{N,N-Dimethyl-N′-[1-(2-pyrid­yl)ethyl­idene]propane-1,3-diamine}bis(thio­cyanato-κN)­copper(II)

Xue, L.-W.; Zhao, G.-Q.; Han, Y.-J.; Chen, L.-H.; Peng, Q.-L.

doi:10.1107/S1600536810036378

metal-organic compounds

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 66| Part 10| October 2010| Page m1274

doi:10.1107/S1600536810036378

Open

access

{N,N-Dimethyl-N′-[1-(2-pyridyl)ethylidene]propane-1,3-diamine}bis(thiocyanato-κN)copper(II)

Ling-Wei Xue,^a ^* Gan-Qing Zhao,^a Yong-Jun Han,^a Li-Hua Chen ^a and Qin-Long Peng ^a

^aCollege of Chemistry and Chemical Engineering, Pingdingshan University, Pingdingshan, Henan 467000, People's Republic of China
^*Correspondence e-mail: pdsuchemistry@163.com

(Received 10 September 2010; accepted 10 September 2010; online 18 September 2010)

In the title complex, [Cu(NCS)₂(C₁₂H₁₉N₃)], the Cu^II atom is five-coordinated in a square-pyramidal geometry defined by one pyridine N, one imine N, and one amine N atom of the tridentate Schiff base ligand and two N-bonded thiocyanate ions (one of the latter occupying the apical site). The three bridging C atoms and the two terminal C atoms of the Schiff base are disordered over two sets of sites, with occupancies of 0.465 (2) and 0.535 (2).

Related literature

For a related structure and background to Schiff bases, see: Xue et al. (2010 ).

Experimental

Crystal data

[Cu(NCS)₂(C₁₂H₁₉N₃)]
M_r = 385.00
Monoclinic, P 2₁ /c
a = 13.723 (2) Å
b = 7.2380 (12) Å
c = 18.237 (3) Å
β = 103.559 (2)°
V = 1760.9 (5) Å³
Z = 4
Mo Kα radiation
μ = 1.48 mm⁻¹
T = 298 K
0.23 × 0.21 × 0.21 mm

Data collection

Bruker SMART CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ) T_min = 0.727, T_max = 0.746
13886 measured reflections
3816 independent reflections
2698 reflections with I > 2σ(I)
R_int = 0.041

Refinement

R[F² > 2σ(F²)] = 0.042
wR(F²) = 0.111
S = 1.04
3816 reflections
237 parameters
16 restraints
H-atom parameters constrained
Δρ_max = 0.57 e Å⁻³
Δρ_min = −0.47 e Å⁻³

Table 1
Selected bond lengths (Å)

Cu1—N5	1.955 (3)
Cu1—N2	2.013 (3)
Cu1—N1	2.047 (3)
Cu1—N3	2.078 (3)
Cu1—N4	2.153 (3)

Data collection: SMART (Bruker, 1998 ); cell refinement: SAINT (Bruker, 1998); 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.

Supporting information

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536810036378/hb5636sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536810036378/hb5636Isup2.hkl

checkCIF report

Comment top

Recently, we have reported a copper(II) complex with a Schiff base ligand (Xue et al., 2010). In this paper, a new thiocyanato-coordinated mononuclear copper(II) complex with the Schiff base N,N-dimethyl-N'-(1-pyridin-2-ylethylidene)propane-1,3-diamine, is reported.

The Cu atom in the complex, Fig. 1, is five-coordinate in a square pyramidal geometry, with one pyridine N, one imine N, and one amine N atoms of a Schiff base ligand, and with one thiocyanate N atom, occupying the basal plane, and with another thiocyanate N atom occupying the apical position. The Cu atom displaced 0.306 (2) Å from the plane defined by the four basal donor atoms. The slight distortion of the square pyramidal coordination can be observed from the coordinate bond lengths and angles (Table 1).

Related literature top

For a related structure and background to Schiff bases, see: Xue et al. (2010).

