Tetra-kis[μ-2-(meth-oxy-carbon-yl)benzoato-κ(2) O (1):O (1')]bis-[(acetonitrile-κN)copper(II)](Cu-Cu).

In the binuclear copper(II) title complex, [Cu2(C9H7O4)4(C2H3N)2], an inversion centre is situtated at the mid-point of the Cu-Cu bond. The Cu(II) atom together with its four coordinated O atoms are in a distorted planar square arrangement while the nitro-gen and the other Cu(II) atom are located in apical positions. The whole mol-ecule looks like a paddle-wheel. In the crystal, chains are assembled along the b axis through C-H⋯O hydrogen bonds and slipped π-π inter-actions between the benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.6929 (3) Å and slippage = 0.641 (1) Å].

Related literature

For a review on related binuclear CuII carboxyl­ato compounds with subnormal magnetic moments, see: Kato et al. (1964 ▶). For the electrochemical behavior of related compounds, see: Reinhard et al. (2003 ▶). For the synthesis of related compounds, see: Liu et al. (2008 ▶).

Experimental

Crystal data

[Cu2(C9H7O4)4(C2H3N)2]

M = 925.77

Triclinic,

a = 8.2332 (10) Å

b = 10.5730 (13) Å

c = 12.6673 (15) Å

α = 104.774 (1)°

β = 108.061 (2)°

γ = 91.152 (1)°

V = 1007.8 (2) Å3

Z = 1

Mo Kα radiation

μ = 1.13 mm−1

T = 298 K

0.41 × 0.30 × 0.27 mm

Data collection

Bruker SMART CCD area-detector diffractometer

Absorption correction: multi-scan (SADABS; Bruker, 2001 ▶) T min = 0.654, T max = 0.750

5143 measured reflections

3466 independent reflections

2906 reflections with I > 2σ(I)

R int = 0.022

Refinement

R[F 2 > 2σ(F 2)] = 0.037

wR(F 2) = 0.105

S = 1.07

3466 reflections

271 parameters

H-atom parameters constrained

Δρmax = 0.55 e Å−3

Δρmin = −0.32 e Å−3

Data collection: SMART (Bruker, 1999 ▶); cell refinement: SAINT (Bruker, 1999 ▶); 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.

Click here for additional data file.

Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536812049410/lr2089sup1.cif

Click here for additional data file.

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536812049410/lr2089Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

[Cu2(C9H7O4)4(C2H3N)2]	Z = 1
Mr = 925.77	F(000) = 474
Triclinic, P1	Dx = 1.525 Mg m−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 8.2332 (10) Å	Cell parameters from 2861 reflections
b = 10.5730 (13) Å	θ = 2.3–27.6°
c = 12.6673 (15) Å	µ = 1.13 mm−1
α = 104.774 (1)°	T = 298 K
β = 108.061 (2)°	Block, blue
γ = 91.152 (1)°	0.41 × 0.30 × 0.27 mm
V = 1007.8 (2) Å3

Bruker SMART CCD area-detector diffractometer	3466 independent reflections
Radiation source: fine-focus sealed tube	2906 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.022
phi and ω scans	θmax = 25.0°, θmin = 1.8°
Absorption correction: multi-scan (SADABS; Bruker, 2001)	h = −9→9
Tmin = 0.654, Tmax = 0.750	k = −12→12
5143 measured reflections	l = −11→15

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)] = 0.037	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.105	H-atom parameters constrained
S = 1.07	w = 1/[σ2(Fo2) + (0.0576P)2 + 0.2799P] where P = (Fo2 + 2Fc2)/3
3466 reflections	(Δ/σ)max = 0.001
271 parameters	Δρmax = 0.55 e Å−3
0 restraints	Δρmin = −0.32 e Å−3

