metal-organic compounds
Retracted: {μ-6,6′-Dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}-μ-nitrato-dinitratoeuropium(III)zinc(II)
aJiangXi Province Key Laboratory of Coordination Chemistry, College of Chemistry & Chemical Engineering, JingGangShan University, 343009 Ji'an, JiangXi, People's Republic of China, and bCollege of Education, JingGangShan University, 343009 Ji'an, JiangXi, People's Republic of China
*Correspondence e-mail: ysui@163.com
In the title heteronuclear ZnII–EuIII complex [systematic name: {6,6′-dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato-κ4O1,O1′,O6,O6′:2κ4O1,N,N′,O1′}-μ-nitrato-1:2κ2O:O′-dinitrato-1κ4O,O′-europium(III)zinc(II)], [EuZn(C18H18N2O4)(NO3)3], with the hexadentate Schiff base compartmental ligand N,N′-bis(3-methoxysalicylidene)ethylenediamine (H2L), the Eu and Zn atoms are triply bridged by two phenolate O atoms of the Schiff base ligand and one nitrate ion. The five-coordinate Zn atom is in a square-pyramidal geometry with the donor centers of two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The EuIII center has a ninefold coordination environment of O atoms, involving the phenolate O atoms, two methoxy O atoms, two O atoms from two nitrate ions and one from the bridging nitrate ion. Weak intermolecular C—H⋯O interactions generate a two-dimensional double-layer structure.
Related literature
For related literature, see: Baggio et al. (2000); Caravan et al. (1999); Edder et al. (2000); Knoer et al. (2005); Sui et al. (2006, 2007).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell APEX2; data reduction: APEX2; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: APEX2; software used to prepare material for publication: APEX2 and publCIF (Westrip, 2007).
Supporting information
https://doi.org/10.1107/S160053680706151X/at2500sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053680706151X/at2500Isup2.hkl
H2L was prepared by the 2:1 condensation of 3-methoxysalicylaldehyde and ethylenediamine in methanol. Complex (I) was obtained by the treatment of zinc(II) acetate dihydrate (0.188 g, 1 mmol) with H2L(0.328 g, 1 mmol) in methanol solution (80 ml) under reflux for 3 h and then for another 3 h after the addition of europium(III) nitrate hexahydrate (0.446 g, 1 mmol). The reaction mixture was cooled and the resulting precipitate was filtered off, washed with diethyl ether and dried in vacuo. Single crystals of (I) suitable for X-ray analysis were obtained by slow evaporation at room temperature of a methanol solution. Analysis calculated for C18H18EuN5O13Zn: C 29.63, H 2.49, Eu 20.82, N 9.60,Zn 8.96%; found: C 29.58, H 2.44, Eu 21.00, N 9.73, Zn 8.86%. IR(KBr, cm-1): 1640 (C=N), 1386,1490 (nitrate).
The H atoms were positioned geometrically and treated as riding on their parent atoms, with C—H distances of 0.97 (methylene), 0.96 Å (methyl) and 0.93 Å (aromaticmethyl), and with Uiso(H) = 1.5Ueq(C) for methyl H atoms and 1.2Ueq(C) for other H atoms.
The potential applications of trivalent lanthanide complexes as contrast agent for
and stains for fluorescence imaging have prompted considerable interest in the preparation, magnetic and optical properties of 3 d-4f hetorometallic dinuclear complexes (Baggio et al., 2000; Caravan et al., 1999; Edder et al., 2000; Knoer et al., 2005). As part of our investigations into the structure and applications of 3 d-4f hetorometallic Schiff base complexes(Sui et al. 2006; Sui et al. 2007), we report here the synthesis and X-ray analysis of the title complex, (I), a new ZnII—EuIII complex with salen-type Schiff base N,N'-bis(3-methoxysalicylidene) ethylenediamine(H2L).Complex (I) crystallizes in the
P21/n, with zinc and europium triply bridged by two phenolate O atoms provided by the Schiff base ligand and one nitrate ion. The inner salen-type cavity is occupied by zinc(II), while europium(III) is present in the open and larger portion of the dinucleating compartmental Schiff base ligand.The EuIII center has a nonacoordination environment of O atoms, involving the phenolate O atoms, two methoxy O atoms, two O atoms from two nitrate ions and one from the bridging nitrate ion. The four kinds of Eu—O bond distances are significantly different, the longest being the Eu—O(methoxy) separations and the shortest being the Eu—O(phenolate) and Eu—O5(bridging nitrate).
