metal-organic compounds
Bis{μ-4-chloro-2-[(2-pyridylethyl)iminomethyl]phenolato}bis[chloridocopper(II)]
aDepartment of Chemistry, Baoji University of Arts and Sciences, Baoji, Shaanxi 721007, People's Republic of China
*Correspondence e-mail: suojn@yahoo.com.cn
The title compound, [Cu2(C14H12ClN2O)2Cl2], is a copper(II) dimer where the metal centres are bridged by O atoms from a 5-chlorosalicylaldehyde group. The coordination geometry of each copper(II) centre is distorted square-pyramidal, with two N atoms from a 2-ethylaminopyridine group and two O atoms from a 5-chlorosalicylaldehyde group occupying the basal positions, and with a Cl atom at the apical position. The dimer is centrosymmetric, with a crystallographic inversion centre midway between the two Cu atoms [Cu⋯Cu = 3.103 (9) Å].
Related literature
For related literature, see: Du et al. (2003); Rojas et al. (2004); Yamada (1999).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Siemens, 1996); cell SAINT (Siemens, 1996); 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); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536808022162/gw2043sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808022162/gw2043Isup2.hkl
5-Chlorosalicylaldehyde (0.1 mmol, 15.7 mg), CuCl2.2H2O (0.1 mmol, 17.05 mg) and 2-ethylaminopyridine(0.1 mmol, 122.2 mg) were dissolved in methanol (10 ml). The mixture was stirred for 30 min at room temperature to give a clear brown solution. After allowing the resulting solution to stand in air for 11 d, brown block-shaped crystals of (I) were formed on slow evaporation of the solvent. The crystals were collected, washed with methanol and dried in a vacuum desiccator using anhydrous CaCl2 (yield 54%). Analysis found: C 46.84°, H 3.35° N 7.80°.calculated for Cu2(C14H12N2OCl2)2Cl2: C 46.86%, H 3.35%, N 7.81°.
All H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms with C—H distances in the range 0.93–0.97 Å and Uiso(H) = 1.2Ueq or 1.5Ueq(C/O)
Data collection: SMART (Siemens, 1996); cell
SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).[Cu2(C14H12ClN2O)2Cl2] | F(000) = 724 |
Mr = 717.39 | Dx = 1.616 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 9.9703 (10) Å | Cell parameters from 3383 reflections |
b = 9.0119 (11) Å | θ = 2.3–28.1° |
c = 16.5018 (16) Å | µ = 1.84 mm−1 |
β = 96.039 (1)° | T = 298 K |
V = 1474.5 (3) Å3 | Block, brown |
Z = 2 | 0.50 × 0.42 × 0.02 mm |
Bruker SMART CCD area-detector diffractometer | 2587 independent reflections |
Radiation source: fine-focus sealed tube | 2101 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.035 |
ϕ and ω scans | θmax = 25.0°, θmin = 2.1° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −11→11 |
Tmin = 0.460, Tmax = 0.957 | k = −10→10 |
7139 measured reflections | l = −14→19 |
