Poly[diaqua­bis(μ2-azido-κ2N1:N1)bis­(μ3-1-oxoisonicotinato-κ3O:O′:O′′)dicadmium(II)]

Wang, Z.-X.; Li, X.-B.; Sun, B.-W.

doi:10.1107/S1600536808013196

metal-organic compounds

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ISSN: 2056-9890

Volume 64| Part 6| June 2008| Pages m792-m793

doi:10.1107/S1600536808013196

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Poly[diaquabis(μ²-azido-κ²N¹:N¹)bis(μ₃-1-oxoisonicotinato-κ³O:O′:O′′)dicadmium(II)]

Zhi-Xiang Wang,^a ^* Xiu-Bing Li ^b and Bai-Wang Sun ^a

^aOrdered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, People's Republic of China, and ^bDepartment of Chemistry, Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan University, Kunming 650091, People's Republic of China
^*Correspondence e-mail: chmsunbw@seu.edu.cn

(Received 2 March 2008; accepted 5 May 2008; online 10 May 2008)

In the title compound, [Cd₂(C₆H₄NO₃)₂(N₃)₂(H₂O)₂]_n, one Cd^II atom is located on an inversion center and is coordinated by four O atoms from four bridging 1-oxoisonicotinate ligands and two N atoms of two bridging azide ligands in a slightly distorted octahedral geometry. The other Cd^II atom, also lying on an inversion center, is coordinated by four O atoms from two bridging 1-oxoisonicotinate ligands and two water molecules and two N atoms of two bridging azide ligands in a slightly distorted octahedral geometry. The Cd atoms are connected via the 1-oxoisonicotinate and azide ligands into a two-dimensional coordination network. The crystal structure involves O—H⋯N and O—H⋯O hydrogen bonds.

Related literature

For general background, see: Du et al. (2006 ); Dybtsev et al. (2004 ). For related structures, see: Bai et al. (2004 ); He et al. (2005 ); Zhao et al. (2007 ).

Experimental

Crystal data

[Cd₂(C₆H₄NO₃)₂(N₃)₂(H₂O)₂]
M_r = 621.10
Triclinic, $[P \overline 1]$
a = 6.5409 (17) Å
b = 7.850 (2) Å
c = 9.410 (3) Å
α = 99.668 (6)°
β = 97.164 (6)°
γ = 107.566 (5)°
V = 446.1 (2) Å³
Z = 1
Mo Kα radiation
μ = 2.45 mm⁻¹
T = 223 (2) K
0.3 × 0.2 × 0.2 mm

Data collection

Rigaku Scxmini 1K CCD area-detector diffractometer
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005 ) T_min = 0.612, T_max = 0.613
5082 measured reflections
1567 independent reflections
1438 reflections with I > 2σ(I)
R_int = 0.022

Refinement

R[F² > 2σ(F²)] = 0.033
wR(F²) = 0.087
S = 1.08
1567 reflections
139 parameters
1 restraint
H-atom parameters constrained
Δρ_max = 0.60 e Å⁻³
Δρ_min = −1.02 e Å⁻³

Table 1
Selected geometric parameters (Å, °)

Cd1—N1	2.259 (3)
Cd1—O1	2.289 (3)
Cd1—O3ⁱ	2.370 (3)
Cd2—O2	2.242 (3)
Cd2—N1ⁱⁱ	2.284 (3)
Cd2—O4	2.363 (3)

N1—Cd1—O1	85.90 (12)
N1ⁱⁱⁱ—Cd1—O1	94.10 (12)
N1—Cd1—O3ⁱ	90.18 (12)
O1—Cd1—O3ⁱ	89.01 (11)
N1—Cd1—O3^iv	89.82 (12)
O2—Cd2—N1ⁱⁱ	85.06 (12)
O2—Cd2—O4^v	87.87 (12)
O2^v—Cd2—O4^v	92.13 (12)
N1ⁱⁱ—Cd2—O4^v	94.08 (12)
N1ⁱⁱⁱ—Cd2—O4^v	85.92 (12)
Symmetry codes: (i) -x, -y+1, -z+2; (ii) x, y-1, z; (iii) -x, -y+1, -z+1; (iv) x, y, z-1; (v) -x, -y, -z+1.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4C⋯N3^vi	0.90	2.36	3.239 (7)	167
O4—H4B⋯O3^vii	0.83	2.05	2.716 (4)	137
Symmetry codes: (vi) -x+1, -y+1, -z+1; (vii) -x+1, -y+1, -z+2.

