metal-organic compounds
Bis(propane-1,3-diaminium) hexafluoridoferrate(III) fluoride trihydrate
aUnité de Recherche 99/UR12-30, Faculté des Sciences de Bizerte, 7021 Jarzouna, Tunisia, and bLaboratoire des Oxydes et Fluorures - UMR 6010 CNRS, Institut de Recherche en Ingénierie Moléculaire et Matériaux, Fonctionnels, IRIM2F FR CNRS 2775, Faculté des Sciences et Techniques, Université du Maine, Avenue Olivier Messiaen, 72085 LE MANS Cedex 9, France
*Correspondence e-mail: amor.benali@fsb.rnu.tn
The 3H12N2)2[FeF6]F·3H2O, contains two propane-1,3-diaminium [(H2dap)2+] cations, an octahedral [FeF6]3− anion, an isolated F− anion and three water molecules of solvation. Each [FeF6]3− anion is surrounded by four separate hydrogen-bonded water molecules in the equatorial sites and by five separate aminium cation donor groups. The axial F atoms are only involved in N—H⋯F hydrogen bonds, resulting in a three-dimensional structure.
of the title iron hybrid fluoride, (CRelated literature
For general background to hybrid fluorides, their synthesis and their applications, see: Ben Ali et al. (2007, 2009); Adil et al. (2007); Latroche et al. (2006); Rother et al. (1998), Bentrup et al. (1998). For F⋯N interactions, see: Steiner (1998). For bond-valence sum (BVS) calculations, see: Brese & O'Keeffe (1991).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: STADI4 (Stoe & Cie, 1998); cell STADI4; data reduction: X-RED (Stoe & Cie, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999); molecular graphics: DIAMOND (Brandenburg & Putz, 2004) and ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: enCIFer (Allen et al., 2004).
Supporting information
https://doi.org/10.1107/S1600536810018039/zs2036sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810018039/zs2036Isup2.hkl
The title compound was prepared from a starting mixture of FeF3 (0.5 g) in 40% HF (3.0 ml) and ethanol (5 ml). 1,3-diaminopropane (2.7 ml) was added and mild hydrothermal conditions (463 K) were applied in a Teflon lined autoclave (25 ml). The resulting product was washed with ethanol and dried in air giving colourless single crystals.
All non-hydrogen atoms were refined with anisotropic displacement parameters. The H atoms of the water molecules were located using difference methods and their positional and isotropic displacement parameters were refined. Other H atoms including those on the aminium groups were included in the
at calculated positions and refined with a common isotropic thermal parameter.The structure of the title compound (H2dap)2[FeF6](F).3H2O (I) consists of isolated FeF6 octahedra, diprotonated 1,3-diaminopropane (H2dap)2+ cations and three water molecules of solvation connected by a three-dimensional framework of hydrogen bonds in which isolated fluoride anions are located (Figure 1 and Figure 2). In (I) the [FeF6] complex anion adopts a slightly distorted octahedral environment, the Fe—F bond distance range [1.897 (2)–1.947 (2) Å] being typical of an octahedral ironIII environment. Each octahedral FeF63- anion is surrounded by four separate hydrogen-bonded water molecules in the equatorial sites and by seven separate aminium cation donor groups (Figure 3). The axial F atoms (F2, F4) are involved only in N–H···F interactions (Table 1). One of the equatorial F atom (F3), which has the longest Fe–F bond distance [1.947 (2)] Å), establishes three hydrogen bonds and consequently presents a low valence (0.47) with FeIII.
