Tetra­kis(1H-benzimidazole-κN3)(nitrato-κO)copper(II) nitrate

Zhou, F.-L.; Ng, S.W.

doi:10.1107/S1600536811018885

metal-organic compounds

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ISSN: 2056-9890

Volume 67| Part 6| June 2011| Page m792

doi:10.1107/S1600536811018885

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Tetrakis(1H-benzimidazole-κN³)(nitrato-κO)copper(II) nitrate

Fu-Lin Zhou ^a and Seik Weng Ng ^b ^*

^aDepartment of Applied Chemistry, Yuncheng University, Yuncheng, Shanxi 044000, People's Republic of China, and ^bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
^*Correspondence e-mail: seikweng@um.edu.my

(Received 12 May 2011; accepted 18 May 2011; online 25 May 2011)

In the title salt, [Cu(NO₃)(C₇H₆N₂)₄]NO₃, one nitrate anion is coordinated to the Cu^II atom, which is also coordinated by the N atoms of four N-heterocycles. The geometry at the metal atom is a square pyramid in which the O atom of the anion occupies the apical position [Cu—O = 2.468 (5) and 2.590 (7) Å in the two independent formula units]. The cation lies on a twofold rotation axis; the coordinated nitrate anion is also disordered about this symmetry element. The lattice anion is also disordered about a twofold rotation axis. In the crystal, the cations are linked to the coordinated and free anions by N—H⋯O hydrogen bonds.

Related literature

For selected Cu^II adducts of imidazole and benzimidazole, see: Dobrzyńska et al. (2010 ); McFadden et al. (1975 , 1976 ); Sieroń (2007 ).

Experimental

Crystal data

[Cu(NO₃)(C₇H₆N₂)₄]NO₃
M_r = 660.12
Orthorhombic, C 222₁
a = 15.7181 (2) Å
b = 24.9338 (3) Å
c = 15.1048 (2) Å
V = 5919.75 (13) Å³
Z = 8
Cu Kα radiation
μ = 1.56 mm⁻¹
T = 293 K
0.10 × 0.08 × 0.06 mm

Data collection

Agilent Xcalibur Eos Gemini diffractometer
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010 ) T_min = 0.860, T_max = 0.912
7285 measured reflections
5038 independent reflections
4779 reflections with I > 2σ(I)
R_int = 0.011

Refinement

R[F² > 2σ(F²)] = 0.040
wR(F²) = 0.117
S = 1.03
5038 reflections
431 parameters
130 restraints
H-atom parameters constrained
Δρ_max = 0.32 e Å⁻³
Δρ_min = −0.31 e Å⁻³
Absolute structure: Flack (1983 ), 1676 Friedel pairs
Flack parameter: −0.05 (3)

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O1ⁱ	0.88	2.21	3.069 (9)	167
N2—H2⋯O3ⁱⁱ	0.88	1.89	2.742 (9)	164
N4—H4⋯O5ⁱⁱ	0.88	2.24	2.964 (9)	139
N4—H4⋯O6ⁱⁱⁱ	0.88	2.10	2.955 (7)	163
N6—H6⋯O7	0.88	2.23	2.998 (14)	146
N8—H8⋯O10	0.88	1.91	2.79 (2)	173
N8—H8⋯O12^iv	0.88	1.87	2.75 (3)	175
Symmetry codes: (i) $[-x, -y+1, z+{\script{1\over 2}}]$ ; (ii) x, -y+1, -z+1; (iii) $[-x+1, -y+1, z-{\script{1\over 2}}]$ ; (iv) x, -y+1, -z+2.

Data collection: CrysAlis PRO (Agilent, 2010); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001 ); software used to prepare material for publication: publCIF (Westrip, 2010 ).

Supporting information

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536811018885/zs2111sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536811018885/zs2111Isup2.hkl

checkCIF report

Comment top

Whereas the coordination sphere of the copper(II) ion (and probably most first-row transition metal ions) readily accomodates four to six imidazole ligands, the space sphere is not large enough to fit a similar number of the related benzimidazole ligands. In the copper nitrate–tetrakis(imidazole) adduct, the nitrate ion is involved in coordination (McFadden et al., 1976) but in the hexakis(imidazole) adduct, the nitrate ion is not (McFadden et al., 1975). The tetrakis(benzimidazole)copper species has been reported for the perchlorate (Dobrzyńska et al., 2010) and the sulfate (Sierón, 2007) only. These two, as well the present nitrate (Scheme I), have the Cu^II atom in a square pyramidal geometry but with the square pyramid being distorted because the ligand crowds out the donor atom of the anion.

In the crystal of the salt, Cu(NO₃)(C₇H₆N₂)₄^.NO₃, one nitrate anion is coordinated to the Cu^II atom, which is also coordinated by the N atoms of four N-heterocycles (Fig. 1). The geometry at the metal atom is a square pyramid in which the O atom of the anion occupies the apical position [Cu–O 2.468 (5), 2.590 (7) Å in the two independent formula units]. The coordinated and lattice nitrates are disordered about this symmetry element. The disorder, which requires space for the anions to rattle around, probably accounts for the somewhat large solvent-accessible voids. Nevertheless, the cations interact with the anions through N–H···O hydrogen bonds (Table 1).

