metal-organic compounds
The triclinic form of di-μ-aqua-bis[diaquabis(thiocyanato-κN)iron(II)]–1,4-bis(4H-1,2,4-triazol-4-yl)benzene (1/3)
aTianjin Key Laboratory of Structure and Performance for Functional Molecule, Tianjin Normal University, Tianjin 300071, People's Republic of China
*Correspondence e-mail: qsdingbin@yahoo.com.cn
In the title compound, [Fe2(NCS)4(H2O)6]·3C10H8N6, the centrosymmetric dinuclear complex contains two FeII ions bridged by two aqua ligand O atoms, forming a four-membered ring. The slightly distorted octahedral coordination environment of the two FeII ions is completed by two monodentate aqua ligands and two thiocyanate ligands. One of the 1,4-bis(4H-1,2,4-triazol-4-yl)benzene molecules lies across an inversion center. In the crystal, O—H⋯N hydrogen bonds connect the components, forming a two-dimensional network parallel to (011). In addition, π–π stacking interactions involving the benzene and triazole rings, with centroid–centroid distances in the range 3.502 (5)—3.787 (6) Å, connect the two-dimensional hydrogen-bonded network into a three-dimensional network.
Related literature
For details of compounds containing a diiron center, see: Hsu et al. (1999); Zheng et al. (1999); MacMurdo et al. (2000); Yoon et al. (2004). For related multicompent dioxygen dependent enzymes including toluene monooxygenase, see: Sazinsky et al. (2004). For related multicompent dioxygen dependent enzymes including the R2 subunit of ribonucleotide reductase, see: Nordlund & Eklund (1993); Stubbe & Van der Donk (1998). For the monoclinic form of the title compound, see: Liu et al. (2012).
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Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536812026141/lh5483sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812026141/lh5483Isup2.hkl
The compound was synthesized under hydrothermal conditions. A mixture of L (L = 1,4-Bis(4H-1,2,4-triazol-4-yl)benzene) (0.3 mmol, 0.0636 g), FeSO4.7H2O (0.1 mmol, 0.028 g), KSCN (0.2 mmol, 0.019 g) and water (10 ml) was placed in a 25 ml acid digestion bomb and heated at 393 K for two days, then cooled to room temperature over three days. After being washed by 5 ml water twice, colorless block-shaped crystals of the title compound were obtained.
The water H atoms were located in a Fourier difference map and refined subject to an O—H restraint 0.88 (1) Å and an H···H restraint of 1.42 (2) Å. Other H atoms were allowed to ride on their parent atoms with C—H distances of 0.93 Å (Uiso(H) = 1.2Ueq(C)).
The diiron unit, with a carboxylate-rich coordination environment, continues to attract considerable attention due to the enzyme catalysis activity, which occurs in related multicompent dioxygen dependent enzymes, including toluene monooxy-genase (Sazinsky et al., 2004) and the R2 subunit of ribonucleotide reductase (Stubbe & Van der Donk, 1998; Nordlund & Eklund, 1993). With the development of compounds that contain the diiron center, the structure of a series of Fe2(II,II) (MacMurdo et al., 2000), Fe2(III,III) (Zheng et al., 1999) and Fe2(III,IV) (Hsu et al., 1999) complexes with a central Fe2O2 four-membered ring have been obtained. Compared to the chelating to iron atoms with carboxylic oxygen atoms, it is rarely reported that the four-membered center includes both aqua oxygen atoms. In order to explore further details of the coordinated environment of the diiron system, the title complex was synthesized and its
is presented herein.The molecular structure of the title complex is shown in Fig. 1. The dinuclear complex structure comprises two FeII ions related by a crystallographic inversion center and bridged by two aqua oxygen atoms to form a four-membered core. Both FeII ions are in a slightly distorted octahedral coordination environment. The separation between the FeII ions is 3.487 (1) Å, compared to 3.0430 (7) Å reported previously (Yoon et al., 2004) possibly owing to the absence of the carboxylate ligands in the title compound. Moreover, the Fe···Fe distance is comparatively different from that of diiron compounds containing higher valences of iron (MacMurdo et al., 2000; Zheng et al., 1999; Hsu et al., 1999). In the crystal, O—H···N hydrogen bonds connect the components of the structure to form a two-dimensional network parallel to (011) (see Fig. 2). In addition, π···π stacking interactions involving the benzene and triazole rings with centroid to centroid distances in the range 3.502 (5)—3.787 (6) Å connect the two-dimensional hydrogen-bonded network into a three-dimensional network.
