Bis{μ-2-[(pyridin-2-yl)imino­meth­yl]phenolato}bis­[(2-formyl­phenolato)copper(II)]

Chang, H.-C.; Cole, J.M.; Lin, T.-C.; Sylvester, S.O.; Waddell, P.G.

doi:10.1107/S1600536811015674

metal-organic compounds

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ISSN: 2056-9890

Volume 67| Part 6| June 2011| Page m690

doi:10.1107/S1600536811015674

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Bis{μ-2-[(pyridin-2-yl)iminomethyl]phenolato}bis[(2-formylphenolato)copper(II)]

Hui-Chang Chang,^a Jacqueline M. Cole,^a ^*‡ Tze-Chia Lin,^a Sven O. Sylvester ^a and Paul G. Waddell ^a ‡

^aCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, England
^*Correspondence e-mail: jmc61@cam.ac.uk

(Received 23 February 2011; accepted 26 April 2011; online 7 May 2011)

The asymmetric unit of the title compound, [Cu₂(C₁₂H₉N₂O)₂(C₇H₅O₂)₂], contains two independent (2-formylphenolato){2-[(pyridin-2-yl)iminomethyl]phenolato}copper(II) molecules that form pseudocentrosymmetric dimers via interactions between the Cu and pyridyl N atoms of independent monomers. The square-planar geometry of the Cu atoms in the monomer thus becomes square-based pyramidal in the dimer. The crystal studied was an inversion twin, with unequal populations of 0.353 (17) and 0.647 (17).

Related literature

For related structures containing the salicylaldehyde ligand, see: McKinnon et al. (1964 ); Hall et al. (1965 ). For a related structure containing the (2-pyridylsalicylaldimine) ligand, see: Drummond & Wood (1972 ).

Experimental

Crystal data

[Cu₂(C₁₂H₉N₂O)₂(C₇H₅O₂)₂]
M_r = 763.72
Orthorhombic, P 2₁ 2₁ 2₁
a = 8.9811 (18) Å
b = 18.856 (4) Å
c = 19.612 (4) Å
V = 3321.2 (12) Å³
Z = 4
Mo Kα radiation
μ = 1.34 mm⁻¹
T = 150 K
0.20 × 0.12 × 0.06 mm

Data collection

Rigaku Saturn724+ diffractometer
Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ) T_min = 0.736, T_max = 1
33976 measured reflections
6782 independent reflections
6545 reflections with I > 2σ(I)
R_int = 0.076

Refinement

R[F² > 2σ(F²)] = 0.057
wR(F²) = 0.106
S = 1.20
6782 reflections
452 parameters
H-atom parameters constrained
Δρ_max = 0.39 e Å⁻³
Δρ_min = −0.41 e Å⁻³
Absolute structure: Flack (1983 ), 2964 Friedel pairs
Flack parameter: 0.353 (17)

Data collection: CrystalClear (Rigaku, 2008 ); cell refinement: CrystalClear; data reduction: CrystalClear; 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: WinGX (Farrugia, 1999 ).

Supporting information

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536811015674/pk2308sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536811015674/pk2308Isup2.hkl

