catena-Poly[[bis­(nitrato-κO)cadmium]bis­[μ-1,4-bis­(pyridin-3-yl­meth­oxy)benzene-κ2N:N′]]

Zhang, S.; Yu, Y.-H.; Liu, Y.; Hou, G.-F.; Gao, J.-S.

doi:10.1107/S1600536811032697

metal-organic compounds

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ISSN: 2056-9890

Volume 67| Part 9| September 2011| Page m1263

doi:10.1107/S1600536811032697

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catena-Poly[[bis(nitrato-κO)cadmium]bis[μ-1,4-bis(pyridin-3-ylmethoxy)benzene-κ²N:N′]]

Shuang Zhang,^a Ying-Hui Yu,^a,^b Ying Liu,^b Guang-Feng Hou ^a,^b and Jin-Sheng Gao ^a,^b ^*

^aEngineering Research Center of Pesticides of Heilongjiang University, Heilongjiang University, Harbin 150050, People's Republic of China, and ^bCollege of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, People's Republic of China
^*Correspondence e-mail: hgf1000@163.com

(Received 28 July 2011; accepted 12 August 2011; online 17 August 2011)

In the title compound, [Cd(NO₃)₂(C₁₈H₁₆N₂O₂)₂]_n, the six-coordinated Cd^II ion is located on an inversion center and has a distorted octahedral environment defined by four N atoms from four 1,4-bis(pyridin-3-ylmethoxy)benzene ligands and two O atoms from two nitrate anions. The ligands link the Cd^II ions into a ribbon-like structure running along [201]. One O atom of the nitrate anion is disordered over two positions with site-occupancy factors of 0.59 (2) and 0.41 (2).

Related literature

For the synthesis and background to metal complexes with pyridyl-based aromatic ligands, see: Liu et al. (2010a ,b ). For isotypic compounds, see: Liu et al. (2011 ); Zou et al. (2011 ).

Experimental

Crystal data

[Cd(NO₃)₂(C₁₈H₁₆N₂O₂)₂]
M_r = 821.08
Monoclinic, P 2₁ /c
a = 8.4034 (17) Å
b = 16.914 (3) Å
c = 13.436 (5) Å
β = 114.23 (2)°
V = 1741.5 (8) Å³
Z = 2
Mo Kα radiation
μ = 0.70 mm⁻¹
T = 293 K
0.20 × 0.19 × 0.17 mm

Data collection

Rigaku R-AXIS RAPID diffractometer
Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ) T_min = 0.871, T_max = 0.890
16413 measured reflections
3952 independent reflections
3277 reflections with I > 2σ(I)
R_int = 0.028

Refinement

R[F² > 2σ(F²)] = 0.029
wR(F²) = 0.077
S = 1.08
3952 reflections
251 parameters
12 restraints
H-atom parameters constrained
Δρ_max = 0.45 e Å⁻³
Δρ_min = −0.30 e Å⁻³

Table 1
Selected bond lengths (Å)

Cd1—N1	2.3793 (17)
Cd1—N2ⁱ	2.3064 (17)
Cd1—O3	2.3778 (17)
Symmetry code: (i) x+2, y, z+1.

Data collection: RAPID-AUTO (Rigaku, 1998 ); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002 ); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999 ); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Supporting information

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811032697/hy2453sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536811032697/hy2453Isup2.hkl

checkCIF report

Comment top

The bridging compounds with rigid and flexible pyridyl-containing bidentate or multidentate organic spacers have assembled numerous interesting topology structures by coordination with metals and intermolecular supramolecular interactions. Our group focused attention on study of flexible pyridyl-based aromatic ligands, and obtained some isolated molecules, chain, two- and three-dimensional network structures (Liu et al., 2010a, b). Herein, as a continuing work for pyridyl ligands, we report the synthesis and crystal structure of the title compound, which is a isostructural compound of our previous reports (Liu et al., 2011; Zou et al., 2011).

In the title compound, the Cd^II ion lies on an inversion center and is six-coordinated in a distorted octahedral geometry defined by four N atoms of the pyridine derivatives and two O atoms of the nitrate anions (Fig. 1, Table 1). One O atom of the nitrate anion has a badly thermal ellipsoid, which is split over two positions with site-occupancy factors of 0.59 (2) and 0.41 (2). In the crystal, ribbon-like structures along [2 0 1] are built up by the N-heterocyclic ligands linking the Cd^II ions (Fig. 2).

