Crystal structure of tetra­kis­(1,1,1,5,5,5-hexa­fluoro­acetyl­acetonato)hafnium(IV)

Schwandt, W.F.; Woods, T.J.; Girolami, G.S.

doi:10.1107/S2056989018010514

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Volume 74| Part 8| August 2018| Pages 1182-1185

https://doi.org/10.1107/S2056989018010514

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Crystal structure of tetrakis(1,1,1,5,5,5-hexafluoroacetylacetonato)hafnium(IV)

W. Franklin Schwandt,^a Toby J. Woods ^b and Gregory S. Girolami ^a ^*

^aSchool of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA, and ^bGeorge L. Clark X-Ray Facility and 3M Materials Laboratory, University of Illinois at Urbana-Champaign, 505 South Mathews Avenue, Urbana, IL 61801, USA
^*Correspondence e-mail: ggirolam@illinois.edu

Edited by J. Simpson, University of Otago, New Zealand (Received 11 July 2018; accepted 21 July 2018; online 31 July 2018)

The crystal structure of the title compound, [Hf(C₅HF₆O₂)₄], has been determined. The asymmetric unit contains two Hf(hfac)₄ molecules (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate); both are located on general positions and have identical structures apart from the disorder involving three CF₃ groups in one of the two molecules. The molecules of Hf(hfac)₄ are arranged in layers that are parallel to the ab plane, and the coordination geometry of each hafnium(IV) center is a distorted square antiprism. An interesting aspect of the structure is that the hfac ligands are arranged so that the Hf(hfac)₄ molecules have idealized 2 point symmetry, in which two of the hfac groups bridge between the two squares. Although all other M(β-diketonate)₄ compounds of Hf (and Zr) also have square-antiprismatic geometries; in almost all of them the ligands are arranged so that the molecules have 222 point symmetry (in which none of the hfac ligands bridges between the two squares). The factors that favor one structure over another are not clear.

Keywords: crystal structure; hafnium; hexafluoroacetylacetonate.

CCDC reference: 1857253

1. Chemical context

The molecule tetrakis(1,1,1,5,5,5-hexafluoroacetylacetonato)hafnium(IV), Hf(hfac)₄, has a relatively high vapor pressure for a hafnium compound, and in part for this reason it has been identified as a potential chemical vapor deposition (CVD) precursor for thin films of hafnium dioxide (Balog et al., 1977 ; Morozova et al., 2008 ; Wilk et al., 2001 ; Zherikova & Morozova, 2012 ; Zherikova et al., 2008 ).

Thin films of HfO₂ are widely used as the gate oxide in integrated circuits because of its high dielectric constant. Although most CVD precursors for HfO₂, such as the dialkylamide Hf(NMe₂)₄, have molecular weights less than 500, it has recently been discovered that higher molecular weight precursors can enable superconformal growth in high aspect ratio features (i.e., faster growth deeper in the feature), which is an important goal in the microelectronics industry (Wang et al., 2014 ). The molecular weight of Hf(hfac)₄ is quite high (1006.8), but it nevertheless is highly volatile owing to the fluorine substituents, which reduce the strength of intermolecular interactions (Jones et al., 2009 ). Here we report on the crystal structure of Hf(hfac)₄.

2. Structural commentary

There are two crystallographically inequivalent Hf(hfac)₄ molecules in the asymmetric unit (Fig. 1). The two molecules are structurally identical (r.m.s. deviation = 0.004 Å), except that three of the CF₃ substituents in the Hf1 molecule are disordered over two sites (Fig. 2). Each hafnium atom is bound to four bidentate hfac ligands; the eight oxygen atoms define a square antiprism in which two of the hfac ligands bridge between the squares, giving an idealized point symmetry of 2. The Hf—O bond lengths range from 2.134 (2) to 2.210 (3) Å, whereas the C—O bond lengths range from 1.247 (5) to 1.275 (5) Å. All of the distances are as expected except that the C—F bond distances vary over a larger range than usual owing to the disorder.

Figure 1
The asymmetric unit of Hf(hfac)₄ with displacement ellipsoids drawn at the 50% probability level. F10A–F12A, F16A–F18A and F22A–F24A are the minor components of the F atoms of the disordered CF₃ groups in the Hf1 molecule. Color coding: C – grey, O – red, H – white, F– green, Hf – blue.

Figure 2
Overlay of the crystallographically inequivalent Hf(hfac)₄ molecules with molecule 1 in orange, molecule 2 in blue, and the disordered CF₃ groups in green; r.m.s. deviation = 0.004 Å.

3. Supramolecular features

The molecules are well separated and the shortest Hf⋯Hf distance is 8.3610 (1) Å. The molecules form layers parallel to the ab plane (Figs. 3 and 4). Of the intermolecular C—H⋯F contacts (ignoring the minor site F atoms; Table 1), only three are comparable to the 2.60 Å sum of the van der Waals radii (1.2 Å for H, and 1.40 Å for F attached to a primary alkyl (Bondi, 1964 ): H8⋯F5 (2.50 Å), H13⋯F35 (2.65 Å), and H3⋯F24 (2.68 Å). Only one intermolecular F⋯F interaction (again ignoring the minor site F atoms) is shorter than 2.8 Å, the sum of van der Waals radii for two F atoms attached to a primary alkyl, that involving F2⋯F22 (2.76 Å). All these intermolecular contacts must be weak, given that the compound sublimes in moderate vacuum only slightly above room temperature.

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C3—H3⋯F23Aⁱ	0.95	2.57	3.374 (10)	143
C3—H3⋯F24ⁱ	0.95	2.68	3.375 (8)	130
C8—H8⋯F5ⁱⁱ	0.95	2.50	3.427 (5)	166
C33—H33⋯F11Aⁱⁱⁱ	0.95	2.49	3.292 (9)	142
C13—H13⋯F35ⁱⁱⁱ	0.95	2.65	3.528 (5)	154
Symmetry codes: (i) $[x, -y+{\script{1\over 2}}, z+{\script{1\over 2}}]$ ; (ii) -x+1, -y+1, -z+2; (iii) -x+1, -y+1, -z+1.

Figure 3
A single layer of Hf(hfac)₄ molecules as viewed along the c axis.

Figure 4
The layered structure of Hf(hfac)₄ as viewed along the a axis.

4. Database survey

A search of the Cambridge Structural Database (CSD) returned 21 structures of the form Hf(RCOCHCOR′)₄ and 21 of the form Zr(RCOCHCOR′)₄ (Groom et al., 2016 ). The R and R′ groups, which could either be the same or different, included Me, CF₃, ⁱPr, CH₂^tBu, ^tBu, thiofuranyl, CMe₂(OMe), OSiMe₃, OMe, OEt, O^tBu, Ph, and CH₂COO^tBu. In all cases, the eight oxygen atoms describe a square antiprism about the metal center. This is the geometry expected for M(bidentate)₄ molecules in which the bidentate ligand has a large bite angle (Kepert, 1982 ).

Interestingly, of the 42 structures in the CSD, three different arrangements of the ligands have been seen, corresponding to the three idealized molecular point symmetries possible for a square-antiprismatic coordination geometry with four bidentate ligands (Fig. 5) (Marchi et al., 1943 ; Hoard & Silverton, 1963 ; Muetterties & Wright, 1967 ). The majority of them describe molecules with idealized 222 symmetry (in which none of the ligands bridge between the two squares), two describe molecules with idealized point symmetries of 2 (in which two of the ligands bridge between the two squares), and one describes a molecule with idealized 422 symmetry (in which all four ligands bridge between the two squares; in all cases, these point symmetries describe the arrangement of the ligands, and neglect differences between the R and R′ groups, if any).