For details of compounds containing a diiron center, see: Hsu et al. (1999); Zheng et al. (1999); MacMurdo et al. (2000); Yoon et al. (2004). For related multicompent dioxygen dependent enzymes including toluene monooxy-genase, see: Sazinsky et al. (2004). For related multicompent dioxygen dependent enzymes including the R2 subunit of ribonucleotide reductase, see: Nordlund & Eklund (1993); Stubbe & Van der Donk (1998). For the monoclinic form of the title compound, see: Liu et al. (2012).
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. The molecular structure of the title compound, showing 30% probability displacement ellipsoids. Unlabeled atoms in the dinuclear complex and one of the 1,4-Bis(4H-1,2,4-triazol-4-yl)benzene tri-solvate molecules are related by the symmetry codes (-x+2, -y+1, -z) and (-x+1, -y, -z+1), respectively. | |
Fig. 2. The two-dimensional layered structure of the title complex. Purple Dashed lines indicate donor acceptor distances of the hydrogen bonds. H atoms are not shown. |
[Fe2(NCS)4(H2O)6]·3C10H8N6 | Z = 1 |
Mr = 1088.79 | F(000) = 558 |
Triclinic, P1 | Dx = 1.655 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.8335 (6) Å | Cell parameters from 2875 reflections |
b = 10.9081 (8) Å | θ = 3.0–28.4° |
c = 13.8067 (10) Å | µ = 0.93 mm−1 |
α = 68.999 (1)° | T = 173 K |
β = 84.952 (1)° | Block, colourless |
γ = 83.355 (1)° | 0.18 × 0.14 × 0.13 mm |
V = 1092.62 (14) Å3 |
Bruker APEXII CCD diffractometer | 3827 independent reflections |
Radiation source: fine-focus sealed tube | 3435 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.019 |
φ and ω scans | θmax = 25.0°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −8→9 |
Tmin = 0.851, Tmax = 0.889 | k = −9→12 |
5619 measured reflections | l = −15→16 |
Refinement on F2 | 2 restraints |
Least-squares matrix: full | H-atom parameters constrained |
R[F2 > 2σ(F2)] = 0.031 | w = 1/[σ2(Fo2) + (0.0345P)2 + 0.7404P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.077 | (Δ/σ)max = 0.001 |
S = 1.03 | Δρmax = 0.30 e Å−3 |
3827 reflections | Δρmin = −0.43 e Å−3 |
307 parameters |
[Fe2(NCS)4(H2O)6]·3C10H8N6 | γ = 83.355 (1)° |
Mr = 1088.79 | V = 1092.62 (14) Å3 |
Triclinic, P1 | Z = 1 |
a = 7.8335 (6) Å | Mo Kα radiation |
b = 10.9081 (8) Å | µ = 0.93 mm−1 |
c = 13.8067 (10) Å | T = 173 K |
α = 68.999 (1)° | 0.18 × 0.14 × 0.13 mm |
β = 84.952 (1)° |
Bruker APEXII CCD diffractometer | 3827 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 3435 reflections with I > 2σ(I) |
