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ISSN: 2056-9890

Crystal structure of catena-poly[[[aqua­bis­­(1H-imidazole-κN3)copper(II)]-μ-3-({4-[(2-carboxyl­atoeth­yl)carbamo­yl]phen­yl}formamido)­propano­ato-κ2O:O′] dihydrate]

aCollege of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu 241000, People's Republic of China
*Correspondence e-mail: zht2006@mail.ahnu.edu.cn

Edited by D.-J. Xu, Zhejiang University (Yuquan Campus), China (Received 23 March 2015; accepted 27 March 2015; online 11 April 2015)

In the title polymeric complex, {[Cu(C14H14N2O6)(C3H4N2)2(H2O)]·2H2O}n, the CuII cation, located on a twofold rotation axis, is coordinated by one water mol­ecule and two imidazole mol­ecules as well as two symmetry-related 3-([4-[(2-carboxyl­atoeth­yl)carbamo­yl]phen­yl]formamido)­propano­ate dianions (L2−) in an approximately square-pyramidal geometry. The coordinating water mol­ecule is located on a twofold rotation axis while the L2− anion sits about an inversion center. The L2− anions bridge the CuII cations, forming polymeric chains propagating along the [101] direction. In the crystal, O—H⋯O, N—H⋯O hydrogen bonds and weak C—H⋯π inter­action link the polymeric chains and the solvent water mol­ecules into a three-dimensional supra­molecular architecture.

1. Related literature

For related coordination polymers, see: Morrison et al. (2011[Morrison, C. N., Powell, A. K. & Kostakis, G. E. (2011). Cryst. Growth Des. 11, 3653-3662.]); Wang et al. (2012[Wang, C., Zhang, T. & Lin, W. (2012). Chem. Rev. 112, 1084-1104.]); Zhang & Xiong (2012[Zhang, W. & Xiong, R.-G. (2012). Chem. Rev. 112, 1163-1195.]). For the synthesis, see: Yuan et al. (2002[Yuan, Y., Xiao, R., Gao, G., Su, X.-Y., Yu, H., You, J. & Xie, R.-G. (2002). J. Chem. Res. (S), pp. 267-269.]).

[Scheme 1]

2. Experimental

2.1. Crystal data

  • [Cu(C14H14N2O6)(C3H4N2)2(H2O)]·2H2O

  • Mr = 560.02

  • Monoclinic, C 2/c

  • a = 27.752 (5) Å

  • b = 5.5793 (9) Å

  • c = 17.302 (3) Å

  • β = 115.855 (2)°

  • V = 2410.8 (7) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.97 mm−1

  • T = 298 K

  • 0.08 × 0.07 × 0.05 mm

2.2. Data collection

  • Bruker SMART APEXII CCD area-detector diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 2004[Bruker (2004). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]) Tmin = 0.927, Tmax = 0.958

  • 9928 measured reflections

  • 2775 independent reflections

  • 1632 reflections with I > 2σ(I)

  • Rint = 0.081

2.3. Refinement

  • R[F2 > 2σ(F2)] = 0.053

  • wR(F2) = 0.139

  • S = 0.99

  • 2775 reflections

  • 165 parameters

  • H-atom parameters constrained

  • Δρmax = 0.58 e Å−3

  • Δρmin = −0.36 e Å−3

Table 1
Selected bond lengths (Å)

Cu1—N2 1.965 (3)
Cu1—O1 1.976 (3)
Cu1—O4 2.232 (4)

Table 2
Hydrogen-bond geometry (Å, °)

Cg1 is the centroid of the N2/N3/C8–C10 imidazole ring.

D—H⋯A D—H H⋯A DA D—H⋯A
N1—H1⋯O2i 0.86 2.17 2.965 (5) 153
N3—H3⋯O5 0.86 1.90 2.751 (5) 172
O4—H4⋯O2ii 0.82 1.89 2.695 (4) 167
O5—H5A⋯O3iii 0.85 1.91 2.731 (4) 163
O5—H5B⋯O3iv 0.85 2.04 2.810 (4) 149
C3—H3BCg1v 0.93 2.75 3.692 (5) 164
Symmetry codes: (i) x, y+1, z; (ii) [-x+1, y+1, -z+{\script{3\over 2}}]; (iii) [x, -y, z+{\script{1\over 2}}]; (iv) [-x+{\script{1\over 2}}, -y+{\script{1\over 2}}, -z+1]; (v) [-x+{\script{1\over 2}}, y+{\script{3\over 2}}, -z-{\script{1\over 2}}].

