Tetra­kis(1,1,1-trifluoro­acetyl­acetonato-κ2O,O′)zirconium(IV) toluene solvate

Steyn, M.; Roodt, A.; Steyl, G.

doi:10.1107/S1600536808014499

metal-organic compounds

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ISSN: 2056-9890

Volume 64| Part 6| June 2008| Page m827

doi:10.1107/S1600536808014499

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Tetrakis(1,1,1-trifluoroacetylacetonato-κ²O,O′)zirconium(IV) toluene solvate

Maryke Steyn,^a Andreas Roodt ^a and Gideon Steyl ^a ^*

^aDepartment of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa
^*Correspondence e-mail: steylg.sci@ufs.ac.za

(Received 12 May 2008; accepted 14 May 2008; online 21 May 2008)

In the title compound, [Zr(C₅H₄F₃O₂)₄]·C₇H₈, the Zr atom is in a square-antiprismatic coordination geometry that comprises four O,O′-bidentate trifluoroacetylacetonate ligands. The O—Zr—O bite angles of the acetonate ligands range from 75.27 (5) to 75.41 (5)°. The Zr atom is located on a twofold rotation axis.

Related literature

For β-diketone complexes of zirconium, see: Allard (1976 ); Clegg (1987 ); Calderazzo et al. (1998 ); Davis & Einstein (1978 ); Elder (1969 ); Silverton & Hoard (1963 ). For the unsolvated title complex, see: Kurat'eva et al. (2007 ). For a comparison with the isomorphous hafnium complex, see: Viljoen et al. (2008 ).

Experimental

Crystal data

[Zr(C₅H₄F₃O₂)₄]·C₇H₈
M_r = 887.82
Monoclinic, C 2/c
a = 22.537 (5) Å
b = 8.054 (5) Å
c = 22.786 (5) Å
β = 118.383 (5)°
V = 3639 (3) Å³
Z = 4
Mo Kα radiation
μ = 0.41 mm⁻¹
T = 100 (2) K
0.33 × 0.22 × 0.20 mm

Data collection

Bruker SMART APEXII CCD area-detector diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 1998 ) T_min = 0.876, T_max = 0.922
14897 measured reflections
3975 independent reflections
3559 reflections with I > 2σ(I)
R_int = 0.029

Refinement

R[F² > 2σ(F²)] = 0.029
wR(F²) = 0.070
S = 1.05
3975 reflections
259 parameters
H atoms treated by a mixture of independent and constrained refinement
Δρ_max = 0.50 e Å⁻³
Δρ_min = −0.45 e Å⁻³

Table 1
Selected geometric parameters (Å, °)

Zr—O01	2.1633 (13)
Zr—O11	2.1679 (13)
Zr—O02	2.1973 (15)
Zr—O12	2.2079 (15)

O01ⁱ—Zr—O01	142.07 (7)
O01—Zr—O11	80.66 (5)
O11—Zr—O11ⁱ	142.56 (7)
O01—Zr—O02	75.41 (5)
O11—Zr—O02	76.85 (5)
O01—Zr—O12	76.90 (5)
O11—Zr—O12	75.27 (5)
Symmetry code: (i) $[-x+1, y, -z+{\script{3\over 2}}]$ .

Data collection: APEX2 (Bruker, 2005 ); cell refinement: SAINT-Plus (Bruker, 2004 ); data reduction: SAINT-Plus and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 2005 ); software used to prepare material for publication: SHELXL97.

Supporting information

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536808014499/ng2456sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536808014499/ng2456Isup2.hkl

checkCIF report

Comment top

Zirconium complexes containing diketonato ligands have been reported in the past (Silverton & Hoard, 1963; Allard, 1976; Clegg, 1987; Elder et al., 1969; Calderazzo et al., 1998; Davis & Einstein, 1978). The following diketonato ligand complexes have been reported; acetylacetone (acacH), hexafluoroacetylacetone (hfaaH), tropolone (tropH) and trifluoroacetylacetone (tfaaH). Our research group's interest is in the solvated form of trifluoroacetylacetonato-zirconium(IV) complexes. The title compound is presented as an example of a toluene solvated species.