The ZnII is in a square-pyramidal geometry and is five-coordinated by two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The Zn atom is 0.6073 (3)Å above the mean N2O2 plane with an average deviation from the plane of 0.0353 (4) Å, which construct the bottom of square-pyramid. The Zn—O6 (bridging nitrate) separation is 1.971 (4)Å and the angles of this Zn—O vector with the Zn—N or Zn—O bonds lie between 101.7 (5)° and 112.7 (6)°, which suggesting that the ZnII is in a slightly distorted square-pyramidal conformation.
Adjacent molecules are held together by weak interactions (C8—H8A···O13i = 3.442 (9) and C12—H12···O11ii = 3.406 (8); symmetry codes: (i) 1 - x, -y, -z; (ii) 1/2 + x, 1/2 - y, -1/2 + z). These link the molecules into a two-dimensional double-layer structure (Fig 2).
For related literature, see: Baggio et al. (2000); Caravan et al. (1999); Edder et al. (2000); Knoer et al. (2005); Sui et al. (2006, 2007).
Data collection: APEX2 (Bruker, 2004); cell
APEX2 (Bruker, 2004); data reduction: APEX2 (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: APEX2 (Bruker, 2004); software used to prepare material for publication: APEX2 and publCIF (Westrip, 2007).Fig. 1. The molecular structure of (I), showing 30% probability displacement ellipsoids. | |
Fig. 2. The packing diagram of (I), viewed along the b axis; hydrogen bonds are shown as dashed lines. |
[EuZn(C18H18N2O4)(NO3)3] | F(000) = 1432 |
Mr = 729.70 | Dx = 1.882 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 7701 reflections |
a = 10.6576 (13) Å | θ = 1.9–28.2° |
b = 16.460 (2) Å | µ = 3.42 mm−1 |
c = 14.8760 (18) Å | T = 293 K |
β = 99.253 (2)° | Block, yellow |
V = 2575.7 (5) Å3 | 0.22 × 0.21 × 0.13 mm |
Z = 4 |
Bruker APEXII area-detector diffractometer | 6166 independent reflections |
Radiation source: fine-focus sealed tube | 4469 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
φ and ω scan | θmax = 28.2°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | h = −14→13 |
Tmin = 0.520, Tmax = 0.665 | k = −21→21 |
19080 measured reflections | l = −19→19 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.041 | H-atom parameters constrained |
wR(F2) = 0.137 | w = 1/[σ2(Fo2) + (0.095P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.00 | (Δ/σ)max = 0.001 |
6166 reflections | Δρmax = 1.01 e Å−3 |
346 parameters | Δρmin = −1.34 e Å−3 |
1 restraint | Extinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0023 (3) |
[EuZn(C18H18N2O4)(NO3)3] | V = 2575.7 (5) Å3 |
