Poly[diaqua­(μ2-5-carboxy­pyridine-3-carboxyl­ato-κ2N:O3)hemi(μ2-oxalato-κ4O1,O2:O1′,O2′)(μ4-pyridine-3,5-dicarboxyl­ato-κ4N:O3:O3′:O5)silver(I)terbium(III)]

Guo, H.-F.; Qin, L.; Hao, X.-Y.

doi:10.1107/S1600536809036393

metal-organic compounds

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ISSN: 2056-9890

Volume 65| Part 10| October 2009| Pages m1214-m1215

doi:10.1107/S1600536809036393

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Poly[diaqua(μ₂-5-carboxypyridine-3-carboxylato-κ²N:O³)hemi(μ₂-oxalato-κ⁴O¹,O²:O^1′,O^2′)(μ₄-pyridine-3,5-dicarboxylato-κ⁴N:O³:O^3′:O⁵)silver(I)terbium(III)]

Hai-Fu Guo,^a ^* Liang Qin ^a and Xiang-Ying Hao ^a

^aSchool of Chemistry and Chemical Engineering, Zhao Qing University, Zhao Qing 526061, People's Republic of China
^*Correspondence e-mail: guohf60@yahoo.cn

(Received 2 September 2009; accepted 9 September 2009; online 16 September 2009)

In the title coordination polymer, [AgTb(C₇H₃NO₄)(C₇H₄NO₄)(C₂O₄)_0.5(H₂O)₂]_n, the Tb^III ion is eight-coordinated by three O atoms from three different pydc (H₂pydc = pyridine-3,5-dicarboxylic acid) ligands, one O atom from one Hpydc ligand, two O atoms from one oxalate ligand and two water molecules in a distorted square-antiprismatic geometry. The Ag^I ion is coordinated in an almost linear fashion by two pyridyl N atoms from one pydc and one Hpydc ligand and has weak interactions with two carboxylate O atoms. The carboxylate groups of pydc and Hpydc ligands link Tb centers, forming a one-dimensional chain. The oxalate adopts a tetradentate bis-chelating coordination mode, connecting the chains into a two-dimensional layer. These layers are further assembled via [Ag(pydc)(Hpydc)] pillars and O—H⋯O and C—H⋯O hydrogen bonds into a three-dimensional coordination framework.

Related literature

For general background to transition metal–lanthanide complexes, see: Barbour (2006 ); Kepert (2006 ); Kong et al. (2008 ); Rao et al. (2004 ); Wu et al. (2008 ); Zhang et al. (2005 ).

Experimental

Crystal data

[AgTb(C₇H₃NO₄)(C₇H₄NO₄)(C₂O₄)_0.5(H₂O)₂]
M_r = 678.05
Triclinic, $[P \overline 1]$
a = 7.592 (3) Å
b = 8.249 (3) Å
c = 14.241 (6) Å
α = 98.956 (4)°
β = 99.556 (4)°
γ = 95.839 (5)°
V = 861.3 (6) Å³
Z = 2
Mo Kα radiation
μ = 5.29 mm⁻¹
T = 293 K
0.30 × 0.24 × 0.19 mm

Data collection

Bruker APEXII CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ) T_min = 0.251, T_max = 0.378
4416 measured reflections
3032 independent reflections
2862 reflections with I > 2σ(I)
R_int = 0.018

Refinement

R[F² > 2σ(F²)] = 0.023
wR(F²) = 0.062
S = 1.09
3032 reflections
284 parameters
H atoms treated by a mixture of independent and constrained refinement
Δρ_max = 0.85 e Å⁻³
Δρ_min = −0.79 e Å⁻³

Table 1
Selected bond lengths (Å)

