metal-organic compounds
Triaquabis{μ-N-[N-(4-methoxy-2-oxidobenzylidene)glycyl]glycinato(3−)}cadmium(II)dicopper(II) dihydrate
aCollege of Chemistry and Chemical Engineering, Yangzhou Universitry, Yangzhou 225002, People's Republic of China
*Correspondence e-mail: liuwl@yzu.edu.cn
In the title compound, [CdCu2(C12H11N2O5)2(H2O)3]·2H2O, the CuII atoms are in a square plane of N2O2 atoms contributed by the tetradentate Schiff base trianion. The CuII atoms are coordinated by one phenolate O atom, one imine N atom, one amido N atom and one carboxylate O atom. The CdII atom is connected via the carboxylate groups, forming a heterotrinuclear CuII–CdII–CuII system. The CdII atom is seven-coordinate in a pentagonal-bipyramidal geometry with four O atoms from two carboxylate groups and three aqua ligands. The heterotrinuclear molecules are linked to the uncoordinated water molecules by O—H⋯O hydrogen bonds into a three-dimensional framework.
Related literature
For the magnetic properties of heteronuclear Schiff-base complexes, see: Liu et al. (2004); Zou et al. (2003); Wu et al. (2007); Costes et al. (2006). For their optical properties; see: Akine et al. (2008). For the synthesis, see: Miyasaka et al. (1996).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2002); cell SAINT-Plus (Bruker, 2003); data reduction: SAINT-Plus; 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, 2006); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536809039440/ng2653sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809039440/ng2653Isup2.hkl
Glycylglycine (5 mmol), 4-methoxy-salicylaldehyde (5 mmol) and LiOH (10 mmol) were dissolved in MeOH/H2O (30 ml, v:v = 1:1) and refluxed for 30 min. Then Cu(ClO4)2.6H2O (5 mmol) was added to the solution and the resulting solution was adjusted to 9–11 by 5 mol/L NaOH solution. After stirring at room temperature for 1 h, CdCl2.2.5H2O (2.5 mmol) was added. A violet precipitate was obtained immediately. After stirring for another 30 min and then filtrated, the precipitate was recrystallized from water. The violet crystals suitable for X-ray diffraction were obtained after one week. (yield 45% based on Cu(ClO4)2.6H2O).
The water H atoms in (I) were located in a difference Fourier map with a distance restraint of O—H = 0.85 Å and Uiso(H) =1.5Ueq(O). All other H atoms were positioned geometrically and constrained as riding atoms, with C—H distances of 0.93–0.97 Å and Uiso(H) set to 1.2 or 1.5Ueq(C) of the parent atom.
In recent years, the design and synthesis of Schiff base heteronuclear complexes that provide catalyst, biological activity, optical, magnetic materials (Wu et al., 2007; Costes et al., 2006; Liu et al., 2004; Zou et al., 2003; Akine et al., 2008) caused an increasing interest in coordination chemistry. One of the best strategies to design heterometallic species is the 'complex as ligand' approach (Miyasaka et al., 1996). In this article, we present the synthesis and structure of the title heterotrinuclear Schiff base complex derived from 4-methoxy-salicylaldehyde and glycylglycine.
The complex (I) is a asymmetric trinuclear [(CuL)2Cd(H2O)3] unit with the the L3- bound to CuII and CdII atoms and crystallizes in the triclinic 1 (Fig. 1). Two [CuL]- groups are connected by CdII cation in cis form to constitute a trinuclear CuII–CdII–CuII unit with Cu···Cu distances of 7.541 Å. [CuL]- anions have approximately square-planar structures. The Schiff base ligand L3- acts as a triple negatively charged quadridentate ONNO chelate and coordinated to the CuII atom via one phenolic oxygen, one imino nitrogen atom, one deprotonated amide nitrogen atom and one carboxylato oxygen atom. The Cu—O and Cu—N bond distances are in the range of 1.882 (2)–1.985 (2) Å and 1.889 (3)–1.923 (3) Å, respectively. The phenyl ring [C(1)—C(6)] / [C(13)—C(18)] and the chelate ring [O(1), C(1), C(6), C(7), N(1), Cu(1)] / [O(6), C(13), C(18), C(19), N(3), Cu(2)] make a small dihedral angle of 7.5 (2) ° / 8.9 (2) °, suggesting a large π-electron delocalization. The chelate rings [O(1), C(1), C(6), C(7), N(1), Cu(1)] and [O(6), C(13), C(18), C(19), N(3), Cu(2)] in the trinuclear moiety is almost parallel, with a small dihedral angle of 3.1 (2)°. The CdII atom is in a distorted pentagonal bipyramid environment, ligated by four carboxylato oxygen atoms (O(3), O(4), O(8), O(9)) arising from two [CuL]- units and three aqua ligands (O(11), O(12), O(13)). The seven Cd—O bonds in the structure are in the range of 2.258 (3) - 2.545 (3) Å. In the the hydrogen bonds (Table 1), O(11)–O(14), O(7)–O(11) and O(7)–O(14) formed a hexagon ring (Fig. 2(a)). The hexagon rings are further connected by CdII ions and hydrogen bonds composing two-dimensional framework in ac-plane. The two-dimensional frameworks are further connected via the intermolecular hydrogen bonds O(12)–O(2), O(12)–O(15) and O(15)–O(9) to constitute a three-dimensional network (Fig. 2(b)).