Mr = 729.70 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 10.6576 (13) Å | µ = 3.42 mm−1 |
b = 16.460 (2) Å | T = 293 K |
c = 14.8760 (18) Å | 0.22 × 0.21 × 0.13 mm |
β = 99.253 (2)° |
Bruker APEXII area-detector diffractometer | 6166 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2004) | 4469 reflections with I > 2σ(I) |
Tmin = 0.520, Tmax = 0.665 | Rint = 0.029 |
19080 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 1 restraint |
wR(F2) = 0.137 | H-atom parameters constrained |
S = 1.00 | Δρmax = 1.01 e Å−3 |
6166 reflections | Δρmin = −1.34 e Å−3 |
346 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 | ||
Eu1 | 0.63900 (2) | 0.108878 (15) | 0.274156 (15) | 0.04120 (12) | |
Zn1 | 0.78031 (6) | 0.03491 (4) | 0.11111 (4) | 0.05380 (19) | |
N1 | 0.7500 (5) | −0.0694 (3) | 0.0378 (3) | 0.0606 (12) | |
O12 | 0.4368 (5) | 0.1271 (3) | 0.1789 (3) | 0.0741 (13) | |
O1 | 0.6479 (4) | −0.0006 (2) | 0.1867 (3) | 0.0622 (10) | |
O3 | 0.5081 (4) | −0.0172 (3) | 0.3054 (3) | 0.0632 (11) | |
O9 | 0.7155 (4) | 0.1980 (3) | 0.3991 (3) | 0.0705 (12) | |
O8 | 0.6712 (5) | 0.0748 (3) | 0.4353 (3) | 0.0741 (13) | |
N4 | 0.7205 (6) | 0.1408 (4) | 0.4622 (4) | 0.0751 (16) | |
C1 | 0.5860 (5) | −0.0710 (3) | 0.1821 (4) | 0.0532 (13) | |
C4 | 0.4554 (7) | −0.2156 (5) | 0.1893 (6) | 0.088 (2) | |
H4 | 0.4132 | −0.2647 | 0.1927 | 0.105* | |
C2 | 0.5091 (6) | −0.0829 (4) | 0.2476 (4) | 0.0569 (13) | |
N3 | 0.3827 (5) | 0.1566 (4) | 0.2423 (4) | 0.0778 (17) | |
C6 | 0.5955 (6) | −0.1324 (4) | 0.1176 (5) | 0.0616 (15) | |
C18 | 0.4310 (7) | −0.0261 (5) | 0.3785 (4) | 0.079 (2) | |
H18A | 0.3462 | −0.0420 | 0.3527 | 0.118* | |
H18B | 0.4284 | 0.0248 | 0.4097 | 0.118* | |
H18C | 0.4681 | −0.0668 | 0.4208 | 0.118* | |
O10 | 0.7682 (7) | 0.1548 (4) | 0.5388 (3) | 0.128 (3) | |
C3 | 0.4432 (6) | −0.1548 (4) | 0.2542 (5) | 0.0734 (18) | |
H3 | 0.3932 | −0.1626 | 0.2993 | 0.088* | |
C7 | 0.6722 (6) | −0.1262 (4) | 0.0438 (4) | 0.0611 (15) | |
H7 | 0.6627 | −0.1663 | −0.0008 | 0.073* | |
O11 | 0.4523 (4) | 0.1616 (3) | 0.3198 (3) | 0.0737 (13) | |
C5 | 0.5259 (7) | −0.2051 (4) | 0.1224 (5) | 0.0748 (18) | |
H5 | 0.5289 | −0.2459 | 0.0795 | 0.090* | |
O6 | 0.9413 (4) | 0.0296 (3) | 0.1972 (3) | 0.0668 (11) | |
O4 | 0.6363 (4) | 0.2606 (3) | 0.2286 (3) | 0.0646 (11) | |
O2 | 0.7090 (4) | 0.1414 (2) | 0.1447 (3) | 0.0608 (10) | |
O5 | 0.8463 (4) | 0.0763 (4) | 0.3096 (3) | 0.0778 (13) | |
N2 | 0.8025 (5) | 0.0827 (4) | −0.0125 (3) | 0.0618 (12) | |
N5 | 0.9391 (6) | 0.0506 (4) | 0.2778 (4) | 0.0844 (17) | |
C8 | 0.8228 (6) | −0.0642 (5) | −0.0385 (4) | 0.0700 (17) | |
