2-{[2,8-Bis(tri­fluoro­meth­yl)quinolin-4-yl](hy­dr­oxy)meth­yl}piperidin-1-ium tri­chloro­acetate: crystal structure and Hirshfeld surface analysis

The asymmetric unit of the centrosymmetric title salt, C₁₇H₁₇F₆N₂O⁺·C₂Cl₃O₂⁻, comprises a single ion-pair. The hy­droxy-O and ammonium-N atoms lie to the same side of the cation, a disposition maintained by a charge-assisted ammonium-N—H⋯O(hy­droxy) hydrogen bond [the O_h—C_m—C_m–N_a (h = hy­droxy, m = methine, a = ammonium) torsion angle is 58.90 (19)°]. The piperidin-1-ium group is approximately perpendicular to the quinolinyl residue [C_q—C_m—C_m–N_a (q = quinolin­yl) is −178.90 (15)°] so that the cation, to a first approximation, has the shape of the letter L. The most prominent feature of the supra­molecular association in the crystal is the formation of chains along the a-axis direction, being stabilized by charge-assisted hydrogen-bonds. Thus, ammonium-N⁺—H⋯O⁻(carboxyl­ate) hydrogen bonds are formed whereby two ammonium cations bridge a pair of carboxyl­ate-O atoms, leading to eight-membered {⋯O⋯HNH}₂ synthons. The resulting four-ion aggregates are linked into the supra­molecular chain via charge-assisted hydroxyl-O—H⋯O⁻(carboxyl­ate) hydrogen bonds. The connections between the chains, leading to a three-dimensional architecture, are of the type C—X⋯π, for X = Cl and F. The analysis of the calculated Hirshfeld surface points to the importance of X⋯H contacts to the surface (X = F, 25.4% and X = Cl, 19.7%) along with a significant contribution from O⋯H hydrogen-bonds (10.2%). Conversely, H⋯H contacts, at 12.4%, make a relatively small contribution to the surface.

1. Chemical context

Kryptoracemic behaviour is an inter­esting but rare phenomenon whereby enanti­omeric mol­ecules crystallize in one of the 65 Sohncke space groups. Sohncke space groups lack an inversion centre, a rotatory inversion axis, a glide plane or a mirror plane, implying Z′ would usually be greater than 1 (unless the mol­ecule lies on a rotation axis) and in which enanti­omeric mol­ecules, when present, are related by a non-crystallographic symmetry, e.g. a non-crystallographic centre of inversion. Reviews of this phenomenon have appeared for organic compounds (Fábián & Brock, 2010) and for coordination complexes (Bernal & Watkins, 2015). For organic mol­ecules, kryptoracemic behaviour is uncommon and is found in only 0.1% of structures (Fábián & Brock, 2010). It is therefore of inter­est that pharmacologically relevant (Gonçalves et al., 2012) mefloquine/derivatives, for which there are about 30 structures included in the Cambridge Structural Database (Groom et al., 2016), present two examples of krypto­racemates (Jotani et al., 2016; Wardell, Wardell et al., 2016). In order to investigate reasons for this seemingly high propensity towards kryptoracemic behaviour in mefloquine derivatives, crystallographic studies of different mefloquinium salts have subsequently been performed (Wardell et al., 2018) and in a continuation of these, herein the crystal and mol­ecular structures of the title salt, (I), isolated from the 1:1 crystallization of racemic mefloquine and tri­chloro­acetic acid are described. This is complemented by an analysis of its calculated Hirshfeld surface.

2. Structural commentary

The two ions comprising the asymmetric unit of salt (I) are shown in Fig. 1. The crystal of (I) is racemic. Each cation contains two chiral centres and the illustrated cation in the arbitrarily chosen asymmetric unit is S at C12 and R at C13, i.e. conforming to the [(−)-erythro-mefloquinium] isomer. That protonation from the carb­oxy­lic acid to the base occurred during co-crystallization is readily seen in the equivalence of the C18 O2, O3 bond lengths, i.e. 1.238 (3) and 1.245 (3) Å, respectively. The formation of the piperidin-1-ium cation is supported by the pattern of hydrogen bonding involving the ammonium-N—H H atoms. Indeed, an intra­molecular ammonium-N⁺—H⋯O(hy­droxy) hydrogen bond is formed ensuring the hydroxyl-O1 and ammonium-N2 atoms are orientated to the same side of the cation with the O1—C12—C13—N2 torsion angle of 58.90 (19)° angle indicating a + syn-clinal relationship. The r.m.s. deviation for the 10 atoms comprising the quinolinyl residue is 0.0147 Å, with the hy­droxy-O1 [−0.299 (3) Å] and ammonium-N2 [1.490 (4) Å] atoms lying to either side of the plane. The dihedral angle of 74.00 (5)° formed between the fused ring system and the best plane through the piperidin-1-ium ring indicates that, overall, the mol­ecule has the shape of the letter L. This is confirmed by the +syn-clinal C3—C12—C13—C17 torsion angle of 60.1 (2)°.

Figure 1 The mol­ecular structures of the two ions comprising the asymmetric unit of (I) showing the atom-labelling scheme and displacement ellipsoids at the 70% probability level. The dashed line signifies an N—H⋯O hydrogen bond.

In the anion, the r.m.s. deviation through the C₂O₂ atoms is 0.0131 Å with the Cl3 atom lying to one side of the plane [deviation = 1.7153 (3) Å] whereas the Cl1 [−0.9341 (3) Å] and Cl2 [−0.6170 (4) Å] atoms lie to the other side.