Related literature top

For selected Cu^II adducts of imidazole and benzimidazole, see: Dobrzyńska et al. (2010); McFadden et al. (1975, 1976); Sieroń (2007).

Experimental top

Copper nitrate trihydrate (0.246 g), 1,3-benzimidazole (0.473 g) and water (2 ml) were placed in a 25-ml, Teflon-lined Parr bomb. The bomb was heated at 413 K for 5 days. Blue prismatic crystals were isolated after the bomb was cooled to room temperature over the course of a day.

Computing details top

Data collection: CrysAlis PRO (Agilent, 2010); cell refinement: CrysAlis PRO (Agilent, 2010); data reduction: CrysAlis PRO (Agilent, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).

Figures top

Fig. 1. Thermal ellipsoid plot (Barbour, 2001) of two independent formula units of [Cu(NO₃)(C₇H₆N₂)₄^]NO₃ at the 30% probability level with hydrogen atoms drawn as spheres of arbitrary radius. Symmetry-related benzimidazole ligands are not labeled.

Tetrakis(1H-benzimidazole-κN³)(nitrato-κO)copper(II) nitrate top

Crystal data top

[Cu(NO₃)(C₇H₆N₂)₄]NO₃	F(000) = 2712
M_r = 660.12	D_x = 1.481 Mg m⁻³
Orthorhombic, C222₁	Cu Kα radiation, λ = 1.5418 Å
Hall symbol: C 2c 2	Cell parameters from 5605 reflections
a = 15.7181 (2) Å	θ = 2.9–70.5°
b = 24.9338 (3) Å	µ = 1.56 mm⁻¹
c = 15.1048 (2) Å	T = 293 K
V = 5919.75 (13) Å³	Prism, blue
Z = 8	0.10 × 0.08 × 0.06 mm

Data collection top

Agilent Xcalibur Eos Gemini diffractometer	5038 independent reflections
Radiation source: Enhance (Cu) X-ray Source	4779 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.011
Detector resolution: 16.0356 pixels mm^-1	θ_max = 70.7°, θ_min = 3.3°
ω scans	h = −17→19
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010)	k = −30→12
T_min = 0.860, T_max = 0.912	l = −18→18
7285 measured reflections

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)] = 0.040	H-atom parameters constrained
wR(F²) = 0.117	w = 1/[σ²(F_o²) + (0.081P)² + 2.0279P] where P = (F_o² + 2F_c²)/3
S = 1.03	(Δ/σ)_max = 0.001
5038 reflections	Δρ_max = 0.32 e Å⁻³
431 parameters	Δρ_min = −0.31 e Å⁻³
130 restraints	Absolute structure: Flack (1983), 1676 Friedel pairs
Primary atom site location: structure-invariant direct methods	Absolute structure parameter: −0.05 (3)

Crystal data top

[Cu(NO₃)(C₇H₆N₂)₄]NO₃	V = 5919.75 (13) Å³
M_r = 660.12	Z = 8
Orthorhombic, C222₁	Cu Kα radiation
a = 15.7181 (2) Å	µ = 1.56 mm⁻¹
b = 24.9338 (3) Å	T = 293 K
c = 15.1048 (2) Å	0.10 × 0.08 × 0.06 mm

Data collection top

Agilent Xcalibur Eos Gemini diffractometer	5038 independent reflections
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010)	4779 reflections with I > 2σ(I)
T_min = 0.860, T_max = 0.912	R_int = 0.011
7285 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.040	H-atom parameters constrained
wR(F²) = 0.117	Δρ_max = 0.32 e Å⁻³
S = 1.03	Δρ_min = −0.31 e Å⁻³
5038 reflections	Absolute structure: Flack (1983), 1676 Friedel pairs
431 parameters	Absolute structure parameter: −0.05 (3)
130 restraints

