(Heptanedioato-κ2O,O′)bis­(1,10-phenanthroline-κ2N,N′)zinc(II) hexa­hydrate

Lin, J.-L.; Wang, Y.-Y.

doi:10.1107/S1600536808006004

metal-organic compounds

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ISSN: 2056-9890

Volume 64| Part 4| April 2008| Pages m527-m528

doi:10.1107/S1600536808006004

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(Heptanedioato-κ²O,O′)bis(1,10-phenanthroline-κ²N,N′)zinc(II) hexahydrate

Jian-Li Lin ^a ^* and Yuan-Yuan Wang ^a

^aState Key Laboratory, Base of Novel Functional Materials and Preparation Science, Institute of Solid Materials Chemistry, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, People's Republic of China
^*Correspondence e-mail: leikeweipublic@hotmail.com

(Received 28 December 2007; accepted 4 March 2008; online 7 March 2008)

In the crystal structure of the title compound, [Zn(C₇H₁₀O₄)(C₁₂H₈N₂)₂]·6H₂O, the Zn^II atom is coordinated by two carboxylate O atoms of a mono-bidentate chelating pimelate anion (pimelic acid is heptanedioic acid) and four N atoms of two phenanthroline ligands, forming a considerably distorted octahedral ZnN₄O₂ coordination geometry. The complexes are assembled into a three-dimensional network via C—H⋯O, C—H⋯π and π–π interactions. The mean interplanar distance between adjacent phenanthroline ligands is 3.399 (2) Å.

Related literature

For related literature, see: Ge & Zheng (2005 ); Wei et al. (2002 ); Zheng (2004 ); Zheng, Kong & Chen (2003 ); Zheng, Lin & Kong (2003 ); Zheng et al. (2001 , 2002 ); Zheng & Ying (2004 ).

Experimental

Crystal data

[Zn(C₇H₁₀O₄)(C₁₂H₈N₂)₂]·6H₂O
M_r = 692.02
Monoclinic, P 2₁ /n
a = 9.2050 (18) Å
b = 21.241 (4) Å
c = 16.598 (3) Å
β = 96.48 (3)°
V = 3224.6 (11) Å³
Z = 4
Mo Kα radiation
μ = 0.82 mm⁻¹
T = 296 (2) K
0.43 × 0.26 × 0.22 mm

Data collection

Bruker P4 diffractometer
Absorption correction: ψ scan (North et al., 1968 ) T_min = 0.697, T_max = 0.834
9226 measured reflections
7393 independent reflections
3956 reflections with I > 2σ(I)
R_int = 0.043
3 standard reflections every 97 reflections intensity decay: no

Refinement

R[F² > 2σ(F²)] = 0.059
wR(F²) = 0.117
S = 1.01
7393 reflections
453 parameters
18 restraints
H atoms treated by a mixture of independent and constrained refinement
Δρ_max = 0.34 e Å⁻³
Δρ_min = −0.29 e Å⁻³

Table 1
Selected geometric parameters (Å, °)

Zn—N4	2.128 (3)
Zn—N3	2.129 (3)
Zn—N2	2.148 (3)
Zn—N1	2.167 (3)
Zn—O1	2.178 (3)
Zn—O2	2.224 (3)

N4—Zn—N3	78.26 (11)
N4—Zn—N2	99.28 (11)
N3—Zn—N2	168.21 (11)
N4—Zn—N1	109.01 (11)
N3—Zn—N1	92.26 (11)
N2—Zn—N1	77.55 (11)
N4—Zn—O1	102.80 (10)
N3—Zn—O1	104.68 (10)
N2—Zn—O1	87.11 (10)
N1—Zn—O1	146.42 (10)
N4—Zn—O2	156.42 (10)
N3—Zn—O2	90.89 (10)
N2—Zn—O2	95.35 (10)
N1—Zn—O2	92.10 (10)
O1—Zn—O2	59.45 (9)

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O5—H5A⋯O8ⁱ	0.84 (2)	1.95 (2)	2.776 (5)	165 (5)
O5—H5B⋯O10	0.84 (4)	1.90 (4)	2.733 (6)	170 (4)
O6—H6A⋯O4ⁱⁱ	0.85 (4)	2.02 (2)	2.861 (5)	176 (3)
O6—H6B⋯O7	0.83 (3)	2.16 (3)	2.985 (5)	170 (3)
O7—H7A⋯O5	0.85 (3)	1.89 (3)	2.734 (5)	176 (5)
O7—H7B⋯O2ⁱⁱⁱ	0.86 (2)	1.97 (2)	2.828 (4)	174 (5)
O8—H8A⋯O9	0.85 (3)	1.96 (3)	2.804 (4)	172 (4)
O8—H8B⋯O4ⁱⁱ	0.85 (3)	1.99 (3)	2.832 (4)	173 (3)
O9—H9A⋯O7	0.84 (4)	1.95 (2)	2.789 (4)	175 (4)
O9—H9B⋯O3^iv	0.85 (3)	1.89 (3)	2.736 (4)	173 (4)
O10—H10A⋯O3^iv	0.86 (2)	1.88 (4)	2.732 (4)	171 (4)
O10—H10B⋯O1	0.85 (3)	2.11 (3)	2.957 (4)	176 (4)
C2—H2⋯O9^v	0.93	2.53	3.429 (5)	162
C5—H5⋯O2^vi	0.93	2.55	3.381 (4)	149
C17—H17⋯O1^vii	0.93	2.59	3.263 (4)	129
C18—H18⋯O6^iv	0.93	2.50	3.344 (5)	151
C26—H26B⋯Cg1ⁱ	0.97	2.99	3.791 (4)	140
C27—H27A⋯Cg2ⁱ	0.97	2.82	3.375 (4)	117
Symmetry codes: (i) x-1, y, z; (ii) x+1, y, z; (iii) $[-x+{\script{1\over 2}}, y+{\script{1\over 2}}, -z+{\script{3\over 2}}]$ ; (iv) $[x+{\script{1\over 2}}, -y+{\script{1\over 2}}, z-{\script{1\over 2}}]$ ; (v) $[-x+{\script{3\over 2}}, y-{\script{1\over 2}}, -z+{\script{3\over 2}}]$ ; (vi) -x+1, -y, -z+2; (vii) -x+1, -y, -z+1. Cg1 and Cg2 are the centroids of the C16–C19/C23/C24 and C23/C19–C22/N4 rings, respectively.

