Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807032709/cv2271sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807032709/cv2271Isup2.hkl |
CCDC reference: 627868
o-Phenylenediamine(0.5 mmol, 54.11 mg) was dissolved in hot methanol (10 ml) and added dropwise to a methanol solution (5 ml) of 2- hydroxy-1-naphthaldehyde (1 mmol, 172.19 mg). The mixture was then stirred at 323 K for 2 h. An aqueous solution (2 ml) of copper(II) acetate hydrate (0.5 mmol, 99.86 mg) was then added dropwise and the mixture stirred for another 5 h. The solution was held at room temperature for about one week, whereupon red prism-shaped crystals suitable for X-ray diffraction analysis were obtained.
All H atoms were placed in geometrically idealized positions (C—H 0.93 Å) and treated as riding on their parent atoms, with Uiso(H) = 1.2Ueq(C).
Schiff base complexes play an important role in coordination chemistry (Gamovski et al., 1993). In a continuation of a study of Schiff base ligands and their copper(II) complexes, we report here the title complex (Fig. 1), in which the Cu atom exists in a squareplanar geometry with the max deviation from the mean plane of 0.0713 Å. The Cu—N and Cu—O bond lengths are comparable to those observed in other copper(II) complexes (MacLachlan et al., 1996).
In the crystal, the molecules related by the centres of symmetry separated by the b/2 translation form stacks along the b axis with the short intermolecular distances C2···C20ii and C2···C12iii of 3.284 (8) and 3.298 (7) Å, respectively [symmetry codes: (ii) -x, 2 - y, -z; (iii) -x, 1 - y, -z]. In these stacks, the short Cu···Cuiii distances of 3.446 (3) Å are also observed in alternating pairs of the molecules. The weak intermolecular C—H···O hydrogen bonds (Table) contribute to the further packing stabilization.
For the general role of Schiff bases, see: Gamovski et al. (1993). For crystal structures of related complexes, see: MacLachlan et al. (1996).
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL.
Fig. 1. The molecular structure of (I), with atom labels and 30% probability displacement ellipsoids for non-H atoms. |
[Cu(C28H18N2O2)] | F(000) = 980 |
Mr = 477.98 | Dx = 1.575 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
a = 16.019 (13) Å | Cell parameters from 2054 reflections |
b = 7.764 (6) Å | θ = 2.9–27.9° |
c = 16.334 (14) Å | µ = 1.12 mm−1 |
β = 97.042 (13)° | T = 298 K |
V = 2016 (3) Å3 | Prism, red |
Z = 4 | 0.42 × 0.12 × 0.05 mm |
Bruker SMART CCD area-detector diffractometer | 3534 independent reflections |
Radiation source: fine-focus sealed tube | 2081 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.082 |
φ and ω scans | θmax = 25.0°, θmin = 1.7° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −18→19 |
Tmin = 0.652, Tmax = 0.946 | k = −9→9 |
8028 measured reflections | l = −8→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)] = 0.057 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0237P)2] where P = (Fo2 + 2Fc2)/3 |
