Poly[[tetra­aquatetrakis­[μ3-5-(pyridine-4-carboxamido)­isophthalato]cobalt(II)digadolinium(III)] tetra­hydrate]

Deng, Y.-F.; Chen, M.-S.; Zhang, C.-H.; Kuang, D.-Z.

doi:10.1107/S1600536811038074

metal-organic compounds

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ISSN: 2056-9890

Volume 67| Part 10| October 2011| Pages m1431-m1432

https://doi.org/10.1107/S1600536811038074

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Poly[[tetraaquatetrakis[μ₃-5-(pyridine-4-carboxamido)isophthalato]cobalt(II)digadolinium(III)] tetrahydrate]

Yi-Fang Deng,^a Man-Sheng Chen,^a ^* Chun-Hua Zhang ^a ^* and Dai-Zhi Kuang ^a

^aKey Laboratory of Functional Organometallic Materials, Hengyang Normal University, Department of Chemistry and Materials Science, Hengyang, Hunan 421008, People's Republic of China
^*Correspondence e-mail: cmsniu@163.com, zhangchunhua668@163.com

(Received 16 September 2011; accepted 18 September 2011; online 30 September 2011)

In the centrosymmetric polymeric title compound, {[CoGd₂(C₁₄H₈N₂O₅)₄(H₂O)₄]·4H₂O}_n, the Gd^III cation is coordinated by one water molecule and four pyridine-4-carboxamidoisophthalate (L) anions in a distorted square-antiprismatic arrangement, while the Co^II cation, located on an inversion center, is coordinated by two pyridyl-N atoms, two carboxylate-O atoms and two water molecules in a distorted octahedral geometry. The asymmetric unit contains two anionic L ligands: one bridges two Gd cations and one Co cation through two carboxyl groups and one pyridine-N atom; the other bridges two Gd cations and one Co cation through two carboxyl groups and the uncoordinated pyridine-N atom is hydrogen-bonded to the adjacent coordinated water molecule. Extensive O—H⋯O and N—H⋯O hydrogen bonds are present in the crystal structure.

Related literature

For related hetero-metallic complexes, see: Chen et al. (2011 ); Gu & Xue (2006 ); Liang et al. (2000 ); Prasad et al. (2007 ); Zhao et al. (2003 , 2004 ).

Experimental

Crystal data

[CoGd₂(C₁₄H₈N₂O₅)₄(H₂O)₄]·4H₂O
M_r = 1654.45
Triclinic, $[P \overline 1]$
a = 10.1457 (14) Å
b = 10.8728 (15) Å
c = 13.7552 (19) Å
α = 79.123 (2)°
β = 78.844 (3)°
γ = 86.317 (2)°
V = 1461.3 (3) Å³
Z = 1
Mo Kα radiation
μ = 2.62 mm⁻¹
T = 293 K
0.20 × 0.16 × 0.10 mm

Data collection

Bruker SMART 1000 CCD area-detector diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2001 ) T_min = 0.622, T_max = 0.779
7307 measured reflections
5053 independent reflections
4462 reflections with I > 2σ(I)
R_int = 0.045

Refinement

R[F² > 2σ(F²)] = 0.031
wR(F²) = 0.070
S = 1.00
5053 reflections
430 parameters
1 restraint
H-atom parameters constrained
Δρ_max = 1.23 e Å⁻³
Δρ_min = −0.88 e Å⁻³

Table 1
Selected bond lengths (Å)

Co1—O1	2.083 (3)
Co1—O1W	2.178 (4)
Co1—N4ⁱ	2.159 (4)
Gd1—O2	2.246 (3)
Gd1—O2W	2.365 (3)
Gd1—O3ⁱⁱ	2.436 (3)
Gd1—O4ⁱⁱ	2.420 (3)
Gd1—O6	2.487 (3)
Gd1—O7	2.408 (3)
Gd1—O8ⁱⁱⁱ	2.475 (3)
Gd1—O9ⁱⁱⁱ	2.382 (3)
Symmetry codes: (i) x, y, z-1; (ii) x, y-1, z; (iii) x-1, y, z.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O4W^iv	0.86	2.16	2.999 (6)	166
N3—H3⋯O4^v	0.86	2.15	2.942 (6)	152
O1W—H1WA⋯O6^vi	0.82	2.25	2.992 (5)	151
O1W—H1WB⋯O3W^vii	0.85	2.03	2.753 (6)	143
O2W—H2WA⋯O3W^viii	0.85	2.40	3.130 (6)	144
O2W—H2WB⋯N2ⁱ	0.85	1.92	2.676 (6)	147
O3W—H3WA⋯O3^vii	0.85	1.91	2.737 (6)	163
O3W—H3WB⋯O8ⁱⁱⁱ	0.85	1.97	2.781 (6)	160
O4W—H4WA⋯O9^ix	0.85	2.26	3.097 (6)	170
O4W—H4WB⋯O9^v	0.85	2.18	3.028 (6)	172
Symmetry codes: (i) x, y, z-1; (iii) x-1, y, z; (iv) -x+1, -y+1, -z+2; (v) -x+2, -y+1, -z+2; (vi) -x+2, -y+1, -z+1; (vii) -x+1, -y+1, -z+1; (viii) -x+1, -y, -z+1; (ix) x-1, y+1, z.

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

Supporting information

Crystal structure: contains datablocks global, I. DOI: https://doi.org/10.1107/S1600536811038074/xu5327sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811038074/xu5327Isup2.hkl

checkCIF report

Comment top

The rational synthesis and investigation of 3d-4f or 4d-4f hetero-metallic complexes are challenge for chemists and have attracted increasing attention in last few years since the competitive reaction containing 3d-4f metal ions in conjunction with ligands often result in formation of a mixture of homometallic assemblies rather than hetero-metallic analogous (Liang et al., 2000; Zhao et al., 2003; Zhao et al., 2004; Gu et al., 2006; Prasad et al., 2007). So we have recently prepared a new lanthanide(III)-transition metal(II) coordination polymer, [GdCo_0.5(H₂O)₂(L)₂]_n.2nH₂O, (I) through hydrothermal condition.