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

	x	y	z	U_iso*/U_eq	Occ. (<1)
Cu1	0.0000	0.417817 (18)	0.2500	0.03722 (14)
Cu2	0.5000	0.38135 (2)	0.7500	0.05537 (17)
O1	−0.0129 (5)	0.5148 (3)	0.1902 (6)	0.0616 (18)	0.50
O2	−0.0161 (7)	0.59502 (16)	0.2397 (10)	0.101 (3)	0.50
O3	0.0386 (5)	0.5315 (3)	0.3167 (6)	0.074 (2)	0.50
O4	0.4732 (5)	0.47882 (18)	0.7442 (8)	0.107 (2)	0.50
O5	0.4466 (6)	0.5603 (3)	0.7658 (10)	0.156 (4)	0.50
O6	0.5717 (4)	0.5318 (3)	0.7891 (6)	0.117 (3)	0.50
O7	0.2850 (7)	0.4949 (5)	0.4463 (6)	0.089 (3)	0.50
O8	0.1786 (3)	0.4969 (4)	0.5351 (5)	0.110 (3)	0.50
O9	0.3011 (5)	0.5214 (4)	0.5815 (5)	0.083 (2)	0.50
O10	0.1531 (11)	0.4740 (12)	0.9487 (14)	0.056 (3)	0.50
O11	0.2713 (2)	0.4965 (11)	1.0107 (14)	0.064 (3)	0.50
O12	0.1518 (13)	0.5215 (12)	1.0668 (14)	0.059 (4)	0.50
N1	0.03749 (15)	0.40674 (10)	0.37505 (15)	0.0423 (5)
N2	0.04470 (17)	0.42208 (11)	0.51886 (16)	0.0509 (6)
H2	0.0323	0.4352	0.5714	0.061*
N3	0.12264 (13)	0.41851 (10)	0.21267 (16)	0.0436 (5)
N4	0.25856 (17)	0.43865 (13)	0.2204 (3)	0.0744 (11)
H4	0.3059	0.4544	0.2377	0.089*
N5	0.46012 (19)	0.37857 (12)	0.6251 (2)	0.0603 (7)
N6	0.4071 (2)	0.40852 (14)	0.5002 (2)	0.0744 (9)
H6	0.3816	0.4302	0.4626	0.089*
N7	0.37999 (19)	0.37880 (11)	0.7923 (2)	0.0598 (7)
N8	0.2594 (2)	0.40803 (13)	0.8488 (2)	0.0708 (8)
H8	0.2231	0.4290	0.8766	0.085*
N9	0.0030 (5)	0.54803 (13)	0.2490 (8)	0.0462 (9)	0.50
N10	0.4980 (6)	0.52280 (17)	0.7649 (6)	0.059 (3)	0.50
N11	0.2553 (4)	0.5029 (6)	0.5215 (4)	0.066 (3)	0.50
N12	0.1927 (3)	0.5001 (13)	1.0062 (17)	0.048 (2)	0.50
C1	0.0063 (2)	0.43455 (11)	0.44316 (18)	0.0478 (6)
H1	−0.0372	0.4597	0.4383	0.057*
C2	0.10595 (12)	0.38578 (8)	0.50119 (11)	0.0494 (6)
C3	0.16641 (15)	0.35976 (10)	0.55281 (9)	0.0660 (9)
H3	0.1702	0.3672	0.6130	0.079*
C4	0.22118 (14)	0.32267 (10)	0.51443 (14)	0.0723 (10)
H4A	0.2616	0.3053	0.5490	0.087*
C5	0.21549 (13)	0.31161 (9)	0.42443 (14)	0.0680 (9)
H5	0.2521	0.2868	0.3988	0.082*
C6	0.15502 (13)	0.33764 (8)	0.37281 (10)	0.0515 (7)
H6A	0.1512	0.3302	0.3126	0.062*
C7	0.10025 (11)	0.37472 (7)	0.41119 (11)	0.0428 (6)
C8	0.18048 (17)	0.44833 (12)	0.2533 (3)	0.0563 (7)
H8A	0.1687	0.4726	0.2983	0.068*
C9	0.16669 (11)	0.38703 (9)	0.15231 (13)	0.0509 (7)
C10	0.13867 (13)	0.34785 (10)	0.09369 (15)	0.0656 (9)
H10	0.0813	0.3389	0.0914	0.079*
C11	0.1964 (2)	0.32205 (10)	0.03854 (15)	0.0909 (16)
H11	0.1777	0.2958	−0.0007	0.109*
C12	0.28222 (19)	0.33543 (13)	0.04201 (19)	0.0989 (18)
H12	0.3209	0.3182	0.0051	0.119*
C13	0.31024 (11)	0.37460 (13)	0.1006 (2)	0.109 (2)
H13	0.3676	0.3836	0.1029	0.131*
C14	0.25248 (13)	0.40040 (10)	0.15578 (17)	0.0682 (10)
C15	0.4189 (3)	0.41740 (16)	0.5867 (3)	0.0720 (10)
H15	0.3998	0.4479	0.6161	0.086*
C16	0.44165 (15)	0.36015 (8)	0.48107 (15)	0.0637 (8)
C17	0.44827 (18)	0.32937 (11)	0.40466 (12)	0.0818 (12)
H17	0.4260	0.3420	0.3516	0.098*
C18	0.48821 (18)	0.27966 (11)	0.40755 (14)	0.0836 (12)
H18	0.4926	0.2591	0.3564	0.100*
C19	0.52152 (16)	0.26073 (8)	0.48686 (18)	0.0764 (11)
H19	0.5482	0.2275	0.4888	0.092*
C20	0.51490 (15)	0.29151 (8)	0.56328 (14)	0.0638 (9)
H20	0.5372	0.2788	0.6163	0.077*
C21	0.47496 (14)	0.34122 (8)	0.56039 (12)	0.0555 (7)
C22	0.3423 (3)	0.41754 (16)	0.8371 (3)	0.0691 (9)
H22	0.3702	0.4479	0.8581	0.083*
C23	0.24100 (14)	0.36003 (8)	0.80981 (14)	0.0602 (8)
C24	0.16767 (11)	0.32924 (11)	0.80189 (16)	0.0787 (12)
H24	0.1166	0.3415	0.8255	0.094*
C25	0.17062 (13)	0.28005 (11)	0.75867 (18)	0.0788 (10)
H25	0.1216	0.2595	0.7534	0.095*
C26	0.24690 (16)	0.26166 (8)	0.72338 (16)	0.0724 (10)
H26	0.2489	0.2288	0.6945	0.087*
C27	0.32023 (12)	0.29245 (8)	0.73130 (14)	0.0616 (8)
H27	0.3713	0.2801	0.7077	0.074*
C28	0.31728 (11)	0.34163 (8)	0.77451 (14)	0.0550 (7)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cu1	0.0294 (2)	0.0434 (2)	0.0389 (2)	0.000	−0.0016 (2)	0.000
