metal-organic compounds
Poly[tetrakis(μ-1,1,1,3,3,3-hexafluoropropan-2-olato)iron(II)dipotassium]
aNaval Research Laboratory, Chemistry Division, Code 6100, 4555 Overlook Av, SW, Washington DC 20375, USA, and bDepartment of Chemistry, Howard University, 525 College Street NW, Washington DC, 20059, USA
*Correspondence e-mail: andrew.purdy@nrl.navy.mil
The title compound, [K2Fe{OCH(CF3)2}4]n, was formed from the reaction of potassium hexafluoroisopropoxide with iron(II) chloride in toluene. The FeII atom has a highly distorted tetrahedral coordination environment. All four of the non-equivalent hexafluoroisopropoxy O atoms link the FeII atoms to one of the K+ atoms in an alternating chain of Fe—O—K—O fused four-membered rings, with K—Fe distances of 3.715 (2) and 3.717 (2) Å. This K+ atom is also bridged to eight of the F atoms. The other K+ atom is bonded to only two of the O atoms, but has seven short K⋯F contacts, one of which links the chains into a three-dimensional arrangement. Weak hydrogen bonding between the lone H atoms on the hexafluoroisopropoxy groups and F atoms is also present. The crystal studied was refined as an inversion twin.
CCDC reference: 979172
Related literature
For alkali or alkaline earth metal fluoroalkoxides with short F—A distances, see: Zheng et al. (2009); Yamashita et al. (2005); Bernhardt et al. (2007); Purdy & George (1991, 1994); Samuels et al. (1993); Purdy et al. (1991). For iron(II) fluoroalkoxides, see: Konefal et al. (1986); Cantalupo et al. (2010, 2012).
Experimental
Crystal data
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Data collection: CrysAlis PRO (Agilent, 2012); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
CCDC reference: 979172
10.1107/S1600536813034946/nk2215sup1.cif
contains datablocks I, New_Global_Publ_Block. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813034946/nk2215Isup2.hkl
All manipulations were performed under inert atmosphere (Ar). Sublimed FeCl2 (0.66 g, 5.21 mmol) and potassium hexafluoroisopropoxide (2.16 g, 10.48 mmol) were combined in 20 ml toluene in an H-tube equipped with a fine frit, and sonicated for a week. Mixture was filtered and rewashed 3x with recondensed hot toluene. Some product is slightly soluble in toluene and that solution was allowed to evaporate slowly in a flask in the drybox. Pale yellow crystals resulted, and a crystal of the title compound was obtained from this sample. (The crystals looked pale yellow in bulk but individual crystals appeared almost colorless.) A total of 0.56 g was isolated. NMR: 19F (THF solution, CFCl3 ref) -37.89.
The iron atoms have a highly distorted tetrahedral coordination by the four O atoms of the hexafluoroisopropoxide ligands, with the O—Fe—O angles ranging from 93.9 (2) to 143.1 (2) °. The two longest Fe—O bonds (2.047 (6) and 2.048 (6) Å) are to the O atoms O1A and O1C, which are also bridged to both K1 and K2. The shorter Fe—O bonds (1.948 (6) and 1.950 (6) Å) are to O1B and O1D, which are bridged only to K1 atoms. While the metal atoms are linked in a zigzag chain along b by coordination to these O atoms, coordination of the fluorine atoms to the potassium atoms completes the potassium coordination spheres. K2 is 9-coordinate and is linked to O1A and O1C (2.689 (6) and 2.698 (7) Å), and 7 fluorine atoms on the HFIP groups, with K—F contacts ranging from 2.798 (8) to 3.088 (7) Å. One fluorine atom, F6C, links K2 to a symmetry
K1 is 12-coordinate with two short K—O bonds of 2.674 (6) and 2.692 (7) Å and two longer K—O bonds of 2.891 (6) and 2.863 (7). The eight K—F contacts range from 2.861 (6) to 3.221 (7) Å. Close contacts between alkali or alkaline earth cations and the fluorine atoms of a fluoroalkoxy ligand are very common and occur in many compounds that have been structurally characterized. Some examples include Na2Cu(OCH(CF3)2)4 (Purdy, et al. 1991), BaCu(OCH(CF3)2)4(THF)4 (Purdy and George, 1994), (18-Crown-6)-(1,1-bis(trifluoromethyl)-1H-anthra(1,9-bc)furan-10-olato-F, O)-potassium (Yamashita, et al., 2005), and some potassium perfluoroalkoxyborates (Bernhardt, et al., 2007). The nature of the bonding between fluorines on fluoroalkoxy groups and electropositive metal ions was explained by a combination of orbital overlap and electrostatics (Samuels et al., 1993). Weak C—H···F hydrogen bonding is also present with all the hexafluoroisopropoxy protons.For alkali or alkaline earth metal fluoroalkoxides with short F—A distances, see: Zheng et al. (2009); Yamashita et al. (2005); Bernhardt et al. (2007); Purdy & George (1991, 1994); Samuels et al. (1993); Purdy et al. (1991). For iron(II) fluoroalkoxides, see: Konefal et al. (1986); Cantalupo et al. (2010, 2012).