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	0.66718 (4)	0.48669 (3)	0.52396 (3)	0.02864 (14)
N1	0.9334 (4)	0.4460 (3)	0.5907 (3)	0.0511 (7)
O1	0.5939 (3)	0.33112 (19)	0.56430 (17)	0.0356 (5)
O2	0.3117 (3)	0.3521 (2)	0.52217 (19)	0.0407 (5)
O3	0.6624 (3)	0.3323 (2)	0.8074 (2)	0.0519 (6)
O4	0.8468 (4)	0.1920 (3)	0.7599 (3)	0.0758 (9)
O5	0.6016 (3)	0.3852 (2)	0.36022 (17)	0.0370 (5)
O6	0.3193 (3)	0.4033 (2)	0.32214 (17)	0.0373 (5)
O7	0.1070 (3)	0.1505 (2)	0.2080 (2)	0.0489 (6)
O8	−0.0269 (3)	0.2908 (3)	0.1135 (2)	0.0591 (7)
C1	0.4421 (4)	0.2953 (3)	0.5562 (2)	0.0320 (7)
C2	0.4171 (4)	0.1705 (3)	0.5883 (3)	0.0341 (7)
C3	0.2681 (4)	0.0870 (3)	0.5272 (3)	0.0481 (9)
H3	0.1831	0.1115	0.4703	0.058*
C4	0.2426 (5)	−0.0317 (3)	0.5485 (3)	0.0531 (9)
H4	0.1406	−0.0861	0.5072	0.064*
C5	0.3681 (5)	−0.0695 (3)	0.6311 (3)	0.0497 (9)
H5	0.3519	−0.1502	0.6451	0.060*
C6	0.5178 (5)	0.0117 (3)	0.6930 (3)	0.0475 (8)
H6	0.6026	−0.0142	0.7490	0.057*
C7	0.5432 (4)	0.1324 (3)	0.6725 (3)	0.0366 (7)
C8	0.7035 (5)	0.2203 (4)	0.7487 (3)	0.0466 (8)
C9	0.8041 (6)	0.4269 (4)	0.8868 (3)	0.0730 (13)
H9A	0.8914	0.3821	0.9281	0.109*
H9B	0.7641	0.4889	0.9405	0.109*
H9C	0.8510	0.4726	0.8446	0.109*
C10	0.4473 (4)	0.3629 (3)	0.2946 (2)	0.0314 (7)
C11	0.4130 (4)	0.2844 (3)	0.1715 (2)	0.0340 (7)
C12	0.5451 (4)	0.2722 (3)	0.1247 (3)	0.0458 (8)
H12	0.6562	0.3065	0.1721	0.055*
C13	0.5161 (5)	0.2104 (4)	0.0094 (3)	0.0612 (10)
H13	0.6066	0.2032	−0.0202	0.073*
C14	0.3510 (5)	0.1593 (4)	−0.0613 (3)	0.0667 (11)
H14	0.3299	0.1182	−0.1392	0.080*
C15	0.2173 (5)	0.1693 (4)	−0.0162 (3)	0.0549 (10)
H15	0.1066	0.1344	−0.0643	0.066*
C16	0.2458 (4)	0.2306 (3)	0.0994 (3)	0.0380 (7)
C17	0.0956 (4)	0.2320 (3)	0.1417 (3)	0.0413 (8)
C18	−0.0319 (5)	0.1442 (4)	0.2536 (3)	0.0629 (11)
H18A	−0.0247	0.2246	0.3119	0.094*
H18B	−0.0240	0.0716	0.2869	0.094*
H18C	−0.1396	0.1323	0.1925	0.094*
C19	1.0408 (4)	0.4208 (4)	0.6578 (3)	0.0467 (8)
C20	1.1799 (5)	0.3891 (5)	0.7485 (4)	0.0714 (12)
H20A	1.1928	0.4511	0.8214	0.107*
H20B	1.2852	0.3933	0.7313	0.107*
H20C	1.1531	0.3019	0.7524	0.107*