Cu2	0.0546 (3)	0.0549 (3)	0.0566 (3)	0.000	0.0062 (4)	0.000
O1	0.068 (4)	0.073 (4)	0.044 (3)	0.014 (3)	−0.013 (3)	−0.021 (3)
O2	0.115 (8)	0.055 (2)	0.134 (7)	0.020 (3)	−0.018 (6)	0.000 (4)
O3	0.086 (5)	0.091 (5)	0.044 (3)	0.008 (4)	−0.009 (4)	−0.006 (3)
O4	0.129 (6)	0.060 (2)	0.133 (5)	−0.009 (3)	−0.036 (6)	0.003 (5)
O5	0.118 (6)	0.138 (6)	0.211 (9)	0.052 (5)	0.003 (7)	−0.033 (7)
O6	0.061 (4)	0.142 (6)	0.147 (6)	−0.025 (4)	0.007 (4)	0.027 (5)
O7	0.089 (6)	0.090 (6)	0.089 (6)	−0.006 (6)	0.003 (5)	0.001 (5)
O8	0.057 (3)	0.101 (4)	0.174 (8)	−0.019 (4)	0.015 (4)	−0.031 (6)
O9	0.063 (4)	0.095 (5)	0.090 (5)	−0.007 (3)	0.019 (4)	0.011 (4)
O10	0.046 (4)	0.073 (6)	0.050 (7)	0.006 (4)	0.003 (4)	−0.012 (6)
O11	0.0424 (17)	0.071 (6)	0.078 (9)	0.005 (4)	−0.006 (3)	0.018 (6)
O12	0.061 (5)	0.073 (6)	0.043 (6)	−0.007 (4)	0.010 (4)	−0.006 (4)
N1	0.0368 (10)	0.0522 (12)	0.0380 (10)	0.0020 (9)	−0.0027 (9)	−0.0038 (9)
N2	0.0533 (14)	0.0601 (14)	0.0394 (12)	−0.0063 (12)	0.0041 (11)	−0.0073 (11)
N3	0.0311 (10)	0.0538 (12)	0.0459 (11)	0.0016 (10)	−0.0018 (9)	0.0093 (10)
N4	0.0348 (13)	0.0754 (18)	0.113 (3)	−0.0051 (12)	−0.0058 (15)	0.0349 (19)
N5	0.0558 (15)	0.0634 (15)	0.0617 (16)	0.0083 (13)	0.0050 (14)	0.0001 (13)
N6	0.0720 (19)	0.078 (2)	0.0736 (19)	0.0117 (17)	−0.0163 (17)	0.0069 (16)
N7	0.0567 (15)	0.0606 (15)	0.0621 (16)	0.0058 (13)	0.0081 (13)	−0.0081 (13)
N8	0.075 (2)	0.0740 (19)	0.0630 (16)	0.0228 (16)	0.0177 (16)	−0.0025 (15)
N9	0.054 (2)	0.0477 (17)	0.0371 (15)	−0.017 (5)	−0.0012 (19)	−0.002 (8)
N10	0.052 (2)	0.058 (2)	0.069 (7)	0.016 (4)	0.019 (4)	−0.007 (3)
N11	0.052 (3)	0.061 (4)	0.084 (9)	0.003 (4)	0.006 (3)	0.016 (7)
N12	0.048 (2)	0.0502 (19)	0.047 (6)	−0.009 (6)	−0.016 (6)	0.009 (4)
C1	0.0430 (14)	0.0548 (13)	0.0455 (13)	−0.0012 (14)	0.0056 (14)	−0.0086 (11)
C2	0.0499 (15)	0.0543 (15)	0.0441 (14)	−0.0120 (13)	−0.0027 (13)	0.0022 (12)
C3	0.077 (2)	0.075 (2)	0.0459 (16)	−0.0086 (19)	−0.0147 (17)	0.0073 (16)
C4	0.070 (2)	0.084 (2)	0.062 (2)	0.0121 (19)	−0.0175 (18)	0.0206 (19)
C5	0.066 (2)	0.073 (2)	0.066 (2)	0.0192 (19)	0.0028 (17)	0.0113 (17)
C6	0.0521 (17)	0.0542 (16)	0.0483 (15)	0.0105 (14)	0.0007 (13)	0.0039 (13)
C7	0.0389 (13)	0.0467 (13)	0.0428 (13)	−0.0043 (11)	−0.0016 (12)	0.0023 (11)
C8	0.0377 (13)	0.0582 (15)	0.0730 (18)	−0.0052 (11)	−0.0081 (16)	0.0109 (19)
C9	0.0403 (14)	0.0627 (17)	0.0498 (15)	0.0143 (13)	0.0072 (13)	0.0207 (14)
C10	0.074 (2)	0.075 (2)	0.0479 (16)	0.0285 (19)	−0.0030 (17)	0.0040 (16)
C11	0.110 (4)	0.098 (3)	0.064 (2)	0.060 (3)	0.017 (2)	0.008 (2)
C12	0.107 (4)	0.108 (4)	0.081 (3)	0.052 (3)	0.040 (3)	0.023 (3)
C13	0.055 (2)	0.127 (4)	0.145 (5)	0.043 (3)	0.049 (3)	0.080 (4)
C14	0.0476 (17)	0.078 (2)	0.079 (2)	0.0113 (16)	0.0109 (17)	0.035 (2)
C15	0.064 (2)	0.066 (2)	0.085 (3)	0.0150 (18)	−0.003 (2)	−0.005 (2)
C16	0.0464 (16)	0.073 (2)	0.072 (2)	−0.0007 (15)	−0.0037 (16)	0.0002 (18)
C17	0.065 (2)	0.117 (3)	0.063 (2)	−0.009 (2)	−0.0083 (19)	−0.014 (2)
C18	0.062 (2)	0.098 (3)	0.091 (3)	−0.002 (2)	0.002 (2)	−0.033 (2)
C19	0.060 (2)	0.069 (2)	0.100 (3)	−0.0017 (17)	−0.002 (2)	−0.019 (2)
C20	0.057 (2)	0.0583 (17)	0.076 (2)	0.0025 (15)	0.0054 (16)	0.0019 (15)
C21	0.0445 (16)	0.0617 (17)	0.0604 (17)	−0.0052 (13)	0.0073 (13)	−0.0039 (15)
C22	0.078 (2)	0.0638 (19)	0.066 (2)	0.0076 (19)	0.0103 (19)	−0.0075 (17)
C23	0.0575 (19)	0.078 (2)	0.0449 (15)	0.0174 (17)	0.0030 (14)	0.0051 (15)
C24	0.0525 (19)	0.124 (4)	0.059 (2)	0.008 (2)	0.0070 (16)	0.018 (2)
C25	0.074 (2)	0.101 (3)	0.061 (2)	−0.016 (2)	−0.004 (2)	0.004 (2)
C26	0.083 (2)	0.079 (2)	0.0543 (18)	−0.012 (2)	0.0025 (18)	0.0043 (16)
C27	0.065 (2)	0.0661 (19)	0.0533 (19)	0.0039 (16)	0.0013 (15)	−0.0012 (14)
C28	0.0525 (17)	0.0644 (18)	0.0481 (15)	0.0077 (15)	0.0012 (13)	0.0038 (13)