Related literature top

For the synthesis and background to metal complexes with pyridyl-based aromatic ligands, see: Liu et al. (2010a,b). For isotypic compounds, see: Liu et al. (2011); Zou et al. (2011).

Experimental top

The 1,4-bis(pyridin-3-ylmethoxy)benzene ligand was synthesized as the reference method (Liu et al., 2010a). A mixture of 1,4-dihydroxybenzene (1.10 g, 10 mmol), 3-chloromethylpyridine hydrochloride (3.28 g, 20 mmol) and NaOH (1.60 g, 40 mmol) in acetonitrile (50 ml) was refluxed under nitrogen with stirring for 24 h. After cooling to room temperature, the solution was filtered and the residue was washed with acetonitrile for several times. The mixed filtrate was dropped into a 300 ml water solution, giving a powder crude product. A total of 2.51 g (yield 86%) pure product was obtained by recrystallizing from a mixed solution of 10 ml water and 10 ml methanol. The title compound was synthesized by the reaction of 1,4-bis(pyridin-3-ylmethoxy)benzene (0.29 g, 1.0 mmol) and Cd(NO₃)₂.4H₂O (0.31 g, 1.0 mmol) in a mixed solution of 5 ml water and 5 ml methanol. The mixture was filtered after stirring for about 1 h. The filtate was allowed to stand for 4 d under room temperature to give block-like colorless crystals suitable for X-ray analysis.

Computing details top

Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO (Rigaku, 1998); data reduction: CrystalStructure (Rigaku/MSC, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top

	Fig. 1. The structure of the title compound, showing displacement ellipsoids at the 50% probability level. H atoms and disordered O5' atom have been omitted for clarity. [Symmetry codes: (i) -2+x, y, -1+z; (ii) -x, 1-y, -z; (iii) 2-x, 1-y, 1-z; (iv) 2+x, y, 1+z.]
	Fig. 2. A packing view of the title compound, showing the ribbon-like structure along [2 0 1].

catena-Poly[[bis(nitrato-κO)cadmium]bis[µ-1,4- bis(pyridin-3-ylmethoxy)benzene-κ²N:N']] top

Crystal data top

[Cd(NO₃)₂(C₁₈H₁₆N₂O₂)₂]	F(000) = 836
M_r = 821.08	D_x = 1.566 Mg m⁻³
Monoclinic, P2₁/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 14136 reflections
a = 8.4034 (17) Å	θ = 3.3–27.5°
b = 16.914 (3) Å	µ = 0.70 mm⁻¹
c = 13.436 (5) Å	T = 293 K
β = 114.23 (2)°	Block, colorless
V = 1741.5 (8) Å³	0.20 × 0.19 × 0.17 mm
Z = 2

Data collection top

Rigaku R-AXIS RAPID diffractometer	3952 independent reflections
Radiation source: rotation anode	3277 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.028
ω scan	θ_max = 27.5°, θ_min = 3.3°
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	h = −8→10
T_min = 0.871, T_max = 0.890	k = −21→21
16413 measured reflections	l = −17→17

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)] = 0.029	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.077	H-atom parameters constrained
S = 1.08	w = 1/[σ²(F_o²) + (0.0425P)² + 0.3288P] where P = (F_o² + 2F_c²)/3
3952 reflections	(Δ/σ)_max = 0.001
251 parameters	Δρ_max = 0.45 e Å⁻³
12 restraints	Δρ_min = −0.30 e Å⁻³

Crystal data top

[Cd(NO₃)₂(C₁₈H₁₆N₂O₂)₂]	V = 1741.5 (8) Å³
M_r = 821.08	Z = 2
Monoclinic, P2₁/c	Mo Kα radiation
a = 8.4034 (17) Å	µ = 0.70 mm⁻¹
b = 16.914 (3) Å	T = 293 K
c = 13.436 (5) Å	0.20 × 0.19 × 0.17 mm
β = 114.23 (2)°