H8A | 0.7942 | −0.1060 | −0.0831 | 0.084* | |
H8B | 0.9124 | −0.0728 | −0.0163 | 0.084* | |
C15 | 0.6903 (6) | 0.2813 (4) | 0.1541 (4) | 0.0577 (14) | |
C16 | 0.7293 (5) | 0.2124 (4) | 0.1086 (4) | 0.0535 (13) | |
C10 | 0.8045 (6) | 0.1575 (4) | −0.0319 (4) | 0.0660 (16) | |
H10 | 0.8243 | 0.1710 | −0.0887 | 0.079* | |
O13 | 0.2748 (6) | 0.1790 (6) | 0.2304 (5) | 0.141 (3) | |
C11 | 0.7783 (6) | 0.2248 (4) | 0.0271 (4) | 0.0625 (15) | |
C9 | 0.8027 (7) | 0.0198 (5) | −0.0826 (4) | 0.0754 (19) | |
H9A | 0.8700 | 0.0308 | −0.1177 | 0.090* | |
H9B | 0.7223 | 0.0208 | −0.1239 | 0.090* | |
C17 | 0.5747 (8) | 0.3264 (4) | 0.2710 (5) | 0.083 (2) | |
H17A | 0.6329 | 0.3710 | 0.2841 | 0.125* | |
H17B | 0.5499 | 0.3073 | 0.3265 | 0.125* | |
H17C | 0.5007 | 0.3443 | 0.2301 | 0.125* | |
C14 | 0.7069 (7) | 0.3593 (4) | 0.1239 (4) | 0.0667 (16) | |
H14 | 0.6840 | 0.4043 | 0.1555 | 0.080* | |
C12 | 0.7926 (7) | 0.3043 (4) | −0.0030 (4) | 0.0739 (19) | |
H12 | 0.8254 | 0.3128 | −0.0565 | 0.089* | |
C13 | 0.7599 (8) | 0.3683 (5) | 0.0435 (5) | 0.079 (2) | |
H13 | 0.7724 | 0.4203 | 0.0221 | 0.095* | |
O7 | 1.0692 (8) | 0.0412 (5) | 0.3486 (5) | 0.156 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Eu1 | 0.04652 (18) | 0.04350 (18) | 0.03697 (16) | −0.00126 (10) | 0.01698 (11) | −0.00322 (9) |
Zn1 | 0.0580 (4) | 0.0561 (4) | 0.0510 (4) | 0.0004 (3) | 0.0200 (3) | −0.0042 (3) |
N1 | 0.061 (3) | 0.067 (3) | 0.057 (3) | −0.003 (3) | 0.018 (2) | −0.017 (2) |
O12 | 0.065 (3) | 0.099 (4) | 0.061 (3) | 0.004 (2) | 0.017 (2) | −0.013 (2) |
O1 | 0.073 (3) | 0.055 (2) | 0.066 (2) | −0.014 (2) | 0.033 (2) | −0.0140 (19) |
O3 | 0.071 (3) | 0.066 (3) | 0.059 (2) | −0.010 (2) | 0.029 (2) | −0.001 (2) |
O9 | 0.088 (3) | 0.063 (3) | 0.062 (3) | −0.012 (2) | 0.018 (2) | −0.002 (2) |
O8 | 0.100 (4) | 0.070 (3) | 0.055 (2) | −0.023 (3) | 0.021 (2) | −0.002 (2) |
N4 | 0.098 (4) | 0.083 (4) | 0.048 (3) | −0.029 (4) | 0.026 (3) | −0.009 (3) |
C1 | 0.052 (3) | 0.046 (3) | 0.063 (3) | 0.000 (2) | 0.013 (3) | 0.000 (3) |
C4 | 0.076 (5) | 0.068 (5) | 0.125 (7) | −0.027 (4) | 0.034 (5) | −0.017 (4) |
C2 | 0.055 (3) | 0.055 (3) | 0.061 (3) | −0.001 (3) | 0.009 (3) | −0.001 (3) |
N3 | 0.058 (3) | 0.104 (5) | 0.075 (4) | 0.007 (3) | 0.022 (3) | −0.022 (3) |
C6 | 0.061 (4) | 0.053 (3) | 0.072 (4) | 0.005 (3) | 0.013 (3) | −0.005 (3) |
C18 | 0.088 (5) | 0.092 (5) | 0.067 (4) | −0.013 (4) | 0.043 (4) | 0.004 (3) |
O10 | 0.178 (7) | 0.145 (6) | 0.054 (3) | −0.071 (5) | −0.007 (4) | 0.002 (3) |