Experimental top

2-Acetylpyridine (121 mg, 1.0 mmol), N,Ndimethylpropane-1,3-diamine (102 mg, 1.0 mmol), ammonium thiocyanate (76 mg, 1.0 mmol), and copper acetate monohydrate (199.2 mg, 1.0 mmol) were dissolved in methanol (80 ml). The mixture was stirred for two hours at room temperature. The resulting solution was left in air for a few days, yielding blue blocks of (I).

Computing details top

Data collection: SMART (Bruker, 1998); cell refinement: SAINT (Bruker, 1998); data reduction: SAINT (Bruker, 1998); 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 (Sheldrick, 2008).

Figures top

Fig. 1. The structure of the title complex with 30% probability displacement ellipsoids.

{N,N-Dimethyl-N'-[1-(2-pyridyl)ethylidene]propane-1,3- diamine}bis(thiocyanato-κN)copper(II) top

Crystal data top

[Cu(NCS)₂(C₁₂H₁₉N₃)]	F(000) = 796
M_r = 385.00	D_x = 1.452 Mg m⁻³
Monoclinic, P2₁/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 2747 reflections
a = 13.723 (2) Å	θ = 2.3–24.5°
b = 7.2380 (12) Å	µ = 1.48 mm⁻¹
c = 18.237 (3) Å	T = 298 K
β = 103.559 (2)°	Block, blue
V = 1760.9 (5) Å³	0.23 × 0.21 × 0.21 mm
Z = 4

Data collection top

Bruker SMART CCD diffractometer	3816 independent reflections
Radiation source: fine-focus sealed tube	2698 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.041
ω scans	θ_max = 27.0°, θ_min = 2.3°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −15→17
T_min = 0.727, T_max = 0.746	k = −9→9
13886 measured reflections	l = −23→23

Refinement top

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)] = 0.042	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.111	H-atom parameters constrained
S = 1.04	w = 1/[σ²(F_o²) + (0.0492P)² + 0.6842P] where P = (F_o² + 2F_c²)/3
3816 reflections	(Δ/σ)_max < 0.001
237 parameters	Δρ_max = 0.57 e Å⁻³
16 restraints	Δρ_min = −0.47 e Å⁻³

Crystal data top

[Cu(NCS)₂(C₁₂H₁₉N₃)]	V = 1760.9 (5) Å³
M_r = 385.00	Z = 4
Monoclinic, P2₁/c	Mo Kα radiation
a = 13.723 (2) Å	µ = 1.48 mm⁻¹
b = 7.2380 (12) Å	T = 298 K
c = 18.237 (3) Å	0.23 × 0.21 × 0.21 mm
β = 103.559 (2)°

Data collection top

Bruker SMART CCD diffractometer	3816 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	2698 reflections with I > 2σ(I)
T_min = 0.727, T_max = 0.746	R_int = 0.041
13886 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.042	16 restraints
wR(F²) = 0.111	H-atom parameters constrained
S = 1.04	Δρ_max = 0.57 e Å⁻³
3816 reflections	Δρ_min = −0.47 e Å⁻³
237 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