PFor the magnetic properties of heteronuclear Schiff-base complexes, see: Liu et al. (2004); Zou et al. (2003); Wu et al. (2007); Costes et al. (2006). For their optical properties; see: Akine et al.(2008). For the synthesis, see: Miyasaka et al. (1996).
Data collection: SMART (Burker, 2002); cell
SAINT-Plus (Bruker, 2003); data reduction: SAINT-Plus (Bruker, 2003); 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, 2006); software used to prepare material for publication: SHELXTL (Sheldrick 2008).Fig. 1. The molecular structure of (I), with atom labels and 50% probability displacement ellipsoids. | |
Fig. 2. (a) A schematic representation of the two-dimensional structure formed via hydrogen bonds, viewed from the ac-plane, showing the hydrogen bond hexagon rings. (b) A packing diagram for (I), viewed down the b-axis, showing a three-dimensional framework connected by O—H···O hydrogen bonds (dashed lines). |
[CdCu2(C12H11N2O5)2(H2O)3]·2H2O | Z = 2 |
Mr = 856.02 | F(000) = 860 |
Triclinic, P1 | Dx = 1.888 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.813 (2) Å | Cell parameters from 6310 reflections |
b = 12.547 (3) Å | θ = 2.4–27.8° |
c = 12.598 (3) Å | µ = 2.18 mm−1 |
α = 94.175 (4)° | T = 296 K |
β = 103.168 (3)° | Block, violet |
γ = 90.148 (4)° | 0.30 × 0.25 × 0.22 mm |
V = 1506.0 (6) Å3 |
Bruker SMART APEX CCD diffractometer | 5169 independent reflections |
Radiation source: fine-focus sealed tube | 4763 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.072 |
φ and ω scans | θmax = 25.0°, θmin = 2.1° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | h = −11→11 |
Tmin = 0.529, Tmax = 0.619 | k = −11→14 |
7383 measured reflections | l = −14→12 |
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)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.110 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0755P)2 + 0.7984P] where P = (Fo2 + 2Fc2)/3 |
5169 reflections | (Δ/σ)max = 0.001 |
417 parameters | Δρmax = 1.00 e Å−3 |
0 restraints | Δρmin = −1.13 e Å−3 |
[CdCu2(C12H11N2O5)2(H2O)3]·2H2O | γ = 90.148 (4)° |
Mr = 856.02 | V = 1506.0 (6) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.813 (2) Å | Mo Kα radiation |
b = 12.547 (3) Å | µ = 2.18 mm−1 |
c = 12.598 (3) Å | T = 296 K |
α = 94.175 (4)° | 0.30 × 0.25 × 0.22 mm |
β = 103.168 (3)° |
Bruker SMART APEX CCD diffractometer | 5169 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | 4763 reflections with I > 2σ(I) |
Tmin = 0.529, Tmax = 0.619 | Rint = 0.072 |
7383 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 0 restraints |
wR(F2) = 0.110 | H-atom parameters constrained |
S = 1.05 | Δρmax = 1.00 e Å−3 |
5169 reflections | Δρmin = −1.13 e Å−3 |
417 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 | ||
Cu1 | 0.54611 (4) | 0.14993 (3) | 0.11223 (4) | 0.03071 (14) | |
Cu2 | −0.10904 (4) | 0.15156 (3) | 0.32980 (3) | 0.02996 (14) | |
Cd1 | 0.20503 (2) | 0.285718 (19) | 0.19598 (2) | 0.03119 (12) | |
C1 | 0.5331 (4) | −0.0578 (3) | 0.1873 (3) | 0.0314 (7) | |
C2 | 0.4838 (4) | −0.1279 (3) | 0.2518 (3) | 0.0352 (8) | |