Data collection: CrystalClear (Rigaku, 2005); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: Mercury (Macrae et al., 2006 ) and SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.

Supporting information

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536808013196/hy2123sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536808013196/hy2123Isup2.hkl

checkCIF report

Comment top

There is currently considerable interest in the synthesis and characterization of metal–organic frameworks because of their potential applications in molecular adsorption and separation processes, gas storage, ion exchange, catalysis, sensor technology and electronics (Du et al., 2006; Dybtsev et al., 2004). The isonicotinic acid N-oxide ligand possesses a longer bridging spacer and richer coordination modes to form a fascinating structure (He et al., 2005; Zhao et al., 2007). It is well known that azide anion is an excellent bridging ligand (Bai et al., 2004). Therefore, we expect to obtain higher dimensional structures based on isonicotinic acid N-oxide and azide ligands and transition metal ions through the control of their molar ratios. We report here the synthesis and crystal structure of the title compound.

In the title compound, the Cd1 atom is located on an inversion center and is coordinated by four O atoms from four bridging isonicotinate-N-oxide ligands and two N atoms of two bridging azide ligands in a slightly distorted octahedral geometry. The Cd2 atom, also lying on an inversion center, is coordinated by four O atoms from two bridging isonicotinate-N-oxide ligands and two water molecules and two N atoms of two azide ligands in a slightly distorted octahedral geometry (Fig. 1; Table 1). The Cd atoms are connected via the isonicotinate-N-oxide and azide ligands into a two-dimensional coordination network. Furthermore, a three-dimensional supramolecular network is formed by the intermolecular O—H···N and O—H···O hydrogen bonds (Fig. 2; Table 2).

Related literature top

For general background, see: Du et al. (2006); Dybtsev et al. (2004). For related structures, see: Bai et al. (2004); He et al. (2005); Zhao et al. (2007).

Experimental top

All reagents and solvents were used as obtained without further purification. Cd(NO₃)₂.4H₂O (0.062 g, 0.2 mmol), isonicotinic acid N-oxide (0.028 g, 0.2 mmol), NaN₃ (0.013 g, 0.2 mmol) and NaOH (0.016 g, 0.4 mmol) were dissolved in distilled water (10 ml). The mixture was sealed in a Teflon-lined stainless steel vessel and held at 443 K for one week. The vessel was gradually cooled to room temperature and colorless crystals suitable for crystallographic analysis were obtained.

Computing details top

Data collection: CrystalClear (Rigaku, 2005); cell refinement: CrystalClear (Rigaku, 2005); data reduction: CrystalClear (Rigaku, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: Mercury (Macrae et al., 2006) and SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top

	Fig. 1. The asymmetric unit of the title compound, together with symmetry-related atoms to complete the coordination units. Displacement ellipsoids are drawn at the 30% probability level. H atoms have been omitted for clarity. [Symmetry codes: (i) -x, -y + 1, -z + 1; (ii) -x, -y, 1 - z; (iii) -x, 1 - y, 2 - z; (iv) x, y, -1 + z; (v) x, 1 + y, z; (vi) x, -1 + y, z.]
	Fig. 2. Crystal packing of the title compound. Hydrogen bonds are shown as dashed lines.