3. Supra­molecular features

The presence of charge-assisted hydrogen bonds between the constituent ions lead to linear, supra­molecular chains along the a-axis direction in the crystal of (I), Table 1 and Fig. 2(a). The most prominent feature of the packing is the formation of centrosymmetric, eight-membered {⋯O⋯HNH}₂ synthons, which arise as a result of ammonium-N⁺—H⋯O⁻(carboxylate) hydrogen bonds whereby two ammonium cations bridge, via both hydrogen atoms, a pair of carboxyl­ate-O2 atoms. The four-ion aggregates are linked into the chain via charge-assisted hydroxyl-O—H⋯O⁻(carboxyl­ate) hydrogen bonds. These lead to larger centrosymmetric agglomerates, i.e. 18-membered {⋯OCO⋯HOC₂NH}₂ synthons. The connections between the chains are of the type C—X⋯π, for X = Cl and F. Such inter­actions are inherently weak, providing energies of stabilization less than 4 kcal mol⁻¹, with those for inter­actions involving chloride atoms being greater than those with fluoride (Tsuzuki et al., 2016). In the crystal of (I), C—Cl⋯π(C₆-quinolin­yl) inter­actions are formed whereby the C—Cl bond is approximately parallel to the C₆ ring. Each of the fluoride atoms bound to the C10 atom participates in a C—F⋯π contact as these CF₃ groups lie in regions flanked by quinolinyl residues. Two of the contacts are as for the chloride atom, i.e. side on, whereas the other is best described as an end-on C—F⋯π contact as the angle subtended at the F1 atom is 170.95 (14)°. The aforementioned inter­actions combine to form a three-dimensional architecture. A view of the unit-cell contents is shown in Fig. 2(b).

Table 1
Hydrogen-bond geometry (Å, °)

Cg1 and Cg2 are the centroids of the C4–C9 and N1/C1–C4/C9 rings, respectively.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H1N⋯O1	0.88 (2)	2.42 (2)	2.734 (3)	102 (2)
N2—H1N⋯O2^i	0.88 (2)	1.99 (2)	2.769 (3)	146 (2)
O1—H1O⋯O3^ii	0.83 (2)	1.89 (2)	2.702 (2)	165 (2)
N2—H2N⋯O2	0.88 (2)	2.00 (2)	2.869 (2)	173 (2)
N2—H2N⋯O3	0.88 (2)	2.47 (2)	3.043 (3)	124 (1)
C19—Cl3⋯Cg1^iii	1.78 (1)	3.61 (1)	4.709 (3)	118 (1)
C10—F1⋯Cg2^iv	1.34 (1)	3.07 (1)	4.395 (2)	171 (1)
C10—F2⋯Cg1^ii	1.34 (1)	3.44 (1)	3.788 (2)	95 (1)
C10—F3⋯Cg1^ii	1.32 (1)	3.24 (1)	3.788 (2)	104 (1)
Symmetry codes: (i) -x+1, -y, -z+1; (ii) x-1, y, z; (iii) -x+1, -y+1, -z+1; (iv) -x, -y, -z+2.

Figure 2 Mol­ecular packing in (I): (a) The supra­molecular chain along the a axis, being sustained by O—H⋯O and N—H⋯O hydrogen bonding with non-participating H atoms omitted and (b) a view of the unit-cell contents shown in projection down the a axis, the axis of propagation of the chain shown in (a). The C—Cl⋯π and C—F⋯π inter­actions are shown as pink and purple dashed lines, respectively.

4. Hirshfeld surface analysis

The Hirshfeld surface calculations for the title salt (I) were performed in accord with an earlier publication on a related organic salt (Jotani et al., 2018). This analysis provides a convenient means to describe the formation of the salt through the charge-assisted N—H⋯O hydrogen bonds and C—H⋯O contacts, and the influence of weak inter­actions involving halide substituents in the crystal. The pair of overlapping bright-red spots near the ammonium-H2N atom and carboxyl­ate-O2 and O3 atoms of the anion on the Hirshfeld surfaces mapped over d_norm in Fig. 3 represent the charge-assisted N—H⋯O hydrogen-bonds; the methyl­ene-C13—H⋯O3 contact, Table 2, on the Hirshfeld surface is evident as the diminutive-red spot between the respective atoms in Fig. 3(b). The presence of bright- and broad-red spots near the ammonium-H1N and H2N, hydroxyl-H1O, carboxyl­ate-O2 and O3 atoms on the d_norm-mapped Hirshfeld surfaces indicate the influence of the charge-assisted N—H⋯O and O—H⋯O hydrogen bonds, as indicated in Fig. 4(a) and (b). The donors and acceptors of inter­molecular inter­actions in the crystals of (I) are also highlighted with blue and red regions corresponding to positive and negative electrostatic potentials, respectively, on the Hirshfeld surfaces mapped over electrostatic potentials in Fig. 5. The presence of the faint-red spots near the CF₃ atoms as well as the other atoms of the cation, Fig. 4(a) and (c), and the Cl1 atom, Fig. 3(b), indicate the involvement of these atoms in short inter­atomic contacts, Table 2. The effect of inter­molecular C—X⋯π inter­actions (X = F, Cl), Table 1, is illustrated in Fig. 6 through the blue and orange regions near the respective donors and acceptors on the Hirshfeld surfaces mapped with shape-index properties.

