 (14) | −0.0028 (9) | −0.0203 (10) | −0.0201 (11) |
O4 | 0.0492 (12) | 0.0263 (11) | 0.0478 (12) | −0.0050 (9) | −0.0130 (10) | −0.0133 (10) |
O5 | 0.0781 (15) | 0.0252 (11) | 0.0601 (14) | −0.0162 (10) | −0.0286 (12) | −0.0129 (10) |
O1W | 0.050 (3) | 0.044 (3) | 0.040 (3) | −0.017 (2) | −0.003 (2) | −0.019 (3) |
O2W | 0.043 (2) | 0.032 (2) | 0.056 (2) | −0.0070 (15) | −0.0043 (17) | −0.0147 (18) |
O3W | 0.049 (3) | 0.030 (3) | 0.055 (3) | −0.005 (2) | −0.003 (2) | −0.014 (2) |
N1 | 0.0231 (11) | 0.0252 (12) | 0.0322 (12) | −0.0050 (9) | 0.0003 (9) | −0.0081 (10) |
N2 | 0.0301 (11) | 0.0209 (12) | 0.0385 (13) | −0.0007 (9) | −0.0104 (10) | −0.0120 (10) |
N3 | 0.0525 (15) | 0.0229 (12) | 0.0296 (12) | −0.0110 (11) | −0.0067 (11) | −0.0107 (10) |
N4 | 0.0625 (17) | 0.0285 (14) | 0.0600 (17) | −0.0056 (12) | −0.0316 (14) | −0.0185 (13) |
C1 | 0.0240 (12) | 0.0243 (14) | 0.0288 (13) | −0.0051 (10) | −0.0005 (10) | −0.0066 (11) |
C2 | 0.0273 (13) | 0.0208 (13) | 0.0288 (13) | −0.0066 (10) | 0.0010 (10) | −0.0069 (11) |
C3 | 0.0259 (13) | 0.0218 (13) | 0.0250 (12) | −0.0032 (10) | −0.0005 (10) | −0.0060 (11) |
C4 | 0.0239 (12) | 0.0234 (14) | 0.0273 (13) | −0.0038 (10) | −0.0009 (10) | −0.0077 (11) |
C5 | 0.0267 (13) | 0.0240 (14) | 0.0338 (14) | 0.0004 (10) | −0.0028 (11) | −0.0119 (12) |
C6 | 0.0265 (13) | 0.0310 (15) | 0.0389 (15) | −0.0043 (11) | −0.0037 (11) | −0.0152 (13) |
C7 | 0.0300 (14) | 0.0257 (15) | 0.0416 (15) | −0.0041 (11) | −0.0019 (12) | −0.0153 (13) |
C8 | 0.0256 (13) | 0.0246 (14) | 0.0354 (14) | −0.0014 (10) | −0.0016 (11) | −0.0125 (12) |
C9 | 0.0207 (12) | 0.0269 (14) | 0.0299 (13) | −0.0044 (10) | 0.0010 (10) | −0.0089 (11) |
C10 | 0.0311 (14) | 0.0240 (14) | 0.0366 (15) | −0.0069 (11) | −0.0026 (12) | −0.0065 (12) |
C11 | 0.0308 (14) | 0.0220 (14) | 0.0465 (17) | −0.0028 (11) | −0.0034 (12) | −0.0099 (13) |
C12 | 0.0268 (13) | 0.0188 (13) | 0.0336 (14) | −0.0023 (10) | −0.0065 (11) | −0.0061 (11) |
C13 | 0.0261 (13) | 0.0150 (13) | 0.0379 (14) | −0.0004 (10) | −0.0057 (11) | −0.0067 (11) |
C14 | 0.0246 (13) | 0.0301 (16) | 0.0555 (18) | −0.0004 (11) | −0.0057 (12) | −0.0186 (14) |
C15 | 0.0319 (14) | 0.0318 (16) | 0.0440 (16) | −0.0014 (12) | 0.0000 (12) | −0.0162 (14) |
C16 | 0.0350 (15) | 0.0324 (16) | 0.0402 (16) | −0.0012 (12) | 0.0003 (12) | −0.0131 (14) |
C17 | 0.0294 (13) | 0.0281 (15) | 0.0371 (15) | −0.0019 (11) | −0.0072 (11) | −0.0102 (12) |