H2 | 0.4140 | −0.1058 | 0.2870 | 0.042* | |
C3 | 0.5367 (4) | −0.2297 (3) | 0.2644 (3) | 0.0368 (8) | |
C4 | 0.6384 (4) | −0.2668 (3) | 0.2106 (3) | 0.0399 (9) | |
H4 | 0.6698 | −0.3365 | 0.2156 | 0.048* | |
C5 | 0.6902 (4) | −0.1979 (3) | 0.1506 (3) | 0.0379 (8) | |
H5 | 0.7602 | −0.2216 | 0.1162 | 0.046* | |
C6 | 0.6440 (4) | −0.0933 (3) | 0.1375 (3) | 0.0318 (7) | |
C12 | 0.5260 (5) | −0.3950 (3) | 0.3460 (4) | 0.0538 (11) | |
H12A | 0.5008 | −0.4342 | 0.2758 | 0.081* | |
H12B | 0.4796 | −0.4266 | 0.3957 | 0.081* | |
H12C | 0.6255 | −0.3972 | 0.3736 | 0.081* | |
C7 | 0.7203 (4) | −0.0258 (3) | 0.0834 (3) | 0.0340 (8) | |
H7 | 0.7910 | −0.0567 | 0.0540 | 0.041* | |
C8 | 0.7864 (4) | 0.1400 (3) | 0.0230 (3) | 0.0363 (8) | |
H8A | 0.7799 | 0.1131 | −0.0522 | 0.044* | |
H8B | 0.8833 | 0.1364 | 0.0624 | 0.044* | |
C9 | 0.7392 (4) | 0.2552 (3) | 0.0264 (3) | 0.0309 (7) | |
C10 | 0.5513 (4) | 0.3681 (3) | 0.0622 (3) | 0.0351 (8) | |
H10A | 0.5175 | 0.3910 | −0.0109 | 0.042* | |
H10B | 0.6151 | 0.4227 | 0.1048 | 0.042* | |
C11 | 0.4297 (4) | 0.3510 (3) | 0.1151 (3) | 0.0319 (8) | |
C13 | −0.0359 (4) | −0.0660 (3) | 0.3442 (3) | 0.0305 (7) | |
C18 | −0.1321 (4) | −0.0824 (3) | 0.4113 (3) | 0.0335 (8) | |
C17 | −0.1393 (4) | −0.1828 (3) | 0.4521 (3) | 0.0386 (8) | |
H17 | −0.1992 | −0.1922 | 0.4984 | 0.046* | |
C16 | −0.0620 (4) | −0.2677 (3) | 0.4267 (3) | 0.0410 (9) | |
H16 | −0.0676 | −0.3332 | 0.4559 | 0.049* | |
C15 | 0.0253 (4) | −0.2527 (3) | 0.3556 (3) | 0.0371 (8) | |
C14 | 0.0404 (4) | −0.1550 (3) | 0.3168 (3) | 0.0344 (8) | |
H18 | 0.1021 | −0.1472 | 0.2717 | 0.041* | |
C24 | 0.1580 (5) | −0.3390 (3) | 0.2383 (4) | 0.0483 (10) | |
H24A | 0.0958 | −0.3078 | 0.1789 | 0.072* | |
H24B | 0.1793 | −0.4104 | 0.2152 | 0.072* | |
H24C | 0.2429 | −0.2968 | 0.2601 | 0.072* | |
C19 | −0.2290 (4) | −0.0041 (3) | 0.4348 (3) | 0.0347 (8) | |
H19 | −0.2887 | −0.0233 | 0.4782 | 0.042* | |
C20 | −0.3461 (4) | 0.1646 (3) | 0.4241 (3) | 0.0378 (8) | |
H20A | −0.3450 | 0.1684 | 0.5015 | 0.045* | |
H20B | −0.4383 | 0.1395 | 0.3838 | 0.045* | |
C21 | −0.3162 (4) | 0.2750 (3) | 0.3911 (3) | 0.0321 (7) | |
C22 | −0.1562 (4) | 0.3748 (3) | 0.3139 (3) | 0.0363 (8) | |
H22A | −0.1300 | 0.4271 | 0.3759 | 0.044* | |
H22B | −0.2278 | 0.4051 | 0.2586 | 0.044* | |
C23 | −0.0309 (4) | 0.3470 (3) | 0.2686 (3) | 0.0281 (7) | |
N1 | 0.6983 (3) | 0.0738 (2) | 0.0726 (2) | 0.0318 (6) | |
N2 | 0.6222 (3) | 0.2672 (2) | 0.0577 (3) | 0.0342 (7) | |
N3 | −0.2407 (3) | 0.0901 (2) | 0.4011 (2) | 0.0339 (7) | |
N4 | −0.2090 (3) | 0.2785 (2) | 0.3474 (3) | 0.0342 (7) | |
O1 | 0.4761 (3) | 0.03723 (19) | 0.1772 (2) | 0.0352 (6) | |
O2 | 0.8121 (3) | 0.3263 (2) | 0.0003 (2) | 0.0445 (7) | |
O3 | 0.4089 (3) | 0.2550 (2) | 0.1407 (2) | 0.0348 (6) | |
O4 | 0.3531 (3) | 0.4239 (2) | 0.1324 (2) | 0.0419 (6) | |
O5 | 0.4843 (3) | −0.2862 (2) | 0.3354 (2) | 0.0467 (7) | |
O6 | −0.0138 (3) | 0.02539 (18) | 0.3055 (2) | 0.0348 (6) | |
O7 | −0.3929 (3) | 0.3516 (2) | 0.4086 (2) | 0.0435 (7) | |
O8 | 0.0039 (3) | 0.24752 (19) | 0.2634 (2) | 0.0327 (5) | |