Data collection: CrysAlis PRO (Agilent, 2012); cell
CrysAlis PRO (Agilent, 2012); data reduction: CrysAlis PRO (Agilent, 2012); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. Structure of the repeat unit of [K2Fe(OCH(CF3)2)4]. Ellipsoids are at the 30% probability level. | |
Fig. 2. Diagram showing the potassium coordination environment. | |
Fig. 3. Packing diagram depicting some of the hydrogen bonding. |
[FeK2(C3HF6O)4] | Dx = 2.215 Mg m−3 |
Mr = 802.20 | Cu Kα radiation, λ = 1.54184 Å |
Orthorhombic, P212121 | Cell parameters from 8115 reflections |
a = 9.7368 (2) Å | θ = 3.3–75.5° |
b = 13.4345 (4) Å | µ = 10.15 mm−1 |
c = 18.3933 (4) Å | T = 123 K |
V = 2406.02 (10) Å3 | Prism, colorless |
Z = 4 | 0.43 × 0.21 × 0.17 mm |
F(000) = 1552 |
Agilent Xcalibur (Ruby, Gemini) diffractometer | 4923 independent reflections |
Radiation source: Enhance (Cu) X-ray Source | 4190 reflections with I > 2σ(I) |
Detector resolution: 10.5081 pixels mm-1 | Rint = 0.100 |
ω scans | θmax = 75.7°, θmin = 4.1° |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | h = −12→8 |
Tmin = 0.254, Tmax = 1.000 | k = −16→16 |
16099 measured reflections | l = −22→17 |
Refinement on F2 | Hydrogen site location: inferred from neighbouring sites |
Least-squares matrix: full | H-atom parameters constrained |
R[F2 > 2σ(F2)] = 0.068 | w = 1/[σ2(Fo2) + (0.1306P)2] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.182 | (Δ/σ)max < 0.001 |
S = 1.02 | Δρmax = 1.63 e Å−3 |
4923 reflections | Δρmin = −1.29 e Å−3 |
389 parameters | Absolute structure: Refined as an inversion twin |
144 restraints | Absolute structure parameter: 0.205 (11) |
[FeK2(C3HF6O)4] | V = 2406.02 (10) Å3 |
Mr = 802.20 | Z = 4 |
Orthorhombic, P212121 | Cu Kα radiation |
a = 9.7368 (2) Å | µ = 10.15 mm−1 |
b = 13.4345 (4) Å | T = 123 K |
c = 18.3933 (4) Å | 0.43 × 0.21 × 0.17 mm |
Agilent Xcalibur (Ruby, Gemini) diffractometer | 4923 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | 4190 reflections with I > 2σ(I) |
Tmin = 0.254, Tmax = 1.000 | Rint = 0.100 |
16099 measured reflections |
R[F2 > 2σ(F2)] = 0.068 | H-atom parameters constrained |
wR(F2) = 0.182 | Δρmax = 1.63 e Å−3 |
S = 1.02 | Δρmin = −1.29 e Å−3 |
4923 reflections | Absolute structure: Refined as an inversion twin |
389 parameters | Absolute structure parameter: 0.205 (11) |
144 restraints |
Experimental. Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refined as a 2-component inversion twin. The structure was a racemic twin with a BASF component of 0.20906. In spite of the fact that the data was collected at -150 ° C the CF3 groups had some problems. Disorder was looked at without success but the best solution was to restrain using ISOR compound for some (but not all) F's. |
x | y | z | Uiso*/Ueq | ||
Fe | 0.41997 (13) | 0.23850 (10) | 0.28502 (6) | 0.0109 (3) | |
K1 | 0.41988 (19) | 0.48834 (14) | 0.19850 (9) | 0.0162 (4) | |
K2 | 0.69671 (19) | 0.23877 (16) | 0.16065 (9) | 0.0196 (4) | |
O1A | 0.6217 (6) | 0.1993 (5) | 0.2983 (3) | 0.0152 (12) | |
C1A | 0.6962 (9) | 0.2291 (6) | 0.3584 (4) | 0.0145 (16) | |
H1AA | 0.6995 | 0.3035 | 0.3588 | 0.017* | |
C2A | 0.6316 (10) | 0.1946 (7) | 0.4284 (5) | 0.0186 (18) | |
C3A | 0.8423 (10) | 0.1903 (8) | 0.3490 (5) | 0.024 (2) | |
F1A | 0.6251 (7) | 0.0950 (4) | 0.4340 (3) | 0.0284 (14) | |
F2A | 0.6983 (7) | 0.2266 (5) | 0.4876 (3) | 0.0347 (15) | |
F3A | 0.5028 (6) | 0.2283 (5) | 0.4341 (3) | 0.0272 (13) | |
F4A | 0.8480 (7) | 0.0916 (5) | 0.3445 (4) | 0.0320 (14) | |
F5A | 0.9267 (7) | 0.2178 (6) | 0.4034 (4) | 0.0449 (18) | |
F6A | 0.8971 (6) | 0.2258 (6) | 0.2876 (4) | 0.0378 (16) | |
O1B | 0.3535 (7) | 0.1029 (5) | 0.2980 (4) | 0.0181 (13) | |
C1B | 0.2276 (9) | 0.0657 (7) | 0.3165 (5) | 0.0170 (18) | |