Tb1—O2	2.346 (3)
Tb1—O5	2.364 (3)
Tb1—O6ⁱ	2.365 (3)
Tb1—O8ⁱⁱ	2.317 (3)
Tb1—O9	2.444 (3)
Tb1—O10ⁱⁱⁱ	2.401 (3)
Tb1—O1W	2.421 (3)
Tb1—O2W	2.468 (3)
Ag1—N1	2.172 (4)
Ag1—N2^iv	2.162 (4)
Ag1—O7^v	2.772 (3)
Ag1—O7^vi	2.859 (3)
Symmetry codes: (i) -x+2, -y+1, -z; (ii) x, y-1, z; (iii) -x+1, -y, -z; (iv) -x+1, -y+1, -z+1; (v) x-1, y-1, z; (vi) -x+1, -y+2, -z+1.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1W—H1W⋯O5ⁱ	0.84	2.08	2.820 (5)	147
O1W—H1W⋯O2Wⁱ	0.84	2.55	3.221 (5)	138
O1W—H2W⋯O9^vii	0.84	2.05	2.855 (4)	159
O2W—H3W⋯O10^viii	0.84	2.13	2.839 (4)	142
O2W—H4W⋯O1^viii	0.84	2.04	2.873 (5)	173
O3—H3A⋯O1^ix	0.90 (6)	1.71 (7)	2.554 (5)	154 (6)
C10—H10⋯O2W^ix	0.93	2.40	3.314 (6)	169
Symmetry codes: (i) -x+2, -y+1, -z; (vii) -x+1, -y+1, -z; (viii) x+1, y, z; (ix) x, y+1, z.

Data collection: APEX2 (Bruker, 2007 ); cell refinement: SAINT (Bruker, 2007); 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) and DIAMOND (Brandenburg, 1999 ); software used to prepare material for publication: SHELXTL.

Supporting information

Crystal structure: contains datablock I. DOI: 10.1107/S1600536809036393/hy2227sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536809036393/hy2227Isup2.hkl

checkCIF report

Comment top

The design and construction of transition–lanthanide metal complexes has gained great recognition over the last decade because of their intriguing network topolopies and potential applications, and due to their magnetic properties, their capacity for gas storage, as luminescent materials, and so on (Barbour, 2006; Kepert, 2006; Kong et al., 2008; Rao et al., 2004; Zhang et al., 2005). Pyridine-3,5-dicarboxylic acid (H₂pydc) is a multifunctional bridging ligand possessing of O and N donors, which can thus be chosen to construct lanthanide–transition heterometallic complex via the carboxyl O atoms binding to lanthanides and N atoms bonding to transition metal ions such as Ag^I or Cu^I (Wu et al., 2008). On the basis of above considerations, we utilize H₂pydc, mixed 4d–4f metal ions and nitric acid as our building blocks. A new three-dimensional 4d–4f coordination framework resulted from the hydrothermal treatment of Tb₂O₃, AgNO₃, oxalic acid, H₂pydc and nitric acid in water.

As depicted in Fig. 1, the asymmtric unit of the title compound contains one Tb^III ion, one Ag^I ion, half an oxalate ligand, one pydc ligand, one Hpydc ligand and two water molecules. The Tb^III ion is eight-coordinated in a distorted square-antiprismatic coordination geometry by three O atoms from three different pydc ligands, one O atom from one Hpydc ligand, two O atoms from one oxalate ligand and two water molecules. The Ag^I ion is located in an almost linear configuration, defined by two N atoms from one pydc and one Hpydc ligands. The carboxylate groups of the pydc and Hpydc ligands link Tb^III center to form a one-dimensional chain with a shortest Tb···Tb distance of 5.261 (3) Å (Fig. 2a). The oxalate adopts tetradentate bischelating coordination mode to connect the neighboring chains into a two-dimensional layer (Fig. 2b). These layers are further assembled via [Ag(pydc)(Hpydc)] pillars into a three-dimensional coordination framework (Fig. 3). O—H···O and C—H···O hydrogen bonds (Table 1) involving the carboxyl group and coordinated water molecules enhance the stability of the three-dimensional network.

Related literature top

For general background to transition metal–lanthanide complexes, see: Barbour (2006); Kepert (2006); Kong et al. (2008); Rao et al. (2004); Wu et al. (2008); Zhang et al. (2005).

Experimental top

A mixture of Tb₂O₃ (0.183 g, 0.5 mmol), AgNO₃ (0.169 g, 1 mmol), H₂pydc (0.167 g, 1 mmol), oxalic acid (0.09 g, 1 mmol), HNO₃ (0.12 ml) and H₂O (10 ml) was placed in a 23 ml Teflon-lined reactor, which was heated to 443 K for 3 d and then cooled to room temperature at a rate of 10 K h^-1. The colorless block crystals obtained were washed with water and dried in air (yield 46% based on Tb).