The title compound is composed of an eight-coordinate zirconium metal centre in which the four O,O-donating bidentate tfaa-ligands are arranged around the metal centre to give a distorted square antiprismatic geometry. The molecule has an inversion centre on the metal with two bidentate ligands on either side including a non-disordered toluene solvate molecule found in a 1:1 ratio to the zirconium complex. The bidentate ligands are coordinated in an alternating configuration with respect to the CF₃ groups. This ligand interchange can be visualized as four fins or propellar blades around the metal centre. The distorted square antiprism is defined by the intersection of the two planes formed by the ligand-backbone (O—C—C—C—O) and the O—Zr—O bite angle, which bend inward at an angle of 19.84 - 20.23°. Within the bidentate ligand structural representation, the Zr—O₁ (CF₃-side bond) and Zr—O₂ (CH₃-side bond) bond distances are unequal, varying by 0.034 - 0.040 Å. The bite angles of the bidentate ligands to the metal centre are 75.27 (5) and 75.41 (5)°, respectively.

π-π Stacking is observed between the two toluene solvate molecules C100—C106 and C100—C106 (-1/2 + x, 0.5 - y, -1/2 + z) with an interplanar distance of 3.548 Å and a centroid-to-centroid distance of 4.933 Å. Weak C—H-π intermolecular interactions are observed between the toluene solvate and the tfaa-moiety: C105—H105 to C12 (3.786 Å, 172.96 °) and C106—H10D to C14 (3.702 Å, 67.74 °), respectively.

Compared to a recently published structure (Kurat'eva et al., 2007) of the unsolvated complex the deviation in characteristics between the solvated and unsolvated species are minimal. The Zr—O bond length on the CF₃-side of the acetylacetonato group, is shorter than the CH₃-side bond by an average of 0.035 Å. The angles at which the ligands bend out of the O—Zr—O plane show the most notable difference, with the steric interaction of the toluene molecule distorting the two fins formed on the zirconium complex. This observation is further clarified by an overlay of the solvated and unsolvated zirconium complexes, which has an RMS overlay error of less than 1 Å (excluding H and CF₃) indicating the distortion impact of the toluene solvate.

Related literature top

For β-diketone complexes of zirconium, see: Allard (1976); Clegg (1987); Calderazzo et al. (1998); Davis & Einstein (1978); Elder (1969); Silverton & Hoard (1963). For the unsolvated complex of the title compound, see: Kurat'eva, et al. (2007). For a comparison with the hafnium complex, see: Viljoen et al. (2008).

Experimental top

Chemicals were purchased from Sigma-Aldrich and used as received except for toluene which was dried by passage over alumina. Synthesis of [Zr(Tfaa)₄] was done under Schlenk conditions. ZrCl₄ (218.8 mg, 0.9389 mmol) was added to TfaaNa (663.4 mg, 3.768 mmol, 4eq) in dry toluene (50 ml). This slurry was refluxed for 16 h at 80°C before filtration of the remaining precipitates. The filtrate was recrystalized at -23°C to yield crystals suitable for data collection. Spectroscopic data: ¹⁹F NMR (C₆D₆, 564.77 MHz, p.p.m.): -75.3; IR (ATR) ν(CO): 1533 cm^-1.

Computing details top

Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT-Plus (Bruker, 2004); data reduction: SAINT-Plus and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top

Fig. 1. : Representation of the title compound (I), showing the numbering scheme and displacement ellipsoids (50% probability). For the carbon atoms, first digit refers to acetonato backbone moiety, second digit to atom on this backbone. Hydrogen and fluorine atoms are labeled in accordance with specific carbon attached to on acetylacetonato backbone. Hydrogen atoms are omitted for clarity.