	U11	U22	U33	U12	U13	U23
Cu1	0.0319 (2)	0.0312 (2)	0.0265 (2)	0.00672 (14)	0.01079 (15)	0.01251 (15)
N1	0.0412 (16)	0.062 (2)	0.0581 (19)	0.0198 (14)	0.0169 (14)	0.0284 (16)
O1	0.0416 (12)	0.0331 (11)	0.0384 (12)	0.0063 (9)	0.0153 (9)	0.0181 (9)
O2	0.0420 (12)	0.0384 (12)	0.0496 (13)	0.0073 (10)	0.0158 (10)	0.0245 (10)
O3	0.0625 (15)	0.0520 (15)	0.0372 (13)	0.0001 (12)	0.0093 (11)	0.0144 (11)
O4	0.0478 (16)	0.082 (2)	0.093 (2)	0.0159 (15)	0.0066 (15)	0.0341 (18)
O5	0.0397 (12)	0.0452 (13)	0.0268 (11)	0.0078 (10)	0.0105 (9)	0.0111 (9)
O6	0.0379 (12)	0.0428 (13)	0.0302 (11)	0.0077 (10)	0.0123 (9)	0.0067 (9)
O7	0.0455 (13)	0.0544 (15)	0.0515 (14)	0.0058 (11)	0.0150 (11)	0.0236 (12)
O8	0.0462 (14)	0.0785 (19)	0.0617 (17)	0.0205 (13)	0.0176 (12)	0.0339 (14)
C1	0.0418 (18)	0.0336 (16)	0.0242 (14)	0.0047 (14)	0.0140 (13)	0.0099 (12)
C2	0.0412 (17)	0.0319 (16)	0.0350 (16)	0.0061 (13)	0.0179 (13)	0.0123 (13)
C3	0.050 (2)	0.045 (2)	0.048 (2)	−0.0028 (16)	0.0097 (16)	0.0195 (16)
C4	0.059 (2)	0.042 (2)	0.061 (2)	−0.0027 (17)	0.0232 (18)	0.0148 (17)
C5	0.071 (2)	0.0314 (18)	0.065 (2)	0.0131 (17)	0.041 (2)	0.0215 (17)
C6	0.061 (2)	0.045 (2)	0.054 (2)	0.0211 (17)	0.0298 (18)	0.0284 (17)
C7	0.0462 (18)	0.0360 (17)	0.0393 (17)	0.0120 (14)	0.0237 (14)	0.0176 (14)
C8	0.049 (2)	0.051 (2)	0.048 (2)	0.0102 (17)	0.0129 (16)	0.0299 (17)
C9	0.084 (3)	0.063 (3)	0.051 (2)	−0.009 (2)	−0.011 (2)	0.020 (2)
C10	0.0415 (17)	0.0281 (15)	0.0292 (15)	0.0069 (13)	0.0129 (14)	0.0142 (12)
C11	0.0412 (17)	0.0329 (16)	0.0287 (15)	0.0074 (13)	0.0118 (13)	0.0089 (12)
C12	0.0457 (19)	0.055 (2)	0.0348 (18)	0.0047 (16)	0.0144 (15)	0.0086 (15)
C13	0.063 (2)	0.081 (3)	0.042 (2)	0.010 (2)	0.0296 (19)	0.0068 (19)
C14	0.072 (3)	0.086 (3)	0.0330 (19)	0.011 (2)	0.0174 (19)	−0.0013 (19)
C15	0.051 (2)	0.065 (2)	0.0349 (19)	0.0045 (18)	0.0053 (16)	0.0020 (17)
C16	0.0424 (17)	0.0359 (17)	0.0335 (17)	0.0065 (14)	0.0110 (14)	0.0076 (13)
C17	0.0405 (18)	0.0426 (19)	0.0361 (17)	0.0053 (15)	0.0070 (14)	0.0094 (14)
C18	0.054 (2)	0.081 (3)	0.061 (3)	−0.002 (2)	0.0207 (19)	0.030 (2)
C19	0.0412 (19)	0.057 (2)	0.053 (2)	0.0121 (16)	0.0240 (17)	0.0224 (18)
C20	0.059 (2)	0.107 (4)	0.061 (3)	0.027 (2)	0.018 (2)	0.045 (2)