Figure 5
The three different isomers of square antiprismatic tetrakis(bidentate) metal complexes. Point symmetries: (a) 2, (b) 222, (c) 422.

The current molecule Hf(hfac)₄ adds to the small number of group 4 M(RCOCHCOR′)₄ complexes that adopt the structure with an idealized point symmetry of 2; interestingly, one of the others is the zirconium analog Zr(hfac)₄ (Calderazzo et al., 1998 ). There is no obvious reason why Hf(hfac)₄ and Zr(hfac)₄ adopt this geometry rather than one of the other two. Irrespective of the structure adopted, the Hf—O and Zr—O bond distances in all Zr and Hf β-diketonates are all near 2.2 Å.

The NMR data for Hf(hfac)₄ show that all four C—H groups and all eight CF₃ groups are chemically equivalent on the NMR time scale at room temperature, so that there must be a dynamic process that interconverts the different hfac environments.

5. Synthesis and crystallization

To a mixture of sodium 1,1,1,5,5,5-hexafluoroacetylacetonate (Harada & Girolami, 2007 ) (1.46 g, 6.36 mmol) and hafnium tetrachloride (0.51 g, 1.59 mmol) at 195 K was added diethyl ether (10 mL). The mixture was warmed to room temperature and allowed to stir overnight. The solution was filtered, and the filtrate was taken to dryness under vacuum. The colorless product Hf(hfac)₄ was sublimed out of the brown residue at 15 mTorr and 303 K onto a water-cooled cold finger. Yield: 0.44 g (28%). ¹H NMR (400 MHz, C₆D₆): δ 6.12 (s). ¹⁹F NMR (400 MHz, C₆D₆): δ −77.01 (s). The NMR spectra are similar to those previously reported for this compound in CCl₄ (¹H NMR: δ 6.54; ¹⁹F NMR: δ −74.7); note that this previous work used the opposite chemical shift sign convention and a different ¹⁹F NMR shift reference (Chattoraj et al., 1968 ).

X-ray quality crystals were grown by allowing Hf(hfac)₄ (0.1 g) to sublime inside an evacuated 50 mL Schlenk tube placed on top of a warm oven. After 12 h, crystals had formed on the cooler parts of the tube.

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2. H-atom positions were positioned geometrically and refined as riding: C—H = 0.95 Å with U_iso(H) = 1.2U_eq(C). The F10–F12, F16–F18, and F22–F24 atoms are disordered over two sites; their occupancies refine to 0.644 (18):0.356 (18), 0.507 (6):0.493 (6) and 0.61 (2):0.39 (2), respectively. Within each disordered CF₃ group, the C—F distances were restrained to 1.35±0.01 Å, and the F—C—F and C—C—F bond angles were limited to near-tetrahedral values by restraining the F⋯F and β-C⋯F distances to 2.15 (1) and 2.3 (5) Å, respectively. The displacement parameters for all F atoms were restrained to be approximately isotropic (ISOR 0.005). The ( $[\overline{1}]$ 11), (021), (011), (110), (113), (122), (111), (220), and ( $[\overline{1}]$ 21) reflections were obscured by the beam stop and were omitted from the final refinement. The largest electron density peak in the difference map (4.36 e Å⁻³) is located 0.85 Å from Hf2 and is certainly a Fourier truncation ripple.

Table 2
Experimental details

Crystal data
Chemical formula	[Hf(C₅HF₆O₂)₄]
M_r	1006.72
Crystal system, space group	Monoclinic, P2₁/c
Temperature (K)	100
a, b, c (Å)	15.3042 (3), 20.0723 (4), 19.4935 (4)
β (°)	96.158 (1)
V (Å³)	5953.7 (2)
Z	8
Radiation type	Mo Kα
μ (mm⁻¹)	3.70
Crystal size (mm)	0.23 × 0.22 × 0.19

Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 )
T_min, T_max	0.661, 0.746
No. of measured, independent and observed [I > 2σ(I)] reflections	211180, 14806, 12738
R_int	0.044
(sin θ/λ)_max (Å⁻¹)	0.668

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.031, 0.074, 1.10
No. of reflections	14806
No. of parameters	1039
No. of restraints	369
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	4.36, −1.89
Computer programs: APEX2 and SAINT (Bruker, 2014 ), SHELXT2014 (Sheldrick, 2015b ), SHELXL2014 (Sheldrick, 2015a ) and OLEX2 (Dolomanov et al., 2009 ).

Supporting information

CCDC reference: 1857253

Crystal structure: contains datablock I. DOI: https://doi.org/10.1107/S2056989018010514/sj5560sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989018010514/sj5560Isup2.hkl

checkCIF report

Computing details top

Data collection: APEX2 (Bruker, 2014); cell refinement: SAINT (Bruker, 2014); data reduction: SAINT (Bruker, 2014); program(s) used to solve structure: SHELXS2014 (Sheldrick, 2015b); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015a); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2 (Dolomanov et al., 2009).

Tetrakis(1,1,1,5,5,5-hexafluoroacetylacetonato)hafnium(IV) top

Crystal data top

[Hf(C₅HF₆O₂)₄]	F(000) = 3808
M_r = 1006.72	D_x = 2.246 Mg m⁻³
Monoclinic, P2₁/c	Mo Kα radiation, λ = 0.71073 Å
a = 15.3042 (3) Å	Cell parameters from 58639 reflections
b = 20.0723 (4) Å	θ = 2.3–28.2°
c = 19.4935 (4) Å	µ = 3.70 mm⁻¹
β = 96.158 (1)°	T = 100 K
V = 5953.7 (2) Å³	Prism, colourless
Z = 8	0.23 × 0.22 × 0.19 mm

Data collection top

Bruker APEXII CCD diffractometer	12738 reflections with I > 2σ(I)
φ and ω scans	R_int = 0.044
Absorption correction: multi-scan (SADABS; Krause et al., 2015)	θ_max = 28.3°, θ_min = 1.3°
T_min = 0.661, T_max = 0.746	h = −20→20
211180 measured reflections	k = −26→26
14806 independent reflections	l = −26→26

Refinement top

Refinement on F²	369 restraints
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.031	H-atom parameters constrained
wR(F²) = 0.074	w = 1/[σ²(F_o²) + (0.0259P)² + 18.914P] where P = (F_o² + 2F_c²)/3
S = 1.10	(Δ/σ)_max = 0.003
14806 reflections	Δρ_max = 4.36 e Å⁻³
1039 parameters	Δρ_min = −1.89 e Å⁻³

Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq	Occ. (<1)
Hf1	0.54873 (2)	0.38630 (2)	0.77866 (2)	0.01927 (4)
O1	0.53844 (16)	0.28122 (12)	0.80247 (12)	0.0205 (5)
O2	0.62501 (17)	0.38168 (13)	0.87740 (13)	0.0241 (5)
C1	0.5399 (3)	0.1738 (2)	0.8474 (2)	0.0350 (9)
F1	0.45392 (19)	0.16898 (15)	0.8499 (2)	0.0679 (10)
F2	0.57856 (17)	0.13531 (12)	0.89695 (13)	0.0370 (6)
F3	0.5599 (3)	0.14822 (14)	0.78807 (15)	0.0677 (10)
C2	0.5686 (2)	0.24662 (19)	0.85349 (19)	0.0236 (7)
C3	0.6221 (2)	0.2677 (2)	0.91177 (19)	0.0250 (7)
H3	0.6416	0.2367	0.9470	0.030*
C4	0.6470 (2)	0.33396 (19)	0.91818 (18)	0.0228 (7)
C5	0.7101 (3)	0.3559 (2)	0.9803 (2)	0.0282 (8)
F4	0.72420 (19)	0.30906 (16)	1.02815 (13)	0.0514 (7)
F5	0.6798 (2)	0.40941 (17)	1.00909 (15)	0.0596 (9)
F6	0.78750 (16)	0.37207 (15)	0.96098 (13)	0.0419 (6)
O3	0.44467 (16)	0.37390 (13)	0.84384 (13)	0.0233 (5)
O4	0.54190 (16)	0.48451 (13)	0.82534 (13)	0.0231 (5)
C6	0.3275 (3)	0.3795 (2)	0.9110 (2)	0.0315 (9)
F7	0.34891 (17)	0.31919 (13)	0.93486 (15)	0.0447 (7)
F8	0.26091 (15)	0.37342 (14)	0.86177 (14)	0.0428 (6)
F9	0.29883 (17)	0.41418 (14)	0.96194 (14)	0.0441 (6)
C7	0.4053 (2)	0.41242 (19)	0.88110 (18)	0.0229 (7)
C8	0.4239 (3)	0.4783 (2)	0.8948 (2)	0.0301 (8)
H8	0.3900	0.5027	0.9242	0.036*
C9	0.4925 (2)	0.50954 (19)	0.86582 (19)	0.0244 (7)
C10	0.5104 (3)	0.5827 (2)	0.8848 (2)	0.0337 (9)
F10	0.5280 (9)	0.5913 (5)	0.9485 (4)	0.075 (3)	0.644 (18)
F11	0.4377 (3)	0.6185 (3)	0.8640 (4)	0.0410 (16)	0.644 (18)
F12	0.5689 (5)	0.6093 (3)	0.8483 (6)	0.061 (2)	0.644 (18)
F10A	0.4662 (13)	0.6251 (7)	0.8458 (7)	0.082 (5)	0.356 (18)
F11A	0.5975 (6)	0.5965 (7)	0.8883 (10)	0.066 (4)	0.356 (18)
F12A	0.4944 (9)	0.5948 (8)	0.9513 (5)	0.042 (3)	0.356 (18)
O5	0.60640 (16)	0.45575 (13)	0.71347 (13)	0.0240 (5)
O6	0.67729 (16)	0.34269 (13)	0.76348 (14)	0.0258 (5)
C11	0.6729 (3)	0.5152 (2)	0.6296 (2)	0.0324 (9)
F13	0.69778 (19)	0.56731 (13)	0.66855 (14)	0.0458 (7)
F14	0.59588 (18)	0.52931 (14)	0.59612 (14)	0.0461 (7)
F15	0.7301 (2)	0.50791 (15)	0.58351 (16)	0.0560 (8)
C12	0.6679 (2)	0.4527 (2)	0.67444 (19)	0.0270 (8)
C13	0.7281 (3)	0.4021 (2)	0.6715 (2)	0.0347 (9)
H13	0.7680	0.4024	0.6374	0.042*
C14	0.7295 (2)	0.3506 (2)	0.7193 (2)	0.0297 (8)
C15	0.8009 (3)	0.2969 (3)	0.7202 (3)	0.0502 (13)
F16	0.8107 (7)	0.2602 (5)	0.7724 (5)	0.076 (4)	0.507 (6)
F17	0.8811 (3)	0.3284 (3)	0.7178 (3)	0.0359 (14)	0.507 (6)
F18	0.7919 (5)	0.2634 (5)	0.6628 (5)	0.075 (3)	0.507 (6)
F16A	0.8637 (7)	0.3108 (6)	0.6835 (7)	0.134 (5)	0.493 (6)
F17A	0.7623 (6)	0.2390 (4)	0.6979 (6)	0.096 (4)	0.493 (6)
F18A	0.8322 (7)	0.2835 (5)	0.7855 (4)	0.082 (4)	0.507 (6)
O7	0.43069 (16)	0.43040 (13)	0.72452 (12)	0.0234 (5)
O8	0.52769 (17)	0.33355 (13)	0.68213 (13)	0.0244 (5)
C16	0.3184 (3)	0.4779 (2)	0.6483 (2)	0.0299 (8)
F19	0.24631 (16)	0.44484 (13)	0.66136 (16)	0.0458 (7)
F20	0.3066 (2)	0.49750 (15)	0.58295 (14)	0.0522 (8)
F21	0.32427 (18)	0.53092 (12)	0.68787 (14)	0.0432 (6)
C17	0.3988 (2)	0.43221 (19)	0.66260 (19)	0.0242 (7)
C18	0.4258 (2)	0.3952 (2)	0.6084 (2)	0.0263 (8)
H18	0.4022	0.4036	0.5621	0.032*
C19	0.4879 (2)	0.34600 (19)	0.62377 (19)	0.0242 (7)
C20	0.5124 (3)	0.3000 (2)	0.5672 (2)	0.0333 (9)
F22	0.4891 (8)	0.3242 (6)	0.5060 (5)	0.044 (2)	0.61 (2)
F23	0.4621 (7)	0.2422 (3)	0.5695 (4)	0.050 (2)	0.61 (2)
F24	0.5912 (5)	0.2793 (7)	0.5737 (4)	0.062 (3)	0.61 (2)
F22A	0.5122 (14)	0.2372 (4)	0.5819 (6)	0.069 (4)	0.39 (2)
F23A	0.5991 (5)	0.3159 (9)	0.5588 (6)	0.048 (3)	0.39 (2)
F24A	0.4703 (9)	0.3102 (9)	0.5044 (7)	0.036 (3)	0.39 (2)
Hf2	0.05011 (2)	0.34812 (2)	0.29307 (2)	0.02059 (4)
O9	0.03888 (16)	0.24362 (13)	0.31851 (13)	0.0254 (5)
O10	0.13316 (16)	0.34335 (13)	0.38817 (13)	0.0238 (5)
C21	0.0339 (3)	0.1385 (2)	0.3698 (2)	0.0317 (9)
F25	0.0415 (2)	0.10771 (14)	0.31083 (15)	0.0584 (8)