Data collection top

Rigaku R-AXIS RAPID diffractometer	3952 independent reflections
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	3277 reflections with I > 2σ(I)
T_min = 0.871, T_max = 0.890	R_int = 0.028
16413 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.029	12 restraints
wR(F²) = 0.077	H-atom parameters constrained
S = 1.08	Δρ_max = 0.45 e Å⁻³
3952 reflections	Δρ_min = −0.30 e Å⁻³
251 parameters

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

	x	y	z	U_iso*/U_eq	Occ. (<1)
Cd1	1.0000	0.5000	0.5000	0.04071 (9)
O1	0.18190 (19)	0.65049 (9)	0.17002 (17)	0.0667 (5)
O2	−0.52415 (19)	0.61347 (9)	−0.08007 (16)	0.0643 (5)
O3	1.2330 (2)	0.56597 (9)	0.47758 (15)	0.0567 (4)
O4	1.2207 (3)	0.68782 (11)	0.51540 (19)	0.0791 (6)
O5	1.4627 (9)	0.6264 (6)	0.5848 (14)	0.079 (3)	0.41 (2)
O5'	1.4608 (7)	0.6401 (4)	0.5304 (12)	0.087 (2)	0.59 (2)
N1	0.7748 (2)	0.58067 (10)	0.37477 (14)	0.0411 (4)
N2	−0.9888 (2)	0.57398 (9)	−0.35307 (13)	0.0370 (3)
N3	1.3053 (2)	0.62879 (10)	0.51369 (16)	0.0463 (4)
C1	0.8208 (3)	0.63692 (13)	0.32227 (18)	0.0446 (5)
H1	0.9391	0.6463	0.3424	0.054*
C2	0.7023 (3)	0.68165 (14)	0.23999 (18)	0.0469 (5)
H2	0.7401	0.7213	0.2069	0.056*
C3	0.5261 (3)	0.66720 (12)	0.20688 (17)	0.0429 (5)
H3	0.4436	0.6966	0.1509	0.052*
C4	0.4750 (2)	0.60814 (12)	0.25868 (17)	0.0388 (4)
C5	0.6032 (2)	0.56757 (12)	0.34290 (17)	0.0418 (4)
H5	0.5687	0.5291	0.3795	0.050*
C6	0.2865 (3)	0.58475 (13)	0.2223 (2)	0.0509 (6)
H6A	0.2595	0.5404	0.1722	0.061*
H6B	0.2640	0.5691	0.2848	0.061*
C7	0.0068 (2)	0.63792 (12)	0.10806 (19)	0.0442 (5)
C8	−0.0774 (3)	0.56579 (13)	0.0975 (2)	0.0517 (6)
H8	−0.0150	0.5214	0.1336	0.062*
C9	−0.2549 (3)	0.56010 (13)	0.0329 (2)	0.0507 (6)
H9	−0.3113	0.5117	0.0251	0.061*
C10	−0.3483 (2)	0.62632 (12)	−0.01978 (18)	0.0433 (5)
C11	−0.2652 (2)	0.69830 (11)	−0.00903 (17)	0.0402 (4)
H11	−0.3282	0.7428	−0.0441	0.048*
C12	−0.0864 (2)	0.70393 (12)	0.05461 (18)	0.0415 (4)
H12	−0.0297	0.7521	0.0612	0.050*
C13	−0.6311 (3)	0.67955 (12)	−0.12538 (19)	0.0476 (5)
H13A	−0.5876	0.7096	−0.1704	0.057*
H13B	−0.6339	0.7137	−0.0681	0.057*
C14	−0.8113 (2)	0.64770 (11)	−0.19354 (16)	0.0376 (4)
C15	−0.9549 (3)	0.66096 (13)	−0.17100 (19)	0.0472 (5)
H15	−0.9444	0.6897	−0.1096	0.057*
C16	−1.1153 (3)	0.63084 (13)	−0.2412 (2)	0.0484 (5)