H1BA | 0.1580 | 0.1204 | 0.3163 | 0.020* | |
C2B | 0.1877 (11) | −0.0141 (8) | 0.2603 (5) | 0.025 (2) | |
C3B | 0.2342 (11) | 0.0183 (8) | 0.3922 (6) | 0.026 (2) | |
F1B | 0.1707 (8) | 0.0271 (6) | 0.1949 (3) | 0.0406 (17) | |
F2B | 0.0739 (8) | −0.0631 (6) | 0.2766 (4) | 0.047 (2) | |
F3B | 0.2873 (7) | −0.0833 (5) | 0.2517 (3) | 0.0323 (14) | |
F4B | 0.1165 (8) | −0.0222 (6) | 0.4141 (4) | 0.0458 (19) | |
F5B | 0.3307 (8) | −0.0548 (5) | 0.3957 (3) | 0.0351 (15) | |
F6B | 0.2697 (9) | 0.0858 (6) | 0.4414 (4) | 0.0445 (19) | |
O1C | 0.4260 (6) | 0.2752 (4) | 0.1770 (3) | 0.0139 (11) | |
C1C | 0.3268 (9) | 0.2457 (7) | 0.1284 (4) | 0.0144 (16) | |
H1CA | 0.3238 | 0.1713 | 0.1277 | 0.017* | |
C2C | 0.1858 (9) | 0.2841 (7) | 0.1495 (5) | 0.0175 (17) | |
C3C | 0.3700 (10) | 0.2821 (7) | 0.0534 (5) | 0.0177 (18) | |
F1C | 0.1787 (6) | 0.3837 (5) | 0.1504 (3) | 0.0304 (14) | |
F2C | 0.1552 (6) | 0.2545 (5) | 0.2178 (3) | 0.0260 (12) | |
F3C | 0.0838 (6) | 0.2516 (6) | 0.1074 (3) | 0.0341 (14) | |
F4C | 0.3812 (7) | 0.3802 (5) | 0.0496 (3) | 0.0325 (15) | |
F5C | 0.4927 (6) | 0.2443 (5) | 0.0362 (3) | 0.0295 (13) | |
F6C | 0.2830 (7) | 0.2540 (6) | 0.0002 (3) | 0.0342 (14) | |
O1D | 0.3927 (7) | 0.3754 (5) | 0.3173 (3) | 0.0165 (12) | |
C1D | 0.3404 (10) | 0.4119 (7) | 0.3802 (5) | 0.0171 (18) | |
H1DA | 0.3309 | 0.3563 | 0.4160 | 0.020* | |
C2D | 0.4377 (10) | 0.4903 (8) | 0.4112 (5) | 0.023 (2) | |
C3D | 0.1970 (12) | 0.4569 (8) | 0.3651 (5) | 0.024 (2) | |
F1D | 0.2019 (6) | 0.5245 (5) | 0.3110 (3) | 0.0318 (14) | |
F2D | 0.1412 (7) | 0.5024 (6) | 0.4213 (3) | 0.0421 (19) | |
F3D | 0.1113 (7) | 0.3866 (6) | 0.3436 (4) | 0.0391 (17) | |
F4D | 0.4577 (7) | 0.5661 (5) | 0.3630 (4) | 0.0351 (15) | |
F5D | 0.3921 (8) | 0.5317 (6) | 0.4723 (4) | 0.046 (2) | |
F6D | 0.5606 (7) | 0.4520 (6) | 0.4243 (4) | 0.0359 (16) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Fe | 0.0062 (5) | 0.0223 (7) | 0.0041 (5) | 0.0004 (5) | −0.0009 (4) | 0.0011 (5) |
K1 | 0.0121 (8) | 0.0246 (9) | 0.0119 (7) | −0.0017 (7) | 0.0010 (7) | 0.0019 (6) |
K2 | 0.0133 (8) | 0.0323 (10) | 0.0134 (7) | 0.0013 (8) | 0.0029 (7) | 0.0011 (7) |
O1A | 0.010 (2) | 0.024 (3) | 0.011 (2) | 0.003 (2) | −0.002 (2) | 0.002 (2) |
C1A | 0.014 (2) | 0.0158 (19) | 0.0142 (19) | −0.0003 (13) | −0.0017 (13) | 0.0004 (13) |
C2A | 0.018 (3) | 0.023 (3) | 0.015 (3) | 0.000 (3) | −0.006 (3) | −0.002 (3) |
C3A | 0.015 (4) | 0.040 (5) | 0.017 (4) | −0.001 (4) | −0.009 (4) | 0.000 (4) |
F1A | 0.041 (4) | 0.031 (3) | 0.014 (2) | 0.001 (3) | −0.003 (2) | 0.003 (2) |
F2A | 0.041 (3) | 0.050 (4) | 0.012 (2) | 0.001 (3) | −0.016 (2) | −0.002 (2) |
F3A | 0.022 (3) | 0.048 (4) | 0.012 (2) | 0.010 (3) | 0.005 (2) | 0.002 (2) |
F4A | 0.019 (3) | 0.039 (4) | 0.038 (3) | 0.009 (3) | −0.004 (3) | −0.002 (3) |
F5A | 0.021 (3) | 0.069 (4) | 0.045 (4) | −0.002 (3) | −0.023 (3) | −0.010 (3) |
F6A | 0.012 (3) | 0.062 (4) | 0.039 (4) | −0.001 (3) | 0.009 (2) | 0.008 (3) |
O1B | 0.010 (2) | 0.021 (3) | 0.023 (3) | −0.001 (2) | 0.004 (2) | 0.000 (2) |
C1B | 0.013 (3) | 0.021 (3) | 0.017 (3) | 0.002 (3) | 0.004 (3) | 0.001 (3) |
C2B | 0.020 (5) | 0.033 (5) | 0.021 (4) | −0.006 (4) | 0.000 (4) | 0.003 (4) |
C3B | 0.023 (4) | 0.032 (4) | 0.022 (3) | −0.001 (3) | 0.008 (3) | −0.004 (3) |
F1B | 0.042 (4) | 0.060 (4) | 0.019 (3) | −0.006 (3) | −0.013 (3) | 0.005 (3) |
F2B | 0.026 (4) | 0.073 (5) | 0.042 (4) | −0.031 (4) | 0.008 (3) | −0.011 (3) |
F3B | 0.035 (4) | 0.036 (3) | 0.026 (3) | 0.003 (3) | −0.002 (3) | −0.009 (3) |
F4B | 0.030 (4) | 0.075 (5) | 0.033 (3) | −0.017 (3) | 0.017 (3) | 0.008 (3) |
F5B | 0.036 (4) | 0.046 (4) | 0.022 (3) | 0.008 (3) | 0.000 (3) | 0.007 (3) |
F6B | 0.049 (5) | 0.063 (5) | 0.022 (3) | −0.004 (4) | 0.006 (3) | −0.016 (3) |