Cu1—O2i	1.959 (2)	C5—H5	0.9300
Cu1—O6i	1.967 (2)	C6—C7	1.390 (4)
Cu1—O5	1.973 (2)	C6—H6	0.9300
Cu1—O1	1.9775 (19)	C7—C8	1.497 (5)
Cu1—N1	2.186 (3)	C9—H9A	0.9600
Cu1—Cu1i	2.6662 (7)	C9—H9B	0.9600
N1—C19	1.111 (4)	C9—H9C	0.9600
O1—C1	1.264 (4)	C10—C11	1.503 (4)
O2—C1	1.253 (4)	C11—C12	1.385 (5)
O2—Cu1i	1.9590 (19)	C11—C16	1.405 (4)
O3—C8	1.338 (4)	C12—C13	1.380 (5)
O3—C9	1.445 (4)	C12—H12	0.9300
O4—C8	1.197 (4)	C13—C14	1.382 (6)
O5—C10	1.263 (3)	C13—H13	0.9300
O6—C10	1.259 (4)	C14—C15	1.383 (5)
O6—Cu1i	1.967 (2)	C14—H14	0.9300
O7—C17	1.335 (4)	C15—C16	1.385 (4)
O7—C18	1.439 (4)	C15—H15	0.9300
O8—C17	1.202 (4)	C16—C17	1.492 (5)
C1—C2	1.505 (4)	C18—H18A	0.9600
C2—C3	1.380 (4)	C18—H18B	0.9600
C2—C7	1.388 (4)	C18—H18C	0.9600
C3—C4	1.375 (5)	C19—C20	1.464 (5)
C3—H3	0.9300	C20—H20A	0.9600
C4—C5	1.371 (5)	C20—H20B	0.9600
C4—H4	0.9300	C20—H20C	0.9600
C5—C6	1.373 (5)
O2i—Cu1—O6i	88.57 (9)	O3—C8—C7	109.7 (3)
O2i—Cu1—O5	89.00 (9)	O3—C9—H9A	109.5
O6i—Cu1—O5	167.59 (8)	O3—C9—H9B	109.5
O2i—Cu1—O1	167.74 (9)	H9A—C9—H9B	109.5
O6i—Cu1—O1	89.31 (9)	O3—C9—H9C	109.5
O5—Cu1—O1	90.49 (9)	H9A—C9—H9C	109.5
O2i—Cu1—N1	103.49 (10)	H9B—C9—H9C	109.5
O6i—Cu1—N1	90.66 (10)	O6—C10—O5	125.9 (3)
O5—Cu1—N1	101.74 (10)	O6—C10—C11	116.7 (2)
O1—Cu1—N1	88.60 (10)	O5—C10—C11	117.3 (3)
O2i—Cu1—Cu1i	86.83 (6)	C12—C11—C16	118.7 (3)
O6i—Cu1—Cu1i	83.15 (6)	C12—C11—C10	120.0 (3)
O5—Cu1—Cu1i	84.57 (6)	C16—C11—C10	121.2 (3)
O1—Cu1—Cu1i	80.93 (6)	C13—C12—C11	121.7 (3)
N1—Cu1—Cu1i	167.87 (8)	C13—C12—H12	119.1
C19—N1—Cu1	151.4 (3)	C11—C12—H12	119.1
C1—O1—Cu1	125.83 (19)	C12—C13—C14	119.3 (4)
C1—O2—Cu1i	120.03 (19)	C12—C13—H13	120.3
C8—O3—C9	116.4 (3)	C14—C13—H13	120.3
C10—O5—Cu1	122.1 (2)	C13—C14—C15	120.0 (3)
C10—O6—Cu1i	124.20 (19)	C13—C14—H14	120.0
C17—O7—C18	115.9 (3)	C15—C14—H14	120.0
O2—C1—O1	126.4 (3)	C14—C15—C16	120.9 (3)
O2—C1—C2	117.5 (3)	C14—C15—H15	119.5
O1—C1—C2	116.1 (3)	C16—C15—H15	119.5
C3—C2—C7	118.7 (3)	C15—C16—C11	119.4 (3)
C3—C2—C1	118.9 (3)	C15—C16—C17	117.3 (3)
C7—C2—C1	122.3 (3)	C11—C16—C17	123.3 (3)
C4—C3—C2	121.3 (3)	O8—C17—O7	123.6 (3)
C4—C3—H3	119.3	O8—C17—C16	124.9 (3)
C2—C3—H3	119.3	O7—C17—C16	111.3 (3)
C5—C4—C3	119.7 (3)	O7—C18—H18A	109.5
C5—C4—H4	120.1	O7—C18—H18B	109.5