	x	y	z	U_iso*/U_eq	Occ. (<1)
Cu1	0.24814 (3)	0.82783 (5)	0.39009 (2)	0.04378 (15)
N1	0.3853 (2)	0.8651 (4)	0.36614 (15)	0.0459 (7)
N2	0.2846 (2)	1.0789 (4)	0.43585 (14)	0.0457 (6)
N4	0.2763 (2)	0.7053 (4)	0.50065 (18)	0.0594 (8)
N5	0.2289 (2)	0.5969 (5)	0.33292 (18)	0.0624 (8)
S1	0.2253 (2)	0.6298 (3)	0.63328 (10)	0.1725 (10)
S2	0.23557 (7)	0.28351 (14)	0.24673 (6)	0.0611 (3)
C1	0.4337 (3)	0.7542 (6)	0.3285 (2)	0.0647 (10)
H1	0.4028	0.6446	0.3090	0.078*
C2	0.5270 (3)	0.7936 (7)	0.3170 (2)	0.0752 (13)
H2	0.5584	0.7124	0.2904	0.090*
C3	0.5724 (3)	0.9539 (7)	0.3454 (2)	0.0716 (12)
H3	0.6358	0.9835	0.3388	0.086*
C4	0.5236 (3)	1.0714 (6)	0.3839 (2)	0.0601 (10)
H4	0.5533	1.1821	0.4032	0.072*
C5	0.4300 (2)	1.0238 (5)	0.39356 (17)	0.0443 (7)
C6	0.3702 (2)	1.1400 (4)	0.43399 (18)	0.0452 (8)
C7	0.4155 (3)	1.3171 (5)	0.4690 (2)	0.0701 (12)
H7A	0.4090	1.4104	0.4307	0.105*
H7B	0.4851	1.2979	0.4921	0.105*
H7C	0.3812	1.3563	0.5065	0.105*
N3	0.0939 (2)	0.8665 (4)	0.36804 (17)	0.0606 (8)	0.465 (11)
C8	0.2202 (3)	1.1843 (5)	0.4750 (2)	0.0684 (11)	0.465 (11)
H8A	0.2116	1.3077	0.4538	0.082*	0.465 (11)
H8B	0.2549	1.1961	0.5276	0.082*	0.465 (11)
C9	0.1197 (6)	1.1045 (16)	0.4713 (5)	0.062 (3)	0.465 (11)
H9A	0.0797	1.1912	0.4924	0.074*	0.465 (11)
H9B	0.1263	0.9918	0.5009	0.074*	0.465 (11)
C10	0.0677 (7)	1.0625 (13)	0.3896 (5)	0.056 (3)	0.465 (11)
H10A	0.0886	1.1517	0.3566	0.067*	0.465 (11)
H10B	−0.0043	1.0731	0.3830	0.067*	0.465 (11)
C11	0.053 (3)	0.696 (4)	0.396 (2)	0.092 (10)	0.465 (11)
H11A	−0.0185	0.7058	0.3873	0.138*	0.465 (11)
H11B	0.0812	0.6838	0.4496	0.138*	0.465 (11)
H11C	0.0705	0.5903	0.3705	0.138*	0.465 (11)
C12	0.066 (3)	0.888 (6)	0.2842 (6)	0.071 (8)	0.465 (11)
H12A	−0.0053	0.9054	0.2678	0.107*	0.465 (11)
H12B	0.0849	0.7789	0.2611	0.107*	0.465 (11)
H12C	0.0998	0.9931	0.2700	0.107*	0.465 (11)
N3'	0.0939 (2)	0.8665 (4)	0.36804 (17)	0.0606 (8)	0.535 (11)
C8'	0.2202 (3)	1.1843 (5)	0.4750 (2)	0.0684 (11)	0.535 (11)
H8'A	0.2415	1.3124	0.4803	0.082*	0.535 (11)
H8'B	0.2252	1.1336	0.5250	0.082*	0.535 (11)
C9'	0.1099 (5)	1.1713 (11)	0.4277 (7)	0.077 (3)	0.535 (11)
H9'A	0.0703	1.2595	0.4484	0.093*	0.535 (11)
H9'B	0.1091	1.2112	0.3768	0.093*	0.535 (11)
C10'	0.0573 (6)	0.9862 (12)	0.4224 (6)	0.069 (3)	0.535 (11)
H10C	0.0711	0.9278	0.4717	0.082*	0.535 (11)
H10D	−0.0145	1.0035	0.4055	0.082*	0.535 (11)
C11'	0.036 (2)	0.703 (3)	0.3837 (17)	0.071 (5)	0.535 (11)
H11D	−0.0346	0.7331	0.3720	0.106*	0.535 (11)