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)] = 0.031 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.082 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0359P)2 + 0.6685P] where P = (Fo2 + 2Fc2)/3 |
2587 reflections | (Δ/σ)max = 0.001 |
181 parameters | Δρmax = 0.38 e Å−3 |
0 restraints | Δρmin = −0.32 e Å−3 |
[Cu2(C14H12ClN2O)2Cl2] | V = 1474.5 (3) Å3 |
Mr = 717.39 | Z = 2 |
Monoclinic, P21/c | Mo Kα radiation |
a = 9.9703 (10) Å | µ = 1.84 mm−1 |
b = 9.0119 (11) Å | T = 298 K |
c = 16.5018 (16) Å | 0.50 × 0.42 × 0.02 mm |
β = 96.039 (1)° |
Bruker SMART CCD area-detector diffractometer | 2587 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2101 reflections with I > 2σ(I) |
Tmin = 0.460, Tmax = 0.957 | Rint = 0.035 |
7139 measured reflections |
R[F2 > 2σ(F2)] = 0.031 | 0 restraints |
wR(F2) = 0.082 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.38 e Å−3 |
2587 reflections | Δρmin = −0.32 e Å−3 |
181 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 | 0.40654 (3) | 0.92113 (4) | 0.05596 (2) | 0.03066 (13) | |
Cl1 | 1.06351 (9) | 0.91583 (13) | 0.29917 (6) | 0.0704 (3) | |
Cl2 | 0.29315 (9) | 1.11255 (9) | 0.11335 (5) | 0.0489 (2) | |
N1 | 0.3451 (2) | 0.7177 (2) | 0.01064 (14) | 0.0326 (5) | |
N2 | 0.4538 (2) | 0.8209 (2) | 0.16031 (13) | 0.0328 (5) | |
O1 | 0.60250 (18) | 0.9870 (2) | 0.05178 (11) | 0.0332 (5) | |
C1 | 0.3444 (3) | 0.7399 (4) | 0.19511 (18) | 0.0451 (8) | |
H1A | 0.3116 | 0.7990 | 0.2380 | 0.054* | |
H1B | 0.3796 | 0.6477 | 0.2191 | 0.054* | |
C2 | 0.2278 (3) | 0.7060 (3) | 0.13033 (19) | 0.0431 (8) | |
H2A | 0.1642 | 0.6415 | 0.1538 | 0.052* | |
H2B | 0.1814 | 0.7979 | 0.1147 | 0.052* | |
C3 | 0.2706 (3) | 0.6337 (3) | 0.05563 (18) | 0.0378 (7) | |
C4 | 0.2375 (4) | 0.4895 (4) | 0.0332 (2) | 0.0553 (9) | |
H4 | 0.1859 | 0.4316 | 0.0648 | 0.066* | |
C5 | 0.2823 (5) | 0.4327 (4) | −0.0368 (3) | 0.0684 (12) | |
H5 | 0.2613 | 0.3357 | −0.0526 | 0.082* | |
C6 | 0.3568 (4) | 0.5184 (4) | −0.0824 (2) | 0.0557 (10) | |
H6 | 0.3866 | 0.4812 | −0.1300 | 0.067* | |
C7 | 0.3882 (3) | 0.6617 (3) | −0.05733 (18) | 0.0423 (8) | |
H7 | 0.4401 | 0.7205 | −0.0882 | 0.051* | |
C8 | 0.5714 (3) | 0.8170 (3) | 0.19992 (16) | 0.0346 (7) | |
H8 | 0.5789 | 0.7624 | 0.2480 | 0.042* | |
C9 | 0.6936 (3) | 0.8864 (3) | 0.17933 (16) | 0.0304 (6) | |
C10 | 0.7074 (3) | 0.9662 (3) | 0.10664 (16) | 0.0304 (6) | |
C11 | 0.8341 (3) | 1.0216 (3) | 0.09434 (18) | 0.0392 (7) | |
H11 | 0.8453 | 1.0702 | 0.0458 | 0.047* | |
C12 | 0.9435 (3) | 1.0062 (4) | 0.15249 (19) | 0.0429 (8) | |
H12 | 1.0267 | 1.0463 | 0.1439 | 0.051* | |
C13 | 0.9277 (3) | 0.9303 (3) | 0.22358 (19) | 0.0418 (8) | |
C14 | 0.8076 (3) | 0.8687 (3) | 0.23679 (18) | 0.0387 (7) | |
H14 | 0.8005 | 0.8144 | 0.2841 | 0.046* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.0349 (2) | 0.0311 (2) | 0.02574 (19) | −0.00498 (15) | 0.00216 (14) | 0.00274 (14) |