checkCIF report

Comment top

The title compound forms dimers in which the monomer units are related by a non-crystallographic inversion operation. Intermolecular contacts are present between the copper(II) atoms and pyridyl nitrogen atoms (2.482 (4)Å and 2.469 (4) Å) with angles between the Cu—N contact and the plane of the pyridyl group observed to be 157.1 (5)° and 150.4 (5)°. These contacts appear to be the predominant cause of dimer formation since there is no evidence for any other significant intermolecular interactions. The bonding between the salicylaldehyde ligand and the copper atom can be compared to the two known polymorphs of homoleptic bissalicylaldehydatocopper(II), one described with the symmetry of P2₁/n (McKinnon et al., 1964), and the other as P2₁/c (Hall et al., 1965). The Cu—O bonds Cu1—O2 and Cu2—O5 in the title compound are observed to be 1.917 (3)Å and 1.918 (3)Å respectively, which is longer than the values of the equivalent bonds in the two polymorphs of bissalicylaldehydatocopper(II) where Cu—O1 is 1.86Å in the P2₁/n polymorph and 1.90Å in the P2₁/c polymorph. The Cu—O bonds Cu1—O3 and Cu2—O6 in the title compound are observed to be 2.022 (3)Å and 2.019 (3)Å respectively, also longer than the values of the equivalent bonds in the two polymorphs of bissalicylaldehydatocopper(II) where Cu—O2 is 1.98Å in the P2₁/n polymorph and 1.94Å in the P2₁/c polymorph. Additionally, the ligand bite-angles O2—Cu1—O3 and O5—Cu2—O6 are observed to be 91.05 (14)° and 90.89 (14)° respectively, lower than the equivalent angle O1—Cu—O2 in both of the known polymorphs of bissalicylaldehydatocopper(II), which are observed to be 94.8° in the P2₁/n polymorph and 95° in the P2₁/c polymorph. Bond distances from the copper atom to the 2-pyridylsalicylaldimine ligand are observed to be smaller than observed in a (2-pyridylsalicylaldimine)copper(I) tetramer (Drummond et al., 1972). In the title compound the bond lengths Cu1—O1 and Cu2—O4 are observed to be 1.916 (4)Å and 1.914 (3)Å respectively, shorter than the equivalent bond length Cu1—O1 in the (2-pyridylsalicylaldimine) copper(I) tetramer which is observed to be 1.965 (6) Å. The Cu1—N1 and Cu2—N3 bond lengths in the title compound, which are observed to be 2.022 (4)Å and 2.022 (4)Å respectively, can be compared to the equivalent bond length Cu1—N1 in the (2-pyridylsalicylaldimine) copper(I) tetramer, which is observed to be 1.975 (8) Å, shorter than those observed in the title compound. These differences can be attributed to the lower oxidation state of copper in the (2-pyridylsalicylaldimine) copper(I) tetramer compared to that in the title compound.

Related literature top

For related structures containing the salicylaldehyde ligand, see: McKinnon et al. (1964); Hall et al. (1965). For a related structure containing the (2-pyridylsalicylaldimine) ligand, see: Drummond et al. (1972).

Experimental top

A suspension of bis(2-pyridylsalicylaldimine)copper(II) (1 mg, 0.0022 mmol) in methanol (ca. 3 ml) was heated to ca. 323 K until fully dissolved. The solution was then allowed to cool to room temperature. Crystals suitable for single-crystal X-ray crystallography were grown via slow evaporation of methanol over seven days.

Computing details top

Data collection: CrystalClear (Rigaku, 2008); cell refinement: CrystalClear (Rigaku, 2008); data reduction: CrystalClear (Rigaku, 2008); 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: WinGX (Farrugia, 1999).

Figures top

Fig. 1. The structure of the asymmetric unit of the title compound with displacement ellipsoids drawn at the 50% probability level.

Bis{µ-2-[(pyridin-2-yl)iminomethyl]phenolato}bis[(2- formylphenolato)copper(II)] top

Crystal data top

[Cu₂(C₁₂H₉N₂O)₂(C₇H₅O₂)₂]	F(000) = 1560
M_r = 763.72	D_x = 1.527 Mg m⁻³
Orthorhombic, P2₁2₁2₁	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ac 2ab	Cell parameters from 9105 reflections
a = 8.9811 (18) Å	θ = 2.1–30.4°
b = 18.856 (4) Å	µ = 1.34 mm⁻¹
c = 19.612 (4) Å	T = 150 K
V = 3321.2 (12) Å³	Prism, yellow
Z = 4	0.20 × 0.12 × 0.06 mm

Data collection top

Rigaku Saturn724+ diffractometer	6782 independent reflections
Graphite monochromator	6545 reflections with I > 2σ(I)
Detector resolution: 28.6 pixels mm^-1	R_int = 0.076
ω scans	θ_max = 26.4°, θ_min = 3.1°
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	h = −11→10
T_min = 0.736, T_max = 1	k = −23→22
33976 measured reflections	l = −23→24