3534 reflections | (Δ/σ)max < 0.001 |
298 parameters | Δρmax = 0.33 e Å−3 |
0 restraints | Δρmin = −0.42 e Å−3 |
[Cu(C28H18N2O2)] | V = 2016 (3) Å3 |
Mr = 477.98 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 16.019 (13) Å | µ = 1.12 mm−1 |
b = 7.764 (6) Å | T = 298 K |
c = 16.334 (14) Å | 0.42 × 0.12 × 0.05 mm |
β = 97.042 (13)° |
Bruker SMART CCD area-detector diffractometer | 3534 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2081 reflections with I > 2σ(I) |
Tmin = 0.652, Tmax = 0.946 | Rint = 0.082 |
8028 measured reflections |
R[F2 > 2σ(F2)] = 0.057 | 0 restraints |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.33 e Å−3 |
3534 reflections | Δρmin = −0.42 e Å−3 |
298 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 | 0.04588 (3) | 0.67783 (8) | 0.05014 (3) | 0.03463 (19) | |
N1 | −0.0368 (2) | 0.5873 (5) | 0.1135 (2) | 0.0304 (10) | |
N2 | −0.0482 (2) | 0.7732 (5) | −0.0191 (2) | 0.0311 (10) | |
O1 | 0.13543 (17) | 0.5793 (4) | 0.11874 (18) | 0.0366 (9) | |
O2 | 0.12563 (17) | 0.7745 (4) | −0.01174 (18) | 0.0431 (10) | |
C1 | −0.0211 (3) | 0.5039 (7) | 0.1831 (3) | 0.0336 (12) | |
H1 | −0.0671 | 0.4732 | 0.2097 | 0.040* | |
C2 | 0.0598 (3) | 0.4557 (6) | 0.2222 (3) | 0.0319 (12) | |
C3 | 0.1330 (3) | 0.4951 (6) | 0.1868 (3) | 0.0328 (12) | |
C4 | 0.2121 (3) | 0.4396 (7) | 0.2281 (3) | 0.0432 (14) | |
H4 | 0.2605 | 0.4608 | 0.2036 | 0.052* | |
C5 | 0.2192 (3) | 0.3577 (7) | 0.3012 (3) | 0.0412 (14) | |
H5 | 0.2722 | 0.3265 | 0.3265 | 0.049* | |
C6 | 0.1477 (3) | 0.3183 (7) | 0.3404 (3) | 0.0356 (12) | |
C7 | 0.0668 (3) | 0.3674 (6) | 0.3018 (3) | 0.0333 (12) | |
C8 | −0.0016 (3) | 0.3251 (8) | 0.3444 (3) | 0.0448 (13) | |
H8 | −0.0557 | 0.3546 | 0.3213 | 0.054* | |
C9 | 0.0089 (3) | 0.2416 (7) | 0.4192 (3) | 0.0552 (17) | |
H9 | −0.0375 | 0.2170 | 0.4463 | 0.066* | |
C10 | 0.0890 (3) | 0.1940 (8) | 0.4543 (3) | 0.0519 (15) | |
H10 | 0.0956 | 0.1351 | 0.5042 | 0.062* | |
C11 | 0.1574 (3) | 0.2319 (7) | 0.4169 (3) | 0.0453 (15) | |
H11 | 0.2108 | 0.2012 | 0.4415 | 0.054* | |
C12 | −0.0430 (3) | 0.8604 (6) | −0.0863 (3) | 0.0330 (12) | |
H12 | −0.0934 | 0.8969 | −0.1154 | 0.040* | |
C13 | 0.0317 (3) | 0.9054 (6) | −0.1198 (3) | 0.0317 (12) | |
C14 | 0.1123 (3) | 0.8555 (7) | −0.0810 (3) | 0.0350 (13) | |
C15 | 0.1849 (3) | 0.8980 (7) | −0.1200 (3) | 0.0465 (16) | |
H15 | 0.2376 | 0.8602 | −0.0965 | 0.056* | |
C16 | 0.1787 (3) | 0.9919 (7) | −0.1900 (3) | 0.0432 (14) | |
H16 | 0.2274 | 1.0185 | −0.2131 | 0.052* | |
C17 | 0.0997 (3) | 1.0516 (7) | −0.2298 (3) | 0.0384 (13) | |
C18 | 0.0255 (3) | 1.0059 (7) | −0.1964 (3) | 0.0350 (13) | |
C19 | −0.0513 (3) | 1.0648 (7) | −0.2389 (3) | 0.0418 (14) | |
H19 | −0.1014 | 1.0359 | −0.2190 | 0.050* | |
C20 | −0.0540 (3) | 1.1632 (8) | −0.3086 (3) | 0.0482 (14) | |
H20 | −0.1057 | 1.1984 | −0.3356 | 0.058* | |
C21 | 0.0196 (3) | 1.2111 (7) | −0.3396 (3) | 0.0511 (16) | |
H21 | 0.0175 | 1.2808 | −0.3861 | 0.061* | |