Tetrakis(1,1,1-trifluoroacetylacetonato-κ²O,O')zirconium(IV) toluene solvate top

Crystal data top

[Zr(C₅H₄F₃O₂)₄]·C₇H₈	F(000) = 1792
M_r = 887.82	D_x = 1.621 Mg m⁻³
Monoclinic, C2/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2yc	Cell parameters from 7203 reflections
a = 22.537 (5) Å	θ = 2.7–28.3°
b = 8.054 (5) Å	µ = 0.41 mm⁻¹
c = 22.786 (5) Å	T = 100 K
β = 118.383 (5)°	Cuboid, colourless
V = 3639 (3) Å³	0.33 × 0.22 × 0.20 mm
Z = 4

Data collection top

Bruker SMART CCD area-detector diffractometer	3975 independent reflections
Radiation source: fine-focus sealed tube	3559 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.029
ϕ and ω scans	θ_max = 27.0°, θ_min = 2.1°
Absorption correction: multi-scan (SADABS; Bruker, 1998)	h = −28→25
T_min = 0.876, T_max = 0.922	k = −10→7
14897 measured reflections	l = −28→29

Refinement top

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)] = 0.029	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.070	H atoms treated by a mixture of independent and constrained refinement
S = 1.05	w = 1/[σ²(F_o²) + (0.0265P)² + 6.0538P] where P = (F_o² + 2F_c²)/3
3975 reflections	(Δ/σ)_max = 0.001
259 parameters	Δρ_max = 0.50 e Å⁻³
0 restraints	Δρ_min = −0.45 e Å⁻³

Crystal data top

[Zr(C₅H₄F₃O₂)₄]·C₇H₈	V = 3639 (3) Å³
M_r = 887.82	Z = 4
Monoclinic, C2/c	Mo Kα radiation
a = 22.537 (5) Å	µ = 0.41 mm⁻¹
b = 8.054 (5) Å	T = 100 K
c = 22.786 (5) Å	0.33 × 0.22 × 0.20 mm
β = 118.383 (5)°

Data collection top

Bruker SMART CCD area-detector diffractometer	3975 independent reflections
Absorption correction: multi-scan (SADABS; Bruker, 1998)	3559 reflections with I > 2σ(I)
T_min = 0.876, T_max = 0.922	R_int = 0.029
14897 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.029	0 restraints
wR(F²) = 0.070	H atoms treated by a mixture of independent and constrained refinement
S = 1.05	Δρ_max = 0.50 e Å⁻³
3975 reflections	Δρ_min = −0.45 e Å⁻³
259 parameters

Special details top

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. 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.