Data collection: APEX2 (Bruker, 2004[Bruker (2004). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2004[Bruker (2004). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXTL; molecular graphics: DIAMOND (Brandenburg, 2008[Brandenburg, K. (2008). DIAMOND. Crystal Impact GbR, Bonn, Germany.]); software used to prepare material for publication: SHELXTL.

Supporting information


Comment top

The self-assembly of coordination polymers have been one of the popular areas of in chemistry recently, owing to their intriguing structures and various physical properties, such as optical, electronic, magnetic and catalytic properties (Zhang et al. 2012, Wang et al. 2012). From the view point of the intermolecular interactions, the structures of the coordination polymers are mainly governed by the intra- and intermolecular interactions, such as the coordination interaction, hydrogen bonding interaction and π···π stacking as well as the molecular conformations depending on the molecular flexibility (Morrison et al. 2011). Accordingly, the aromatic pseudopeptidic molecules bearing the carboxylate groups could be the ideal building blocks to construct the coordination polymers with the metal ions. The σ-rotation about the N—C and the C—C bonds could induce flexibility in the molecules. The imine group N—H could serve as a better hydrogen-bonding donor and the amide C=O could also act as a better hydrogen-bonding acceptor. Moreover, the aromatic rings in the molecules could contribute to π···π stacking. The carboxlate groups in the molecules could capture the metal ions through the coordination interaction. Therefore, we have designed and synthesized an aromatic pseudopeptidic ligand, 3,3'-[1,4-bis(- benzamido)]dipropanoic acid (H2L). Here, we report the structure of the title helical chain-like coordination polymer, (I), which is derived from aromatic pseudopeptidic ligand, L2-, and imidazole, namely {[CuL(im)2(H2O)]2(H2O)}n (im = imidazole), (I).

X-ray crystallographic analysis revealed that (I) crystallizes in the monoclinic space group C2/c with an asymmetric unit consisting of a divalent CuII cation and a coordinated water molecule residing on a twofold axis, half of an L2- siting across a center of inversion and one imidazole as well as a lattice water molecule. As shown in Fig 1, the five-coordinate CuII cation has an approximately square-pyramidal coordination environment,in which the equatorial plane is composed of two N atoms (N2 and N2i, symmetry code:(i) 1 - x, y, -z + 3/2) from two imidazole molecules and two O atoms (O1 and O1i,symmetry code:(i) 1 - x, y, -z + 3/2) from two symmetry related L2- dianions, while the water O atom (O4) occupies the apical position (Table 1). The apical Cu1—O4 distance is longer than the others,including the Cu—O1 and the Cu—N2 disatnces. The angles O1—Cu1—O1i and N2—Cu—N2i (symmetry code:(i) 1 - x, y, -z + 3/2) are of 177.05 (18) ° and 173.3 (2) °, respectively. It indicates that these five atoms are approximately located in an equatorial plane. The angles O4—Cu1—O1 and O4—Cu1—N2 are of 91.47 (9)° and 93.36 (10)°, which confirm an approximately square-pyramidal coordination geometry. The carboxylate group O1/C1/O2 coordinates to CuII cation in monodentate fashion via the atom O1. As a result, the ligand dianions connect the copper cations to construct an helical chain which runs along the [101] direction. In the formation of the single-strand helical structure, the peptide segment could play an important role. The torsion angle C1/C2/C3/N1 is of 59.8 (5)°, which is very close to 60 °. It shows the gauche conformation of the peptide segment. It also makes the ligand molecule twist twice and finally construct a single-strand helix through connecting the copper cations. It implies that the conformation of the ligand could be crucial in the formation of the helix. In the lattice, there are two types of helix, viz. right-handed and left-handed. Helices of the same type arrange in parallel along the b axis. The inter-chain hydrogen bonding interactions could contribute to the arrangement of the same type helices. The hydrogen bonding interactions between the lattice water molecules and the helices could contribute to the arrangement of the different type helices. However, the shortest center-center distance between two adjacent phenyl rings is beyond 5 Å. It indicates the absence of π···π staking in the crystal. Therefore, the helical chains are stabilized in the lattice mainly by the hydrogen bonding interactions and van der Waals interactions.