Refinement top

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)] = 0.057	H-atom parameters constrained
wR(F²) = 0.106	w = 1/[σ²(F_o²) + (0.0194P)² + 4.0051P] where P = (F_o² + 2F_c²)/3
S = 1.20	(Δ/σ)_max = 0.001
6782 reflections	Δρ_max = 0.39 e Å⁻³
452 parameters	Δρ_min = −0.41 e Å⁻³
0 restraints	Absolute structure: Flack (1983), 2964 Friedel pairs
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: 0.353 (17)

Crystal data top

[Cu₂(C₁₂H₉N₂O)₂(C₇H₅O₂)₂]	V = 3321.2 (12) Å³
M_r = 763.72	Z = 4
Orthorhombic, P2₁2₁2₁	Mo Kα radiation
a = 8.9811 (18) Å	µ = 1.34 mm⁻¹
b = 18.856 (4) Å	T = 150 K
c = 19.612 (4) Å	0.20 × 0.12 × 0.06 mm

Data collection top

Rigaku Saturn724+ diffractometer	6782 independent reflections
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	6545 reflections with I > 2σ(I)
T_min = 0.736, T_max = 1	R_int = 0.076
33976 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.057	H-atom parameters constrained
wR(F²) = 0.106	Δρ_max = 0.39 e Å⁻³
S = 1.20	Δρ_min = −0.41 e Å⁻³
6782 reflections	Absolute structure: Flack (1983), 2964 Friedel pairs
452 parameters	Absolute structure parameter: 0.353 (17)
0 restraints