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

	x	y	z	U_iso*/U_eq	Occ. (<1)
Zr	0.5000	0.16714 (3)	0.7500	0.01245 (7)
F13	0.26810 (6)	−0.05226 (14)	0.66176 (6)	0.0295 (3)
F11	0.31909 (6)	−0.06998 (14)	0.76862 (6)	0.0287 (3)
F03	0.51411 (7)	0.40573 (15)	0.95310 (6)	0.0340 (3)
F02	0.45468 (7)	0.22014 (15)	0.96764 (6)	0.0368 (3)
O11	0.39952 (6)	0.08075 (15)	0.72452 (6)	0.0158 (3)
O02	0.51936 (6)	−0.05446 (15)	0.81277 (6)	0.0166 (3)
O01	0.49399 (6)	0.25443 (15)	0.83681 (6)	0.0169 (3)
F12	0.24250 (6)	0.11472 (15)	0.71971 (7)	0.0366 (3)
O12	0.43558 (6)	0.38983 (15)	0.71261 (6)	0.0171 (3)
F01	0.40934 (7)	0.38633 (18)	0.88399 (6)	0.0431 (4)
C13	0.33615 (9)	0.3227 (2)	0.71690 (10)	0.0200 (4)
C02	0.48042 (9)	0.1790 (2)	0.87851 (9)	0.0174 (4)
C05	0.50748 (11)	−0.2801 (2)	0.87225 (10)	0.0244 (4)
H05A	0.5085	−0.3440	0.8372	0.037*
H05B	0.4693	−0.3129	0.8774	0.037*
H05C	0.5481	−0.2994	0.9132	0.037*
C12	0.34797 (9)	0.1566 (2)	0.72089 (8)	0.0160 (3)
C01	0.46413 (10)	0.2976 (2)	0.92118 (9)	0.0230 (4)
C11	0.29404 (9)	0.0373 (2)	0.71787 (10)	0.0214 (4)
C14	0.38103 (9)	0.4351 (2)	0.70992 (9)	0.0182 (4)
C03	0.47956 (10)	0.0124 (2)	0.88819 (9)	0.0200 (4)
C04	0.50208 (9)	−0.1001 (2)	0.85506 (9)	0.0174 (4)
C102	0.67683 (12)	0.0133 (3)	1.07100 (11)	0.0402 (6)
H102	0.6803	−0.0134	1.1122	0.048*
C15	0.36143 (10)	0.6138 (2)	0.69579 (11)	0.0257 (4)
H15A	0.4003	0.6786	0.7036	0.039*
H15B	0.3440	0.6517	0.7246	0.039*
H15C	0.3274	0.6260	0.6501	0.039*
C105	0.66546 (11)	0.0938 (4)	0.94967 (11)	0.0403 (6)
H105	0.6612	0.1195	0.9080	0.048*
C104	0.67351 (12)	−0.0692 (3)	0.96984 (12)	0.0428 (6)
H104	0.6748	−0.1519	0.9420	0.051*
C100	0.66358 (10)	0.2198 (3)	0.98939 (11)	0.0337 (5)
C101	0.66888 (11)	0.1768 (3)	1.05052 (11)	0.0352 (5)
H101	0.6671	0.2593	1.0782	0.042*
C103	0.67966 (12)	−0.1103 (3)	1.03094 (13)	0.0411 (6)
H103	0.6857	−0.2203	1.0450	0.049*
C106	0.65652 (13)	0.3975 (4)	0.96634 (16)	0.0586 (8)
H10A	0.6561	0.4691	0.9998	0.088*	0.50
H10B	0.6151	0.4103	0.9255	0.088*	0.50
H10C	0.6938	0.4262	0.9590	0.088*	0.50
H10D	0.6540	0.4013	0.9231	0.088*	0.50
H10E	0.6949	0.4601	0.9974	0.088*	0.50
H10F	0.6162	0.4442	0.9639	0.088*	0.50
H03	0.4677 (11)	−0.027 (3)	0.9208 (10)	0.024 (6)*
