organic compounds
4-Ethoxyanilinium hexafluorophosphate monohydrate
aOrdered Matter Science Research Center, Southeast UniVersity, Nanjing 210096, People's Republic of China
*Correspondence e-mail: fuxuequn222@163.com
In the crystal of the title compound, C8H12NO+·PF6−·H2O, intermolecular N—H⋯F, N—H⋯O and O—H⋯F hydrogen bonds link the molecules into chains along the c axis and C—H⋯π contacts further stabilize the structure. The F atoms of one of the hexafluorophosphate anions are disordered over two sets of sites with site-occupancy factors of 0.27 (3) and 0.73 (3).
Related literature
For related structures, see: Fu (2009a,b). The title compound was studied as part of our search for ferroelectric compounds, which usually have a phase transition.For background to materials, see: Li et al. (2008); Zhang et al. (2009).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku, 2005); cell CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: PRPKAPPA (Ferguson, 1999).
Supporting information
https://doi.org/10.1107/S1600536810018404/zq2040sup1.cif
contains datablocks I, New_Global_Publ_Block. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810018404/zq2040Isup2.hkl
1.37 g (10 mmol) of 4-Ethoxybenzenamine was firstly dissolved in 50 ml ethanol, to which hexafluorophosphoric acid (70%, w/w) was then added until the solution becomes acidic under stirring. Single crystals of the title compond were prepared by slow evaporation at room temperature of the acidic solution after 3 days.
The water H atoms were found in Fourier difference maps and were refined freely. Positional parameters of all other H atoms were calculated geometrically and allowed to ride on the C and N atoms to which they are bonded, with Uiso(H) = 1.2Ueq(C,N). The F atoms of the hexafluorophosphate anion are disordered in two orientations with site-occupancy factors of 0.73 (3) and 0.27 (3).
As a continuation of our study of dielectric-ferroelectric materials, including organic ligands (Li et al., 2008), metal-organic coordination compounds (Zhang et al., 2009), and organic-inorganic hybrids, we studied the dielectric properties of the title compound. Unfortunately, there was no distinct anomaly observed from 93 to 350 K. In this article, the
of this compound is presented. The crystal structures of 4-ethoxyanilinium together with other anions are known (Fu, 2009a,b).The π interactions further stabilize the crystal structure.
of the consists of one almost coplanar protonated 4-ethoxyanilinium cation with the C2—C1—O1—C7 and C1—O1—C7—C8 torsion angles of 172.9 (3) and 177.4 (3)°, respectively, one hexafluorophosphate anion for which the F atoms are disordered over two sets of positions with site-occupancy factors of 0.27 (3) and 0.73 (3), and one water molecule (Fig.1). In the several intermolecular N—H···F and O—H···F hydrogen bonds link all species to chains along the c axis (Fig.2). In addition, C—H···For related structures, see: Fu (2009a,b). For background to