O9 | 0.0383 (3) | 0.41583 (19) | 0.2384 (2) | 0.0352 (6) | |
O10 | 0.0928 (3) | −0.3418 (2) | 0.3282 (2) | 0.0483 (7) | |
O11 | 0.3254 (3) | 0.3184 (2) | 0.3709 (2) | 0.0412 (6) | |
H11C | 0.4125 | 0.3135 | 0.3739 | 0.062* | |
H11D | 0.3080 | 0.3810 | 0.3942 | 0.062* | |
O12 | 0.0844 (3) | 0.2909 (2) | 0.0208 (2) | 0.0377 (6) | |
H12D | 0.0086 | 0.2548 | 0.0113 | 0.057* | |
H12E | 0.0657 | 0.3553 | 0.0074 | 0.057* | |
O13 | 0.2045 (3) | 0.0988 (2) | 0.1947 (3) | 0.0557 (8) | |
H13A | 0.1389 | 0.0784 | 0.2229 | 0.084* | |
H13C | 0.2825 | 0.0788 | 0.2318 | 0.084* | |
O14 | 0.2161 (3) | 0.4906 (2) | 0.4629 (2) | 0.0426 (6) | |
H14A | 0.2556 | 0.5506 | 0.4612 | 0.064* | |
H14B | 0.1309 | 0.4922 | 0.4286 | 0.064* | |
O15 | 0.1553 (3) | 0.4549 (2) | 0.9108 (3) | 0.0534 (8) | |
H15B | 0.2321 | 0.4841 | 0.9461 | 0.080* | |
H15C | 0.0889 | 0.4979 | 0.9122 | 0.080* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.0256 (2) | 0.0291 (2) | 0.0397 (3) | 0.00437 (17) | 0.01238 (18) | 0.00152 (17) |
Cu2 | 0.0280 (2) | 0.0263 (2) | 0.0380 (3) | 0.00544 (17) | 0.01270 (18) | 0.00209 (17) |
Cd1 | 0.02616 (17) | 0.03008 (17) | 0.03877 (18) | 0.00474 (11) | 0.01123 (11) | −0.00016 (11) |
C1 | 0.0277 (17) | 0.0302 (17) | 0.0338 (18) | 0.0049 (14) | 0.0037 (14) | −0.0031 (14) |
C2 | 0.0284 (18) | 0.0325 (18) | 0.044 (2) | 0.0067 (14) | 0.0072 (15) | 0.0018 (15) |
C3 | 0.0324 (19) | 0.0315 (18) | 0.042 (2) | 0.0008 (15) | −0.0007 (16) | 0.0022 (15) |
C4 | 0.043 (2) | 0.0287 (18) | 0.041 (2) | 0.0074 (16) | −0.0050 (17) | −0.0007 (15) |
C5 | 0.0335 (19) | 0.0363 (19) | 0.040 (2) | 0.0089 (15) | 0.0029 (16) | −0.0068 (15) |
C6 | 0.0276 (17) | 0.0320 (18) | 0.0331 (18) | 0.0035 (14) | 0.0032 (14) | −0.0040 (14) |
C12 | 0.064 (3) | 0.036 (2) | 0.059 (3) | 0.004 (2) | 0.006 (2) | 0.0156 (19) |
C7 | 0.0263 (17) | 0.039 (2) | 0.0357 (19) | 0.0067 (14) | 0.0072 (14) | −0.0068 (15) |
C8 | 0.0267 (18) | 0.044 (2) | 0.041 (2) | 0.0026 (15) | 0.0142 (15) | −0.0037 (16) |
C9 | 0.0232 (17) | 0.041 (2) | 0.0287 (17) | 0.0014 (14) | 0.0068 (13) | 0.0010 (14) |
C10 | 0.0295 (18) | 0.0327 (18) | 0.044 (2) | 0.0005 (15) | 0.0091 (15) | 0.0044 (15) |
C11 | 0.0260 (18) | 0.0343 (19) | 0.0328 (18) | −0.0010 (15) | 0.0021 (14) | −0.0006 (14) |
C13 | 0.0312 (18) | 0.0292 (17) | 0.0288 (17) | 0.0023 (14) | 0.0021 (14) | 0.0033 (13) |
C18 | 0.0325 (19) | 0.0351 (19) | 0.0301 (18) | −0.0005 (15) | 0.0020 (14) | 0.0003 (14) |
C17 | 0.042 (2) | 0.036 (2) | 0.0361 (19) | −0.0030 (16) | 0.0065 (16) | 0.0047 (15) |
C16 | 0.047 (2) | 0.0324 (19) | 0.040 (2) | −0.0014 (16) | −0.0001 (17) | 0.0103 (15) |
C15 | 0.041 (2) | 0.0307 (18) | 0.0338 (19) | 0.0055 (15) | −0.0017 (16) | −0.0005 (14) |
C14 | 0.0355 (19) | 0.0317 (18) | 0.0347 (18) | 0.0034 (15) | 0.0049 (15) | 0.0027 (14) |
C24 | 0.047 (2) | 0.034 (2) | 0.065 (3) | 0.0058 (17) | 0.017 (2) | −0.0012 (18) |
C19 | 0.0321 (19) | 0.038 (2) | 0.0352 (19) | −0.0047 (15) | 0.0110 (15) | 0.0008 (15) |
C20 | 0.0291 (19) | 0.040 (2) | 0.046 (2) | 0.0027 (15) | 0.0148 (16) | 0.0004 (16) |
C21 | 0.0223 (17) | 0.0376 (19) | 0.0341 (18) | 0.0021 (14) | 0.0051 (14) | −0.0071 (14) |