C18 | 0.0413 (15) | 0.0230 (14) | 0.0255 (13) | −0.0078 (12) | −0.0068 (11) | −0.0081 (11) |
C19 | 0.0386 (14) | 0.0244 (14) | 0.0201 (12) | −0.0106 (11) | −0.0022 (11) | −0.0077 (11) |
C20 | 0.0354 (14) | 0.0232 (14) | 0.0258 (13) | −0.0089 (11) | −0.0023 (11) | −0.0102 (11) |
C21 | 0.0457 (16) | 0.0197 (13) | 0.0235 (13) | −0.0080 (11) | −0.0043 (11) | −0.0083 (11) |
C22 | 0.0469 (16) | 0.0258 (15) | 0.0300 (14) | −0.0127 (12) | −0.0069 (12) | −0.0121 (12) |
C23 | 0.0470 (16) | 0.0283 (15) | 0.0272 (13) | −0.0104 (12) | −0.0108 (12) | −0.0106 (12) |
C24 | 0.0422 (15) | 0.0213 (14) | 0.0254 (13) | −0.0069 (11) | −0.0070 (11) | −0.0073 (11) |
F1—C10 | 1.333 (3) | C4—C5 | 1.423 (4) |
F2—C10 | 1.329 (3) | C4—C9 | 1.425 (4) |
F3—C10 | 1.318 (3) | C5—C6 | 1.359 (4) |
F4—C11 | 1.346 (3) | C5—H5 | 0.9500 |
F5—C11 | 1.338 (3) | C6—C7 | 1.414 (4) |
F6—C11 | 1.345 (3) | C6—H6A | 0.9500 |
O1—C12 | 1.417 (3) | C7—C8 | 1.367 (4) |
O1—H1 | 0.839 (10) | C7—H7 | 0.9500 |
O2—C18 | 1.249 (3) | C8—C9 | 1.419 (4) |
O3—C18 | 1.248 (3) | C8—C11 | 1.501 (4) |
O4—N3 | 1.223 (3) | C12—C13 | 1.540 (3) |
O5—N3 | 1.230 (3) | C12—H12A | 1.0000 |
O1W—H1W1 | 0.843 (10) | C13—C17 | 1.523 (4) |
O1W—H1W2 | 0.843 (10) | C13—H13 | 1.0000 |
O2W—H2W1 | 0.849 (10) | C14—C15 | 1.516 (4) |
O2W—H2W2 | 0.845 (10) | C14—H14A | 0.9900 |
O3W—H2W2 | 1.36 (5) | C14—H14B | 0.9900 |
O3W—H3W1 | 0.843 (10) | C15—C16 | 1.532 (4) |
O3W—H3W2 | 0.843 (10) | C15—H15A | 0.9900 |
N1—C1 | 1.307 (3) | C15—H15B | 0.9900 |
N1—C9 | 1.370 (3) | C16—C17 | 1.518 (4) |
N2—C14 | 1.499 (3) | C16—H16A | 0.9900 |
N2—C13 | 1.502 (3) | C16—H16B | 0.9900 |
N2—H21 | 0.885 (10) | C17—H17A | 0.9900 |
N2—H22 | 0.886 (10) | C17—H17B | 0.9900 |
N3—C21 | 1.481 (3) | C18—C19 | 1.513 (4) |
N4—C23 | 1.374 (4) | C19—C24 | 1.384 (4) |
N4—H41 | 0.881 (10) | C19—C20 | 1.389 (4) |
N4—H42 | 0.877 (10) | C20—C21 | 1.384 (3) |
C1—C2 | 1.409 (4) | C20—H20 | 0.9500 |
C1—C10 | 1.506 (4) | C21—C22 | 1.368 (4) |
C2—C3 | 1.382 (4) | C22—C23 | 1.399 (4) |
C2—H2A | 0.9500 | C22—H22A | 0.9500 |
C3—C4 | 1.420 (4) | C23—C24 | 1.399 (4) |
C3—C12 | 1.520 (3) | C24—H24 | 0.9500 |
C12—O1—H1 | 105 (2) | O1—C12—C3 | 111.4 (2) |
H1W1—O1W—H1W2 | 108.9 (18) | O1—C12—C13 | 108.89 (19) |
H2W1—O2W—H2W2 | 107.6 (17) | C3—C12—C13 | 110.1 (2) |
H2W2—O3W—H3W1 | 114 (6) | O1—C12—H12A | 108.8 |
H2W2—O3W—H3W2 | 49 (6) | C3—C12—H12A | 108.8 |
H3W1—O3W—H3W2 | 108.9 (18) | C13—C12—H12A | 108.8 |
C1—N1—C9 | 116.9 (2) | N2—C13—C17 | 109.3 (2) |