O1C | 0.0133 (16) | 0.0168 (16) | 0.0114 (15) | 0.0003 (12) | −0.0011 (12) | 0.0006 (12) |
C1C | 0.014 (3) | 0.020 (3) | 0.009 (3) | 0.001 (3) | −0.002 (2) | 0.001 (3) |
C2C | 0.011 (3) | 0.029 (3) | 0.013 (3) | 0.000 (3) | 0.001 (3) | −0.002 (3) |
C3C | 0.014 (3) | 0.027 (3) | 0.012 (3) | 0.002 (3) | −0.002 (3) | 0.002 (3) |
F1C | 0.017 (3) | 0.042 (3) | 0.032 (3) | 0.009 (3) | 0.005 (2) | 0.004 (3) |
F2C | 0.016 (2) | 0.048 (3) | 0.014 (2) | 0.001 (2) | 0.0067 (19) | 0.004 (2) |
F3C | 0.014 (2) | 0.064 (4) | 0.025 (3) | −0.004 (3) | −0.007 (2) | −0.008 (3) |
F4C | 0.037 (4) | 0.046 (4) | 0.014 (2) | 0.002 (3) | 0.000 (2) | 0.010 (2) |
F5C | 0.024 (2) | 0.048 (3) | 0.017 (2) | 0.007 (2) | 0.0095 (19) | 0.002 (2) |
F6C | 0.033 (3) | 0.055 (3) | 0.014 (2) | −0.003 (3) | −0.009 (2) | −0.002 (2) |
O1D | 0.0175 (17) | 0.0181 (16) | 0.0141 (16) | 0.0006 (12) | 0.0022 (12) | −0.0007 (12) |
C1D | 0.014 (3) | 0.024 (3) | 0.013 (3) | 0.000 (3) | 0.000 (3) | 0.001 (3) |
C2D | 0.021 (5) | 0.037 (6) | 0.012 (4) | 0.004 (4) | −0.003 (3) | −0.004 (4) |
C3D | 0.024 (4) | 0.031 (4) | 0.018 (3) | −0.001 (3) | 0.004 (3) | 0.000 (3) |
F1D | 0.023 (3) | 0.052 (4) | 0.021 (3) | 0.006 (3) | 0.000 (2) | 0.011 (3) |
F2D | 0.028 (3) | 0.082 (5) | 0.016 (3) | 0.021 (4) | 0.005 (2) | −0.012 (3) |
F3D | 0.020 (3) | 0.066 (5) | 0.032 (3) | −0.010 (3) | −0.001 (3) | −0.003 (3) |
F4D | 0.029 (4) | 0.035 (4) | 0.041 (4) | −0.010 (3) | −0.006 (3) | 0.003 (3) |
F5D | 0.034 (4) | 0.076 (5) | 0.026 (3) | 0.001 (4) | −0.001 (3) | −0.031 (3) |
F6D | 0.020 (3) | 0.054 (4) | 0.035 (3) | 0.005 (3) | −0.015 (3) | −0.006 (3) |
Fe—O1B | 1.948 (6) | F1A—K1i | 2.861 (6) |
Fe—O1D | 1.950 (6) | F4A—K1i | 3.058 (7) |
Fe—O1C | 2.047 (6) | O1B—C1B | 1.367 (11) |
Fe—O1A | 2.048 (6) | O1B—K1i | 2.692 (7) |
Fe—K2 | 3.535 (2) | C1B—C3B | 1.532 (13) |
Fe—K1 | 3.715 (2) | C1B—C2B | 1.540 (13) |
Fe—K1i | 3.717 (2) | C1B—H1BA | 1.0000 |
K1—O1D | 2.674 (6) | C2B—F2B | 1.323 (12) |
K1—O1Bii | 2.692 (7) | C2B—F1B | 1.335 (11) |
K1—F1Aii | 2.861 (6) | C2B—F3B | 1.353 (13) |
K1—O1Aii | 2.863 (7) | C3B—F6B | 1.326 (13) |
K1—F1C | 2.877 (7) | C3B—F4B | 1.331 (12) |
K1—O1C | 2.891 (6) | C3B—F5B | 1.361 (13) |
K1—F1D | 3.003 (6) | F3B—K2i | 2.888 (7) |
K1—F5Bii | 3.039 (7) | F3B—K1i | 3.145 (7) |
K1—F4Aii | 3.058 (7) | F5B—K2i | 2.973 (7) |
K1—F4C | 3.123 (6) | F5B—K1i | 3.039 (7) |
K1—F3Bii | 3.145 (7) | O1C—C1C | 1.375 (10) |
K1—F4D | 3.221 (7) | C1C—C2C | 1.517 (12) |
K2—O1A | 2.689 (6) | C1C—C3C | 1.522 (11) |
K2—O1C | 2.698 (7) | C1C—H1CA | 1.0000 |
K2—F4Di | 2.798 (8) | C2C—F3C | 1.334 (11) |
K2—F3Bii | 2.888 (7) | C2C—F1C | 1.340 (12) |
K2—F5Bii | 2.973 (7) | C2C—F2C | 1.349 (10) |
K2—F5C | 3.032 (6) | C3C—F4C | 1.324 (12) |
K2—F6A | 3.048 (7) | C3C—F5C | 1.336 (11) |
K2—F6Ciii | 3.077 (6) | C3C—F6C | 1.349 (10) |
K2—F1Di | 3.088 (7) | F6C—K2iv | 3.077 (6) |
K2—K1i | 4.395 (3) | O1D—C1D | 1.356 (10) |
O1A—C1A | 1.381 (10) | C1D—C2D | 1.528 (13) |
O1A—K1i | 2.863 (6) | C1D—C3D | 1.547 (14) |
C1A—C2A | 1.507 (12) | C1D—H1DA | 1.0000 |
C1A—C3A | 1.524 (13) | C2D—F6D | 1.325 (12) |
C1A—H1AA | 1.0000 | C2D—F5D | 1.330 (11) |
C2A—F3A | 1.337 (12) | C2D—F4D | 1.365 (12) |
C2A—F2A | 1.338 (10) | C3D—F2D | 1.319 (11) |
C2A—F1A | 1.344 (12) | C3D—F3D | 1.321 (13) |
C3A—F4A | 1.330 (13) | C3D—F1D | 1.348 (11) |
C3A—F6A | 1.337 (12) | F1D—K2ii | 3.088 (7) |
C3A—F5A | 1.347 (11) | F4D—K2ii | 2.798 (8) |
O1B—Fe—O1D | 143.0 (3) | F1Di—K2—Fe | 97.66 (13) |
O1B—Fe—O1C | 110.7 (3) | O1A—K2—K1 | 80.40 (13) |
O1D—Fe—O1C | 94.1 (2) | O1C—K2—K1 | 40.37 (13) |
O1B—Fe—O1A | 93.6 (3) | F4Di—K2—K1 | 109.28 (15) |
O1D—Fe—O1A | 109.7 (3) | F3Bii—K2—K1 | 46.14 (14) |
O1C—Fe—O1A | 98.7 (2) | F5Bii—K2—K1 | 44.14 (14) |