C22 | 0.0350 (19) | 0.0316 (18) | 0.043 (2) | 0.0064 (15) | 0.0115 (16) | 0.0000 (15) |
C23 | 0.0285 (17) | 0.0270 (17) | 0.0263 (16) | 0.0073 (14) | 0.0022 (13) | −0.0016 (13) |
N1 | 0.0251 (15) | 0.0350 (16) | 0.0362 (16) | 0.0046 (12) | 0.0101 (12) | −0.0006 (12) |
N2 | 0.0273 (15) | 0.0343 (16) | 0.0435 (17) | 0.0026 (12) | 0.0125 (13) | 0.0047 (13) |
N3 | 0.0316 (16) | 0.0325 (16) | 0.0398 (16) | 0.0005 (12) | 0.0136 (13) | −0.0008 (12) |
N4 | 0.0304 (16) | 0.0314 (15) | 0.0434 (17) | 0.0078 (12) | 0.0140 (13) | 0.0022 (12) |
O1 | 0.0319 (13) | 0.0284 (13) | 0.0490 (15) | 0.0075 (10) | 0.0160 (11) | 0.0050 (11) |
O2 | 0.0309 (14) | 0.0480 (16) | 0.0585 (17) | −0.0004 (12) | 0.0160 (13) | 0.0110 (13) |
O3 | 0.0306 (13) | 0.0312 (13) | 0.0480 (15) | 0.0059 (10) | 0.0198 (11) | 0.0047 (11) |
O4 | 0.0326 (14) | 0.0335 (14) | 0.0608 (18) | 0.0093 (11) | 0.0144 (12) | 0.0000 (12) |
O5 | 0.0508 (17) | 0.0351 (14) | 0.0559 (17) | 0.0065 (12) | 0.0130 (14) | 0.0120 (12) |
O6 | 0.0366 (14) | 0.0241 (12) | 0.0479 (15) | 0.0053 (10) | 0.0172 (11) | 0.0054 (10) |
O7 | 0.0290 (14) | 0.0411 (15) | 0.0608 (17) | 0.0061 (11) | 0.0156 (12) | −0.0093 (13) |
O8 | 0.0304 (13) | 0.0287 (12) | 0.0420 (14) | 0.0065 (10) | 0.0141 (11) | 0.0045 (10) |
O9 | 0.0332 (14) | 0.0265 (12) | 0.0469 (15) | 0.0008 (10) | 0.0112 (11) | 0.0030 (10) |
O10 | 0.0637 (19) | 0.0301 (14) | 0.0515 (17) | 0.0137 (13) | 0.0121 (14) | 0.0079 (12) |
O11 | 0.0296 (13) | 0.0465 (15) | 0.0452 (15) | 0.0062 (11) | 0.0071 (11) | −0.0082 (12) |
O12 | 0.0313 (13) | 0.0406 (14) | 0.0419 (14) | 0.0023 (11) | 0.0088 (11) | 0.0053 (11) |
O13 | 0.0466 (17) | 0.0364 (15) | 0.093 (2) | 0.0109 (13) | 0.0331 (17) | 0.0098 (15) |
O14 | 0.0462 (16) | 0.0375 (14) | 0.0413 (15) | 0.0083 (12) | 0.0054 (12) | −0.0002 (11) |
O15 | 0.0424 (17) | 0.0470 (17) | 0.070 (2) | 0.0006 (13) | 0.0068 (15) | 0.0164 (15) |
Cu1—O1 | 1.887 (3) | C11—O4 | 1.224 (5) |
Cu1—N2 | 1.889 (3) | C11—O3 | 1.296 (4) |
Cu1—N1 | 1.916 (3) | C13—O6 | 1.315 (4) |
Cu1—O3 | 1.960 (2) | C13—C14 | 1.411 (5) |
Cu2—O6 | 1.882 (2) | C13—C18 | 1.427 (5) |
Cu2—N4 | 1.898 (3) | C18—C17 | 1.402 (5) |
Cu2—N3 | 1.922 (3) | C18—C19 | 1.431 (5) |
Cu2—O8 | 1.985 (2) | C17—C16 | 1.370 (6) |
Cd1—O11 | 2.258 (3) | C17—H17 | 0.9300 |
Cd1—O12 | 2.260 (3) | C16—C15 | 1.395 (6) |
Cd1—O3 | 2.288 (2) | C16—H16 | 0.9300 |
Cd1—O13 | 2.345 (3) | C15—O10 | 1.364 (5) |
Cd1—O8 | 2.380 (2) | C15—C14 | 1.372 (5) |
Cd1—O9 | 2.432 (3) | C14—H18 | 0.9300 |
Cd1—O4 | 2.545 (3) | C24—O10 | 1.425 (5) |
C1—O1 | 1.320 (4) | C24—H24A | 0.9600 |
C1—C2 | 1.396 (5) | C24—H24B | 0.9600 |
C1—C6 | 1.431 (5) | C24—H24C | 0.9600 |
C2—C3 | 1.387 (5) | C19—N3 | 1.282 (5) |
C2—H2 | 0.9300 | C19—H19 | 0.9300 |
C3—O5 | 1.366 (5) | C20—N3 | 1.459 (5) |
C3—C4 | 1.391 (6) | C20—C21 | 1.522 (5) |
C4—C5 | 1.359 (6) | C20—H20A | 0.9700 |
C4—H4 | 0.9300 | C20—H20B | 0.9700 |
C5—C6 | 1.399 (5) | C21—O7 | 1.260 (4) |
C5—H5 | 0.9300 | C21—N4 | 1.296 (5) |
C6—C7 | 1.434 (5) | C22—N4 | 1.440 (5) |
C12—O5 | 1.433 (5) | C22—C23 | 1.501 (5) |
