Poly[μ2-benzene-1,3-dicarboxyl­ato-κ2O:O′-μ2-1,3-di-4-pyridylpropane-κ2N:N′-zinc(II)]

Huang, J.-F.; Dai, Y.-M.; Lin, J.-R.; Lin, H.; Tang, E.

doi:10.1107/S1600536808001621

metal-organic compounds

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 64| Part 2| February 2008| Page m386

doi:10.1107/S1600536808001621

Open

access

Poly[μ₂-benzene-1,3-dicarboxylato-κ²O:O′-μ₂-1,3-di-4-pyridylpropane-κ²N:N′-zinc(II)]

Jin-Feng Huang,^a Yu-Mei Dai,^a ^* Jian-Rong Lin,^a Hui Lin ^a and En Tang ^b,^c

^aCollege of Chemistry and Materials, Fujian Normal University, Fuzhou 350007, People's Republic of China, ^bState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China, and ^cConjugate and Medicinal Chemistry Laboratory, Department of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
^*Correspondence e-mail: dym@fjnu.edu.cn

(Received 13 December 2007; accepted 16 January 2008; online 23 January 2008)

The title compound, [Zn(C₈H₄O₄)(C₁₃H₁₄N₂)]_n, was obtained by the hydrothermal reaction of Zn(OAc)₂·H₂O with 1,3-di-4-pyridylpropane (bpp) and isophthalic acid (H₂ip). The Zn^II ion is coordinated by two bpp and two ip ligands in a distorted tetrahedral environment. Each ligand coordinates in a bridging mode to connect Zn^II ions into a three-dimensional diamondoid-type structure.

Related literature

For related literature, see: Dai et al. (2005 ); Evans et al. (1999 ); Tang et al. (2004 ); Fujita et al. (1994 ).

Experimental

Crystal data

[Zn(C₈H₄O₄)(C₁₃H₁₄N₂)]
M_r = 427.76
Monoclinic, P 2₁ /c
a = 11.0418 (13) Å
b = 11.1924 (14) Å
c = 16.8687 (17) Å
β = 115.249 (7)°
V = 1885.5 (4) Å³
Z = 4
Mo Kα radiation
μ = 1.33 mm⁻¹
T = 293 (2) K
0.30 × 0.20 × 0.10 mm

Data collection

Bruker SMART CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ) T_min = 0.733, T_max = 0.875
14111 measured reflections
4328 independent reflections
3887 reflections with I > 2σ(I)
R_int = 0.020

Refinement

R[F² > 2σ(F²)] = 0.040
wR(F²) = 0.115
S = 1.04
4328 reflections
254 parameters
H-atom parameters constrained
Δρ_max = 0.73 e Å⁻³
Δρ_min = −0.76 e Å⁻³

Table 1
Selected geometric parameters (Å, °)

Zn1—O2	1.9511 (17)
Zn1—O4ⁱ	1.9621 (17)
Zn1—N2	2.041 (2)
Zn1—N1	2.051 (2)

O2—Zn1—O4ⁱ	101.92 (7)
O2—Zn1—N2	114.19 (8)
O4ⁱ—Zn1—N2	122.01 (8)
O2—Zn1—N1	109.01 (8)
O4ⁱ—Zn1—N1	100.98 (8)
N2—Zn1—N1	107.55 (8)
Symmetry code: (i) $[x, -y+{\script{5\over 2}}, z+{\script{1\over 2}}]$ .

Data collection: SMART (Siemens, 1996 ); cell refinement: SAINT (Siemens, 1997 ); 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 I, global. DOI: 10.1107/S1600536808001621/lh2583sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536808001621/lh2583Isup2.hkl

checkCIF report

Comment top

A large family of coordination polymers has been developed recently owing to their potential applications as functional solid materials and their intriguing architectures or topologies (Evans et al., 1999; Fujita et al., 1994). It is now well understood that the hydrothermal crystallization of metal centers with multidentate N– or O-donor ligands, which possess more rich coordination sites and a wide variety of shapes to facilitate the formation of various networks, is one of the useful approaches to assembly desired new materials. An impressive literature of one-, two- and three-dimensional frameworks based on these ligands (Dai et al., 2005,Tang et al., 2004) with various structural motifs, such as helical, brick wall, ladder, honeycomb, square grid, parquet, and diamondoid, have been reported to date. Here we report the synthesis and crystal structure of the title compound (I).