materials, see: Li et al. (2008); Zhang et al. (2009).Data collection: CrystalClear (Rigaku, 2005); cell
CrystalClear (Rigaku, 2005); data reduction: CrystalClear (Rigaku, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: PRPKAPPA (Ferguson, 1999).Fig. 1. The molecular structure of the title compound with the atomic numbering scheme. Displacement ellipsoids are drawn at the 30% probability level, and all H atoms have been omitted for clarity. | |
Fig. 2. A view of the packing of the title compound, stacking along the c axis. Dashed lines indicate hydrogen bonds. |
C8H12NO+·PF6−·H2O | F(000) = 616 |
Mr = 301.17 | Dx = 1.623 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4774 reflections |
a = 17.498 (4) Å | θ = 3.1–27.7° |
b = 5.1236 (10) Å | µ = 0.29 mm−1 |
c = 14.793 (3) Å | T = 298 K |
β = 111.68 (3)° | Prism, colourless |
V = 1232.4 (4) Å3 | 0.4 × 0.3 × 0.2 mm |
Z = 4 |
Rigaku SCXmini diffractometer | 2820 independent reflections |
Radiation source: fine-focus sealed tube | 1890 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.054 |
Detector resolution: 13.6612 pixels mm-1 | θmax = 27.5°, θmin = 3.1° |
ω scans | h = −22→22 |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | k = −6→6 |
Tmin = 0.900, Tmax = 0.943 | l = −19→19 |
12124 measured reflections |
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)] = 0.059 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.164 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0764P)2 + 0.6523P] where P = (Fo2 + 2Fc2)/3 |
2820 reflections | (Δ/σ)max = 0.003 |
226 parameters | Δρmax = 0.45 e Å−3 |
235 restraints | Δρmin = −0.48 e Å−3 |
C8H12NO+·PF6−·H2O | V = 1232.4 (4) Å3 |
Mr = 301.17 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 17.498 (4) Å | µ = 0.29 mm−1 |
b = 5.1236 (10) Å | T = 298 K |
c = 14.793 (3) Å | 0.4 × 0.3 × 0.2 mm |
β = 111.68 (3)° |
Rigaku SCXmini diffractometer | 2820 independent reflections |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | 1890 reflections with I > 2σ(I) |
Tmin = 0.900, Tmax = 0.943 | Rint = 0.054 |
12124 measured reflections |
R[F2 > 2σ(F2)] = 0.059 | 235 restraints |
wR(F2) = 0.164 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | Δρmax = 0.45 e Å−3 |
2820 reflections | Δρmin = −0.48 e Å−3 |
226 parameters |
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. 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) | |
N1 | 0.15275 (14) | 0.3564 (5) | 0.42609 (17) | 0.0414 (6) | |
H1A | 0.1427 | 0.4860 | 0.3832 | 0.050* | |
H1B | 0.1304 | 0.3936 | 0.4697 | 0.050* | |
H1C | 0.1311 | 0.2092 | 0.3953 | 0.050* | |
O1 | 0.49349 (12) | 0.2376 (5) | 0.60339 (18) | 0.0624 (7) | |