Data collection: XSCANS (Siemens, 1996 ); cell refinement: XSCANS; data reduction: XSCANS; 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 datablocks global, I. DOI: 10.1107/S1600536808006004/is2271sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536808006004/is2271Isup2.hkl

checkCIF report

Comment top

Previous investigation on self-assembly of metal ions, hetroaromatic N-donor ligands and pimelate anions exhibits various coordinating modes of pimelate anions. For example, pimelate anion bridges two metal ions in bis-monodentate fashion (Zheng, Lin et al., 2003; Ge & Zheng, 2005; Zheng & Ying, 2004), in chelting/monodentate fashion (Zheng, 2004) and in bis-chelaing fashion (Zheng, Kong et al., 2003). When bridging three metal ions, pimelate anion can offer one carboxylate monoatomically to bridge two metal ions and the other end monodentately to coordinate one metal ion (Zheng et al., 2001; Ge & Zheng, 2005). Furthermore, pimelate anion can bischelate two Cd atoms with one oxygen bonded to additional Cd atom to bridge three metal atoms to form polymeric chains (Zheng et al., 2002). To the best of our knowledge, the title Zn compound represents a new example with pimelate anion coordinating one metal atom in a chelating fashion.

The title compound consists of [Zn(phen)₂(C₇H₁₀O₄)] complex and hydrogen bonded H₂O molecules. As demonstrated in Fig.1, the Zn atom in the complex cation is coordinated by two carboxylato oxygen atoms of one mono-chelating pimelate (C₇H₁₀O₄)^2- anion and four nitrogen atoms of two phenanthroline (phen) ligands to define a considerably distorted octahedral ZnN₄O₂ chromophore. Two phen ligands chelating the central Zn atom form V-shaped cleft and the mono-chelating pimelato ligand is twisted at the carbon atom next to the chelating carboxylato end to adopt a gauche conformation around the C26—C27 bond. The present complex looks very like the monovalent [Zn(phen)₂(C₈H₁₃O₄)]⁺ complex cation found in the earlier-reported [Zn(phen)₂(C₈H₁₃O₄)](NO₃).H₂O, where the Zn atoms are coordinated by two phen ligands and one hydrogen suberate (C₈H₁₃O₄)^- anion (Wei et al., 2002).

Along [001] direction, the complex are arranged with the clefts orientating alternatively up- and downwards and the symmetry-related phen ligands orientate anti-parallelly to each other and the mean interplanar distance of 3.399 (2) Å suggests that the N-donor ligands are engaged in intercationic π-π stacking interactions. In this sense, the complex cations are, via π-π stacking interactions, assembled into one-dimensional chains extending parallel to [001] and careful inspection indicates that the resulting chains are stabilized by intercationic C5—H5···O2 hydrogen bonds. In the (011) plane, the chains are so arranged that the twisted pimelato ligands are located in the clefts of the adjacent chains and the alkyl C—H bonds are directed to the phen plane (C1 to C12) to form C—H···π interactions. According to the above description, supramolecular assembly of the complex cations into two-dimensional layers (Fig. 2) is achieved due to intercationic π-π, C—H···O and C—H···π interactions. The lattice H₂O molecules are sandwiched between the cationic layers and form hydrogen bonded anionic chains propagating along [100]. The water molecules except the O5 one are hydrogen-bonded to the carboxylate O atoms.

Related literature top

For related literature, see: Ge & Zheng (2005); Wei et al. (2002); Zheng (2004); Zheng, Kong & Chen (2003); Zheng, Lin & Kong (2003); Zheng et al. (2001, 2002); Zheng & Ying (2004).

Experimental top

NaOH (2.0 ml, 1 M) was dropwise added to a stirred solution of Zn(NO₃)₂.6H₂O (0.295 g, 0.99 mmol) in H₂O (5.0 ml) to produce white precipitate, which was separated by centrifugation and washed with deionized water for several times. The fresh precipitate was moved to a solution of phenanthroline monohydrate (0.200 g, 1.0 mmol) and pimelic acid (0.162 g, 1.0 mmol) in CH₃OH/H₂O (1:1 v/v; 20 ml), and then NaOH (0.5 ml, 1 M) was dropwise added. The resulting suspension was filtered out and the colorless filtrate (pH = 8.57) was allowed to stand at room temperature and slow evaporation for several weeks afforded a mixture of prismatic colorless crystals of [Zn(C₁₂H₈N₂)₂(C₇H₁₀O₄)].6H₂O and plate-like colorless crystals. The former crystals are stable, and the latter are found to easily deteriorate upon isolation from the mother liquor.