H13	0.2975 (12)	0.361 (3)	0.7144 (11)	0.028 (6)*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Zr	0.01529 (12)	0.00880 (12)	0.01714 (12)	0.000	0.01087 (9)	0.000
F13	0.0252 (6)	0.0253 (6)	0.0364 (6)	−0.0084 (5)	0.0133 (5)	−0.0067 (5)
F11	0.0325 (6)	0.0214 (6)	0.0384 (7)	−0.0030 (5)	0.0221 (6)	0.0069 (5)
F03	0.0518 (8)	0.0227 (6)	0.0398 (7)	−0.0104 (6)	0.0318 (6)	−0.0121 (5)
F02	0.0681 (9)	0.0251 (6)	0.0407 (7)	−0.0054 (6)	0.0450 (7)	−0.0025 (5)
O11	0.0164 (6)	0.0125 (6)	0.0217 (6)	0.0012 (5)	0.0116 (5)	0.0004 (5)
O02	0.0188 (6)	0.0140 (6)	0.0206 (6)	0.0007 (5)	0.0123 (5)	0.0025 (5)
O01	0.0222 (6)	0.0131 (6)	0.0199 (6)	−0.0008 (5)	0.0136 (5)	0.0003 (5)
F12	0.0295 (7)	0.0204 (6)	0.0776 (10)	0.0012 (5)	0.0399 (7)	0.0000 (6)
O12	0.0193 (6)	0.0134 (6)	0.0231 (6)	0.0016 (5)	0.0136 (5)	0.0024 (5)
F01	0.0451 (8)	0.0518 (9)	0.0367 (7)	0.0246 (7)	0.0229 (6)	−0.0001 (6)
C13	0.0184 (9)	0.0161 (9)	0.0311 (10)	0.0030 (7)	0.0163 (8)	0.0012 (8)
C02	0.0192 (9)	0.0182 (9)	0.0173 (8)	−0.0009 (7)	0.0106 (7)	−0.0008 (7)
C05	0.0343 (11)	0.0156 (9)	0.0300 (10)	−0.0006 (8)	0.0208 (9)	0.0034 (8)
C12	0.0164 (8)	0.0158 (9)	0.0192 (8)	0.0001 (7)	0.0113 (7)	−0.0005 (7)
C01	0.0319 (11)	0.0205 (10)	0.0228 (9)	0.0012 (8)	0.0180 (8)	0.0014 (7)
C11	0.0203 (9)	0.0160 (9)	0.0342 (10)	0.0017 (7)	0.0180 (8)	0.0001 (8)
C14	0.0217 (9)	0.0146 (9)	0.0202 (9)	0.0034 (7)	0.0115 (7)	0.0012 (7)
C03	0.0260 (10)	0.0186 (9)	0.0212 (9)	−0.0010 (7)	0.0159 (8)	0.0023 (7)
C04	0.0163 (9)	0.0164 (9)	0.0194 (8)	−0.0018 (7)	0.0084 (7)	0.0020 (7)
C102	0.0378 (13)	0.0551 (16)	0.0294 (11)	−0.0099 (11)	0.0174 (10)	0.0037 (11)
C15	0.0268 (10)	0.0148 (9)	0.0406 (11)	0.0043 (8)	0.0202 (9)	0.0043 (8)
C105	0.0264 (11)	0.0699 (18)	0.0234 (10)	−0.0085 (11)	0.0108 (9)	−0.0024 (11)
C104	0.0286 (12)	0.0546 (17)	0.0453 (14)	−0.0078 (11)	0.0177 (11)	−0.0252 (12)
C100	0.0176 (10)	0.0387 (13)	0.0346 (11)	−0.0053 (9)	0.0040 (9)	0.0047 (10)
C101	0.0305 (12)	0.0414 (14)	0.0330 (11)	−0.0061 (10)	0.0145 (9)	−0.0128 (10)
C103	0.0284 (12)	0.0329 (13)	0.0552 (15)	−0.0059 (10)	0.0144 (11)	−0.0016 (11)
C106	0.0288 (13)	0.0518 (17)	0.0718 (19)	−0.0054 (12)	0.0048 (13)	0.0233 (15)