O1B—Fe—K2 | 109.49 (19) | F5C—K2—K1 | 72.34 (13) |
O1D—Fe—K2 | 107.45 (19) | F6A—K2—K1 | 108.52 (14) |
O1C—Fe—K2 | 49.45 (18) | F6Ciii—K2—K1 | 107.35 (15) |
O1A—Fe—K2 | 49.21 (17) | F1Di—K2—K1 | 152.62 (13) |
O1B—Fe—K1 | 153.8 (2) | Fe—K2—K1 | 54.96 (4) |
O1D—Fe—K1 | 43.83 (18) | O1A—K2—K1i | 39.07 (14) |
O1C—Fe—K1 | 50.70 (17) | O1C—K2—K1i | 79.67 (13) |
O1A—Fe—K1 | 106.50 (18) | F4Di—K2—K1i | 47.01 (15) |
K2—Fe—K1 | 73.86 (5) | F3Bii—K2—K1i | 108.57 (13) |
O1B—Fe—K1i | 44.28 (19) | F5Bii—K2—K1i | 153.69 (15) |
O1D—Fe—K1i | 152.21 (19) | F5C—K2—K1i | 107.12 (14) |
O1C—Fe—K1i | 106.55 (17) | F6A—K2—K1i | 70.74 (13) |
O1A—Fe—K1i | 49.86 (18) | F6Ciii—K2—K1i | 131.40 (15) |
K2—Fe—K1i | 74.57 (5) | F1Di—K2—K1i | 43.05 (12) |
K1—Fe—K1i | 148.42 (4) | Fe—K2—K1i | 54.61 (4) |
O1D—K1—O1Bii | 112.7 (2) | K1—K2—K1i | 109.57 (4) |
O1D—K1—F1Aii | 164.9 (2) | C1A—O1A—Fe | 121.7 (5) |
O1Bii—K1—F1Aii | 81.9 (2) | C1A—O1A—K2 | 123.6 (5) |
O1D—K1—O1Aii | 122.10 (19) | Fe—O1A—K2 | 95.6 (2) |
O1Bii—K1—O1Aii | 63.20 (18) | C1A—O1A—K1i | 110.2 (5) |
F1Aii—K1—O1Aii | 60.00 (17) | Fe—O1A—K1i | 97.0 (2) |
O1D—K1—F1C | 83.88 (19) | K2—O1A—K1i | 104.6 (2) |
O1Bii—K1—F1C | 163.0 (2) | O1A—C1A—C2A | 112.0 (7) |
F1Aii—K1—F1C | 81.81 (19) | O1A—C1A—C3A | 107.5 (7) |
O1Aii—K1—F1C | 112.00 (19) | C2A—C1A—C3A | 112.4 (8) |
O1D—K1—O1C | 63.35 (18) | O1A—C1A—H1AA | 108.3 |
O1Bii—K1—O1C | 123.56 (19) | C2A—C1A—H1AA | 108.3 |
F1Aii—K1—O1C | 112.51 (17) | C3A—C1A—H1AA | 108.3 |
O1Aii—K1—O1C | 170.39 (18) | F3A—C2A—F2A | 106.5 (8) |
F1C—K1—O1C | 59.39 (18) | F3A—C2A—F1A | 106.7 (8) |
O1D—K1—F1D | 57.24 (18) | F2A—C2A—F1A | 106.3 (7) |
O1Bii—K1—F1D | 118.1 (2) | F3A—C2A—C1A | 110.7 (8) |
F1Aii—K1—F1D | 113.43 (19) | F2A—C2A—C1A | 113.2 (8) |
O1Aii—K1—F1D | 74.11 (18) | F1A—C2A—C1A | 113.1 (8) |
F1C—K1—F1D | 73.39 (18) | F4A—C3A—F6A | 106.6 (9) |
O1C—K1—F1D | 105.59 (19) | F4A—C3A—F5A | 107.1 (8) |
O1D—K1—F5Bii | 115.9 (2) | F6A—C3A—F5A | 106.6 (8) |
O1Bii—K1—F5Bii | 57.84 (19) | F4A—C3A—C1A | 112.7 (8) |
F1Aii—K1—F5Bii | 74.45 (19) | F6A—C3A—C1A | 110.3 (8) |
O1Aii—K1—F5Bii | 108.25 (19) | F5A—C3A—C1A | 113.0 (8) |
F1C—K1—F5Bii | 112.55 (18) | C2A—F1A—K1i | 116.1 (5) |
O1C—K1—F5Bii | 73.54 (18) | C3A—F4A—K1i | 115.7 (6) |
F1D—K1—F5Bii | 171.23 (18) | C3A—F6A—K2 | 114.3 (5) |
O1D—K1—F4Aii | 112.61 (19) | C1B—O1B—Fe | 132.1 (6) |
O1Bii—K1—F4Aii | 116.48 (19) | C1B—O1B—K1i | 121.3 (5) |
F1Aii—K1—F4Aii | 54.69 (19) | Fe—O1B—K1i | 105.4 (3) |
O1Aii—K1—F4Aii | 55.65 (17) | O1B—C1B—C3B | 110.0 (7) |
F1C—K1—F4Aii | 56.36 (17) | O1B—C1B—C2B | 108.3 (7) |
O1C—K1—F4Aii | 115.57 (18) | C3B—C1B—C2B | 109.3 (8) |
F1D—K1—F4Aii | 60.14 (17) | O1B—C1B—H1BA | 109.7 |
F5Bii—K1—F4Aii | 128.35 (19) | C3B—C1B—H1BA | 109.7 |
O1D—K1—F4C | 116.14 (18) | C2B—C1B—H1BA | 109.7 |
O1Bii—K1—F4C | 112.7 (2) | F2B—C2B—F1B | 107.9 (9) |
F1Aii—K1—F4C | 57.82 (16) | F2B—C2B—F3B | 106.6 (9) |
O1Aii—K1—F4C | 117.47 (17) | F1B—C2B—F3B | 105.5 (8) |
F1C—K1—F4C | 53.42 (18) | F2B—C2B—C1B | 113.9 (8) |
O1C—K1—F4C | 54.68 (16) | F1B—C2B—C1B | 110.3 (8) |
F1D—K1—F4C | 126.43 (19) | F3B—C2B—C1B | 112.1 (8) |
F5Bii—K1—F4C | 60.50 (18) | F6B—C3B—F4B | 107.3 (8) |
F4Aii—K1—F4C | 83.19 (19) | F6B—C3B—F5B | 106.3 (9) |
O1D—K1—F3Bii | 71.22 (18) | F4B—C3B—F5B | 106.5 (9) |
O1Bii—K1—F3Bii | 54.89 (18) | F6B—C3B—C1B | 110.3 (9) |
F1Aii—K1—F3Bii | 122.69 (19) | F4B—C3B—C1B | 114.2 (9) |
O1Aii—K1—F3Bii | 115.15 (17) | F5B—C3B—C1B | 111.8 (8) |
F1C—K1—F3Bii | 132.85 (19) | C2B—F3B—K2i | 122.8 (6) |
O1C—K1—F3Bii | 73.62 (18) | C2B—F3B—K1i | 114.0 (6) |
F1D—K1—F3Bii | 119.30 (17) | K2i—F3B—K1i | 92.40 (19) |
F5Bii—K1—F3Bii | 51.94 (17) | C3B—F5B—K2i | 126.5 (6) |
F4Aii—K1—F3Bii | 170.79 (18) | C3B—F5B—K1i | 112.8 (6) |
F4C—K1—F3Bii | 102.85 (19) | K2i—F5B—K1i | 92.91 (19) |