H16	−1.2136	0.6390	−0.2272	0.058*
C17	−1.1282 (2)	0.58893 (11)	−0.33157 (18)	0.0409 (4)
H17	−1.2369	0.5703	−0.3794	0.049*
C18	−0.8348 (2)	0.60285 (12)	−0.28455 (16)	0.0385 (4)
H18	−0.7377	0.5922	−0.2989	0.046*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cd1	0.02736 (11)	0.04911 (14)	0.03548 (12)	0.00624 (8)	0.00257 (8)	−0.00838 (8)
O1	0.0250 (7)	0.0479 (8)	0.1035 (15)	0.0012 (6)	0.0023 (8)	0.0162 (9)
O2	0.0304 (8)	0.0442 (8)	0.0853 (13)	−0.0014 (6)	−0.0098 (8)	0.0059 (8)
O3	0.0497 (9)	0.0542 (9)	0.0639 (11)	−0.0053 (7)	0.0210 (8)	−0.0034 (8)
O4	0.0698 (12)	0.0553 (10)	0.1048 (17)	0.0078 (9)	0.0284 (12)	−0.0021 (10)
O5	0.036 (3)	0.091 (4)	0.090 (5)	−0.005 (2)	0.005 (3)	−0.006 (3)
O5'	0.0406 (19)	0.095 (3)	0.120 (5)	−0.0096 (17)	0.029 (3)	0.005 (3)
N1	0.0270 (8)	0.0488 (9)	0.0400 (9)	0.0048 (7)	0.0061 (7)	−0.0008 (7)
N2	0.0265 (7)	0.0418 (8)	0.0360 (9)	0.0024 (6)	0.0060 (6)	−0.0032 (7)
N3	0.0334 (9)	0.0447 (10)	0.0595 (12)	0.0035 (8)	0.0179 (8)	0.0089 (8)
C1	0.0283 (9)	0.0557 (12)	0.0463 (12)	−0.0028 (9)	0.0117 (9)	−0.0069 (9)
C2	0.0390 (11)	0.0551 (12)	0.0461 (12)	−0.0068 (9)	0.0170 (9)	0.0028 (9)
C3	0.0364 (10)	0.0489 (11)	0.0354 (10)	0.0022 (9)	0.0065 (8)	0.0043 (8)
C4	0.0269 (9)	0.0439 (10)	0.0389 (11)	0.0026 (8)	0.0066 (8)	0.0017 (8)
C5	0.0280 (9)	0.0469 (11)	0.0442 (11)	0.0037 (8)	0.0083 (8)	0.0063 (9)
C6	0.0262 (9)	0.0529 (12)	0.0623 (15)	0.0023 (9)	0.0066 (9)	0.0142 (10)
C7	0.0232 (9)	0.0484 (11)	0.0541 (13)	0.0008 (8)	0.0087 (9)	0.0058 (9)
C8	0.0315 (10)	0.0429 (11)	0.0677 (15)	0.0043 (9)	0.0071 (10)	0.0130 (10)
C9	0.0322 (10)	0.0402 (10)	0.0659 (15)	−0.0028 (8)	0.0061 (10)	0.0039 (10)
C10	0.0274 (9)	0.0447 (11)	0.0460 (12)	0.0002 (8)	0.0031 (8)	−0.0001 (8)
C11	0.0315 (9)	0.0398 (10)	0.0415 (11)	0.0046 (8)	0.0072 (8)	0.0059 (8)
C12	0.0301 (9)	0.0402 (10)	0.0493 (12)	−0.0015 (8)	0.0115 (9)	0.0046 (8)
C13	0.0339 (10)	0.0446 (11)	0.0478 (12)	0.0030 (9)	0.0000 (9)	−0.0073 (9)
C14	0.0300 (9)	0.0370 (9)	0.0362 (10)	0.0034 (7)	0.0038 (8)	−0.0026 (7)
C15	0.0460 (12)	0.0458 (11)	0.0478 (12)	0.0039 (9)	0.0172 (10)	−0.0121 (9)
C16	0.0339 (10)	0.0489 (11)	0.0660 (15)	0.0039 (9)	0.0241 (10)	−0.0066 (10)
C17	0.0252 (9)	0.0385 (10)	0.0518 (12)	0.0006 (7)	0.0085 (8)	−0.0002 (8)
C18	0.0260 (9)	0.0474 (10)	0.0372 (10)	0.0017 (8)	0.0079 (8)	−0.0048 (8)