Poly[diaquabis(µ₂-azido-κ²N¹:N¹)bis(µ₃-1- oxoisonicotinato-κ³O:O':O'')dicadmium(II)] top

Crystal data top

[Cd₂(C₆H₄NO₃)₂(N₃)₂(H₂O)₂]	Z = 1
M_r = 621.10	F(000) = 300
Triclinic, P1	D_x = 2.312 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 6.5409 (17) Å	Cell parameters from 2159 reflections
b = 7.850 (2) Å	θ = 3.1–26.8°
c = 9.410 (3) Å	µ = 2.45 mm⁻¹
α = 99.668 (6)°	T = 223 K
β = 97.164 (6)°	Block, colorless
γ = 107.566 (5)°	0.3 × 0.2 × 0.2 mm
V = 446.1 (2) Å³

Data collection top

Rigaku Scxmini 1K CCD area-detector diffractometer	1567 independent reflections
Radiation source: fine-focus sealed tube	1438 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.022
Detector resolution: 8.192 pixels mm^-1	θ_max = 25.0°, θ_min = 2.8°
thin–slice ω scans	h = −7→7
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005)	k = −9→7
T_min = 0.612, T_max = 0.613	l = −11→10
5082 measured reflections

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)] = 0.033	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.087	H-atom parameters constrained
S = 1.08	w = 1/[σ²(F_o²) + (0.05P)² + 1.3747P] where P = (F_o² + 2F_c²)/3
1567 reflections	(Δ/σ)_max < 0.001
139 parameters	Δρ_max = 0.60 e Å⁻³
1 restraint	Δρ_min = −1.02 e Å⁻³

Crystal data top

[Cd₂(C₆H₄NO₃)₂(N₃)₂(H₂O)₂]	γ = 107.566 (5)°
M_r = 621.10	V = 446.1 (2) Å³
Triclinic, P1	Z = 1
a = 6.5409 (17) Å	Mo Kα radiation
b = 7.850 (2) Å	µ = 2.45 mm⁻¹
c = 9.410 (3) Å	T = 223 K
α = 99.668 (6)°	0.3 × 0.2 × 0.2 mm
β = 97.164 (6)°

Data collection top

Rigaku Scxmini 1K CCD area-detector diffractometer	1567 independent reflections
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005)	1438 reflections with I > 2σ(I)
T_min = 0.612, T_max = 0.613	R_int = 0.022
5082 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.033	1 restraint
wR(F²) = 0.087	H-atom parameters constrained
S = 1.08	Δρ_max = 0.60 e Å⁻³
1567 reflections	Δρ_min = −1.02 e Å⁻³
139 parameters

