Poly[aqua­[μ3-N′-(carboxy­meth­yl)ethyl­ene­diamine-N,N,N′-triacetato]samarium(III)]

Zhou, G.-Y.; Wu, G.-R.; Deng, Z.-Y.; Chen, X.-T.

doi:10.1107/S1600536808031036

metal-organic compounds

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ISSN: 2056-9890

Volume 64| Part 10| October 2008| Page m1348

doi:10.1107/S1600536808031036

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Poly[aqua[μ₃-N′-(carboxymethyl)ethylenediamine-N,N,N′-triacetato]samarium(III)]

Guo-Yong Zhou,^a Gui-Rong Wu,^a ^* Zhi-Yong Deng ^a and Xing-Tian Chen ^a

^aDepartment of Chemistry and Biology Engineering, Hezhou University, Hezhou, Guangxi Zhuang Autonomous Region 542800, People's Republic of China
^*Correspondence e-mail: gyzhou@yahoo.cn

(Received 31 August 2008; accepted 25 September 2008; online 30 September 2008)

In the title coordination polymer, [Sm(C₁₀H₁₃N₂O₈)(H₂O)]_n, each samarium(III) centre is nine-coordinated by six O and two N atoms from three N′-(carboxymethyl)ethylenediamine-N,N,N′-triacetate ligands and one O atom of a water molecule, forming polymeric chains running parallel to the a axis. The packing is governed by intermolecular O—H⋯O hydrogen-bonding interactions.

Related literature

For the corresponding neodymium polymeric complex, see: Huang et al. (2008 ). For related literature, see: Dakanali et al. (2003 ); Kitaura et al. (2002 ); Rowsell et al. (2004 ).

Experimental

Crystal data

[Sm(C₁₀H₁₃N₂O₈)(H₂O)]
M_r = 457.60
Orthorhombic, P b c a
a = 6.6506 (7) Å
b = 14.7051 (16) Å
c = 25.967 (3) Å
V = 2539.5 (5) Å³
Z = 8
Mo Kα radiation
μ = 4.68 mm⁻¹
T = 296 (2) K
0.23 × 0.19 × 0.18 mm

Data collection

Bruker APEXII area-detector diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ) T_min = 0.355, T_max = 0.433
13066 measured reflections
2637 independent reflections
2289 reflections with I > 2σ(I)
R_int = 0.035

Refinement

R[F² > 2σ(F²)] = 0.028
wR(F²) = 0.064
S = 1.03
2637 reflections
206 parameters
3 restraints
H atoms treated by a mixture of independent and constrained refinement
Δρ_max = 0.94 e Å⁻³
Δρ_min = −1.21 e Å⁻³

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4⋯O2ⁱ	0.82	1.66	2.474 (4)	170
O1W—H1W⋯O6ⁱⁱ	0.820 (10)	2.02 (2)	2.771 (4)	152.8 (18)
O1W—H2W⋯O8ⁱⁱⁱ	0.823 (10)	2.10 (2)	2.928 (4)	177.1 (15)
Symmetry codes: (i) $[-x+{\script{5\over 2}}, y+{\script{1\over 2}}, z]$ ; (ii) -x+2, -y+1, -z+1; (iii) $[x+{\script{1\over 2}}, -y+{\script{1\over 2}}, -z+1]$ .

Data collection: APEX2 (Bruker, 2004 ); cell refinement: SAINT (Bruker, 2004); 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 datablock I. DOI: 10.1107/S1600536808031036/rz2243sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536808031036/rz2243Isup2.hkl

checkCIF report

Comment top

Research on metal–organic frameworks has been expanding rapidly, due to their interesting structural motifs (Dakanali et al., 2003) and other potential applications (Kitaura et al., 2002; Rowsell et al., 2004) in molecular-based materials. Ethylenediaminetetraacetic acid (H₄edta) is a good example of a bridging ligand that can link metal centres into extended networks. Herein, we report a new samarium complex obtained by the hydrothermal treatment of Sm₂O₃ and H₄edta in the presence of HClO₄.

The samarium(III) metal centre is nine-coordinated by six oxygen and two nitrogen atoms from three different N'-(carboxymethyl)ethylenediamine-N,N,N'-triacetato ligands and one water molecule (Fig. 1) to form a polymeric chain running parallel to the crystallographic a axis (Fig. 2). The Sm···Sm separations between adjacent metal centres are 4.2461 (6) and 6.6506 (8) Å. The polymeric chains self-assemble via intermolecular O—H···O hydrogen bonding interactions (Table 1) to form a three-dimensional supramolecular network. The title compound is isostructural with the corresponding neodymium polymeric complex (Huang et al., 2008).