Related literature top

For related coordination polymers, see: Morrison et al. (2011); Wang et al. (2012); Zhang & Xiong (2012). For the synthesis, see: Yuan et al. (2002).

Experimental top

The ligand H2L was synthesized from terephthaloyl chloride and β-alanine according to a similar method reported by Yuan et al. (2002). 13.6 mg (0.2 mmol) imidazole was dissolved in 10 ml water and then the ligand (30.8 mg, 0.1 mmol) was added in the solution. After H2L dissolved completely, The cupric acetate monohydrate (20.0 mg 0.1 mmol) was added in the solution. The resulting blue solution was filtered and the filtrate was left at room temperature. Blue block crystals of (I) were obtained (36.4 mg, yield ca 65%) after several weeks by slow evaporation of the solvent.

Refinement top

H atoms were placed in calculated positions with C—H = 0.93–0.97 Å, O—H = 0.82–0.85 Å and N—H = 0.86 Å, and refined in riding mode.

Structure description top

The self-assembly of coordination polymers have been one of the popular areas of in chemistry recently, owing to their intriguing structures and various physical properties, such as optical, electronic, magnetic and catalytic properties (Zhang et al. 2012, Wang et al. 2012). From the view point of the intermolecular interactions, the structures of the coordination polymers are mainly governed by the intra- and intermolecular interactions, such as the coordination interaction, hydrogen bonding interaction and π···π stacking as well as the molecular conformations depending on the molecular flexibility (Morrison et al. 2011). Accordingly, the aromatic pseudopeptidic molecules bearing the carboxylate groups could be the ideal building blocks to construct the coordination polymers with the metal ions. The σ-rotation about the N—C and the C—C bonds could induce flexibility in the molecules. The imine group N—H could serve as a better hydrogen-bonding donor and the amide C=O could also act as a better hydrogen-bonding acceptor. Moreover, the aromatic rings in the molecules could contribute to π···π stacking. The carboxlate groups in the molecules could capture the metal ions through the coordination interaction. Therefore, we have designed and synthesized an aromatic pseudopeptidic ligand, 3,3'-[1,4-bis(- benzamido)]dipropanoic acid (H2L). Here, we report the structure of the title helical chain-like coordination polymer, (I), which is derived from aromatic pseudopeptidic ligand, L2-, and imidazole, namely {[CuL(im)2(H2O)]2(H2O)}n (im = imidazole), (I).

X-ray crystallographic analysis revealed that (I) crystallizes in the monoclinic space group C2/c with an asymmetric unit consisting of a divalent CuII cation and a coordinated water molecule residing on a twofold axis, half of an L2- siting across a center of inversion and one imidazole as well as a lattice water molecule. As shown in Fig 1, the five-coordinate CuII cation has an approximately square-pyramidal coordination environment,in which the equatorial plane is composed of two N atoms (N2 and N2i, symmetry code:(i) 1 - x, y, -z + 3/2) from two imidazole molecules and two O atoms (O1 and O1i,symmetry code:(i) 1 - x, y, -z + 3/2) from two symmetry related L2- dianions, while the water O atom (O4) occupies the apical position (Table 1). The apical Cu1—O4 distance is longer than the others,including the Cu—O1 and the Cu—N2 disatnces. The angles O1—Cu1—O1i and N2—Cu—N2i (symmetry code:(i) 1 - x, y, -z + 3/2) are of 177.05 (18) ° and 173.3 (2) °, respectively. It indicates that these five atoms are approximately located in an equatorial plane. The angles O4—Cu1—O1 and O4—Cu1—N2 are of 91.47 (9)° and 93.36 (10)°, which confirm an approximately square-pyramidal coordination geometry. The carboxylate group O1/C1/O2 coordinates to CuII cation in monodentate fashion via the atom O1. As a result, the ligand dianions connect the copper cations to construct an helical chain which runs along the [101] direction. In the formation of the single-strand helical structure, the peptide segment could play an important role. The torsion angle C1/C2/C3/N1 is of 59.8 (5)°, which is very close to 60 °. It shows the gauche conformation of the peptide segment. It also makes the ligand molecule twist twice and finally construct a single-strand helix through connecting the copper cations. It implies that the conformation of the ligand could be crucial in the formation of the helix. In the lattice, there are two types of helix, viz. right-handed and left-handed. Helices of the same type arrange in parallel along the b axis. The inter-chain hydrogen bonding interactions could contribute to the arrangement of the same type helices. The hydrogen bonding interactions between the lattice water molecules and the helices could contribute to the arrangement of the different type helices. However, the shortest center-center distance between two adjacent phenyl rings is beyond 5 Å. It indicates the absence of π···π staking in the crystal. Therefore, the helical chains are stabilized in the lattice mainly by the hydrogen bonding interactions and van der Waals interactions.