Tmin = 0.851, Tmax = 0.889 | Rint = 0.019 |
5619 measured reflections |
R[F2 > 2σ(F2)] = 0.031 | 2 restraints |
wR(F2) = 0.077 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.30 e Å−3 |
3827 reflections | Δρmin = −0.43 e Å−3 |
307 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
Fe1 | 0.93995 (4) | 0.61553 (3) | 0.06003 (2) | 0.01245 (10) | |
S1 | 0.94951 (7) | 0.98407 (6) | −0.27085 (4) | 0.01874 (14) | |
S2 | 0.94707 (7) | 0.29730 (6) | 0.41566 (4) | 0.01899 (14) | |
O1 | 1.08753 (19) | 0.72399 (15) | 0.11568 (11) | 0.0168 (3) | |
H1A | 1.1503 | 0.6859 | 0.1662 | 0.025* | |
H1B | 1.1432 | 0.7829 | 0.0721 | 0.025* | |
O2 | 1.17972 (18) | 0.51345 (14) | 0.00652 (10) | 0.0135 (3) | |
H2A | 1.2497 | 0.5774 | −0.0469 | 0.020* | |
H2B | 1.2517 | 0.4605 | 0.0653 | 0.020* | |
O3 | 0.68912 (19) | 0.68356 (15) | 0.09608 (11) | 0.0172 (3) | |
H3A | 0.6264 | 0.7424 | 0.0535 | 0.026* | |
H3B | 0.6237 | 0.6411 | 0.1452 | 0.026* | |
N1 | 0.3803 (2) | 0.43716 (17) | 0.42713 (13) | 0.0149 (4) | |
N2 | 0.4701 (2) | 0.55412 (18) | 0.26843 (13) | 0.0166 (4) | |
N3 | 0.2969 (2) | 0.58853 (19) | 0.28071 (14) | 0.0212 (4) | |
N4 | 0.3748 (2) | 0.05660 (17) | 0.83062 (13) | 0.0133 (4) | |
N5 | 0.4598 (2) | −0.11802 (18) | 0.96406 (13) | 0.0165 (4) | |
N6 | 0.2857 (2) | −0.08517 (18) | 0.97992 (14) | 0.0188 (4) | |
N7 | 0.5005 (2) | 0.19396 (17) | 0.29899 (13) | 0.0116 (4) | |
N8 | 0.5907 (2) | 0.33244 (18) | 0.14775 (13) | 0.0151 (4) | |
N9 | 0.4119 (2) | 0.34901 (17) | 0.15464 (13) | 0.0150 (4) | |
N10 | 0.9418 (2) | 0.76782 (18) | −0.08416 (14) | 0.0164 (4) | |
N11 | 0.9443 (2) | 0.46757 (18) | 0.20753 (14) | 0.0168 (4) | |
C1 | 0.5168 (3) | 0.4650 (2) | 0.35647 (16) | 0.0172 (5) | |
H1 | 0.6307 | 0.4247 | 0.3696 | 0.021* | |
C2 | 0.2474 (3) | 0.5182 (2) | 0.37532 (17) | 0.0207 (5) | |
H2 | 0.1332 | 0.5231 | 0.4041 | 0.025* | |
C3 | 0.3786 (3) | 0.3430 (2) | 0.53126 (16) | 0.0138 (4) | |
C4 | 0.2299 (3) | 0.3324 (2) | 0.59539 (16) | 0.0173 (5) | |
H4 | 0.1291 | 0.3888 | 0.5708 | 0.021* | |
C5 | 0.2281 (3) | 0.2398 (2) | 0.69513 (16) | 0.0159 (5) | |
H5 | 0.1264 | 0.2325 | 0.7390 | 0.019* | |
C6 | 0.3758 (3) | 0.1580 (2) | 0.73034 (15) | 0.0135 (4) | |
C7 | 0.5257 (3) | 0.1709 (2) | 0.66666 (16) | 0.0160 (5) | |
H7 | 0.6275 | 0.1161 | 0.6917 | 0.019* | |
C8 | 0.5268 (3) | 0.2630 (2) | 0.56752 (16) | 0.0159 (5) | |
H8 | 0.6291 | 0.2717 | 0.5241 | 0.019* | |
C9 | 0.5101 (3) | −0.0323 (2) | 0.87559 (16) | 0.0167 (5) | |
H9 | 0.6244 | −0.0314 | 0.8462 | 0.020* | |
C10 | 0.2392 (3) | 0.0185 (2) | 0.89994 (16) | 0.0173 (5) | |