C22 | 0.0946 (3) | 1.1549 (7) | −0.3012 (3) | 0.0448 (14) | |
H22 | 0.1438 | 1.1854 | −0.3225 | 0.054* | |
C23 | −0.1208 (3) | 0.6324 (6) | 0.0809 (3) | 0.0307 (12) | |
C24 | −0.1263 (3) | 0.7353 (6) | 0.0086 (3) | 0.0320 (13) | |
C25 | −0.2044 (3) | 0.7904 (7) | −0.0266 (3) | 0.0416 (14) | |
H25 | −0.2085 | 0.8588 | −0.0737 | 0.050* | |
C26 | −0.2761 (3) | 0.7462 (7) | 0.0064 (3) | 0.0475 (16) | |
H26 | −0.3284 | 0.7839 | −0.0181 | 0.057* | |
C27 | −0.2700 (3) | 0.6452 (7) | 0.0765 (3) | 0.0485 (15) | |
H27 | −0.3184 | 0.6162 | 0.0996 | 0.058* | |
C28 | −0.1933 (3) | 0.5872 (7) | 0.1123 (3) | 0.0417 (14) | |
H28 | −0.1904 | 0.5163 | 0.1584 | 0.050* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.0257 (3) | 0.0397 (4) | 0.0389 (3) | −0.0006 (3) | 0.0054 (2) | −0.0010 (4) |
N1 | 0.024 (2) | 0.032 (3) | 0.035 (2) | −0.0032 (18) | 0.0045 (18) | −0.001 (2) |
N2 | 0.025 (2) | 0.035 (3) | 0.033 (2) | −0.0033 (18) | 0.0060 (17) | 0.0003 (19) |
O1 | 0.0248 (18) | 0.044 (3) | 0.0412 (18) | −0.0052 (15) | 0.0047 (15) | 0.0049 (17) |
O2 | 0.0286 (18) | 0.057 (3) | 0.0448 (19) | 0.0001 (16) | 0.0087 (15) | 0.0111 (18) |
C1 | 0.028 (3) | 0.038 (4) | 0.037 (3) | −0.004 (2) | 0.011 (2) | −0.004 (3) |
C2 | 0.026 (3) | 0.034 (3) | 0.036 (3) | 0.002 (2) | 0.005 (2) | −0.003 (2) |
C3 | 0.028 (3) | 0.031 (3) | 0.040 (3) | −0.002 (2) | 0.007 (2) | −0.008 (3) |
C4 | 0.023 (3) | 0.052 (4) | 0.055 (3) | −0.001 (2) | 0.008 (2) | 0.005 (3) |
C5 | 0.027 (3) | 0.041 (4) | 0.053 (3) | 0.002 (3) | −0.002 (2) | −0.001 (3) |
C6 | 0.033 (3) | 0.034 (3) | 0.041 (3) | 0.000 (3) | 0.005 (2) | −0.002 (3) |
C7 | 0.034 (3) | 0.027 (4) | 0.039 (3) | −0.003 (2) | 0.007 (2) | −0.007 (2) |
C8 | 0.031 (3) | 0.061 (4) | 0.043 (3) | 0.004 (3) | 0.004 (2) | 0.004 (3) |
C9 | 0.044 (3) | 0.071 (5) | 0.052 (3) | 0.007 (3) | 0.011 (3) | 0.009 (3) |
C10 | 0.047 (3) | 0.068 (5) | 0.041 (3) | 0.001 (3) | 0.007 (3) | 0.009 (3) |
C11 | 0.040 (3) | 0.048 (4) | 0.047 (3) | 0.006 (3) | 0.001 (3) | 0.007 (3) |
C12 | 0.025 (3) | 0.037 (4) | 0.037 (3) | −0.001 (2) | 0.003 (2) | −0.012 (3) |
C13 | 0.029 (3) | 0.036 (3) | 0.030 (3) | −0.005 (2) | 0.004 (2) | −0.006 (2) |
C14 | 0.029 (3) | 0.039 (4) | 0.039 (3) | −0.003 (2) | 0.007 (2) | −0.003 (3) |
C15 | 0.027 (3) | 0.067 (5) | 0.048 (3) | 0.004 (3) | 0.015 (2) | 0.000 (3) |
C16 | 0.030 (3) | 0.058 (4) | 0.046 (3) | −0.002 (3) | 0.021 (2) | −0.007 (3) |
C17 | 0.039 (3) | 0.040 (4) | 0.037 (3) | 0.000 (3) | 0.012 (2) | −0.010 (3) |
C18 | 0.038 (3) | 0.036 (4) | 0.032 (3) | −0.004 (3) | 0.010 (2) | −0.013 (2) |
C19 | 0.036 (3) | 0.050 (4) | 0.041 (3) | 0.001 (3) | 0.009 (2) | 0.002 (3) |
C20 | 0.047 (3) | 0.052 (4) | 0.045 (3) | 0.006 (3) | 0.003 (3) | 0.000 (3) |
C21 | 0.065 (4) | 0.050 (5) | 0.040 (3) | 0.004 (3) | 0.012 (3) | 0.003 (3) |
C22 | 0.050 (3) | 0.048 (4) | 0.041 (3) | −0.008 (3) | 0.023 (2) | −0.006 (3) |
C23 | 0.019 (2) | 0.035 (4) | 0.037 (3) | −0.003 (2) | 0.003 (2) | −0.004 (2) |