Cl1 | 0.0410 (5) | 0.1083 (9) | 0.0574 (6) | 0.0051 (5) | −0.0164 (4) | 0.0100 (5) |
Cl2 | 0.0554 (5) | 0.0391 (5) | 0.0541 (5) | 0.0034 (4) | 0.0150 (4) | −0.0099 (4) |
N1 | 0.0365 (14) | 0.0285 (13) | 0.0315 (13) | −0.0010 (11) | −0.0028 (10) | 0.0010 (10) |
N2 | 0.0392 (14) | 0.0313 (13) | 0.0285 (12) | −0.0062 (11) | 0.0061 (10) | 0.0022 (10) |
O1 | 0.0299 (11) | 0.0400 (11) | 0.0286 (10) | −0.0046 (9) | −0.0018 (8) | 0.0094 (9) |
C1 | 0.048 (2) | 0.053 (2) | 0.0358 (17) | −0.0115 (16) | 0.0077 (14) | 0.0078 (15) |
C2 | 0.0405 (18) | 0.0408 (18) | 0.0485 (19) | −0.0105 (15) | 0.0071 (14) | 0.0110 (15) |
C3 | 0.0378 (18) | 0.0288 (16) | 0.0441 (18) | −0.0024 (13) | −0.0078 (14) | 0.0052 (13) |
C4 | 0.067 (2) | 0.0361 (19) | 0.059 (2) | −0.0146 (17) | −0.0094 (18) | 0.0057 (17) |
C5 | 0.090 (3) | 0.032 (2) | 0.077 (3) | −0.001 (2) | −0.022 (2) | −0.0097 (19) |
C6 | 0.073 (3) | 0.042 (2) | 0.050 (2) | 0.0119 (19) | −0.0068 (18) | −0.0130 (17) |
C7 | 0.0445 (19) | 0.0434 (19) | 0.0376 (17) | 0.0064 (15) | −0.0026 (14) | −0.0032 (14) |
C8 | 0.0470 (19) | 0.0328 (16) | 0.0236 (14) | 0.0004 (14) | 0.0017 (12) | 0.0027 (12) |
C9 | 0.0344 (16) | 0.0293 (15) | 0.0270 (15) | −0.0006 (12) | 0.0009 (12) | −0.0026 (11) |
C10 | 0.0345 (16) | 0.0268 (15) | 0.0293 (15) | −0.0010 (12) | 0.0006 (12) | −0.0015 (11) |
C11 | 0.0358 (18) | 0.0423 (18) | 0.0393 (17) | −0.0025 (14) | 0.0028 (13) | 0.0081 (14) |
C12 | 0.0275 (16) | 0.0469 (19) | 0.053 (2) | −0.0012 (14) | −0.0005 (14) | 0.0035 (16) |
C13 | 0.0336 (18) | 0.0494 (19) | 0.0402 (18) | 0.0040 (15) | −0.0070 (13) | −0.0002 (15) |
C14 | 0.0416 (19) | 0.0407 (17) | 0.0321 (16) | 0.0058 (14) | −0.0031 (13) | 0.0030 (13) |
Cu1—O1i | 1.9547 (18) | C4—C5 | 1.381 (5) |
Cu1—N2 | 1.958 (2) | C4—H4 | 0.9300 |
Cu1—N1 | 2.049 (2) | C5—C6 | 1.353 (6) |
Cu1—O1 | 2.0500 (19) | C5—H5 | 0.9300 |
Cu1—Cl2 | 2.3187 (9) | C6—C7 | 1.382 (5) |
Cl1—C13 | 1.747 (3) | C6—H6 | 0.9300 |
N1—C3 | 1.339 (4) | C7—H7 | 0.9300 |
N1—C7 | 1.341 (4) | C8—C9 | 1.441 (4) |
N2—C8 | 1.282 (4) | C8—H8 | 0.9300 |
N2—C1 | 1.478 (4) | C9—C14 | 1.411 (4) |
O1—C10 | 1.323 (3) | C9—C10 | 1.417 (4) |
O1—Cu1i | 1.9547 (18) | C10—C11 | 1.392 (4) |
C1—C2 | 1.525 (4) | C11—C12 | 1.382 (4) |
C1—H1A | 0.9700 | C11—H11 | 0.9300 |
C1—H1B | 0.9700 | C12—C13 | 1.381 (4) |
C2—C3 | 1.495 (4) | C12—H12 | 0.9300 |
C2—H2A | 0.9700 | C13—C14 | 1.358 (4) |
C2—H2B | 0.9700 | C14—H14 | 0.9300 |
C3—C4 | 1.382 (4) | ||
O1i—Cu1—N2 | 168.33 (9) | C5—C4—C3 | 118.9 (4) |
O1i—Cu1—N1 | 93.65 (9) | C5—C4—H4 | 120.5 |
N2—Cu1—N1 | 86.74 (9) | C3—C4—H4 | 120.5 |
O1i—Cu1—O1 | 78.44 (8) | C6—C5—C4 | 119.9 (3) |
N2—Cu1—O1 | 91.22 (8) | C6—C5—H5 | 120.0 |
N1—Cu1—O1 | 119.75 (9) | C4—C5—H5 | 120.0 |
O1i—Cu1—Cl2 | 94.50 (6) | C5—C6—C7 | 119.1 (3) |