In the title compound, the central Gd^III ion is eight-coordinated by seven O atoms from four ligands and one water molecule, which forming a distorted square antiprismatic geometry(Fig. 1). It is interesting that the carboxyl groups of two unique L^2- ligands exhibit the different coordination modes: one coordinated to two Gd^III and one Co^II atoms using its two carboxylate groups with µ₁-η¹:η¹-chelate and µ₂-η¹:η¹-bis-monodentate coordination modes while the pyridyl group is free of coordination, the other one coordinated to two Gd^III through the carboxylate groups with µ₁-η¹:η¹-chelate coordination mode and one Co^II via the pyridyl group. Based on the coordination modes of the carboxylate and pyridyl groups of L^2- ligands, a complicated three-dimensional network is formed (Fig. 2), which is similar to the complex {[LnCo_0.5(INAIP)₂(H₂O)₂].2H₂O}_n (Chen, et al. 2011).

Related literature top

For related hetero-metallic complexes, see: Chen et al. (2011); Gu & Xue (2006); Liang et al. (2000); Prasad et al. (2007); Zhao et al. (2003, 2004).

Experimental top

A mixture of 0.05 mmol Gd(NO₃)₃.6H₂O (21.8 mg. 0.05 mmol), H₂L (28.6 mg, 0.1 mmol), Co(OAc)₂.4H₂O (13.1 mg, 0.05 mmol), NaOH (6.0 mg, 0.15 mmol), MeOH (4 ml) and H₂O (6 ml) was heated in a 16 mL capacity Teflon-lined reaction vessel at 433 K for 4 days, the reaction mixture was cooled to room temperature over a period of 40 h. The product was collected by filtration, washed with H₂O and air-dried.

Structure description top

For related hetero-metallic complexes, see: Chen et al. (2011); Gu & Xue (2006); Liang et al. (2000); Prasad et al. (2007); Zhao et al. (2003, 2004).

Computing details top

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

Figures top

	Fig. 1. The ORTEP drawing of the title compound (I). Displacement ellipsoids are drawn at 30% probability level. [Symmetry codes: (i) 2 - x, 1 - y, 1 - z (ii) 2 - x, 1 - y, 2 - z (iii) x, y, -1 + z (iv) x,-1 + y, z (v)-1 + x, y, z.]
	Fig. 2. Projection showing the three-dimensional structure of the compound.

Poly[[tetraaquatetrakis[µ₃-5-(pyridine-4- carboxamido)isophthalato]cobalt(II)digadolinium(III)] tetrahydrate] top

Crystal data top

[CoGd₂(C₁₄H₈N₂O₅)₄(H₂O)₄]·4H₂O	Z = 1
M_r = 1654.45	F(000) = 819
Triclinic, P1	D_x = 1.880 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 10.1457 (14) Å	Cell parameters from 5652 reflections
b = 10.8728 (15) Å	θ = 2.7–28.2°
c = 13.7552 (19) Å	µ = 2.62 mm⁻¹
α = 79.123 (2)°	T = 293 K
β = 78.844 (3)°	Block, pink
γ = 86.317 (2)°	0.20 × 0.16 × 0.10 mm
V = 1461.3 (3) Å³

Data collection top

Bruker SMART 1000 CCD area-detector diffractometer	5053 independent reflections
Radiation source: fine-focus sealed tube	4462 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.045
φ and ω scans	θ_max = 25.0°, θ_min = 2.1°
Absorption correction: multi-scan (SADABS; Bruker, 2001)	h = −12→10
T_min = 0.622, T_max = 0.779	k = −12→12
7307 measured reflections	l = −15→16

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)] = 0.031	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.070	H-atom parameters constrained
S = 1.00	w = 1/[σ²(F_o²) + (0.0217P)²] where P = (F_o² + 2F_c²)/3
5053 reflections	(Δ/σ)_max = 0.001
430 parameters	Δρ_max = 1.23 e Å⁻³
1 restraint	Δρ_min = −0.88 e Å⁻³

Crystal data top

[CoGd₂(C₁₄H₈N₂O₅)₄(H₂O)₄]·4H₂O	γ = 86.317 (2)°
M_r = 1654.45	V = 1461.3 (3) Å³
Triclinic, P1	Z = 1
a = 10.1457 (14) Å	Mo Kα radiation
b = 10.8728 (15) Å	µ = 2.62 mm⁻¹
c = 13.7552 (19) Å	T = 293 K
α = 79.123 (2)°	0.20 × 0.16 × 0.10 mm
β = 78.844 (3)°