In fluoride metallates, "free" fluoride ions, are always surrounded by amine groups and their
varies from 3 to 6. Also F···N distances increase with the (Steiner, 1998). In the title compound, "free" F ions adopt a tetrahedral coordination with four hydrogen atoms from four H2dap cations (Figure 4). The three hydrogen-bonded water molecules form trimer clusters, presenting various triangular environments with F acceptor atoms of the FeF6 octahedra and H donor atoms of the cation aminium groups (Figure 5). The infrared of the title compound gives information on the organic moiety (C—C, C—N) and on the of the iron atom, the presence of a vibrational band in the neighbourhood of 487 cm-1 being consistent with iron(III).For general background to hybrid fluorides, their synthesis and their applications, see: Ben Ali et al. (2007, 2009); Adil et al. (2007); Latroche et al. (2006); Rother et al. (1998), Bentrup et al. (1998). For F···N interactions, see: Steiner (1998). For bond-valence sum (BVS) calculations, see: Brese & O'Keeffe (1991).
Data collection: STADI4 (Stoe & Cie, 1998); cell
STADI4 (Stoe & Cie, 1998); data reduction: X-RED (Stoe & Cie, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999); molecular graphics: DIAMOND (Brandenburg & Putz, 2004) and ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: enCIFer (Allen et al., 2004).Fig. 1. An view the (H2dap)2+ cation, the [FeF6]3- and F- anions and the water molecules of solvation (I). Thermal displacement ellipsoids are shown at the 50% probability level. | |
Fig. 2. The three-dimensional H bonding network in the structure of (I). | |
Fig. 3. The environment of the FeF6 octahedron. | |
Fig. 4. The environment of the isolated fluoride anion. | |
Fig. 5. The environment of the water molecules |
(C3H12N2)2[FeF6]F·3H2O | Z = 2 |
Mr = 395.18 | F(000) = 414 |
Triclinic, P1 | Dx = 1.564 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.844 (1) Å | Cell parameters from 24 reflections |
b = 9.847 (1) Å | θ = 5–20° |
c = 10.7740 (8) Å | µ = 0.98 mm−1 |
α = 106.959 (7)° | T = 295 K |
β = 95.379 (6)° | Parallelepiped, colorless |
γ = 118.914 (9)° | 0.32 × 0.07 × 0.07 mm |
V = 839.35 (17) Å3 |
SIEMENS AED2 diffractometer | Rint = 0.000 |
Radiation source: fine-focus sealed tube | θmax = 25.0°, θmin = 2.1° |
Graphite monochromator | h = −11→11 |
2θ/ω scans | k = −10→11 |
2920 measured reflections | l = −12→0 |
2920 independent reflections | 3 standard reflections every 120 min |
2599 reflections with I > 2σ(I) | intensity decay: 4% |