Table 2
Summary of short inter­atomic contacts (Å) in (I)^a

Contact	Distance	Symmetry operation
C1⋯F1	3.130 (2)	−x, −y, 2 − z
C7⋯F3	3.127 (3)	1 + x, y, z
O3⋯H13	2.49	x, y, z
F1⋯F2	2.8618 (18)	−1 − x, −y, 2 − z
F1⋯H17B	2.58	−x, −y, 2 − z
F5⋯Cl1	3.2065 (16)	1 − x, 1 − y, 1 − z
F2⋯H13	2.46	−1 + x, y, z
Note: (a) Values are as calculated in CrystalExplorer (Spackman & Jayatilaka, 2009).

Figure 3 Views of the Hirshfeld surface of (I) mapped over dnorm in the range −0.171 to +1.475 a.u. for the (a) cation and (b) anion, highlighting N—H⋯O and C—H⋯O contacts as black dashed lines.

Figure 4 Views of the Hirshfeld surface of (I) mapped over dnorm in the range −0.121 to +1.475 a.u. for the (a) cation, (b) anion and (c) ion pair. The N—H⋯O, O—H⋯O and C—H⋯O contacts are shown as black dashed lines. The faint-red spots near the labelled atoms in (b) and (c) indicate the short inter­atomic contacts (see text and Table 2).

Figure 5 A view of the Hirshfeld surface of (I) mapped over the electrostatic potential in the range −0.128 to + 0.215 a.u. The red and blue regions represent negative and positive electrostatic potentials, respectively.

Figure 6 Three views of Hirshfeld surface of (I) mapped over the shape-index property highlighting (a) C—Cl⋯π/π⋯Cl—C contacts through yellow dotted lines, (b) and (c) C—F⋯π/π⋯F—C contacts with through black dotted lines. The `1′, `2′ and `3′ refer to the F1—F3 atoms, respectively

The overall two-dimensional fingerprint plot for (I), Fig. 7, and those delineated into H⋯H, O⋯H/H⋯O, F⋯H/H⋯F, F⋯F, C⋯F/F⋯C, C⋯Cl/Cl⋯C, Cl⋯H/H⋯Cl and Cl⋯Cl contacts (McKinnon et al., 2007) are illustrated in Fig. 7; the percentage contributions from the different inter­atomic contacts to the Hirshfeld surfaces are summarized in Table 3. The relatively small contribution, i.e. 12.4%, from H⋯H contacts to the Hirshfeld surfaces of (I) is due to the presence of terminal halide substituents in both the cation and anion and their relatively high contribution to a major portion of the surface.

Table 3
Percentage contributions of inter­atomic contacts to the Hirshfeld surface for (I)

	Percentage contribution
Contact	(I)
H⋯H	12.4
O⋯H/H⋯O	10.2
F⋯H/H⋯F	25.4
F⋯F	7.7
Cl⋯H/H⋯Cl	19.7
C⋯F/F⋯C	5.4
C⋯Cl/Cl⋯C	5.3
Cl⋯Cl	4.6
C⋯H/H⋯C	3.4
Cl⋯F/F⋯Cl	2.7
N⋯H/H⋯N	1.3
N⋯F/F⋯N	1.0
O⋯O	0.5
C⋯C	0.3
C⋯O/O⋯C	0.2
Cl⋯O/O⋯Cl	0.1

Figure 7 The full two-dimensional fingerprint plot for (I) and those delineated into H⋯H, O⋯H/H⋯O, F⋯H/H⋯F, F⋯F, C⋯F/F⋯C, C⋯Cl/Cl⋯C, Cl⋯H/H⋯Cl and Cl⋯Cl contacts.

The inter­molecular N—H⋯O and O—H⋯O hydrogen-bonds in the packing of (I) indicate a significant contribution from O⋯H/H⋯O contacts to the surface and these are evident as the two pairs of superimposed long spikes with the tips at d_e + d_i ∼1.7 Å in the delineated fingerprint plot. The largest percentage contribution to the Hirshfeld surface are from F⋯H/H⋯F contacts, i.e. 25.4%. This is due to the presence of a number of short inter­atomic H⋯F contacts, Table 2, which are characterized as the pair of short spikes at d_e + d_i ∼ 2.5 Å in the corresponding delineated fingerprint plot. An arrow-like tip at d_e + d_i ∼ 2.8 Å in the fingerprint delineated into F⋯F contacts is due to the effect of the short inter­atomic F⋯F contact summarized in Table 2. The presence of short inter­atomic C⋯F/F⋯C contacts, Table 2, and C—F⋯π contacts (Table 1) involving fluoride atoms substituted at the methyl-C10 atom is evident from the forceps-like distribution of points in the fingerprint plot delin­eated into these contacts. The C—Cl⋯π contact, Table 1, involving the carboxyl­ate-Cl3 atom, Fig. 6(a), is viewed as the spear-shaped distribution of points with the pair of adjoining tips at d_e + d_i ∼ 3.5 Å in the fingerprint plot delineated into C⋯Cl/Cl⋯C contacts. Although the inter­atomic Cl⋯H/H⋯Cl and Cl⋯Cl contacts make significant contributions to the Hirshfeld surface of (I), Table 3, and are reflected in the forceps-like and pencil-tip like distributions of points, respectively, in their delineated fingerprint plots, they occur at van der Waals separations. The small contribution from the other inter­atomic contacts to the Hirshfeld surface of (I), listed in Table 3, show negligible influence upon the packing.