N2—Cu1—Cl2 | 93.82 (7) | C5—C6—H6 | 120.4 |
N1—Cu1—Cl2 | 132.43 (7) | C7—C6—H6 | 120.4 |
O1—Cu1—Cl2 | 107.80 (6) | N1—C7—C6 | 121.3 (3) |
C3—N1—C7 | 119.7 (3) | N1—C7—H7 | 119.3 |
C3—N1—Cu1 | 117.75 (19) | C6—C7—H7 | 119.3 |
C7—N1—Cu1 | 122.2 (2) | N2—C8—C9 | 128.2 (3) |
C8—N2—C1 | 117.5 (2) | N2—C8—H8 | 115.9 |
C8—N2—Cu1 | 125.7 (2) | C9—C8—H8 | 115.9 |
C1—N2—Cu1 | 116.79 (18) | C14—C9—C10 | 118.9 (3) |
C10—O1—Cu1i | 129.79 (18) | C14—C9—C8 | 115.7 (3) |
C10—O1—Cu1 | 128.60 (17) | C10—C9—C8 | 125.4 (2) |
Cu1i—O1—Cu1 | 101.56 (8) | O1—C10—C11 | 120.9 (3) |
N2—C1—C2 | 111.4 (2) | O1—C10—C9 | 120.7 (3) |
N2—C1—H1A | 109.3 | C11—C10—C9 | 118.4 (3) |
C2—C1—H1A | 109.3 | C12—C11—C10 | 121.6 (3) |
N2—C1—H1B | 109.3 | C12—C11—H11 | 119.2 |
C2—C1—H1B | 109.3 | C10—C11—H11 | 119.2 |
H1A—C1—H1B | 108.0 | C13—C12—C11 | 119.2 (3) |
C3—C2—C1 | 113.7 (3) | C13—C12—H12 | 120.4 |
C3—C2—H2A | 108.8 | C11—C12—H12 | 120.4 |
C1—C2—H2A | 108.8 | C14—C13—C12 | 121.3 (3) |
C3—C2—H2B | 108.8 | C14—C13—Cl1 | 119.0 (2) |
C1—C2—H2B | 108.8 | C12—C13—Cl1 | 119.6 (3) |
H2A—C2—H2B | 107.7 | C13—C14—C9 | 120.5 (3) |
N1—C3—C4 | 121.0 (3) | C13—C14—H14 | 119.7 |
N1—C3—C2 | 115.7 (3) | C9—C14—H14 | 119.7 |
C4—C3—C2 | 123.3 (3) | ||
O1i—Cu1—N1—C3 | −146.8 (2) | C1—C2—C3—N1 | −66.8 (3) |
N2—Cu1—N1—C3 | 44.9 (2) | C1—C2—C3—C4 | 112.9 (3) |
O1—Cu1—N1—C3 | 134.4 (2) | N1—C3—C4—C5 | −0.2 (5) |
Cl2—Cu1—N1—C3 | −47.3 (2) | C2—C3—C4—C5 | −179.8 (3) |
O1i—Cu1—N1—C7 | 40.0 (2) | C3—C4—C5—C6 | −0.3 (6) |
N2—Cu1—N1—C7 | −128.3 (2) | C4—C5—C6—C7 | 0.7 (6) |
O1—Cu1—N1—C7 | −38.7 (2) | C3—N1—C7—C6 | 0.2 (4) |
Cl2—Cu1—N1—C7 | 139.5 (2) | Cu1—N1—C7—C6 | 173.2 (2) |
O1i—Cu1—N2—C8 | 28.7 (6) | C5—C6—C7—N1 | −0.7 (5) |
N1—Cu1—N2—C8 | 121.0 (2) | C1—N2—C8—C9 | −179.8 (3) |
O1—Cu1—N2—C8 | 1.2 (2) | Cu1—N2—C8—C9 | 1.8 (4) |
Cl2—Cu1—N2—C8 | −106.7 (2) | N2—C8—C9—C14 | 177.1 (3) |
O1i—Cu1—N2—C1 | −149.7 (4) | N2—C8—C9—C10 | −4.4 (5) |
N1—Cu1—N2—C1 | −57.5 (2) | Cu1i—O1—C10—C11 | 4.6 (4) |
O1—Cu1—N2—C1 | −177.2 (2) | Cu1—O1—C10—C11 | −178.7 (2) |
Cl2—Cu1—N2—C1 | 74.8 (2) | Cu1i—O1—C10—C9 | −175.26 (18) |
O1i—Cu1—O1—C10 | −177.4 (3) | Cu1—O1—C10—C9 | 1.4 (4) |
N2—Cu1—O1—C10 | −2.9 (2) | C14—C9—C10—O1 | −179.1 (3) |
N1—Cu1—O1—C10 | −89.8 (2) | C8—C9—C10—O1 | 2.5 (4) |
Cl2—Cu1—O1—C10 | 91.5 (2) | C14—C9—C10—C11 | 1.1 (4) |
O1i—Cu1—O1—Cu1i | 0.0 | C8—C9—C10—C11 | −177.4 (3) |
N2—Cu1—O1—Cu1i | 174.53 (10) | O1—C10—C11—C12 | 177.3 (3) |
N1—Cu1—O1—Cu1i | 87.59 (11) | C9—C10—C11—C12 | −2.9 (4) |
Cl2—Cu1—O1—Cu1i | −91.06 (8) | C10—C11—C12—C13 | 1.8 (5) |
C8—N2—C1—C2 | −159.3 (3) | C11—C12—C13—C14 | 1.1 (5) |
Cu1—N2—C1—C2 | 19.3 (3) | C11—C12—C13—Cl1 | −177.7 (2) |
N2—C1—C2—C3 | 50.8 (4) | C12—C13—C14—C9 | −2.9 (5) |
C7—N1—C3—C4 | 0.2 (4) | Cl1—C13—C14—C9 | 175.9 (2) |
Cu1—N1—C3—C4 | −173.1 (2) | C10—C9—C14—C13 | 1.7 (4) |