H11E	0.0569	0.6702	0.4360	0.106*	0.535 (11)
H11F	0.0467	0.6009	0.3531	0.106*	0.535 (11)
C12'	0.052 (3)	0.896 (5)	0.2860 (6)	0.071 (7)	0.535 (11)
H12D	−0.0197	0.9133	0.2770	0.106*	0.535 (11)
H12E	0.0653	0.7900	0.2584	0.106*	0.535 (11)
H12F	0.0815	1.0035	0.2697	0.106*	0.535 (11)
C13	0.2546 (3)	0.6730 (5)	0.5551 (2)	0.0572 (9)
C14	0.2316 (2)	0.4674 (5)	0.29685 (19)	0.0481 (8)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cu1	0.0369 (2)	0.0457 (2)	0.0496 (2)	−0.00511 (18)	0.01183 (16)	−0.00953 (18)
N1	0.0412 (15)	0.0515 (17)	0.0463 (15)	−0.0058 (12)	0.0131 (12)	−0.0059 (12)
N2	0.0448 (16)	0.0426 (16)	0.0496 (15)	0.0014 (13)	0.0109 (12)	−0.0037 (12)
N4	0.066 (2)	0.057 (2)	0.0533 (18)	−0.0049 (15)	0.0097 (15)	0.0003 (15)
N5	0.0559 (19)	0.0598 (19)	0.072 (2)	−0.0085 (16)	0.0162 (16)	−0.0233 (17)
S1	0.264 (3)	0.178 (2)	0.1026 (12)	−0.0650 (18)	0.0974 (15)	0.0160 (12)
S2	0.0560 (6)	0.0568 (6)	0.0762 (6)	−0.0069 (4)	0.0269 (5)	−0.0187 (5)
C1	0.055 (2)	0.078 (3)	0.064 (2)	−0.011 (2)	0.0212 (19)	−0.025 (2)
C2	0.051 (2)	0.107 (4)	0.075 (3)	−0.005 (2)	0.031 (2)	−0.023 (2)
C3	0.042 (2)	0.106 (4)	0.071 (3)	−0.012 (2)	0.0205 (19)	0.002 (2)
C4	0.045 (2)	0.069 (3)	0.064 (2)	−0.0139 (19)	0.0068 (17)	0.003 (2)
C5	0.0366 (17)	0.0494 (19)	0.0435 (17)	−0.0030 (15)	0.0024 (13)	0.0060 (15)
C6	0.0428 (19)	0.0389 (18)	0.0486 (18)	−0.0020 (14)	0.0004 (14)	0.0025 (14)
C7	0.062 (2)	0.046 (2)	0.093 (3)	−0.0065 (19)	−0.001 (2)	−0.012 (2)
N3	0.0378 (16)	0.073 (2)	0.069 (2)	−0.0027 (15)	0.0079 (14)	−0.0122 (17)
C8	0.069 (3)	0.059 (2)	0.079 (3)	0.009 (2)	0.023 (2)	−0.021 (2)
C9	0.062 (6)	0.061 (7)	0.078 (7)	0.003 (5)	0.047 (5)	−0.009 (5)
C10	0.034 (5)	0.066 (7)	0.072 (6)	0.017 (4)	0.019 (4)	0.007 (5)
C11	0.019 (8)	0.155 (18)	0.096 (19)	−0.026 (9)	0.003 (9)	0.037 (10)
C12	0.032 (9)	0.105 (17)	0.065 (12)	−0.007 (8)	−0.012 (8)	0.027 (10)
N3'	0.0378 (16)	0.073 (2)	0.069 (2)	−0.0027 (15)	0.0079 (14)	−0.0122 (17)
C8'	0.069 (3)	0.059 (2)	0.079 (3)	0.009 (2)	0.023 (2)	−0.021 (2)
C9'	0.067 (6)	0.058 (6)	0.126 (10)	0.003 (4)	0.061 (7)	−0.008 (6)
C10'	0.058 (5)	0.074 (6)	0.083 (7)	0.005 (4)	0.034 (5)	0.001 (5)
C11'	0.038 (12)	0.120 (12)	0.053 (6)	−0.007 (6)	0.007 (8)	0.019 (6)
C12'	0.050 (13)	0.061 (10)	0.100 (15)	−0.006 (7)	0.013 (8)	0.010 (9)
C13	0.066 (2)	0.043 (2)	0.061 (2)	−0.0099 (18)	0.0108 (19)	0.0024 (18)
C14	0.0348 (17)	0.054 (2)	0.0550 (19)	−0.0070 (15)	0.0103 (14)	−0.0051 (17)