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

	x	y	z	U_iso*/U_eq
Cd1	0.0000	0.5000	0.5000	0.01556 (17)
Cd2	0.0000	0.0000	0.5000	0.01683 (17)
O1	0.1884 (5)	0.4600 (4)	0.7066 (3)	0.0244 (7)
O2	0.0598 (6)	0.1674 (4)	0.7283 (3)	0.0311 (8)
O3	0.3130 (5)	0.5495 (5)	1.3892 (3)	0.0270 (7)
O4	0.3676 (5)	0.1301 (5)	0.4778 (4)	0.0295 (8)
H4B	0.4361	0.2055	0.5546	0.035*
H4C	0.4127	0.0951	0.3945	0.035*
N1	0.1164 (6)	0.7997 (5)	0.6110 (4)	0.0201 (8)
N2	0.2664 (6)	0.8640 (5)	0.7131 (4)	0.0227 (8)
N3	0.4108 (8)	0.9283 (6)	0.8078 (6)	0.0506 (14)
N4	0.2847 (6)	0.5005 (5)	1.2437 (4)	0.0208 (8)
C1	0.3105 (6)	0.6288 (6)	1.1625 (5)	0.0213 (9)
H1A	0.3534	0.7529	1.2095	0.026*
C2	0.2752 (6)	0.5808 (6)	1.0126 (5)	0.0171 (8)
H2A	0.2954	0.6714	0.9569	0.021*
C3	0.2086 (6)	0.3959 (6)	0.9430 (4)	0.0168 (8)
C4	0.1925 (7)	0.2671 (6)	1.0312 (5)	0.0216 (9)
H4A	0.1547	0.1423	0.9873	0.026*
C5	0.2314 (7)	0.3216 (6)	1.1804 (5)	0.0240 (9)
H5A	0.2211	0.2345	1.2391	0.029*
C6	0.1483 (7)	0.3368 (6)	0.7782 (5)	0.0189 (9)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cd1	0.0215 (3)	0.0136 (2)	0.0112 (2)	0.00553 (18)	0.00313 (17)	0.00218 (17)
Cd2	0.0216 (3)	0.0152 (3)	0.0132 (3)	0.00717 (18)	0.00221 (17)	0.00086 (17)
O1	0.0288 (16)	0.0273 (17)	0.0148 (15)	0.0069 (14)	0.0003 (12)	0.0050 (13)
O2	0.049 (2)	0.0251 (18)	0.0161 (15)	0.0136 (16)	0.0021 (14)	−0.0019 (13)
O3	0.0253 (16)	0.0362 (19)	0.0095 (15)	−0.0004 (14)	0.0045 (12)	−0.0036 (13)
O4	0.0259 (17)	0.0337 (19)	0.0214 (17)	0.0014 (15)	0.0050 (14)	0.0010 (14)
N1	0.028 (2)	0.0120 (16)	0.0175 (18)	0.0069 (15)	−0.0020 (16)	0.0005 (14)
N2	0.027 (2)	0.0149 (17)	0.027 (2)	0.0079 (16)	0.0011 (19)	0.0071 (16)
N3	0.054 (3)	0.024 (2)	0.055 (3)	0.004 (2)	−0.029 (3)	0.003 (2)
N4	0.0178 (17)	0.028 (2)	0.0146 (17)	0.0054 (15)	0.0059 (14)	0.0020 (15)
C1	0.0146 (19)	0.024 (2)	0.022 (2)	0.0038 (17)	0.0020 (17)	0.0015 (18)
C2	0.0159 (19)	0.020 (2)	0.018 (2)	0.0079 (16)	0.0050 (16)	0.0061 (16)
C3	0.0133 (18)	0.020 (2)	0.017 (2)	0.0061 (16)	0.0044 (16)	0.0029 (16)
C4	0.030 (2)	0.017 (2)	0.020 (2)	0.0099 (18)	0.0079 (18)	0.0047 (17)
C5	0.025 (2)	0.028 (2)	0.017 (2)	0.0057 (19)	0.0076 (18)	0.0046 (18)
C6	0.017 (2)	0.027 (2)	0.016 (2)	0.0120 (18)	0.0034 (16)	0.0047 (18)

Geometric parameters (Å, º) top

Cd1—N1	2.259 (3)	O4—H4B	0.8300
Cd1—N1ⁱ	2.259 (3)	O4—H4C	0.9000
Cd1—O1	2.289 (3)	N1—N2	1.201 (5)
Cd1—O1ⁱ	2.289 (3)	N1—Cd2^vii	2.284 (3)
Cd1—O3ⁱⁱ	2.370 (3)	N2—N3	1.137 (6)
Cd1—O3ⁱⁱⁱ	2.370 (3)	N4—C1	1.347 (6)
Cd2—O2	2.242 (3)	N4—C5	1.349 (6)
Cd2—O2^iv	2.242 (3)	C1—C2	1.369 (6)
Cd2—N1^v	2.284 (3)	C1—H1A	0.9400
Cd2—N1ⁱ	2.284 (3)	C2—C3	1.397 (6)
Cd2—O4^iv	2.363 (3)	C2—H2A	0.9400
Cd2—O4	2.363 (3)	C3—C4	1.401 (6)
O1—C6	1.252 (5)	C3—C6	1.507 (6)
O2—C6	1.257 (5)	C4—C5	1.365 (6)
O3—N4	1.332 (5)	C4—H4A	0.9400
O3—Cd1^vi	2.370 (3)	C5—H5A	0.9400