Special details top

Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
Cu1	0.18124 (6)	0.99821 (3)	0.80722 (3)	0.02880 (13)
Cu2	0.34241 (6)	0.77028 (3)	0.70000 (3)	0.02792 (13)
O2	0.0380 (4)	0.99272 (19)	0.73492 (16)	0.0324 (8)
N3	0.1713 (5)	0.80580 (19)	0.75822 (18)	0.0234 (8)
N1	0.3472 (5)	0.9601 (2)	0.74793 (18)	0.0254 (8)
O4	0.2110 (4)	0.74573 (18)	0.62687 (16)	0.0323 (8)
O6	0.5021 (4)	0.7284 (2)	0.63978 (16)	0.0347 (8)
C31	0.8313 (6)	0.6798 (3)	0.7383 (3)	0.0348 (11)
H31	0.8822	0.6595	0.7019	0.042*
O1	0.3198 (4)	1.02568 (18)	0.87665 (17)	0.0375 (9)
O3	0.0291 (4)	1.0429 (2)	0.86985 (17)	0.0354 (8)
C1	0.4496 (5)	0.9962 (3)	0.8891 (2)	0.0322 (11)
O5	0.4773 (4)	0.77314 (19)	0.77578 (15)	0.0312 (7)
C17	0.2743 (6)	0.9990 (3)	0.5662 (2)	0.0391 (12)
H17	0.2379	1.0355	0.539	0.047*
C25	0.0007 (5)	0.8201 (3)	0.6601 (2)	0.0258 (10)
C15	0.3331 (6)	0.9506 (2)	0.6754 (2)	0.0270 (10)
C20	0.0858 (5)	0.7781 (3)	0.6120 (2)	0.0272 (10)
C30	0.8958 (6)	0.6803 (3)	0.8016 (3)	0.0407 (12)
H30	0.9898	0.6608	0.8083	0.049*
C21	0.0235 (6)	0.7718 (3)	0.5450 (2)	0.0348 (11)
H21	0.0741	0.7453	0.5124	0.042*
C13	−0.1640 (6)	1.0600 (2)	0.7855 (2)	0.0300 (10)
C3	0.6615 (7)	0.9818 (3)	0.9673 (3)	0.0501 (15)
H3	0.708	0.9937	1.0081	0.06*
C33	0.6283 (6)	0.7067 (3)	0.6591 (3)	0.0343 (12)
H33	0.6893	0.6868	0.626	0.041*
C27	0.6080 (5)	0.7423 (3)	0.7829 (3)	0.0309 (11)
C28	0.6772 (6)	0.7409 (3)	0.8474 (2)	0.0366 (11)
H28	0.6281	0.7604	0.8847	0.044*
C18	0.3240 (6)	0.9365 (3)	0.5366 (2)	0.0391 (12)
H18	0.3243	0.9307	0.4895	0.047*
C6	0.5217 (5)	0.9478 (3)	0.8436 (2)	0.0287 (11)
C7	0.4716 (6)	0.9365 (3)	0.7743 (2)	0.0302 (11)
H7	0.5333	0.9101	0.746	0.036*
C2	0.5278 (6)	1.0136 (3)	0.9505 (3)	0.0443 (14)
H2	0.4875	1.0472	0.9799	0.053*
C26	0.0461 (5)	0.8277 (2)	0.7302 (2)	0.0247 (10)
H26	−0.0205	0.8507	0.7589	0.03*
C16	0.2791 (5)	1.0069 (3)	0.6366 (2)	0.0318 (11)
H16	0.2473	1.0487	0.6573	0.038*
C5	0.6610 (6)	0.9168 (3)	0.8619 (3)	0.0353 (11)
H5	0.7075	0.8858	0.8317	0.042*
C32	0.6868 (6)	0.7099 (2)	0.7272 (2)	0.0276 (10)
C14	−0.0977 (6)	1.0650 (3)	0.8514 (3)	0.0355 (12)
H14	−0.1545	1.0871	0.8849	0.043*
N4	0.1434 (4)	0.8785 (2)	0.85692 (18)	0.0282 (9)
C23	−0.1931 (6)	0.8431 (3)	0.5754 (2)	0.0316 (11)
H23	−0.2834	0.8638	0.5633	0.038*
N2	0.3766 (4)	0.8885 (2)	0.64818 (19)	0.0294 (9)
C24	−0.1378 (5)	0.8501 (2)	0.6410 (2)	0.0267 (10)
H24	−0.1929	0.8749	0.6733	0.032*
C38	0.1394 (6)	0.8842 (3)	0.9252 (2)	0.0347 (12)
H38	0.1143	0.9279	0.9441	0.042*
C29	0.8168 (6)	0.7110 (3)	0.8563 (3)	0.0374 (12)
H29	0.8595	0.7112	0.8995	0.045*
C9	−0.1666 (6)	1.0256 (2)	0.6661 (2)	0.0330 (11)
H9	−0.1206	1.0052	0.6283	0.04*
C10	−0.3053 (6)	1.0558 (3)	0.6585 (3)	0.0423 (13)
H10	−0.3515	1.0543	0.6161	0.051*
C34	0.1807 (5)	0.8147 (2)	0.8304 (2)	0.0261 (10)
C22	−0.1100 (6)	0.8042 (3)	0.5273 (3)	0.0379 (13)
H22	−0.1452	0.8	0.4829	0.045*
C19	0.3730 (5)	0.8830 (3)	0.5794 (2)	0.0322 (11)
H19	0.4054	0.8408	0.5597	0.039*
C36	0.2157 (7)	0.7636 (3)	0.9410 (3)	0.0461 (15)
H36	0.2403	0.7257	0.9691	0.055*
C35	0.2229 (6)	0.7568 (3)	0.8709 (2)	0.0340 (12)
H35	0.2551	0.7148	0.851	0.041*
C8	−0.0916 (5)	1.0247 (2)	0.7303 (2)	0.0269 (10)
C4	0.7286 (6)	0.9319 (3)	0.9240 (3)	0.0433 (14)
H4	0.8166	0.9094	0.9366	0.052*
C11	−0.3798 (6)	1.0892 (3)	0.7140 (3)	0.0407 (14)
H11	−0.474	1.1089	0.7087	0.049*
C12	−0.3068 (6)	1.0911 (2)	0.7758 (3)	0.0378 (13)
H12	−0.3525	1.1136	0.8124	0.045*
C37	0.1707 (7)	0.8285 (3)	0.9690 (2)	0.0434 (13)