Computing details top

Data collection: XSCANS (Siemens, 1996); cell refinement: XSCANS (Siemens, 1996); data reduction: XSCANS (Siemens, 1996); 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 molecular structure of the Zn^II complex, showing 30% probability displacement ellipsoids and the atom-numbering scheme.
	Fig. 2. A view of a single layer of (I). H atoms and water molecules have been omitted.

(Heptanedioato-κ²O,O')bis(1,10-phenanthroline-κ²N,N')zinc(II) hexahydrate top

Crystal data top

[Zn(C₇H₁₀O₄)(C₁₂H₈N₂)₂]·6H₂O	F(000) = 1448
M_r = 692.02	D_x = 1.425 Mg m⁻³
Monoclinic, P2₁/n	Melting point: 163 K
Hall symbol: -P 2yn	Mo Kα radiation, λ = 0.71073 Å
a = 9.2050 (18) Å	Cell parameters from 25 reflections
b = 21.241 (4) Å	θ = 5–12.5°
c = 16.598 (3) Å	µ = 0.82 mm⁻¹
β = 96.48 (3)°	T = 296 K
V = 3224.6 (11) Å³	Block, colourless
Z = 4	0.43 × 0.26 × 0.22 mm

Data collection top

Bruker P4 diffractometer	3956 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	R_int = 0.043
Graphite monochromator	θ_max = 27.5°, θ_min = 1.6°
θ/2θ scans	h = −11→1
Absorption correction: ψ scan (North et al., 1968)	k = −1→27
T_min = 0.697, T_max = 0.834	l = −21→21
9226 measured reflections	3 standard reflections every 97 reflections
7393 independent reflections	intensity decay: no

Refinement top

Refinement on F²	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.059	H atoms treated by a mixture of independent and constrained refinement
wR(F²) = 0.117	w = 1/[σ²(F_o²) + (0.0346P)² + 1.0334P] where P = (F_o² + 2F_c²)/3
S = 1.01	(Δ/σ)_max = 0.001
7393 reflections	Δρ_max = 0.34 e Å⁻³
453 parameters	Δρ_min = −0.29 e Å⁻³
18 restraints	Extinction correction: SHELXL97 (Sheldrick, 2008), Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
Primary atom site location: structure-invariant direct methods	Extinction coefficient: 0.00132 (18)

Crystal data top

[Zn(C₇H₁₀O₄)(C₁₂H₈N₂)₂]·6H₂O	V = 3224.6 (11) Å³
M_r = 692.02	Z = 4
Monoclinic, P2₁/n	Mo Kα radiation
a = 9.2050 (18) Å	µ = 0.82 mm⁻¹
b = 21.241 (4) Å	T = 296 K
c = 16.598 (3) Å	0.43 × 0.26 × 0.22 mm
β = 96.48 (3)°

Data collection top

Bruker P4 diffractometer	3956 reflections with I > 2σ(I)
Absorption correction: ψ scan (North et al., 1968)	R_int = 0.043
T_min = 0.697, T_max = 0.834	3 standard reflections every 97 reflections
9226 measured reflections	intensity decay: no
7393 independent reflections