C14—N2—C13 | 113.7 (2) | N2—C13—C12 | 106.8 (2) |
C14—N2—H21 | 108.8 (18) | C17—C13—C12 | 115.0 (2) |
C13—N2—H21 | 103.5 (19) | N2—C13—H13 | 108.5 |
C14—N2—H22 | 105.2 (18) | C17—C13—H13 | 108.5 |
C13—N2—H22 | 112.4 (19) | C12—C13—H13 | 108.5 |
H21—N2—H22 | 113 (3) | N2—C14—C15 | 111.1 (2) |
O4—N3—O5 | 122.9 (2) | N2—C14—H14A | 109.4 |
O4—N3—C21 | 119.5 (2) | C15—C14—H14A | 109.4 |
O5—N3—C21 | 117.6 (2) | N2—C14—H14B | 109.4 |
C23—N4—H41 | 114 (2) | C15—C14—H14B | 109.4 |
C23—N4—H42 | 118 (2) | H14A—C14—H14B | 108.0 |
H41—N4—H42 | 117 (3) | C14—C15—C16 | 110.9 (2) |
N1—C1—C2 | 125.9 (2) | C14—C15—H15A | 109.5 |
N1—C1—C10 | 114.0 (2) | C16—C15—H15A | 109.5 |
C2—C1—C10 | 120.1 (2) | C14—C15—H15B | 109.5 |
C3—C2—C1 | 118.1 (2) | C16—C15—H15B | 109.5 |
C3—C2—H2A | 121.0 | H15A—C15—H15B | 108.1 |
C1—C2—H2A | 121.0 | C17—C16—C15 | 110.0 (2) |
C2—C3—C4 | 118.5 (2) | C17—C16—H16A | 109.7 |
C2—C3—C12 | 119.6 (2) | C15—C16—H16A | 109.7 |
C4—C3—C12 | 121.8 (2) | C17—C16—H16B | 109.7 |
C3—C4—C5 | 123.5 (2) | C15—C16—H16B | 109.7 |
C3—C4—C9 | 118.3 (2) | H16A—C16—H16B | 108.2 |
C5—C4—C9 | 118.2 (2) | C16—C17—C13 | 111.5 (2) |
C6—C5—C4 | 120.8 (2) | C16—C17—H17A | 109.3 |
C6—C5—H5 | 119.6 | C13—C17—H17A | 109.3 |
C4—C5—H5 | 119.6 | C16—C17—H17B | 109.3 |
C5—C6—C7 | 120.8 (2) | C13—C17—H17B | 109.3 |
C5—C6—H6A | 119.6 | H17A—C17—H17B | 108.0 |
C7—C6—H6A | 119.6 | O3—C18—O2 | 123.9 (2) |
C8—C7—C6 | 120.3 (2) | O3—C18—C19 | 117.8 (2) |
C8—C7—H7 | 119.9 | O2—C18—C19 | 118.3 (2) |
C6—C7—H7 | 119.9 | C24—C19—C20 | 120.2 (2) |
C7—C8—C9 | 120.2 (2) | C24—C19—C18 | 119.9 (2) |
C7—C8—C11 | 119.6 (2) | C20—C19—C18 | 119.8 (2) |
C9—C8—C11 | 120.1 (2) | C21—C20—C19 | 117.0 (2) |
N1—C9—C8 | 118.1 (2) | C21—C20—H20 | 121.5 |
N1—C9—C4 | 122.2 (2) | C19—C20—H20 | 121.5 |
C8—C9—C4 | 119.6 (2) | C22—C21—C20 | 124.0 (2) |
F3—C10—F2 | 108.0 (2) | C22—C21—N3 | 117.7 (2) |
F3—C10—F1 | 106.2 (2) | C20—C21—N3 | 118.2 (2) |
F2—C10—F1 | 105.0 (2) | C21—C22—C23 | 119.0 (2) |
F3—C10—C1 | 112.7 (2) | C21—C22—H22A | 120.5 |
F2—C10—C1 | 112.3 (2) | C23—C22—H22A | 120.5 |
F1—C10—C1 | 112.1 (2) | N4—C23—C24 | 120.7 (2) |
F5—C11—F6 | 106.4 (2) | N4—C23—C22 | 121.4 (2) |
F5—C11—F4 | 106.9 (2) | C24—C23—C22 | 117.8 (2) |
F6—C11—F4 | 105.7 (2) | C19—C24—C23 | 121.9 (2) |
F5—C11—C8 | 113.6 (2) | C19—C24—H24 | 119.1 |
F6—C11—C8 | 112.1 (2) | C23—C24—H24 | 119.1 |
F4—C11—C8 | 111.6 (2) | ||
C9—N1—C1—C2 | 3.1 (4) | C9—C8—C11—F4 | 61.3 (3) |