C1 | 0.40946 (18) | 0.2556 (6) | 0.5644 (2) | 0.0458 (7) | |
C4 | 0.24232 (16) | 0.3242 (5) | 0.47587 (19) | 0.0366 (6) | |
C3 | 0.29478 (19) | 0.4801 (6) | 0.4497 (2) | 0.0515 (8) | |
H3A | 0.2739 | 0.6074 | 0.4021 | 0.062* | |
C5 | 0.27196 (18) | 0.1368 (7) | 0.5450 (2) | 0.0497 (8) | |
H5A | 0.2360 | 0.0333 | 0.5625 | 0.060* | |
C6 | 0.35635 (19) | 0.1007 (7) | 0.5895 (2) | 0.0558 (9) | |
H6A | 0.3769 | −0.0286 | 0.6364 | 0.067* | |
C2 | 0.37808 (19) | 0.4465 (7) | 0.4943 (3) | 0.0561 (9) | |
H2A | 0.4137 | 0.5527 | 0.4773 | 0.067* | |
C8 | 0.6217 (2) | 0.0478 (10) | 0.6954 (3) | 0.0783 (12) | |
H8A | 0.6483 | −0.0935 | 0.7380 | 0.117* | |
H8B | 0.6405 | 0.2108 | 0.7279 | 0.117* | |
H8C | 0.6347 | 0.0396 | 0.6378 | 0.117* | |
C7 | 0.5304 (2) | 0.0266 (8) | 0.6678 (3) | 0.0632 (10) | |
H7A | 0.5107 | −0.1390 | 0.6359 | 0.076* | |
H7B | 0.5164 | 0.0372 | 0.7254 | 0.076* | |
O1W | 0.08195 (12) | 0.8613 (5) | 0.44539 (16) | 0.0473 (5) | |
H1WB | 0.0467 (16) | 0.843 (9) | 0.3908 (11) | 0.086 (15)* | |
H1WA | 0.071 (2) | 0.856 (9) | 0.4948 (14) | 0.086 (15)* | |
P1 | 0.11668 (4) | 0.96937 (15) | 0.18642 (5) | 0.0396 (3) | |
F3 | 0.0519 (7) | 1.103 (3) | 0.2240 (8) | 0.064 (2) | 0.73 (3) |
F5 | 0.1765 (9) | 0.833 (3) | 0.1430 (10) | 0.065 (2) | 0.73 (3) |
F4 | 0.0451 (7) | 0.782 (2) | 0.1246 (9) | 0.072 (2) | 0.73 (3) |
F1 | 0.0911 (6) | 1.1714 (17) | 0.0948 (6) | 0.0618 (15) | 0.73 (3) |
F2 | 0.1410 (8) | 0.783 (2) | 0.2777 (7) | 0.086 (2) | 0.73 (3) |
F6 | 0.1869 (6) | 1.169 (2) | 0.2477 (7) | 0.0704 (18) | 0.73 (3) |
F6' | 0.1908 (13) | 1.081 (6) | 0.2715 (16) | 0.066 (4) | 0.27 (3) |
F4' | 0.0396 (15) | 0.830 (6) | 0.1040 (17) | 0.053 (4) | 0.27 (3) |
F2' | 0.1153 (17) | 0.730 (5) | 0.256 (2) | 0.070 (4) | 0.27 (3) |
F3' | 0.0594 (18) | 1.160 (7) | 0.2229 (19) | 0.056 (4) | 0.27 (3) |
F5' | 0.184 (3) | 0.796 (8) | 0.164 (3) | 0.062 (4) | 0.27 (3) |
F1' | 0.1166 (18) | 1.168 (5) | 0.1154 (19) | 0.075 (4) | 0.27 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0383 (13) | 0.0429 (13) | 0.0428 (13) | −0.0011 (11) | 0.0147 (11) | −0.0042 (11) |
O1 | 0.0333 (11) | 0.0710 (15) | 0.0758 (16) | 0.0024 (11) | 0.0119 (11) | 0.0209 (13) |
C1 | 0.0335 (14) | 0.0500 (17) | 0.0516 (17) | 0.0022 (13) | 0.0128 (13) | 0.0029 (14) |
C4 | 0.0337 (14) | 0.0378 (15) | 0.0383 (14) | −0.0002 (12) | 0.0132 (12) | −0.0041 (12) |
C3 | 0.0425 (16) | 0.0509 (18) | 0.0603 (19) | 0.0031 (14) | 0.0181 (15) | 0.0191 (16) |
C5 | 0.0406 (17) | 0.0564 (19) | 0.0508 (17) | −0.0050 (15) | 0.0153 (14) | 0.0124 (15) |
C6 | 0.0443 (18) | 0.060 (2) | 0.0577 (19) | 0.0035 (16) | 0.0128 (15) | 0.0216 (17) |
C2 | 0.0425 (17) | 0.0553 (19) | 0.073 (2) | −0.0024 (15) | 0.0237 (16) | 0.0172 (17) |
C8 | 0.045 (2) | 0.108 (3) | 0.071 (3) | 0.018 (2) | 0.0099 (19) | 0.020 (2) |
C7 | 0.0450 (18) | 0.073 (2) | 0.064 (2) | 0.0094 (18) | 0.0113 (16) | 0.0147 (19) |
