Bis(2-cyclo­butyl­imino­methyl-4,6-dihydro­seleno­phenolato)zinc(II)

Zhu, D.; Lei, L.; Dai, X.-B.; Zeng, Q.-F.

doi:10.1107/S1600536809031596

metal-organic compounds

CRYSTALLOGRAPHIC
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ISSN: 2056-9890

Volume 65| Part 9| September 2009| Page m1076

doi:10.1107/S1600536809031596

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Bis(2-cyclobutyliminomethyl-4,6-dihydroselenophenolato)zinc(II)

Di Zhu,^a Lei Lei,^a Xi-Bin Dai ^a and Qing-Fu Zeng ^a ^*

^aEngineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan 430073, People's Republic of China
^*Correspondence e-mail: qfzeng@wuse.edu.cn

(Received 10 August 2009; accepted 11 August 2009; online 15 August 2009)

In the title complex, [Zn(C₁₁H₁₂NOSe₂)₂], the Zn^II atom is four-coordinated by two O,N-bidentate Schiff base ligands in a distorted tetrahedral geometry.

Related literature

For background to Schiff bases, see: Shi et al. (2008 ); Xu et al. (2009 ). For reference structural data, see: Allen et al. (1987 ).

Experimental

Crystal data

[Zn(C₁₁H₁₂NOSe₂)₂]
M_r = 729.64
Triclinic, $[P \overline 1]$
a = 8.0876 (6) Å
b = 12.2986 (16) Å
c = 12.7956 (16) Å
α = 93.166 (6)°
β = 108.216 (6)°
γ = 95.716 (6)°
V = 1197.9 (2) Å³
Z = 2
Mo Kα radiation
μ = 7.12 mm⁻¹
T = 296 K
0.32 × 0.28 × 0.25 mm

Data collection

Enraf–Nonius CAD-4 diffractometer
Absorption correction: ψ scan (North et al., 1968) T_min = 0.209, T_max = 0.269 (expected range = 0.131–0.168)
6184 measured reflections
4183 independent reflections
3165 reflections with I > 2σ(I)
R_int = 0.024
3 standard reflections every 200 reflections intensity decay: 1%

Refinement

R[F² > 2σ(F²)] = 0.046
wR(F²) = 0.130
S = 1.05
4183 reflections
284 parameters
H-atom parameters constrained
Δρ_max = 0.73 e Å⁻³
Δρ_min = −1.48 e Å⁻³

Table 1
Selected bond lengths (Å)

Zn1—N1	2.002 (5)
Zn1—N2	1.987 (5)
Zn1—O1	1.908 (4)
Zn1—O2	1.911 (4)

Data collection: CAD-4 Software (Enraf–Nonius, 1989 ); cell refinement: CAD-4 Software; data reduction: XCAD4 (Harms & Wocadlo, 1995 ); 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/S1600536809031596/hb5040sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536809031596/hb5040Isup2.hkl

checkCIF report

Comment top

There has been much research interest in Schiff base metal complexes due to their molecular architectures and biological activities (Shi et al., 2008; Xu et al., 2009). In this work, we report here the crystal structure of the title compound, (I). In (I), all bond lengths are within normal ranges (Allen et al., 1987) (Fig. 1). The Zn(II) is four-coordinated in a distorted tetrahedral coordination by two N atoms and two O atoms of the Schiff base ligands.

Related literature top

For background to Schiff bases, see: Shi et al. (2008); Xu et al. (2009). For reference structural data, see: Allen et al. (1987).

Experimental top

A mixture of 3,5-dihydroseleno-2-hydroxybenzaldehyde (564 mg, 2 mmol), cyclobutanamine (142 mg, 2 mmol) and ZnCl₂ (1 mmol, 134 mg) in methanol (10 ml) was stirred for 1 h. After keeping the filtrate in air for 8 d, colorless blocks of (I) were formed.

Computing details top

Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell refinement: CAD-4 Software (Enraf–Nonius, 1989); data reduction: XCAD4 (Harms & Wocadlo, 1995); 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 (I) showing 30% probability displacement ellipsoids.