C7—N1—C3—C2 | 179.8 (3) | C8—C9—C14—C13 | −179.7 (3) |
Cu1—N1—C3—C2 | 6.5 (3) |
Symmetry code: (i) −x+1, −y+2, −z. |
Experimental details
Crystal data | |
Chemical formula | [Cu2(C14H12ClN2O)2Cl2] |
Mr | 717.39 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 298 |
a, b, c (Å) | 9.9703 (10), 9.0119 (11), 16.5018 (16) |
β (°) | 96.039 (1) |
V (Å3) | 1474.5 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 1.84 |
Crystal size (mm) | 0.50 × 0.42 × 0.02 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.460, 0.957 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7139, 2587, 2101 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.082, 1.05 |
No. of reflections | 2587 |
No. of parameters | 181 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.38, −0.32 |
Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
Cu1—O1i | 1.9547 (18) | Cu1—Cl2 | 2.3187 (9) |
Cu1—N2 | 1.958 (2) |
Symmetry code: (i) −x+1, −y+2, −z. |
Acknowledgements
The author thanks the Science and Educational Fund of Shaanxi Province for a research grant (No. 06k16-G16).
References
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Transition metal complexes containing Schiff base ligands have been of great interest for many years (Yamada, 1999). These complexes play an important role in the coordination chemistry related to catalysis and enzymatic reactions, magnetism and molecular architectures. The complexes of salicylaldehyde with polyamines and bis(phenoxo) bridged dinuclear copper(II) complexes are rare. As an extension of the work on the structural characterization of Schiff base complexes, the crystal structure of a mononuclear copper(II) compound, (I), is reported here.
The molecular structure of complex (I) is defined by two [CuLCl] units [4-chloro-2-pyridylethylamine-phenolato], which are bridged by two atoms from 5-Chlorosalicylaldehyde, in such a way as to define a central N2CuO2CuN2 core. Additionally, there is an Cl atom from CuCl2.2H2O completing the pentacoordination of each Cu atom, thus defining a slightly distorted square-based pyramidal coordination for the metal centres. The basal square of the pyramid is defined by two N atoms (N1 and N2) from 2-ethylaminopyridine and two O atoms from 5-Chlorosalicylaldehyde [O1 and O1A; symmetry code: (A)-x + 1, y, -z].
The Cu—Cl2 distance is 2.3187 (9) Å,, which is a rather long value for the normal length of this kind of bond (2.0512 Å). A similar value has been reported for [Cu2(/m-oxalato) (dipyridylamino)2(CH3—CN)2](ClO4)2 (Du et al., 2003). The Cu—Cu distance of 3.103 (9) Å is close to this kind of complex (Rojas et al., 2004). Consistently, the O—Cu—O1A angle is 78.44 (8) °. The atom sequence Cu—O1—Cu1A—O1A is a rather parallelogram. The Cu—O1 and Cu—O1A distances are 1.9547 (18) Å and 2.0500 (19) °, respectively.