Data collection top

Bruker SMART 1000 CCD area-detector diffractometer	5053 independent reflections
Absorption correction: multi-scan (SADABS; Bruker, 2001)	4462 reflections with I > 2σ(I)
T_min = 0.622, T_max = 0.779	R_int = 0.045
7307 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.031	1 restraint
wR(F²) = 0.070	H-atom parameters constrained
S = 1.00	Δρ_max = 1.23 e Å⁻³
5053 reflections	Δρ_min = −0.88 e Å⁻³
430 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
Co1	1.0000	0.5000	0.5000	0.0225 (2)
Gd1	0.68073 (2)	0.07754 (2)	0.702891 (17)	0.01596 (9)
C1	0.7021 (5)	0.4733 (4)	0.7262 (4)	0.0203 (11)
C2	0.6789 (5)	0.4174 (5)	0.8277 (3)	0.0204 (11)
H2	0.6736	0.3308	0.8458	0.024*
C3	0.6639 (4)	0.4907 (4)	0.9019 (3)	0.0193 (11)
C4	0.6653 (4)	0.6204 (4)	0.8743 (4)	0.0197 (11)
H4	0.6539	0.6703	0.9235	0.024*
C5	0.6838 (5)	0.6749 (4)	0.7734 (3)	0.0173 (11)
C6	0.7035 (5)	0.6027 (4)	0.6993 (4)	0.0209 (11)
H6	0.7176	0.6405	0.6317	0.025*
C7	0.6865 (5)	0.8143 (4)	0.7469 (4)	0.0193 (11)
C8	0.7333 (5)	0.3940 (5)	0.6454 (4)	0.0221 (11)
C9	0.6653 (5)	0.4830 (5)	1.0810 (4)	0.0290 (13)
C10	0.6520 (5)	0.4000 (5)	1.1831 (4)	0.0254 (12)
C11	0.6510 (5)	0.2702 (5)	1.2015 (4)	0.0302 (13)
H11	0.6536	0.2269	1.1489	0.036*
C12	0.6462 (5)	0.2065 (5)	1.2977 (4)	0.0354 (14)
H12	0.6463	0.1195	1.3083	0.042*
C13	0.6398 (6)	0.3854 (6)	1.3606 (4)	0.0395 (15)
H13	0.6347	0.4256	1.4152	0.047*
C14	0.6451 (6)	0.4584 (6)	1.2657 (4)	0.0356 (14)
H14	0.6442	0.5454	1.2574	0.043*
C15	1.0257 (5)	0.1207 (4)	0.8319 (4)	0.0196 (11)
C16	1.1577 (5)	0.1051 (4)	0.7839 (4)	0.0224 (11)
H16	1.1755	0.0884	0.7186	0.027*
C17	1.2619 (5)	0.1141 (5)	0.8325 (4)	0.0205 (11)
C18	1.2342 (5)	0.1428 (4)	0.9300 (4)	0.0219 (11)
H18	1.3043	0.1485	0.9634	0.026*
C19	1.1033 (5)	0.1625 (5)	0.9764 (4)	0.0222 (11)
C20	0.9992 (5)	0.1483 (5)	0.9280 (4)	0.0218 (11)
H20	0.9107	0.1574	0.9603	0.026*
C21	0.9089 (5)	0.1090 (4)	0.7833 (4)	0.0209 (11)
C22	1.4062 (5)	0.0983 (5)	0.7846 (4)	0.0230 (12)
C23	0.9939 (5)	0.2964 (5)	1.0919 (4)	0.0265 (12)
C24	0.9909 (5)	0.3393 (5)	1.1902 (4)	0.0257 (12)
C25	0.9824 (5)	0.2572 (5)	1.2814 (4)	0.0269 (12)
H25	0.9817	0.1711	1.2846	0.032*
C26	0.9752 (5)	0.3078 (5)	1.3671 (4)	0.0277 (13)
H26	0.9670	0.2532	1.4286	0.033*
C27	0.9848 (5)	0.5065 (5)	1.2779 (4)	0.0281 (13)
H27	0.9861	0.5923	1.2761	0.034*
C28	0.9885 (5)	0.4655 (5)	1.1898 (4)	0.0271 (12)
H28	0.9895	0.5225	1.1301	0.033*
N1	0.6472 (4)	0.4306 (4)	1.0036 (3)	0.0218 (10)
H1	0.6233	0.3539	1.0173	0.026*
N2	0.6415 (5)	0.2612 (5)	1.3771 (3)	0.0371 (12)
N3	1.0794 (4)	0.2000 (4)	1.0720 (3)	0.0239 (10)
H3	1.1204	0.1604	1.1183	0.029*
N4	0.9793 (4)	0.4299 (4)	1.3671 (3)	0.0246 (10)
O1	0.8077 (3)	0.4368 (3)	0.5644 (2)	0.0302 (9)
O2	0.6813 (4)	0.2877 (3)	0.6641 (3)	0.0322 (9)
O3	0.6714 (4)	0.8704 (3)	0.6616 (3)	0.0351 (10)
O4	0.7066 (4)	0.8773 (3)	0.8103 (3)	0.0358 (10)
O5	0.6911 (5)	0.5913 (4)	1.0738 (3)	0.0564 (13)
O6	0.9267 (3)	0.0946 (3)	0.6916 (3)	0.0312 (9)
O7	0.7925 (3)	0.1148 (3)	0.8335 (2)	0.0242 (8)
O8	1.4396 (3)	0.0994 (4)	0.6915 (3)	0.0301 (9)
O9	1.4954 (3)	0.0854 (4)	0.8378 (3)	0.0413 (11)
O10	0.9241 (4)	0.3512 (4)	1.0332 (3)	0.0392 (10)
O1W	0.9258 (4)	0.6827 (3)	0.4333 (3)	0.0329 (9)
H1WB	0.8653	0.7196	0.4704	0.039*
H1WA	0.9888	0.7243	0.3993	0.039*
O2W	0.7218 (4)	0.0952 (3)	0.5257 (3)	0.0404 (10)
H2WA	0.6782	0.0365	0.5148	0.048*
H2WB	0.6868	0.1627	0.4982	0.048*
O3W	0.3006 (4)	0.1662 (5)	0.5329 (3)	0.0747 (16)
H3WA	0.3248	0.1472	0.4746	0.090*
H3WB	0.3576	0.1389	0.5703	0.090*