Refinement top

R[F² > 2σ(F²)] = 0.059	18 restraints
wR(F²) = 0.117	H atoms treated by a mixture of independent and constrained refinement
S = 1.01	Δρ_max = 0.34 e Å⁻³
7393 reflections	Δρ_min = −0.29 e Å⁻³
453 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
Zn	0.45796 (4)	0.04742 (2)	0.72867 (2)	0.03662 (14)
N1	0.6065 (3)	0.00835 (14)	0.82659 (17)	0.0385 (7)
N2	0.4468 (3)	0.11526 (14)	0.82373 (17)	0.0396 (7)
C1	0.6859 (4)	−0.04345 (19)	0.8282 (2)	0.0484 (9)
H1	0.6865	−0.0662	0.7804	0.058*
C2	0.7686 (5)	−0.0660 (2)	0.8973 (3)	0.0619 (12)
H2	0.8243	−0.1024	0.8952	0.074*
C3	0.7668 (5)	−0.0338 (2)	0.9682 (3)	0.0629 (12)
H3	0.8202	−0.0486	1.0153	0.075*
C4	0.6848 (4)	0.02125 (19)	0.9703 (2)	0.0486 (10)
C5	0.6771 (5)	0.0579 (2)	1.0425 (2)	0.0644 (13)
H5	0.7280	0.0448	1.0911	0.077*
C6	0.5972 (5)	0.1109 (2)	1.0404 (2)	0.0654 (13)
H6	0.5950	0.1339	1.0878	0.079*
C7	0.5155 (4)	0.13299 (19)	0.9674 (2)	0.0478 (10)
C8	0.4325 (5)	0.1880 (2)	0.9616 (3)	0.0614 (12)
H8	0.4282	0.2131	1.0072	0.074*
C9	0.3580 (5)	0.20512 (19)	0.8897 (3)	0.0575 (11)
H9	0.3010	0.2414	0.8859	0.069*
C10	0.3680 (4)	0.16756 (19)	0.8216 (2)	0.0513 (10)
H10	0.3171	0.1798	0.7725	0.062*
C11	0.5207 (4)	0.09748 (17)	0.8962 (2)	0.0405 (9)
C12	0.6062 (4)	0.04080 (17)	0.8974 (2)	0.0394 (9)
N3	0.5138 (3)	−0.02261 (14)	0.64572 (17)	0.0359 (7)
N4	0.5801 (3)	0.10061 (13)	0.65101 (16)	0.0339 (7)
C13	0.4767 (4)	−0.08320 (19)	0.6419 (2)	0.0479 (10)
H13	0.4083	−0.0977	0.6747	0.058*
C14	0.5360 (4)	−0.12543 (18)	0.5911 (2)	0.0474 (10)
H14	0.5051	−0.1671	0.5891	0.057*
C15	0.6391 (4)	−0.10603 (18)	0.5445 (2)	0.0455 (10)
H15	0.6815	−0.1345	0.5115	0.055*
C16	0.6810 (4)	−0.04252 (17)	0.54645 (18)	0.0357 (8)
C17	0.7875 (4)	−0.01760 (19)	0.4982 (2)	0.0458 (10)
H17	0.8350	−0.0444	0.4654	0.055*
C18	0.8192 (4)	0.0444 (2)	0.4999 (2)	0.0451 (9)
H18	0.8873	0.0599	0.4676	0.054*
C19	0.7503 (4)	0.08676 (17)	0.5505 (2)	0.0366 (8)
C20	0.7791 (4)	0.15174 (18)	0.5536 (2)	0.0471 (10)
H20	0.8472	0.1691	0.5227	0.057*
C21	0.7055 (5)	0.18921 (19)	0.6029 (2)	0.0542 (11)
H21	0.7200	0.2326	0.6036	0.065*
C22	0.6091 (4)	0.16208 (17)	0.6518 (2)	0.0444 (9)
H22	0.5632	0.1879	0.6865	0.053*
C23	0.6491 (3)	0.06355 (16)	0.60015 (19)	0.0320 (8)
C24	0.6144 (3)	−0.00242 (16)	0.59791 (18)	0.0293 (8)
O1	0.2329 (3)	0.07270 (12)	0.68624 (14)	0.0445 (6)
O2	0.2732 (3)	−0.01112 (12)	0.76159 (15)	0.0468 (7)
C25	0.1853 (4)	0.02656 (18)	0.7233 (2)	0.0386 (9)
C26	0.0227 (4)	0.01661 (18)	0.7220 (2)	0.0451 (10)
H26A	0.0056	−0.0170	0.7594	0.054*
H26B	−0.0172	0.0034	0.6680	0.054*
C27	−0.0573 (4)	0.07532 (18)	0.7449 (2)	0.0463 (10)
H27A	−0.1616	0.0672	0.7362	0.056*
H27B	−0.0365	0.1091	0.7086	0.056*
C28	−0.0188 (4)	0.09761 (17)	0.8318 (2)	0.0427 (9)
H28A	−0.0387	0.0641	0.8687	0.051*
H28B	0.0849	0.1070	0.8408	0.051*
C29	−0.1048 (4)	0.15551 (18)	0.8501 (2)	0.0474 (10)
H29A	−0.0795	0.1893	0.8149	0.057*
H29B	−0.2079	0.1466	0.8365	0.057*
C30	−0.0816 (4)	0.17858 (18)	0.9365 (2)	0.0497 (10)
H30A	0.0187	0.1929	0.9476	0.060*
H30B	−0.0934	0.1431	0.9720	0.060*
C31	−0.1816 (4)	0.23129 (17)	0.9587 (2)	0.0424 (9)
O3	−0.1667 (3)	0.24772 (12)	1.03240 (15)	0.0561 (7)
O4	−0.2700 (3)	0.25491 (12)	0.90506 (16)	0.0518 (7)
O5	0.0621 (4)	0.29022 (19)	0.7220 (3)	0.0979 (13)
H5A	−0.029 (2)	0.294 (2)	0.722 (3)	0.117*
H5B	0.082 (5)	0.2586 (18)	0.695 (3)	0.117*
O6	0.5105 (4)	0.35021 (17)	0.9056 (2)	0.0760 (10)
H6A	0.577 (4)	0.3225 (18)	0.908 (2)	0.091*
H6B	0.463 (4)	0.351 (2)	0.8597 (16)	0.091*
O7	0.3106 (3)	0.36089 (15)	0.7516 (2)	0.0664 (9)
H7A	0.234 (3)	0.3389 (15)	0.740 (3)	0.080*
H7B	0.286 (4)	0.3996 (9)	0.744 (3)	0.080*
O8	0.7737 (3)	0.30601 (17)	0.75204 (18)	0.0672 (9)