C24 | 0.024 (3) | 0.037 (4) | 0.036 (3) | 0.000 (2) | 0.005 (2) | −0.007 (2) |
C25 | 0.029 (3) | 0.056 (4) | 0.039 (3) | 0.001 (3) | 0.000 (2) | 0.010 (3) |
C26 | 0.027 (3) | 0.067 (5) | 0.047 (3) | 0.002 (3) | 0.001 (2) | 0.003 (3) |
C27 | 0.027 (3) | 0.068 (5) | 0.052 (3) | −0.005 (3) | 0.010 (2) | 0.004 (3) |
C28 | 0.026 (3) | 0.051 (4) | 0.048 (3) | −0.005 (2) | 0.006 (2) | 0.004 (3) |
Cu1—O1 | 1.872 (3) | C12—C13 | 1.419 (6) |
Cu1—O2 | 1.880 (3) | C12—H12 | 0.9300 |
Cu1—N1 | 1.913 (4) | C13—C14 | 1.421 (6) |
Cu1—N2 | 1.919 (4) | C13—C18 | 1.467 (6) |
N1—C1 | 1.306 (5) | C14—C15 | 1.431 (6) |
N1—C23 | 1.428 (5) | C15—C16 | 1.350 (6) |
N2—C12 | 1.300 (5) | C15—H15 | 0.9300 |
N2—C24 | 1.413 (5) | C16—C17 | 1.427 (6) |
O1—C3 | 1.295 (5) | C16—H16 | 0.9300 |
O2—C14 | 1.289 (5) | C17—C22 | 1.410 (6) |
C1—C2 | 1.422 (6) | C17—C18 | 1.413 (6) |
C1—H1 | 0.9300 | C18—C19 | 1.413 (6) |
C2—C3 | 1.404 (6) | C19—C20 | 1.367 (6) |
C2—C7 | 1.463 (6) | C19—H19 | 0.9300 |
C3—C4 | 1.426 (6) | C20—C21 | 1.390 (6) |
C4—C5 | 1.346 (6) | C20—H20 | 0.9300 |
C4—H4 | 0.9300 | C21—C22 | 1.358 (6) |
C5—C6 | 1.412 (6) | C21—H21 | 0.9300 |
C5—H5 | 0.9300 | C22—H22 | 0.9300 |
C6—C11 | 1.409 (6) | C23—C28 | 1.372 (6) |
C6—C7 | 1.423 (6) | C23—C24 | 1.419 (6) |
C7—C8 | 1.407 (6) | C24—C25 | 1.380 (5) |
C8—C9 | 1.375 (6) | C25—C26 | 1.372 (6) |
C8—H8 | 0.9300 | C25—H25 | 0.9300 |
C9—C10 | 1.388 (6) | C26—C27 | 1.381 (6) |
C9—H9 | 0.9300 | C26—H26 | 0.9300 |
C10—C11 | 1.352 (6) | C27—C28 | 1.370 (6) |
C10—H10 | 0.9300 | C27—H27 | 0.9300 |
C11—H11 | 0.9300 | C28—H28 | 0.9300 |
O1—Cu1—O2 | 87.91 (14) | C13—C12—H12 | 116.6 |
O1—Cu1—N1 | 93.25 (15) | C12—C13—C14 | 121.6 (4) |
O2—Cu1—N1 | 178.02 (17) | C12—C13—C18 | 119.2 (4) |
O1—Cu1—N2 | 178.18 (16) | C14—C13—C18 | 119.2 (4) |
O2—Cu1—N2 | 93.75 (16) | O2—C14—C13 | 124.6 (4) |
N1—Cu1—N2 | 85.10 (17) | O2—C14—C15 | 116.6 (4) |
C1—N1—C23 | 121.2 (4) | C13—C14—C15 | 118.8 (4) |
C1—N1—Cu1 | 125.5 (3) | C16—C15—C14 | 121.5 (5) |
C23—N1—Cu1 | 113.0 (3) | C16—C15—H15 | 119.3 |
C12—N2—C24 | 122.0 (4) | C14—C15—H15 | 119.3 |
C12—N2—Cu1 | 124.8 (3) | C15—C16—C17 | 122.0 (5) |
C24—N2—Cu1 | 113.1 (3) | C15—C16—H16 | 119.0 |
C3—O1—Cu1 | 128.3 (3) | C17—C16—H16 | 119.0 |
C14—O2—Cu1 | 128.1 (3) | C22—C17—C18 | 119.8 (5) |
N1—C1—C2 | 126.1 (4) | C22—C17—C16 | 121.3 (5) |
N1—C1—H1 | 117.0 | C18—C17—C16 | 118.9 (5) |
C2—C1—H1 | 117.0 | C17—C18—C19 | 116.9 (5) |
C3—C2—C1 | 121.3 (4) | C17—C18—C13 | 119.4 (4) |
C3—C2—C7 | 119.4 (4) | C19—C18—C13 | 123.7 (4) |
C1—C2—C7 | 119.2 (4) | C20—C19—C18 | 121.8 (5) |
O1—C3—C2 | 125.3 (4) | C20—C19—H19 | 119.1 |
O1—C3—C4 | 116.1 (4) | C18—C19—H19 | 119.1 |
C2—C3—C4 | 118.6 (4) | C19—C20—C21 | 120.7 (5) |
C5—C4—C3 | 122.4 (5) | C19—C20—H20 | 119.6 |
C5—C4—H4 | 118.8 | C21—C20—H20 | 119.6 |
C3—C4—H4 | 118.8 | C22—C21—C20 | 119.2 (5) |
C4—C5—C6 | 121.4 (4) | C22—C21—H21 | 120.4 |
C4—C5—H5 | 119.3 | C20—C21—H21 | 120.4 |
C6—C5—H5 | 119.3 | C21—C22—C17 | 121.5 (5) |
C11—C6—C5 | 119.8 (4) | C21—C22—H22 | 119.2 |