C12—H12A | 0.9600 | C22—H22A | 0.9700 |
C12—H12B | 0.9600 | C22—H22B | 0.9700 |
C12—H12C | 0.9600 | C23—O9 | 1.230 (4) |
C7—N1 | 1.281 (5) | C23—O8 | 1.296 (4) |
C7—H7 | 0.9300 | O11—H11C | 0.8502 |
C8—N1 | 1.464 (5) | O11—H11D | 0.8500 |
C8—C9 | 1.520 (5) | O12—H12D | 0.8499 |
C8—H8A | 0.9700 | O12—H12E | 0.8500 |
C8—H8B | 0.9700 | O13—H13A | 0.8499 |
C9—O2 | 1.249 (5) | O13—H13C | 0.8500 |
C9—N2 | 1.302 (5) | O14—H14A | 0.8500 |
C10—N2 | 1.450 (5) | O14—H14B | 0.8500 |
C10—C11 | 1.515 (5) | O15—H15B | 0.8500 |
C10—H10A | 0.9700 | O15—H15C | 0.8499 |
C10—H10B | 0.9700 | ||
O1—Cu1—N2 | 175.76 (13) | O6—C13—C18 | 125.0 (3) |
O1—Cu1—N1 | 96.85 (12) | C14—C13—C18 | 117.3 (3) |
N2—Cu1—N1 | 84.08 (13) | C17—C18—C13 | 118.9 (3) |
O1—Cu1—O3 | 95.95 (11) | C17—C18—C19 | 117.1 (3) |
N2—Cu1—O3 | 83.07 (12) | C13—C18—C19 | 123.9 (3) |
N1—Cu1—O3 | 167.14 (12) | C16—C17—C18 | 122.9 (4) |
O6—Cu2—N4 | 177.36 (13) | C16—C17—H17 | 118.6 |
O6—Cu2—N3 | 97.34 (12) | C18—C17—H17 | 118.6 |
N4—Cu2—N3 | 83.47 (13) | C17—C16—C15 | 117.7 (3) |
O6—Cu2—O8 | 96.54 (11) | C17—C16—H16 | 121.1 |
N4—Cu2—O8 | 82.68 (12) | C15—C16—H16 | 121.1 |
N3—Cu2—O8 | 166.11 (12) | O10—C15—C14 | 123.4 (4) |
O11—Cd1—O12 | 167.94 (10) | O10—C15—C16 | 114.9 (3) |
O11—Cd1—O3 | 90.74 (10) | C14—C15—C16 | 121.7 (4) |
O12—Cd1—O3 | 91.08 (9) | C15—C14—C13 | 121.3 (4) |
O11—Cd1—O13 | 96.65 (11) | C15—C14—H18 | 119.4 |
O12—Cd1—O13 | 95.42 (11) | C13—C14—H18 | 119.4 |
O3—Cd1—O13 | 81.39 (10) | O10—C24—H24A | 109.5 |
O11—Cd1—O8 | 88.27 (9) | O10—C24—H24B | 109.5 |
O12—Cd1—O8 | 94.42 (9) | H24A—C24—H24B | 109.5 |
O3—Cd1—O8 | 158.18 (9) | O10—C24—H24C | 109.5 |
O13—Cd1—O8 | 77.08 (10) | H24A—C24—H24C | 109.5 |
O11—Cd1—O9 | 86.73 (9) | H24B—C24—H24C | 109.5 |
O12—Cd1—O9 | 85.32 (9) | N3—C19—C18 | 125.7 (3) |
O3—Cd1—O9 | 147.44 (9) | N3—C19—H19 | 117.2 |
O13—Cd1—O9 | 131.15 (10) | C18—C19—H19 | 117.2 |
O8—Cd1—O9 | 54.25 (8) | N3—C20—C21 | 109.8 (3) |
O11—Cd1—O4 | 91.13 (10) | N3—C20—H20A | 109.7 |
O12—Cd1—O4 | 80.39 (9) | C21—C20—H20A | 109.7 |
O3—Cd1—O4 | 53.67 (9) | N3—C20—H20B | 109.7 |
O13—Cd1—O4 | 134.52 (10) | C21—C20—H20B | 109.7 |
O8—Cd1—O4 | 148.13 (8) | H20A—C20—H20B | 108.2 |
O9—Cd1—O4 | 93.90 (8) | O7—C21—N4 | 127.0 (4) |
O1—C1—C2 | 118.2 (3) | O7—C21—C20 | 119.4 (3) |
O1—C1—C6 | 124.2 (3) | N4—C21—C20 | 113.6 (3) |
C2—C1—C6 | 117.6 (3) | N4—C22—C23 | 108.3 (3) |
C3—C2—C1 | 121.4 (4) | N4—C22—H22A | 110.0 |
C3—C2—H2 | 119.3 | C23—C22—H22A | 110.0 |
C1—C2—H2 | 119.3 | N4—C22—H22B | 110.0 |
O5—C3—C2 | 114.5 (4) | C23—C22—H22B | 110.0 |
O5—C3—C4 | 124.5 (3) | H22A—C22—H22B | 108.4 |
C2—C3—C4 | 121.0 (4) | O9—C23—O8 | 120.6 (3) |
C5—C4—C3 | 117.9 (4) | O9—C23—C22 | 121.7 (3) |
C5—C4—H4 | 121.1 | O8—C23—C22 | 117.7 (3) |
C3—C4—H4 | 121.1 | C7—N1—C8 | 122.0 (3) |
C4—C5—C6 | 123.6 (4) | C7—N1—Cu1 | 124.7 (3) |
C4—C5—H5 | 118.2 | C8—N1—Cu1 | 113.2 (2) |
C6—C5—H5 | 118.2 | C9—N2—C10 | 124.0 (3) |
C5—C6—C1 | 118.3 (3) | C9—N2—Cu1 | 118.8 (3) |
C5—C6—C7 | 117.1 (3) | C10—N2—Cu1 | 117.0 (2) |
C1—C6—C7 | 124.3 (3) | C19—N3—C20 | 122.9 (3) |
O5—C12—H12A | 109.5 | C19—N3—Cu2 | 123.0 (3) |