In (I) [Fig. 1] each Zn^II ion coordinates to two pyridine N atoms of two bpp ligands and two carboxylate groups of two ip ligands, in monodentate modes, giving a distorted tetrahedral coordination environment. Both bpp and ip ligands coordinate in bridging modes to for a three-dimensional diamondoid structure with Zn···Zn separations of 9.425 and 12.745Å and formimg cavities within the structure (Fig. 2).

Related literature top

For related literature, see: Dai et al. (2005); Evans et al. (1999); Tang et al. (2004); Fujita et al. (1994).

Experimental top

A mixture of Zn(Ac)₂ H₂O (1.00 mmol, 0.22 g), bpp (1.00 mmol, 0.19 g), H₂ip (1.00 mmol, 0.16 g) and H₂O (15 ml) was vigorous stirring until the pH was adjusted to 6 by adding 10% NaOH. This mixture was heated at 433 K for 3 days in a sealed 25 ml Teflon-lined stainless steel vessel under autogenous pressure. After cooling to room temperature at 50 K h^-1, orange prism-shaped crystals were isolated, which were washed with ethanol and dried in air.

Computing details top

Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1997); data reduction: SAINT (Siemens, 1997); 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 asymmetric unit showing 30% probability displacement ellipsoids. A symmetry related O atom is shown to complete the tetrahedral coordination [symmetry code: (A) x, 5/2 - y, 1/2 + z]. H atoms are not shown.
	Fig. 2. Part of the crystal structure of the title compound.

Poly[µ₂-benzene-1,3-dicarboxylato-κ²O:O'-µ₂-1,3-di-4-πyridylpropane-κ²N:N'-zinc(II)] top

Crystal data top

[Zn(C₈H₄O₄)(C₁₃H₁₄N₂)]	F(000) = 880
M_r = 427.76	D_x = 1.507 Mg m⁻³
Monoclinic, P2₁/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 4994 reflections
a = 11.0418 (13) Å	θ = 3.2–27.5°
b = 11.1924 (14) Å	µ = 1.33 mm⁻¹
c = 16.8687 (17) Å	T = 293 K
β = 115.249 (7)°	Prism, orange
V = 1885.5 (4) Å³	0.30 × 0.20 × 0.10 mm
Z = 4

Data collection top

Bruker SMART CCD diffractometer	4328 independent reflections
Radiation source: fine-focus sealed tube	3887 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.020
ω scans	θ_max = 27.5°, θ_min = 3.2°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −14→14
T_min = 0.733, T_max = 0.875	k = −11→14
14111 measured reflections	l = −21→21

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)] = 0.040	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.115	H-atom parameters constrained
S = 1.04	w = 1/[σ²(F_o²) + (0.0695P)² + 1.1112P] where P = (F_o² + 2F_c²)/3
4328 reflections	(Δ/σ)_max = 0.002
254 parameters	Δρ_max = 0.73 e Å⁻³
0 restraints	Δρ_min = −0.76 e Å⁻³

Crystal data top

[Zn(C₈H₄O₄)(C₁₃H₁₄N₂)]	V = 1885.5 (4) Å³
M_r = 427.76	Z = 4
Monoclinic, P2₁/c	Mo Kα radiation
a = 11.0418 (13) Å	µ = 1.33 mm⁻¹
b = 11.1924 (14) Å	T = 293 K
c = 16.8687 (17) Å	0.30 × 0.20 × 0.10 mm
β = 115.249 (7)°