C3 | 0.062 (4) | 0.072 (5) | 0.090 (5) | −0.010 (3) | 0.024 (4) | 0.008 (4) |
C7 | 0.061 (4) | 0.062 (4) | 0.060 (4) | 0.004 (3) | 0.010 (3) | −0.015 (3) |
O11 | 0.073 (3) | 0.097 (4) | 0.055 (2) | 0.000 (2) | 0.022 (2) | −0.020 (2) |
C5 | 0.075 (4) | 0.054 (4) | 0.098 (5) | −0.009 (3) | 0.019 (4) | −0.018 (3) |
O6 | 0.060 (2) | 0.074 (3) | 0.067 (2) | 0.002 (2) | 0.010 (2) | −0.005 (2) |
O4 | 0.088 (3) | 0.054 (2) | 0.058 (2) | 0.008 (2) | 0.029 (2) | 0.0014 (18) |
O2 | 0.079 (3) | 0.050 (2) | 0.060 (2) | 0.008 (2) | 0.034 (2) | 0.0059 (18) |
O5 | 0.058 (3) | 0.116 (4) | 0.061 (3) | 0.007 (3) | 0.012 (2) | −0.015 (3) |
N2 | 0.061 (3) | 0.076 (4) | 0.053 (3) | 0.002 (3) | 0.019 (2) | 0.003 (2) |
N5 | 0.082 (4) | 0.091 (5) | 0.081 (3) | −0.001 (3) | 0.014 (3) | −0.018 (3) |
C8 | 0.065 (4) | 0.087 (5) | 0.064 (4) | 0.002 (3) | 0.028 (3) | −0.017 (3) |
C15 | 0.064 (3) | 0.050 (3) | 0.060 (3) | −0.003 (3) | 0.012 (3) | 0.003 (3) |
C16 | 0.057 (3) | 0.053 (3) | 0.053 (3) | −0.003 (3) | 0.013 (2) | 0.006 (2) |
C10 | 0.067 (4) | 0.077 (5) | 0.059 (3) | −0.002 (3) | 0.027 (3) | 0.011 (3) |
O13 | 0.070 (4) | 0.221 (9) | 0.131 (5) | 0.045 (4) | 0.010 (4) | −0.060 (5) |
C11 | 0.062 (4) | 0.064 (4) | 0.065 (4) | −0.007 (3) | 0.019 (3) | 0.001 (3) |
C9 | 0.076 (4) | 0.100 (5) | 0.053 (3) | 0.013 (4) | 0.018 (3) | −0.009 (3) |
C17 | 0.108 (6) | 0.059 (4) | 0.088 (5) | 0.013 (4) | 0.030 (4) | −0.009 (3) |
C14 | 0.080 (4) | 0.047 (3) | 0.072 (4) | −0.001 (3) | 0.008 (3) | 0.008 (3) |
C12 | 0.089 (5) | 0.075 (5) | 0.061 (4) | −0.012 (4) | 0.022 (3) | 0.019 (3) |
C13 | 0.102 (6) | 0.067 (4) | 0.065 (4) | −0.007 (4) | 0.006 (4) | 0.019 (3) |
O7 | 0.124 (6) | 0.179 (9) | 0.149 (6) | 0.008 (5) | −0.029 (5) | −0.024 (5) |
Eu1—O1 | 2.234 (4) | C18—H18A | 0.9600 |
Eu1—O2 | 2.239 (4) | C18—H18B | 0.9600 |
Eu1—O3 | 2.584 (4) | C18—H18C | 0.9600 |
Eu1—O4 | 2.587 (4) | C3—H3 | 0.9300 |
Eu1—O5 | 2.252 (5) | C7—H7 | 0.9300 |
Eu1—O8 | 2.432 (4) | C5—H5 | 0.9300 |
Eu1—O9 | 2.405 (4) | O6—N5 | 1.251 (7) |
Eu1—O11 | 2.368 (4) | O4—C15 | 1.371 (7) |
Eu1—O12 | 2.400 (5) | O4—C17 | 1.462 (7) |
Zn1—O1 | 2.027 (4) | O2—C16 | 1.319 (7) |
Zn1—O2 | 2.005 (4) | O5—N5 | 1.238 (7) |
Zn1—O6 | 1.971 (4) | N2—C10 | 1.265 (9) |
Zn1—N1 | 2.032 (5) | N2—C9 | 1.471 (8) |
Zn1—N2 | 2.048 (5) | N5—O7 | 1.607 (9) |
N1—C7 | 1.262 (8) | C8—C9 | 1.531 (10) |
N1—C8 | 1.477 (7) | C8—H8A | 0.9700 |
O12—N3 | 1.278 (6) | C8—H8B | 0.9700 |
O1—C1 | 1.329 (7) | C15—C14 | 1.381 (8) |
O3—C2 | 1.383 (7) | C15—C16 | 1.417 (8) |
O3—C18 | 1.472 (6) | C16—C11 | 1.409 (8) |
O9—N4 | 1.324 (7) | C10—C11 | 1.468 (9) |