O1D—K1—F4D | 55.11 (18) | C1C—O1C—Fe | 122.8 (5) |
O1Bii—K1—F4D | 72.43 (19) | C1C—O1C—K2 | 124.2 (5) |
F1Aii—K1—F4D | 130.92 (18) | Fe—O1C—K2 | 95.3 (2) |
O1Aii—K1—F4D | 71.10 (18) | C1C—O1C—K1 | 111.1 (5) |
F1C—K1—F4D | 122.75 (18) | Fe—O1C—K1 | 96.1 (2) |
O1C—K1—F4D | 116.56 (17) | K2—O1C—K1 | 102.4 (2) |
F1D—K1—F4D | 51.80 (18) | O1C—C1C—C2C | 111.8 (7) |
F5Bii—K1—F4D | 120.40 (19) | O1C—C1C—C3C | 107.6 (7) |
F4Aii—K1—F4D | 101.14 (19) | C2C—C1C—C3C | 111.9 (7) |
F4C—K1—F4D | 171.16 (18) | O1C—C1C—H1CA | 108.5 |
F3Bii—K1—F4D | 73.87 (18) | C2C—C1C—H1CA | 108.5 |
O1A—K2—O1C | 70.43 (17) | C3C—C1C—H1CA | 108.5 |
O1A—K2—F4Di | 80.6 (2) | F3C—C2C—F1C | 107.1 (8) |
O1C—K2—F4Di | 69.08 (19) | F3C—C2C—F2C | 106.3 (7) |
O1A—K2—F3Bii | 69.64 (18) | F1C—C2C—F2C | 105.8 (7) |
O1C—K2—F3Bii | 80.8 (2) | F3C—C2C—C1C | 114.5 (7) |
F4Di—K2—F3Bii | 143.3 (2) | F1C—C2C—C1C | 112.9 (8) |
O1A—K2—F5Bii | 119.22 (19) | F2C—C2C—C1C | 109.8 (7) |
O1C—K2—F5Bii | 77.4 (2) | F4C—C3C—F5C | 107.0 (8) |
F4Di—K2—F5Bii | 132.1 (2) | F4C—C3C—F6C | 106.9 (8) |
F3Bii—K2—F5Bii | 55.06 (17) | F5C—C3C—F6C | 106.5 (7) |
O1A—K2—F5C | 122.54 (18) | F4C—C3C—C1C | 113.0 (7) |
O1C—K2—F5C | 55.93 (17) | F5C—C3C—C1C | 109.9 (7) |
F4Di—K2—F5C | 63.32 (19) | F6C—C3C—C1C | 113.2 (8) |
F3Bii—K2—F5C | 115.89 (19) | C2C—F1C—K1 | 116.7 (5) |
F5Bii—K2—F5C | 69.82 (18) | C3C—F4C—K1 | 115.3 (5) |
O1A—K2—F6A | 56.03 (17) | C3C—F5C—K2 | 114.6 (5) |
O1C—K2—F6A | 123.39 (17) | C3C—F6C—K2iv | 149.4 (6) |
F4Di—K2—F6A | 114.6 (2) | C1D—O1D—Fe | 130.7 (6) |
F3Bii—K2—F6A | 65.49 (19) | C1D—O1D—K1 | 121.9 (5) |
F5Bii—K2—F6A | 112.2 (2) | Fe—O1D—K1 | 105.8 (2) |
F5C—K2—F6A | 177.8 (2) | O1D—C1D—C2D | 109.6 (8) |
O1A—K2—F6Ciii | 170.4 (2) | O1D—C1D—C3D | 109.1 (7) |
O1C—K2—F6Ciii | 111.62 (18) | C2D—C1D—C3D | 110.9 (8) |
F4Di—K2—F6Ciii | 91.4 (2) | O1D—C1D—H1DA | 109.1 |
F3Bii—K2—F6Ciii | 119.7 (2) | C2D—C1D—H1DA | 109.1 |
F5Bii—K2—F6Ciii | 70.11 (19) | C3D—C1D—H1DA | 109.1 |
F5C—K2—F6Ciii | 56.78 (16) | F6D—C2D—F5D | 108.1 (8) |
F6A—K2—F6Ciii | 124.30 (18) | F6D—C2D—F4D | 106.2 (8) |
O1A—K2—F1Di | 75.14 (17) | F5D—C2D—F4D | 106.5 (9) |
O1C—K2—F1Di | 117.56 (18) | F6D—C2D—C1D | 111.1 (9) |
F4Di—K2—F1Di | 54.91 (17) | F5D—C2D—C1D | 113.4 (9) |
F3Bii—K2—F1Di | 131.32 (18) | F4D—C2D—C1D | 111.1 (7) |
F5Bii—K2—F1Di | 163.23 (19) | F2D—C3D—F3D | 107.8 (9) |
F5C—K2—F1Di | 111.10 (18) | F2D—C3D—F1D | 106.4 (8) |
F6A—K2—F1Di | 67.20 (18) | F3D—C3D—F1D | 106.5 (8) |
F6Ciii—K2—F1Di | 96.01 (18) | F2D—C3D—C1D | 114.3 (8) |
O1A—K2—Fe | 35.22 (13) | F3D—C3D—C1D | 110.1 (8) |
O1C—K2—Fe | 35.22 (12) | F1D—C3D—C1D | 111.4 (8) |
F4Di—K2—Fe | 71.94 (15) | C3D—F1D—K1 | 115.1 (6) |
F3Bii—K2—Fe | 71.37 (14) | C3D—F1D—K2ii | 121.0 (6) |
F5Bii—K2—Fe | 99.10 (15) | K1—F1D—K2ii | 92.36 (18) |
F5C—K2—Fe | 89.38 (11) | C2D—F4D—K2ii | 130.0 (6) |
F6A—K2—Fe | 89.56 (12) | C2D—F4D—K1 | 110.6 (5) |
F6Ciii—K2—Fe | 146.14 (14) | K2ii—F4D—K1 | 93.5 (2) |
Fe—O1A—C1A—C2A | 58.2 (9) | K1—O1C—C1C—C2C | −52.8 (8) |
K2—O1A—C1A—C2A | −178.7 (5) | Fe—O1C—C1C—C3C | −177.0 (5) |
K1i—O1A—C1A—C2A | −54.1 (8) | K2—O1C—C1C—C3C | −52.3 (8) |
Fe—O1A—C1A—C3A | −177.8 (6) | K1—O1C—C1C—C3C | 70.5 (7) |
K2—O1A—C1A—C3A | −54.7 (8) | O1C—C1C—C2C—F3C | −175.2 (7) |
K1i—O1A—C1A—C3A | 69.8 (7) | C3C—C1C—C2C—F3C | 64.0 (10) |
O1A—C1A—C2A—F3A | −57.5 (10) | O1C—C1C—C2C—F1C | 61.9 (10) |
C3A—C1A—C2A—F3A | −178.7 (8) | C3C—C1C—C2C—F1C | −58.9 (10) |
O1A—C1A—C2A—F2A | −177.0 (7) | O1C—C1C—C2C—F2C | −55.9 (10) |
C3A—C1A—C2A—F2A | 61.8 (10) | C3C—C1C—C2C—F2C | −176.7 (7) |
O1A—C1A—C2A—F1A | 62.1 (10) | O1C—C1C—C3C—F4C | −60.8 (10) |
C3A—C1A—C2A—F1A | −59.1 (11) | C2C—C1C—C3C—F4C | 62.4 (10) |
O1A—C1A—C3A—F4A | −60.4 (10) | O1C—C1C—C3C—F5C | 58.6 (9) |