C9—N1—C1—C10 | −178.5 (2) | C2—C3—C12—O1 | 18.0 (3) |
N1—C1—C2—C3 | −2.3 (4) | C4—C3—C12—O1 | −164.9 (2) |
C10—C1—C2—C3 | 179.3 (2) | C2—C3—C12—C13 | −102.9 (3) |
C1—C2—C3—C4 | −0.9 (3) | C4—C3—C12—C13 | 74.2 (3) |
C1—C2—C3—C12 | 176.3 (2) | C14—N2—C13—C17 | −55.4 (3) |
C2—C3—C4—C5 | −177.6 (2) | C14—N2—C13—C12 | 179.6 (2) |
C12—C3—C4—C5 | 5.3 (4) | O1—C12—C13—N2 | 66.0 (2) |
C2—C3—C4—C9 | 3.0 (3) | C3—C12—C13—N2 | −171.6 (2) |
C12—C3—C4—C9 | −174.1 (2) | O1—C12—C13—C17 | −55.4 (3) |
C3—C4—C5—C6 | −177.9 (2) | C3—C12—C13—C17 | 67.0 (3) |
C9—C4—C5—C6 | 1.4 (4) | C13—N2—C14—C15 | 55.0 (3) |
C4—C5—C6—C7 | 0.7 (4) | N2—C14—C15—C16 | −54.2 (3) |
C5—C6—C7—C8 | −1.0 (4) | C14—C15—C16—C17 | 56.0 (3) |
C6—C7—C8—C9 | −0.9 (4) | C15—C16—C17—C13 | −57.8 (3) |
C6—C7—C8—C11 | 177.1 (2) | N2—C13—C17—C16 | 56.6 (3) |
C1—N1—C9—C8 | −179.1 (2) | C12—C13—C17—C16 | 176.7 (2) |
C1—N1—C9—C4 | −0.6 (3) | O3—C18—C19—C24 | −178.8 (2) |
C7—C8—C9—N1 | −178.4 (2) | O2—C18—C19—C24 | 1.1 (3) |
C11—C8—C9—N1 | 3.6 (3) | O3—C18—C19—C20 | −0.2 (3) |
C7—C8—C9—C4 | 3.0 (4) | O2—C18—C19—C20 | 179.7 (2) |
C11—C8—C9—C4 | −175.0 (2) | C24—C19—C20—C21 | 0.9 (3) |
C3—C4—C9—N1 | −2.3 (3) | C18—C19—C20—C21 | −177.7 (2) |
C5—C4—C9—N1 | 178.3 (2) | C19—C20—C21—C22 | −0.8 (4) |
C3—C4—C9—C8 | 176.1 (2) | C19—C20—C21—N3 | 178.9 (2) |
C5—C4—C9—C8 | −3.2 (3) | O4—N3—C21—C22 | −176.4 (2) |
N1—C1—C10—F3 | 170.9 (2) | O5—N3—C21—C22 | 4.3 (3) |
C2—C1—C10—F3 | −10.5 (3) | O4—N3—C21—C20 | 3.9 (3) |
N1—C1—C10—F2 | −66.8 (3) | O5—N3—C21—C20 | −175.4 (2) |
C2—C1—C10—F2 | 111.7 (3) | C20—C21—C22—C23 | 0.0 (4) |
N1—C1—C10—F1 | 51.2 (3) | N3—C21—C22—C23 | −179.6 (2) |
C2—C1—C10—F1 | −130.3 (2) | C21—C22—C23—N4 | −177.1 (3) |
C7—C8—C11—F5 | 122.3 (3) | C21—C22—C23—C24 | 0.6 (4) |
C9—C8—C11—F5 | −59.7 (3) | C20—C19—C24—C23 | −0.3 (4) |
C7—C8—C11—F6 | 1.7 (3) | C18—C19—C24—C23 | 178.3 (2) |
C9—C8—C11—F6 | 179.7 (2) | N4—C23—C24—C19 | 177.3 (3) |
C7—C8—C11—F4 | −116.7 (3) | C22—C23—C24—C19 | −0.4 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2 | 0.84 (1) | 1.83 (1) | 2.669 (3) | 178 (3) |
N4—H41···O2i | 0.88 (1) | 2.04 (1) | 2.900 (3) | 164 (3) |
N2—H21···O3ii | 0.89 (1) | 1.87 (1) | 2.717 (3) | 159 (3) |
N4—H42···O5iii | 0.88 (1) | 2.27 (2) | 3.101 (3) | 159 (3) |
N2—H22···O2W | 0.89 (1) | 2.05 (1) | 2.916 (4) | 165 (3) |
N2—H22···O3W | 0.89 (1) | 1.98 (2) | 2.727 (5) | 141 (3) |
OWw—H1W1···O1 | 0.84 (1) | 2.08 (4) | 2.867 (5) | 156 (8) |