H37	0.1621	0.8341	1.016	0.052*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cu1	0.0285 (3)	0.0316 (3)	0.0263 (3)	0.0020 (3)	0.0013 (3)	−0.0047 (3)
Cu2	0.0274 (3)	0.0311 (3)	0.0253 (3)	0.0031 (2)	0.0006 (3)	−0.0039 (2)
O2	0.0307 (18)	0.0324 (19)	0.0341 (18)	0.0088 (16)	−0.0011 (14)	−0.0055 (16)
N3	0.023 (2)	0.0243 (19)	0.0230 (18)	−0.0007 (17)	0.0021 (18)	−0.0017 (15)
N1	0.028 (2)	0.026 (2)	0.0216 (18)	−0.0002 (18)	0.0025 (18)	0.0029 (15)
O4	0.0283 (18)	0.038 (2)	0.0305 (18)	0.0045 (15)	−0.0007 (14)	−0.0087 (15)
O6	0.0349 (19)	0.039 (2)	0.0298 (18)	0.0015 (17)	0.0035 (15)	−0.0071 (17)
C31	0.028 (3)	0.028 (3)	0.049 (3)	0.005 (2)	0.006 (3)	0.006 (2)
O1	0.034 (2)	0.044 (2)	0.0344 (19)	0.0005 (17)	0.0016 (17)	−0.0126 (15)
O3	0.034 (2)	0.041 (2)	0.0313 (19)	0.0075 (17)	0.0045 (16)	−0.0032 (16)
C1	0.034 (3)	0.038 (3)	0.024 (2)	−0.003 (2)	0.0014 (19)	−0.003 (2)
O5	0.0316 (17)	0.0340 (19)	0.0280 (17)	0.0060 (16)	−0.0017 (14)	−0.0036 (15)
C17	0.040 (3)	0.042 (3)	0.035 (3)	−0.001 (3)	0.000 (2)	0.012 (3)
C25	0.025 (2)	0.028 (3)	0.025 (2)	−0.0067 (19)	0.0025 (19)	−0.0025 (19)
C15	0.024 (2)	0.033 (2)	0.025 (2)	−0.002 (2)	0.003 (2)	−0.0017 (18)
C20	0.034 (3)	0.024 (2)	0.024 (2)	0.001 (2)	0.006 (2)	0.001 (2)
C30	0.034 (3)	0.028 (3)	0.060 (3)	0.005 (2)	−0.001 (3)	0.010 (3)
C21	0.036 (3)	0.043 (3)	0.025 (2)	0.000 (2)	−0.003 (2)	−0.007 (2)
C13	0.026 (2)	0.025 (2)	0.039 (3)	−0.001 (2)	0.002 (2)	0.0011 (19)
C3	0.045 (3)	0.073 (4)	0.032 (3)	−0.009 (3)	−0.005 (3)	0.001 (3)
C33	0.031 (3)	0.032 (3)	0.040 (3)	0.002 (2)	0.008 (2)	−0.005 (2)
C27	0.033 (3)	0.022 (2)	0.037 (3)	−0.0062 (19)	0.004 (2)	0.004 (2)
C28	0.036 (3)	0.038 (3)	0.036 (3)	0.001 (3)	−0.003 (2)	0.001 (2)
C18	0.042 (3)	0.051 (3)	0.024 (2)	0.006 (3)	0.003 (3)	−0.002 (2)
C6	0.029 (3)	0.028 (3)	0.029 (2)	−0.005 (2)	0.001 (2)	0.002 (2)
C7	0.030 (3)	0.023 (2)	0.037 (3)	−0.002 (2)	0.005 (2)	0.001 (2)
C2	0.048 (3)	0.055 (4)	0.030 (3)	−0.004 (3)	−0.001 (2)	−0.010 (3)
C26	0.025 (2)	0.023 (2)	0.026 (2)	−0.0013 (19)	0.0034 (19)	−0.0048 (19)
C16	0.034 (3)	0.027 (3)	0.035 (2)	0.000 (2)	0.006 (2)	0.001 (2)
C5	0.031 (3)	0.037 (3)	0.037 (3)	−0.002 (2)	−0.001 (3)	0.007 (2)
C32	0.029 (2)	0.021 (2)	0.033 (2)	−0.0026 (19)	0.006 (2)	0.0026 (18)
C14	0.038 (3)	0.031 (3)	0.037 (3)	0.000 (2)	0.014 (2)	−0.002 (2)
N4	0.030 (2)	0.031 (2)	0.0240 (18)	−0.0013 (17)	0.0035 (17)	0.0006 (16)
C23	0.029 (3)	0.031 (3)	0.035 (3)	−0.002 (2)	−0.003 (2)	−0.002 (2)
N2	0.027 (2)	0.035 (2)	0.027 (2)	0.0006 (17)	0.0028 (16)	−0.0009 (18)
C24	0.028 (3)	0.024 (2)	0.028 (2)	−0.0013 (19)	0.005 (2)	−0.0018 (19)
C38	0.036 (3)	0.041 (3)	0.027 (2)	−0.004 (2)	−0.006 (2)	−0.005 (2)
C29	0.037 (3)	0.034 (3)	0.040 (3)	−0.004 (2)	−0.009 (3)	0.012 (2)
C9	0.033 (3)	0.029 (2)	0.037 (3)	−0.002 (2)	0.001 (2)	−0.0013 (19)
C10	0.040 (3)	0.031 (3)	0.056 (3)	−0.002 (2)	−0.014 (3)	0.007 (2)
C34	0.022 (2)	0.032 (2)	0.024 (2)	−0.003 (2)	−0.001 (2)	0.0017 (18)
C22	0.039 (3)	0.046 (3)	0.028 (3)	−0.011 (2)	−0.006 (2)	−0.001 (2)
C19	0.033 (3)	0.036 (3)	0.028 (2)	0.002 (2)	0.003 (2)	−0.003 (2)
C36	0.059 (4)	0.050 (4)	0.029 (3)	0.000 (3)	−0.010 (3)	0.013 (3)
C35	0.038 (3)	0.034 (3)	0.029 (2)	0.005 (2)	0.000 (2)	0.002 (2)
C8	0.026 (2)	0.022 (2)	0.032 (3)	−0.0022 (18)	0.001 (2)	0.0059 (19)
C4	0.034 (3)	0.063 (4)	0.034 (3)	−0.004 (3)	−0.009 (2)	0.008 (3)
C11	0.033 (3)	0.027 (3)	0.062 (4)	0.004 (2)	−0.004 (3)	0.004 (3)
C12	0.034 (3)	0.021 (2)	0.059 (3)	0.002 (2)	0.010 (3)	0.002 (2)
C37	0.055 (4)	0.049 (3)	0.026 (2)	−0.001 (3)	−0.002 (3)	0.000 (2)