Bis(2-cyclobutyliminomethyl-4,6-dihydroselenophenolato)zinc(II) top

Crystal data top

[Zn(C₁₁H₁₂NOSe₂)₂]	Z = 2
M_r = 729.64	F(000) = 704
Triclinic, P1	D_x = 2.023 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 8.0876 (6) Å	Cell parameters from 25 reflections
b = 12.2986 (16) Å	θ = 9–12°
c = 12.7956 (16) Å	µ = 7.12 mm⁻¹
α = 93.166 (6)°	T = 296 K
β = 108.216 (6)°	Block, colorless
γ = 95.716 (6)°	0.32 × 0.28 × 0.25 mm
V = 1197.9 (2) Å³

Data collection top

Enraf–Nonius CAD-4 diffractometer	3165 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	R_int = 0.024
Graphite monochromator	θ_max = 25.0°, θ_min = 1.7°
ω/2θ scans	h = −9→9
Absorption correction: ψ scan (North et al., 1968)	k = −11→14
T_min = 0.209, T_max = 0.269	l = −15→14
6184 measured reflections	3 standard reflections every 200 reflections
4183 independent reflections	intensity decay: 1%

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)] = 0.046	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.130	H-atom parameters constrained
S = 1.05	w = 1/[σ²(F_o²) + (0.0591P)² + 4.4413P] where P = (F_o² + 2F_c²)/3
4183 reflections	(Δ/σ)_max < 0.001
284 parameters	Δρ_max = 0.73 e Å⁻³
0 restraints	Δρ_min = −1.48 e Å⁻³

Crystal data top

[Zn(C₁₁H₁₂NOSe₂)₂]	γ = 95.716 (6)°
M_r = 729.64	V = 1197.9 (2) Å³
Triclinic, P1	Z = 2
a = 8.0876 (6) Å	Mo Kα radiation
b = 12.2986 (16) Å	µ = 7.12 mm⁻¹
c = 12.7956 (16) Å	T = 296 K
α = 93.166 (6)°	0.32 × 0.28 × 0.25 mm
β = 108.216 (6)°

Data collection top

Enraf–Nonius CAD-4 diffractometer	3165 reflections with I > 2σ(I)
Absorption correction: ψ scan (North et al., 1968)	R_int = 0.024
T_min = 0.209, T_max = 0.269	3 standard reflections every 200 reflections
6184 measured reflections	intensity decay: 1%
4183 independent reflections