F26	−0.05068 (17)	0.14064 (13)	0.37891 (17)	0.0482 (7)
F27	0.0740 (2)	0.10128 (13)	0.42026 (15)	0.0495 (7)
C22	0.0703 (2)	0.20906 (19)	0.36922 (19)	0.0237 (7)
C23	0.1315 (2)	0.2302 (2)	0.42349 (19)	0.0263 (8)
H23	0.1542	0.1991	0.4576	0.032*
C24	0.1591 (2)	0.2953 (2)	0.42804 (18)	0.0235 (7)
C25	0.2278 (2)	0.3170 (2)	0.48612 (19)	0.0297 (8)
F28	0.19783 (18)	0.36545 (15)	0.52273 (14)	0.0467 (7)
F29	0.29945 (16)	0.33921 (15)	0.46019 (13)	0.0432 (6)
F30	0.25335 (17)	0.26747 (14)	0.52928 (12)	0.0413 (6)
O11	−0.05268 (16)	0.33560 (13)	0.35927 (13)	0.0259 (6)
O12	0.04500 (16)	0.44602 (13)	0.34183 (13)	0.0234 (5)
C26	−0.1791 (2)	0.3432 (2)	0.4163 (2)	0.0296 (8)
F31	−0.16297 (17)	0.28179 (14)	0.43867 (15)	0.0468 (7)
F32	−0.24156 (15)	0.33971 (13)	0.36372 (14)	0.0400 (6)
F33	−0.21122 (18)	0.37811 (15)	0.46555 (15)	0.0502 (7)
C27	−0.0975 (2)	0.3758 (2)	0.39135 (19)	0.0248 (8)
C28	−0.0814 (2)	0.4423 (2)	0.40295 (19)	0.0274 (8)
H28	−0.1194	0.4677	0.4282	0.033*
C29	−0.0091 (2)	0.4728 (2)	0.37765 (18)	0.0237 (7)
C30	0.0080 (3)	0.5464 (2)	0.3921 (2)	0.0319 (9)
F34	−0.0084 (3)	0.58166 (15)	0.33567 (16)	0.0698 (10)
F35	0.09035 (17)	0.55646 (14)	0.41741 (16)	0.0496 (7)
F36	−0.04077 (19)	0.57065 (14)	0.43865 (16)	0.0495 (7)
O13	0.10713 (16)	0.41745 (13)	0.22774 (13)	0.0243 (5)
O14	0.17452 (16)	0.30105 (13)	0.27081 (13)	0.0247 (5)
C31	0.1684 (3)	0.4764 (2)	0.1407 (2)	0.0332 (9)
F37	0.1948 (2)	0.52825 (14)	0.17918 (16)	0.0552 (8)
F38	0.09032 (19)	0.49093 (14)	0.10948 (15)	0.0511 (7)
F39	0.2232 (2)	0.46960 (16)	0.09337 (18)	0.0682 (10)
C32	0.1645 (2)	0.41349 (19)	0.18522 (19)	0.0249 (7)
C33	0.2210 (3)	0.3614 (2)	0.1775 (2)	0.0278 (8)
H33	0.2579	0.3615	0.1413	0.033*
C34	0.2231 (2)	0.30842 (19)	0.22395 (19)	0.0241 (7)
C35	0.2891 (3)	0.2518 (2)	0.2196 (2)	0.0319 (9)
F40	0.33034 (18)	0.23785 (15)	0.28025 (15)	0.0519 (7)
F41	0.3485 (2)	0.26543 (16)	0.17714 (18)	0.0621 (9)
F42	0.2483 (2)	0.19740 (14)	0.19608 (19)	0.0601 (9)
O15	−0.06754 (16)	0.39771 (14)	0.24297 (13)	0.0246 (5)
O16	0.01956 (16)	0.29709 (14)	0.19657 (13)	0.0254 (5)
C36	−0.1771 (3)	0.4516 (2)	0.1697 (2)	0.0324 (9)
F43	−0.25120 (16)	0.41942 (16)	0.17806 (18)	0.0560 (8)
F44	−0.18531 (19)	0.47703 (14)	0.10659 (14)	0.0488 (7)
F45	−0.16958 (18)	0.50112 (14)	0.21439 (14)	0.0465 (7)
C37	−0.1003 (2)	0.40286 (19)	0.18149 (19)	0.0247 (8)
C38	−0.0762 (2)	0.3666 (2)	0.1256 (2)	0.0268 (8)
H38	−0.0983	0.3778	0.0797	0.032*
C39	−0.0191 (2)	0.31374 (19)	0.13900 (19)	0.0250 (7)
C40	−0.0013 (3)	0.2665 (2)	0.0799 (2)	0.0324 (9)
F46	−0.0464 (3)	0.21060 (15)	0.08203 (16)	0.0623 (9)
F47	0.0824 (2)	0.2514 (2)	0.08321 (15)	0.0695 (11)
F48	−0.02508 (17)	0.29400 (13)	0.01846 (12)	0.0396 (6)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Hf1	0.01424 (7)	0.02359 (8)	0.02007 (7)	0.00008 (5)	0.00223 (5)	−0.00098 (5)
O1	0.0196 (12)	0.0175 (12)	0.0244 (12)	−0.0022 (9)	0.0017 (9)	0.0004 (10)
O2	0.0238 (13)	0.0251 (13)	0.0227 (12)	−0.0015 (11)	−0.0004 (10)	0.0004 (10)
C1	0.039 (2)	0.026 (2)	0.039 (2)	0.0008 (18)	−0.0011 (18)	0.0032 (17)
F1	0.0335 (15)	0.0406 (16)	0.124 (3)	−0.0167 (13)	−0.0194 (17)	0.0279 (18)
F2	0.0397 (14)	0.0284 (12)	0.0429 (14)	0.0032 (11)	0.0039 (11)	0.0071 (10)
F3	0.134 (3)	0.0309 (15)	0.0361 (15)	0.0035 (17)	−0.0021 (18)	−0.0064 (12)
C2	0.0182 (17)	0.0268 (19)	0.0267 (18)	−0.0002 (14)	0.0070 (14)	−0.0022 (15)
C3	0.0217 (17)	0.0296 (19)	0.0239 (18)	0.0024 (15)	0.0035 (14)	0.0013 (15)
C4	0.0158 (16)	0.0309 (19)	0.0223 (17)	0.0007 (14)	0.0045 (13)	−0.0038 (14)
C5	0.0246 (19)	0.035 (2)	0.0245 (18)	−0.0006 (16)	−0.0007 (14)	−0.0025 (16)
F4	0.0577 (18)	0.0619 (18)	0.0303 (13)	−0.0183 (15)	−0.0151 (12)	0.0127 (13)
F5	0.0524 (17)	0.076 (2)	0.0462 (16)	0.0190 (16)	−0.0125 (13)	−0.0371 (15)
F6	0.0255 (12)	0.0609 (17)	0.0379 (14)	−0.0113 (12)	−0.0028 (10)	−0.0009 (12)