Related literature top

For the corresponding neodymium polymeric complex, see: Huang et al. (2008). For related literature, see: Dakanali et al. (2003); Kitaura et al. (2002); Rowsell et al. (2004).

Experimental top

A mixture of Sm₂O₃ (0.5 mmol), ethylenediaminetetraacetic acid (H₄edta) (0.5 mmol), HClO₄ (0.2 mmol) and H₂O (10 ml) was placed in a 23 ml Teflon reactor, which was heated to 433 K for three days and then cooled to room temperature at a rate of 10 K h^-1. The crystals obtained were washed with water and dryed in air.

Computing details top

Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); 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 compound, showing the atomic numbering scheme. Non-H atoms are shown as 30% probability displacement ellipsoids. Symmetry codes: (i: 1+x, y, z; ii: 2-x, 1-y, 1-z).
	Fig. 2. The one-dimensional polymeric chain of the title compound.

Poly[aqua[µ₃-N'-(carboxymethyl)ethylenediamine-N,N,N'-triacetato] samarium(III)] top

Crystal data top

[Sm(C₁₀H₁₃N₂O₈)(H₂O)]	F(000) = 1784
M_r = 457.60	D_x = 2.394 Mg m⁻³
Orthorhombic, Pbca	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2ab	Cell parameters from 3600 reflections
a = 6.6506 (7) Å	θ = 1.7–28.0°
b = 14.7051 (16) Å	µ = 4.68 mm⁻¹
c = 25.967 (3) Å	T = 296 K
V = 2539.5 (5) Å³	Block, colourless
Z = 8	0.23 × 0.19 × 0.18 mm

Data collection top

Bruker APEXII area-detector diffractometer	2637 independent reflections
Radiation source: fine-focus sealed tube	2289 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.035
ϕ and ω scan	θ_max = 26.5°, θ_min = 1.6°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −8→5
T_min = 0.355, T_max = 0.433	k = −16→18
13066 measured reflections	l = −32→32

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)] = 0.028	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.064	H atoms treated by a mixture of independent and constrained refinement
S = 1.03	w = 1/[σ²(F_o²) + (0.0288P)² + 6.2721P] where P = (F_o² + 2F_c²)/3
2637 reflections	(Δ/σ)_max = 0.002
206 parameters	Δρ_max = 0.94 e Å⁻³
3 restraints	Δρ_min = −1.21 e Å⁻³

Crystal data top

[Sm(C₁₀H₁₃N₂O₈)(H₂O)]	V = 2539.5 (5) Å³
M_r = 457.60	Z = 8
Orthorhombic, Pbca	Mo Kα radiation
a = 6.6506 (7) Å	µ = 4.68 mm⁻¹
b = 14.7051 (16) Å	T = 296 K
c = 25.967 (3) Å	0.23 × 0.19 × 0.18 mm