H8A	0.694 (3)	0.312 (2)	0.7220 (19)	0.081*
H8B	0.754 (4)	0.289 (2)	0.7958 (15)	0.081*
O9	0.5085 (3)	0.31376 (16)	0.65131 (18)	0.0663 (9)
H9A	0.453 (4)	0.3297 (19)	0.683 (2)	0.080*
H9B	0.456 (4)	0.2967 (19)	0.6116 (18)	0.080*
O10	0.1348 (4)	0.19689 (15)	0.6205 (2)	0.0749 (10)
H10A	0.196 (4)	0.2109 (18)	0.589 (2)	0.090*
H10B	0.166 (5)	0.1614 (13)	0.638 (3)	0.090*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Zn	0.0340 (2)	0.0411 (3)	0.0360 (2)	0.0035 (2)	0.00918 (16)	−0.0029 (2)
N1	0.0361 (17)	0.0382 (18)	0.0412 (18)	−0.0007 (15)	0.0050 (14)	−0.0012 (15)
N2	0.0360 (17)	0.0397 (18)	0.0446 (19)	−0.0014 (15)	0.0117 (15)	−0.0034 (15)
C1	0.050 (2)	0.044 (2)	0.050 (2)	0.005 (2)	0.0023 (19)	0.003 (2)
C2	0.055 (3)	0.059 (3)	0.070 (3)	0.017 (2)	−0.001 (2)	0.016 (2)
C3	0.062 (3)	0.069 (3)	0.055 (3)	−0.002 (3)	−0.008 (2)	0.016 (2)
C4	0.049 (2)	0.052 (3)	0.043 (2)	−0.011 (2)	−0.0036 (19)	0.006 (2)
C5	0.071 (3)	0.080 (4)	0.041 (2)	−0.012 (3)	−0.001 (2)	0.003 (2)
C6	0.081 (3)	0.076 (3)	0.040 (3)	−0.023 (3)	0.010 (2)	−0.019 (2)
C7	0.053 (2)	0.048 (3)	0.044 (2)	−0.014 (2)	0.012 (2)	−0.0103 (19)
C8	0.072 (3)	0.050 (3)	0.066 (3)	−0.006 (2)	0.020 (3)	−0.029 (2)
C9	0.056 (3)	0.041 (2)	0.078 (3)	0.006 (2)	0.018 (2)	−0.015 (2)
C10	0.047 (2)	0.048 (3)	0.060 (3)	0.002 (2)	0.010 (2)	−0.006 (2)
C11	0.038 (2)	0.043 (2)	0.041 (2)	−0.0112 (19)	0.0085 (18)	−0.0016 (18)
C12	0.041 (2)	0.040 (2)	0.038 (2)	−0.0066 (19)	0.0083 (17)	0.0002 (18)
N3	0.0355 (17)	0.0338 (17)	0.0385 (17)	0.0038 (14)	0.0044 (14)	−0.0020 (13)
N4	0.0336 (16)	0.0360 (18)	0.0329 (16)	0.0057 (14)	0.0078 (13)	−0.0007 (14)
C13	0.043 (2)	0.049 (3)	0.053 (3)	−0.002 (2)	0.010 (2)	0.004 (2)
C14	0.050 (2)	0.037 (2)	0.054 (2)	0.003 (2)	0.000 (2)	−0.005 (2)
C15	0.051 (2)	0.045 (2)	0.039 (2)	0.010 (2)	0.0009 (19)	−0.0086 (18)
C16	0.0365 (19)	0.044 (2)	0.0256 (17)	0.0073 (19)	−0.0020 (15)	−0.0029 (17)
C17	0.054 (2)	0.053 (3)	0.033 (2)	0.011 (2)	0.0116 (18)	−0.0075 (18)
C18	0.047 (2)	0.058 (3)	0.0324 (19)	0.006 (2)	0.0126 (17)	0.003 (2)
C19	0.035 (2)	0.045 (2)	0.0300 (19)	0.0011 (18)	0.0048 (16)	0.0051 (17)
C20	0.051 (2)	0.047 (2)	0.045 (2)	0.000 (2)	0.0145 (19)	0.005 (2)
C21	0.066 (3)	0.036 (2)	0.063 (3)	−0.006 (2)	0.020 (2)	0.002 (2)
C22	0.050 (2)	0.037 (2)	0.047 (2)	0.0023 (19)	0.0128 (19)	−0.0064 (18)
C23	0.0281 (18)	0.040 (2)	0.0274 (18)	0.0062 (16)	0.0009 (15)	0.0012 (15)
C24	0.0280 (18)	0.036 (2)	0.0229 (17)	0.0040 (16)	0.0006 (14)	−0.0008 (15)
O1	0.0456 (15)	0.0491 (16)	0.0402 (14)	−0.0004 (13)	0.0104 (12)	−0.0003 (13)
O2	0.0367 (14)	0.0506 (17)	0.0530 (16)	0.0073 (13)	0.0044 (12)	−0.0009 (13)
C25	0.038 (2)	0.047 (2)	0.033 (2)	−0.0004 (19)	0.0100 (17)	−0.0141 (18)
C26	0.033 (2)	0.053 (2)	0.050 (2)	−0.0004 (19)	0.0042 (17)	−0.013 (2)
C27	0.037 (2)	0.055 (2)	0.046 (2)	0.0071 (19)	0.0028 (18)	−0.0063 (19)
C28	0.034 (2)	0.051 (2)	0.043 (2)	0.0076 (19)	0.0055 (17)	−0.0003 (19)
C29	0.045 (2)	0.045 (2)	0.053 (2)	0.0041 (19)	0.0102 (19)	−0.003 (2)
C30	0.049 (2)	0.051 (3)	0.049 (2)	0.009 (2)	0.0070 (19)	−0.004 (2)
C31	0.046 (2)	0.032 (2)	0.052 (3)	0.0022 (19)	0.018 (2)	−0.0001 (19)
O3	0.075 (2)	0.0500 (17)	0.0447 (17)	0.0128 (16)	0.0137 (15)	−0.0042 (14)
O4	0.0510 (17)	0.0512 (17)	0.0543 (17)	0.0130 (14)	0.0110 (14)	0.0012 (14)
O5	0.076 (2)	0.083 (3)	0.145 (4)	−0.020 (2)	0.054 (3)	−0.036 (2)
O6	0.073 (2)	0.078 (2)	0.077 (2)	0.0225 (19)	0.0106 (18)	−0.023 (2)
O7	0.0578 (19)	0.060 (2)	0.083 (2)	0.0079 (16)	0.0120 (18)	−0.0120 (19)
O8	0.055 (2)	0.095 (3)	0.0522 (18)	0.0039 (19)	0.0068 (15)	0.0066 (18)
O9	0.0517 (19)	0.083 (2)	0.064 (2)	0.0020 (17)	0.0033 (15)	−0.0208 (17)
O10	0.087 (2)	0.059 (2)	0.085 (2)	0.0016 (19)	0.042 (2)	0.0066 (18)