Geometric parameters (Å, º) top

Cu1—N1ⁱ	1.998 (2)	C2—C3	1.3900
Cu1—N1	1.998 (2)	C2—C7	1.3900
Cu1—N3	2.008 (2)	C3—C4	1.3900
Cu1—N3ⁱ	2.008 (2)	C3—H3	0.9300
Cu1—O1	2.590 (7)	C4—C5	1.3900
Cu2—N5	1.989 (3)	C4—H4A	0.9300
Cu2—N5ⁱⁱ	1.989 (3)	C5—C6	1.3900
Cu2—N7ⁱⁱ	1.993 (3)	C5—H5	0.9300
Cu2—N7	1.993 (3)	C6—C7	1.3900
Cu2—O4	2.468 (5)	C6—H6A	0.9300
O1—N9	1.240 (7)	C8—H8A	0.9300
O2—N9	1.218 (5)	C9—C10	1.3900
O3—N9	1.236 (9)	C9—C14	1.3900
O4—N10	1.205 (6)	C10—C11	1.3900
O5—N10	1.234 (7)	C10—H10	0.9300
O6—N10	1.237 (8)	C11—C12	1.3900
O7—N11	1.244 (8)	C11—H11	0.9300
O8—N11	1.231 (7)	C12—C13	1.3900
O9—N11	1.246 (8)	C12—H12	0.9300
O10—N12	1.250 (8)	C13—C14	1.3900
O11—N12	1.240 (6)	C13—H13	0.9300
O12—N12	1.239 (8)	C15—H15	0.9300
N1—C1	1.334 (4)	C16—C17	1.3900
N1—C7	1.382 (3)	C16—C21	1.3900
N2—C1	1.330 (4)	C17—C18	1.3900
N2—C2	1.348 (3)	C17—H17	0.9300
N2—H2	0.8800	C18—C19	1.3900
N3—C8	1.325 (4)	C18—H18	0.9300
N3—C9	1.388 (3)	C19—C20	1.3900
N4—C8	1.346 (4)	C19—H19	0.9300
N4—C14	1.368 (4)	C20—C21	1.3900
N4—H4	0.8800	C20—H20	0.9300
N5—C15	1.301 (5)	C22—H22	0.9300
N5—C21	1.370 (3)	C23—C24	1.3900
N6—C15	1.338 (6)	C23—C28	1.3900
N6—C16	1.354 (4)	C24—C25	1.3900
N6—H6	0.8800	C24—H24	0.9300
N7—C22	1.320 (5)	C25—C26	1.3900
N7—C28	1.379 (3)	C25—H25	0.9300
N8—C22	1.337 (5)	C26—C27	1.3900
N8—C23	1.365 (4)	C26—H26	0.9300
N8—H8	0.8800	C27—C28	1.3900
C1—H1	0.9300	C27—H27	0.9300