O8—N4 | 1.245 (7) | C10—H10 | 0.9300 |
N4—O10 | 1.194 (7) | C11—C12 | 1.399 (9) |
C1—C2 | 1.385 (8) | C9—H9A | 0.9700 |
C1—C6 | 1.408 (8) | C9—H9B | 0.9700 |
C4—C5 | 1.351 (10) | C17—H17A | 0.9600 |
C4—C3 | 1.410 (10) | C17—H17B | 0.9600 |
C4—H4 | 0.9300 | C17—H17C | 0.9600 |
C2—C3 | 1.388 (9) | C14—C13 | 1.411 (10) |
N3—O13 | 1.194 (7) | C14—H14 | 0.9300 |
N3—O11 | 1.269 (7) | C12—C13 | 1.336 (10) |
C6—C5 | 1.416 (9) | C12—H12 | 0.9300 |
C6—C7 | 1.475 (9) | C13—H13 | 0.9300 |
O1—Eu1—O2 | 68.93 (14) | C1—C6—C5 | 118.5 (6) |
O1—Eu1—O5 | 79.18 (17) | C1—C6—C7 | 124.5 (6) |
O2—Eu1—O5 | 78.96 (16) | C5—C6—C7 | 117.0 (6) |
O1—Eu1—O11 | 125.39 (15) | O3—C18—H18A | 109.5 |
O2—Eu1—O11 | 124.77 (16) | O3—C18—H18B | 109.5 |
O5—Eu1—O11 | 149.10 (15) | H18A—C18—H18B | 109.5 |
O1—Eu1—O12 | 82.82 (16) | O3—C18—H18C | 109.5 |
O2—Eu1—O12 | 81.57 (16) | H18A—C18—H18C | 109.5 |
O5—Eu1—O12 | 157.19 (16) | H18B—C18—H18C | 109.5 |
O11—Eu1—O12 | 53.67 (15) | C2—C3—C4 | 117.0 (6) |
O1—Eu1—O9 | 154.35 (16) | C2—C3—H3 | 121.5 |
O2—Eu1—O9 | 113.64 (16) | C4—C3—H3 | 121.5 |
O5—Eu1—O9 | 76.50 (17) | N1—C7—C6 | 123.6 (5) |
O11—Eu1—O9 | 75.57 (15) | N1—C7—H7 | 118.2 |
O12—Eu1—O9 | 122.73 (16) | C6—C7—H7 | 118.2 |
O1—Eu1—O8 | 112.04 (16) | N3—O11—Eu1 | 96.3 (3) |
O2—Eu1—O8 | 152.78 (17) | C4—C5—C6 | 120.2 (6) |
O5—Eu1—O8 | 74.72 (17) | C4—C5—H5 | 119.9 |
O11—Eu1—O8 | 78.12 (17) | C6—C5—H5 | 119.9 |
O12—Eu1—O8 | 125.60 (17) | N5—O6—Zn1 | 117.6 (4) |
O9—Eu1—O8 | 53.30 (15) | C15—O4—C17 | 116.1 (5) |
O1—Eu1—O3 | 62.07 (13) | C15—O4—Eu1 | 117.6 (3) |
O2—Eu1—O3 | 127.64 (14) | C17—O4—Eu1 | 126.1 (4) |
O5—Eu1—O3 | 107.70 (18) | C16—O2—Zn1 | 125.4 (3) |
O11—Eu1—O3 | 74.94 (15) | C16—O2—Eu1 | 131.4 (4) |
O12—Eu1—O3 | 75.38 (16) | Zn1—O2—Eu1 | 101.39 (17) |
O9—Eu1—O3 | 118.44 (13) | N5—O5—Eu1 | 143.8 (4) |
O8—Eu1—O3 | 68.39 (14) | C10—N2—C9 | 121.4 (5) |
O1—Eu1—O4 | 128.75 (13) | C10—N2—Zn1 | 126.0 (4) |
O2—Eu1—O4 | 62.29 (14) | C9—N2—Zn1 | 112.3 (4) |
O5—Eu1—O4 | 105.10 (18) | O5—N5—O6 | 126.8 (6) |
O11—Eu1—O4 | 75.33 (16) | O5—N5—O7 | 116.2 (6) |
O12—Eu1—O4 | 75.71 (16) | O6—N5—O7 | 117.0 (6) |
O9—Eu1—O4 | 66.55 (14) | N1—C8—C9 | 109.1 (5) |
O8—Eu1—O4 | 118.38 (15) | N1—C8—H8A | 109.9 |
O3—Eu1—O4 | 147.03 (14) | C9—C8—H8A | 109.9 |
O6—Zn1—O2 | 101.66 (18) | N1—C8—H8B | 109.9 |
O6—Zn1—O1 | 103.73 (18) | C9—C8—H8B | 109.9 |
O2—Zn1—O1 | 77.77 (16) | H8A—C8—H8B | 108.3 |
O6—Zn1—N1 | 111.0 (2) | O4—C15—C14 | 125.9 (6) |
O2—Zn1—N1 | 147.0 (2) | O4—C15—C16 | 112.4 (5) |
O1—Zn1—N1 | 89.38 (18) | C14—C15—C16 | 121.7 (6) |