O4W	0.4138 (5)	0.8385 (4)	0.9854 (3)	0.0680 (15)
H4WA	0.4328	0.9019	0.9390	0.082*
H4WB	0.4384	0.8526	1.0379	0.082*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Co1	0.0265 (6)	0.0248 (6)	0.0171 (5)	−0.0039 (4)	−0.0018 (4)	−0.0071 (4)
Gd1	0.01600 (14)	0.01569 (14)	0.01703 (14)	−0.00071 (9)	−0.00433 (10)	−0.00367 (9)
C1	0.021 (3)	0.020 (3)	0.020 (3)	−0.001 (2)	−0.004 (2)	−0.002 (2)
C2	0.021 (3)	0.017 (3)	0.020 (3)	−0.002 (2)	0.001 (2)	0.000 (2)
C3	0.013 (3)	0.025 (3)	0.018 (3)	0.001 (2)	−0.001 (2)	0.001 (2)
C4	0.016 (3)	0.022 (3)	0.022 (3)	0.001 (2)	−0.006 (2)	−0.004 (2)
C5	0.015 (3)	0.015 (3)	0.020 (3)	−0.003 (2)	−0.003 (2)	−0.001 (2)
C6	0.020 (3)	0.021 (3)	0.019 (3)	−0.002 (2)	−0.002 (2)	−0.001 (2)
C7	0.017 (3)	0.019 (3)	0.023 (3)	0.001 (2)	−0.006 (2)	−0.006 (2)
C8	0.021 (3)	0.020 (3)	0.025 (3)	0.003 (2)	−0.009 (2)	−0.002 (2)
C9	0.028 (3)	0.033 (3)	0.025 (3)	−0.002 (3)	−0.002 (2)	−0.002 (2)
C10	0.018 (3)	0.033 (3)	0.024 (3)	−0.002 (2)	−0.005 (2)	−0.001 (2)
C11	0.036 (3)	0.030 (3)	0.026 (3)	−0.006 (3)	−0.009 (3)	−0.001 (2)
C12	0.039 (4)	0.032 (3)	0.034 (3)	−0.011 (3)	−0.011 (3)	0.004 (3)
C13	0.047 (4)	0.054 (4)	0.020 (3)	0.004 (3)	−0.009 (3)	−0.012 (3)
C14	0.040 (4)	0.037 (4)	0.030 (3)	−0.002 (3)	−0.009 (3)	−0.004 (3)
C15	0.017 (3)	0.021 (3)	0.022 (3)	0.002 (2)	−0.006 (2)	−0.005 (2)
C16	0.024 (3)	0.026 (3)	0.017 (3)	0.001 (2)	−0.004 (2)	−0.006 (2)
C17	0.014 (3)	0.027 (3)	0.021 (3)	0.000 (2)	−0.005 (2)	−0.003 (2)
C18	0.018 (3)	0.025 (3)	0.026 (3)	−0.002 (2)	−0.010 (2)	−0.008 (2)
C19	0.021 (3)	0.026 (3)	0.022 (3)	−0.001 (2)	−0.003 (2)	−0.011 (2)
C20	0.017 (3)	0.026 (3)	0.024 (3)	0.001 (2)	−0.003 (2)	−0.010 (2)
C21	0.023 (3)	0.018 (3)	0.024 (3)	−0.001 (2)	−0.007 (2)	−0.007 (2)
C22	0.024 (3)	0.020 (3)	0.026 (3)	0.000 (2)	−0.005 (2)	−0.004 (2)
C23	0.021 (3)	0.035 (3)	0.026 (3)	−0.004 (2)	−0.003 (2)	−0.013 (3)
C24	0.016 (3)	0.042 (4)	0.022 (3)	0.000 (2)	−0.004 (2)	−0.011 (2)
C25	0.026 (3)	0.034 (3)	0.024 (3)	−0.001 (2)	−0.006 (2)	−0.012 (2)
C26	0.029 (3)	0.032 (3)	0.021 (3)	−0.009 (2)	−0.003 (2)	−0.002 (2)
C27	0.029 (3)	0.027 (3)	0.028 (3)	−0.003 (2)	−0.002 (3)	−0.007 (2)
C28	0.031 (3)	0.033 (3)	0.018 (3)	0.001 (2)	−0.005 (2)	−0.006 (2)
N1	0.025 (2)	0.018 (2)	0.019 (2)	−0.0009 (18)	−0.0032 (19)	0.0015 (18)
N2	0.043 (3)	0.042 (3)	0.026 (3)	−0.009 (2)	−0.010 (2)	0.003 (2)
N3	0.022 (2)	0.033 (3)	0.017 (2)	0.0036 (19)	−0.0085 (19)	−0.0049 (19)
N4	0.021 (2)	0.035 (3)	0.020 (2)	−0.004 (2)	−0.0025 (19)	−0.010 (2)
O1	0.030 (2)	0.039 (2)	0.021 (2)	−0.0097 (18)	0.0009 (17)	−0.0097 (17)
O2	0.048 (2)	0.016 (2)	0.033 (2)	−0.0053 (17)	−0.0041 (19)	−0.0062 (16)
O3	0.070 (3)	0.016 (2)	0.022 (2)	−0.0008 (18)	−0.015 (2)	−0.0015 (15)
O4	0.068 (3)	0.018 (2)	0.030 (2)	0.0048 (18)	−0.028 (2)	−0.0074 (16)
O5	0.113 (4)	0.028 (3)	0.034 (2)	−0.024 (3)	−0.023 (3)	−0.0009 (19)
O6	0.021 (2)	0.052 (3)	0.026 (2)	−0.0032 (17)	−0.0058 (17)	−0.0170 (18)
O7	0.0140 (19)	0.036 (2)	0.026 (2)	−0.0013 (15)	−0.0043 (16)	−0.0138 (16)
O8	0.0164 (19)	0.054 (3)	0.024 (2)	0.0013 (17)	−0.0044 (16)	−0.0168 (18)
O9	0.015 (2)	0.087 (3)	0.022 (2)	0.005 (2)	−0.0068 (17)	−0.010 (2)
O10	0.039 (2)	0.054 (3)	0.032 (2)	0.021 (2)	−0.016 (2)	−0.023 (2)
O1W	0.036 (2)	0.034 (2)	0.026 (2)	0.0018 (17)	0.0009 (17)	−0.0072 (17)
O2W	0.066 (3)	0.031 (2)	0.024 (2)	−0.005 (2)	−0.013 (2)	0.0016 (17)
O3W	0.060 (3)	0.132 (5)	0.031 (3)	0.028 (3)	−0.015 (2)	−0.014 (3)
O4W	0.139 (5)	0.037 (3)	0.030 (2)	−0.031 (3)	−0.015 (3)	−0.003 (2)