Data collection top

Bruker APEXII area-detector diffractometer	2637 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	2289 reflections with I > 2σ(I)
T_min = 0.355, T_max = 0.433	R_int = 0.035
13066 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.028	3 restraints
wR(F²) = 0.064	H atoms treated by a mixture of independent and constrained refinement
S = 1.03	Δρ_max = 0.94 e Å⁻³
2637 reflections	Δρ_min = −1.21 e Å⁻³
206 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
Sm1	1.07590 (3)	0.506856 (12)	0.420681 (7)	0.01387 (8)
C1	1.2133 (6)	0.3523 (3)	0.33453 (14)	0.0168 (8)
C2	1.0904 (6)	0.2870 (3)	0.36651 (15)	0.0186 (8)
H2A	1.0170	0.2467	0.3437	0.022*
H2B	1.1807	0.2500	0.3870	0.022*
C3	0.7461 (6)	0.3440 (3)	0.37554 (15)	0.0197 (8)
H3A	0.6543	0.3739	0.3991	0.024*
H3B	0.6918	0.2843	0.3678	0.024*
C4	0.7586 (6)	0.3985 (3)	0.32648 (14)	0.0193 (8)
H4A	0.8580	0.3713	0.3039	0.023*
H4B	0.6297	0.3965	0.3090	0.023*
C5	0.9165 (6)	0.5334 (3)	0.29164 (15)	0.0186 (8)
H5A	0.8189	0.5486	0.2652	0.022*
H5B	1.0097	0.4893	0.2774	0.022*
C6	1.0293 (6)	0.6179 (3)	0.30788 (15)	0.0178 (8)
C7	0.6310 (6)	0.5491 (3)	0.34790 (15)	0.0199 (9)
H7A	0.5163	0.5205	0.3315	0.024*
H7B	0.6467	0.6091	0.3329	0.024*
C8	0.5880 (6)	0.5592 (3)	0.40475 (15)	0.0166 (8)
C9	0.9173 (6)	0.2796 (3)	0.44879 (15)	0.0194 (9)
H9A	1.0277	0.2369	0.4522	0.023*
H9B	0.7942	0.2447	0.4458	0.023*
C10	0.9064 (6)	0.3372 (3)	0.49695 (15)	0.0173 (8)
N1	0.9459 (5)	0.3332 (2)	0.40114 (12)	0.0164 (7)
N2	0.8138 (5)	0.4946 (2)	0.33643 (12)	0.0173 (7)
O1	1.2293 (4)	0.43367 (18)	0.34962 (10)	0.0207 (6)
O2	1.2980 (5)	0.32419 (18)	0.29435 (10)	0.0235 (7)
O3	1.0724 (4)	0.63138 (19)	0.35307 (11)	0.0232 (7)
O4	1.0758 (5)	0.6717 (2)	0.27029 (11)	0.0292 (7)
H4	1.1182	0.7199	0.2819	0.044*
O5	0.9074 (4)	0.42346 (18)	0.49227 (10)	0.0203 (6)
O6	0.7369 (4)	0.5605 (2)	0.43483 (10)	0.0233 (6)
O7	0.4107 (4)	0.57144 (19)	0.41872 (11)	0.0211 (6)
O8	0.9000 (5)	0.2985 (2)	0.53938 (11)	0.0294 (7)
O1W	1.3250 (5)	0.3977 (2)	0.46232 (11)	0.0271 (7)
H2W	1.350 (8)	0.3428 (10)	0.4613 (15)	0.041*
H1W	1.348 (8)	0.412 (3)	0.4922 (7)	0.041*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Sm1	0.01036 (12)	0.01782 (12)	0.01343 (12)	0.00028 (8)	0.00067 (7)	−0.00100 (8)
C1	0.0145 (19)	0.021 (2)	0.0153 (18)	0.0028 (16)	0.0001 (15)	−0.0005 (15)
C2	0.019 (2)	0.0179 (19)	0.019 (2)	0.0032 (17)	0.0014 (16)	0.0000 (16)
C3	0.016 (2)	0.0196 (19)	0.023 (2)	−0.0039 (17)	−0.0008 (18)	−0.0007 (16)
C4	0.017 (2)	0.022 (2)	0.0197 (19)	−0.0027 (16)	−0.0040 (17)	−0.0026 (15)
C5	0.019 (2)	0.022 (2)	0.0152 (19)	−0.0017 (17)	−0.0002 (16)	−0.0008 (16)
C6	0.0142 (19)	0.018 (2)	0.021 (2)	0.0000 (16)	0.0007 (16)	0.0010 (16)
C7	0.016 (2)	0.026 (2)	0.018 (2)	0.0035 (17)	0.0008 (16)	0.0034 (17)
C8	0.014 (2)	0.0157 (18)	0.020 (2)	−0.0015 (15)	0.0019 (16)	−0.0007 (15)
C9	0.025 (2)	0.017 (2)	0.016 (2)	0.0001 (17)	0.0005 (17)	0.0022 (15)
C10	0.0102 (19)	0.024 (2)	0.0176 (19)	−0.0010 (16)	0.0031 (15)	0.0005 (16)
N1	0.0181 (18)	0.0169 (16)	0.0143 (16)	0.0004 (14)	0.0019 (13)	0.0000 (13)
N2	0.0138 (16)	0.0193 (17)	0.0187 (16)	0.0011 (14)	0.0008 (13)	0.0005 (14)
O1	0.0174 (15)	0.0206 (14)	0.0242 (14)	−0.0011 (12)	0.0052 (12)	−0.0055 (12)
O2	0.0319 (18)	0.0201 (14)	0.0186 (14)	0.0006 (13)	0.0078 (12)	−0.0020 (12)
O3	0.0277 (17)	0.0257 (16)	0.0163 (14)	−0.0039 (13)	−0.0037 (12)	0.0008 (12)
O4	0.046 (2)	0.0227 (16)	0.0190 (15)	−0.0149 (15)	0.0017 (14)	0.0007 (12)
O5	0.0218 (16)	0.0184 (14)	0.0209 (15)	−0.0051 (12)	0.0034 (12)	−0.0039 (11)
O6	0.0133 (14)	0.0355 (17)	0.0211 (14)	0.0051 (13)	−0.0039 (12)	−0.0038 (12)
O7	0.0115 (14)	0.0224 (15)	0.0295 (16)	−0.0004 (11)	0.0016 (12)	−0.0047 (12)
O8	0.0337 (19)	0.0355 (18)	0.0189 (15)	0.0007 (15)	0.0027 (13)	0.0061 (13)
O1W	0.0303 (18)	0.0290 (17)	0.0221 (16)	0.0045 (15)	−0.0043 (14)	0.0029 (13)