5. Database survey

As noted in the Chemical context, there are two mefloquine derivatives that exhibit kryptoracemic behaviour with both examples being isolated after attempts at chiral resolution of racemic mefloquine with different carb­oxy­lic acids. In one example, two mefloquinium cations are related across a pseudo centre of inversion, and the charge balance is provided by two crystallographically independent 3,3,3-tri­fluoro-2-meth­oxy-2-phenyl­propano­ate anions, i.e. (+)-PhC(CF₃)(OMe)CO₂⁻ (Wardell, Wardell et al., 2016). That it is not necessary to have chiral carboxyl­ate anions is seen in the second example of kryptoracemic behaviour whereby, as a result of incomplete substitution of chloride by 4-fluoro­benzene­sulfonate during an anion exchange experiment, the asymmetric unit comprises a pair of pseudo-enanti­omeric mefloquinium cations with equal numbers of chloride and 4-fluoro­benzene­sulfonate counter-ions (Jotani et al., 2016).

There are a number of other structurally characterized mefloquinium salts, namely three isomeric n-nitro­benzoates (Wardell et al., 2011), 3-amino-5-nitro­benzoate sesquihydrate (de Souza et al., 2011), hy­droxy(phen­yl)acetate hemihydrate (Wardell, Jotani et al., 2016) and tri­fluoro­acetate tri­fluoro­acetic acid hemihydrate (Low & Wardell, 2017), and all of these crystallize in centrosymmetric space groups with equal numbers of the mefloquinium enanti­omers. Further studies into the inter­esting phenomenon of kryptoracemic behaviour in mefloquinium salts are underway.

6. Synthesis and crystallization

A solution of mefloquinium chloride (1 mmol) and sodium di­fluoro­choro­acetate (1 mmol) in EtOH (10 ml) was refluxed for 20 min. The reaction mixture was left at room temperature and after two days, colourless slabs of (I) were collected; m.p. 473–475 K. ¹H NMR (DMSO-d₆) δ: 1.20–1.35(2H, m), 1.55–1.75(4H, m), 3.04 (1H, br,t), 3.53 (1H, br.d), 5.90 (1H, s), 6.94 (1H, br.d), 8.01 (1H, t, J = 8.0Hz), 8.13 (1H, s), 8.42 (1H, d, J = 8.02Hz), 8.72 (1H, d, J = 8.0Hz), 9.48 (1H, br,s); resonances due to OH and NH were not observed. ¹³C NMR (DMSO-d₆) δ: 21.43 (2×), 21.59, 44.51, 58.90, 67.85, 135.50. 121.17 (J_C,F = 273.8 Hz), 121.21 (J_C,F = 311.0 Hz), 123.64 (J_C,F = 271.7 Hz), 126.37, 127.93 (J_C,F = 29.2 Hz), 128.32, 128.68. 129.9 (J_C,F = 5.2Hz), 142.78, 146.73 (J_C,F = 34.5 Hz), 150.97, 159.82 (J_C,F = 25.2 Hz). ¹⁹F NMR (DMSO-d₆) δ: −58.65, −58.84, −66.68.

7. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 4. The carbon-bound H atoms were placed in calculated positions (C—H = 0.95–1.00 Å) and were included in the refinement in the riding-model approximation, with U_iso(H) set to 1.2U_eq(C). The O- and N-bound H atoms were refined with distance restraints 0.84±0.01 and 0.88±0.01 Å, respectively, and refined with U_iso(H) = 1.5U_eq(O) and 1.2U_eq(N), respectively. Owing to poor agreement, most likely due to inter­ference from the beam-stop, two reflections, i.e. (100) and (101), were omitted from the final cycles of refinement.

Table 4
Experimental details

Crystal data
Chemical formula	C17H17F6N2O·C2Cl3O2
Mr	541.69
Crystal system, space group	Triclinic, P
Temperature (K)	120
a, b, c (Å)	6.8087 (2), 11.8568 (5), 15.2562 (6)
α, β, γ (°)	67.473 (2), 81.663 (2), 89.824 (3)
V (Å^3)	1123.77 (7)
Z	2
Radiation type	Mo Kα
μ (mm^−1)	0.48
Crystal size (mm)	0.30 × 0.26 × 0.21
Data collection
Diffractometer	Bruker–Nonius Roper CCD camera on κ-goniostat
Absorption correction	Multi-scan (SADABS; Sheldrick, 2007)
Tmin, Tmax	0.636, 0.746
No. of measured, independent and observed [I > 2σ(I)] reflections	23628, 5114, 3880
Rint	0.055
(sin θ/λ)max (Å^−1)	0.648
Refinement
R[F^2 > 2σ(F^2)], wR(F^2), S	0.047, 0.133, 1.02
No. of reflections	5114
No. of parameters	307
No. of restraints	3
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å^−3)	0.81, −0.59
Computer programs: DENZO (Otwinowski & Minor, 1997), COLLECT (Hooft, 1998), SHELXS (Sheldrick, 2008), SHELXL2014/7 (Sheldrick, 2015), ORTEP-3 for Windows (Farrugia, 2012), DIAMOND (Brandenburg, 2006) and publCIF (Westrip, 2010).