H10 | 0.1260 | 0.0614 | 0.8913 | 0.021* | |
C11 | 0.6395 (3) | 0.2405 (2) | 0.23378 (16) | 0.0146 (5) | |
H11 | 0.7560 | 0.2098 | 0.2493 | 0.017* | |
C12 | 0.3619 (3) | 0.2663 (2) | 0.24462 (16) | 0.0144 (5) | |
H12 | 0.2452 | 0.2573 | 0.2692 | 0.017* | |
C13 | 0.5004 (3) | 0.0950 (2) | 0.40112 (15) | 0.0119 (4) | |
C14 | 0.3452 (3) | 0.0654 (2) | 0.45848 (16) | 0.0147 (5) | |
H14 | 0.2398 | 0.1101 | 0.4297 | 0.018* | |
C15 | 0.6553 (3) | 0.0293 (2) | 0.44258 (16) | 0.0147 (5) | |
H15 | 0.7608 | 0.0493 | 0.4032 | 0.018* | |
C16 | 0.9452 (3) | 0.8577 (2) | −0.16137 (16) | 0.0128 (4) | |
C17 | 0.9453 (3) | 0.3973 (2) | 0.29352 (16) | 0.0139 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Fe1 | 0.01271 (17) | 0.01269 (17) | 0.01021 (16) | −0.00163 (13) | −0.00107 (12) | −0.00164 (13) |
S1 | 0.0169 (3) | 0.0181 (3) | 0.0141 (3) | −0.0007 (2) | −0.0003 (2) | 0.0026 (2) |
S2 | 0.0171 (3) | 0.0201 (3) | 0.0129 (3) | 0.0002 (2) | −0.0008 (2) | 0.0019 (2) |
O1 | 0.0173 (8) | 0.0179 (8) | 0.0124 (7) | −0.0047 (6) | −0.0022 (6) | −0.0008 (6) |
O2 | 0.0135 (7) | 0.0140 (8) | 0.0103 (7) | −0.0012 (6) | −0.0013 (6) | −0.0008 (6) |
O3 | 0.0154 (8) | 0.0180 (8) | 0.0118 (7) | 0.0000 (6) | 0.0011 (6) | 0.0017 (6) |
N1 | 0.0184 (10) | 0.0130 (9) | 0.0108 (9) | −0.0002 (8) | −0.0013 (8) | −0.0015 (7) |
N2 | 0.0207 (10) | 0.0147 (10) | 0.0144 (9) | −0.0022 (8) | −0.0001 (8) | −0.0050 (8) |
N3 | 0.0197 (10) | 0.0221 (11) | 0.0194 (10) | −0.0035 (8) | −0.0049 (8) | −0.0029 (8) |
N4 | 0.0148 (9) | 0.0123 (9) | 0.0118 (8) | −0.0008 (8) | −0.0006 (7) | −0.0033 (7) |
N5 | 0.0194 (10) | 0.0140 (9) | 0.0153 (9) | 0.0001 (8) | −0.0028 (8) | −0.0041 (8) |
N6 | 0.0207 (10) | 0.0175 (10) | 0.0161 (9) | −0.0044 (8) | −0.0018 (8) | −0.0024 (8) |
N7 | 0.0128 (9) | 0.0110 (9) | 0.0100 (8) | −0.0010 (7) | −0.0014 (7) | −0.0023 (7) |
N8 | 0.0150 (9) | 0.0140 (9) | 0.0149 (9) | −0.0017 (8) | −0.0024 (7) | −0.0028 (8) |
N9 | 0.0164 (10) | 0.0130 (9) | 0.0139 (9) | −0.0017 (8) | −0.0032 (7) | −0.0022 (8) |
N10 | 0.0132 (10) | 0.0173 (10) | 0.0171 (9) | 0.0003 (8) | −0.0016 (8) | −0.0042 (8) |
N11 | 0.0143 (10) | 0.0187 (10) | 0.0162 (9) | −0.0023 (8) | −0.0004 (8) | −0.0043 (8) |
C1 | 0.0179 (12) | 0.0184 (12) | 0.0156 (11) | −0.0025 (9) | 0.0015 (9) | −0.0066 (9) |
C2 | 0.0167 (12) | 0.0229 (13) | 0.0179 (11) | −0.0020 (10) | −0.0011 (10) | −0.0014 (10) |
C3 | 0.0172 (11) | 0.0125 (11) | 0.0131 (10) | −0.0031 (9) | −0.0010 (9) | −0.0055 (9) |