Data collection top

Bruker SMART CCD diffractometer	4328 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	3887 reflections with I > 2σ(I)
T_min = 0.733, T_max = 0.875	R_int = 0.020
14111 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.040	0 restraints
wR(F²) = 0.115	H-atom parameters constrained
S = 1.04	Δρ_max = 0.73 e Å⁻³
4328 reflections	Δρ_min = −0.76 e Å⁻³
254 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
Zn1	0.21026 (3)	1.06213 (2)	0.850451 (16)	0.03187 (11)
O1	0.1788 (2)	0.88899 (17)	0.71665 (12)	0.0485 (5)
O2	0.2385 (2)	1.07900 (15)	0.74443 (11)	0.0405 (4)
O3	0.2086 (3)	1.3428 (2)	0.50730 (17)	0.0828 (9)
O4	0.22045 (18)	1.27148 (16)	0.38941 (11)	0.0412 (4)
N1	0.0122 (2)	1.02485 (18)	0.81573 (13)	0.0346 (4)
N2	0.3207 (2)	0.92958 (18)	0.93261 (13)	0.0379 (5)
C1	0.1641 (2)	1.0385 (2)	0.43263 (15)	0.0375 (5)
H1A	0.1559	1.0490	0.3759	0.045*
C2	0.1551 (2)	0.9102 (2)	0.54416 (16)	0.0354 (5)
H2A	0.1387	0.8354	0.5616	0.042*
C3	−0.0341 (3)	0.9129 (2)	0.81017 (17)	0.0388 (5)
H3A	0.0255	0.8498	0.8201	0.047*
C4	−0.4016 (3)	0.9562 (3)	0.7578 (2)	0.0491 (7)
H4A	−0.4054	0.9442	0.8137	0.059*
H4B	−0.4533	1.0272	0.7313	0.059*
C5	−0.1657 (3)	0.8869 (2)	0.79050 (16)	0.0410 (5)
H5A	−0.1931	0.8078	0.7875	0.049*
C6	−0.2578 (2)	0.9791 (2)	0.77504 (15)	0.0370 (5)
C7	0.1420 (3)	0.9271 (2)	0.45968 (17)	0.0407 (6)
H7A	0.1182	0.8632	0.4207	0.049*
C8	0.2136 (2)	1.1160 (2)	0.57552 (14)	0.0333 (5)
H8A	0.2380	1.1798	0.6146	0.040*
C9	0.1985 (2)	1.1341 (2)	0.49008 (14)	0.0332 (5)
C10	0.2109 (3)	1.2590 (2)	0.46194 (16)	0.0403 (5)
C11	0.2035 (2)	0.9872 (2)	0.69431 (14)	0.0322 (5)
C12	0.4479 (2)	0.7383 (2)	1.04535 (15)	0.0353 (5)
C13	0.1929 (2)	1.0050 (2)	0.60318 (14)	0.0302 (4)
C14	0.3843 (5)	0.8270 (3)	1.0680 (2)	0.0765 (12)
H14A	0.3829	0.8252	1.1227	0.092*
C15	0.3220 (5)	0.9198 (3)	1.0112 (2)	0.0780 (13)
H15A	0.2790	0.9782	1.0290	0.094*
C16	0.3822 (3)	0.8432 (3)	0.91049 (19)	0.0596 (9)
H16A	0.3829	0.8469	0.8556	0.072*
C17	0.4451 (3)	0.7481 (3)	0.96411 (18)	0.0575 (8)
H17A	0.4862	0.6900	0.9446	0.069*
C18	−0.0769 (3)	1.1138 (2)	0.79964 (17)	0.0413 (5)
H18A	−0.0472	1.1921	0.8027	0.050*
C19	−0.4686 (3)	0.8497 (2)	0.69901 (16)	0.0424 (6)
H19A	−0.4147	0.7790	0.7231	0.051*
H19B	−0.5554	0.8365	0.6990	0.051*
C20	0.5127 (2)	0.6335 (2)	1.10512 (16)	0.0393 (5)