Supporting information

Computing details

Data collection: COLLECT (Hooft, 1998); cell refinement: DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); data reduction: DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); program(s) used to solve structure: SHELXS (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014/7 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).

2-{[2,8-Bis(trifluoromethyl)quinolin-4-yl](hydroxy)methyl}piperidin-1-ium trichloroacetate

Crystal data

C17H17F6N2O·C2Cl3O2	Z = 2
Mr = 541.69	F(000) = 548
Triclinic, P1	Dx = 1.601 Mg m^−3
a = 6.8087 (2) Å	Mo Kα radiation, λ = 0.71073 Å
b = 11.8568 (5) Å	Cell parameters from 25711 reflections
c = 15.2562 (6) Å	θ = 2.9–27.5°
α = 67.473 (2)°	µ = 0.48 mm^−1
β = 81.663 (2)°	T = 120 K
γ = 89.824 (3)°	Slab, colourless
V = 1123.77 (7) Å^3	0.30 × 0.26 × 0.21 mm

Data collection

Bruker–Nonius Roper CCD camera on κ-goniostat diffractometer	5114 independent reflections
Radiation source: Bruker-Nonius FR591 rotating anode	3880 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.055
Detector resolution: 9.091 pixels mm^-1	θmax = 27.4°, θmin = 2.9°
φ & ω scans	h = −8→8
Absorption correction: multi-scan (SADABS; Sheldrick, 2007)	k = −15→15
Tmin = 0.636, Tmax = 0.746	l = −19→19
23628 measured reflections

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Hydrogen site location: mixed
R[F^2 > 2σ(F^2)] = 0.047	H atoms treated by a mixture of independent and constrained refinement
wR(F^2) = 0.133	w = 1/[σ^2(Fo^2) + (0.0695P)^2 + 0.5906P] where P = (Fo^2 + 2Fc^2)/3
S = 1.02	(Δ/σ)max < 0.001
5114 reflections	Δρmax = 0.81 e Å^−3
307 parameters	Δρmin = −0.59 e Å^−3
3 restraints

Special details

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.

Refinement. Owing to poor agreement, perhaps owing to interference from the beam-stop, two reflections, i.e. (1 0 0) and (1 0 1), were omitted from the final cycles of the refinement.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
F1	−0.22880 (19)	−0.00170 (13)	1.00487 (9)	0.0378 (3)
F2	−0.38289 (18)	0.05158 (14)	0.88298 (9)	0.0392 (3)
F3	−0.36487 (19)	0.17017 (13)	0.95862 (9)	0.0384 (3)
F4	0.1664 (2)	0.31406 (13)	1.01713 (9)	0.0430 (3)
F5	0.0401 (2)	0.46009 (13)	0.91079 (10)	0.0454 (4)
F6	0.3286 (3)	0.48695 (15)	0.94377 (13)	0.0590 (5)
O1	0.1401 (2)	0.03503 (14)	0.64074 (11)	0.0300 (3)
H1O	0.058 (3)	0.084 (2)	0.6145 (19)	0.045*
N1	0.0200 (3)	0.23331 (16)	0.88257 (12)	0.0255 (4)
N2	0.5142 (3)	−0.04940 (16)	0.63900 (12)	0.0246 (4)
H1N	0.420 (3)	−0.084 (2)	0.6219 (17)	0.029*
H2N	0.565 (3)	0.0117 (16)	0.5858 (11)	0.029*
C1	−0.0699 (3)	0.15108 (19)	0.86236 (14)	0.0248 (4)
C2	0.0070 (3)	0.10584 (19)	0.79255 (14)	0.0253 (4)
H2	−0.0687	0.0471	0.7811	0.030*
C3	0.1930 (3)	0.14755 (18)	0.74109 (14)	0.0232 (4)
C4	0.2993 (3)	0.23707 (18)	0.76020 (14)	0.0234 (4)
C5	0.4941 (3)	0.28638 (19)	0.71304 (15)	0.0280 (4)
H5	0.5585	0.2614	0.6645	0.034*
C6	0.5892 (3)	0.3690 (2)	0.73676 (17)	0.0330 (5)
H6	0.7195	0.4006	0.7048	0.040*
C7	0.4967 (4)	0.4085 (2)	0.80829 (17)	0.0341 (5)
H7	0.5657	0.4656	0.8244	0.041*
C8	0.3084 (3)	0.36492 (19)	0.85441 (15)	0.0294 (5)
C9	0.2044 (3)	0.27756 (18)	0.83188 (14)	0.0244 (4)
C10	−0.2631 (3)	0.0942 (2)	0.92713 (15)	0.0283 (4)
C11	0.2098 (4)	0.4061 (2)	0.93101 (17)	0.0365 (5)
C12	0.2837 (3)	0.09461 (19)	0.66926 (14)	0.0236 (4)
H12	0.3575	0.1615	0.6113	0.028*
C13	0.4279 (3)	−0.00337 (18)	0.71443 (14)	0.0233 (4)
H13	0.5380	0.0361	0.7315	0.028*
C14	0.6690 (3)	−0.1405 (2)	0.67050 (17)	0.0317 (5)
H14A	0.7833	−0.1014	0.6836	0.038*
H14B	0.7175	−0.1693	0.6187	0.038*
C15	0.5805 (3)	−0.2485 (2)	0.76066 (17)	0.0330 (5)
H15A	0.6859	−0.3051	0.7841	0.040*
H15B	0.4774	−0.2935	0.7452	0.040*
C16	0.4882 (4)	−0.2063 (2)	0.83963 (16)	0.0332 (5)
H16A	0.4233	−0.2776	0.8957	0.040*
H16B	0.5940	−0.1701	0.8607	0.040*
C17	0.3350 (3)	−0.11181 (19)	0.80364 (15)	0.0291 (5)
H17A	0.2230	−0.1503	0.7883	0.035*
H17B	0.2819	−0.0829	0.8548	0.035*
Cl1	0.91440 (9)	0.34265 (7)	0.30595 (4)	0.04821 (19)
Cl2	1.10599 (11)	0.35855 (7)	0.45615 (5)	0.0571 (2)
Cl3	0.70646 (12)	0.44205 (6)	0.43618 (6)	0.0577 (2)
O2	0.6471 (2)	0.16019 (15)	0.46652 (12)	0.0369 (4)
O3	0.8236 (2)	0.16197 (15)	0.57789 (11)	0.0352 (4)
C18	0.7750 (3)	0.20401 (19)	0.49632 (15)	0.0259 (4)
C19	0.8759 (3)	0.3309 (2)	0.42622 (16)	0.0319 (5)