N1—Cd1—N1ⁱ	180.000 (1)	C6—O2—Cd2	130.6 (3)
N1—Cd1—O1	85.90 (12)	N4—O3—Cd1^vi	118.5 (2)
N1ⁱ—Cd1—O1	94.10 (12)	Cd2—O4—H4B	109.5
N1—Cd1—O1ⁱ	94.10 (12)	Cd2—O4—H4C	120.1
N1ⁱ—Cd1—O1ⁱ	85.90 (12)	H4B—O4—H4C	130.4
O1—Cd1—O1ⁱ	180.0	N2—N1—Cd1	122.0 (3)
N1—Cd1—O3ⁱⁱ	90.18 (12)	N2—N1—Cd2^vii	117.2 (3)
N1ⁱ—Cd1—O3ⁱⁱ	89.82 (12)	Cd1—N1—Cd2^vii	119.53 (15)
O1—Cd1—O3ⁱⁱ	89.01 (11)	N3—N2—N1	178.2 (5)
O1ⁱ—Cd1—O3ⁱⁱ	90.99 (11)	O3—N4—C1	120.0 (4)
N1—Cd1—O3ⁱⁱⁱ	89.82 (12)	O3—N4—C5	118.9 (4)
N1ⁱ—Cd1—O3ⁱⁱⁱ	90.18 (12)	C1—N4—C5	121.2 (4)
O1—Cd1—O3ⁱⁱⁱ	90.99 (11)	N4—C1—C2	120.9 (4)
O1ⁱ—Cd1—O3ⁱⁱⁱ	89.01 (11)	N4—C1—H1A	119.5
O3ⁱⁱ—Cd1—O3ⁱⁱⁱ	180.0	C2—C1—H1A	119.5
O2—Cd2—O2^iv	180.0	C1—C2—C3	119.4 (4)
O2—Cd2—N1^v	85.06 (12)	C1—C2—H2A	120.3
O2^iv—Cd2—N1^v	94.94 (12)	C3—C2—H2A	120.3
O2—Cd2—N1ⁱ	94.94 (12)	C2—C3—C4	118.0 (4)
O2^iv—Cd2—N1ⁱ	85.06 (12)	C2—C3—C6	120.9 (4)
N1^v—Cd2—N1ⁱ	180.000 (1)	C4—C3—C6	121.1 (4)
O2—Cd2—O4^iv	87.87 (12)	C5—C4—C3	120.4 (4)
O2^iv—Cd2—O4^iv	92.13 (12)	C5—C4—H4A	119.8
N1^v—Cd2—O4^iv	94.08 (12)	C3—C4—H4A	119.8
N1ⁱ—Cd2—O4^iv	85.92 (12)	N4—C5—C4	119.9 (4)
O2—Cd2—O4	92.13 (12)	N4—C5—H5A	120.0
O2^iv—Cd2—O4	87.87 (12)	C4—C5—H5A	120.0
N1^v—Cd2—O4	85.92 (12)	O1—C6—O2	127.4 (4)
N1ⁱ—Cd2—O4	94.08 (12)	O1—C6—C3	117.1 (4)
O4^iv—Cd2—O4	180.0	O2—C6—C3	115.5 (4)
C6—O1—Cd1	132.5 (3)