H20A	0.5996	0.6190	1.1055	0.047*
H20B	0.4582	0.5630	1.0811	0.047*
C21	−0.2100 (3)	1.0941 (2)	0.77886 (18)	0.0429 (6)
H21A	−0.2682	1.1586	0.7673	0.051*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Zn1	0.03897 (18)	0.03055 (17)	0.02643 (16)	−0.00058 (10)	0.01427 (12)	0.00286 (9)
O1	0.0735 (13)	0.0335 (9)	0.0400 (9)	−0.0039 (9)	0.0257 (9)	0.0072 (8)
O2	0.0602 (11)	0.0360 (9)	0.0325 (8)	−0.0046 (8)	0.0266 (8)	−0.0023 (7)
O3	0.166 (3)	0.0358 (11)	0.0722 (15)	−0.0180 (14)	0.0749 (18)	−0.0039 (11)
O4	0.0501 (10)	0.0401 (9)	0.0381 (9)	0.0086 (8)	0.0233 (8)	0.0138 (7)
N1	0.0386 (10)	0.0289 (9)	0.0346 (9)	−0.0028 (8)	0.0139 (8)	−0.0002 (8)
N2	0.0436 (11)	0.0367 (11)	0.0306 (10)	0.0021 (8)	0.0131 (9)	0.0055 (8)
C1	0.0402 (12)	0.0450 (13)	0.0271 (10)	0.0023 (10)	0.0143 (9)	0.0005 (10)
C2	0.0417 (12)	0.0290 (11)	0.0362 (11)	−0.0001 (9)	0.0173 (10)	0.0000 (9)
C3	0.0459 (13)	0.0282 (11)	0.0433 (13)	0.0008 (10)	0.0198 (11)	0.0017 (10)
C4	0.0458 (14)	0.0557 (17)	0.0506 (15)	−0.0129 (12)	0.0250 (13)	−0.0232 (13)
C5	0.0525 (14)	0.0300 (12)	0.0417 (13)	−0.0090 (10)	0.0213 (11)	−0.0047 (10)
C6	0.0410 (12)	0.0406 (13)	0.0301 (10)	−0.0072 (10)	0.0160 (9)	−0.0095 (10)
C7	0.0514 (15)	0.0356 (13)	0.0346 (12)	−0.0032 (10)	0.0180 (11)	−0.0090 (10)
C8	0.0411 (12)	0.0304 (11)	0.0301 (10)	−0.0019 (9)	0.0167 (9)	−0.0020 (9)
C9	0.0369 (11)	0.0338 (12)	0.0306 (10)	0.0009 (9)	0.0160 (9)	0.0043 (9)
C10	0.0510 (14)	0.0363 (13)	0.0370 (12)	−0.0009 (10)	0.0221 (11)	0.0055 (10)
C11	0.0365 (11)	0.0316 (11)	0.0301 (10)	0.0039 (9)	0.0157 (9)	0.0031 (9)
C12	0.0342 (11)	0.0348 (12)	0.0343 (11)	0.0005 (9)	0.0121 (9)	0.0042 (9)
C13	0.0324 (10)	0.0300 (11)	0.0296 (10)	0.0029 (8)	0.0146 (8)	0.0019 (8)
C14	0.145 (4)	0.0503 (18)	0.0402 (15)	0.042 (2)	0.046 (2)	0.0145 (13)
C15	0.148 (4)	0.0481 (17)	0.0414 (16)	0.046 (2)	0.044 (2)	0.0115 (13)
C16	0.0671 (19)	0.078 (2)	0.0407 (14)	0.0318 (17)	0.0300 (14)	0.0196 (14)
C17	0.0651 (18)	0.069 (2)	0.0436 (14)	0.0355 (16)	0.0278 (14)	0.0143 (14)
C18	0.0454 (13)	0.0274 (12)	0.0484 (14)	−0.0035 (10)	0.0175 (11)	−0.0010 (10)
C19	0.0398 (13)	0.0458 (14)	0.0429 (13)	−0.0119 (11)	0.0190 (11)	−0.0146 (11)
C20	0.0399 (13)	0.0367 (13)	0.0417 (12)	0.0067 (10)	0.0179 (10)	0.0076 (10)
C21	0.0429 (14)	0.0339 (12)	0.0493 (14)	0.0026 (11)	0.0172 (12)	−0.0044 (11)