Computing details top

Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top

	Fig. 1. The asymmetric unit of the title compound. Non-H atoms are shown as 50% probability displacement ellipsoids. H atoms have been omitted for clarity. [Symmetry codes: (i) 1-x, -y, -z; (ii) 2-x, 1-y, -z; (iii) x, -1+y, z.]
	Fig. 2. (a) A view of the one-dimensional chain in the title compound. (b) A polyhedral view of the two-dimensional layer. H atoms have been omitted for clarity.
	Fig. 3. A polyhedral view of the three-dimensional framework. H atoms have been omitted for clarity.

Poly[diaqua(µ₂-5-carboxypyridine-3-carboxylato- κ²N:O³)hemi(µ₂-oxalato- κ⁴O¹,O²:O^1',O^2')(µ₄- pyridine-3,5-dicarboxylato- κ⁴N:O³:O^3':O⁵)silver(I)terbium(III)] top

Crystal data top

[AgTb(C₇H₃NO₄)(C₇H₄NO₄)(C₂O₄)_0.5(H₂O)₂]	Z = 2
M_r = 678.05	F(000) = 646
Triclinic, P1	D_x = 2.615 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 7.592 (3) Å	Cell parameters from 3600 reflections
b = 8.249 (3) Å	θ = 1.4–28°
c = 14.241 (6) Å	µ = 5.29 mm⁻¹
α = 98.956 (4)°	T = 293 K
β = 99.556 (4)°	Block, colorless
γ = 95.839 (5)°	0.30 × 0.24 × 0.19 mm
V = 861.3 (6) Å³

Data collection top

Bruker APEXII CCD diffractometer	3032 independent reflections
Radiation source: fine-focus sealed tube	2862 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.018
ϕ and ω scans	θ_max = 25.2°, θ_min = 2.5°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −9→6
T_min = 0.251, T_max = 0.378	k = −9→9
4416 measured reflections	l = −16→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)] = 0.023	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.062	H atoms treated by a mixture of independent and constrained refinement
S = 1.09	w = 1/[σ²(F_o²) + (0.0323P)²] where P = (F_o² + 2F_c²)/3
3032 reflections	(Δ/σ)_max = 0.049
284 parameters	Δρ_max = 0.85 e Å⁻³
0 restraints	Δρ_min = −0.79 e Å⁻³

Crystal data top

[AgTb(C₇H₃NO₄)(C₇H₄NO₄)(C₂O₄)_0.5(H₂O)₂]	γ = 95.839 (5)°
M_r = 678.05	V = 861.3 (6) Å³
Triclinic, P1	Z = 2
a = 7.592 (3) Å	Mo Kα radiation
b = 8.249 (3) Å	µ = 5.29 mm⁻¹
c = 14.241 (6) Å	T = 293 K
α = 98.956 (4)°	0.30 × 0.24 × 0.19 mm
β = 99.556 (4)°

Data collection top

Bruker APEXII CCD diffractometer	3032 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	2862 reflections with I > 2σ(I)
T_min = 0.251, T_max = 0.378	R_int = 0.018
4416 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.023	0 restraints
wR(F²) = 0.062	H atoms treated by a mixture of independent and constrained refinement
S = 1.09	Δρ_max = 0.85 e Å⁻³
3032 reflections	Δρ_min = −0.79 e Å⁻³
284 parameters