N1—Cd1—O1—C6	141.5 (4)	O3—N4—C1—C2	−177.8 (4)
N1ⁱ—Cd1—O1—C6	−38.5 (4)	C5—N4—C1—C2	2.5 (6)
O3ⁱⁱ—Cd1—O1—C6	51.2 (4)	N4—C1—C2—C3	0.8 (6)
O3ⁱⁱⁱ—Cd1—O1—C6	−128.8 (4)	C1—C2—C3—C4	−3.5 (6)
N1^v—Cd2—O2—C6	136.6 (4)	C1—C2—C3—C6	174.4 (4)
N1ⁱ—Cd2—O2—C6	−43.4 (4)	C2—C3—C4—C5	2.9 (6)
O4^iv—Cd2—O2—C6	−129.1 (4)	C6—C3—C4—C5	−174.9 (4)
O4—Cd2—O2—C6	50.9 (4)	O3—N4—C5—C4	177.2 (4)
O1—Cd1—N1—N2	17.4 (4)	C1—N4—C5—C4	−3.1 (6)
O1ⁱ—Cd1—N1—N2	−162.6 (4)	C3—C4—C5—N4	0.3 (7)
O3ⁱⁱ—Cd1—N1—N2	106.4 (4)	Cd1—O1—C6—O2	38.1 (7)
O3ⁱⁱⁱ—Cd1—N1—N2	−73.6 (4)	Cd1—O1—C6—C3	−140.8 (3)
O1—Cd1—N1—Cd2^vii	−176.10 (19)	Cd2—O2—C6—O1	15.1 (7)
O1ⁱ—Cd1—N1—Cd2^vii	3.90 (19)	Cd2—O2—C6—C3	−166.0 (3)
O3ⁱⁱ—Cd1—N1—Cd2^vii	−87.11 (18)	C2—C3—C6—O1	9.4 (6)
O3ⁱⁱⁱ—Cd1—N1—Cd2^vii	92.89 (18)	C4—C3—C6—O1	−172.8 (4)
Cd1^vi—O3—N4—C1	103.7 (4)	C2—C3—C6—O2	−169.6 (4)
Cd1^vi—O3—N4—C5	−76.7 (4)	C4—C3—C6—O2	8.1 (6)

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

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O4—H4C···N3^viii	0.90	2.36	3.239 (7)	167
O4—H4B···O3^ix	0.83	2.05	2.716 (4)	137

Symmetry codes: (viii) −x+1, −y+1, −z+1; (ix) −x+1, −y+1, −z+2.

Experimental details

Crystal data
Chemical formula	[Cd₂(C₆H₄NO₃)₂(N₃)₂(H₂O)₂]
M_r	621.10
Crystal system, space group	Triclinic, P1
Temperature (K)	223
a, b, c (Å)	6.5409 (17), 7.850 (2), 9.410 (3)
α, β, γ (°)	99.668 (6), 97.164 (6), 107.566 (5)
V (Å³)	446.1 (2)
Z	1
Radiation type	Mo Kα
µ (mm⁻¹)	2.45
Crystal size (mm)	0.3 × 0.2 × 0.2

Data collection
Diffractometer	Rigaku Scxmini 1K CCD area-detector diffractometer
Absorption correction	Multi-scan (CrystalClear; Rigaku, 2005)
T_min, T_max	0.612, 0.613
No. of measured, independent and observed [I > 2σ(I)] reflections	5082, 1567, 1438
R_int	0.022
(sin θ/λ)_max (Å⁻¹)	0.595

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.033, 0.087, 1.08
No. of reflections	1567
No. of parameters	139
No. of restraints	1
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.60, −1.02

Computer programs: CrystalClear (Rigaku, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), Mercury (Macrae et al., 2006) and SHELXTL (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Selected geometric parameters (Å, º) top

Cd1—N1	2.259 (3)	Cd2—O2	2.242 (3)
Cd1—O1	2.289 (3)	Cd2—N1ⁱⁱ	2.284 (3)
Cd1—O3ⁱ	2.370 (3)	Cd2—O4	2.363 (3)

N1—Cd1—O1	85.90 (12)	O2—Cd2—N1ⁱⁱ	85.06 (12)
N1ⁱⁱⁱ—Cd1—O1	94.10 (12)	O2—Cd2—O4^v	87.87 (12)
N1—Cd1—O3ⁱ	90.18 (12)	O2^v—Cd2—O4^v	92.13 (12)
O1—Cd1—O3ⁱ	89.01 (11)	N1ⁱⁱ—Cd2—O4^v	94.08 (12)
N1—Cd1—O3^iv	89.82 (12)	N1ⁱⁱⁱ—Cd2—O4^v	85.92 (12)

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

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O4—H4C···N3^vi	0.90	2.36	3.239 (7)	167
O4—H4B···O3^vii	0.83	2.05	2.716 (4)	137

Symmetry codes: (vi) −x+1, −y+1, −z+1; (vii) −x+1, −y+1, −z+2.

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