N1ⁱ—Cu1—N1	164.10 (14)	C4—C5—H5	120.0
N1ⁱ—Cu1—N3	91.08 (10)	C6—C5—H5	120.0
N1—Cu1—N3	89.06 (10)	C7—C6—C5	120.0
N1ⁱ—Cu1—N3ⁱ	89.06 (10)	C7—C6—H6A	120.0
N1—Cu1—N3ⁱ	91.08 (10)	C5—C6—H6A	120.0
N3—Cu1—N3ⁱ	179.02 (14)	N1—C7—C6	131.44 (15)
N1ⁱ—Cu1—O1	77.06 (17)	N1—C7—C2	108.53 (15)
N1—Cu1—O1	118.83 (17)	C6—C7—C2	120.0
N3—Cu1—O1	88.23 (19)	N3—C8—N4	110.7 (3)
N3ⁱ—Cu1—O1	90.9 (2)	N3—C8—H8A	124.6
N5—Cu2—N5ⁱⁱ	176.00 (17)	N4—C8—H8A	124.6
N5—Cu2—N7ⁱⁱ	89.60 (13)	N3—C9—C10	131.12 (17)
N5ⁱⁱ—Cu2—N7ⁱⁱ	90.27 (13)	N3—C9—C14	108.88 (17)
N5—Cu2—N7	90.27 (13)	C10—C9—C14	120.0
N5ⁱⁱ—Cu2—N7	89.60 (13)	C9—C10—C11	120.0
N7ⁱⁱ—Cu2—N7	176.34 (17)	C9—C10—H10	120.0
N5—Cu2—O4	87.0 (3)	C11—C10—H10	120.0
N5ⁱⁱ—Cu2—O4	97.0 (3)	C10—C11—C12	120.0
N7ⁱⁱ—Cu2—O4	100.5 (2)	C10—C11—H11	120.0
N7—Cu2—O4	83.2 (2)	C12—C11—H11	120.0
N9—O1—Cu1	111.0 (5)	C13—C12—C11	120.0
N10—O4—Cu2	146.3 (6)	C13—C12—H12	120.0
C1—N1—C7	105.0 (2)	C11—C12—H12	120.0
C1—N1—Cu1	123.3 (2)	C12—C13—C14	120.0
C7—N1—Cu1	131.62 (17)	C12—C13—H13	120.0
C1—N2—C2	108.1 (2)	C14—C13—H13	120.0
C1—N2—H2	125.9	N4—C14—C13	134.80 (19)
C2—N2—H2	125.9	N4—C14—C9	105.18 (19)
C8—N3—C9	106.2 (2)	C13—C14—C9	120.0
C8—N3—Cu1	122.2 (2)	N5—C15—N6	112.4 (4)
C9—N3—Cu1	131.17 (17)	N5—C15—H15	123.8
C8—N4—C14	109.0 (3)	N6—C15—H15	123.8
C8—N4—H4	125.5	N6—C16—C17	134.4 (2)
C14—N4—H4	125.5	N6—C16—C21	105.6 (2)
C15—N5—C21	105.8 (3)	C17—C16—C21	120.0
C15—N5—Cu2	123.6 (3)	C16—C17—C18	120.0
C21—N5—Cu2	130.3 (2)	C16—C17—H17	120.0
C15—N6—C16	107.5 (3)	C18—C17—H17	120.0
C15—N6—H6	126.3	C19—C18—C17	120.0
C16—N6—H6	126.3	C19—C18—H18	120.0
C22—N7—C28	105.7 (3)	C17—C18—H18	120.0
C22—N7—Cu2	124.5 (3)	C20—C19—C18	120.0
C28—N7—Cu2	129.45 (19)	C20—C19—H19	120.0
C22—N8—C23	107.8 (3)	C18—C19—H19	120.0
C22—N8—H8	126.1	C19—C20—C21	120.0
C23—N8—H8	126.1	C19—C20—H20	120.0
O2—N9—O3	121.8 (8)	C21—C20—H20	120.0
O2—N9—O1	120.7 (9)	N5—C21—C20	131.35 (19)
O3—N9—O1	117.5 (5)	N5—C21—C16	108.65 (19)
O4—N10—O5	118.7 (9)	C20—C21—C16	120.0
O4—N10—O6	123.0 (7)	N7—C22—N8	112.0 (4)
O5—N10—O6	118.2 (7)	N7—C22—H22	124.0
O8—N11—O7	120.0 (7)	N8—C22—H22	124.0
O8—N11—O9	119.3 (7)	N8—C23—C24	134.2 (2)
O7—N11—O9	120.4 (7)	N8—C23—C28	105.8 (2)
O11—N12—O12	120.5 (10)	C24—C23—C28	120.0
O11—N12—O10	119.7 (10)	C23—C24—C25	120.0
O12—N12—O10	118.6 (6)	C23—C24—H24	120.0
N2—C1—N1	112.0 (3)	C25—C24—H24	120.0
N2—C1—H1	124.0	C26—C25—C24	120.0
N1—C1—H1	124.0	C26—C25—H25	120.0
N2—C2—C3	133.68 (17)	C24—C25—H25	120.0
N2—C2—C7	106.31 (17)	C27—C26—C25	120.0
C3—C2—C7	120.0	C27—C26—H26	120.0
C2—C3—C4	120.0	C25—C26—H26	120.0
C2—C3—H3	120.0	C26—C27—C28	120.0
C4—C3—H3	120.0	C26—C27—H27	120.0
C3—C4—C5	120.0	C28—C27—H27	120.0
C3—C4—H4A	120.0	N7—C28—C27	131.33 (18)
C5—C4—H4A	120.0	N7—C28—C23	108.66 (18)
C4—C5—C6	120.0	C27—C28—C23	120.0