For related coordination polymers, see: Morrison et al. (2011); Wang et al. (2012); Zhang & Xiong (2012). For the synthesis, see: Yuan et al. (2002).

Computing details top

Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of (I), a drawing of the asymmetric unit (multi-colored portion) with displacement ellipsoids at the 30% probability level. [symmetry code: (i) 1 - x, y, -z + 3/2; (ii) -x + 1/2, -y + 3/2, -z + 1]
[Figure 2] Fig. 2. The polymeric chain of (I).
catena-Poly[[[aquabis(1H-imidazole-κN3)copper(II)]-µ-3-({4-[(2-carboxylatoethyl)carbamoyl]phenyl}formamido)propanoato-κ2O:O'] dihydrate] top
Crystal data top
[Cu(C14H14N2O6)(C3H4N2)2(H2O)]·2H2OF(000) = 1164
Mr = 560.02Dx = 1.543 Mg m3
Monoclinic, C2/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2ycCell parameters from 1477 reflections
a = 27.752 (5) Åθ = 2.4–20.7°
b = 5.5793 (9) ŵ = 0.97 mm1
c = 17.302 (3) ÅT = 298 K
β = 115.855 (2)°Block, blue
V = 2410.8 (7) Å30.08 × 0.07 × 0.05 mm
Z = 4
Data collection top
Bruker SMART APEXII CCD area-detector
diffractometer
2775 independent reflections
Radiation source: fine-focus sealed tube1632 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.081
phi and ω scansθmax = 27.5°, θmin = 1.6°
Absorption correction: multi-scan
(SADABS; Bruker, 2004)
h = 3536
Tmin = 0.927, Tmax = 0.958k = 77
9928 measured reflectionsl = 2222
Refinement top
Refinement on F20 restraints
Least-squares matrix: fullH-atom parameters constrained
R[F2 > 2σ(F2)] = 0.053 w = 1/[σ2(Fo2) + (0.0621P)2]
where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.139(Δ/σ)max < 0.001
S = 0.99Δρmax = 0.58 e Å3
2775 reflectionsΔρmin = 0.36 e Å3
165 parameters
Crystal data top
[Cu(C14H14N2O6)(C3H4N2)2(H2O)]·2H2OV = 2410.8 (7) Å3
Mr = 560.02Z = 4
Monoclinic, C2/cMo Kα radiation
a = 27.752 (5) ŵ = 0.97 mm1
b = 5.5793 (9) ÅT = 298 K
c = 17.302 (3) Å0.08 × 0.07 × 0.05 mm
β = 115.855 (2)°
Data collection top
Bruker SMART APEXII CCD area-detector
diffractometer
2775 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2004)
1632 reflections with I > 2σ(I)
Tmin = 0.927, Tmax = 0.958Rint = 0.081
9928 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0530 restraints
wR(F2) = 0.139H-atom parameters constrained
S = 0.99Δρmax = 0.58 e Å3
2775 reflectionsΔρmin = 0.36 e Å3
165 parameters
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
C10.44842 (17)0.1862 (8)0.5751 (3)0.0456 (11)
C20.42650 (18)0.2325 (8)0.4802 (2)0.0498 (11)
H2A0.39360.14210.45120.060*
H2B0.45190.17220.46030.060*