C3—C4—H4	120.1	H18A—C18—H18B	109.5
C4—C5—C6	120.1 (3)	O7—C18—H18C	109.5
C4—C5—H5	120.0	H18A—C18—H18C	109.5
C6—C5—H5	120.0	H18B—C18—H18C	109.5
C5—C6—C7	120.3 (3)	N1—C19—C20	178.4 (4)
C5—C6—H6	119.8	C19—C20—H20A	109.5
C7—C6—H6	119.8	C19—C20—H20B	109.5
C2—C7—C6	119.8 (3)	H20A—C20—H20B	109.5
C2—C7—C8	122.5 (3)	C19—C20—H20C	109.5
C6—C7—C8	117.6 (3)	H20A—C20—H20C	109.5
O4—C8—O3	125.1 (4)	H20B—C20—H20C	109.5
O4—C8—C7	125.1 (4)
O2i—Cu1—N1—C19	131.8 (6)	C5—C6—C7—C8	175.7 (3)
O6i—Cu1—N1—C19	43.1 (7)	C9—O3—C8—O4	2.5 (5)
O5—Cu1—N1—C19	−136.4 (7)	C9—O3—C8—C7	178.8 (3)
O1—Cu1—N1—C19	−46.2 (7)	C2—C7—C8—O4	−125.1 (4)
Cu1i—Cu1—N1—C19	−15.9 (10)	C6—C7—C8—O4	58.7 (5)
O2i—Cu1—O1—C1	4.0 (5)	C2—C7—C8—O3	58.5 (4)
O6i—Cu1—O1—C1	84.0 (2)	C6—C7—C8—O3	−117.7 (3)
O5—Cu1—O1—C1	−83.6 (2)	Cu1i—O6—C10—O5	0.6 (4)
N1—Cu1—O1—C1	174.7 (2)	Cu1i—O6—C10—C11	−177.57 (17)
Cu1i—Cu1—O1—C1	0.8 (2)	Cu1—O5—C10—O6	1.9 (4)
O2i—Cu1—O5—C10	−89.3 (2)	Cu1—O5—C10—C11	−179.96 (17)
O6i—Cu1—O5—C10	−10.6 (5)	O6—C10—C11—C12	159.6 (3)
O1—Cu1—O5—C10	78.5 (2)	O5—C10—C11—C12	−18.8 (4)
N1—Cu1—O5—C10	167.1 (2)	O6—C10—C11—C16	−15.6 (4)
Cu1i—Cu1—O5—C10	−2.4 (2)	O5—C10—C11—C16	166.0 (3)
Cu1i—O2—C1—O1	−0.4 (4)	C16—C11—C12—C13	0.8 (5)
Cu1i—O2—C1—C2	−178.87 (18)	C10—C11—C12—C13	−174.5 (3)
Cu1—O1—C1—O2	−0.5 (4)	C11—C12—C13—C14	0.0 (6)
Cu1—O1—C1—C2	177.95 (18)	C12—C13—C14—C15	−0.6 (7)
O2—C1—C2—C3	34.7 (4)	C13—C14—C15—C16	0.3 (6)
O1—C1—C2—C3	−143.9 (3)	C14—C15—C16—C11	0.6 (5)
O2—C1—C2—C7	−149.3 (3)	C14—C15—C16—C17	−177.5 (4)
O1—C1—C2—C7	32.1 (4)	C12—C11—C16—C15	−1.1 (5)
C7—C2—C3—C4	0.3 (5)	C10—C11—C16—C15	174.1 (3)
C1—C2—C3—C4	176.4 (3)	C12—C11—C16—C17	176.8 (3)
C2—C3—C4—C5	−0.9 (6)	C10—C11—C16—C17	−7.9 (4)
C3—C4—C5—C6	0.8 (6)	C18—O7—C17—O8	−5.2 (5)
C4—C5—C6—C7	−0.1 (5)	C18—O7—C17—C16	180.0 (3)
C3—C2—C7—C6	0.4 (5)	C15—C16—C17—O8	−66.9 (5)
C1—C2—C7—C6	−175.5 (3)	C11—C16—C17—O8	115.1 (4)
C3—C2—C7—C8	−175.7 (3)	C15—C16—C17—O7	107.8 (3)
C1—C2—C7—C8	8.4 (5)	C11—C16—C17—O7	−70.2 (4)
C5—C6—C7—C2	−0.5 (5)	Cu1—N1—C19—C20	−23 (16)

D—H···A	D—H	H···A	D···A	D—H···A
C5—H5···O5ii	0.93	2.51	3.379 (4)	156

Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C5—H5⋯O5i	0.93	2.51	3.379 (4)	156

Symmetry code: (i) .