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
F1	0.0324 (7)	0.0401 (8)	0.0286 (7)	0.0043 (6)	−0.0029 (5)	−0.0006 (6)
F2	0.0299 (7)	0.0574 (9)	0.0320 (7)	−0.0063 (6)	−0.0034 (5)	−0.0194 (7)
F3	0.0352 (7)	0.0435 (8)	0.0343 (7)	0.0093 (6)	0.0029 (6)	−0.0156 (6)
F4	0.0635 (9)	0.0430 (8)	0.0268 (7)	0.0074 (7)	−0.0131 (6)	−0.0160 (6)
F5	0.0657 (10)	0.0403 (8)	0.0359 (8)	0.0224 (7)	−0.0090 (7)	−0.0208 (7)
F6	0.0770 (11)	0.0524 (10)	0.0639 (11)	−0.0129 (8)	−0.0020 (9)	−0.0435 (9)
O1	0.0328 (8)	0.0348 (9)	0.0298 (8)	0.0081 (6)	−0.0138 (6)	−0.0174 (7)
N1	0.0295 (9)	0.0247 (9)	0.0230 (8)	0.0073 (7)	−0.0070 (7)	−0.0088 (7)
N2	0.0304 (9)	0.0238 (9)	0.0227 (9)	0.0022 (7)	−0.0058 (7)	−0.0118 (7)
C1	0.0274 (10)	0.0259 (10)	0.0204 (10)	0.0069 (8)	−0.0062 (8)	−0.0072 (8)
C2	0.0281 (10)	0.0247 (10)	0.0243 (10)	0.0032 (8)	−0.0076 (8)	−0.0097 (8)
C3	0.0292 (10)	0.0202 (10)	0.0200 (9)	0.0044 (8)	−0.0059 (8)	−0.0068 (8)
C4	0.0290 (10)	0.0187 (9)	0.0216 (10)	0.0052 (8)	−0.0066 (8)	−0.0060 (8)
C5	0.0324 (11)	0.0231 (10)	0.0258 (10)	0.0023 (8)	−0.0023 (8)	−0.0073 (8)
C6	0.0346 (11)	0.0231 (11)	0.0356 (12)	−0.0030 (9)	−0.0024 (9)	−0.0062 (9)
C7	0.0433 (13)	0.0210 (10)	0.0381 (13)	−0.0012 (9)	−0.0123 (10)	−0.0092 (9)
C8	0.0416 (12)	0.0208 (10)	0.0269 (11)	0.0042 (9)	−0.0084 (9)	−0.0094 (9)
C9	0.0310 (10)	0.0203 (10)	0.0220 (10)	0.0052 (8)	−0.0073 (8)	−0.0072 (8)
C10	0.0301 (11)	0.0312 (11)	0.0239 (10)	0.0066 (9)	−0.0068 (8)	−0.0103 (9)
C11	0.0532 (14)	0.0278 (11)	0.0333 (12)	0.0029 (10)	−0.0092 (11)	−0.0162 (10)
C12	0.0274 (10)	0.0253 (10)	0.0195 (9)	0.0032 (8)	−0.0056 (8)	−0.0094 (8)
C13	0.0284 (10)	0.0240 (10)	0.0206 (9)	0.0032 (8)	−0.0050 (8)	−0.0117 (8)
C14	0.0305 (11)	0.0312 (12)	0.0374 (12)	0.0072 (9)	−0.0062 (9)	−0.0174 (10)
C15	0.0360 (12)	0.0257 (11)	0.0382 (13)	0.0059 (9)	−0.0094 (10)	−0.0121 (10)
C16	0.0425 (12)	0.0259 (11)	0.0289 (11)	0.0054 (9)	−0.0102 (9)	−0.0063 (9)
C17	0.0361 (11)	0.0272 (11)	0.0225 (10)	0.0056 (9)	−0.0053 (9)	−0.0077 (9)
Cl1	0.0439 (3)	0.0694 (5)	0.0241 (3)	0.0045 (3)	−0.0020 (2)	−0.0114 (3)
Cl2	0.0573 (4)	0.0519 (4)	0.0510 (4)	−0.0245 (3)	−0.0205 (3)	−0.0033 (3)
Cl3	0.0819 (5)	0.0298 (3)	0.0581 (4)	0.0197 (3)	−0.0082 (4)	−0.0145 (3)
O2	0.0414 (9)	0.0423 (9)	0.0345 (9)	−0.0046 (7)	−0.0039 (7)	−0.0238 (8)
O3	0.0335 (8)	0.0359 (9)	0.0297 (8)	0.0021 (7)	−0.0083 (7)	−0.0045 (7)
C18	0.0260 (10)	0.0250 (10)	0.0294 (11)	0.0046 (8)	−0.0019 (8)	−0.0145 (9)
C19	0.0379 (12)	0.0302 (12)	0.0265 (11)	0.0027 (9)	−0.0079 (9)	−0.0088 (9)

