Crystal structure of bis-[μ-meth-oxy(pyridin-2-yl)methano-lato-κ(3) N,O:O]bis[chlorido-copper(II)].

The racemic title compound, [Cu2(C7H8NO2)2Cl2], is composed of dinuclear mol-ecules in which meth-oxy(pyridin-2-yl)methano-late ligands bridge two symmetry-related Cu(II) ions. Each Cu(II) ion is coordinated in a square-planar geometry by one Cl atom, the N and O atoms of the bidentate ligand and the bridging O atom of the centrosymmetrically related bidentate ligand. The separation between the two Cu(II) atoms is 3.005 (1) Å. In the crystal, non-classical C-H⋯O hydrogen bonds, weak π-π stacking [centroid-centroid distance = 4.073 (1) Å] and weak electrostatic Cu⋯Cl inter-actions [3.023 (1) Å] link the dinuclear mol-ecules into chains running parallel to the b axis. These chains are further connected by weak C-H⋯Cl hydrogen bonds directed approximately along the a axis, forming a three-dimensional supra-molecular network.

Related literature

For related structures and applications of transition metal compounds with the meth­oxy-2-pyridyl­methano­late ligand, see: Pijper et al. (2010 ▸); Mondal et al. (2009 ▸); Drew et al. (2008 ▸); Wang et al. (2003 ▸); Guidote et al. (2001 ▸).

Experimental

Crystal data

[Cu2(C7H8NO2)2Cl2]

M = 474.29

Monoclinic,

a = 10.5568 (14) Å

b = 4.0728 (6) Å

c = 19.257 (3) Å

β = 95.280 (3)°

V = 824.5 (2) Å3

Z = 2

Mo Kα radiation

μ = 2.92 mm−1

T = 298 K

0.16 × 0.10 × 0.06 mm

Data collection

Bruker D8 QUEST CMOS diffractometer

Absorption correction: multi-scan (SADABS; Bruker, 2014 ▸) T min = 0.645, T max = 0.745

7703 measured reflections

1485 independent reflections

1030 reflections with I > 2σ(I)

R int = 0.091

Refinement

R[F 2 > 2σ(F 2)] = 0.045

wR(F 2) = 0.108

S = 1.04

1485 reflections

110 parameters

H-atom parameters constrained

Δρmax = 0.52 e Å−3

Δρmin = −0.42 e Å−3

Data collection: APEX2 (Bruker, 2014 ▸); cell refinement: SAINT (Bruker, 2014 ▸); data reduction: SAINT; program(s) used to solve structure: SHELXT (Sheldrick, 2015a ▸); program(s) used to refine structure: SHELXL97 (Sheldrick, 2015b ▸); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012 ▸) and DIAMOND (Brandenburg, 2006 ▸); software used to prepare material for publication: publCIF (Westrip, 2010 ▸), enCIFer (Allen et al., 2004 ▸) and OLEX2 (Dolomanov et al., 2009 ▸).

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S2056989015001310/cq2013sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989015001310/cq2013Isup2.hkl

Click here for additional data file.

Supporting information file. DOI: 10.1107/S2056989015001310/cq2013Isup3.cdx

Click here for additional data file.

. DOI: 10.1107/S2056989015001310/cq2013fig1.tif

A view of the dinuclear mol­ecule of the title compound, showing the atom labelling. Displacement ellipsoids are drawn at the 50% probability level.

Click here for additional data file.

b . DOI: 10.1107/S2056989015001310/cq2013fig2.tif

Partial packing diagram of the title compound showing a mol­ecular one-dimensional chain running parallel to the b axis assembled from dinuclear mol­ecules linked together through non-classical C—H⋯O hydrogen bonds, weak π-π stacking and weak electrostatic Cu⋯Cl inter­actions (dashed lines). Hydrogen atoms not involved in the hydrogen bonding inter­actions are omitted for clarity.

Click here for additional data file.

. DOI: 10.1107/S2056989015001310/cq2013fig3.tif

A view of the weak C—H⋯Cl hydrogen bonding network between adjacent dinuclear mol­ecules in the title compound which serve to connect the chains into a three-dimensional architecture.