O3	0.0188 (12)	0.0264 (13)	0.0255 (13)	−0.0040 (10)	0.0062 (10)	−0.0030 (10)
O4	0.0182 (12)	0.0254 (13)	0.0258 (13)	−0.0026 (10)	0.0024 (10)	−0.0003 (10)
C6	0.026 (2)	0.032 (2)	0.038 (2)	0.0018 (17)	0.0136 (16)	0.0044 (17)
F7	0.0374 (14)	0.0361 (14)	0.0643 (18)	0.0058 (11)	0.0229 (13)	0.0221 (13)
F8	0.0199 (12)	0.0537 (16)	0.0552 (16)	−0.0074 (11)	0.0060 (11)	0.0047 (13)
F9	0.0392 (14)	0.0495 (16)	0.0483 (15)	0.0039 (12)	0.0266 (12)	0.0013 (13)
C7	0.0168 (16)	0.0292 (19)	0.0229 (17)	0.0027 (14)	0.0029 (13)	0.0045 (14)
C8	0.0261 (19)	0.026 (2)	0.040 (2)	0.0032 (16)	0.0128 (16)	−0.0035 (17)
C9	0.0198 (17)	0.0252 (18)	0.0276 (18)	0.0020 (14)	0.0000 (14)	−0.0015 (15)
C10	0.035 (2)	0.025 (2)	0.042 (2)	−0.0024 (17)	0.0084 (18)	−0.0042 (17)
F10	0.119 (7)	0.047 (4)	0.049 (4)	−0.022 (5)	−0.040 (4)	−0.001 (3)
F11	0.035 (2)	0.021 (2)	0.067 (4)	0.0040 (18)	0.006 (2)	0.005 (2)
F12	0.051 (4)	0.029 (3)	0.111 (6)	−0.014 (2)	0.040 (4)	−0.018 (3)
F10A	0.131 (10)	0.053 (6)	0.058 (7)	−0.007 (7)	−0.018 (7)	0.020 (5)
F11A	0.046 (6)	0.048 (6)	0.111 (9)	−0.019 (4)	0.036 (6)	−0.035 (6)
F12A	0.053 (6)	0.038 (5)	0.040 (5)	−0.017 (5)	0.027 (5)	−0.015 (4)
O5	0.0195 (12)	0.0276 (14)	0.0260 (13)	0.0024 (10)	0.0074 (10)	0.0027 (10)
O6	0.0181 (12)	0.0296 (14)	0.0301 (14)	0.0014 (11)	0.0043 (10)	0.0012 (11)
C11	0.033 (2)	0.034 (2)	0.033 (2)	0.0026 (17)	0.0123 (17)	0.0064 (17)
F13	0.0559 (17)	0.0321 (14)	0.0493 (16)	−0.0095 (12)	0.0058 (13)	0.0042 (12)
F14	0.0388 (14)	0.0513 (17)	0.0469 (15)	0.0044 (13)	−0.0019 (12)	0.0151 (13)
F15	0.0627 (19)	0.0538 (18)	0.0585 (18)	0.0189 (15)	0.0395 (15)	0.0211 (14)
C12	0.0247 (18)	0.031 (2)	0.0259 (18)	0.0001 (16)	0.0044 (14)	−0.0017 (15)
C13	0.025 (2)	0.043 (2)	0.039 (2)	0.0070 (18)	0.0166 (17)	0.0074 (19)
C14	0.0182 (17)	0.034 (2)	0.038 (2)	0.0053 (16)	0.0047 (15)	0.0012 (17)
C15	0.040 (3)	0.047 (3)	0.068 (4)	0.021 (2)	0.024 (2)	0.020 (3)
F16	0.067 (6)	0.072 (6)	0.095 (6)	0.024 (4)	0.039 (5)	0.045 (5)
F17	0.014 (2)	0.043 (3)	0.051 (3)	0.009 (2)	0.005 (2)	0.003 (2)
F18	0.055 (4)	0.066 (5)	0.100 (6)	0.029 (4)	−0.015 (4)	−0.046 (4)
F16A	0.118 (8)	0.122 (8)	0.178 (9)	0.055 (6)	0.093 (7)	0.052 (7)
F17A	0.100 (6)	0.061 (5)	0.122 (7)	0.049 (5)	−0.008 (5)	−0.029 (5)
F18A	0.055 (5)	0.075 (7)	0.104 (6)	0.030 (4)	−0.038 (4)	0.009 (5)
O7	0.0180 (12)	0.0305 (14)	0.0217 (12)	0.0018 (10)	0.0019 (9)	−0.0019 (10)
O8	0.0231 (13)	0.0285 (14)	0.0213 (12)	0.0051 (11)	0.0009 (10)	−0.0021 (10)
C16	0.0260 (19)	0.028 (2)	0.035 (2)	0.0030 (16)	−0.0015 (16)	−0.0009 (16)
F19	0.0212 (12)	0.0384 (14)	0.077 (2)	0.0039 (11)	0.0022 (12)	−0.0007 (13)
F20	0.0564 (17)	0.0603 (18)	0.0382 (14)	0.0324 (15)	−0.0023 (12)	0.0073 (13)
F21	0.0462 (15)	0.0266 (13)	0.0557 (16)	0.0102 (11)	0.0005 (12)	−0.0081 (11)
C17	0.0169 (16)	0.0250 (19)	0.0309 (19)	−0.0006 (14)	0.0029 (14)	0.0003 (15)
C18	0.0228 (18)	0.030 (2)	0.0247 (18)	0.0027 (15)	−0.0022 (14)	−0.0015 (15)
C19	0.0219 (17)	0.0248 (18)	0.0259 (18)	−0.0003 (15)	0.0029 (14)	−0.0005 (15)
C20	0.034 (2)	0.039 (2)	0.026 (2)	0.0125 (19)	−0.0004 (16)	−0.0071 (17)
F22	0.050 (5)	0.054 (5)	0.028 (3)	0.009 (4)	0.001 (3)	−0.008 (3)
F23	0.067 (5)	0.032 (3)	0.053 (3)	0.002 (3)	0.009 (3)	−0.015 (2)
F24	0.039 (3)	0.093 (6)	0.050 (3)	0.040 (4)	−0.011 (2)	−0.036 (4)
F22A	0.108 (10)	0.039 (5)	0.062 (6)	0.020 (6)	0.014 (6)	−0.001 (4)
F23A	0.029 (4)	0.072 (7)	0.043 (5)	0.007 (4)	0.004 (3)	−0.035 (5)
F24A	0.026 (5)	0.052 (7)	0.027 (4)	0.005 (4)	−0.011 (3)	−0.019 (4)
Hf2	0.01420 (7)	0.02665 (8)	0.02060 (7)	−0.00038 (6)	0.00031 (5)	−0.00107 (6)
O9	0.0186 (12)	0.0308 (14)	0.0260 (13)	0.0009 (11)	−0.0007 (10)	0.0004 (11)
O10	0.0186 (12)	0.0286 (14)	0.0234 (12)	−0.0018 (10)	−0.0016 (9)	0.0003 (11)
C21	0.037 (2)	0.0241 (19)	0.034 (2)	0.0031 (17)	0.0047 (17)	0.0010 (16)