C30.41500 (19)0.4960 (9)0.4541 (3)0.0560 (12)
H3A0.44830.58540.48030.067*
H3B0.40180.50810.39230.067*
C40.32380 (18)0.5588 (8)0.4379 (3)0.0494 (11)
C50.28700 (17)0.6644 (8)0.4710 (3)0.0473 (11)
C60.29707 (18)0.8736 (8)0.5187 (3)0.0516 (11)
H60.32850.95850.53170.062*
C70.26074 (18)0.9564 (8)0.5468 (3)0.0520 (12)
H70.26821.09720.57870.062*
C80.38648 (18)0.5107 (8)0.6976 (3)0.0516 (11)
H80.39000.64930.67070.062*
C90.34147 (18)0.4422 (9)0.7033 (3)0.0553 (12)
H90.30900.52350.68250.066*
C100.40408 (18)0.1793 (8)0.7653 (3)0.0494 (11)
H100.42160.04260.79510.059*
Cu10.50000.36573 (12)0.75000.0343 (2)
N10.37603 (14)0.6062 (6)0.4788 (2)0.0509 (9)
H10.38720.70510.52110.061*
N20.42632 (12)0.3451 (6)0.73776 (19)0.0404 (8)
N30.35351 (14)0.2310 (7)0.7454 (2)0.0526 (10)
H30.33200.14460.75730.063*
O10.47315 (11)0.3567 (5)0.62383 (16)0.0461 (7)
O20.43997 (16)0.0138 (6)0.59984 (19)0.0772 (11)
O30.30600 (12)0.4261 (6)0.3745 (2)0.0640 (9)
O40.50000.7658 (7)0.75000.0613 (13)
H40.51720.81470.79920.092*
O50.28059 (12)0.0023 (6)0.7868 (2)0.0658 (9)
H5A0.29440.13160.81310.079*
H5B0.25280.03470.74100.079*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
C10.047 (3)0.047 (3)0.033 (2)0.009 (2)0.009 (2)0.002 (2)
C20.057 (3)0.049 (3)0.034 (2)0.007 (2)0.011 (2)0.002 (2)
C30.053 (3)0.068 (3)0.043 (3)0.002 (2)0.017 (2)0.006 (2)
C40.050 (3)0.047 (3)0.038 (2)0.004 (2)0.006 (2)0.005 (2)
C50.051 (3)0.039 (3)0.037 (2)0.002 (2)0.006 (2)0.0019 (19)
C60.046 (3)0.045 (3)0.049 (3)0.005 (2)0.007 (2)0.002 (2)
C70.055 (3)0.039 (3)0.046 (3)0.002 (2)0.008 (2)0.006 (2)
C80.049 (3)0.057 (3)0.048 (3)0.007 (2)0.020 (2)0.009 (2)
C90.036 (3)0.068 (3)0.056 (3)0.007 (2)0.015 (2)0.005 (3)
C100.047 (3)0.050 (3)0.048 (3)0.003 (2)0.018 (2)0.000 (2)
Cu10.0316 (4)0.0344 (4)0.0312 (4)0.0000.0084 (3)0.000
N10.049 (2)0.052 (2)0.042 (2)0.0002 (19)0.0110 (18)0.0060 (17)
N20.0350 (19)0.047 (2)0.0358 (18)0.0022 (17)0.0122 (15)0.0007 (16)
N30.041 (2)0.063 (3)0.054 (2)0.0093 (19)0.0211 (19)0.006 (2)
O10.0432 (17)0.0548 (18)0.0342 (15)0.0116 (15)0.0112 (13)0.0034 (14)
O20.116 (3)0.040 (2)0.0441 (19)0.000 (2)0.0056 (19)0.0014 (16)
O30.058 (2)0.061 (2)0.054 (2)0.0011 (17)0.0068 (17)0.0206 (16)
O40.075 (3)0.038 (2)0.040 (2)0.0000.004 (2)0.000
O50.052 (2)0.063 (2)0.069 (2)0.0075 (17)0.0134 (17)0.0111 (18)
Geometric parameters (Å, º) top
C1—O21.253 (5)C8—C91.350 (6)
C1—O11.259 (5)C8—N21.374 (5)
C1—C21.503 (5)C8—H80.9300
C2—C31.531 (6)C9—N31.348 (6)
C2—H2A0.9700C9—H90.9300
C2—H2B0.9700C10—N21.312 (5)