Geometric parameters (Å, º) top

Zr—O01ⁱ	2.1633 (13)	C05—H05C	0.9600
Zr—O01	2.1633 (13)	C12—C11	1.525 (3)
Zr—O11	2.1679 (13)	C14—C15	1.496 (3)
Zr—O11ⁱ	2.1679 (13)	C03—C04	1.419 (3)
Zr—O02ⁱ	2.1973 (15)	C03—H03	0.95 (2)
Zr—O02	2.1973 (15)	C102—C103	1.372 (4)
Zr—O12ⁱ	2.2079 (15)	C102—C101	1.381 (4)
Zr—O12	2.2079 (15)	C102—H102	0.9300
F13—C11	1.336 (2)	C15—H15A	0.9600
F11—C11	1.335 (2)	C15—H15B	0.9600
F03—C01	1.333 (2)	C15—H15C	0.9600
F02—C01	1.330 (2)	C105—C104	1.374 (4)
O11—C12	1.280 (2)	C105—C100	1.374 (4)
O02—C04	1.254 (2)	C105—H105	0.9300
O01—C02	1.281 (2)	C104—C103	1.373 (4)
F12—C11	1.337 (2)	C104—H104	0.9300
O12—C14	1.256 (2)	C100—C101	1.384 (3)
F01—C01	1.326 (2)	C100—C106	1.506 (4)
C13—C12	1.359 (3)	C101—H101	0.9300
C13—C14	1.421 (3)	C103—H103	0.9300
C13—H13	0.90 (2)	C106—H10A	0.9600
C02—C03	1.362 (3)	C106—H10B	0.9600
C02—C01	1.527 (3)	C106—H10C	0.9600
C05—C04	1.492 (3)	C106—H10D	0.9600
C05—H05A	0.9600	C106—H10E	0.9600
C05—H05B	0.9600	C106—H10F	0.9600

O01ⁱ—Zr—O01	142.07 (7)	F13—C11—C12	111.10 (15)
O01ⁱ—Zr—O11	111.77 (5)	F12—C11—C12	112.97 (15)
O01—Zr—O11	80.66 (5)	O12—C14—C13	122.83 (16)
O01ⁱ—Zr—O11ⁱ	80.66 (5)	O12—C14—C15	118.18 (16)
O01—Zr—O11ⁱ	111.77 (5)	C13—C14—C15	118.94 (17)
O11—Zr—O11ⁱ	142.56 (7)	C02—C03—C04	120.48 (17)
O01ⁱ—Zr—O02ⁱ	75.41 (5)	C02—C03—H03	118.7 (13)
O01—Zr—O02ⁱ	141.24 (5)	C04—C03—H03	120.5 (13)
O11—Zr—O02ⁱ	72.91 (5)	O02—C04—C03	122.81 (17)
O11ⁱ—Zr—O02ⁱ	76.85 (5)	O02—C04—C05	118.06 (16)
O01ⁱ—Zr—O02	141.24 (5)	C03—C04—C05	119.11 (16)
O01—Zr—O02	75.41 (5)	C103—C102—C101	120.5 (2)
O11—Zr—O02	76.85 (5)	C103—C102—H102	119.8
O11ⁱ—Zr—O02	72.91 (5)	C101—C102—H102	119.8
O02ⁱ—Zr—O02	71.36 (7)	C14—C15—H15A	109.5
O01ⁱ—Zr—O12ⁱ	76.90 (5)	C14—C15—H15B	109.5
O01—Zr—O12ⁱ	72.46 (5)	H15A—C15—H15B	109.5
O11—Zr—O12ⁱ	140.87 (5)	C14—C15—H15C	109.5
O11ⁱ—Zr—O12ⁱ	75.27 (5)	H15A—C15—H15C	109.5
O02ⁱ—Zr—O12ⁱ	143.29 (5)	H15B—C15—H15C	109.5
O02—Zr—O12ⁱ	121.20 (5)	C104—C105—C100	121.7 (2)
O01ⁱ—Zr—O12	72.46 (5)	C104—C105—H105	119.1
O01—Zr—O12	76.90 (5)	C100—C105—H105	119.1
O11—Zr—O12	75.27 (5)	C103—C104—C105	120.2 (2)
O11ⁱ—Zr—O12	140.87 (5)	C103—C104—H104	119.9
O02ⁱ—Zr—O12	121.20 (5)	C105—C104—H104	119.9
O02—Zr—O12	143.29 (5)	C105—C100—C101	117.6 (2)
O12ⁱ—Zr—O12	71.35 (7)	C105—C100—C106	120.2 (2)
C12—O11—Zr	131.65 (12)	C101—C100—C106	122.2 (2)
C04—O02—Zr	134.45 (12)	C102—C101—C100	120.9 (2)
C02—O01—Zr	131.67 (12)	C102—C101—H101	119.5
C14—O12—Zr	134.72 (12)	C100—C101—H101	119.5
C12—C13—C14	120.47 (17)	C102—C103—C104	119.1 (2)
C12—C13—H13	119.8 (15)	C102—C103—H103	120.5
C14—C13—H13	119.4 (15)	C104—C103—H103	120.5
O01—C02—C03	127.88 (17)	C100—C106—H10A	109.5
O01—C02—C01	112.97 (16)	C100—C106—H10B	109.5
C03—C02—C01	119.15 (16)	H10A—C106—H10B	109.5
C04—C05—H05A	109.5	C100—C106—H10C	109.5
C04—C05—H05B	109.5	H10A—C106—H10C	109.5
H05A—C05—H05B	109.5	H10B—C106—H10C	109.5
C04—C05—H05C	109.5	C100—C106—H10D	109.5
H05A—C05—H05C	109.5	H10A—C106—H10D	141.1
H05B—C05—H05C	109.5	H10B—C106—H10D	56.3
O11—C12—C13	128.12 (17)	H10C—C106—H10D	56.3
O11—C12—C11	112.42 (15)	C100—C106—H10E	109.5
C13—C12—C11	119.40 (16)	H10A—C106—H10E	56.3
F01—C01—F02	107.98 (17)	H10B—C106—H10E	141.1
F01—C01—F03	106.60 (17)	H10C—C106—H10E	56.3
F02—C01—F03	106.60 (15)	H10D—C106—H10E	109.5
F01—C01—C02	111.26 (16)	C100—C106—H10F	109.5
F02—C01—C02	113.01 (16)	H10A—C106—H10F	56.3
F03—C01—C02	111.06 (16)	H10B—C106—H10F	56.3
F11—C11—F13	106.99 (15)	H10C—C106—H10F	141.1
F11—C11—F12	106.91 (15)	H10D—C106—H10F	109.5
F13—C11—F12	106.87 (15)	H10E—C106—H10F	109.5
F11—C11—C12	111.66 (15)