F25	0.098 (3)	0.0342 (15)	0.0448 (16)	−0.0029 (15)	0.0155 (16)	−0.0124 (12)
F26	0.0317 (14)	0.0352 (14)	0.078 (2)	−0.0096 (11)	0.0088 (13)	0.0022 (13)
F27	0.0558 (17)	0.0322 (14)	0.0580 (17)	−0.0022 (12)	−0.0043 (14)	0.0149 (12)
C22	0.0181 (16)	0.0286 (19)	0.0253 (18)	0.0033 (14)	0.0073 (13)	−0.0009 (14)
C23	0.0244 (18)	0.034 (2)	0.0212 (17)	0.0028 (16)	0.0037 (14)	0.0032 (15)
C24	0.0149 (16)	0.037 (2)	0.0192 (16)	0.0037 (15)	0.0051 (13)	−0.0022 (15)
C25	0.0216 (18)	0.044 (2)	0.0229 (18)	0.0022 (17)	−0.0005 (14)	−0.0011 (17)
F28	0.0448 (15)	0.0562 (17)	0.0366 (14)	0.0125 (13)	−0.0071 (11)	−0.0217 (12)
F29	0.0226 (12)	0.0686 (19)	0.0369 (14)	−0.0117 (12)	−0.0035 (10)	0.0035 (13)
F30	0.0379 (14)	0.0540 (16)	0.0293 (12)	0.0035 (12)	−0.0089 (10)	0.0052 (11)
O11	0.0196 (12)	0.0306 (14)	0.0277 (13)	−0.0020 (11)	0.0033 (10)	−0.0004 (11)
O12	0.0176 (12)	0.0299 (14)	0.0227 (12)	−0.0016 (10)	0.0020 (9)	−0.0018 (10)
C26	0.0196 (18)	0.035 (2)	0.036 (2)	0.0030 (16)	0.0073 (15)	0.0095 (17)
F31	0.0313 (13)	0.0470 (16)	0.0641 (18)	0.0078 (12)	0.0139 (12)	0.0304 (14)
F32	0.0199 (11)	0.0465 (15)	0.0528 (16)	−0.0037 (10)	−0.0006 (10)	0.0140 (12)
F33	0.0407 (15)	0.0632 (19)	0.0515 (16)	−0.0037 (14)	0.0281 (13)	−0.0019 (14)
C27	0.0170 (16)	0.035 (2)	0.0225 (17)	0.0024 (15)	0.0005 (13)	0.0054 (15)
C28	0.0211 (18)	0.037 (2)	0.0247 (18)	0.0028 (16)	0.0041 (14)	0.0000 (16)
C29	0.0192 (17)	0.033 (2)	0.0178 (16)	0.0016 (15)	−0.0015 (13)	−0.0017 (14)
C30	0.030 (2)	0.036 (2)	0.030 (2)	−0.0020 (17)	0.0048 (16)	−0.0046 (17)
F34	0.128 (3)	0.0372 (16)	0.0409 (16)	−0.0097 (18)	−0.0050 (18)	0.0070 (13)
F35	0.0303 (13)	0.0480 (16)	0.0709 (19)	−0.0102 (12)	0.0076 (13)	−0.0248 (14)
F36	0.0466 (16)	0.0405 (15)	0.0652 (18)	−0.0007 (13)	0.0237 (14)	−0.0183 (13)
O13	0.0201 (12)	0.0271 (14)	0.0263 (13)	0.0027 (11)	0.0049 (10)	0.0000 (11)
O14	0.0171 (12)	0.0301 (14)	0.0267 (13)	0.0022 (10)	0.0014 (10)	0.0026 (11)
C31	0.032 (2)	0.032 (2)	0.037 (2)	0.0057 (17)	0.0126 (17)	0.0044 (17)
F37	0.073 (2)	0.0308 (14)	0.0606 (18)	−0.0165 (14)	0.0039 (15)	0.0036 (13)
F38	0.0538 (17)	0.0460 (16)	0.0515 (17)	0.0079 (14)	−0.0031 (13)	0.0202 (13)
F39	0.088 (2)	0.0551 (19)	0.072 (2)	0.0272 (17)	0.0549 (19)	0.0304 (16)
C32	0.0234 (18)	0.0268 (19)	0.0244 (18)	−0.0001 (15)	0.0019 (14)	0.0023 (15)
C33	0.0253 (19)	0.029 (2)	0.031 (2)	0.0011 (16)	0.0083 (15)	0.0017 (16)
C34	0.0163 (16)	0.0255 (18)	0.0297 (19)	−0.0008 (14)	−0.0008 (14)	−0.0018 (15)
C35	0.0214 (19)	0.029 (2)	0.045 (2)	0.0055 (16)	0.0050 (17)	0.0053 (18)
F40	0.0387 (15)	0.0586 (18)	0.0557 (17)	0.0214 (13)	−0.0067 (13)	0.0100 (14)
F41	0.0525 (18)	0.0535 (18)	0.088 (2)	0.0253 (15)	0.0425 (17)	0.0226 (17)
F42	0.0473 (17)	0.0362 (15)	0.095 (2)	0.0051 (13)	−0.0006 (16)	−0.0217 (16)
O15	0.0162 (12)	0.0344 (15)	0.0227 (12)	0.0007 (10)	−0.0005 (10)	−0.0025 (11)
O16	0.0210 (12)	0.0320 (14)	0.0223 (13)	0.0014 (11)	−0.0022 (10)	−0.0019 (11)
C36	0.026 (2)	0.034 (2)	0.035 (2)	0.0081 (17)	−0.0081 (16)	−0.0049 (17)
F43	0.0200 (12)	0.0560 (18)	0.091 (2)	0.0033 (12)	−0.0011 (13)	0.0019 (16)
F44	0.0544 (17)	0.0492 (16)	0.0402 (15)	0.0228 (14)	−0.0073 (12)	0.0013 (12)
F45	0.0479 (16)	0.0421 (15)	0.0472 (15)	0.0167 (13)	−0.0056 (12)	−0.0134 (12)
C37	0.0177 (17)	0.0291 (19)	0.0261 (18)	−0.0006 (14)	−0.0039 (14)	0.0001 (15)
C38	0.0203 (17)	0.035 (2)	0.0239 (18)	0.0001 (15)	−0.0025 (14)	0.0000 (15)
C39	0.0190 (17)	0.0292 (19)	0.0268 (18)	−0.0045 (15)	0.0024 (14)	−0.0021 (15)
C40	0.029 (2)	0.041 (2)	0.0262 (19)	0.0044 (18)	−0.0003 (15)	−0.0060 (17)
F46	0.104 (3)	0.0360 (16)	0.0479 (17)	−0.0099 (17)	0.0146 (17)	−0.0098 (13)
F47	0.0433 (16)	0.121 (3)	0.0426 (16)	0.0370 (18)	−0.0044 (13)	−0.0322 (18)
F48	0.0481 (15)	0.0465 (15)	0.0239 (12)	0.0037 (12)	0.0024 (10)	−0.0037 (10)