C4 | 0.0140 (11) | 0.0176 (12) | 0.0161 (11) | 0.0034 (9) | −0.0016 (9) | −0.0020 (9) |
C5 | 0.0121 (11) | 0.0179 (12) | 0.0150 (10) | −0.0004 (9) | 0.0025 (9) | −0.0034 (9) |
C6 | 0.0178 (11) | 0.0121 (11) | 0.0119 (10) | −0.0026 (9) | −0.0019 (9) | −0.0049 (9) |
C7 | 0.0151 (11) | 0.0154 (11) | 0.0165 (11) | 0.0022 (9) | −0.0026 (9) | −0.0050 (9) |
C8 | 0.0135 (11) | 0.0171 (11) | 0.0159 (11) | −0.0011 (9) | 0.0010 (9) | −0.0050 (9) |
C9 | 0.0182 (12) | 0.0160 (11) | 0.0156 (11) | 0.0008 (9) | −0.0043 (9) | −0.0051 (9) |
C10 | 0.0154 (12) | 0.0182 (12) | 0.0161 (11) | −0.0025 (9) | −0.0014 (9) | −0.0029 (9) |
C11 | 0.0134 (11) | 0.0164 (11) | 0.0130 (10) | −0.0021 (9) | 0.0000 (9) | −0.0040 (9) |
C12 | 0.0149 (11) | 0.0144 (11) | 0.0130 (10) | 0.0001 (9) | −0.0030 (9) | −0.0037 (9) |
C13 | 0.0151 (11) | 0.0104 (10) | 0.0105 (10) | −0.0022 (9) | −0.0026 (8) | −0.0032 (8) |
C14 | 0.0114 (11) | 0.0158 (11) | 0.0153 (10) | 0.0000 (9) | −0.0023 (9) | −0.0036 (9) |
C15 | 0.0125 (11) | 0.0165 (11) | 0.0137 (10) | −0.0018 (9) | 0.0014 (9) | −0.0039 (9) |
C16 | 0.0104 (10) | 0.0146 (10) | 0.0131 (9) | 0.0001 (9) | −0.0005 (8) | −0.0048 (7) |
C17 | 0.0121 (11) | 0.0137 (11) | 0.0148 (9) | −0.0002 (9) | 0.0003 (9) | −0.0041 (8) |
Fe1—N10 | 2.0865 (18) | N7—C13 | 1.436 (3) |
Fe1—N11 | 2.0968 (18) | N8—C11 | 1.304 (3) |
Fe1—O3 | 2.1011 (15) | N8—N9 | 1.391 (3) |
Fe1—O1 | 2.1097 (14) | N9—C12 | 1.305 (3) |
Fe1—O2i | 2.2552 (14) | N10—C16 | 1.162 (3) |
Fe1—O2 | 2.2748 (15) | N11—C17 | 1.160 (3) |
S1—C16 | 1.641 (2) | C1—H1 | 0.9500 |
S2—C17 | 1.648 (2) | C2—H2 | 0.9500 |
O1—H1A | 0.8401 | C3—C8 | 1.384 (3) |
O1—H1B | 0.8401 | C3—C4 | 1.389 (3) |
O2—Fe1i | 2.2552 (14) | C4—C5 | 1.385 (3) |
O2—H2A | 0.9900 | C4—H4 | 0.9500 |
O2—H2B | 0.9900 | C5—C6 | 1.386 (3) |
O3—H3A | 0.8401 | C5—H5 | 0.9500 |
O3—H3B | 0.8401 | C6—C7 | 1.393 (3) |
N1—C2 | 1.357 (3) | C7—C8 | 1.377 (3) |
N1—C1 | 1.366 (3) | C7—H7 | 0.9500 |
N1—C3 | 1.437 (3) | C8—H8 | 0.9500 |
N2—C1 | 1.306 (3) | C9—H9 | 0.9500 |
N2—N3 | 1.377 (3) | C10—H10 | 0.9500 |
N3—C2 | 1.306 (3) | C11—H11 | 0.9500 |
N4—C10 | 1.362 (3) | C12—H12 | 0.9500 |
N4—C9 | 1.377 (3) | C13—C15 | 1.393 (3) |
N4—C6 | 1.430 (3) | C13—C14 | 1.396 (3) |
N5—C9 | 1.305 (3) | C14—C15ii | 1.386 (3) |
N5—N6 | 1.388 (3) | C14—H14 | 0.9500 |
N6—C10 | 1.308 (3) | C15—C14ii | 1.386 (3) |
N7—C11 | 1.372 (3) | C15—H15 | 0.9500 |
N7—C12 | 1.373 (3) | ||
N10—Fe1—N11 | 177.40 (7) | N1—C1—H1 | 124.5 |
N10—Fe1—O3 | 90.67 (6) | N3—C2—N1 | 111.2 (2) |
N11—Fe1—O3 | 89.72 (6) | N3—C2—H2 | 124.4 |