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)] = 0.031 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.093 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.14 | w = 1/[σ2(Fo2) + (0.0485P)2 + 0.4679P] where P = (Fo2 + 2Fc2)/3 |
2920 reflections | (Δ/σ)max < 0.001 |
219 parameters | Δρmax = 0.42 e Å−3 |
0 restraints | Δρmin = −0.35 e Å−3 |
(C3H12N2)2[FeF6]F·3H2O | γ = 118.914 (9)° |
Mr = 395.18 | V = 839.35 (17) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.844 (1) Å | Mo Kα radiation |
b = 9.847 (1) Å | µ = 0.98 mm−1 |
c = 10.7740 (8) Å | T = 295 K |
α = 106.959 (7)° | 0.32 × 0.07 × 0.07 mm |
β = 95.379 (6)° |
SIEMENS AED2 diffractometer | Rint = 0.000 |
2920 measured reflections | 3 standard reflections every 120 min |
2920 independent reflections | intensity decay: 4% |
2599 reflections with I > 2σ(I) |
R[F2 > 2σ(F2)] = 0.031 | 0 restraints |
wR(F2) = 0.093 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.14 | Δρmax = 0.42 e Å−3 |
2920 reflections | Δρmin = −0.35 e Å−3 |
219 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 | ||
Fe | 0.84562 (4) | 0.12759 (4) | 0.22030 (3) | 0.02722 (13) | |
F1 | 0.7789 (3) | −0.0409 (2) | 0.04636 (19) | 0.0734 (6) | |
F2 | 0.9740 (2) | 0.29714 (19) | 0.15238 (16) | 0.0467 (4) | |
F3 | 0.66528 (18) | 0.1495 (2) | 0.16599 (17) | 0.0479 (4) | |
F4 | 0.7093 (2) | −0.0330 (2) | 0.28815 (18) | 0.0582 (5) | |
F5 | 0.91998 (19) | 0.30634 (19) | 0.39249 (15) | 0.0460 (4) | |
F6 | 1.0227 (2) | 0.1036 (2) | 0.2722 (2) | 0.0582 (5) | |
F7 | 0.79472 (17) | 0.17081 (17) | 0.74186 (14) | 0.0363 (3) | |
C1 | 0.6954 (3) | 0.3991 (3) | 0.6071 (2) | 0.0330 (5) | |
H1D | 0.7029 | 0.4645 | 0.5530 | 0.0476 (17)* | |
H1E | 0.6899 | 0.4560 | 0.6948 | 0.0476 (17)* | |
C2 | 0.5420 (3) | 0.2254 (3) | 0.5389 (3) | 0.0327 (5) | |
H2D | 0.5468 | 0.1674 | 0.4512 | 0.0476 (17)* | |
H2E | 0.5322 | 0.1600 | 0.5935 | 0.0476 (17)* | |
C3 | 0.3974 (3) | 0.2417 (3) | 0.5219 (3) | 0.0371 (6) | |
H3D | 0.4063 | 0.3203 | 0.6061 | 0.0476 (17)* | |
H3E | 0.3969 | 0.2869 | 0.4531 | 0.0476 (17)* | |
C4 | 0.6160 (3) | 0.3197 (3) | 0.9521 (3) | 0.0371 (6) | |
H4D | 0.5557 | 0.3222 | 1.0181 | 0.0476 (17)* | |
H4E | 0.5624 | 0.3215 | 0.8729 | 0.0476 (17)* | |
C5 | 0.7874 (3) | 0.4733 (3) | 1.0111 (3) | 0.0336 (5) | |
H5D | 0.8430 | 0.4677 | 1.0868 | 0.0476 (17)* | |
H5E | 0.8456 | 0.4743 | 0.9431 | 0.0476 (17)* | |
C6 | 0.7863 (3) | 0.6330 (3) | 1.0579 (3) | 0.0368 (6) | |
H6D | 0.7111 | 0.6271 | 0.9884 | 0.0476 (17)* | |
H6E | 0.7498 | 0.6438 | 1.1388 | 0.0476 (17)* | |
N1 | 0.8414 (2) | 0.3911 (2) | 0.6246 (2) | 0.0318 (4) | |
H1A | 0.8289 | 0.3195 | 0.6639 | 0.0476 (17)* | |
H1B | 0.9268 | 0.4928 | 0.6762 | 0.0476 (17)* | |