O5—C12—H12B | 109.5 | C20—N3—Cu2 | 113.8 (2) |
H12A—C12—H12B | 109.5 | C21—N4—C22 | 124.0 (3) |
O5—C12—H12C | 109.5 | C21—N4—Cu2 | 119.2 (3) |
H12A—C12—H12C | 109.5 | C22—N4—Cu2 | 116.8 (2) |
H12B—C12—H12C | 109.5 | C1—O1—Cu1 | 124.3 (2) |
N1—C7—C6 | 124.8 (3) | C11—O3—Cu1 | 115.3 (2) |
N1—C7—H7 | 117.6 | C11—O3—Cd1 | 97.6 (2) |
C6—C7—H7 | 117.6 | Cu1—O3—Cd1 | 146.97 (13) |
N1—C8—C9 | 110.0 (3) | C11—O4—Cd1 | 87.5 (2) |
N1—C8—H8A | 109.7 | C3—O5—C12 | 117.5 (3) |
C9—C8—H8A | 109.7 | C13—O6—Cu2 | 123.8 (2) |
N1—C8—H8B | 109.7 | C23—O8—Cu2 | 114.2 (2) |
C9—C8—H8B | 109.7 | C23—O8—Cd1 | 92.9 (2) |
H8A—C8—H8B | 108.2 | Cu2—O8—Cd1 | 151.75 (12) |
O2—C9—N2 | 127.3 (4) | C23—O9—Cd1 | 92.2 (2) |
O2—C9—C8 | 119.4 (3) | C15—O10—C24 | 117.8 (3) |
N2—C9—C8 | 113.2 (3) | Cd1—O11—H11C | 109.4 |
N2—C10—C11 | 107.5 (3) | Cd1—O11—H11D | 109.4 |
N2—C10—H10A | 110.2 | H11C—O11—H11D | 109.5 |
C11—C10—H10A | 110.2 | Cd1—O12—H12D | 109.3 |
N2—C10—H10B | 110.2 | Cd1—O12—H12E | 109.4 |
C11—C10—H10B | 110.2 | H12D—O12—H12E | 109.5 |
H10A—C10—H10B | 108.5 | Cd1—O13—H13A | 109.1 |
O4—C11—O3 | 121.0 (3) | Cd1—O13—H13C | 109.4 |
O4—C11—C10 | 121.9 (3) | H13A—O13—H13C | 109.5 |
O3—C11—C10 | 117.1 (3) | H14A—O14—H14B | 109.5 |
O6—C13—C14 | 117.7 (3) | H15B—O15—H15C | 109.5 |
D—H···A | D—H | H···A | D···A | D—H···A |
O11—H11D···O14 | 0.85 | 1.91 | 2.715 (4) | 158 |
O13—H13A···O6 | 0.85 | 2.14 | 2.987 (4) | 175 |
O13—H13C···O1 | 0.85 | 2.21 | 2.829 (4) | 129 |
O14—H14B···O9 | 0.85 | 2.48 | 3.045 (4) | 125 |
O11—H11C···O7i | 0.85 | 1.91 | 2.722 (4) | 159 |
O12—H12D···O2ii | 0.85 | 2.11 | 2.667 (4) | 123 |
O12—H12E···O15iii | 0.85 | 2.13 | 2.737 (4) | 129 |
O14—H14A···O7iv | 0.85 | 2.17 | 2.791 (4) | 130 |
O15—H15B···O4v | 0.85 | 2.55 | 3.067 (4) | 121 |
O15—H15C···O9iv | 0.85 | 2.36 | 2.934 (4) | 126 |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) x, y, z−1; (iv) −x, −y+1, −z+1; (v) x, y, z+1. |
Experimental details
Crystal data | |
Chemical formula | [CdCu2(C12H11N2O5)2(H2O)3]·2H2O |
Mr | 856.02 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 296 |
a, b, c (Å) | 9.813 (2), 12.547 (3), 12.598 (3) |
α, β, γ (°) | 94.175 (4), 103.168 (3), 90.148 (4) |
V (Å3) | 1506.0 (6) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 2.18 |
Crystal size (mm) | 0.30 × 0.25 × 0.22 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.529, 0.619 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7383, 5169, 4763 |
Rint | 0.072 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.110, 1.05 |
No. of reflections | 5169 |
No. of parameters | 417 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.00, −1.13 |
Computer programs: SMART (Burker, 2002), SAINT-Plus (Bruker, 2003), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick 2008), SHELXTL (Sheldrick 2008) and DIAMOND (Brandenburg, 2006), SHELXTL (Sheldrick 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O11—H11D···O14 | 0.85 | 1.91 | 2.715 (4) | 158.1 |
O13—H13A···O6 | 0.85 | 2.14 | 2.987 (4) | 175.4 |
O13—H13C···O1 | 0.85 | 2.21 | 2.829 (4) | 129.1 |