Refinement top

R[F² > 2σ(F²)] = 0.046	0 restraints
wR(F²) = 0.130	H-atom parameters constrained
S = 1.05	Δρ_max = 0.73 e Å⁻³
4183 reflections	Δρ_min = −1.48 e Å⁻³
284 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
C3	−0.0178 (8)	0.4782 (5)	0.1563 (5)	0.0251 (13)
C4	−0.1460 (8)	0.5305 (5)	0.0777 (5)	0.0270 (14)
C5	−0.1629 (8)	0.6448 (5)	0.0877 (5)	0.0275 (14)
H5	−0.2448	0.6703	0.0285	0.033*
C6	−0.0144 (8)	0.3665 (5)	0.1286 (5)	0.0285 (14)
C8	0.2692 (9)	0.8003 (5)	0.6800 (5)	0.0334 (15)
H8	0.1939	0.7846	0.7206	0.040*
C9	0.0370 (9)	0.7100 (5)	0.5214 (5)	0.0333 (15)
H9	−0.0288	0.7034	0.5692	0.040*
C10	−0.2221 (9)	0.6202 (6)	0.3895 (6)	0.0351 (16)
H10	−0.2957	0.6743	0.3521	0.042*
C12	0.2138 (8)	0.7668 (5)	0.5674 (5)	0.0316 (15)
C13	0.3264 (8)	0.7890 (5)	0.5038 (5)	0.0301 (15)
C14	0.5457 (9)	0.8801 (6)	0.6732 (6)	0.0381 (17)
H14	0.6567	0.9177	0.7088	0.046*
C15	0.4932 (8)	0.8481 (5)	0.5614 (6)	0.0323 (15)
C16	0.4309 (9)	0.8554 (6)	0.7316 (6)	0.0394 (17)
C17	−0.1131 (9)	0.8311 (5)	0.1571 (6)	0.0381 (17)
H17	−0.2085	0.8365	0.0888	0.046*
C18	−0.1400 (11)	0.8977 (6)	0.2528 (8)	0.053 (2)
H18A	−0.2618	0.9052	0.2436	0.063*
H18B	−0.0817	0.8737	0.3246	0.063*
C19	−0.0413 (11)	0.9963 (6)	0.2242 (8)	0.059 (2)
H19A	0.0410	1.0404	0.2879	0.071*
H19B	−0.1158	1.0415	0.1747	0.071*
C20	−0.1314 (8)	0.3059 (5)	0.0389 (5)	0.0298 (14)
H20	−0.1264	0.2313	0.0265	0.036*
C21	−0.2633 (8)	0.4682 (5)	−0.0173 (5)	0.0314 (15)
H21	−0.3447	0.5025	−0.0692	0.038*
C22	−0.2581 (8)	0.3579 (5)	−0.0336 (5)	0.0313 (15)
C23	−0.2772 (10)	0.5116 (6)	0.3183 (7)	0.049 (2)
H23A	−0.1871	0.4629	0.3319	0.059*
H23B	−0.3285	0.5187	0.2400	0.059*
C24	−0.4130 (10)	0.4865 (7)	0.3787 (7)	0.048 (2)
H24A	−0.5283	0.5064	0.3405	0.058*
H24B	−0.4207	0.4121	0.3998	0.058*
C25	−0.3008 (10)	0.5711 (7)	0.4725 (6)	0.048 (2)
H25A	−0.3676	0.6196	0.5008	0.058*
H25B	−0.2175	0.5401	0.5320	0.058*
C26	0.0420 (13)	0.9166 (6)	0.1673 (9)	0.066 (3)
H26A	0.1535	0.8983	0.2142	0.079*
H26B	0.0501	0.9379	0.0970	0.079*
N1	−0.0797 (7)	0.7162 (4)	0.1679 (4)	0.0288 (12)
N2	−0.0372 (7)	0.6683 (4)	0.4224 (4)	0.0297 (12)
O1	0.0927 (6)	0.5283 (4)	0.2458 (4)	0.0331 (11)
O2	0.2880 (6)	0.7612 (4)	0.3987 (4)	0.0372 (11)
Se1	−0.41129 (11)	0.27481 (7)	−0.16339 (7)	0.0561 (3)
H1	−0.5133	0.2804	−0.1676	0.084*
Se2	0.16624 (10)	0.29622 (6)	0.22268 (6)	0.0406 (2)
H2	0.1451	0.2297	0.2068	0.061*
Se3	0.50639 (12)	0.89915 (10)	0.88567 (7)	0.0660 (3)
H3	0.4248	0.9208	0.9027	0.099*
Se4	0.64728 (10)	0.88355 (6)	0.48096 (7)	0.0435 (2)
H4	0.7125	0.9397	0.5105	0.065*
Zn1	0.08132 (11)	0.67103 (7)	0.30778 (7)	0.0407 (2)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
C3	0.025 (3)	0.026 (3)	0.022 (3)	−0.005 (3)	0.008 (3)	−0.002 (3)
C4	0.024 (3)	0.031 (3)	0.027 (3)	−0.002 (3)	0.010 (3)	0.001 (3)
C5	0.028 (3)	0.026 (3)	0.026 (3)	0.002 (3)	0.007 (3)	0.004 (3)
C6	0.028 (3)	0.032 (4)	0.027 (3)	0.002 (3)	0.012 (3)	0.002 (3)
C8	0.038 (4)	0.041 (4)	0.023 (3)	0.011 (3)	0.011 (3)	0.000 (3)
C9	0.036 (4)	0.037 (4)	0.029 (4)	−0.002 (3)	0.015 (3)	0.001 (3)
C10	0.028 (4)	0.039 (4)	0.035 (4)	−0.002 (3)	0.008 (3)	0.001 (3)
C12	0.029 (3)	0.031 (4)	0.030 (4)	0.003 (3)	0.004 (3)	−0.002 (3)
C13	0.029 (3)	0.026 (3)	0.030 (4)	0.002 (3)	0.003 (3)	−0.004 (3)
C14	0.028 (4)	0.040 (4)	0.037 (4)	0.008 (3)	−0.003 (3)	−0.009 (3)
C15	0.028 (3)	0.029 (4)	0.037 (4)	0.003 (3)	0.006 (3)	0.000 (3)
C16	0.033 (4)	0.046 (4)	0.029 (4)	0.006 (3)	−0.002 (3)	−0.012 (3)
C17	0.043 (4)	0.023 (3)	0.039 (4)	0.004 (3)	0.002 (3)	0.002 (3)
C18	0.050 (5)	0.035 (4)	0.076 (6)	0.009 (4)	0.023 (4)	0.002 (4)
C19	0.046 (5)	0.035 (4)	0.090 (7)	0.002 (4)	0.018 (5)	−0.009 (4)
C20	0.033 (4)	0.022 (3)	0.032 (4)	−0.005 (3)	0.012 (3)	−0.003 (3)
C21	0.026 (3)	0.035 (4)	0.030 (4)	0.002 (3)	0.004 (3)	−0.002 (3)
C22	0.026 (3)	0.032 (4)	0.030 (4)	−0.007 (3)	0.005 (3)	−0.005 (3)
C23	0.043 (5)	0.048 (5)	0.055 (5)	−0.011 (4)	0.021 (4)	−0.014 (4)
C24	0.039 (4)	0.047 (5)	0.060 (5)	−0.009 (3)	0.023 (4)	0.002 (4)
C25	0.037 (4)	0.066 (5)	0.041 (4)	−0.010 (4)	0.019 (3)	0.000 (4)
C26	0.076 (7)	0.038 (5)	0.100 (8)	0.006 (4)	0.052 (6)	0.008 (5)
N1	0.033 (3)	0.024 (3)	0.028 (3)	0.002 (2)	0.007 (2)	0.004 (2)
N2	0.031 (3)	0.030 (3)	0.025 (3)	−0.003 (2)	0.007 (2)	−0.002 (2)
O1	0.034 (3)	0.033 (3)	0.026 (2)	0.004 (2)	0.003 (2)	−0.005 (2)
O2	0.035 (3)	0.043 (3)	0.030 (3)	−0.009 (2)	0.011 (2)	−0.006 (2)
Se1	0.0466 (5)	0.0481 (5)	0.0492 (5)	−0.0046 (4)	−0.0123 (4)	−0.0193 (4)
Se2	0.0428 (4)	0.0318 (4)	0.0409 (4)	0.0097 (3)	0.0028 (3)	0.0024 (3)
Se3	0.0512 (5)	0.1048 (8)	0.0278 (4)	0.0108 (5)	−0.0035 (4)	−0.0202 (4)
Se4	0.0340 (4)	0.0438 (5)	0.0533 (5)	−0.0036 (3)	0.0181 (3)	0.0005 (4)
Zn1	0.0417 (5)	0.0415 (5)	0.0346 (5)	0.0002 (4)	0.0088 (4)	−0.0034 (4)