O6—Zn1—N2 | 112.73 (19) | O2—C16—C11 | 125.9 (5) |
O2—Zn1—N2 | 89.48 (19) | O2—C16—C15 | 115.8 (5) |
O1—Zn1—N2 | 143.1 (2) | C11—C16—C15 | 118.2 (5) |
N1—Zn1—N2 | 82.8 (2) | N2—C10—C11 | 125.9 (5) |
C7—N1—C8 | 121.9 (5) | N2—C10—H10 | 117.1 |
C7—N1—Zn1 | 129.6 (4) | C11—C10—H10 | 117.1 |
C8—N1—Zn1 | 107.8 (4) | C12—C11—C16 | 119.1 (6) |
N3—O12—Eu1 | 94.6 (4) | C12—C11—C10 | 118.2 (6) |
C1—O1—Zn1 | 127.4 (3) | C16—C11—C10 | 122.5 (6) |
C1—O1—Eu1 | 131.8 (3) | N2—C9—C8 | 110.4 (5) |
Zn1—O1—Eu1 | 100.89 (16) | N2—C9—H9A | 109.6 |
C2—O3—C18 | 116.3 (5) | C8—C9—H9A | 109.6 |
C2—O3—Eu1 | 117.2 (3) | N2—C9—H9B | 109.6 |
C18—O3—Eu1 | 126.5 (4) | C8—C9—H9B | 109.6 |
N4—O9—Eu1 | 94.8 (3) | H9A—C9—H9B | 108.1 |
N4—O8—Eu1 | 95.7 (4) | O4—C17—H17A | 109.5 |
O10—N4—O8 | 124.6 (6) | O4—C17—H17B | 109.5 |
O10—N4—O9 | 120.1 (6) | H17A—C17—H17B | 109.5 |
O8—N4—O9 | 115.3 (5) | O4—C17—H17C | 109.5 |
O1—C1—C2 | 115.6 (5) | H17A—C17—H17C | 109.5 |
O1—C1—C6 | 124.8 (5) | H17B—C17—H17C | 109.5 |
C2—C1—C6 | 119.5 (6) | C15—C14—C13 | 117.6 (6) |
C5—C4—C3 | 122.5 (7) | C15—C14—H14 | 121.2 |
C5—C4—H4 | 118.8 | C13—C14—H14 | 121.2 |
C3—C4—H4 | 118.8 | C13—C12—C11 | 121.3 (6) |
O3—C2—C1 | 113.1 (5) | C13—C12—H12 | 119.3 |
O3—C2—C3 | 124.6 (6) | C11—C12—H12 | 119.3 |
C1—C2—C3 | 122.3 (6) | C12—C13—C14 | 122.0 (7) |
O13—N3—O11 | 121.4 (6) | C12—C13—H13 | 119.0 |
O13—N3—O12 | 123.2 (7) | C14—C13—H13 | 119.0 |
O11—N3—O12 | 115.4 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
C12—H12···O11i | 0.93 | 2.49 | 3.406 (8) | 169 |
C8—H8A···O13ii | 0.97 | 2.50 | 3.442 (9) | 163 |
Symmetry codes: (i) x+1/2, −y+1/2, z−1/2; (ii) −x+1, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | [EuZn(C18H18N2O4)(NO3)3] |
Mr | 729.70 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 10.6576 (13), 16.460 (2), 14.8760 (18) |
β (°) | 99.253 (2) |
V (Å3) | 2575.7 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.42 |
Crystal size (mm) | 0.22 × 0.21 × 0.13 |
Data collection | |
Diffractometer | Bruker APEXII area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2004) |
Tmin, Tmax | 0.520, 0.665 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 19080, 6166, 4469 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.666 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.137, 1.00 |
No. of reflections | 6166 |
No. of parameters | 346 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.01, −1.34 |
Computer programs: APEX2 (Bruker, 2004), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), APEX2 and publCIF (Westrip, 2007).