C3—N11.460 (5)C10—N31.323 (5)
C3—H3A0.9700C10—H100.9300
C3—H3B0.9700Cu1—N2ii1.965 (3)
C4—O31.234 (5)Cu1—N21.965 (3)
C4—N11.333 (5)Cu1—O1ii1.976 (3)
C4—C51.492 (6)Cu1—O11.976 (3)
C5—C61.386 (6)Cu1—O42.232 (4)
C5—C7i1.396 (6)N1—H10.8600
C6—C71.377 (6)N3—H30.8600
C6—H60.9300O4—H40.8200
C7—C5i1.396 (6)O5—H5A0.8500
C7—H70.9300O5—H5B0.8500
O2—C1—O1124.9 (4)N2—C8—H8125.1
O2—C1—C2118.7 (4)N3—C9—C8105.5 (4)
O1—C1—C2116.4 (4)N3—C9—H9127.3
C1—C2—C3114.9 (4)C8—C9—H9127.3
C1—C2—H2A108.5N2—C10—N3111.4 (4)
C3—C2—H2A108.5N2—C10—H10124.3
C1—C2—H2B108.5N3—C10—H10124.3
C3—C2—H2B108.5N2ii—Cu1—N2173.3 (2)
H2A—C2—H2B107.5N2ii—Cu1—O1ii90.35 (12)
N1—C3—C2113.8 (4)N2—Cu1—O1ii89.48 (12)
N1—C3—H3A108.8N2ii—Cu1—O189.48 (12)
C2—C3—H3A108.8N2—Cu1—O190.35 (11)
N1—C3—H3B108.8O1ii—Cu1—O1177.09 (18)
C2—C3—H3B108.8N2ii—Cu1—O493.36 (10)
H3A—C3—H3B107.7N2—Cu1—O493.36 (10)
O3—C4—N1120.7 (4)O1ii—Cu1—O491.46 (9)
O3—C4—C5120.1 (4)O1—Cu1—O491.46 (9)
N1—C4—C5119.1 (4)C4—N1—C3122.3 (4)
C6—C5—C7i117.6 (4)C4—N1—H1118.8
C6—C5—C4124.5 (4)C3—N1—H1118.8
C7i—C5—C4117.9 (4)C10—N2—C8104.8 (4)
C7—C6—C5120.3 (4)C10—N2—Cu1129.4 (3)
C7—C6—H6119.8C8—N2—Cu1125.8 (3)
C5—C6—H6119.8C10—N3—C9108.5 (4)
C6—C7—C5i122.1 (4)C10—N3—H3125.8
C6—C7—H7119.0C9—N3—H3125.8
C5i—C7—H7119.0C1—O1—Cu1126.4 (3)
C9—C8—N2109.8 (4)Cu1—O4—H4109.5
C9—C8—H8125.1H5A—O5—H5B109.5
Symmetry codes: (i) x+1/2, y+3/2, z+1; (ii) x+1, y, z+3/2.
Hydrogen-bond geometry (Å, º) top
Cg1 is the centroid of the N2/N3/C8–C10 imidazole ring.
D—H···AD—HH···AD···AD—H···A
N1—H1···O2iii0.862.172.965 (5)153
N3—H3···O50.861.902.751 (5)172
O4—H4···O2iv0.821.892.695 (4)167
O5—H5A···O3v0.851.912.731 (4)163
O5—H5B···O3vi0.852.042.810 (4)149
C3—H3B···Cg1vii0.932.753.692 (5)164
Symmetry codes: (iii) x, y+1, z; (iv) x+1, y+1, z+3/2; (v) x, y, z+1/2; (vi) x+1/2, y+1/2, z+1; (vii) x+1/2, y+3/2, z1/2.
Selected bond lengths (Å) top
Cu1—N21.965 (3)Cu1—O42.232 (4)
Cu1—O11.976 (3)
Hydrogen-bond geometry (Å, º) top
Cg1 is the centroid of the N2/N3/C8–C10 imidazole ring.
D—H···AD—HH···AD···AD—H···A
N1—H1···O2i0.862.172.965 (5)153
N3—H3···O50.861.902.751 (5)172
O4—H4···O2ii0.821.892.695 (4)167
O5—H5A···O3iii0.851.912.731 (4)163
O5—H5B···O3iv0.852.042.810 (4)149
C3—H3B···Cg1v0.932.753.692 (5)164
Symmetry codes: (i) x, y+1, z; (ii) x+1, y+1, z+3/2; (iii) x, y, z+1/2; (iv) x+1/2, y+1/2, z+1; (v) x+1/2, y+3/2, z1/2.
 

Acknowledgements

This work was supported by the Department of Education of Anhui Province, China (KJ2007B099).

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