Geometric parameters (Å, º) top

Co1—O1ⁱ	2.083 (3)	C15—C16	1.389 (6)
Co1—O1	2.083 (3)	C15—C21	1.492 (6)
Co1—O1W	2.178 (4)	C16—C17	1.374 (6)
Co1—O1Wⁱ	2.178 (4)	C16—H16	0.9300
Co1—N4ⁱⁱ	2.159 (4)	C17—C18	1.406 (6)
Co1—N4ⁱⁱⁱ	2.159 (4)	C17—C22	1.498 (7)
Gd1—O2	2.246 (3)	C18—C19	1.380 (6)
Gd1—O2W	2.365 (3)	C18—H18	0.9300
Gd1—O3^iv	2.436 (3)	C19—C20	1.384 (7)
Gd1—O4^iv	2.420 (3)	C19—N3	1.421 (6)
Gd1—O6	2.487 (3)	C20—H20	0.9300
Gd1—O7	2.408 (3)	C21—O7	1.252 (5)
Gd1—O8^v	2.475 (3)	C21—O6	1.277 (5)
Gd1—O9^v	2.382 (3)	C22—O9	1.256 (6)
C1—C6	1.386 (6)	C22—O8	1.257 (6)
C1—C2	1.395 (6)	C23—O10	1.223 (6)
C1—C8	1.505 (7)	C23—N3	1.352 (6)
C2—C3	1.389 (7)	C23—C24	1.506 (7)
C2—H2	0.9300	C24—C28	1.369 (7)
C3—C4	1.390 (6)	C24—C25	1.387 (7)
C3—N1	1.410 (6)	C25—C26	1.380 (7)
C4—C5	1.385 (6)	C25—H25	0.9300
C4—H4	0.9300	C26—N4	1.331 (6)
C5—C6	1.378 (7)	C26—H26	0.9300
C5—C7	1.491 (6)	C27—N4	1.340 (6)
C6—H6	0.9300	C27—C28	1.361 (7)
C7—O3	1.250 (6)	C27—H27	0.9300
C7—O4	1.257 (5)	C28—H28	0.9300
C8—O1	1.246 (5)	N1—H1	0.8600
C8—O2	1.263 (6)	N3—H3	0.8600
C9—O5	1.204 (6)	N4—Co1^vi	2.159 (4)
C9—N1	1.345 (6)	O3—Gd1^vii	2.436 (3)
C9—C10	1.507 (7)	O4—Gd1^vii	2.420 (3)
C10—C11	1.387 (7)	O8—Gd1^viii	2.475 (3)
C10—C14	1.390 (7)	O9—Gd1^viii	2.382 (3)
C11—C12	1.365 (7)	O1W—H1WB	0.8501
C11—H11	0.9300	O1W—H1WA	0.8200
C12—N2	1.331 (7)	O2W—H2WA	0.8500
C12—H12	0.9300	O2W—H2WB	0.8499
C13—N2	1.326 (7)	O3W—H3WA	0.8515
C13—C14	1.387 (7)	O3W—H3WB	0.8500
C13—H13	0.9300	O4W—H4WA	0.8501
C14—H14	0.9300	O4W—H4WB	0.8501
C15—C20	1.382 (6)