Geometric parameters (Å, º) top

Cu1—O1	1.916 (4)	C33—H33	0.93
Cu1—O2	1.917 (3)	C27—C28	1.410 (7)
Cu1—O3	2.022 (3)	C27—C32	1.437 (6)
Cu1—N1	2.022 (4)	C28—C29	1.386 (7)
Cu2—O4	1.914 (3)	C28—H28	0.93
Cu2—O5	1.918 (3)	C18—C19	1.384 (7)
Cu2—O6	2.019 (3)	C18—H18	0.93
Cu2—N3	2.028 (4)	C6—C5	1.427 (7)
O2—C8	1.315 (6)	C6—C7	1.447 (6)
N3—C26	1.318 (6)	C7—H7	0.93
N3—C34	1.429 (5)	C2—H2	0.93
N1—C7	1.309 (6)	C26—H26	0.93
N1—C15	1.439 (5)	C16—H16	0.93
O4—C20	1.312 (6)	C5—C4	1.390 (7)
O6—C33	1.262 (6)	C5—H5	0.93
C31—C30	1.369 (7)	C14—H14	0.93
C31—C32	1.433 (7)	N4—C38	1.345 (6)
C31—H31	0.93	N4—C34	1.352 (6)
O1—C1	1.315 (6)	C23—C24	1.386 (6)
O3—C14	1.265 (6)	C23—C22	1.410 (7)
C1—C6	1.432 (7)	C23—H23	0.93
C1—C2	1.432 (7)	N2—C19	1.354 (6)
O5—C27	1.318 (6)	C24—H24	0.93
C17—C18	1.388 (8)	C38—C37	1.386 (7)
C17—C16	1.390 (6)	C38—H38	0.93
C17—H17	0.93	C29—H29	0.93
C25—C24	1.417 (7)	C9—C10	1.378 (7)
C25—C26	1.441 (6)	C9—C8	1.429 (6)
C25—C20	1.448 (6)	C9—H9	0.93
C15—N2	1.345 (6)	C10—C11	1.423 (8)
C15—C16	1.394 (7)	C10—H10	0.93
C20—C21	1.434 (6)	C34—C35	1.402 (6)
C30—C29	1.412 (8)	C22—H22	0.93
C30—H30	0.93	C19—H19	0.93
C21—C22	1.390 (7)	C36—C35	1.383 (7)
C21—H21	0.93	C36—C37	1.401 (8)
C13—C12	1.424 (7)	C36—H36	0.93
C13—C14	1.426 (7)	C35—H35	0.93
C13—C8	1.427 (6)	C4—H4	0.93
C3—C2	1.382 (8)	C11—C12	1.379 (7)
C3—C4	1.403 (8)	C11—H11	0.93
C3—H3	0.93	C12—H12	0.93
C33—C32	1.437 (6)	C37—H37	0.93