Geometric parameters (Å, º) top

Zn1—O2	1.9511 (17)	C5—H5A	0.9300
Zn1—O4ⁱ	1.9621 (17)	C6—C21	1.383 (4)
Zn1—N2	2.041 (2)	C7—H7A	0.9300
Zn1—N1	2.051 (2)	C8—C9	1.393 (3)
O1—C11	1.230 (3)	C8—C13	1.381 (3)
O2—C11	1.281 (3)	C8—H8A	0.9300
O3—C10	1.218 (3)	C9—C10	1.501 (3)
O4—C10	1.279 (3)	C11—C13	1.504 (3)
O4—Zn1ⁱⁱ	1.9621 (17)	C12—C14	1.361 (4)
N1—C18	1.343 (3)	C12—C17	1.362 (3)
N1—C3	1.342 (3)	C12—C20	1.513 (3)
N2—C16	1.323 (4)	C14—C15	1.381 (4)
N2—C15	1.324 (4)	C14—H14A	0.9300
C1—C9	1.384 (3)	C15—H15A	0.9300
C1—C7	1.384 (4)	C16—C17	1.377 (4)
C1—H1A	0.9300	C16—H16A	0.9300
C2—C7	1.383 (3)	C17—H17A	0.9300
C2—C13	1.392 (3)	C18—C21	1.376 (4)
C2—H2A	0.9300	C18—H18A	0.9300
C3—C5	1.376 (4)	C19—C20ⁱⁱⁱ	1.519 (3)
C3—H3A	0.9300	C19—H19A	0.9700
C4—C19	1.524 (3)	C19—H19B	0.9700
C4—C6	1.509 (4)	C20—C19^iv	1.519 (3)
C4—H4A	0.9700	C20—H20A	0.9700
C4—H4B	0.9700	C20—H20B	0.9700
C5—C6	1.393 (4)	C21—H21A	0.9300

O2—Zn1—O4ⁱ	101.92 (7)	C1—C9—C10	122.2 (2)
O2—Zn1—N2	114.19 (8)	O3—C10—O4	123.3 (2)
O4ⁱ—Zn1—N2	122.01 (8)	O3—C10—C9	119.3 (2)
O2—Zn1—N1	109.01 (8)	O4—C10—C9	117.4 (2)
O4ⁱ—Zn1—N1	100.98 (8)	O1—C11—O2	123.9 (2)
N2—Zn1—N1	107.55 (8)	O1—C11—C13	120.0 (2)
C11—O2—Zn1	113.99 (14)	O2—C11—C13	116.04 (19)
C10—O4—Zn1ⁱⁱ	114.07 (17)	C14—C12—C17	115.5 (2)
C18—N1—C3	117.0 (2)	C14—C12—C20	122.2 (2)
C18—N1—Zn1	120.43 (17)	C17—C12—C20	122.3 (2)
C3—N1—Zn1	122.55 (17)	C8—C13—C2	119.1 (2)
C16—N2—C15	115.7 (2)	C8—C13—C11	120.8 (2)
C16—N2—Zn1	124.72 (18)	C2—C13—C11	120.0 (2)
C15—N2—Zn1	119.2 (2)	C12—C14—C15	121.2 (3)
C9—C1—C7	120.0 (2)	C12—C14—H14A	119.4
C9—C1—H1A	120.0	C15—C14—H14A	119.4
C7—C1—H1A	120.0	N2—C15—C14	123.1 (3)
C7—C2—C13	120.1 (2)	N2—C15—H15A	118.4
C7—C2—H2A	120.0	C14—C15—H15A	118.4
C13—C2—H2A	120.0	N2—C16—C17	123.7 (2)
N1—C3—C5	123.1 (2)	N2—C16—H16A	118.1
N1—C3—H3A	118.5	C17—C16—H16A	118.1
C5—C3—H3A	118.5	C16—C17—C12	120.8 (3)
C19—C4—C6	115.9 (2)	C16—C17—H17A	119.6
C19—C4—H4A	108.3	C12—C17—H17A	119.6
C6—C4—H4A	108.3	N1—C18—C21	122.9 (2)
C19—C4—H4B	108.3	N1—C18—H18A	118.5
C6—C4—H4B	108.3	C21—C18—H18A	118.5
H4A—C4—H4B	107.4	C20ⁱⁱⁱ—C19—C4	113.2 (2)
C3—C5—C6	120.0 (2)	C20ⁱⁱⁱ—C19—H19A	108.9
C3—C5—H5A	120.0	C4—C19—H19A	108.9
C6—C5—H5A	120.0	C20ⁱⁱⁱ—C19—H19B	108.9
C5—C6—C21	116.6 (2)	C4—C19—H19B	108.9
C5—C6—C4	122.3 (2)	H19A—C19—H19B	107.7
C21—C6—C4	121.1 (2)	C12—C20—C19^iv	114.5 (2)
C2—C7—C1	120.5 (2)	C12—C20—H20A	108.6
C2—C7—H7A	119.8	C19^iv—C20—H20A	108.6
C1—C7—H7A	119.8	C12—C20—H20B	108.6
C9—C8—C13	121.1 (2)	C19^iv—C20—H20B	108.6
C9—C8—H8A	119.5	H20A—C20—H20B	107.6
C13—C8—H8A	119.5	C18—C21—C6	120.4 (2)
C8—C9—C1	119.2 (2)	C18—C21—H21A	119.8
C8—C9—C10	118.4 (2)	C6—C21—H21A	119.8