O1ⁱ—Co1—O1	180.00 (19)	O5—C9—C10	118.3 (5)
O1ⁱ—Co1—N4ⁱⁱ	87.68 (14)	N1—C9—C10	117.4 (5)
O1—Co1—N4ⁱⁱ	92.32 (14)	C11—C10—C14	117.2 (5)
O1ⁱ—Co1—N4ⁱⁱⁱ	92.32 (14)	C11—C10—C9	125.6 (5)
O1—Co1—N4ⁱⁱⁱ	87.68 (14)	C14—C10—C9	117.2 (5)
N4ⁱⁱ—Co1—N4ⁱⁱⁱ	180.000 (1)	C12—C11—C10	119.3 (5)
O1ⁱ—Co1—O1W	86.75 (14)	C12—C11—H11	120.3
O1—Co1—O1W	93.25 (14)	C10—C11—H11	120.3
N4ⁱⁱ—Co1—O1W	90.98 (15)	N2—C12—C11	124.1 (5)
N4ⁱⁱⁱ—Co1—O1W	89.02 (15)	N2—C12—H12	117.9
O1ⁱ—Co1—O1Wⁱ	93.25 (14)	C11—C12—H12	117.9
O1—Co1—O1Wⁱ	86.75 (14)	N2—C13—C14	123.2 (5)
N4ⁱⁱ—Co1—O1Wⁱ	89.02 (15)	N2—C13—H13	118.4
N4ⁱⁱⁱ—Co1—O1Wⁱ	90.98 (15)	C14—C13—H13	118.4
O1W—Co1—O1Wⁱ	180.000 (1)	C13—C14—C10	119.2 (6)
O2—Gd1—O2W	82.58 (12)	C13—C14—H14	120.4
O2—Gd1—O9^v	91.01 (14)	C10—C14—H14	120.4
O2W—Gd1—O9^v	138.94 (13)	C20—C15—C16	119.9 (4)
O2—Gd1—O7	81.95 (12)	C20—C15—C21	117.8 (4)
O2W—Gd1—O7	139.26 (12)	C16—C15—C21	122.2 (4)
O9^v—Gd1—O7	78.76 (11)	C17—C16—C15	120.2 (4)
O2—Gd1—O4^iv	154.21 (12)	C17—C16—H16	119.9
O2W—Gd1—O4^iv	120.60 (12)	C15—C16—H16	119.9
O9^v—Gd1—O4^iv	78.54 (13)	C16—C17—C18	119.5 (4)
O7—Gd1—O4^iv	72.97 (12)	C16—C17—C22	122.6 (4)
O2—Gd1—O3^iv	152.78 (12)	C18—C17—C22	117.9 (4)
O2W—Gd1—O3^iv	71.09 (12)	C19—C18—C17	120.3 (4)
O9^v—Gd1—O3^iv	104.19 (13)	C19—C18—H18	119.9
O7—Gd1—O3^iv	122.72 (12)	C17—C18—H18	119.9
O4^iv—Gd1—O3^iv	52.79 (11)	C18—C19—C20	119.4 (4)
O2—Gd1—O8^v	85.71 (13)	C18—C19—N3	118.8 (4)
O2W—Gd1—O8^v	85.98 (12)	C20—C19—N3	121.8 (4)
O9^v—Gd1—O8^v	53.03 (11)	C15—C20—C19	120.6 (4)
O7—Gd1—O8^v	129.89 (11)	C15—C20—H20	119.7
O4^iv—Gd1—O8^v	105.71 (13)	C19—C20—H20	119.7
O3^iv—Gd1—O8^v	85.72 (13)	O7—C21—O6	120.2 (4)
O2—Gd1—O6	84.41 (13)	O7—C21—C15	119.0 (4)
O2W—Gd1—O6	87.95 (12)	O6—C21—C15	120.8 (4)
O9^v—Gd1—O6	131.92 (11)	O9—C22—O8	119.4 (5)
O7—Gd1—O6	53.19 (11)	O9—C22—C17	119.6 (4)
O4^iv—Gd1—O6	85.28 (13)	O8—C22—C17	121.0 (5)
O3^iv—Gd1—O6	100.97 (13)	O9—C22—Gd1^viii	57.6 (3)
O8^v—Gd1—O6	169.00 (12)	O8—C22—Gd1^viii	61.8 (3)
O2—Gd1—C22^v	87.78 (13)	C17—C22—Gd1^viii	176.5 (3)
O2W—Gd1—C22^v	112.54 (14)	O10—C23—N3	123.3 (5)
O9^v—Gd1—C22^v	26.43 (13)	O10—C23—C24	119.8 (5)
O7—Gd1—C22^v	104.25 (13)	N3—C23—C24	116.9 (5)
O4^iv—Gd1—C22^v	92.60 (14)	C28—C24—C25	118.8 (5)
O3^iv—Gd1—C22^v	95.88 (14)	C28—C24—C23	118.2 (5)
O8^v—Gd1—C22^v	26.61 (12)	C25—C24—C23	122.9 (5)
O6—Gd1—C22^v	156.94 (13)	C24—C25—C26	117.7 (5)
O2—Gd1—C7^iv	178.34 (13)	C24—C25—H25	121.2
O2W—Gd1—C7^iv	96.19 (13)	C26—C25—H25	121.2
O9^v—Gd1—C7^iv	90.65 (14)	N4—C26—C25	124.0 (5)
O7—Gd1—C7^iv	98.34 (13)	N4—C26—H26	118.0
O4^iv—Gd1—C7^iv	26.48 (12)	C25—C26—H26	118.0
O3^iv—Gd1—C7^iv	26.34 (12)	N4—C27—C28	123.6 (5)
O8^v—Gd1—C7^iv	95.32 (13)	N4—C27—H27	118.2
O6—Gd1—C7^iv	94.44 (13)	C28—C27—H27	118.2
C22^v—Gd1—C7^iv	93.72 (14)	C27—C28—C24	119.2 (5)
C6—C1—C2	119.9 (4)	C27—C28—H28	120.4
C6—C1—C8	119.6 (4)	C24—C28—H28	120.4
C2—C1—C8	120.5 (4)	C9—N1—C3	125.7 (4)
C3—C2—C1	120.2 (5)	C9—N1—H1	117.2
C3—C2—H2	119.9	C3—N1—H1	117.2
C1—C2—H2	119.9	C12—N2—C13	117.0 (5)
C2—C3—C4	119.5 (4)	C23—N3—C19	121.6 (4)
C2—C3—N1	118.7 (4)	C23—N3—H3	119.2
C4—C3—N1	121.8 (4)	C19—N3—H3	119.2
C5—C4—C3	119.7 (4)	C26—N4—C27	116.6 (4)
C5—C4—H4	120.2	C26—N4—Co1^vi	121.8 (3)
C3—C4—H4	120.2	C27—N4—Co1^vi	121.3 (3)
C6—C5—C4	121.2 (4)	C8—O1—Co1	144.0 (3)
C6—C5—C7	120.8 (4)	C8—O2—Gd1	155.3 (3)
C4—C5—C7	118.0 (4)	C7—O3—Gd1^vii	93.8 (3)
C5—C6—C1	119.5 (5)	C7—O4—Gd1^vii	94.4 (3)
C5—C6—H6	120.3	C21—O6—Gd1	91.1 (3)
C1—C6—H6	120.3	C21—O7—Gd1	95.4 (3)
O3—C7—O4	118.8 (4)	C22—O8—Gd1^viii	91.5 (3)
O3—C7—C5	121.0 (4)	C22—O9—Gd1^viii	96.0 (3)
O4—C7—C5	120.1 (4)	Co1—O1W—H1WB	117.3
O3—C7—Gd1^vii	59.9 (2)	Co1—O1W—H1WA	109.9
O4—C7—Gd1^vii	59.1 (3)	H1WB—O1W—H1WA	117.8
C5—C7—Gd1^vii	177.5 (3)	Gd1—O2W—H2WA	105.0
O1—C8—O2	123.9 (5)	Gd1—O2W—H2WB	110.8
O1—C8—C1	118.6 (4)	H2WA—O2W—H2WB	105.6
O2—C8—C1	117.5 (4)	H3WA—O3W—H3WB	111.2
O5—C9—N1	124.3 (5)	H4WA—O4W—H4WB	107.9