Geometric parameters (Å, º) top

Cd1—N1	2.3793 (17)	C5—H5	0.9300
Cd1—N2ⁱ	2.3064 (17)	C6—H6A	0.9700
Cd1—O3	2.3778 (17)	C6—H6B	0.9700
O1—C7	1.378 (2)	C7—C12	1.383 (3)
O1—C6	1.413 (3)	C7—C8	1.388 (3)
O2—C10	1.380 (2)	C8—C9	1.388 (3)
O2—C13	1.407 (2)	C8—H8	0.9300
O3—N3	1.221 (2)	C9—C10	1.384 (3)
O4—N3	1.231 (3)	C9—H9	0.9300
O5—O5'	0.761 (9)	C10—C11	1.382 (3)
O5—N3	1.275 (7)	C11—C12	1.394 (3)
O5'—N3	1.246 (5)	C11—H11	0.9300
N1—C1	1.333 (3)	C12—H12	0.9300
N1—C5	1.344 (2)	C13—C14	1.511 (3)
N2—C18	1.335 (2)	C13—H13A	0.9700
N2—C17	1.341 (3)	C13—H13B	0.9700
C1—C2	1.372 (3)	C14—C15	1.378 (3)
C1—H1	0.9300	C14—C18	1.383 (3)
C2—C3	1.381 (3)	C15—C16	1.387 (3)
C2—H2	0.9300	C15—H15	0.9300
C3—C4	1.383 (3)	C16—C17	1.371 (3)
C3—H3	0.9300	C16—H16	0.9300
C4—C5	1.382 (3)	C17—H17	0.9300
C4—C6	1.506 (3)	C18—H18	0.9300

N2ⁱⁱ—Cd1—N2ⁱ	180.000 (1)	O1—C6—H6A	110.1
N2ⁱⁱ—Cd1—O3ⁱⁱⁱ	96.17 (6)	C4—C6—H6A	110.1
N2ⁱ—Cd1—O3ⁱⁱⁱ	83.83 (6)	O1—C6—H6B	110.1
N2ⁱⁱ—Cd1—O3	83.83 (6)	C4—C6—H6B	110.1
N2ⁱ—Cd1—O3	96.17 (6)	H6A—C6—H6B	108.4
O3ⁱⁱⁱ—Cd1—O3	180.00 (7)	O1—C7—C12	115.21 (18)
N2ⁱⁱ—Cd1—N1	87.97 (6)	O1—C7—C8	124.79 (18)
N2ⁱ—Cd1—N1	92.03 (6)	C12—C7—C8	120.00 (18)
O3ⁱⁱⁱ—Cd1—N1	84.33 (6)	C9—C8—C7	119.80 (19)
O3—Cd1—N1	95.67 (6)	C9—C8—H8	120.1
N2ⁱⁱ—Cd1—N1ⁱⁱⁱ	92.03 (6)	C7—C8—H8	120.1
N2ⁱ—Cd1—N1ⁱⁱⁱ	87.97 (6)	C10—C9—C8	120.14 (19)
O3ⁱⁱⁱ—Cd1—N1ⁱⁱⁱ	95.67 (6)	C10—C9—H9	119.9
O3—Cd1—N1ⁱⁱⁱ	84.33 (6)	C8—C9—H9	119.9
N1—Cd1—N1ⁱⁱⁱ	180.0	O2—C10—C11	125.03 (18)
C7—O1—C6	118.12 (16)	O2—C10—C9	114.74 (18)
C10—O2—C13	117.98 (16)	C11—C10—C9	120.22 (18)
N3—O3—Cd1	131.24 (14)	C10—C11—C12	119.73 (18)
C1—N1—C5	117.12 (17)	C10—C11—H11	120.1
C1—N1—Cd1	117.65 (13)	C12—C11—H11	120.1
C5—N1—Cd1	124.68 (14)	C7—C12—C11	120.10 (18)
C18—N2—C17	117.90 (17)	C7—C12—H12	120.0
C18—N2—Cd1^iv	118.42 (13)	C11—C12—H12	120.0
C17—N2—Cd1^iv	123.67 (13)	O2—C13—C14	106.41 (16)
O3—N3—O4	121.06 (19)	O2—C13—H13A	110.4
O3—N3—O5'	121.2 (3)	C14—C13—H13A	110.4
O4—N3—O5'	116.3 (3)	O2—C13—H13B	110.4
O3—N3—O5	117.6 (5)	C14—C13—H13B	110.4
O4—N3—O5	116.2 (4)	H13A—C13—H13B	108.6
N1—C1—C2	123.18 (19)	C15—C14—C18	117.61 (18)
N1—C1—H1	118.4	C15—C14—C13	123.97 (19)
C2—C1—H1	118.4	C18—C14—C13	118.41 (19)
C1—C2—C3	119.3 (2)	C14—C15—C16	119.0 (2)
C1—C2—H2	120.3	C14—C15—H15	120.5
C3—C2—H2	120.3	C16—C15—H15	120.5
C2—C3—C4	118.61 (19)	C17—C16—C15	119.6 (2)
C2—C3—H3	120.7	C17—C16—H16	120.2
C4—C3—H3	120.7	C15—C16—H16	120.2
C5—C4—C3	118.17 (18)	N2—C17—C16	121.99 (18)
C5—C4—C6	119.84 (19)	N2—C17—H17	119.0
C3—C4—C6	121.92 (18)	C16—C17—H17	119.0
N1—C5—C4	123.56 (19)	N2—C18—C14	123.82 (18)
N1—C5—H5	118.2	N2—C18—H18	118.1
C4—C5—H5	118.2	C14—C18—H18	118.1
O1—C6—C4	108.15 (17)