O1—Cu1—O2	167.40 (15)	N1—C7—H7	117
O1—Cu1—O3	83.95 (14)	C6—C7—H7	117
O2—Cu1—O3	91.05 (14)	C3—C2—C1	121.8 (5)
O1—Cu1—N1	91.50 (16)	C3—C2—H2	119.1
O2—Cu1—N1	92.86 (14)	C1—C2—H2	119.1
O3—Cu1—N1	174.69 (16)	N3—C26—C25	127.5 (4)
O4—Cu2—O5	167.61 (15)	N3—C26—H26	116.3
O4—Cu2—O6	84.55 (13)	C25—C26—H26	116.3
O5—Cu2—O6	90.89 (14)	C17—C16—C15	118.1 (5)
O4—Cu2—N3	91.98 (15)	C17—C16—H16	120.9
O5—Cu2—N3	91.89 (14)	C15—C16—H16	120.9
O6—Cu2—N3	175.40 (15)	C4—C5—C6	121.3 (5)
C8—O2—Cu1	128.3 (3)	C4—C5—H5	119.3
C26—N3—C34	115.3 (4)	C6—C5—H5	119.3
C26—N3—Cu2	121.0 (3)	C31—C32—C33	117.2 (4)
C34—N3—Cu2	123.5 (3)	C31—C32—C27	119.9 (4)
C7—N1—C15	115.0 (4)	C33—C32—C27	122.9 (5)
C7—N1—Cu1	121.5 (3)	O3—C14—C13	127.8 (5)
C15—N1—Cu1	123.2 (3)	O3—C14—H14	116.1
C20—O4—Cu2	125.6 (3)	C13—C14—H14	116.1
C33—O6—Cu2	126.0 (3)	C38—N4—C34	117.4 (4)
C30—C31—C32	121.2 (5)	C24—C23—C22	118.8 (5)
C30—C31—H31	119.4	C24—C23—H23	120.6
C32—C31—H31	119.4	C22—C23—H23	120.6
C1—O1—Cu1	126.4 (3)	C15—N2—C19	117.1 (4)
C14—O3—Cu1	124.9 (3)	C23—C24—C25	121.5 (4)
O1—C1—C6	123.7 (4)	C23—C24—H24	119.3
O1—C1—C2	119.6 (5)	C25—C24—H24	119.3
C6—C1—C2	116.7 (5)	N4—C38—C37	123.4 (5)
C27—O5—Cu2	129.2 (3)	N4—C38—H38	118.3
C18—C17—C16	119.8 (5)	C37—C38—H38	118.3
C18—C17—H17	120.1	C28—C29—C30	121.7 (5)
C16—C17—H17	120.1	C28—C29—H29	119.2
C24—C25—C26	117.4 (4)	C30—C29—H29	119.2
C24—C25—C20	120.6 (4)	C10—C9—C8	121.6 (5)
C26—C25—C20	121.7 (4)	C10—C9—H9	119.2
N2—C15—C16	123.2 (4)	C8—C9—H9	119.2
N2—C15—N1	118.4 (4)	C9—C10—C11	121.8 (5)
C16—C15—N1	118.4 (4)	C9—C10—H10	119.1
O4—C20—C21	119.9 (4)	C11—C10—H10	119.1
O4—C20—C25	124.2 (4)	N4—C34—C35	122.8 (4)
C21—C20—C25	115.8 (4)	N4—C34—N3	118.1 (4)
C31—C30—C29	118.6 (5)	C35—C34—N3	119.0 (4)
C31—C30—H30	120.7	C21—C22—C23	121.2 (5)
C29—C30—H30	120.7	C21—C22—H22	119.4
C22—C21—C20	122.0 (5)	C23—C22—H22	119.4
C22—C21—H21	119	N2—C19—C18	123.8 (5)
C20—C21—H21	119	N2—C19—H19	118.1
C12—C13—C14	118.1 (5)	C18—C19—H19	118.1
C12—C13—C8	120.0 (5)	C35—C36—C37	119.0 (5)
C14—C13—C8	121.9 (5)	C35—C36—H36	120.5
C2—C3—C4	121.4 (5)	C37—C36—H36	120.5
C2—C3—H3	119.3	C36—C35—C34	118.5 (5)
C4—C3—H3	119.3	C36—C35—H35	120.7
O6—C33—C32	126.5 (5)	C34—C35—H35	120.7
O6—C33—H33	116.8	O2—C8—C13	124.4 (4)
C32—C33—H33	116.8	O2—C8—C9	118.9 (4)
O5—C27—C28	119.7 (4)	C13—C8—C9	116.7 (4)
O5—C27—C32	123.1 (4)	C5—C4—C3	118.7 (5)
C28—C27—C32	117.2 (5)	C5—C4—H4	120.7
C29—C28—C27	121.4 (5)	C3—C4—H4	120.7
C29—C28—H28	119.3	C12—C11—C10	117.4 (5)
C27—C28—H28	119.3	C12—C11—H11	121.3
C19—C18—C17	117.9 (4)	C10—C11—H11	121.3
C19—C18—H18	121	C11—C12—C13	122.4 (5)
C17—C18—H18	121	C11—C12—H12	118.8
C5—C6—C1	120.0 (4)	C13—C12—H12	118.8
C5—C6—C7	116.7 (5)	C38—C37—C36	118.5 (5)
C1—C6—C7	122.6 (5)	C38—C37—H37	120.7
N1—C7—C6	125.9 (5)	C36—C37—H37	120.7