Geometric parameters (Å, º)

F1—C10	1.341 (2)	C7—C8	1.367 (3)
F2—C10	1.341 (2)	C7—H7	0.9500
F3—C10	1.324 (2)	C8—C9	1.429 (3)
F4—C11	1.340 (3)	C8—C11	1.504 (3)
F5—C11	1.337 (3)	C12—C13	1.538 (3)
F6—C11	1.344 (3)	C12—H12	1.0000
O1—C12	1.417 (2)	C13—C17	1.523 (3)
O1—H1O	0.835 (10)	C13—H13	1.0000
N1—C1	1.307 (3)	C14—C15	1.519 (3)
N1—C9	1.364 (3)	C14—H14A	0.9900
N2—C13	1.500 (2)	C14—H14B	0.9900
N2—C14	1.501 (3)	C15—C16	1.529 (3)
N2—H1N	0.882 (10)	C15—H15A	0.9900
N2—H2N	0.879 (10)	C15—H15B	0.9900
C1—C2	1.404 (3)	C16—C17	1.527 (3)
C1—C10	1.510 (3)	C16—H16A	0.9900
C2—C3	1.372 (3)	C16—H16B	0.9900
C2—H2	0.9500	C17—H17A	0.9900
C3—C4	1.428 (3)	C17—H17B	0.9900
C3—C12	1.518 (3)	Cl1—C19	1.766 (2)
C4—C9	1.428 (3)	Cl2—C19	1.759 (2)
C4—C5	1.423 (3)	Cl3—C19	1.784 (2)
C5—C6	1.361 (3)	O2—C18	1.238 (3)
C5—H5	0.9500	O3—C18	1.245 (3)
C6—C7	1.413 (3)	C18—C19	1.562 (3)
C6—H6	0.9500
C12—O1—H1O	110 (2)	F6—C11—C8	111.3 (2)
C1—N1—C9	116.91 (17)	O1—C12—C3	112.85 (16)
C13—N2—C14	113.36 (16)	O1—C12—C13	105.73 (16)
C13—N2—H1N	110.4 (15)	C3—C12—C13	110.13 (16)
C14—N2—H1N	108.4 (16)	O1—C12—H12	109.3
C13—N2—H2N	110.7 (16)	C3—C12—H12	109.3
C14—N2—H2N	109.4 (16)	C13—C12—H12	109.3
H1N—N2—H2N	104 (2)	N2—C13—C17	108.72 (16)
N1—C1—C2	125.37 (19)	N2—C13—C12	107.06 (16)
N1—C1—C10	115.36 (18)	C17—C13—C12	115.11 (17)
C2—C1—C10	119.01 (18)	N2—C13—H13	108.6
C3—C2—C1	119.12 (19)	C17—C13—H13	108.6
C3—C2—H2	120.4	C12—C13—H13	108.6
C1—C2—H2	120.4	N2—C14—C15	109.75 (17)
C2—C3—C4	118.17 (18)	N2—C14—H14A	109.7
C2—C3—C12	119.94 (18)	C15—C14—H14A	109.7
C4—C3—C12	121.84 (17)	N2—C14—H14B	109.7
C9—C4—C5	118.59 (18)	C15—C14—H14B	109.7
C9—C4—C3	117.62 (18)	H14A—C14—H14B	108.2
C5—C4—C3	123.78 (18)	C14—C15—C16	111.18 (18)
C6—C5—C4	120.7 (2)	C14—C15—H15A	109.4
C6—C5—H5	119.6	C16—C15—H15A	109.4
C4—C5—H5	119.6	C14—C15—H15B	109.4
C5—C6—C7	121.0 (2)	C16—C15—H15B	109.4
C5—C6—H6	119.5	H15A—C15—H15B	108.0
C7—C6—H6	119.5	C17—C16—C15	110.84 (18)
C8—C7—C6	120.3 (2)	C17—C16—H16A	109.5
C8—C7—H7	119.9	C15—C16—H16A	109.5
C6—C7—H7	119.9	C17—C16—H16B	109.5
C7—C8—C9	120.4 (2)	C15—C16—H16B	109.5
C7—C8—C11	120.5 (2)	H16A—C16—H16B	108.1
C9—C8—C11	119.1 (2)	C13—C17—C16	110.83 (18)
N1—C9—C4	122.80 (18)	C13—C17—H17A	109.5
N1—C9—C8	118.09 (18)	C16—C17—H17A	109.5
C4—C9—C8	119.07 (19)	C13—C17—H17B	109.5
F3—C10—F1	106.88 (17)	C16—C17—H17B	109.5
F3—C10—F2	107.34 (17)	H17A—C17—H17B	108.1
F1—C10—F2	106.53 (17)	O2—C18—O3	127.3 (2)
F3—C10—C1	113.66 (18)	O2—C18—C19	116.35 (19)
F1—C10—C1	110.42 (16)	O3—C18—C19	116.19 (18)
F2—C10—C1	111.64 (17)	C18—C19—Cl2	111.80 (15)
F5—C11—F4	106.7 (2)	C18—C19—Cl1	111.57 (15)
F5—C11—F6	106.71 (19)	Cl2—C19—Cl1	108.50 (12)
F4—C11—F6	105.65 (19)	C18—C19—Cl3	105.96 (14)
F5—C11—C8	113.08 (19)	Cl2—C19—Cl3	110.39 (13)
F4—C11—C8	112.85 (19)	Cl1—C19—Cl3	108.56 (12)
C9—N1—C1—C2	−0.6 (3)	N1—C1—C10—F2	154.97 (17)
C9—N1—C1—C10	173.54 (17)	C2—C1—C10—F2	−30.5 (3)
N1—C1—C2—C3	1.3 (3)	C7—C8—C11—F5	120.8 (2)
C10—C1—C2—C3	−172.61 (18)	C9—C8—C11—F5	−60.6 (3)
C1—C2—C3—C4	−0.9 (3)	C7—C8—C11—F4	−118.0 (2)
C1—C2—C3—C12	176.57 (18)	C9—C8—C11—F4	60.7 (3)
C2—C3—C4—C9	−0.1 (3)	C7—C8—C11—F6	0.7 (3)
C12—C3—C4—C9	−177.48 (17)	C9—C8—C11—F6	179.31 (19)
C2—C3—C4—C5	179.01 (19)	C2—C3—C12—O1	19.3 (3)
C12—C3—C4—C5	1.6 (3)	C4—C3—C12—O1	−163.38 (17)
C9—C4—C5—C6	1.0 (3)	C2—C3—C12—C13	−98.6 (2)
C3—C4—C5—C6	−178.1 (2)	C4—C3—C12—C13	78.7 (2)
C4—C5—C6—C7	−0.4 (3)	C14—N2—C13—C17	−58.8 (2)
C5—C6—C7—C8	−0.6 (3)	C14—N2—C13—C12	176.26 (16)
C6—C7—C8—C9	1.0 (3)	O1—C12—C13—N2	58.90 (19)
C6—C7—C8—C11	179.6 (2)	C3—C12—C13—N2	−178.90 (15)
C1—N1—C9—C4	−0.5 (3)	O1—C12—C13—C17	−62.1 (2)
C1—N1—C9—C8	−178.23 (18)	C3—C12—C13—C17	60.1 (2)
C5—C4—C9—N1	−178.32 (18)	C13—N2—C14—C15	57.8 (2)
C3—C4—C9—N1	0.8 (3)	N2—C14—C15—C16	−54.6 (2)
C5—C4—C9—C8	−0.6 (3)	C14—C15—C16—C17	55.1 (2)
C3—C4—C9—C8	178.53 (18)	N2—C13—C17—C16	57.1 (2)
C7—C8—C9—N1	177.45 (19)	C12—C13—C17—C16	177.17 (17)
C11—C8—C9—N1	−1.2 (3)	C15—C16—C17—C13	−56.5 (2)
C7—C8—C9—C4	−0.4 (3)	O2—C18—C19—Cl2	−159.24 (16)
C11—C8—C9—C4	−179.02 (19)	O3—C18—C19—Cl2	25.0 (2)
N1—C1—C10—F3	33.4 (2)	O2—C18—C19—Cl1	−37.5 (2)
C2—C1—C10—F3	−152.12 (18)	O3—C18—C19—Cl1	146.68 (16)
N1—C1—C10—F1	−86.7 (2)	O2—C18—C19—Cl3	80.4 (2)
C2—C1—C10—F1	87.8 (2)	O3—C18—C19—Cl3	−95.35 (19)