C2A—C1A—C3A—F4A | 63.3 (10) | C2C—C1C—C3C—F5C | −178.2 (8) |
O1A—C1A—C3A—F6A | 58.6 (10) | O1C—C1C—C3C—F6C | 177.5 (8) |
C2A—C1A—C3A—F6A | −177.7 (8) | C2C—C1C—C3C—F6C | −59.3 (10) |
O1A—C1A—C3A—F5A | 177.9 (8) | F3C—C2C—F1C—K1 | −162.6 (5) |
C2A—C1A—C3A—F5A | −58.4 (11) | F2C—C2C—F1C—K1 | 84.4 (7) |
F3A—C2A—F1A—K1i | 87.7 (7) | C1C—C2C—F1C—K1 | −35.7 (8) |
F2A—C2A—F1A—K1i | −159.0 (5) | F5C—C3C—F4C—K1 | −100.1 (6) |
C1A—C2A—F1A—K1i | −34.2 (10) | F6C—C3C—F4C—K1 | 146.1 (5) |
F6A—C3A—F4A—K1i | −100.7 (7) | C1C—C3C—F4C—K1 | 20.9 (9) |
F5A—C3A—F4A—K1i | 145.5 (6) | F4C—C3C—F5C—K2 | 82.7 (7) |
C1A—C3A—F4A—K1i | 20.5 (9) | F6C—C3C—F5C—K2 | −163.3 (5) |
F4A—C3A—F6A—K2 | 84.6 (8) | C1C—C3C—F5C—K2 | −40.3 (9) |
F5A—C3A—F6A—K2 | −161.2 (6) | F4C—C3C—F6C—K2iv | 50.4 (15) |
C1A—C3A—F6A—K2 | −38.1 (9) | F5C—C3C—F6C—K2iv | −63.7 (14) |
Fe—O1B—C1B—C3B | −111.6 (8) | C1C—C3C—F6C—K2iv | 175.4 (8) |
K1i—O1B—C1B—C3B | 54.1 (9) | Fe—O1D—C1D—C2D | 130.2 (7) |
Fe—O1B—C1B—C2B | 129.0 (7) | K1—O1D—C1D—C2D | −66.0 (9) |
K1i—O1B—C1B—C2B | −65.4 (8) | Fe—O1D—C1D—C3D | −108.2 (8) |
O1B—C1B—C2B—F2B | 173.4 (8) | K1—O1D—C1D—C3D | 55.6 (9) |
C3B—C1B—C2B—F2B | 53.6 (11) | O1D—C1D—C2D—F6D | −59.5 (10) |
O1B—C1B—C2B—F1B | −65.1 (10) | C3D—C1D—C2D—F6D | 179.9 (7) |
C3B—C1B—C2B—F1B | 175.1 (8) | O1D—C1D—C2D—F5D | 178.5 (8) |
O1B—C1B—C2B—F3B | 52.2 (10) | C3D—C1D—C2D—F5D | 58.0 (11) |
C3B—C1B—C2B—F3B | −67.6 (10) | O1D—C1D—C2D—F4D | 58.5 (10) |
O1B—C1B—C3B—F6B | 60.7 (10) | C3D—C1D—C2D—F4D | −62.0 (10) |
C2B—C1B—C3B—F6B | 179.4 (9) | O1D—C1D—C3D—F2D | −174.5 (9) |
O1B—C1B—C3B—F4B | −178.5 (8) | C2D—C1D—C3D—F2D | −53.7 (11) |
C2B—C1B—C3B—F4B | −59.7 (11) | O1D—C1D—C3D—F3D | 64.0 (10) |
O1B—C1B—C3B—F5B | −57.4 (11) | C2D—C1D—C3D—F3D | −175.2 (7) |
C2B—C1B—C3B—F5B | 61.4 (11) | O1D—C1D—C3D—F1D | −53.9 (10) |
F2B—C2B—F3B—K2i | −36.4 (10) | C2D—C1D—C3D—F1D | 66.9 (10) |
F1B—C2B—F3B—K2i | −151.0 (5) | F2D—C3D—F1D—K1 | 154.9 (6) |
C1B—C2B—F3B—K2i | 88.9 (8) | F3D—C3D—F1D—K1 | −90.3 (8) |
F2B—C2B—F3B—K1i | −146.4 (6) | C1D—C3D—F1D—K1 | 29.8 (9) |
F1B—C2B—F3B—K1i | 99.1 (7) | F2D—C3D—F1D—K2ii | 45.4 (10) |
C1B—C2B—F3B—K1i | −21.1 (9) | F3D—C3D—F1D—K2ii | 160.2 (5) |
F6B—C3B—F5B—K2i | 161.5 (6) | C1D—C3D—F1D—K2ii | −79.8 (8) |
F4B—C3B—F5B—K2i | 47.3 (10) | F6D—C2D—F4D—K2ii | −153.1 (5) |
C1B—C3B—F5B—K2i | −78.1 (9) | F5D—C2D—F4D—K2ii | −38.1 (11) |
F6B—C3B—F5B—K1i | −86.2 (8) | C1D—C2D—F4D—K2ii | 85.9 (9) |
F4B—C3B—F5B—K1i | 159.6 (6) | F6D—C2D—F4D—K1 | 93.2 (7) |
C1B—C3B—F5B—K1i | 34.2 (9) | F5D—C2D—F4D—K1 | −151.8 (6) |
Fe—O1C—C1C—C2C | 59.7 (9) | C1D—C2D—F4D—K1 | −27.8 (9) |
K2—O1C—C1C—C2C | −175.5 (5) |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) −x+1, y+1/2, −z+1/2; (iii) x+1/2, −y+1/2, −z; (iv) x−1/2, −y+1/2, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
C1A—H1AA···F3Bii | 1.00 | 2.54 | 3.236 (10) | 126 |
C1B—H1BA···F2C | 1.00 | 2.56 | 3.199 (11) | 122 |
C1C—H1CA···F4Di | 1.00 | 2.56 | 3.201 (11) | 122 |
C1D—H1DA···F2Av | 1.00 | 2.46 | 3.361 (11) | 150 |
C1D—H1DA···F3A | 1.00 | 2.42 | 3.093 (11) | 124 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) −x+1, y+1/2, −z+1/2; (v) x−1/2, −y+1/2, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C1A—H1AA···F3Bi | 1.00 | 2.54 | 3.236 (10) | 126.4 |
C1B—H1BA···F2C | 1.00 | 2.56 | 3.199 (11) | 121.9 |
C1C—H1CA···F4Dii | 1.00 | 2.56 | 3.201 (11) | 121.8 |
C1D—H1DA···F2Aiii | 1.00 | 2.46 | 3.361 (11) | 149.5 |
C1D—H1DA···F3A | 1.00 | 2.42 | 3.093 (11) | 123.8 |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) −x+1, y−1/2, −z+1/2; (iii) x−1/2, −y+1/2, −z+1. |
Acknowledgements
We thank the Office of Naval Research for financial support. RJB wishes to acknowledge the NSF–MRI program (grant CHE-0619278) for funds to purchase the diffractometer.