Eu1—O1 | 2.234 (4) | Eu1—O11 | 2.368 (4) |
Eu1—O2 | 2.239 (4) | Eu1—O12 | 2.400 (5) |
Eu1—O3 | 2.584 (4) | Zn1—O1 | 2.027 (4) |
Eu1—O4 | 2.587 (4) | Zn1—O2 | 2.005 (4) |
Eu1—O5 | 2.252 (5) | Zn1—O6 | 1.971 (4) |
Eu1—O8 | 2.432 (4) | Zn1—N1 | 2.032 (5) |
Eu1—O9 | 2.405 (4) | Zn1—N2 | 2.048 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
C12—H12···O11i | 0.93 | 2.49 | 3.406 (8) | 169.2 |
C8—H8A···O13ii | 0.97 | 2.50 | 3.442 (9) | 162.7 |
Symmetry codes: (i) x+1/2, −y+1/2, z−1/2; (ii) −x+1, −y, −z. |
Acknowledgements
We gratefully acknowledge financial support from the Department of Education, JiangXi Province (No. 2007317) and the Natural Science Foundation of JiangXi Province (No. 0620029).
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 potential applications of trivalent lanthanide complexes as contrast agent for magnetic resonance imaging and stains for fluorescence imaging have prompted considerable interest in the preparation, magnetic and optical properties of 3 d-4f hetorometallic dinuclear complexes (Baggio et al., 2000; Caravan et al., 1999; Edder et al., 2000; Knoer et al., 2005). As part of our investigations into the structure and applications of 3 d-4f hetorometallic Schiff base complexes(Sui et al. 2006; Sui et al. 2007), we report here the synthesis and X-ray crystal structure analysis of the title complex, (I), a new ZnII—EuIII complex with salen-type Schiff base N,N'-bis(3-methoxysalicylidene) ethylenediamine(H2L).
Complex (I) crystallizes in the space group P21/n, with zinc and europium triply bridged by two phenolate O atoms provided by the Schiff base ligand and one nitrate ion. The inner salen-type cavity is occupied by zinc(II), while europium(III) is present in the open and larger portion of the dinucleating compartmental Schiff base ligand.
The EuIII center has a nonacoordination environment of O atoms, involving the phenolate O atoms, two methoxy O atoms, two O atoms from two nitrate ions and one from the bridging nitrate ion. The four kinds of Eu—O bond distances are significantly different, the longest being the Eu—O(methoxy) separations and the shortest being the Eu—O(phenolate) and Eu—O5(bridging nitrate).
The ZnII is in a square-pyramidal geometry and is five-coordinated by two imine N atoms, two phenolate O atoms and one of the bridging nitrate O atoms. The Zn atom is 0.6073 (3)Å above the mean N2O2 plane with an average deviation from the plane of 0.0353 (4) Å, which construct the bottom of square-pyramid. The Zn—O6 (bridging nitrate) separation is 1.971 (4)Å and the angles of this Zn—O vector with the Zn—N or Zn—O bonds lie between 101.7 (5)° and 112.7 (6)°, which suggesting that the ZnII is in a slightly distorted square-pyramidal conformation.
Adjacent molecules are held together by weak interactions (C8—H8A···O13i = 3.442 (9) and C12—H12···O11ii = 3.406 (8); symmetry codes: (i) 1 - x, -y, -z; (ii) 1/2 + x, 1/2 - y, -1/2 + z). These link the molecules into a two-dimensional double-layer structure (Fig 2).