CCDC reference: 1044740

Additional supporting information: crystallographic information; 3D view; checkCIF report

[Cu2(C7H8NO2)2Cl2]	F(000) = 476
Mr = 474.29	Dx = 1.910 Mg m−3
Monoclinic, P21/n	Mo Kα radiation, λ = 0.71073 Å
a = 10.5568 (14) Å	Cell parameters from 546 reflections
b = 4.0728 (6) Å	θ = 3.6–25.4°
c = 19.257 (3) Å	µ = 2.92 mm−1
β = 95.280 (3)°	T = 298 K
V = 824.5 (2) Å3	Plate, pale-green
Z = 2	0.16 × 0.10 × 0.06 mm

Bruker D8 QUEST CMOS diffractometer	1485 independent reflections
Radiation source: fine-focus sealed tube	1030 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.091
Detector resolution: 0 pixels mm-1	θmax = 25.4°, θmin = 3.6°
φ and ω scans	h = −12→12
Absorption correction: multi-scan (SADABS; Bruker, 2014)	k = −4→4
Tmin = 0.645, Tmax = 0.745	l = −23→23
7703 measured reflections

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)] = 0.045	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.108	H-atom parameters constrained
S = 1.04	w = 1/[σ2(Fo2) + (0.0544P)2 + 0.5475P] where P = (Fo2 + 2Fc2)/3
1485 reflections	(Δ/σ)max = 0.001
110 parameters	Δρmax = 0.52 e Å−3
0 restraints	Δρmin = −0.42 e Å−3
0 constraints

Experimental. SADABS-2014/4 (Bruker,2014/4) was used for absorption correction. wR2(int) was 0.0681 before and 0.0535 after correction. The Ratio of minimum to maximum transmission is 0.8650. The λ/2 correction factor is 0.00150.

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	0.36725 (5)	0.3633 (2)	0.49239 (3)	0.0376 (3)
Cl1	0.25368 (12)	−0.0100 (4)	0.42980 (7)	0.0431 (4)
O1	0.4853 (3)	0.5904 (12)	0.55882 (18)	0.0542 (13)
O2	0.4934 (3)	0.5112 (11)	0.6792 (2)	0.0491 (11)
N1	0.2501 (3)	0.4522 (11)	0.5649 (2)	0.0301 (11)
C1	0.1248 (4)	0.3804 (15)	0.5620 (3)	0.0371 (14)
H1	0.0886	0.2558	0.5248	0.044*
C2	0.0492 (5)	0.4839 (17)	0.6114 (3)	0.0486 (17)
H2	−0.0368	0.4299	0.6080	0.058*
C3	0.1015 (5)	0.6680 (17)	0.6662 (3)	0.0470 (16)
H3	0.0515	0.7428	0.7003	0.056*
C4	0.2300 (5)	0.7412 (15)	0.6700 (3)	0.0399 (14)
H4	0.2677	0.8658	0.7067	0.048*
C5	0.3014 (4)	0.6271 (14)	0.6186 (2)	0.0304 (12)
C6	0.4438 (4)	0.6921 (15)	0.6201 (3)	0.0336 (13)
H6	0.4613	0.9267	0.6272	0.040*
C7	0.6176 (5)	0.6071 (19)	0.7070 (3)	0.0587 (19)
H7A	0.6792	0.5237	0.6779	0.088*
H7B	0.6344	0.5200	0.7532	0.088*
H7C	0.6227	0.8424	0.7086	0.088*

	U11	U22	U33	U12	U13	U23
Cu1	0.0240 (3)	0.0552 (5)	0.0340 (4)	−0.0123 (3)	0.0041 (2)	−0.0096 (4)
Cl1	0.0392 (7)	0.0395 (9)	0.0504 (9)	−0.0114 (7)	0.0034 (6)	−0.0065 (7)
O1	0.0265 (18)	0.099 (4)	0.038 (2)	−0.020 (2)	0.0092 (16)	−0.025 (2)
O2	0.037 (2)	0.051 (3)	0.057 (3)	−0.0029 (19)	−0.0100 (18)	0.010 (2)
N1	0.026 (2)	0.032 (3)	0.032 (2)	−0.0024 (19)	0.0013 (18)	0.006 (2)
C1	0.025 (2)	0.044 (4)	0.041 (3)	−0.002 (3)	0.000 (2)	0.007 (3)
C2	0.024 (3)	0.060 (4)	0.063 (4)	−0.003 (3)	0.013 (3)	0.014 (4)
C3	0.042 (3)	0.050 (4)	0.052 (4)	0.013 (3)	0.020 (3)	0.008 (4)
C4	0.045 (3)	0.033 (4)	0.043 (3)	0.003 (3)	0.010 (3)	−0.001 (3)
C5	0.030 (2)	0.028 (3)	0.033 (3)	0.000 (2)	0.001 (2)	0.011 (3)
C6	0.028 (2)	0.038 (4)	0.034 (3)	−0.002 (2)	0.000 (2)	0.002 (3)
C7	0.042 (3)	0.073 (5)	0.058 (4)	−0.011 (3)	−0.009 (3)	0.013 (4)