C11—C6—C7 | 121.1 (4) | C17—C22—H22 | 119.2 |
C5—C6—C7 | 119.1 (4) | C28—C23—C24 | 119.0 (4) |
C8—C7—C6 | 116.2 (4) | C28—C23—N1 | 126.9 (4) |
C8—C7—C2 | 124.7 (4) | C24—C23—N1 | 114.1 (4) |
C6—C7—C2 | 119.1 (4) | C25—C24—N2 | 126.5 (4) |
C9—C8—C7 | 122.1 (4) | C25—C24—C23 | 118.8 (4) |
C9—C8—H8 | 119.0 | N2—C24—C23 | 114.6 (4) |
C7—C8—H8 | 119.0 | C26—C25—C24 | 121.3 (5) |
C8—C9—C10 | 119.9 (5) | C26—C25—H25 | 119.4 |
C8—C9—H9 | 120.0 | C24—C25—H25 | 119.4 |
C10—C9—H9 | 120.0 | C25—C26—C27 | 119.4 (5) |
C11—C10—C9 | 121.0 (5) | C25—C26—H26 | 120.3 |
C11—C10—H10 | 119.5 | C27—C26—H26 | 120.3 |
C9—C10—H10 | 119.5 | C28—C27—C26 | 120.6 (5) |
C10—C11—C6 | 119.8 (5) | C28—C27—H27 | 119.7 |
C10—C11—H11 | 120.1 | C26—C27—H27 | 119.7 |
C6—C11—H11 | 120.1 | C27—C28—C23 | 120.9 (5) |
N2—C12—C13 | 126.8 (4) | C27—C28—H28 | 119.6 |
N2—C12—H12 | 116.6 | C23—C28—H28 | 119.6 |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5···O1i | 0.93 | 2.52 | 3.326 (6) | 145 |
Symmetry code: (i) −x+1/2, y−1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | [Cu(C28H18N2O2)] |
Mr | 477.98 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 298 |
a, b, c (Å) | 16.019 (13), 7.764 (6), 16.334 (14) |
β (°) | 97.042 (13) |
V (Å3) | 2016 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.12 |
Crystal size (mm) | 0.42 × 0.12 × 0.05 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.652, 0.946 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8028, 3534, 2081 |
Rint | 0.082 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.057, 0.102, 1.00 |
No. of reflections | 3534 |
No. of parameters | 298 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.33, −0.42 |
Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SAINT, SHELXS97 (Sheldrick, 1997a), SHELXL97 (Sheldrick, 1997a), SHELXTL (Sheldrick, 1997b), SHELXTL.
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5···O1i | 0.93 | 2.52 | 3.326 (6) | 145 |
Symmetry code: (i) −x+1/2, y−1/2, −z+1/2. |
Schiff base complexes play an important role in coordination chemistry (Gamovski et al., 1993). In a continuation of a study of Schiff base ligands and their copper(II) complexes, we report here the title complex (Fig. 1), in which the Cu atom exists in a squareplanar geometry with the max deviation from the mean plane of 0.0713 Å. The Cu—N and Cu—O bond lengths are comparable to those observed in other copper(II) complexes (MacLachlan et al., 1996).
In the crystal, the molecules related by the centres of symmetry separated by the b/2 translation form stacks along the b axis with the short intermolecular distances C2···C20ii and C2···C12iii of 3.284 (8) and 3.298 (7) Å, respectively [symmetry codes: (ii) -x, 2 - y, -z; (iii) -x, 1 - y, -z]. In these stacks, the short Cu···Cuiii distances of 3.446 (3) Å are also observed in alternating pairs of the molecules. The weak intermolecular C—H···O hydrogen bonds (Table) contribute to the further packing stabilization.