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

	x	y	z	U_iso*/U_eq
Tb1	0.80756 (3)	0.29706 (2)	0.080761 (13)	0.01369 (8)
Ag1	0.17209 (6)	0.40250 (5)	0.53284 (3)	0.03343 (12)
O1	0.4372 (5)	0.2187 (4)	0.2009 (2)	0.0305 (8)
O1W	0.7121 (5)	0.5291 (4)	0.0096 (2)	0.0278 (8)
H1W	0.7742	0.5573	−0.0302	0.042*
H2W	0.6316	0.5904	0.0165	0.042*
O2	0.6205 (4)	0.4300 (4)	0.1747 (2)	0.0255 (7)
O2W	1.0914 (4)	0.1769 (4)	0.0759 (2)	0.0253 (7)
H3W	1.1070	0.1393	0.0200	0.038*
H4W	1.1876	0.1905	0.1166	0.038*
O3	0.4778 (6)	0.9748 (5)	0.2896 (3)	0.0449 (10)
O4	0.3416 (5)	1.0334 (4)	0.4169 (2)	0.0346 (8)
O5	1.0531 (4)	0.5114 (3)	0.1239 (2)	0.0203 (7)
O9	0.5031 (4)	0.2064 (3)	−0.0119 (2)	0.0209 (7)
N1	0.3034 (5)	0.5246 (4)	0.4335 (3)	0.0234 (8)
N2	0.8987 (5)	0.7556 (4)	0.3678 (2)	0.0192 (8)
C1	0.3576 (6)	0.4244 (5)	0.3627 (3)	0.0231 (10)
H1	0.3377	0.3106	0.3601	0.028*
C2	0.4420 (6)	0.4845 (5)	0.2934 (3)	0.0188 (9)
C3	0.4629 (6)	0.6531 (5)	0.2942 (3)	0.0204 (9)
H3	0.5162	0.6965	0.2476	0.025*
C4	0.4032 (6)	0.7568 (5)	0.3654 (3)	0.0200 (9)
C5	0.3273 (6)	0.6886 (5)	0.4347 (3)	0.0208 (10)
H5	0.2917	0.7587	0.4838	0.025*
C6	0.5041 (6)	0.3688 (5)	0.2177 (3)	0.0216 (10)
C7	0.4047 (6)	0.9388 (6)	0.3621 (3)	0.0246 (10)
C8	0.9565 (6)	0.6777 (5)	0.2901 (3)	0.0165 (9)
H8	0.9658	0.5652	0.2849	0.020*
C9	1.0023 (6)	0.7592 (5)	0.2182 (3)	0.0169 (9)
C10	0.9849 (6)	0.9277 (5)	0.2249 (3)	0.0168 (9)
H10	1.0142	0.9848	0.1770	0.020*
C11	0.9234 (6)	1.0091 (5)	0.3038 (3)	0.0166 (9)
C12	0.8845 (6)	0.9188 (5)	0.3740 (3)	0.0201 (9)
H12	0.8469	0.9732	0.4279	0.024*
C13	1.0667 (6)	0.6684 (5)	0.1333 (3)	0.0151 (9)
C15	0.4376 (6)	0.0595 (5)	−0.0196 (3)	0.0168 (9)
O6	1.1310 (4)	0.7500 (3)	0.0780 (2)	0.0211 (7)
C14	0.9003 (6)	1.1915 (5)	0.3113 (3)	0.0202 (10)
O7	0.8768 (5)	1.2673 (4)	0.3899 (2)	0.0328 (8)
O10	0.2771 (4)	−0.0028 (3)	−0.0543 (2)	0.0219 (7)
O8	0.9101 (5)	1.2520 (4)	0.2359 (2)	0.0262 (8)
H3A	0.461 (9)	1.076 (8)	0.276 (4)	0.056 (18)*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Tb1	0.01701 (13)	0.01146 (12)	0.01419 (12)	0.00272 (8)	0.00639 (8)	0.00282 (8)
Ag1	0.0419 (3)	0.0381 (2)	0.0290 (2)	0.00612 (19)	0.01825 (17)	0.01948 (17)
O1	0.049 (2)	0.0185 (16)	0.0251 (17)	0.0037 (16)	0.0116 (15)	0.0024 (13)
O1W	0.033 (2)	0.0227 (16)	0.0388 (19)	0.0149 (15)	0.0194 (16)	0.0180 (14)
O2	0.0281 (19)	0.0287 (17)	0.0241 (16)	0.0080 (15)	0.0150 (14)	0.0039 (13)
O2W	0.0241 (19)	0.0321 (17)	0.0215 (16)	0.0081 (15)	0.0070 (13)	0.0039 (13)
O3	0.067 (3)	0.0275 (19)	0.055 (2)	0.018 (2)	0.035 (2)	0.0209 (18)
O4	0.045 (2)	0.0241 (17)	0.0375 (19)	0.0126 (17)	0.0136 (17)	0.0024 (15)
O5	0.0284 (18)	0.0129 (14)	0.0208 (15)	0.0011 (13)	0.0096 (13)	0.0029 (11)
O9	0.0192 (17)	0.0147 (14)	0.0288 (16)	0.0013 (13)	0.0027 (13)	0.0063 (12)
N1	0.031 (2)	0.025 (2)	0.0207 (19)	0.0084 (17)	0.0136 (17)	0.0089 (15)
N2	0.022 (2)	0.0199 (18)	0.0191 (18)	0.0048 (16)	0.0083 (15)	0.0085 (14)
C1	0.027 (3)	0.019 (2)	0.028 (2)	0.005 (2)	0.011 (2)	0.0102 (18)
C2	0.019 (2)	0.023 (2)	0.016 (2)	0.0047 (19)	0.0063 (17)	0.0045 (17)
C3	0.020 (2)	0.023 (2)	0.020 (2)	0.0026 (19)	0.0065 (18)	0.0074 (17)
C4	0.016 (2)	0.017 (2)	0.027 (2)	0.0037 (18)	0.0038 (18)	0.0054 (17)
C5	0.022 (3)	0.025 (2)	0.017 (2)	0.0078 (19)	0.0061 (18)	0.0011 (17)
C6	0.027 (3)	0.022 (2)	0.017 (2)	0.008 (2)	0.0038 (19)	0.0046 (17)
C7	0.019 (3)	0.026 (2)	0.028 (2)	0.003 (2)	0.0013 (19)	0.008 (2)
C8	0.015 (2)	0.017 (2)	0.018 (2)	0.0021 (17)	0.0017 (17)	0.0056 (16)
C9	0.019 (2)	0.018 (2)	0.014 (2)	0.0030 (18)	0.0041 (17)	0.0033 (16)
C10	0.020 (2)	0.016 (2)	0.016 (2)	0.0018 (18)	0.0057 (17)	0.0056 (16)
C11	0.018 (2)	0.018 (2)	0.015 (2)	0.0034 (18)	0.0038 (17)	0.0042 (16)
C12	0.023 (3)	0.023 (2)	0.015 (2)	0.0060 (19)	0.0040 (18)	0.0027 (17)
C13	0.017 (2)	0.016 (2)	0.0119 (19)	0.0015 (17)	0.0021 (16)	0.0009 (16)
C15	0.021 (2)	0.015 (2)	0.014 (2)	0.0039 (19)	0.0058 (17)	0.0000 (16)
O6	0.0315 (19)	0.0181 (15)	0.0161 (14)	0.0030 (14)	0.0113 (13)	0.0034 (12)
C14	0.025 (3)	0.017 (2)	0.019 (2)	0.0035 (19)	0.0048 (18)	0.0037 (17)
O7	0.058 (3)	0.0231 (17)	0.0228 (17)	0.0110 (17)	0.0220 (16)	0.0011 (13)
O10	0.0198 (18)	0.0157 (14)	0.0303 (16)	0.0015 (13)	0.0053 (13)	0.0041 (12)
O8	0.045 (2)	0.0196 (15)	0.0179 (15)	0.0103 (15)	0.0109 (14)	0.0071 (12)