O1W—H1W2···F6iv | 0.84 (1) | 2.47 (7) | 2.867 (5) | 110 (6) |
O2W—H2W1···O1W | 0.85 (1) | 2.07 (2) | 2.859 (6) | 154 (4) |
O2W—H2W2···O4v | 0.85 (1) | 2.30 (2) | 3.119 (4) | 165 (4) |
O3W—H3W1···O3 | 0.84 (1) | 2.21 (1) | 3.049 (5) | 174 (7) |
O3W—H3W2···O4v | 0.84 (1) | 2.37 (3) | 3.158 (5) | 156 (7) |
O3W—H3W2···O5v | 0.84 (1) | 2.32 (6) | 3.016 (5) | 140 (7) |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) −x, −y+2, −z+1; (iii) −x+1, −y+3, −z+1; (iv) x, y+1, z; (v) −x, −y+3, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C17H17F6N2O+·C7H5N2O4−·1.5H2O |
Mr | 587.48 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 120 |
a, b, c (Å) | 9.1705 (5), 12.5446 (9), 12.7788 (8) |
α, β, γ (°) | 66.278 (4), 77.261 (4), 71.537 (4) |
V (Å3) | 1269.23 (14) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.14 |
Crystal size (mm) | 0.28 × 0.16 × 0.10 |
Data collection | |
Diffractometer | Bruker–Nonius APEXII CCD camera on κ-goniostat diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2007) |
Tmin, Tmax | 0.640, 0.746 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 25681, 5832, 3477 |
Rint | 0.078 |
(sin θ/λ)max (Å−1) | 0.652 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.064, 0.174, 1.03 |
No. of reflections | 5832 |
No. of parameters | 416 |
No. of restraints | 15 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.39, −0.38 |
Computer programs: , DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2 | 0.839 (10) | 1.831 (11) | 2.669 (3) | 178 (3) |
N4—H41···O2i | 0.881 (10) | 2.043 (14) | 2.900 (3) | 164 (3) |
N2—H21···O3ii | 0.885 (10) | 1.871 (14) | 2.717 (3) | 159 (3) |
N4—H42···O5iii | 0.877 (10) | 2.266 (16) | 3.101 (3) | 159 (3) |
N2—H22···O2W | 0.886 (10) | 2.051 (13) | 2.916 (4) | 165 (3) |
N2—H22···O3W | 0.886 (10) | 1.98 (2) | 2.727 (5) | 141 (3) |
OWw—H1W1···O1 | 0.843 (10) | 2.08 (4) | 2.867 (5) | 156 (8) |
O1W—H1W2···F6iv | 0.843 (10) | 2.47 (7) | 2.867 (5) | 110 (6) |
O2W—H2W1···O1W | 0.849 (10) | 2.07 (2) | 2.859 (6) | 154 (4) |
O2W—H2W2···O4v | 0.845 (10) | 2.295 (18) | 3.119 (4) | 165 (4) |
O3W—H3W1···O3 | 0.843 (10) | 2.209 (14) | 3.049 (5) | 174 (7) |
O3W—H3W2···O4v | 0.843 (10) | 2.37 (3) | 3.158 (5) | 156 (7) |
O3W—H3W2···O5v | 0.843 (10) | 2.32 (6) | 3.016 (5) | 140 (7) |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) −x, −y+2, −z+1; (iii) −x+1, −y+3, −z+1; (iv) x, y+1, z; (v) −x, −y+3, −z+1. |
Footnotes
‡Additional correspondence author, e-mail: j.wardell@abdn.ac.uk.