N1ⁱ—Cu1—O1—N9	177.7 (5)	Cu1—N3—C8—N4	175.3 (2)
N1—Cu1—O1—N9	−2.8 (5)	C14—N4—C8—N3	−0.6 (4)
N3—Cu1—O1—N9	−90.8 (4)	C8—N3—C9—C10	178.5 (2)
N3ⁱ—Cu1—O1—N9	88.9 (4)	Cu1—N3—C9—C10	5.7 (3)
N5—Cu2—O4—N10	−139.8 (18)	C8—N3—C9—C14	−2.2 (3)
N5ⁱⁱ—Cu2—O4—N10	40.8 (18)	Cu1—N3—C9—C14	−174.97 (16)
N7ⁱⁱ—Cu2—O4—N10	−50.8 (18)	N3—C9—C10—C11	179.3 (2)
N7—Cu2—O4—N10	129.6 (18)	C14—C9—C10—C11	0.0
N1ⁱ—Cu1—N1—C1	−136.0 (2)	C9—C10—C11—C12	0.0
N3—Cu1—N1—C1	133.4 (2)	C10—C11—C12—C13	0.0
N3ⁱ—Cu1—N1—C1	−45.7 (2)	C11—C12—C13—C14	0.0
O1—Cu1—N1—C1	45.9 (3)	C8—N4—C14—C13	−179.2 (2)
N1ⁱ—Cu1—N1—C7	49.0 (2)	C8—N4—C14—C9	−0.8 (3)
N3—Cu1—N1—C7	−41.7 (2)	C12—C13—C14—N4	178.3 (3)
N3ⁱ—Cu1—N1—C7	139.3 (2)	C12—C13—C14—C9	0.0
O1—Cu1—N1—C7	−129.1 (3)	N3—C9—C14—N4	1.8 (2)
N1ⁱ—Cu1—N3—C8	146.8 (2)	C10—C9—C14—N4	−178.7 (2)
N1—Cu1—N3—C8	−49.1 (2)	N3—C9—C14—C13	−179.4 (2)
O1—Cu1—N3—C8	69.8 (3)	C10—C9—C14—C13	0.0
N1ⁱ—Cu1—N3—C9	−41.4 (2)	C21—N5—C15—N6	−1.3 (5)
N1—Cu1—N3—C9	122.7 (2)	Cu2—N5—C15—N6	173.2 (3)
O1—Cu1—N3—C9	−118.4 (3)	C16—N6—C15—N5	1.2 (5)
N7ⁱⁱ—Cu2—N5—C15	−115.3 (3)	C15—N6—C16—C17	178.9 (3)
N7—Cu2—N5—C15	68.3 (3)	C15—N6—C16—C21	−0.5 (4)
O4—Cu2—N5—C15	−14.8 (4)	N6—C16—C17—C18	−179.4 (3)
N7ⁱⁱ—Cu2—N5—C21	57.7 (3)	C21—C16—C17—C18	0.0
N7—Cu2—N5—C21	−118.6 (3)	C16—C17—C18—C19	0.0
O4—Cu2—N5—C21	158.2 (4)	C17—C18—C19—C20	0.0
N5—Cu2—N7—C22	−116.5 (3)	C18—C19—C20—C21	0.0
N5ⁱⁱ—Cu2—N7—C22	67.5 (3)	C15—N5—C21—C20	−178.8 (3)
O4—Cu2—N7—C22	−29.6 (4)	Cu2—N5—C21—C20	7.2 (4)
N5—Cu2—N7—C28	55.6 (3)	C15—N5—C21—C16	0.9 (3)
N5ⁱⁱ—Cu2—N7—C28	−120.4 (3)	Cu2—N5—C21—C16	−173.1 (2)
O4—Cu2—N7—C28	142.5 (4)	C19—C20—C21—N5	179.8 (3)
Cu1—O1—N9—O2	−165.0 (7)	C19—C20—C21—C16	0.0
Cu1—O1—N9—O3	15.0 (7)	N6—C16—C21—N5	−0.3 (3)
Cu2—O4—N10—O5	−159.8 (14)	C17—C16—C21—N5	−179.8 (2)
Cu2—O4—N10—O6	17 (2)	N6—C16—C21—C20	179.6 (2)
C2—N2—C1—N1	2.0 (3)	C17—C16—C21—C20	0.0
C7—N1—C1—N2	−0.2 (3)	C28—N7—C22—N8	−0.5 (4)
Cu1—N1—C1—N2	−176.4 (2)	Cu2—N7—C22—N8	173.2 (3)
C1—N2—C2—C3	178.3 (2)	C23—N8—C22—N7	0.3 (4)
C1—N2—C2—C7	−2.8 (3)	C22—N8—C23—C24	178.5 (2)
N2—C2—C3—C4	178.8 (3)	C22—N8—C23—C28	0.0 (3)
C7—C2—C3—C4	0.0	N8—C23—C24—C25	−178.3 (3)
C2—C3—C4—C5	0.0	C28—C23—C24—C25	0.0
C3—C4—C5—C6	0.0	C23—C24—C25—C26	0.0
C4—C5—C6—C7	0.0	C24—C25—C26—C27	0.0
C1—N1—C7—C6	−179.5 (2)	C25—C26—C27—C28	0.0
Cu1—N1—C7—C6	−3.8 (3)	C22—N7—C28—C27	−178.4 (2)
C1—N1—C7—C2	−1.6 (2)	Cu2—N7—C28—C27	8.3 (4)
Cu1—N1—C7—C2	174.14 (17)	C22—N7—C28—C23	0.5 (3)
C5—C6—C7—N1	177.7 (2)	Cu2—N7—C28—C23	−172.7 (2)
C5—C6—C7—C2	0.0	C26—C27—C28—N7	178.8 (3)
N2—C2—C7—N1	2.7 (2)	C26—C27—C28—C23	0.0
C3—C2—C7—N1	−178.2 (2)	N8—C23—C28—N7	−0.3 (2)
N2—C2—C7—C6	−179.1 (2)	C24—C23—C28—N7	−179.1 (2)
C3—C2—C7—C6	0.0	N8—C23—C28—C27	178.7 (2)
C9—N3—C8—N4	1.7 (4)	C24—C23—C28—C27	0.0