Geometric parameters (Å, º) top

Sm1—O1	2.367 (3)	C5—C6	1.512 (5)
Sm1—O6	2.416 (3)	C5—H5A	0.9700
Sm1—O7ⁱ	2.421 (3)	C5—H5B	0.9700
Sm1—O5ⁱⁱ	2.484 (3)	C6—O3	1.224 (5)
Sm1—O5	2.493 (3)	C6—O4	1.294 (5)
Sm1—O3	2.537 (3)	C7—N2	1.486 (5)
Sm1—O1W	2.548 (3)	C7—C8	1.511 (5)
Sm1—N1	2.744 (3)	C7—H7A	0.9700
Sm1—N2	2.803 (3)	C7—H7B	0.9700
C1—O2	1.256 (4)	C8—O7	1.247 (5)
C1—O1	1.263 (5)	C8—O6	1.261 (5)
C1—C2	1.510 (5)	C9—N1	1.479 (5)
C2—N1	1.481 (5)	C9—C10	1.512 (5)
C2—H2A	0.9700	C9—H9A	0.9700
C2—H2B	0.9700	C9—H9B	0.9700
C3—N1	1.494 (5)	C10—O8	1.241 (5)
C3—C4	1.507 (5)	C10—O5	1.274 (5)
C3—H3A	0.9700	O4—H4	0.8200
C3—H3B	0.9700	O5—Sm1ⁱⁱ	2.484 (3)
C4—N2	1.483 (5)	O7—Sm1ⁱⁱⁱ	2.421 (3)
C4—H4A	0.9700	O1W—H2W	0.823 (10)
C4—H4B	0.9700	O1W—H1W	0.820 (10)
C5—N2	1.464 (5)