Experimental details

Crystal data
Chemical formula	[Cu₂(C₁₂H₉N₂O)₂(C₇H₅O₂)₂]
M_r	763.72
Crystal system, space group	Orthorhombic, P2₁2₁2₁
Temperature (K)	150
a, b, c (Å)	8.9811 (18), 18.856 (4), 19.612 (4)
V (Å³)	3321.2 (12)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	1.34
Crystal size (mm)	0.20 × 0.12 × 0.06

Data collection
Diffractometer	Rigaku Saturn724+ diffractometer
Absorption correction	Multi-scan (ABSCOR; Higashi, 1995)
T_min, T_max	0.736, 1
No. of measured, independent and observed [I > 2σ(I)] reflections	33976, 6782, 6545
R_int	0.076
(sin θ/λ)_max (Å⁻¹)	0.625

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.057, 0.106, 1.20
No. of reflections	6782
No. of parameters	452
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.39, −0.41
Absolute structure	Flack (1983), 2964 Friedel pairs
Absolute structure parameter	0.353 (17)

Computer programs: CrystalClear (Rigaku, 2008), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008), WinGX (Farrugia, 1999).

Footnotes

‡Other affiliation: Department of Chemistry, University of New Brunswick, Fredericton, NB, Canada E3B 5A3.

Acknowledgements

JMC thanks the Royal Society for a University Research Fellowship, the Taiwanese Ministry of Education for a partially funded PhD studentship (for TCL), the University of New Brunswick for the UNB Vice-Chancellor's Research Chair (JMC), and NSERC Discovery Grant 355708 (for PGW).

References

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Flack, H. D. (1983). Acta Cryst. A39, 876–881. CrossRef CAS Web of Science IUCr Journals Google Scholar
Hall, D., McKinnon, A. J. & Waters, T. N. (1965). J. Chem. Soc. p. 425. CrossRef Google Scholar
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