References
Agilent (2012). CrysAlis PRO. Agilent Technologies, Yarnton, UK. Google Scholar
Bernhardt, E., Brauer, D. J., Köckerling, M. & Pawelke, G. (2007). Z. Anorg. Allg. Chem. 633, 947–954. Web of Science CSD CrossRef CAS Google Scholar
Cantalupo, S. A., Fiedler, S. R., Shores, M. P., Rheingold, A. L. & Doerrer, L. H. (2012). Angew. Chem. Int. Ed. 51, 1000–1005. Web of Science CSD CrossRef CAS Google Scholar
Cantalupo, S. A., Lum, J. S., Buzzeo, M. C., Moore, C., DiPasquale, A. G., Rheingold, A. L. & Doerrer, L. H. (2010). Dalton Trans. 39, 374–383. Web of Science CSD CrossRef CAS Google Scholar
Konefal, E., Loeb, S. J., Willis, C. J. & Stephan, D. W. (1986). Inorg. Chim. Acta, 115, 147–151. CSD CrossRef CAS Web of Science Google Scholar
Purdy, A. P. & George, C. F. (1991). Inorg. Chem. 30, 1970–1972. Google Scholar
Purdy, A. P. & George, C. F. (1994). ACS Symposium Series, Vol. 555, Inorganic Fluorine Chemistry, edited by Joseph S . Thrasher & Steven H. Strauss, ch. 26, pp. 405–420, . Washington, DC: American Chemical Society. Google Scholar
Purdy, A. P., George, C. F. & Callahan, J. H. (1991). Inorg. Chem. 30, 2812–2819. CSD CrossRef CAS Web of Science Google Scholar
Samuels, J. A., Lobkovsky, E. B., Streib, W. E., Folting, K., Huffman, J. C., Zwanziger, J. W. & Caulton, K. G. (1993). J. Am. Chem. Soc. 115, 5093–5104. CSD CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Yamashita, M. Y., Yamamoto, Y., Akiba, K., Hashizume, D., Iwasaki, F., Takagi, N. & Nagase, S. (2005). J. Am. Chem. Soc. 127, 4354–4371. Web of Science CSD CrossRef PubMed CAS Google Scholar
Zheng, B., Miranda, M. O., DiPasquale, A. G., Golen, J. A., Rheingold, A. L. & Doerrer, L. H. (2009). Inorg. Chem. 48, 4274–4276. Web of Science CSD CrossRef PubMed CAS Google Scholar
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The iron atoms have a highly distorted tetrahedral coordination by the four O atoms of the hexafluoroisopropoxide ligands, with the O—Fe—O angles ranging from 93.9 (2) to 143.1 (2) °. The two longest Fe—O bonds (2.047 (6) and 2.048 (6) Å) are to the O atoms O1A and O1C, which are also bridged to both K1 and K2. The shorter Fe—O bonds (1.948 (6) and 1.950 (6) Å) are to O1B and O1D, which are bridged only to K1 atoms. While the metal atoms are linked in a zigzag chain along b by coordination to these O atoms, coordination of the fluorine atoms to the potassium atoms completes the potassium coordination spheres. K2 is 9-coordinate and is linked to O1A and O1C (2.689 (6) and 2.698 (7) Å), and 7 fluorine atoms on the HFIP groups, with K—F contacts ranging from 2.798 (8) to 3.088 (7) Å. One fluorine atom, F6C, links K2 to a symmetry equivalent chain. K1 is 12-coordinate with two short K—O bonds of 2.674 (6) and 2.692 (7) Å and two longer K—O bonds of 2.891 (6) and 2.863 (7). The eight K—F contacts range from 2.861 (6) to 3.221 (7) Å. Close contacts between alkali or alkaline earth cations and the fluorine atoms of a fluoroalkoxy ligand are very common and occur in many compounds that have been structurally characterized. Some examples include Na2Cu(OCH(CF3)2)4 (Purdy, et al. 1991), BaCu(OCH(CF3)2)4(THF)4 (Purdy and George, 1994), (18-Crown-6)-(1,1-bis(trifluoromethyl)-1H-anthra(1,9-bc)furan-10-olato-F, O)-potassium (Yamashita, et al., 2005), and some potassium perfluoroalkoxyborates (Bernhardt, et al., 2007). The nature of the bonding between fluorines on fluoroalkoxy groups and electropositive metal ions was explained by a combination of orbital overlap and electrostatics (Samuels et al., 1993). Weak C—H···F hydrogen bonding is also present with all the hexafluoroisopropoxy protons.