N10—Fe1—O1 | 88.84 (6) | N1—C2—H2 | 124.4 |
N11—Fe1—O1 | 88.55 (6) | C8—C3—C4 | 120.1 (2) |
O3—Fe1—O1 | 101.03 (6) | C8—C3—N1 | 119.39 (19) |
N10—Fe1—O2i | 91.03 (6) | C4—C3—N1 | 120.48 (19) |
N11—Fe1—O2i | 91.56 (6) | C5—C4—C3 | 120.2 (2) |
O3—Fe1—O2i | 87.55 (6) | C5—C4—H4 | 119.9 |
O1—Fe1—O2i | 171.43 (6) | C3—C4—H4 | 119.9 |
N10—Fe1—O2 | 89.61 (6) | C4—C5—C6 | 119.4 (2) |
N11—Fe1—O2 | 90.60 (6) | C4—C5—H5 | 120.3 |
O3—Fe1—O2 | 166.90 (5) | C6—C5—H5 | 120.3 |
O1—Fe1—O2 | 92.07 (6) | C5—C6—C7 | 120.17 (19) |
O2i—Fe1—O2 | 79.35 (5) | C5—C6—N4 | 120.60 (19) |
Fe1—O1—H1A | 120.8 | C7—C6—N4 | 119.19 (19) |
Fe1—O1—H1B | 118.2 | C8—C7—C6 | 120.2 (2) |
H1A—O1—H1B | 106.9 | C8—C7—H7 | 119.9 |
Fe1i—O2—Fe1 | 100.65 (5) | C6—C7—H7 | 119.9 |
Fe1i—O2—H2A | 111.6 | C7—C8—C3 | 119.8 (2) |
Fe1—O2—H2A | 111.6 | C7—C8—H8 | 120.1 |
Fe1i—O2—H2B | 111.6 | C3—C8—H8 | 120.1 |
Fe1—O2—H2B | 111.6 | N5—C9—N4 | 110.8 (2) |
H2A—O2—H2B | 109.4 | N5—C9—H9 | 124.6 |
Fe1—O3—H3A | 124.5 | N4—C9—H9 | 124.6 |
Fe1—O3—H3B | 125.3 | N6—C10—N4 | 111.0 (2) |
H3A—O3—H3B | 106.9 | N6—C10—H10 | 124.5 |
C2—N1—C1 | 103.71 (18) | N4—C10—H10 | 124.5 |
C2—N1—C3 | 128.44 (19) | N8—C11—N7 | 111.06 (19) |
C1—N1—C3 | 127.84 (18) | N8—C11—H11 | 124.5 |
C1—N2—N3 | 106.87 (18) | N7—C11—H11 | 124.5 |
C2—N3—N2 | 107.16 (18) | N9—C12—N7 | 110.95 (19) |
C10—N4—C9 | 104.00 (18) | N9—C12—H12 | 124.5 |
C10—N4—C6 | 128.60 (18) | N7—C12—H12 | 124.5 |
C9—N4—C6 | 127.22 (18) | C15—C13—C14 | 120.34 (19) |
C9—N5—N6 | 107.03 (17) | C15—C13—N7 | 119.82 (19) |
C10—N6—N5 | 107.25 (18) | C14—C13—N7 | 119.84 (18) |
C11—N7—C12 | 103.73 (17) | C15ii—C14—C13 | 120.01 (19) |
C11—N7—C13 | 128.06 (17) | C15ii—C14—H14 | 120.0 |
C12—N7—C13 | 128.19 (18) | C13—C14—H14 | 120.0 |
C11—N8—N9 | 107.13 (17) | C14ii—C15—C13 | 119.7 (2) |
C12—N9—N8 | 107.12 (17) | C14ii—C15—H15 | 120.2 |
C16—N10—Fe1 | 175.78 (17) | C13—C15—H15 | 120.2 |
C17—N11—Fe1 | 172.21 (17) | N10—C16—S1 | 179.6 (2) |
N2—C1—N1 | 111.1 (2) | N11—C17—S2 | 179.9 (3) |
N2—C1—H1 | 124.5 | ||
N10—Fe1—O2—Fe1i | −91.12 (6) | C4—C5—C6—N4 | −176.34 (18) |
N11—Fe1—O2—Fe1i | 91.48 (6) | C10—N4—C6—C5 | 5.2 (3) |
O3—Fe1—O2—Fe1i | 0.2 (3) | C9—N4—C6—C5 | 179.4 (2) |
O1—Fe1—O2—Fe1i | −179.95 (5) | C10—N4—C6—C7 | −172.6 (2) |
O2i—Fe1—O2—Fe1i | 0.0 | C9—N4—C6—C7 | 1.7 (3) |
C1—N2—N3—C2 | −0.2 (2) | C5—C6—C7—C8 | −1.5 (3) |
C9—N5—N6—C10 | 0.3 (2) | N4—C6—C7—C8 | 176.30 (18) |
C11—N8—N9—C12 | 0.1 (2) | C6—C7—C8—C3 | 0.1 (3) |
N11—Fe1—N10—C16 | −18 (3) | C4—C3—C8—C7 | 1.4 (3) |
O3—Fe1—N10—C16 | 80 (2) | N1—C3—C8—C7 | −178.93 (18) |