C6—C1—C2—C3	−3.2 (7)	O5—C9—N1—C3	4.4 (9)
C8—C1—C2—C3	173.3 (4)	C10—C9—N1—C3	−175.7 (4)
C1—C2—C3—C4	3.2 (7)	C2—C3—N1—C9	162.1 (5)
C1—C2—C3—N1	−176.9 (4)	C4—C3—N1—C9	−18.1 (7)
C2—C3—C4—C5	−1.0 (7)	C11—C12—N2—C13	0.8 (9)
N1—C3—C4—C5	179.2 (4)	C14—C13—N2—C12	−1.2 (9)
C3—C4—C5—C6	−1.3 (7)	O10—C23—N3—C19	5.8 (8)
C3—C4—C5—C7	−179.2 (4)	C24—C23—N3—C19	−171.8 (4)
C4—C5—C6—C1	1.3 (7)	C18—C19—N3—C23	132.4 (5)
C7—C5—C6—C1	179.2 (4)	C20—C19—N3—C23	−45.9 (7)
C2—C1—C6—C5	0.9 (7)	C25—C26—N4—C27	3.1 (7)
C8—C1—C6—C5	−175.7 (4)	C25—C26—N4—Co1^vi	−169.8 (4)
C6—C5—C7—O3	18.9 (7)	C28—C27—N4—C26	−1.1 (8)
C4—C5—C7—O3	−163.2 (5)	C28—C27—N4—Co1^vi	171.8 (4)
C6—C5—C7—O4	−159.9 (5)	O2—C8—O1—Co1	−118.9 (5)
C4—C5—C7—O4	18.0 (7)	C1—C8—O1—Co1	61.6 (7)
C6—C1—C8—O1	27.7 (7)	N4ⁱⁱ—Co1—O1—C8	−31.5 (6)
C2—C1—C8—O1	−148.9 (5)	N4ⁱⁱⁱ—Co1—O1—C8	148.5 (6)
C6—C1—C8—O2	−151.9 (5)	O1W—Co1—O1—C8	−122.6 (6)
C2—C1—C8—O2	31.5 (7)	O1Wⁱ—Co1—O1—C8	57.4 (6)
O5—C9—C10—C11	−165.6 (5)	O1—C8—O2—Gd1	75.0 (10)
N1—C9—C10—C11	14.5 (8)	C1—C8—O2—Gd1	−105.4 (8)
O5—C9—C10—C14	11.8 (8)	O2W—Gd1—O2—C8	−92.6 (8)
N1—C9—C10—C14	−168.1 (5)	O9^v—Gd1—O2—C8	128.1 (8)
C14—C10—C11—C12	−1.3 (8)	O7—Gd1—O2—C8	49.6 (8)
C9—C10—C11—C12	176.1 (5)	O4^iv—Gd1—O2—C8	62.9 (9)
C10—C11—C12—N2	0.4 (9)	O3^iv—Gd1—O2—C8	−107.1 (8)
N2—C13—C14—C10	0.4 (9)	O8^v—Gd1—O2—C8	−179.1 (8)
C11—C10—C14—C13	0.9 (8)	O6—Gd1—O2—C8	−4.0 (8)
C9—C10—C14—C13	−176.7 (5)	C22^v—Gd1—O2—C8	154.3 (8)
C20—C15—C16—C17	1.5 (7)	O4—C7—O3—Gd1^vii	−4.0 (5)
C21—C15—C16—C17	−178.6 (5)	C5—C7—O3—Gd1^vii	177.2 (4)
C15—C16—C17—C18	−1.8 (7)	O3—C7—O4—Gd1^vii	4.0 (5)
C15—C16—C17—C22	−179.9 (4)	C5—C7—O4—Gd1^vii	−177.2 (4)
C16—C17—C18—C19	−0.4 (7)	O7—C21—O6—Gd1	−3.4 (5)
C22—C17—C18—C19	177.8 (4)	C15—C21—O6—Gd1	177.4 (4)
C17—C18—C19—C20	2.8 (7)	O2—Gd1—O6—C21	86.0 (3)
C17—C18—C19—N3	−175.6 (4)	O2W—Gd1—O6—C21	168.7 (3)
C16—C15—C20—C19	1.0 (7)	O9^v—Gd1—O6—C21	−0.3 (4)
C21—C15—C20—C19	−178.9 (5)	O7—Gd1—O6—C21	1.9 (3)
C18—C19—C20—C15	−3.2 (8)	O4^iv—Gd1—O6—C21	−70.3 (3)
N3—C19—C20—C15	175.2 (4)	O3^iv—Gd1—O6—C21	−121.0 (3)
C20—C15—C21—O7	−5.5 (7)	O8^v—Gd1—O6—C21	112.2 (6)
C16—C15—C21—O7	174.6 (4)	C22^v—Gd1—O6—C21	15.2 (5)
C20—C15—C21—O6	173.8 (4)	C7^iv—Gd1—O6—C21	−95.2 (3)
C16—C15—C21—O6	−6.1 (7)	O6—C21—O7—Gd1	3.5 (5)
C16—C17—C22—O9	−167.4 (5)	C15—C21—O7—Gd1	−177.2 (4)
C18—C17—C22—O9	14.5 (7)	O2—Gd1—O7—C21	−91.0 (3)
C16—C17—C22—O8	13.5 (7)	O2W—Gd1—O7—C21	−22.3 (4)
C18—C17—C22—O8	−164.7 (5)	O9^v—Gd1—O7—C21	176.4 (3)
O10—C23—C24—C28	−41.3 (7)	O4^iv—Gd1—O7—C21	95.1 (3)
N3—C23—C24—C28	136.4 (5)	O3^iv—Gd1—O7—C21	76.6 (3)
O10—C23—C24—C25	134.8 (6)	O8^v—Gd1—O7—C21	−168.4 (3)
N3—C23—C24—C25	−47.5 (7)	O6—Gd1—O7—C21	−1.9 (3)
C28—C24—C25—C26	−1.5 (7)	C22^v—Gd1—O7—C21	−176.6 (3)
C23—C24—C25—C26	−177.5 (5)	C7^iv—Gd1—O7—C21	87.4 (3)
C24—C25—C26—N4	−1.8 (8)	O9—C22—O8—Gd1^viii	−1.6 (5)
N4—C27—C28—C24	−2.0 (8)	C17—C22—O8—Gd1^viii	177.6 (4)
C25—C24—C28—C27	3.3 (8)	O8—C22—O9—Gd1^viii	1.6 (5)
C23—C24—C28—C27	179.5 (5)	C17—C22—O9—Gd1^viii	−177.5 (4)