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

Experimental details

Crystal data
Chemical formula	[Cd(NO₃)₂(C₁₈H₁₆N₂O₂)₂]
M_r	821.08
Crystal system, space group	Monoclinic, P2₁/c
Temperature (K)	293
a, b, c (Å)	8.4034 (17), 16.914 (3), 13.436 (5)
β (°)	114.23 (2)
V (Å³)	1741.5 (8)
Z	2
Radiation type	Mo Kα
µ (mm⁻¹)	0.70
Crystal size (mm)	0.20 × 0.19 × 0.17

Data collection
Diffractometer	Rigaku R-AXIS RAPID diffractometer
Absorption correction	Multi-scan (ABSCOR; Higashi, 1995)
T_min, T_max	0.871, 0.890
No. of measured, independent and observed [I > 2σ(I)] reflections	16413, 3952, 3277
R_int	0.028
(sin θ/λ)_max (Å⁻¹)	0.649

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.029, 0.077, 1.08
No. of reflections	3952
No. of parameters	251
No. of restraints	12
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.45, −0.30

Computer programs: RAPID-AUTO (Rigaku, 1998), CrystalStructure (Rigaku/MSC, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), DIAMOND (Brandenburg, 1999), SHELXTL (Sheldrick, 2008).

Selected bond lengths (Å) top

Cd1—N1	2.3793 (17)	Cd1—O3	2.3778 (17)
Cd1—N2ⁱ	2.3064 (17)

Symmetry code: (i) x+2, y, z+1.

Acknowledgements

The authors thank the Project of Innovation Service Platform of Heilongjiang Province (PG09J001) and Heilongjiang University for supporting this work.

References

Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan. Google Scholar
Liu, Y., Yan, P.-F., Yu, Y.-H., Hou, G.-F. & Gao, J.-S. (2010a). Cryst. Growth Des. 10, 1559–1568. Web of Science CSD CrossRef CAS Google Scholar
Liu, Y., Yan, P.-F., Yu, Y.-H., Hou, G.-F. & Gao, J.-S. (2010b). Inorg. Chem. Commun. 13, 630–632. Web of Science CSD CrossRef CAS Google Scholar
Liu, Y., Zhang, H.-S., Hou, G.-F. & Gao, J.-S. (2011). Acta Cryst. E67, m789. Web of Science CSD CrossRef IUCr Journals Google Scholar
Rigaku (1998). RAPID-AUTO. Rigaku Corporation, Tokyo, Japan. Google Scholar
Rigaku/MSC (2002). CrystalStructure. Rigaku/MSC Inc., The Woodlands, Texas, USA. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Zou, P., Liu, Y., Hou, G.-F. & Gao, J.-S. (2011). Acta Cryst. E67, m692. Web of Science CSD CrossRef IUCr Journals Google Scholar

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