O1W | 0.0395 (12) | 0.0532 (13) | 0.0448 (13) | −0.0011 (10) | 0.0105 (11) | 0.0014 (11) |
P1 | 0.0366 (4) | 0.0479 (5) | 0.0323 (4) | 0.0065 (3) | 0.0103 (3) | −0.0011 (3) |
F3 | 0.055 (3) | 0.082 (6) | 0.065 (3) | 0.018 (3) | 0.034 (2) | −0.005 (3) |
F5 | 0.055 (3) | 0.086 (4) | 0.054 (5) | 0.022 (2) | 0.019 (4) | −0.012 (3) |
F4 | 0.068 (3) | 0.074 (4) | 0.071 (5) | −0.032 (3) | 0.022 (3) | −0.011 (3) |
F1 | 0.054 (4) | 0.073 (2) | 0.054 (3) | 0.014 (3) | 0.014 (2) | 0.026 (2) |
F2 | 0.092 (6) | 0.101 (5) | 0.054 (3) | 0.027 (4) | 0.015 (3) | 0.036 (3) |
F6 | 0.057 (2) | 0.078 (4) | 0.066 (4) | −0.013 (3) | 0.011 (2) | −0.025 (3) |
F6' | 0.042 (4) | 0.089 (9) | 0.054 (7) | 0.011 (6) | 0.004 (5) | −0.032 (6) |
F4' | 0.044 (5) | 0.075 (8) | 0.040 (6) | −0.004 (5) | 0.015 (4) | −0.013 (6) |
F2' | 0.074 (10) | 0.075 (7) | 0.060 (8) | 0.017 (6) | 0.025 (6) | 0.029 (6) |
F3' | 0.048 (6) | 0.066 (9) | 0.042 (6) | 0.022 (6) | 0.003 (5) | −0.007 (5) |
F5' | 0.050 (6) | 0.087 (10) | 0.049 (10) | 0.018 (6) | 0.018 (7) | −0.017 (7) |
F1' | 0.065 (10) | 0.081 (6) | 0.066 (7) | −0.007 (7) | 0.010 (6) | 0.035 (6) |
N1—C4 | 1.474 (4) | C8—H8B | 0.9600 |
N1—H1A | 0.8900 | C8—H8C | 0.9600 |
N1—H1B | 0.8900 | C7—H7A | 0.9700 |
N1—H1C | 0.8900 | C7—H7B | 0.9700 |
O1—C1 | 1.370 (4) | O1W—H1WB | 0.821 (10) |
O1—C7 | 1.428 (4) | O1W—H1WA | 0.82 (3) |
C1—C6 | 1.373 (4) | P1—F1' | 1.46 (2) |
C1—C2 | 1.384 (4) | P1—F6' | 1.546 (18) |
C4—C5 | 1.358 (4) | P1—F4 | 1.575 (10) |
C4—C3 | 1.376 (4) | P1—F5 | 1.578 (13) |
C3—C2 | 1.371 (4) | P1—F2 | 1.580 (8) |
C3—H3A | 0.9300 | P1—F3 | 1.590 (11) |
C5—C6 | 1.389 (4) | P1—F6 | 1.598 (7) |
C5—H5A | 0.9300 | P1—F5' | 1.60 (4) |
C6—H6A | 0.9300 | P1—F2' | 1.61 (2) |
C2—H2A | 0.9300 | P1—F4' | 1.61 (3) |
C8—C7 | 1.500 (5) | P1—F3' | 1.63 (3) |
C8—H8A | 0.9600 | P1—F1 | 1.632 (7) |
C4—N1—H1A | 109.5 | F6'—P1—F3 | 92.8 (9) |
C4—N1—H1B | 109.4 | F4—P1—F3 | 87.1 (6) |
H1A—N1—H1B | 109.5 | F5—P1—F3 | 176.5 (7) |
C4—N1—H1C | 109.5 | F2—P1—F3 | 87.9 (6) |
H1A—N1—H1C | 109.5 | F1'—P1—F6 | 76.1 (9) |
H1B—N1—H1C | 109.5 | F4—P1—F6 | 177.8 (5) |
C1—O1—C7 | 118.8 (3) | F5—P1—F6 | 91.6 (8) |
O1—C1—C6 | 125.2 (3) | F2—P1—F6 | 89.7 (3) |
O1—C1—C2 | 115.5 (3) | F3—P1—F6 | 91.4 (6) |
C6—C1—C2 | 119.4 (3) | F1'—P1—F5' | 92.5 (15) |
C5—C4—C3 | 120.9 (3) | F6'—P1—F5' | 85.2 (18) |
C5—C4—N1 | 119.7 (3) | F4—P1—F5' | 91.5 (18) |
C3—C4—N1 | 119.4 (3) | F2—P1—F5' | 81.6 (13) |
C2—C3—C4 | 119.5 (3) | F3—P1—F5' | 169.4 (13) |
C2—C3—H3A | 120.2 | F6—P1—F5' | 90.3 (18) |
C4—C3—H3A | 120.2 | F1'—P1—F2' | 174.5 (15) |
C4—C5—C6 | 119.6 (3) | F6'—P1—F2' | 88.1 (9) |
C4—C5—H5A | 120.2 | F4—P1—F2' | 73.3 (9) |
C6—C5—H5A | 120.2 | F5—P1—F2' | 95.5 (12) |
C1—C6—C5 | 120.1 (3) | F3—P1—F2' | 85.4 (12) |
C1—C6—H6A | 119.9 | F6—P1—F2' | 108.2 (8) |