Geometric parameters (Å, º) top

Zn—N4	2.128 (3)	C17—H17	0.9300
Zn—N3	2.129 (3)	C18—C19	1.427 (5)
Zn—N2	2.148 (3)	C18—H18	0.9300
Zn—N1	2.167 (3)	C19—C23	1.401 (5)
Zn—O1	2.178 (3)	C19—C20	1.405 (5)
Zn—O2	2.224 (3)	C20—C21	1.374 (5)
Zn—C25	2.540 (4)	C20—H20	0.9300
N1—C1	1.320 (4)	C21—C22	1.393 (5)
N1—C12	1.363 (4)	C21—H21	0.9300
N2—C10	1.325 (5)	C22—H22	0.9300
N2—C11	1.367 (4)	C23—C24	1.437 (5)
C1—C2	1.388 (5)	O1—C25	1.262 (4)
C1—H1	0.9300	O2—C25	1.259 (4)
C2—C3	1.363 (6)	C25—C26	1.509 (5)
C2—H2	0.9300	C26—C27	1.519 (5)
C3—C4	1.395 (6)	C26—H26A	0.9700
C3—H3	0.9300	C26—H26B	0.9700
C4—C12	1.400 (5)	C27—C28	1.521 (5)
C4—C5	1.438 (6)	C27—H27A	0.9700
C5—C6	1.341 (6)	C27—H27B	0.9700
C5—H5	0.9300	C28—C29	1.512 (5)
C6—C7	1.431 (6)	C28—H28A	0.9700
C6—H6	0.9300	C28—H28B	0.9700
C7—C8	1.393 (6)	C29—C30	1.507 (5)
C7—C11	1.408 (5)	C29—H29A	0.9700
C8—C9	1.357 (6)	C29—H29B	0.9700
C8—H8	0.9300	C30—C31	1.521 (5)
C9—C10	1.395 (5)	C30—H30A	0.9700
C9—H9	0.9300	C30—H30B	0.9700
C10—H10	0.9300	C31—O4	1.242 (4)
C11—C12	1.437 (5)	C31—O3	1.264 (4)
N3—C13	1.331 (4)	O5—H5A	0.84 (2)
N3—C24	1.355 (4)	O5—H5B	0.84 (4)
N4—C22	1.333 (4)	O6—H6A	0.85 (4)
N4—C23	1.363 (4)	O6—H6B	0.83 (3)
C13—C14	1.385 (5)	O7—H7A	0.85 (3)
C13—H13	0.9300	O7—H7B	0.86 (2)
C14—C15	1.355 (5)	O8—H8A	0.85 (3)
C14—H14	0.9300	O8—H8B	0.85 (3)
C15—C16	1.403 (5)	O9—H9A	0.84 (4)
C15—H15	0.9300	O9—H9B	0.85 (3)
C16—C24	1.396 (4)	O10—H10A	0.86 (4)
C16—C17	1.436 (5)	O10—H10B	0.85 (3)
C17—C18	1.349 (5)