O01ⁱ—Zr—O11—C12	−89.06 (15)	C14—C13—C12—O11	6.1 (3)
O01—Zr—O11—C12	53.60 (14)	C14—C13—C12—C11	−170.90 (17)
O11ⁱ—Zr—O11—C12	167.40 (15)	O01—C02—C01—F01	62.8 (2)
O02ⁱ—Zr—O11—C12	−155.08 (15)	C03—C02—C01—F01	−117.6 (2)
O02—Zr—O11—C12	130.68 (15)	O01—C02—C01—F02	−175.56 (16)
O12ⁱ—Zr—O11—C12	6.91 (18)	C03—C02—C01—F02	4.1 (3)
O12—Zr—O11—C12	−25.20 (14)	O01—C02—C01—F03	−55.8 (2)
O01ⁱ—Zr—O02—C04	−163.83 (14)	C03—C02—C01—F03	123.82 (19)
O01—Zr—O02—C04	28.28 (16)	O11—C12—C11—F11	54.2 (2)
O11—Zr—O02—C04	−55.32 (16)	C13—C12—C11—F11	−128.38 (18)
O11ⁱ—Zr—O02—C04	147.03 (17)	O11—C12—C11—F13	−65.2 (2)
O02ⁱ—Zr—O02—C04	−131.45 (18)	C13—C12—C11—F13	112.26 (19)
O12ⁱ—Zr—O02—C04	86.84 (17)	O11—C12—C11—F12	174.73 (15)
O12—Zr—O02—C04	−13.9 (2)	C13—C12—C11—F12	−7.8 (3)
O01ⁱ—Zr—O01—C02	167.64 (16)	Zr—O12—C14—C13	−17.5 (3)
O11—Zr—O01—C02	54.03 (15)	Zr—O12—C14—C15	165.24 (13)
O11ⁱ—Zr—O01—C02	−89.17 (15)	C12—C13—C14—O12	−6.0 (3)
O02ⁱ—Zr—O01—C02	6.93 (19)	C12—C13—C14—C15	171.22 (18)
O02—Zr—O01—C02	−24.70 (15)	O01—C02—C03—C04	7.0 (3)
O12ⁱ—Zr—O01—C02	−154.76 (16)	C01—C02—C03—C04	−172.56 (17)
O12—Zr—O01—C02	130.96 (16)	Zr—O02—C04—C03	−20.3 (3)
O01ⁱ—Zr—O12—C14	145.52 (17)	Zr—O02—C04—C05	161.44 (13)
O01—Zr—O12—C14	−57.13 (16)	C02—C03—C04—O02	−4.8 (3)
O11—Zr—O12—C14	26.49 (16)	C02—C03—C04—C05	173.47 (18)
O11ⁱ—Zr—O12—C14	−165.63 (15)	C100—C105—C104—C103	0.3 (4)
O02ⁱ—Zr—O12—C14	85.53 (17)	C104—C105—C100—C101	−1.1 (3)
O02—Zr—O12—C14	−15.3 (2)	C104—C105—C100—C106	178.4 (2)
O12ⁱ—Zr—O12—C14	−132.77 (19)	C103—C102—C101—C100	0.0 (4)
Zr—O01—C02—C03	15.3 (3)	C105—C100—C101—C102	1.0 (3)
Zr—O01—C02—C01	−165.07 (12)	C106—C100—C101—C102	−178.5 (2)
Zr—O11—C12—C13	17.1 (3)	C101—C102—C103—C104	−0.9 (4)
Zr—O11—C12—C11	−165.74 (11)	C105—C104—C103—C102	0.8 (4)