H1C | 0.8567 | 0.3562 | 0.5442 | 0.0476 (17)* | |
N2 | 0.2431 (2) | 0.0780 (3) | 0.4826 (2) | 0.0368 (5) | |
H2A | 0.2398 | 0.0399 | 0.5484 | 0.0476 (17)* | |
H2B | 0.2363 | 0.0043 | 0.4069 | 0.0476 (17)* | |
H2C | 0.1607 | 0.0915 | 0.4689 | 0.0476 (17)* | |
N3 | 0.6179 (3) | 0.1637 (3) | 0.9144 (2) | 0.0393 (5) | |
H3A | 0.5179 | 0.0751 | 0.8720 | 0.0476 (17)* | |
H3B | 0.6561 | 0.1562 | 0.9887 | 0.0476 (17)* | |
H3C | 0.6809 | 0.1661 | 0.8599 | 0.0476 (17)* | |
N4 | 0.9502 (3) | 0.7830 (2) | 1.0873 (2) | 0.0347 (5) | |
H4A | 1.0194 | 0.7879 | 1.1504 | 0.0476 (17)* | |
H4B | 0.9471 | 0.8756 | 1.1168 | 0.0476 (17)* | |
H4C | 0.9820 | 0.7753 | 1.0123 | 0.0476 (17)* | |
O1W | 1.0878 (3) | 0.2596 (3) | 0.5849 (3) | 0.0568 (6) | |
O2W | 0.6945 (3) | 0.7508 (4) | 0.7980 (3) | 0.0660 (7) | |
O3W | 0.6382 (3) | 0.4155 (3) | 0.2944 (3) | 0.0590 (6) | |
H11 | 1.046 (6) | 0.265 (6) | 0.526 (5) | 0.095 (18)* | |
H12 | 1.168 (5) | 0.352 (5) | 0.625 (4) | 0.067 (12)* | |
H21 | 0.717 (5) | 0.829 (5) | 0.858 (4) | 0.063 (12)* | |
H22 | 0.772 (5) | 0.782 (5) | 0.776 (4) | 0.064 (12)* | |
H31 | 0.649 (5) | 0.330 (4) | 0.265 (4) | 0.075 (12)* | |
H32 | 0.550 (5) | 0.373 (5) | 0.277 (4) | 0.054 (11)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Fe | 0.02654 (19) | 0.02225 (19) | 0.02768 (19) | 0.00942 (14) | 0.01073 (14) | 0.00871 (14) |
F1 | 0.0992 (16) | 0.0461 (10) | 0.0417 (10) | 0.0295 (11) | 0.0150 (10) | −0.0069 (8) |
F2 | 0.0495 (9) | 0.0373 (8) | 0.0437 (9) | 0.0118 (7) | 0.0234 (7) | 0.0211 (7) |
F3 | 0.0338 (8) | 0.0473 (9) | 0.0622 (10) | 0.0206 (7) | 0.0079 (7) | 0.0244 (8) |
F4 | 0.0472 (10) | 0.0500 (10) | 0.0602 (10) | 0.0053 (8) | 0.0147 (8) | 0.0373 (9) |
F5 | 0.0473 (9) | 0.0379 (8) | 0.0333 (8) | 0.0151 (7) | 0.0146 (7) | 0.0019 (6) |
F6 | 0.0478 (10) | 0.0597 (11) | 0.0797 (13) | 0.0361 (9) | 0.0190 (9) | 0.0295 (10) |
F7 | 0.0372 (8) | 0.0356 (7) | 0.0377 (8) | 0.0180 (6) | 0.0152 (6) | 0.0176 (6) |
C1 | 0.0341 (13) | 0.0253 (11) | 0.0363 (13) | 0.0133 (10) | 0.0121 (10) | 0.0119 (10) |
C2 | 0.0322 (13) | 0.0263 (12) | 0.0356 (13) | 0.0135 (10) | 0.0113 (10) | 0.0103 (10) |
C3 | 0.0329 (13) | 0.0285 (12) | 0.0463 (15) | 0.0130 (11) | 0.0113 (11) | 0.0161 (11) |
C4 | 0.0283 (12) | 0.0379 (14) | 0.0374 (13) | 0.0118 (11) | 0.0116 (10) | 0.0150 (11) |
C5 | 0.0281 (12) | 0.0323 (13) | 0.0375 (13) | 0.0134 (11) | 0.0099 (10) | 0.0146 (11) |
C6 | 0.0327 (13) | 0.0388 (14) | 0.0419 (14) | 0.0190 (11) | 0.0154 (11) | 0.0181 (11) |
N1 | 0.0287 (10) | 0.0243 (10) | 0.0363 (11) | 0.0094 (8) | 0.0116 (8) | 0.0123 (8) |
N2 | 0.0306 (11) | 0.0338 (11) | 0.0416 (12) | 0.0155 (9) | 0.0113 (9) | 0.0122 (9) |