N4—Zn—N3	78.26 (11)	C14—C15—H15	120.4
N4—Zn—N2	99.28 (11)	C16—C15—H15	120.4
N3—Zn—N2	168.21 (11)	C24—C16—C15	117.5 (3)
N4—Zn—N1	109.01 (11)	C24—C16—C17	119.4 (3)
N3—Zn—N1	92.26 (11)	C15—C16—C17	123.0 (3)
N2—Zn—N1	77.55 (11)	C18—C17—C16	120.5 (3)
N4—Zn—O1	102.80 (10)	C18—C17—H17	119.8
N3—Zn—O1	104.68 (10)	C16—C17—H17	119.8
N2—Zn—O1	87.11 (10)	C17—C18—C19	121.3 (3)
N1—Zn—O1	146.42 (10)	C17—C18—H18	119.4
N4—Zn—O2	156.42 (10)	C19—C18—H18	119.4
N3—Zn—O2	90.89 (10)	C23—C19—C20	117.3 (3)
N2—Zn—O2	95.35 (10)	C23—C19—C18	119.6 (3)
N1—Zn—O2	92.10 (10)	C20—C19—C18	123.1 (3)
O1—Zn—O2	59.45 (9)	C21—C20—C19	119.2 (4)
N4—Zn—C25	131.21 (12)	C21—C20—H20	120.4
N3—Zn—C25	99.51 (11)	C19—C20—H20	120.4
N2—Zn—C25	90.80 (11)	C20—C21—C22	119.8 (4)
N1—Zn—C25	119.78 (12)	C20—C21—H21	120.1
O1—Zn—C25	29.77 (10)	C22—C21—H21	120.1
O2—Zn—C25	29.69 (10)	N4—C22—C21	122.6 (3)
C1—N1—C12	117.3 (3)	N4—C22—H22	118.7
C1—N1—Zn	129.5 (3)	C21—C22—H22	118.7
C12—N1—Zn	113.0 (2)	N4—C23—C19	123.3 (3)
C10—N2—C11	118.2 (3)	N4—C23—C24	117.5 (3)
C10—N2—Zn	127.9 (3)	C19—C23—C24	119.2 (3)
C11—N2—Zn	113.6 (2)	N3—C24—C16	122.8 (3)
N1—C1—C2	123.8 (4)	N3—C24—C23	117.3 (3)
N1—C1—H1	118.1	C16—C24—C23	119.9 (3)
C2—C1—H1	118.1	C25—O1—Zn	91.2 (2)
C3—C2—C1	118.8 (4)	C25—O2—Zn	89.2 (2)
C3—C2—H2	120.6	O2—C25—O1	120.1 (3)
C1—C2—H2	120.6	O2—C25—C26	119.9 (3)
C2—C3—C4	120.1 (4)	O1—C25—C26	120.0 (4)
C2—C3—H3	120.0	O2—C25—Zn	61.09 (19)
C4—C3—H3	120.0	O1—C25—Zn	59.01 (18)
C3—C4—C12	117.1 (4)	C26—C25—Zn	177.7 (3)
C3—C4—C5	123.5 (4)	C25—C26—C27	112.9 (3)
C12—C4—C5	119.3 (4)	C25—C26—H26A	109.0
C6—C5—C4	120.7 (4)	C27—C26—H26A	109.0
C6—C5—H5	119.6	C25—C26—H26B	109.0
C4—C5—H5	119.6	C27—C26—H26B	109.0
C5—C6—C7	122.1 (4)	H26A—C26—H26B	107.8
C5—C6—H6	118.9	C26—C27—C28	115.2 (3)
C7—C6—H6	118.9	C26—C27—H27A	108.5
C8—C7—C11	117.5 (4)	C28—C27—H27A	108.5
C8—C7—C6	124.5 (4)	C26—C27—H27B	108.5
C11—C7—C6	118.0 (4)	C28—C27—H27B	108.5
C9—C8—C7	120.3 (4)	H27A—C27—H27B	107.5
C9—C8—H8	119.8	C29—C28—C27	111.8 (3)
C7—C8—H8	119.8	C29—C28—H28A	109.2
C8—C9—C10	119.1 (4)	C27—C28—H28A	109.2
C8—C9—H9	120.5	C29—C28—H28B	109.2
C10—C9—H9	120.5	C27—C28—H28B	109.2
N2—C10—C9	123.0 (4)	H28A—C28—H28B	107.9
N2—C10—H10	118.5	C30—C29—C28	115.8 (3)
C9—C10—H10	118.5	C30—C29—H29A	108.3
N2—C11—C7	122.0 (4)	C28—C29—H29A	108.3
N2—C11—C12	117.5 (3)	C30—C29—H29B	108.3
C7—C11—C12	120.5 (3)	C28—C29—H29B	108.3
N1—C12—C4	122.9 (4)	H29A—C29—H29B	107.4
N1—C12—C11	117.7 (3)	C29—C30—C31	116.5 (3)
C4—C12—C11	119.3 (3)	C29—C30—H30A	108.2
C13—N3—C24	117.8 (3)	C31—C30—H30A	108.2
C13—N3—Zn	128.8 (3)	C29—C30—H30B	108.2
C24—N3—Zn	112.9 (2)	C31—C30—H30B	108.2
C22—N4—C23	117.7 (3)	H30A—C30—H30B	107.3
C22—N4—Zn	129.3 (2)	O4—C31—O3	124.9 (3)
C23—N4—Zn	112.6 (2)	O4—C31—C30	119.2 (3)
N3—C13—C14	122.6 (4)	O3—C31—C30	115.8 (4)
N3—C13—H13	118.7	H5A—O5—H5B	111 (3)
C14—C13—H13	118.7	H6A—O6—H6B	111 (3)
C15—C14—C13	120.0 (4)	H7A—O7—H7B	107 (3)
C15—C14—H14	120.0	H8A—O8—H8B	108 (3)
C13—C14—H14	120.0	H9A—O9—H9B	108 (3)
C14—C15—C16	119.2 (3)	H10A—O10—H10B	107 (3)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O5—H5A···O8ⁱ	0.84 (2)	1.95 (2)	2.776 (5)	165 (5)
O5—H5B···O10	0.84 (4)	1.90 (4)	2.733 (6)	170 (4)
O6—H6A···O4ⁱⁱ	0.85 (4)	2.02 (2)	2.861 (5)	176 (3)
O6—H6B···O7	0.83 (3)	2.16 (3)	2.985 (5)	170 (3)
O7—H7A···O5	0.85 (3)	1.89 (3)	2.734 (5)	176 (5)
O7—H7B···O2ⁱⁱⁱ	0.86 (2)	1.97 (2)	2.828 (4)	174 (5)
O8—H8A···O9	0.85 (3)	1.96 (3)	2.804 (4)	172 (4)
O8—H8B···O4ⁱⁱ	0.85 (3)	1.99 (3)	2.832 (4)	173 (3)
O9—H9A···O7	0.84 (4)	1.95 (2)	2.789 (4)	175 (4)
O9—H9B···O3^iv	0.85 (3)	1.89 (3)	2.736 (4)	173 (4)
O10—H10A···O3^iv	0.86 (2)	1.88 (4)	2.732 (4)	171 (4)
O10—H10B···O1	0.85 (3)	2.11 (3)	2.957 (4)	176 (4)
C2—H2···O9^v	0.93	2.53	3.429 (5)	162
C5—H5···O2^vi	0.93	2.55	3.381 (4)	149
C17—H17···O1^vii	0.93	2.59	3.263 (4)	129
C18—H18···O6^iv	0.93	2.50	3.344 (5)	151
C26—H26B···Cg1ⁱ	0.97	2.99	3.791 (4)	140
C27—H27A···Cg2ⁱ	0.97	2.82	3.375 (4)	117