O1—Fe1—N10—C16 | −21 (2) | N6—N5—C9—N4 | −0.7 (2) |
O2i—Fe1—N10—C16 | 168 (2) | C10—N4—C9—N5 | 0.8 (2) |
O2—Fe1—N10—C16 | −113 (2) | C6—N4—C9—N5 | −174.65 (18) |
N10—Fe1—N11—C17 | 34 (2) | N5—N6—C10—N4 | 0.2 (2) |
O3—Fe1—N11—C17 | −64.2 (12) | C9—N4—C10—N6 | −0.6 (2) |
O1—Fe1—N11—C17 | 36.9 (12) | C6—N4—C10—N6 | 174.75 (18) |
O2i—Fe1—N11—C17 | −151.7 (12) | N9—N8—C11—N7 | 0.0 (2) |
O2—Fe1—N11—C17 | 128.9 (12) | C12—N7—C11—N8 | 0.0 (2) |
N3—N2—C1—N1 | 0.7 (2) | C13—N7—C11—N8 | −178.74 (18) |
C2—N1—C1—N2 | −0.9 (2) | N8—N9—C12—N7 | −0.1 (2) |
C3—N1—C1—N2 | 178.46 (18) | C11—N7—C12—N9 | 0.1 (2) |
N2—N3—C2—N1 | −0.3 (3) | C13—N7—C12—N9 | 178.79 (18) |
C1—N1—C2—N3 | 0.7 (2) | C11—N7—C13—C15 | −3.3 (3) |
C3—N1—C2—N3 | −178.62 (19) | C12—N7—C13—C15 | 178.31 (19) |
C2—N1—C3—C8 | 175.7 (2) | C11—N7—C13—C14 | 176.49 (19) |
C1—N1—C3—C8 | −3.5 (3) | C12—N7—C13—C14 | −1.9 (3) |
C2—N1—C3—C4 | −4.6 (3) | C15—C13—C14—C15ii | 0.3 (3) |
C1—N1—C3—C4 | 176.2 (2) | N7—C13—C14—C15ii | −179.45 (18) |
C8—C3—C4—C5 | −1.4 (3) | C14—C13—C15—C14ii | −0.3 (3) |
N1—C3—C4—C5 | 178.86 (19) | N7—C13—C15—C14ii | 179.45 (18) |
C3—C4—C5—C6 | 0.0 (3) | Fe1—N10—C16—S1 | −174 (100) |
C4—C5—C6—C7 | 1.4 (3) | Fe1—N11—C17—S2 | −123 (100) |
Symmetry codes: (i) −x+2, −y+1, −z; (ii) −x+1, −y, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···N3iii | 0.84 | 1.94 | 2.784 (2) | 177 |
O1—H1B···N6iv | 0.84 | 1.94 | 2.774 (2) | 175 |
O2—H2A···N8i | 0.99 | 1.86 | 2.838 (2) | 168 |
O2—H2B···N9iii | 0.99 | 1.85 | 2.824 (2) | 168 |
O3—H3A···N5v | 0.84 | 2.01 | 2.843 (2) | 174 |
O3—H3B···N2 | 0.84 | 2.00 | 2.834 (2) | 174 |
Symmetry codes: (i) −x+2, −y+1, −z; (iii) x+1, y, z; (iv) x+1, y+1, z−1; (v) x, y+1, z−1. |
Experimental details
Crystal data | |
Chemical formula | [Fe2(NCS)4(H2O)6]·3C10H8N6 |
Mr | 1088.79 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 173 |
a, b, c (Å) | 7.8335 (6), 10.9081 (8), 13.8067 (10) |
α, β, γ (°) | 68.999 (1), 84.952 (1), 83.355 (1) |
V (Å3) | 1092.62 (14) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 0.93 |
Crystal size (mm) | 0.18 × 0.14 × 0.13 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.851, 0.889 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5619, 3827, 3435 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.077, 1.03 |
No. of reflections | 3827 |
No. of parameters | 307 |
No. of restraints | 2 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.30, −0.43 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999), publCIF (Westrip, 2010).