N3 | 0.0316 (11) | 0.0329 (11) | 0.0376 (11) | 0.0054 (9) | 0.0138 (9) | 0.0137 (9) |
N4 | 0.0370 (11) | 0.0281 (10) | 0.0380 (11) | 0.0173 (9) | 0.0120 (9) | 0.0112 (9) |
O1W | 0.0420 (13) | 0.0576 (15) | 0.0708 (16) | 0.0241 (12) | 0.0092 (11) | 0.0318 (13) |
O2W | 0.0440 (14) | 0.0710 (17) | 0.0466 (13) | 0.0213 (12) | 0.0098 (11) | −0.0055 (13) |
O3W | 0.0513 (15) | 0.0470 (13) | 0.0641 (15) | 0.0233 (12) | 0.0159 (12) | 0.0085 (11) |
Fe—F1 | 1.8968 (17) | C5—H5E | 0.9700 |
Fe—F4 | 1.9083 (15) | C6—N4 | 1.487 (3) |
Fe—F5 | 1.9157 (14) | C6—H6D | 0.9700 |
Fe—F6 | 1.9234 (17) | C6—H6E | 0.9700 |
Fe—F2 | 1.9405 (14) | N1—H1A | 0.8900 |
Fe—F3 | 1.9468 (15) | N1—H1B | 0.8900 |
C1—N1 | 1.475 (3) | N1—H1C | 0.8900 |
C1—C2 | 1.519 (3) | N2—H2A | 0.8900 |
C1—H1D | 0.9700 | N2—H2B | 0.8900 |
C1—H1E | 0.9700 | N2—H2C | 0.8900 |
C2—C3 | 1.508 (3) | N3—H3A | 0.8900 |
C2—H2D | 0.9700 | N3—H3B | 0.8900 |
C2—H2E | 0.9700 | N3—H3C | 0.8900 |
C3—N2 | 1.483 (3) | N4—H4A | 0.8900 |
C3—H3D | 0.9700 | N4—H4B | 0.8900 |
C3—H3E | 0.9700 | N4—H4C | 0.8900 |
C4—N3 | 1.480 (3) | O1W—H11 | 0.75 (5) |
C4—C5 | 1.520 (3) | O1W—H12 | 0.81 (4) |
C4—H4D | 0.9700 | O2W—H21 | 0.76 (4) |
C4—H4E | 0.9700 | O2W—H22 | 0.76 (4) |
C5—C6 | 1.511 (3) | O3W—H31 | 0.87 (4) |
C5—H5D | 0.9700 | O3W—H32 | 0.73 (4) |
F1—Fe—F4 | 92.30 (9) | C6—C5—C4 | 110.7 (2) |
F1—Fe—F5 | 177.01 (8) | C6—C5—H5D | 109.5 |
F4—Fe—F5 | 90.69 (8) | C4—C5—H5D | 109.5 |
F1—Fe—F6 | 89.93 (10) | C6—C5—H5E | 109.5 |
F4—Fe—F6 | 91.86 (8) | C4—C5—H5E | 109.5 |
F5—Fe—F6 | 90.04 (8) | H5D—C5—H5E | 108.1 |
F1—Fe—F2 | 89.21 (8) | N4—C6—C5 | 111.1 (2) |
F4—Fe—F2 | 175.81 (8) | N4—C6—H6D | 109.4 |
F5—Fe—F2 | 87.80 (7) | C5—C6—H6D | 109.4 |
F6—Fe—F2 | 92.04 (8) | N4—C6—H6E | 109.4 |
F1—Fe—F3 | 89.45 (9) | C5—C6—H6E | 109.4 |
F4—Fe—F3 | 88.01 (8) | H6D—C6—H6E | 108.0 |
F5—Fe—F3 | 90.59 (7) | C1—N1—H1A | 109.5 |
F6—Fe—F3 | 179.36 (8) | C1—N1—H1B | 109.5 |
F2—Fe—F3 | 88.10 (7) | H1A—N1—H1B | 109.5 |
N1—C1—C2 | 112.05 (19) | C1—N1—H1C | 109.5 |
N1—C1—H1D | 109.2 | H1A—N1—H1C | 109.5 |
C2—C1—H1D | 109.2 | H1B—N1—H1C | 109.5 |
N1—C1—H1E | 109.2 | C3—N2—H2A | 109.5 |
C2—C1—H1E | 109.2 | C3—N2—H2B | 109.5 |
H1D—C1—H1E | 107.9 | H2A—N2—H2B | 109.5 |
C3—C2—C1 | 109.6 (2) | C3—N2—H2C | 109.5 |
C3—C2—H2D | 109.7 | H2A—N2—H2C | 109.5 |
C1—C2—H2D | 109.7 | H2B—N2—H2C | 109.5 |
C3—C2—H2E | 109.7 | C4—N3—H3A | 109.5 |
C1—C2—H2E | 109.7 | C4—N3—H3B | 109.5 |
H2D—C2—H2E | 108.2 | H3A—N3—H3B | 109.5 |
N2—C3—C2 | 112.1 (2) | C4—N3—H3C | 109.5 |
N2—C3—H3D | 109.2 | H3A—N3—H3C | 109.5 |
C2—C3—H3D | 109.2 | H3B—N3—H3C | 109.5 |