O14—H14B···O9 | 0.85 | 2.48 | 3.045 (4) | 124.7 |
O11—H11C···O7i | 0.85 | 1.91 | 2.722 (4) | 159.3 |
O12—H12D···O2ii | 0.85 | 2.11 | 2.667 (4) | 122.8 |
O12—H12E···O15iii | 0.85 | 2.13 | 2.737 (4) | 128.5 |
O14—H14A···O7iv | 0.85 | 2.17 | 2.791 (4) | 129.9 |
O15—H15B···O4v | 0.85 | 2.55 | 3.067 (4) | 120.6 |
O15—H15C···O9iv | 0.85 | 2.36 | 2.934 (4) | 125.6 |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) x, y, z−1; (iv) −x, −y+1, −z+1; (v) x, y, z+1. |
Acknowledgements
This work was supported by SRF for ROCS, SEM and Yangzhou University.
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.
In recent years, the design and synthesis of Schiff base heteronuclear complexes that provide catalyst, biological activity, optical, magnetic materials (Wu et al., 2007; Costes et al., 2006; Liu et al., 2004; Zou et al., 2003; Akine et al., 2008) caused an increasing interest in coordination chemistry. One of the best strategies to design heterometallic species is the 'complex as ligand' approach (Miyasaka et al., 1996). In this article, we present the synthesis and structure of the title heterotrinuclear Schiff base complex derived from 4-methoxy-salicylaldehyde and glycylglycine.
The complex (I) is a asymmetric trinuclear [(CuL)2Cd(H2O)3] unit with the the L3- bound to CuII and CdII atoms and crystallizes in the triclinic space group P1 (Fig. 1). Two [CuL]- groups are connected by CdII cation in cis form to constitute a trinuclear CuII–CdII–CuII unit with Cu···Cu distances of 7.541 Å. [CuL]- anions have approximately square-planar structures. The Schiff base ligand L3- acts as a triple negatively charged quadridentate ONNO chelate and coordinated to the CuII atom via one phenolic oxygen, one imino nitrogen atom, one deprotonated amide nitrogen atom and one carboxylato oxygen atom. The Cu—O and Cu—N bond distances are in the range of 1.882 (2)–1.985 (2) Å and 1.889 (3)–1.923 (3) Å, respectively. The phenyl ring [C(1)—C(6)] / [C(13)—C(18)] and the chelate ring [O(1), C(1), C(6), C(7), N(1), Cu(1)] / [O(6), C(13), C(18), C(19), N(3), Cu(2)] make a small dihedral angle of 7.5 (2) ° / 8.9 (2) °, suggesting a large π-electron delocalization. The chelate rings [O(1), C(1), C(6), C(7), N(1), Cu(1)] and [O(6), C(13), C(18), C(19), N(3), Cu(2)] in the trinuclear moiety is almost parallel, with a small dihedral angle of 3.1 (2)°. The CdII atom is in a distorted pentagonal bipyramid environment, ligated by four carboxylato oxygen atoms (O(3), O(4), O(8), O(9)) arising from two [CuL]- units and three aqua ligands (O(11), O(12), O(13)). The seven Cd—O bonds in the structure are in the range of 2.258 (3) - 2.545 (3) Å. In the crystal structure, the hydrogen bonds (Table 1), O(11)–O(14), O(7)–O(11) and O(7)–O(14) formed a hexagon ring (Fig. 2(a)). The hexagon rings are further connected by CdII ions and hydrogen bonds composing two-dimensional framework in ac-plane. The two-dimensional frameworks are further connected via the intermolecular hydrogen bonds O(12)–O(2), O(12)–O(15) and O(15)–O(9) to constitute a three-dimensional network (Fig. 2(b)).