Geometric parameters (Å, º) top

Hf1—O1	2.169 (2)	C20—F24	1.269 (7)
Hf1—O2	2.143 (2)	C20—F22A	1.292 (7)
Hf1—O3	2.156 (2)	C20—F23A	1.390 (7)
Hf1—O4	2.179 (3)	C20—F24A	1.336 (8)
Hf1—O5	2.140 (2)	Hf2—O9	2.166 (3)
Hf1—O6	2.202 (3)	Hf2—O10	2.134 (2)
Hf1—O7	2.180 (2)	Hf2—O11	2.154 (3)
Hf1—O8	2.153 (2)	Hf2—O12	2.188 (3)
O1—C2	1.259 (4)	Hf2—O13	2.135 (3)
O2—C4	1.267 (5)	Hf2—O14	2.210 (2)
C1—F1	1.325 (5)	Hf2—O15	2.193 (2)
C1—F2	1.327 (5)	Hf2—O16	2.149 (3)
C1—F3	1.331 (5)	O9—C22	1.260 (4)
C1—C2	1.526 (6)	O10—C24	1.275 (5)
C2—C3	1.394 (5)	C21—F25	1.321 (5)
C3—H3	0.9500	C21—F26	1.325 (5)
C3—C4	1.385 (5)	C21—F27	1.331 (5)
C4—C5	1.530 (5)	C21—C22	1.523 (6)
C5—F4	1.326 (5)	C22—C23	1.402 (5)
C5—F5	1.320 (5)	C23—H23	0.9500
C5—F6	1.321 (5)	C23—C24	1.373 (6)
O3—C7	1.258 (4)	C24—C25	1.524 (5)
O4—C9	1.255 (4)	C25—F28	1.317 (5)
C6—F7	1.327 (5)	C25—F29	1.332 (5)
C6—F8	1.327 (5)	C25—F30	1.334 (5)
C6—F9	1.325 (5)	O11—C27	1.267 (5)
C6—C7	1.530 (5)	O12—C29	1.259 (4)
C7—C8	1.374 (6)	C26—F31	1.322 (5)
C8—H8	0.9500	C26—F32	1.326 (5)
C8—C9	1.393 (5)	C26—F33	1.325 (5)
C9—C10	1.531 (5)	C26—C27	1.535 (5)
C10—F10	1.254 (9)	C27—C28	1.372 (6)
C10—F11	1.351 (7)	C28—H28	0.9500
C10—F12	1.314 (7)	C28—C29	1.399 (5)
C10—F10A	1.284 (8)	C29—C30	1.522 (6)
C10—F11A	1.355 (8)	C30—F34	1.309 (5)
C10—F12A	1.367 (8)	C30—F35	1.319 (5)
O5—C12	1.273 (4)	C30—F36	1.328 (5)
O6—C14	1.247 (5)	O13—C32	1.273 (4)
C11—F13	1.323 (5)	O14—C34	1.247 (4)
C11—F14	1.316 (5)	C31—F37	1.320 (5)
C11—F15	1.328 (5)	C31—F38	1.315 (5)
C11—C12	1.535 (6)	C31—F39	1.319 (5)
C12—C13	1.377 (6)	C31—C32	1.536 (5)
C13—H13	0.9500	C32—C33	1.375 (5)
C13—C14	1.391 (6)	C33—H33	0.9500
C14—C15	1.533 (6)	C33—C34	1.394 (5)
C15—F16	1.252 (10)	C34—C35	1.528 (5)
C15—F17	1.386 (8)	C35—F40	1.309 (5)
C15—F18	1.301 (9)	C35—F41	1.323 (5)
C15—F16A	1.288 (7)	C35—F42	1.316 (5)
C15—F17A	1.354 (7)	O15—C37	1.253 (4)
C15—F18A	1.338 (7)	O16—C39	1.256 (4)
O7—C17	1.253 (4)	C36—F43	1.330 (5)
O8—C19	1.256 (4)	C36—F44	1.326 (5)
C16—F19	1.335 (5)	C36—F45	1.319 (5)
C16—F20	1.327 (5)	C36—C37	1.527 (5)
C16—F21	1.312 (5)	C37—C38	1.393 (5)
C16—C17	1.536 (5)	C38—H38	0.9500
C17—C18	1.390 (5)	C38—C39	1.381 (5)
C18—H18	0.9500	C39—C40	1.539 (5)
C18—C19	1.382 (5)	C40—F46	1.321 (5)
C19—C20	1.517 (5)	C40—F47	1.312 (5)
C20—F22	1.301 (9)	C40—F48	1.332 (5)
C20—F23	1.396 (8)