N2—C3—H3E | 109.2 | C6—N4—H4A | 109.5 |
C2—C3—H3E | 109.2 | C6—N4—H4B | 109.5 |
H3D—C3—H3E | 107.9 | H4A—N4—H4B | 109.5 |
N3—C4—C5 | 110.4 (2) | C6—N4—H4C | 109.5 |
N3—C4—H4D | 109.6 | H4A—N4—H4C | 109.5 |
C5—C4—H4D | 109.6 | H4B—N4—H4C | 109.5 |
N3—C4—H4E | 109.6 | H11—O1W—H12 | 106 (5) |
C5—C4—H4E | 109.6 | H21—O2W—H22 | 101 (4) |
H4D—C4—H4E | 108.1 | H31—O3W—H32 | 100 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···F2i | 0.89 | 2.03 | 2.826 (3) | 148 |
N1—H1B···F5i | 0.89 | 2.22 | 2.839 (3) | 127 |
N2—H2A···F4ii | 0.89 | 1.82 | 2.672 (3) | 161 |
N2—H2B···F7ii | 0.89 | 1.85 | 2.735 (3) | 172 |
N2—H2C···O1Wiii | 0.89 | 2.22 | 2.926 (3) | 136 |
N2—H2C···F6iii | 0.89 | 2.47 | 3.139 (3) | 132 |
N3—H3A···F3ii | 0.89 | 1.95 | 2.777 (3) | 155 |
N3—H3A···F4ii | 0.89 | 2.47 | 3.135 (3) | 132 |
N3—H3B···F3iv | 0.89 | 1.93 | 2.762 (3) | 156 |
N4—H4A···F7v | 0.89 | 1.86 | 2.728 (3) | 164 |
N4—H4B···F6vi | 0.89 | 2.09 | 2.886 (3) | 149 |
N4—H4B···F1vi | 0.89 | 2.33 | 3.029 (3) | 135 |
O1W—H12···O3Wi | 0.81 (4) | 1.99 (4) | 2.787 (4) | 173 (4) |
O2W—H21···F1vi | 0.76 (4) | 1.91 (4) | 2.606 (3) | 153 (4) |
O2W—H22···F6i | 0.76 (4) | 1.99 (4) | 2.747 (3) | 171 (4) |
O3W—H32···O2Wvii | 0.73 (4) | 2.04 (4) | 2.766 (4) | 173 (4) |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y, −z+1; (iii) x−1, y, z; (iv) x, y, z+1; (v) −x+2, −y+1, −z+2; (vi) x, y+1, z+1; (vii) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | (C3H12N2)2[FeF6]F·3H2O |
Mr | 395.18 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 295 |
a, b, c (Å) | 9.844 (1), 9.847 (1), 10.7740 (8) |
α, β, γ (°) | 106.959 (7), 95.379 (6), 118.914 (9) |
V (Å3) | 839.35 (17) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.98 |
Crystal size (mm) | 0.32 × 0.07 × 0.07 |
Data collection | |
Diffractometer | SIEMENS AED2 diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 2920, 2920, 2599 |
Rint | 0.000 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.093, 1.14 |
No. of reflections | 2920 |
No. of parameters | 219 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.42, −0.35 |
Computer programs: STADI4 (Stoe & Cie, 1998), X-RED (Stoe & Cie, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 1999), DIAMOND (Brandenburg & Putz, 2004) and ORTEP-3 (Farrugia, 1997), enCIFer (Allen et al., 2004).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1B···F2i | 0.89 | 2.03 | 2.826 (3) | 148.2 |
N1—H1B···F5i | 0.89 | 2.22 | 2.839 (3) | 126.6 |
N2—H2A···F4ii | 0.89 | 1.82 | 2.672 (3) | 160.9 |
N2—H2B···F7ii | 0.89 | 1.85 | 2.735 (3) | 172.3 |
N2—H2C···O1Wiii | 0.89 | 2.22 | 2.926 (3) | 136.0 |
N2—H2C···F6iii | 0.89 | 2.47 | 3.139 (3) | 132.0 |