Geometric parameters (Å, º) top

Tb1—O2	2.346 (3)	N2—C8	1.352 (5)
Tb1—O5	2.364 (3)	N2—C12	1.351 (5)
Tb1—O6ⁱ	2.365 (3)	N2—Ag1^iv	2.162 (4)
Tb1—O8ⁱⁱ	2.317 (3)	C1—C2	1.388 (6)
Tb1—O9	2.444 (3)	C1—H1	0.9300
Tb1—O10ⁱⁱⁱ	2.401 (3)	C2—C3	1.382 (6)
Tb1—O1W	2.421 (3)	C2—C6	1.494 (6)
Tb1—O2W	2.468 (3)	C3—C4	1.388 (6)
Ag1—N1	2.172 (4)	C3—H3	0.9300
Ag1—N2^iv	2.162 (4)	C4—C5	1.386 (6)
Ag1—O7^v	2.772 (3)	C4—C7	1.508 (6)
Ag1—O7^vi	2.859 (3)	C5—H5	0.9300
Ag1—Ag1^vii	3.2867 (12)	C8—C9	1.381 (6)
O1—C6	1.260 (5)	C8—H8	0.9300
O1W—H1W	0.8401	C9—C10	1.400 (6)
O1W—H2W	0.8400	C9—C13	1.500 (6)
O2—C6	1.263 (6)	C10—C11	1.391 (6)
O2W—H3W	0.8402	C10—H10	0.9300
O2W—H4W	0.8400	C11—C12	1.388 (6)
O3—C7	1.309 (6)	C11—C14	1.522 (6)
O3—H3A	0.90 (6)	C12—H12	0.9300
O4—C7	1.207 (5)	C13—O6	1.241 (5)
O5—C13	1.273 (5)	C15—O10	1.260 (5)
O9—C15	1.244 (5)	C15—C15ⁱⁱⁱ	1.535 (8)
N1—C5	1.343 (6)	C14—O7	1.244 (5)
N1—C1	1.348 (5)	C14—O8	1.262 (5)