O1—Hf1—O4	141.51 (9)	F24—C20—C19	115.7 (4)
O1—Hf1—O6	74.26 (9)	F24—C20—F22	112.2 (7)
O1—Hf1—O7	115.03 (9)	F24—C20—F23	104.3 (6)
O2—Hf1—O1	79.10 (9)	F22A—C20—C19	115.2 (6)
O2—Hf1—O3	80.29 (10)	F22A—C20—F23A	106.0 (6)
O2—Hf1—O4	73.14 (10)	F22A—C20—F24A	110.0 (7)
O2—Hf1—O6	72.25 (10)	F23A—C20—C19	104.9 (5)
O2—Hf1—O7	142.70 (9)	F24A—C20—C19	116.0 (9)
O2—Hf1—O8	141.22 (10)	F24A—C20—F23A	103.3 (7)
O3—Hf1—O1	71.72 (9)	O9—Hf2—O12	139.70 (10)
O3—Hf1—O4	77.68 (9)	O9—Hf2—O14	73.87 (10)
O3—Hf1—O6	139.51 (10)	O9—Hf2—O15	117.38 (10)
O3—Hf1—O7	72.90 (10)	O10—Hf2—O9	79.18 (10)
O4—Hf1—O6	119.96 (10)	O10—Hf2—O11	83.08 (10)
O4—Hf1—O7	76.13 (9)	O10—Hf2—O12	73.06 (10)
O5—Hf1—O1	143.59 (9)	O10—Hf2—O13	107.70 (10)
O5—Hf1—O2	109.99 (10)	O10—Hf2—O14	72.91 (10)
O5—Hf1—O3	143.43 (10)	O10—Hf2—O15	142.29 (10)
O5—Hf1—O4	72.53 (9)	O10—Hf2—O16	142.40 (10)
O5—Hf1—O6	75.39 (10)	O11—Hf2—O9	70.66 (10)
O5—Hf1—O7	79.69 (9)	O11—Hf2—O12	77.41 (10)
O5—Hf1—O8	80.44 (10)	O11—Hf2—O14	140.16 (10)
O7—Hf1—O6	143.35 (9)	O11—Hf2—O15	72.67 (10)
O8—Hf1—O1	72.62 (10)	O12—Hf2—O14	122.75 (9)
O8—Hf1—O3	114.06 (10)	O12—Hf2—O15	73.74 (9)
O8—Hf1—O4	143.20 (10)	O13—Hf2—O9	144.60 (10)
O8—Hf1—O6	74.88 (10)	O13—Hf2—O11	143.61 (10)
O8—Hf1—O7	74.82 (9)	O13—Hf2—O12	73.12 (9)
C2—O1—Hf1	132.6 (2)	O13—Hf2—O14	75.27 (9)
C4—O2—Hf1	132.7 (2)	O13—Hf2—O15	78.88 (9)
F1—C1—F2	107.3 (4)	O13—Hf2—O16	81.55 (10)
F1—C1—F3	109.1 (4)	O15—Hf2—O14	142.20 (9)
F1—C1—C2	110.2 (3)	O16—Hf2—O9	73.96 (10)
F2—C1—F3	106.3 (4)	O16—Hf2—O11	111.38 (10)
F2—C1—C2	113.5 (4)	O16—Hf2—O12	142.55 (10)
F3—C1—C2	110.3 (4)	O16—Hf2—O14	74.66 (9)
O1—C2—C1	112.8 (3)	O16—Hf2—O15	74.65 (10)
O1—C2—C3	127.6 (4)	C22—O9—Hf2	132.8 (2)
C3—C2—C1	119.6 (3)	C24—O10—Hf2	132.9 (2)
C2—C3—H3	120.1	F25—C21—F26	108.1 (4)
C4—C3—C2	119.8 (4)	F25—C21—F27	107.7 (3)
C4—C3—H3	120.1	F25—C21—C22	111.2 (3)
O2—C4—C3	128.1 (3)	F26—C21—F27	107.4 (3)
O2—C4—C5	112.4 (3)	F26—C21—C22	109.5 (3)
C3—C4—C5	119.4 (3)	F27—C21—C22	112.7 (3)
F4—C5—C4	113.2 (3)	O9—C22—C21	114.1 (3)
F5—C5—C4	110.5 (3)	O9—C22—C23	126.4 (4)
F5—C5—F4	108.4 (3)	C23—C22—C21	119.5 (3)
F5—C5—F6	106.7 (4)	C22—C23—H23	119.6
F6—C5—C4	110.8 (3)	C24—C23—C22	120.9 (4)
F6—C5—F4	106.9 (3)	C24—C23—H23	119.6
C7—O3—Hf1	134.4 (2)	O10—C24—C23	127.3 (3)
C9—O4—Hf1	133.2 (2)	O10—C24—C25	112.4 (3)
F7—C6—F8	108.1 (4)	C23—C24—C25	120.2 (3)
F7—C6—C7	110.7 (3)	F28—C25—C24	111.2 (3)
F8—C6—C7	109.5 (3)	F28—C25—F29	107.9 (4)
F9—C6—F7	107.7 (3)	F28—C25—F30	107.7 (3)
F9—C6—F8	107.5 (3)	F29—C25—C24	110.1 (3)
F9—C6—C7	113.1 (3)	F29—C25—F30	106.9 (3)
O3—C7—C6	113.3 (3)	F30—C25—C24	112.8 (3)
O3—C7—C8	127.0 (3)	C27—O11—Hf2	133.7 (2)
C8—C7—C6	119.7 (3)	C29—O12—Hf2	132.8 (2)
C7—C8—H8	119.9	F31—C26—F32	107.4 (4)
C7—C8—C9	120.3 (4)	F31—C26—F33	108.9 (3)
C9—C8—H8	119.9	F31—C26—C27	111.9 (3)
O4—C9—C8	127.3 (4)	F32—C26—C27	108.7 (3)
O4—C9—C10	115.5 (3)	F33—C26—F32	107.2 (3)
C8—C9—C10	117.2 (3)	F33—C26—C27	112.5 (3)
F10—C10—C9	112.7 (6)	O11—C27—C26	112.8 (3)
F10—C10—F11	107.8 (7)	O11—C27—C28	127.2 (3)
F10—C10—F12	113.1 (6)	C28—C27—C26	120.0 (3)
F11—C10—C9	108.5 (4)	C27—C28—H28	119.9
F12—C10—C9	112.0 (4)	C27—C28—C29	120.1 (4)
F12—C10—F11	102.0 (5)	C29—C28—H28	119.9
F10A—C10—C9	115.0 (8)	O12—C29—C28	127.0 (4)
F10A—C10—F11A	110.2 (7)	O12—C29—C30	113.9 (3)
F10A—C10—F12A	107.8 (8)	C28—C29—C30	119.1 (3)
F11A—C10—C9	111.0 (6)	F34—C30—C29	110.9 (3)
F11A—C10—F12A	101.1 (6)	F34—C30—F35	108.7 (4)
F12A—C10—C9	110.8 (7)	F34—C30—F36	107.8 (4)
C12—O5—Hf1	134.6 (3)	F35—C30—C29	110.9 (3)
C14—O6—Hf1	133.7 (3)	F35—C30—F36	105.8 (3)
F13—C11—F15	107.8 (4)	F36—C30—C29	112.6 (3)
F13—C11—C12	110.4 (3)	C32—O13—Hf2	134.6 (2)
F14—C11—F13	107.6 (4)	C34—O14—Hf2	133.4 (2)
F14—C11—F15	107.9 (4)	F37—C31—C32	110.8 (3)
F14—C11—C12	111.2 (3)	F38—C31—F37	107.1 (4)
F15—C11—C12	111.8 (3)	F38—C31—F39	108.2 (4)
O5—C12—C11	112.7 (3)	F38—C31—C32	110.8 (3)
O5—C12—C13	126.9 (4)	F39—C31—F37	107.5 (4)
C13—C12—C11	120.3 (3)	F39—C31—C32	112.1 (3)
C12—C13—H13	120.6	O13—C32—C31	112.8 (3)
C12—C13—C14	118.9 (4)	O13—C32—C33	127.2 (4)
C14—C13—H13	120.6	C33—C32—C31	120.0 (3)
O6—C14—C13	126.3 (4)	C32—C33—H33	120.6
O6—C14—C15	114.3 (4)	C32—C33—C34	118.7 (3)
C13—C14—C15	119.4 (4)	C34—C33—H33	120.6
F16—C15—C14	116.5 (6)	O14—C34—C33	126.3 (3)
F16—C15—F17	105.5 (7)	O14—C34—C35	113.7 (3)
F16—C15—F18	112.7 (8)	C33—C34—C35	120.1 (3)
F17—C15—C14	108.2 (4)	F40—C35—C34	111.5 (4)
F18—C15—C14	110.1 (5)	F40—C35—F41	108.2 (3)
F18—C15—F17	102.7 (6)	F40—C35—F42	107.6 (4)
F16A—C15—C14	114.5 (6)	F41—C35—C34	112.5 (3)
F16A—C15—F17A	109.4 (7)	F42—C35—C34	110.2 (3)
F16A—C15—F18A	111.0 (7)	F42—C35—F41	106.6 (4)
F17A—C15—C14	108.3 (5)	C37—O15—Hf2	133.5 (2)
F18A—C15—C14	109.6 (6)	C39—O16—Hf2	133.8 (3)
F18A—C15—F17A	103.4 (6)	F43—C36—C37	108.9 (3)
C17—O7—Hf1	134.0 (2)	F44—C36—F43	107.7 (3)
C19—O8—Hf1	134.9 (2)	F44—C36—C37	112.4 (3)
F19—C16—C17	109.3 (3)	F45—C36—F43	107.5 (4)
F20—C16—F19	107.5 (3)	F45—C36—F44	108.3 (4)
F20—C16—C17	112.0 (3)	F45—C36—C37	111.9 (3)
F21—C16—F19	107.3 (3)	O15—C37—C36	114.8 (3)
F21—C16—F20	108.5 (3)	O15—C37—C38	126.4 (3)
F21—C16—C17	112.0 (3)	C38—C37—C36	118.8 (3)
O7—C17—C16	114.4 (3)	C37—C38—H38	121.0
O7—C17—C18	126.9 (3)	C39—C38—C37	118.0 (3)
C18—C17—C16	118.6 (3)	C39—C38—H38	121.0
C17—C18—H18	121.0	O16—C39—C38	126.9 (4)
C19—C18—C17	118.1 (3)	O16—C39—C40	113.7 (3)
C19—C18—H18	121.0	C38—C39—C40	119.3 (3)
O8—C19—C18	126.4 (3)	F46—C40—C39	111.4 (3)
O8—C19—C20	113.8 (3)	F46—C40—F48	106.7 (3)
C18—C19—C20	119.7 (3)	F47—C40—C39	110.8 (3)
F22—C20—C19	112.0 (7)	F47—C40—F46	108.2 (4)
F22—C20—F23	104.1 (6)	F47—C40—F48	108.1 (4)
F23—C20—C19	107.6 (4)	F48—C40—C39	111.4 (3)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C3—H3···F23Aⁱ	0.95	2.57	3.374 (10)	143
C8—H8···F5ⁱⁱ	0.95	2.50	3.427 (5)	166
C33—H33···F11Aⁱⁱⁱ	0.95	2.49	3.292 (9)	142
C13—H13···F35ⁱⁱⁱ	0.95	2.65	3.528 (5)	154
C3—H3···F24ⁱ	0.95	2.68	3.375 (8)	130

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

Acknowledgements

We thank Sumeng Liu for helpful suggestions.

Funding information

We thank the National Science Foundation for financial support under grant CHE 1665191.

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