N3—H3A···F3ii | 0.89 | 1.95 | 2.777 (3) | 154.6 |
N3—H3A···F4ii | 0.89 | 2.47 | 3.135 (3) | 131.6 |
N3—H3B···F3iv | 0.89 | 1.93 | 2.762 (3) | 155.9 |
N4—H4A···F7v | 0.89 | 1.86 | 2.728 (3) | 163.9 |
N4—H4B···F6vi | 0.89 | 2.09 | 2.886 (3) | 148.9 |
N4—H4B···F1vi | 0.89 | 2.33 | 3.029 (3) | 135.2 |
O1W—H12···O3Wi | 0.81 (4) | 1.99 (4) | 2.787 (4) | 173 (4) |
O2W—H21···F1vi | 0.76 (4) | 1.91 (4) | 2.606 (3) | 153 (4) |
O2W—H22···F6i | 0.76 (4) | 1.99 (4) | 2.747 (3) | 171 (4) |
O3W—H32···O2Wvii | 0.73 (4) | 2.04 (4) | 2.766 (4) | 173 (4) |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+1, −y, −z+1; (iii) x−1, y, z; (iv) x, y, z+1; (v) −x+2, −y+1, −z+2; (vi) x, y+1, z+1; (vii) −x+1, −y+1, −z+1. |
Acknowledgements
The authors thank Professor L. S. Smiri for helpful discussions.
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The structure of the title compound (H2dap)2[FeF6](F).3H2O (I) consists of isolated FeF6 octahedra, diprotonated 1,3-diaminopropane (H2dap)2+ cations and three water molecules of solvation connected by a three-dimensional framework of hydrogen bonds in which isolated fluoride anions are located (Figure 1 and Figure 2). In (I) the [FeF6] complex anion adopts a slightly distorted octahedral environment, the Fe—F bond distance range [1.897 (2)–1.947 (2) Å] being typical of an octahedral ironIII environment. Each octahedral FeF63- anion is surrounded by four separate hydrogen-bonded water molecules in the equatorial sites and by seven separate aminium cation donor groups (Figure 3). The axial F atoms (F2, F4) are involved only in N–H···F interactions (Table 1). One of the equatorial F atom (F3), which has the longest Fe–F bond distance [1.947 (2)] Å), establishes three hydrogen bonds and consequently presents a low valence (0.47) with FeIII.
In fluoride metallates, "free" fluoride ions, are always surrounded by amine groups and their coordination number varies from 3 to 6. Also F···N distances increase with the coordination number (Steiner, 1998). In the title compound, "free" F ions adopt a tetrahedral coordination with four hydrogen atoms from four H2dap cations (Figure 4). The three hydrogen-bonded water molecules form trimer clusters, presenting various triangular environments with F acceptor atoms of the FeF6 octahedra and H donor atoms of the cation aminium groups (Figure 5). The infrared absorption spectrum of the title compound gives information on the organic moiety (C—C, C—N) and on the oxidation state of the iron atom, the presence of a vibrational band in the neighbourhood of 487 cm-1 being consistent with iron(III).