Symmetry codes: (i) x−1, y, z; (ii) x+1, y, z; (iii) −x+1/2, y+1/2, −z+3/2; (iv) x+1/2, −y+1/2, z−1/2; (v) −x+3/2, y−1/2, −z+3/2; (vi) −x+1, −y, −z+2; (vii) −x+1, −y, −z+1.

Experimental details

Crystal data
Chemical formula	[Zn(C₇H₁₀O₄)(C₁₂H₈N₂)₂]·6H₂O
M_r	692.02
Crystal system, space group	Monoclinic, P2₁/n
Temperature (K)	296
a, b, c (Å)	9.2050 (18), 21.241 (4), 16.598 (3)
β (°)	96.48 (3)
V (Å³)	3224.6 (11)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	0.82
Crystal size (mm)	0.43 × 0.26 × 0.22

Data collection
Diffractometer	Bruker P4 diffractometer
Absorption correction	ψ scan (North et al., 1968)
T_min, T_max	0.697, 0.834
No. of measured, independent and observed [I > 2σ(I)] reflections	9226, 7393, 3956
R_int	0.043
(sin θ/λ)_max (Å⁻¹)	0.650

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.059, 0.117, 1.01
No. of reflections	7393
No. of parameters	453
No. of restraints	18
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.34, −0.29

Computer programs: XSCANS (Siemens, 1996), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Selected geometric parameters (Å, º) top

Zn—N4	2.128 (3)	Zn—N1	2.167 (3)
Zn—N3	2.129 (3)	Zn—O1	2.178 (3)
Zn—N2	2.148 (3)	Zn—O2	2.224 (3)

N4—Zn—N3	78.26 (11)	N2—Zn—O1	87.11 (10)
N4—Zn—N2	99.28 (11)	N1—Zn—O1	146.42 (10)
N3—Zn—N2	168.21 (11)	N4—Zn—O2	156.42 (10)
N4—Zn—N1	109.01 (11)	N3—Zn—O2	90.89 (10)
N3—Zn—N1	92.26 (11)	N2—Zn—O2	95.35 (10)
N2—Zn—N1	77.55 (11)	N1—Zn—O2	92.10 (10)
N4—Zn—O1	102.80 (10)	O1—Zn—O2	59.45 (9)
N3—Zn—O1	104.68 (10)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O5—H5A···O8ⁱ	0.84 (2)	1.95 (2)	2.776 (5)	165 (5)
O5—H5B···O10	0.84 (4)	1.90 (4)	2.733 (6)	170 (4)
O6—H6A···O4ⁱⁱ	0.85 (4)	2.02 (2)	2.861 (5)	176 (3)
O6—H6B···O7	0.83 (3)	2.16 (3)	2.985 (5)	170 (3)
O7—H7A···O5	0.85 (3)	1.89 (3)	2.734 (5)	176 (5)
O7—H7B···O2ⁱⁱⁱ	0.86 (2)	1.97 (2)	2.828 (4)	174 (5)
O8—H8A···O9	0.85 (3)	1.96 (3)	2.804 (4)	172 (4)
O8—H8B···O4ⁱⁱ	0.85 (3)	1.99 (3)	2.832 (4)	173 (3)
O9—H9A···O7	0.84 (4)	1.95 (2)	2.789 (4)	175 (4)
O9—H9B···O3^iv	0.85 (3)	1.89 (3)	2.736 (4)	173 (4)
O10—H10A···O3^iv	0.86 (2)	1.88 (4)	2.732 (4)	171 (4)
O10—H10B···O1	0.85 (3)	2.11 (3)	2.957 (4)	176 (4)
C2—H2···O9^v	0.93	2.53	3.429 (5)	162
C5—H5···O2^vi	0.93	2.55	3.381 (4)	149
C17—H17···O1^vii	0.93	2.59	3.263 (4)	129
C18—H18···O6^iv	0.93	2.50	3.344 (5)	151
C26—H26B···Cg1ⁱ	0.97	2.99	3.791 (4)	140
C27—H27A···Cg2ⁱ	0.97	2.82	3.375 (4)	117

Acknowledgements

This project was supported by the Zhejiang Provincial Fund for Analysis and Measurements (grant No. 04058), the Scientific Research Fund of Ningbo University (grant No. XK200457), the Expert Project of Key Basic Research of the Ministry of Science and Technology of China (grant No. 2003CCA00800), the Zhejiang Provincial Natural Science Foundation (grant No. Z203067) and the Ningbo Municipal Natural Science Foundation (grant No. 2003 A62026).

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