C5—C6—H6A | 119.9 | F5'—P1—F2' | 84.1 (17) |
C3—C2—C1 | 120.4 (3) | F1'—P1—F4' | 89.3 (11) |
C3—C2—H2A | 119.8 | F6'—P1—F4' | 174.7 (12) |
C1—C2—H2A | 119.8 | F5—P1—F4' | 89.5 (10) |
C7—C8—H8A | 109.5 | F2—P1—F4' | 105.3 (9) |
C7—C8—H8B | 109.5 | F3—P1—F4' | 87.1 (10) |
H8A—C8—H8B | 109.5 | F6—P1—F4' | 164.9 (9) |
C7—C8—H8C | 109.5 | F5'—P1—F4' | 94.0 (19) |
H8A—C8—H8C | 109.5 | F2'—P1—F4' | 86.7 (10) |
H8B—C8—H8C | 109.5 | F1'—P1—F3' | 89.0 (15) |
O1—C7—C8 | 107.4 (3) | F6'—P1—F3' | 86.7 (13) |
O1—C7—H7A | 110.2 | F4—P1—F3' | 96.0 (12) |
C8—C7—H7A | 110.2 | F5—P1—F3' | 169.1 (14) |
O1—C7—H7B | 110.2 | F2—P1—F3' | 94.9 (12) |
C8—C7—H7B | 110.2 | F6—P1—F3' | 82.3 (12) |
H7A—C7—H7B | 108.5 | F5'—P1—F3' | 171.8 (19) |
H1WB—O1W—H1WA | 122 (2) | F2'—P1—F3' | 94.9 (17) |
F1'—P1—F6' | 96.0 (11) | F4'—P1—F3' | 94.1 (14) |
F1'—P1—F4 | 102.6 (9) | F6'—P1—F1 | 109.3 (11) |
F6'—P1—F4 | 161.3 (10) | F4—P1—F1 | 89.4 (4) |
F1'—P1—F5 | 80.8 (12) | F5—P1—F1 | 87.8 (5) |
F6'—P1—F5 | 90.7 (10) | F2—P1—F1 | 177.8 (5) |
F4—P1—F5 | 89.9 (8) | F3—P1—F1 | 90.3 (5) |
F1'—P1—F2 | 164.6 (8) | F6—P1—F1 | 89.0 (3) |
F6'—P1—F2 | 69.4 (10) | F5'—P1—F1 | 100.2 (13) |
F4—P1—F2 | 91.9 (4) | F2'—P1—F1 | 162.3 (8) |
F5—P1—F2 | 94.0 (6) | F4'—P1—F1 | 75.9 (10) |
F1'—P1—F3 | 98.1 (12) | F3'—P1—F1 | 83.1 (11) |
C7—O1—C1—C6 | 6.9 (5) | C2—C1—C6—C5 | −0.3 (5) |
C7—O1—C1—C2 | −172.9 (3) | C4—C5—C6—C1 | 0.7 (5) |
C5—C4—C3—C2 | −0.2 (5) | C4—C3—C2—C1 | 0.7 (5) |
N1—C4—C3—C2 | −178.5 (3) | O1—C1—C2—C3 | 179.3 (3) |
C3—C4—C5—C6 | −0.5 (5) | C6—C1—C2—C3 | −0.4 (5) |
N1—C4—C5—C6 | 177.8 (3) | C1—O1—C7—C8 | 177.4 (3) |
O1—C1—C6—C5 | 180.0 (3) |
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···F2′ | 0.89 | 2.16 | 3.03 (2) | 167 |
N1—H1A···F2 | 0.89 | 2.17 | 3.049 (10) | 169 |
N1—H1B···F1i | 0.89 | 2.22 | 3.066 (8) | 158 |
N1—H1B···F1′i | 0.89 | 2.28 | 3.09 (3) | 152 |
N1—H1C···O1Wii | 0.89 | 2.22 | 2.883 (3) | 131 |
N1—H1C···F3ii | 0.89 | 2.46 | 3.137 (12) | 133 |
N1—H1C···F3′ii | 0.89 | 2.40 | 3.01 (3) | 126 |
N1—H1C···F6′ii | 0.89 | 2.51 | 2.96 (2) | 112 |
O1W—H1WB···F3′iii | 0.82 (1) | 2.20 (3) | 2.97 (3) | 156 (4) |
O1W—H1WB···F3iii | 0.82 (1) | 2.28 (3) | 3.030 (12) | 152 (4) |
O1W—H1WA···F4i | 0.82 (3) | 2.24 (2) | 3.040 (12) | 164 (4) |
O1W—H1WA···F4′i | 0.82 (3) | 2.11 (3) | 2.88 (2) | 155 (4) |
O1W—H1WA···F5i | 0.82 (3) | 2.48 (4) | 2.951 (16) | 117 (3) |
C8—H8C···Cg1iv | 0.96 | 3.16 | 4.023 (5) | 150 |
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) x, y−1, z; (iii) −x, y−1/2, −z+1/2; (iv) −x+1, −y, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C8H12NO+·PF6−·H2O |
Mr | 301.17 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 298 |
a, b, c (Å) | 17.498 (4), 5.1236 (10), 14.793 (3) |
β (°) | 111.68 (3) |
V (Å3) | 1232.4 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.29 |
Crystal size (mm) | 0.4 × 0.3 × 0.2 |