O1—Sm1—O6	131.98 (9)	N2—C4—H4B	109.2
O1—Sm1—O7ⁱ	76.45 (9)	C3—C4—H4B	109.2
O6—Sm1—O7ⁱ	137.16 (10)	H4A—C4—H4B	107.9
O1—Sm1—O5ⁱⁱ	151.34 (10)	N2—C5—C6	109.3 (3)
O6—Sm1—O5ⁱⁱ	76.64 (9)	N2—C5—H5A	109.8
O7ⁱ—Sm1—O5ⁱⁱ	79.40 (9)	C6—C5—H5A	109.8
O1—Sm1—O5	123.46 (9)	N2—C5—H5B	109.8
O6—Sm1—O5	68.14 (9)	C6—C5—H5B	109.8
O7ⁱ—Sm1—O5	128.46 (9)	H5A—C5—H5B	108.3
O5ⁱⁱ—Sm1—O5	62.91 (10)	O3—C6—O4	124.6 (4)
O1—Sm1—O3	78.03 (9)	O3—C6—C5	121.1 (4)
O6—Sm1—O3	82.03 (9)	O4—C6—C5	114.2 (3)
O7ⁱ—Sm1—O3	73.18 (9)	N2—C7—C8	113.8 (3)
O5ⁱⁱ—Sm1—O3	109.41 (9)	N2—C7—H7A	108.8
O5—Sm1—O3	150.11 (9)	C8—C7—H7A	108.8
O1—Sm1—O1W	76.36 (9)	N2—C7—H7B	108.8
O6—Sm1—O1W	138.39 (10)	C8—C7—H7B	108.8
O7ⁱ—Sm1—O1W	70.02 (10)	H7A—C7—H7B	107.7
O5ⁱⁱ—Sm1—O1W	81.07 (10)	O7—C8—O6	124.1 (4)
O5—Sm1—O1W	70.48 (10)	O7—C8—C7	118.5 (3)
O3—Sm1—O1W	138.98 (10)	O6—C8—C7	117.2 (3)
O1—Sm1—N1	64.43 (9)	N1—C9—C10	113.6 (3)
O6—Sm1—N1	92.16 (10)	N1—C9—H9A	108.9
O7ⁱ—Sm1—N1	130.62 (9)	C10—C9—H9A	108.9
O5ⁱⁱ—Sm1—N1	124.49 (9)	N1—C9—H9B	108.9
O5—Sm1—N1	62.50 (9)	C10—C9—H9B	108.9
O3—Sm1—N1	122.76 (9)	H9A—C9—H9B	107.7
O1W—Sm1—N1	72.34 (10)	O8—C10—O5	122.8 (4)
O1—Sm1—N2	68.30 (10)	O8—C10—C9	118.6 (4)
O6—Sm1—N2	63.86 (9)	O5—C10—C9	118.6 (3)
O7ⁱ—Sm1—N2	125.50 (9)	C9—N1—C2	110.3 (3)
O5ⁱⁱ—Sm1—N2	139.87 (9)	C9—N1—C3	108.3 (3)
O5—Sm1—N2	105.71 (9)	C2—N1—C3	110.8 (3)
O3—Sm1—N2	60.04 (9)	C9—N1—Sm1	112.4 (2)
O1W—Sm1—N2	134.02 (10)	C2—N1—Sm1	109.5 (2)
N1—Sm1—N2	66.42 (9)	C3—N1—Sm1	105.3 (2)
O2—C1—O1	122.1 (4)	C5—N2—C4	110.4 (3)
O2—C1—C2	119.3 (3)	C5—N2—C7	109.3 (3)
O1—C1—C2	118.5 (3)	C4—N2—C7	110.2 (3)
N1—C2—C1	113.2 (3)	C5—N2—Sm1	107.8 (2)
N1—C2—H2A	108.9	C4—N2—Sm1	110.6 (2)
C1—C2—H2A	108.9	C7—N2—Sm1	108.5 (2)
N1—C2—H2B	108.9	C1—O1—Sm1	129.5 (2)
C1—C2—H2B	108.9	C6—O3—Sm1	123.3 (3)
H2A—C2—H2B	107.8	C6—O4—H4	109.5
N1—C3—C4	112.6 (3)	C10—O5—Sm1ⁱⁱ	108.9 (2)
N1—C3—H3A	109.1	C10—O5—Sm1	124.3 (2)
C4—C3—H3A	109.1	Sm1ⁱⁱ—O5—Sm1	117.09 (10)
N1—C3—H3B	109.1	C8—O6—Sm1	129.3 (2)
C4—C3—H3B	109.1	C8—O7—Sm1ⁱⁱⁱ	145.0 (3)
H3A—C3—H3B	107.8	Sm1—O1W—H2W	137 (3)
N2—C4—C3	111.9 (3)	Sm1—O1W—H1W	111 (3)
N2—C4—H4A	109.2	H2W—O1W—H1W	104 (4)
C3—C4—H4A	109.2

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

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O4—H4···O2^iv	0.82	1.66	2.474 (4)	170
O1W—H1W···O6ⁱⁱ	0.82 (1)	2.02 (2)	2.771 (4)	153 (2)
O1W—H2W···O8^v	0.82 (1)	2.10 (2)	2.928 (4)	177 (2)

Symmetry codes: (ii) −x+2, −y+1, −z+1; (iv) −x+5/2, y+1/2, z; (v) x+1/2, −y+1/2, −z+1.

Experimental details

Crystal data
Chemical formula	[Sm(C₁₀H₁₃N₂O₈)(H₂O)]
M_r	457.60
Crystal system, space group	Orthorhombic, Pbca
Temperature (K)	296
a, b, c (Å)	6.6506 (7), 14.7051 (16), 25.967 (3)
V (Å³)	2539.5 (5)
Z	8
Radiation type	Mo Kα
µ (mm⁻¹)	4.68
Crystal size (mm)	0.23 × 0.19 × 0.18

Data collection
Diffractometer	Bruker APEXII area-detector diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996)
T_min, T_max	0.355, 0.433
No. of measured, independent and observed [I > 2σ(I)] reflections	13066, 2637, 2289
R_int	0.035
(sin θ/λ)_max (Å⁻¹)	0.628

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.028, 0.064, 1.03
No. of reflections	2637
No. of parameters	206
No. of restraints	3
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.94, −1.21

Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O4—H4···O2ⁱ	0.82	1.66	2.474 (4)	169.5
O1W—H1W···O6ⁱⁱ	0.820 (10)	2.02 (2)	2.771 (4)	152.8 (18)
O1W—H2W···O8ⁱⁱⁱ	0.823 (10)	2.10 (2)	2.928 (4)	177.1 (15)

Symmetry codes: (i) −x+5/2, y+1/2, z; (ii) −x+2, −y+1, −z+1; (iii) x+1/2, −y+1/2, −z+1.

Acknowledgements

The authors acknowledge Hezhou University for supporting this work.

References

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