Geometric parameters (Å, º) top

Cu1—N5	1.955 (3)	N3—C11	1.494 (9)
Cu1—N2	2.013 (3)	N3—C10	1.537 (7)
Cu1—N1	2.047 (3)	C8—C9	1.483 (7)
Cu1—N3	2.078 (3)	C8—H8A	0.9700
Cu1—N4	2.153 (3)	C8—H8B	0.9700
N1—C1	1.331 (4)	C9—C10	1.525 (9)
N1—C5	1.343 (4)	C9—H9A	0.9700
N2—C6	1.264 (4)	C9—H9B	0.9700
N2—C8	1.472 (4)	C10—H10A	0.9700
N4—C13	1.126 (4)	C10—H10B	0.9700
N5—C14	1.151 (4)	C11—H11A	0.9600
S1—C13	1.600 (4)	C11—H11B	0.9600
S2—C14	1.622 (4)	C11—H11C	0.9600
C1—C2	1.375 (5)	C12—H12A	0.9600
C1—H1	0.9300	C12—H12B	0.9600
C2—C3	1.361 (6)	C12—H12C	0.9600
C2—H2	0.9300	C9'—C10'	1.514 (9)
C3—C4	1.373 (5)	C9'—H9'A	0.9700
C3—H3	0.9300	C9'—H9'B	0.9700
C4—C5	1.380 (5)	C10'—H10C	0.9700
C4—H4	0.9300	C10'—H10D	0.9700
C5—C6	1.486 (5)	C11'—H11D	0.9600
C6—C7	1.500 (4)	C11'—H11E	0.9600
C7—H7A	0.9600	C11'—H11F	0.9600
C7—H7B	0.9600	C12'—H12D	0.9600
C7—H7C	0.9600	C12'—H12E	0.9600
N3—C12	1.494 (9)	C12'—H12F	0.9600