Cu1—Cu1i	3.0051 (12)	C1—C2	1.365 (7)
Cu1—Cl1	2.2215 (15)	C2—H2	0.9300
Cu1—O1i	1.927 (3)	C2—C3	1.368 (8)
Cu1—O1	1.937 (4)	C3—H3	0.9300
Cu1—N1	1.982 (4)	C3—C4	1.385 (7)
O1—Cu1i	1.927 (3)	C4—H4	0.9300
O1—C6	1.361 (6)	C4—C5	1.378 (7)
O2—C6	1.415 (6)	C5—C6	1.524 (6)
O2—C7	1.424 (6)	C6—H6	0.9800
N1—C1	1.351 (6)	C7—H7A	0.9600
N1—C5	1.330 (6)	C7—H7B	0.9600
C1—H1	0.9300	C7—H7C	0.9600
Cl1—Cu1—Cu1i	139.33 (5)	C3—C2—H2	120.4
O1—Cu1—Cu1i	38.82 (10)	C2—C3—H3	120.6
O1i—Cu1—Cu1i	39.07 (11)	C2—C3—C4	118.8 (5)
O1i—Cu1—Cl1	102.14 (12)	C4—C3—H3	120.6
O1—Cu1—Cl1	165.33 (16)	C3—C4—H4	120.4
O1i—Cu1—O1	77.89 (16)	C5—C4—C3	119.2 (5)
O1—Cu1—N1	81.54 (15)	C5—C4—H4	120.4
O1i—Cu1—N1	158.20 (18)	N1—C5—C4	121.9 (5)
N1—Cu1—Cu1i	120.03 (12)	N1—C5—C6	116.0 (4)
N1—Cu1—Cl1	99.59 (13)	C4—C5—C6	122.1 (5)
Cu1i—O1—Cu1	102.11 (16)	O1—C6—O2	114.5 (5)
C6—O1—Cu1	118.6 (3)	O1—C6—C5	109.0 (4)
C6—O1—Cu1i	138.9 (3)	O1—C6—H6	110.2
C6—O2—C7	114.8 (4)	O2—C6—C5	102.5 (4)
C1—N1—Cu1	127.1 (4)	O2—C6—H6	110.2
C5—N1—Cu1	114.2 (3)	C5—C6—H6	110.2
C5—N1—C1	118.4 (4)	O2—C7—H7A	109.5
N1—C1—H1	118.7	O2—C7—H7B	109.5
N1—C1—C2	122.5 (5)	O2—C7—H7C	109.5
C2—C1—H1	118.7	H7A—C7—H7B	109.5
C1—C2—H2	120.4	H7A—C7—H7C	109.5
C1—C2—C3	119.1 (5)	H7B—C7—H7C	109.5
Cu1—O1—C6—O2	108.4 (4)	C1—N1—C5—C6	178.4 (5)
Cu1i—O1—C6—O2	−79.8 (7)	C1—C2—C3—C4	−0.6 (9)
Cu1—O1—C6—C5	−5.7 (6)	C2—C3—C4—C5	0.0 (9)
Cu1i—O1—C6—C5	166.1 (4)	C3—C4—C5—N1	1.0 (8)
Cu1—N1—C1—C2	−172.6 (4)	C3—C4—C5—C6	−178.8 (5)
Cu1—N1—C5—C4	172.9 (4)	C4—C5—C6—O1	−171.8 (5)
Cu1—N1—C5—C6	−7.4 (6)	C4—C5—C6—O2	66.5 (7)
N1—C1—C2—C3	0.2 (9)	C5—N1—C1—C2	0.8 (8)
N1—C5—C6—O1	8.4 (7)	C7—O2—C6—O1	81.5 (6)
N1—C5—C6—O2	−113.2 (5)	C7—O2—C6—C5	−160.6 (5)
C1—N1—C5—C4	−1.4 (8)

D—H···A	D—H	H···A	D···A	D—H···A
C2—H2···Cl1ii	0.93	2.90	3.756 (6)	154
C3—H3···O2iii	0.93	2.65	3.517 (7)	156
C6—H6···O2iv	0.98	2.59	3.548 (8)	165

Table 1

Hydrogen-bond geometry (, )

DHA	DH	HA	D A	DHA
C2H2Cl1i	0.93	2.90	3.756(6)	154
C3H3O2ii	0.93	2.65	3.517(7)	156
C6H6O2iii	0.98	2.59	3.548(8)	165

Symmetry codes: (i) ; (ii) ; (iii) .