Acknowledgements
The use of the EPSRC X-ray crystallographic service at the University of Southampton, England, and the valuable assistance of the staff there is gratefully acknowledged. JLW acknowledges support from CAPES and FAPEMIG (Brazil).
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.
A synthetic analogue of quinine, mefloquine, is manufactured as the racemic erythro hydrochloride salt, and is used in the prevention and treatment of malaria in combination with other drugs (Maguire et al., 2006). While it is known that both enantiomers of erythro mefloquinium hydrochloride are active, the (+) form is the more potent against the D6 and W2 strains of Plasmodium falciparum (Karle & Karle, 2002). After its introduction in 1971, mefloquine has proved to be an effective anti-malarial agent, in part due to its long half-life and the fact that it is a good prophylactic. A widespread resistance of Plasmodium sp. developed by the end of the 20th century. This, together with undesirable side-effects [e.g. anxiety, aggression, seizures, nightmares, neuropathy, insomnia, acute depression and urinary disorders] have resulted in a decline in its use (Dow et al., 2004). Derivatives of mefloquine are also been investigated against for efficacy against other diseases, e.g. as anti-viral and anti-tuberculosis agents (Kunin & Ellis, 2007). A few crystal structures of mefloquine (Skórska et al., 2005) and mefloquinium salts, including the hydrated chloride (Karle & Karle, 2002; Skórska et al., 2005), methylsulfonate (Karle & Karle, 1991), tetrachlorocobaltate (Skórska et al., 2005), and tetrachlorocuprate and tetrabromocadmate salts (Obaleye et al., 2009) have been reported. We now report the structure of the title salt, (I), in continuation of structural studies in this area (Wardell et al., 2010; Wardell et al., 2011).
The asymmetric unit of (I) comprises a piperidin-1-ium cation, a 3-amino-5-nitrobenzoate anion, and three fractionally occupied [i.e. 0.414 (3), 0.627 (6) and 0.459 (5)] disordered water molecules of solvation; the ions are illustrated in Fig. 1. The confirmation of protonation at the amine-N2 atom is found in the nature of the intermolecular interactions, see below, as well as in the equivalence of the C—O bond distances [O2—C18 = 1.251 (4) Å and O3—C18 = 1.246 (4) Å] in the anion. Overall, the cation has an L-shaped conformation as the quinolinyl residue is approximately orthogonal to the rest of the cation; the C2–C3–C12–C13 torsion angle is -102.9 (3) °. The six-membered piperidin-1-ium ring adopts a chair conformation. The anion is effectively planar with both of the carboxylate [O2—C18—C19—C20 torsion angle = 179.7 (2)°] and nitro [O4—N3—C21—C20 torsion angle = -3.9 (3)°] groups being co-planar with the benzene ring to which it is connected
The crystal packing is stabilized by hydrogen bonding, Table 1, that leads to layers in the ab plane. The carboxylate-O2 atom accepts two hydrogen bonds, one from the cation-OH and the other from the anion-amino-H. The carboxylate-O3 atom accepts a single interaction, i.e. from an ammonium-H. The second amino-H atom connects to nitro-O while the second ammonium-H hydrogen bonds water-O atoms. Water molecules form hydrogen bonds with each other and also donor hydrogen bonds to the cation-O atom, anion-O atoms and a weak contact to the F6 atom, Table 1. A view of the unit-cell contents is shown in Fig. 2 indicating layers stack along the c axis.