Symmetry codes: (i) x, −y+5/2, z+1/2; (ii) x, −y+5/2, z−1/2; (iii) x−1, −y+3/2, z−1/2; (iv) x+1, −y+3/2, z+1/2.

Experimental details

Crystal data
Chemical formula	[Zn(C₈H₄O₄)(C₁₃H₁₄N₂)]
M_r	427.76
Crystal system, space group	Monoclinic, P2₁/c
Temperature (K)	293
a, b, c (Å)	11.0418 (13), 11.1924 (14), 16.8687 (17)
β (°)	115.249 (7)
V (Å³)	1885.5 (4)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	1.33
Crystal size (mm)	0.30 × 0.20 × 0.10

Data collection
Diffractometer	Bruker SMART CCD diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996)
T_min, T_max	0.733, 0.875
No. of measured, independent and observed [I > 2σ(I)] reflections	14111, 4328, 3887
R_int	0.020
(sin θ/λ)_max (Å⁻¹)	0.649

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.040, 0.115, 1.04
No. of reflections	4328
No. of parameters	254
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.73, −0.76

Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1997), SHELXTL (Sheldrick, 2008).

Selected geometric parameters (Å, º) top

Zn1—O2	1.9511 (17)	Zn1—N2	2.041 (2)
Zn1—O4ⁱ	1.9621 (17)	Zn1—N1	2.051 (2)

O2—Zn1—O4ⁱ	101.92 (7)	O2—Zn1—N1	109.01 (8)
O2—Zn1—N2	114.19 (8)	O4ⁱ—Zn1—N1	100.98 (8)
O4ⁱ—Zn1—N2	122.01 (8)	N2—Zn1—N1	107.55 (8)

Symmetry code: (i) x, −y+5/2, z+1/2.

Acknowledgements

This work was financially supported by the Youth Talent Foundation of Fujian Province (2006F3010330083).

References

Dai, Y. M., Tang, E. Ma. E., Zhang, J., Li, Z. J. & Yao, Y. G. (2005). Cryst. Growth Des. 5, 1313–1315. Web of Science CSD CrossRef CAS Google Scholar
Evans, O. R., Xiong, R., Wang, Z., Wong, G. K. & Lin, W. (1999). Angew. Chem. Int. Ed. 38, 536–538. CrossRef CAS Google Scholar
Fujita, M., Kwon, Y. J., Washizu, S. & Ogura, K. (1994). J. Am. Chem. Soc. 116, 1151–1152. CSD CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Siemens (1996). SMART. Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA. Google Scholar
Siemens (1997). SAINT. Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA. Google Scholar
Tang, E., Dai, Y.-M. & Lin, S. (2004). Acta Cryst. C60, m433–m434. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.