O8ⁱⁱ—Tb1—O2	75.61 (11)	C8—N2—Ag1^iv	114.8 (3)
O8ⁱⁱ—Tb1—O6ⁱ	141.96 (11)	C12—N2—Ag1^iv	127.0 (3)
O2—Tb1—O6ⁱ	142.34 (10)	N1—C1—C2	122.6 (4)
O8ⁱⁱ—Tb1—O5	82.16 (11)	N1—C1—H1	118.7
O2—Tb1—O5	96.02 (11)	C2—C1—H1	118.7
O6ⁱ—Tb1—O5	89.03 (10)	C3—C2—C1	118.6 (4)
O8ⁱⁱ—Tb1—O10ⁱⁱⁱ	81.37 (10)	C3—C2—C6	120.7 (4)
O2—Tb1—O10ⁱⁱⁱ	109.81 (11)	C1—C2—C6	120.7 (4)
O6ⁱ—Tb1—O10ⁱⁱⁱ	85.00 (10)	C2—C3—C4	119.1 (4)
O5—Tb1—O10ⁱⁱⁱ	144.60 (10)	C2—C3—H3	120.5
O8ⁱⁱ—Tb1—O1W	135.70 (10)	C4—C3—H3	120.5
O2—Tb1—O1W	71.23 (11)	C5—C4—C3	119.0 (4)
O6ⁱ—Tb1—O1W	74.71 (10)	C5—C4—C7	120.2 (4)
O5—Tb1—O1W	73.14 (11)	C3—C4—C7	120.6 (4)
O10ⁱⁱⁱ—Tb1—O1W	137.38 (11)	N1—C5—C4	122.3 (4)
O8ⁱⁱ—Tb1—O9	125.23 (12)	N1—C5—H5	118.9
O2—Tb1—O9	75.56 (11)	C4—C5—H5	118.9
O6ⁱ—Tb1—O9	79.71 (11)	O1—C6—O2	124.7 (4)
O5—Tb1—O9	146.28 (10)	O1—C6—C2	118.4 (4)
O10ⁱⁱⁱ—Tb1—O9	66.38 (9)	O2—C6—C2	116.9 (4)
O1W—Tb1—O9	73.25 (11)	O4—C7—O3	126.2 (4)
O8ⁱⁱ—Tb1—O2W	73.67 (11)	O4—C7—C4	124.1 (4)
O2—Tb1—O2W	147.82 (10)	O3—C7—C4	109.6 (4)
O6ⁱ—Tb1—O2W	68.50 (10)	N2—C8—C9	122.3 (4)
O5—Tb1—O2W	70.60 (11)	N2—C8—H8	118.8
O10ⁱⁱⁱ—Tb1—O2W	74.76 (11)	C9—C8—H8	118.8
O1W—Tb1—O2W	127.82 (11)	C8—C9—C10	118.9 (4)
O9—Tb1—O2W	131.32 (10)	C8—C9—C13	120.7 (4)
N2^iv—Ag1—N1	164.83 (14)	C10—C9—C13	120.4 (4)
N2^iv—Ag1—Ag1^vii	108.80 (10)	C11—C10—C9	119.4 (4)
N1—Ag1—Ag1^vii	86.10 (10)	C11—C10—H10	120.3
N2^iv—Ag1—O7^v	93.85 (11)	C9—C10—H10	120.3
N1—Ag1—O7^v	92.40 (13)	C12—C11—C10	117.9 (4)
N1—Ag1—O7^vi	83.19 (11)	C12—C11—C14	122.0 (4)
N2^iv—Ag1—O7^vi	107.77 (11)	C10—C11—C14	120.1 (4)
O7^v—Ag1—O7^vi	108.60 (9)	N2—C12—C11	123.2 (4)
Tb1—O1W—H1W	113.8	N2—C12—H12	118.4
Tb1—O1W—H2W	134.5	C11—C12—H12	118.4
H1W—O1W—H2W	111.6	O6—C13—O5	124.4 (4)
C6—O2—Tb1	129.6 (3)	O6—C13—C9	118.5 (3)
Tb1—O2W—H3W	114.5	O5—C13—C9	117.1 (4)
Tb1—O2W—H4W	131.1	O9—C15—O10	126.9 (4)
H3W—O2W—H4W	111.7	O9—C15—C15ⁱⁱⁱ	117.3 (5)
C7—O3—H3A	113 (4)	O10—C15—C15ⁱⁱⁱ	115.7 (4)
C13—O5—Tb1	133.9 (3)	C13—O6—Tb1ⁱ	137.7 (3)
C15—O9—Tb1	118.8 (3)	O7—C14—O8	126.2 (4)
C5—N1—C1	118.3 (4)	O7—C14—C11	118.2 (4)
C5—N1—Ag1	125.6 (3)	O8—C14—C11	115.6 (4)
C1—N1—Ag1	116.1 (3)	C15—O10—Tb1ⁱⁱⁱ	120.5 (2)
C8—N2—C12	118.2 (4)	C14—O8—Tb1^viii	155.4 (3)