Data collection | |
Diffractometer | Rigaku SCXmini diffractometer |
Absorption correction | Multi-scan (CrystalClear; Rigaku, 2005) |
Tmin, Tmax | 0.900, 0.943 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12124, 2820, 1890 |
Rint | 0.054 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.059, 0.164, 1.05 |
No. of reflections | 2820 |
No. of parameters | 226 |
No. of restraints | 235 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.45, −0.48 |
Computer programs: CrystalClear (Rigaku, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008), PRPKAPPA (Ferguson, 1999).
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···F2' | 0.89 | 2.16 | 3.03 (2) | 167.2 |
N1—H1A···F2 | 0.89 | 2.17 | 3.049 (10) | 169.0 |
N1—H1B···F1i | 0.89 | 2.22 | 3.066 (8) | 157.6 |
N1—H1B···F1'i | 0.89 | 2.28 | 3.09 (3) | 152.3 |
N1—H1C···O1Wii | 0.89 | 2.22 | 2.883 (3) | 130.8 |
N1—H1C···F3ii | 0.89 | 2.46 | 3.137 (12) | 133.3 |
N1—H1C···F3'ii | 0.89 | 2.40 | 3.01 (3) | 126.0 |
N1—H1C···F6'ii | 0.89 | 2.51 | 2.96 (2) | 112.4 |
O1W—H1WB···F3'iii | 0.821 (10) | 2.20 (3) | 2.97 (3) | 156 (4) |
O1W—H1WB···F3iii | 0.821 (10) | 2.28 (3) | 3.030 (12) | 152 (4) |
O1W—H1WA···F4i | 0.82 (3) | 2.241 (19) | 3.040 (12) | 164 (4) |
O1W—H1WA···F4'i | 0.82 (3) | 2.11 (3) | 2.88 (2) | 155 (4) |
O1W—H1WA···F5i | 0.82 (3) | 2.48 (4) | 2.951 (16) | 117 (3) |
C8—H8C···Cg1iv | 0.96 | 3.16 | 4.023 (5) | 150.06 |
Symmetry codes: (i) x, −y+3/2, z+1/2; (ii) x, y−1, z; (iii) −x, y−1/2, −z+1/2; (iv) −x+1, −y, −z+1. |
Acknowledgements
The author is grateful to the starter fund of Southeast University for financial support to buy the X-ray diffractometer.
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.
As a continuation of our study of dielectric-ferroelectric materials, including organic ligands (Li et al., 2008), metal-organic coordination compounds (Zhang et al., 2009), and organic-inorganic hybrids, we studied the dielectric properties of the title compound. Unfortunately, there was no distinct anomaly observed from 93 to 350 K. In this article, the crystal structure of this compound is presented. The crystal structures of 4-ethoxyanilinium together with other anions are known (Fu, 2009a,b).
The asymmetric unit of the crystal structure consists of one almost coplanar protonated 4-ethoxyanilinium cation with the C2—C1—O1—C7 and C1—O1—C7—C8 torsion angles of 172.9 (3) and 177.4 (3)°, respectively, one hexafluorophosphate anion for which the F atoms are disordered over two sets of positions with site-occupancy factors of 0.27 (3) and 0.73 (3), and one water molecule (Fig.1). In the crystal structure, several intermolecular N—H···F and O—H···F hydrogen bonds link all species to chains along the c axis (Fig.2). In addition, C—H···π interactions further stabilize the crystal structure.