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

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N1—H1···O4W^ix	0.86	2.16	2.999 (6)	166
N3—H3···O4ⁱⁱ	0.86	2.15	2.942 (6)	152
O1W—H1WA···O6ⁱ	0.82	2.25	2.992 (5)	151
O1W—H1WB···O3W^x	0.85	2.03	2.753 (6)	143
O2W—H2WA···O3W^xi	0.85	2.40	3.130 (6)	144
O2W—H2WB···N2ⁱⁱⁱ	0.85	1.92	2.676 (6)	147
O3W—H3WA···O3^x	0.85	1.91	2.737 (6)	163
O3W—H3WB···O8^v	0.85	1.97	2.781 (6)	160
O4W—H4WA···O9^xii	0.85	2.26	3.097 (6)	170
O4W—H4WB···O9ⁱⁱ	0.85	2.18	3.028 (6)	172

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

Experimental details

Crystal data
Chemical formula	[CoGd₂(C₁₄H₈N₂O₅)₄(H₂O)₄]·4H₂O
M_r	1654.45
Crystal system, space group	Triclinic, P1
Temperature (K)	293
a, b, c (Å)	10.1457 (14), 10.8728 (15), 13.7552 (19)
α, β, γ (°)	79.123 (2), 78.844 (3), 86.317 (2)
V (Å³)	1461.3 (3)
Z	1
Radiation type	Mo Kα
µ (mm⁻¹)	2.62
Crystal size (mm)	0.20 × 0.16 × 0.10

Data collection
Diffractometer	Bruker SMART 1000 CCD area-detector
Absorption correction	Multi-scan (SADABS; Bruker, 2001)
T_min, T_max	0.622, 0.779
No. of measured, independent and observed [I > 2σ(I)] reflections	7307, 5053, 4462
R_int	0.045
(sin θ/λ)_max (Å⁻¹)	0.595

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.031, 0.070, 1.00
No. of reflections	5053
No. of parameters	430
No. of restraints	1
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	1.23, −0.88

Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXTL (Sheldrick, 2008).

Selected bond lengths (Å) top

Co1—O1	2.083 (3)	Gd1—O4ⁱⁱ	2.420 (3)
Co1—O1W	2.178 (4)	Gd1—O6	2.487 (3)
Co1—N4ⁱ	2.159 (4)	Gd1—O7	2.408 (3)
Gd1—O2	2.246 (3)	Gd1—O8ⁱⁱⁱ	2.475 (3)
Gd1—O2W	2.365 (3)	Gd1—O9ⁱⁱⁱ	2.382 (3)
Gd1—O3ⁱⁱ	2.436 (3)

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

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N1—H1···O4W^iv	0.86	2.16	2.999 (6)	166
N3—H3···O4^v	0.86	2.15	2.942 (6)	152
O1W—H1WA···O6^vi	0.82	2.25	2.992 (5)	151
O1W—H1WB···O3W^vii	0.85	2.03	2.753 (6)	143
O2W—H2WA···O3W^viii	0.85	2.40	3.130 (6)	144
O2W—H2WB···N2ⁱ	0.85	1.92	2.676 (6)	147
O3W—H3WA···O3^vii	0.85	1.91	2.737 (6)	163
O3W—H3WB···O8ⁱⁱⁱ	0.85	1.97	2.781 (6)	160
O4W—H4WA···O9^ix	0.85	2.26	3.097 (6)	170
O4W—H4WB···O9^v	0.85	2.18	3.028 (6)	172

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

Acknowledgements

This work was supported by the Open Fund Project of Key Laboratories in Hunan Universities (11 K009) and the Science Foundation of Hengyang Normal University of China (10B67).

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