Hydrogen-bond geometry (Å, º)

Cg1 and Cg2 are the centroids of the C4–C9 and N1/C1–C4/C9 rings, respectively.

D—H···A	D—H	H···A	D···A	D—H···A
N2—H1N···O1	0.88 (2)	2.42 (2)	2.734 (3)	102 (2)
N2—H1N···O2^i	0.88 (2)	1.99 (2)	2.769 (3)	146 (2)
O1—H1O···O3^ii	0.83 (2)	1.89 (2)	2.702 (2)	165 (2)
N2—H2N···O2	0.88 (2)	2.00 (2)	2.869 (2)	173 (2)
N2—H2N···O3	0.88 (2)	2.47 (2)	3.043 (3)	124 (1)
C19—Cl3···Cg1^iii	1.78 (1)	3.61 (1)	4.709 (3)	118 (1)
C10—F1···Cg2^iv	1.34 (1)	3.07 (1)	4.395 (2)	171 (1)
C10—F2···Cg1^ii	1.34 (1)	3.44 (1)	3.788 (2)	95 (1)
C10—F3···Cg1^ii	1.32 (1)	3.24 (1)	3.788 (2)	104 (1)

Symmetry codes: (i) −x+1, −y, −z+1; (ii) x−1, y, z; (iii) −x+1, −y+1, −z+1; (iv) −x, −y, −z+2.

 

Footnotes

‡Additional correspondence author, e-mail: [e-mail].