Symmetry code: (i) −x+1, y, −z+3/2.

Experimental details

Crystal data
Chemical formula	[Zr(C₅H₄F₃O₂)₄]·C₇H₈
M_r	887.82
Crystal system, space group	Monoclinic, C2/c
Temperature (K)	100
a, b, c (Å)	22.537 (5), 8.054 (5), 22.786 (5)
β (°)	118.383 (5)
V (Å³)	3639 (3)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	0.41
Crystal size (mm)	0.33 × 0.22 × 0.20

Data collection
Diffractometer	Bruker SMART CCD area-detector diffractometer
Absorption correction	Multi-scan (SADABS; Bruker, 1998)
T_min, T_max	0.876, 0.922
No. of measured, independent and observed [I > 2σ(I)] reflections	14897, 3975, 3559
R_int	0.029
(sin θ/λ)_max (Å⁻¹)	0.639

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.029, 0.070, 1.05
No. of reflections	3975
No. of parameters	259
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.50, −0.45

Computer programs: APEX2 (Bruker, 2005), SAINT-Plus (Bruker, 2004), SAINT-Plus and XPREP (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), DIAMOND (Brandenburg & Putz, 2005).

Selected geometric parameters (Å, º) top

Zr—O01	2.1633 (13)	Zr—O02	2.1973 (15)
Zr—O11	2.1679 (13)	Zr—O12	2.2079 (15)

O01ⁱ—Zr—O01	142.07 (7)	O11—Zr—O02	76.85 (5)
O01—Zr—O11	80.66 (5)	O01—Zr—O12	76.90 (5)
O11—Zr—O11ⁱ	142.56 (7)	O11—Zr—O12	75.27 (5)
O01—Zr—O02	75.41 (5)

Symmetry code: (i) −x+1, y, −z+3/2.

Acknowledgements

Financial assistance from the Advanced Metals Initiative (AMI), the Department of Science and Technology (DST) of South Africa, the New Metals Development Network (NMDN) and the South African Nuclear Energy Corporation Limited (Necsa) is gratefully acknowledged. Dr R. Meijboom is acknowledged for his kind assistance in the use of modified Shlenck techniques.

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