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

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O1W—H1W···O5ⁱ	0.84	2.08	2.820 (5)	147
O1W—H1W···O2Wⁱ	0.84	2.55	3.221 (5)	138
O1W—H2W···O9^ix	0.84	2.05	2.855 (4)	159
O2W—H3W···O10^x	0.84	2.13	2.839 (4)	142
O2W—H4W···O1^x	0.84	2.04	2.873 (5)	173
O3—H3A···O1^viii	0.90 (6)	1.71 (7)	2.554 (5)	154 (6)
C10—H10···O2W^viii	0.93	2.40	3.314 (6)	169

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

Experimental details

Crystal data
Chemical formula	[AgTb(C₇H₃NO₄)(C₇H₄NO₄)(C₂O₄)_0.5(H₂O)₂]
M_r	678.05
Crystal system, space group	Triclinic, P1
Temperature (K)	293
a, b, c (Å)	7.592 (3), 8.249 (3), 14.241 (6)
α, β, γ (°)	98.956 (4), 99.556 (4), 95.839 (5)
V (Å³)	861.3 (6)
Z	2
Radiation type	Mo Kα
µ (mm⁻¹)	5.29
Crystal size (mm)	0.30 × 0.24 × 0.19

Data collection
Diffractometer	Bruker APEXII CCD diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996)
T_min, T_max	0.251, 0.378
No. of measured, independent and observed [I > 2σ(I)] reflections	4416, 3032, 2862
R_int	0.018
(sin θ/λ)_max (Å⁻¹)	0.599

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.023, 0.062, 1.09
No. of reflections	3032
No. of parameters	284
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.85, −0.79

Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 1999), SHELXTL (Sheldrick, 2008).

Selected bond lengths (Å) top

Tb1—O2	2.346 (3)	Tb1—O1W	2.421 (3)
Tb1—O5	2.364 (3)	Tb1—O2W	2.468 (3)
Tb1—O6ⁱ	2.365 (3)	Ag1—N1	2.172 (4)
Tb1—O8ⁱⁱ	2.317 (3)	Ag1—N2^iv	2.162 (4)
Tb1—O9	2.444 (3)	Ag1—O7^v	2.772 (3)
Tb1—O10ⁱⁱⁱ	2.401 (3)	Ag1—O7^vi	2.859 (3)

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

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O1W—H1W···O5ⁱ	0.84	2.08	2.820 (5)	147
O1W—H1W···O2Wⁱ	0.84	2.55	3.221 (5)	138
O1W—H2W···O9^vii	0.84	2.05	2.855 (4)	159
O2W—H3W···O10^viii	0.84	2.13	2.839 (4)	142
O2W—H4W···O1^viii	0.84	2.04	2.873 (5)	173
O3—H3A···O1^ix	0.90 (6)	1.71 (7)	2.554 (5)	154 (6)
C10—H10···O2W^ix	0.93	2.40	3.314 (6)	169

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

Acknowledgements

The authors kindly acknowledge Zhao Qing University for supporting this work.

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