Symmetry codes: (i) −x, y, −z+1/2; (ii) −x+1, y, −z+3/2.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N2—H2···O1ⁱⁱⁱ	0.88	2.21	3.069 (9)	167
N2—H2···O3^iv	0.88	1.89	2.742 (9)	164
N4—H4···O5^iv	0.88	2.24	2.964 (9)	139
N4—H4···O6^v	0.88	2.10	2.955 (7)	163
N6—H6···O7	0.88	2.23	2.998 (14)	146
N8—H8···O10	0.88	1.91	2.79 (2)	173
N8—H8···O12^vi	0.88	1.87	2.75 (3)	175

Symmetry codes: (iii) −x, −y+1, z+1/2; (iv) x, −y+1, −z+1; (v) −x+1, −y+1, z−1/2; (vi) x, −y+1, −z+2.

Experimental details

Crystal data
Chemical formula	[Cu(NO₃)(C₇H₆N₂)₄]NO₃
M_r	660.12
Crystal system, space group	Orthorhombic, C222₁
Temperature (K)	293
a, b, c (Å)	15.7181 (2), 24.9338 (3), 15.1048 (2)
V (Å³)	5919.75 (13)
Z	8
Radiation type	Cu Kα
µ (mm⁻¹)	1.56
Crystal size (mm)	0.10 × 0.08 × 0.06

Data collection
Diffractometer	Agilent Xcalibur Eos Gemini diffractometer
Absorption correction	Multi-scan (CrysAlis PRO; Agilent, 2010)
T_min, T_max	0.860, 0.912
No. of measured, independent and observed [I > 2σ(I)] reflections	7285, 5038, 4779
R_int	0.011
(sin θ/λ)_max (Å⁻¹)	0.612

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.040, 0.117, 1.03
No. of reflections	5038
No. of parameters	431
No. of restraints	130
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.32, −0.31
Absolute structure	Flack (1983), 1676 Friedel pairs
Absolute structure parameter	−0.05 (3)

Computer programs: CrysAlis PRO (Agilent, 2010), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2010).

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N2—H2···O1ⁱ	0.88	2.21	3.069 (9)	167
N2—H2···O3ⁱⁱ	0.88	1.89	2.742 (9)	164
N4—H4···O5ⁱⁱ	0.88	2.24	2.964 (9)	139
N4—H4···O6ⁱⁱⁱ	0.88	2.10	2.955 (7)	163
N6—H6···O7	0.88	2.23	2.998 (14)	146
N8—H8···O10	0.88	1.91	2.79 (2)	173
N8—H8···O12^iv	0.88	1.87	2.75 (3)	175

Symmetry codes: (i) −x, −y+1, z+1/2; (ii) x, −y+1, −z+1; (iii) −x+1, −y+1, z−1/2; (iv) x, −y+1, −z+2.

Acknowledgements

We thank Yuncheng University and the University of Malaya for supporting this study.

References

Agilent (2010). CrysAlis PRO. Agilent Technologies, Yarnton, Oxfordshire, England. Google Scholar
Barbour, L. J. (2001). J. Supramol. Chem. 1, 189–191. CrossRef CAS Google Scholar
Dobrzyńska, D., Janczak, J., Wojciechowska, A. & Helios, K. (2010). J. Mol. Struct. 973, 62–68. Google Scholar
Flack, H. D. (1983). Acta Cryst. A39, 876–881. CrossRef CAS Web of Science IUCr Journals Google Scholar
McFadden, D. L., McPhail, A. T., Garner, C. D. & Mabbs, F. E. (1975). J. Chem. Soc. Dalton Trans. pp. 263–268. CSD CrossRef Google Scholar
McFadden, D. L., McPhail, A. T., Gross, P. M., Garner, C. D. & Mabbs, F. E. (1976). J. Chem. Soc. Dalton Trans. pp. 47–52. CrossRef Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Sieroń, L. (2007). Acta Cryst. E63, m579–m580. Web of Science CSD CrossRef IUCr Journals Google Scholar
Westrip, S. P. (2010). J. Appl. Cryst. 43, 920–925. Web of Science CrossRef CAS IUCr Journals Google Scholar