N5—Cu1—N2	169.17 (12)	C11—N3—Cu1	105.6 (16)
N5—Cu1—N1	90.84 (12)	C10—N3—Cu1	111.3 (4)
N2—Cu1—N1	79.51 (11)	N2—C8—C9	115.7 (4)
N5—Cu1—N3	90.46 (12)	N2—C8—H8A	108.3
N2—Cu1—N3	95.82 (11)	C9—C8—H8A	108.3
N1—Cu1—N3	152.40 (12)	N2—C8—H8B	108.3
N5—Cu1—N4	96.85 (13)	C9—C8—H8B	108.3
N2—Cu1—N4	90.64 (11)	H8A—C8—H8B	107.4
N1—Cu1—N4	106.39 (12)	C8—C9—C10	109.8 (7)
N3—Cu1—N4	100.82 (12)	C8—C9—H9A	109.7
C1—N1—C5	117.9 (3)	C10—C9—H9A	109.7
C1—N1—Cu1	128.7 (3)	C8—C9—H9B	109.7
C5—N1—Cu1	113.4 (2)	C10—C9—H9B	109.7
C6—N2—C8	119.9 (3)	H9A—C9—H9B	108.2
C6—N2—Cu1	116.6 (2)	C9—C10—N3	110.5 (7)
C8—N2—Cu1	123.3 (2)	C9—C10—H10A	109.5
C13—N4—Cu1	152.2 (3)	N3—C10—H10A	109.5
C14—N5—Cu1	169.4 (3)	C9—C10—H10B	109.5
N1—C1—C2	123.3 (4)	N3—C10—H10B	109.5
N1—C1—H1	118.4	H10A—C10—H10B	108.1
C2—C1—H1	118.4	N3—C11—H11A	109.5
C3—C2—C1	118.6 (4)	N3—C11—H11B	109.5
C3—C2—H2	120.7	H11A—C11—H11B	109.5
C1—C2—H2	120.7	N3—C11—H11C	109.5
C2—C3—C4	119.2 (4)	H11A—C11—H11C	109.5
C2—C3—H3	120.4	H11B—C11—H11C	109.5
C4—C3—H3	120.4	N3—C12—H12A	109.5
C3—C4—C5	119.4 (4)	N3—C12—H12B	109.5
C3—C4—H4	120.3	H12A—C12—H12B	109.5
C5—C4—H4	120.3	N3—C12—H12C	109.5
N1—C5—C4	121.6 (3)	H12A—C12—H12C	109.5
N1—C5—C6	114.3 (3)	H12B—C12—H12C	109.5
C4—C5—C6	124.1 (3)	C10'—C9'—H9'A	107.7
N2—C6—C5	116.1 (3)	C10'—C9'—H9'B	107.7
N2—C6—C7	125.6 (3)	H9'A—C9'—H9'B	107.1
C5—C6—C7	118.3 (3)	C9'—C10'—H10C	109.9
C6—C7—H7A	109.5	C9'—C10'—H10D	109.9
C6—C7—H7B	109.5	H10C—C10'—H10D	108.3
H7A—C7—H7B	109.5	H11D—C11'—H11E	109.5
C6—C7—H7C	109.5	H11D—C11'—H11F	109.5
H7A—C7—H7C	109.5	H11E—C11'—H11F	109.5
H7B—C7—H7C	109.5	H12D—C12'—H12E	109.5
C12—N3—C11	114 (2)	H12D—C12'—H12F	109.5
C12—N3—C10	98.4 (18)	H12E—C12'—H12F	109.5
C11—N3—C10	122.9 (19)	N4—C13—S1	178.9 (4)
C12—N3—Cu1	102.7 (18)	N5—C14—S2	179.4 (3)

Experimental details

Crystal data
Chemical formula	[Cu(NCS)₂(C₁₂H₁₉N₃)]
M_r	385.00
Crystal system, space group	Monoclinic, P2₁/c
Temperature (K)	298
a, b, c (Å)	13.723 (2), 7.2380 (12), 18.237 (3)
β (°)	103.559 (2)
V (Å³)	1760.9 (5)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	1.48
Crystal size (mm)	0.23 × 0.21 × 0.21

Data collection
Diffractometer	Bruker SMART CCD diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996)
T_min, T_max	0.727, 0.746
No. of measured, independent and observed [I > 2σ(I)] reflections	13886, 3816, 2698
R_int	0.041
(sin θ/λ)_max (Å⁻¹)	0.639

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.042, 0.111, 1.04
No. of reflections	3816
No. of parameters	237
No. of restraints	16
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.57, −0.47

Computer programs: SMART (Bruker, 1998), SAINT (Bruker, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Selected bond lengths (Å) top

Cu1—N5	1.955 (3)	Cu1—N3	2.078 (3)
Cu1—N2	2.013 (3)	Cu1—N4	2.153 (3)
Cu1—N1	2.047 (3)

Acknowledgements

We thank the Top-Class Foundation and the Applied Chemistry Key Laboratory Foundation of Pingdingshan University.

References

Bruker (1998). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Xue, L.-W., Zhao, G.-Q., Han, Y.-J. & Feng, Y.-X. (2010). Acta Cryst. E66, m1172–m1173. Web of Science CSD CrossRef IUCr Journals Google Scholar

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.