Fe1—N10 | 2.0865 (18) | Fe1—O1 | 2.1097 (14) |
Fe1—N11 | 2.0968 (18) | Fe1—O2i | 2.2552 (14) |
Fe1—O3 | 2.1011 (15) | Fe1—O2 | 2.2748 (15) |
Symmetry code: (i) −x+2, −y+1, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···N3ii | 0.84 | 1.94 | 2.784 (2) | 176.7 |
O1—H1B···N6iii | 0.84 | 1.94 | 2.774 (2) | 175.4 |
O2—H2A···N8i | 0.99 | 1.86 | 2.838 (2) | 168.4 |
O2—H2B···N9ii | 0.99 | 1.85 | 2.824 (2) | 167.9 |
O3—H3A···N5iv | 0.84 | 2.01 | 2.843 (2) | 174.2 |
O3—H3B···N2 | 0.84 | 2.00 | 2.834 (2) | 174.1 |
Symmetry codes: (i) −x+2, −y+1, −z; (ii) x+1, y, z; (iii) x+1, y+1, z−1; (iv) x, y+1, z−1. |
Acknowledgements
This work was supported financially by Tianjin Educational Committee (20090504, 20110311) and Tianjin Normal University (1E0402B).
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
The diiron unit, with a carboxylate-rich coordination environment, continues to attract considerable attention due to the enzyme catalysis activity, which occurs in related multicompent dioxygen dependent enzymes, including toluene monooxy-genase (Sazinsky et al., 2004) and the R2 subunit of ribonucleotide reductase (Stubbe & Van der Donk, 1998; Nordlund & Eklund, 1993). With the development of compounds that contain the diiron center, the structure of a series of Fe2(II,II) (MacMurdo et al., 2000), Fe2(III,III) (Zheng et al., 1999) and Fe2(III,IV) (Hsu et al., 1999) complexes with a central Fe2O2 four-membered ring have been obtained. Compared to the chelating to iron atoms with carboxylic oxygen atoms, it is rarely reported that the four-membered center includes both aqua oxygen atoms. In order to explore further details of the coordinated environment of the diiron system, the title complex was synthesized and its crystal structure is presented herein.
The molecular structure of the title complex is shown in Fig. 1. The dinuclear complex structure comprises two FeII ions related by a crystallographic inversion center and bridged by two aqua oxygen atoms to form a four-membered core. Both FeII ions are in a slightly distorted octahedral coordination environment. The separation between the FeII ions is 3.487 (1) Å, compared to 3.0430 (7) Å reported previously (Yoon et al., 2004) possibly owing to the absence of the carboxylate ligands in the title compound. Moreover, the Fe···Fe distance is comparatively different from that of diiron compounds containing higher valences of iron (MacMurdo et al., 2000; Zheng et al., 1999; Hsu et al., 1999). In the crystal, O—H···N hydrogen bonds connect the components of the structure to form a two-dimensional network parallel to (011) (see Fig. 2). In addition, π···π stacking interactions involving the benzene and triazole rings with centroid to centroid distances in the range 3.502 (5)—3.787 (6) Å connect the two-dimensional hydrogen-bonded network into a three-dimensional network.