Geometric parameters (Å, º) top

C3—O1	1.290 (7)	C17—H17	0.9800
C3—C6	1.405 (9)	C18—C19	1.509 (12)
C3—C4	1.432 (9)	C18—H18A	0.9700
C4—C21	1.413 (9)	C18—H18B	0.9700
C4—C5	1.429 (9)	C19—C26	1.518 (12)
C5—N1	1.276 (8)	C19—H19A	0.9700
C5—H5	0.9300	C19—H19B	0.9700
C6—C20	1.361 (9)	C20—C22	1.386 (9)
C6—Se2	1.896 (6)	C20—H20	0.9300
C8—C16	1.356 (10)	C21—C22	1.368 (9)
C8—C12	1.393 (9)	C21—H21	0.9300
C8—H8	0.9300	C22—Se1	1.900 (6)
C9—N2	1.272 (8)	C23—C24	1.545 (10)
C9—C12	1.452 (9)	C23—H23A	0.9700
C9—H9	0.9300	C23—H23B	0.9700
C10—N2	1.472 (8)	C24—C25	1.530 (11)
C10—C23	1.518 (10)	C24—H24A	0.9700
C10—C25	1.522 (10)	C24—H24B	0.9700
C10—H10	0.9800	C25—H25A	0.9700
C12—C13	1.416 (9)	C25—H25B	0.9700
C13—O2	1.299 (8)	C26—H26A	0.9700
C13—C15	1.420 (9)	C26—H26B	0.9700
C14—C15	1.380 (9)	Zn1—N1	2.002 (5)
C14—C16	1.384 (11)	Zn1—N2	1.987 (5)
C14—H14	0.9300	Zn1—O1	1.908 (4)
C15—Se4	1.883 (7)	Zn1—O2	1.911 (4)
C16—Se3	1.902 (7)	Se1—H1	0.8200
C17—N1	1.470 (8)	Se2—H2	0.8200
C17—C18	1.519 (11)	Se3—H3	0.8200
C17—C26	1.522 (11)	Se4—H4	0.8200

O1—C3—C6	120.5 (6)	C18—C19—H19B	114.1
O1—C3—C4	123.8 (6)	C26—C19—H19B	114.1
C6—C3—C4	115.6 (5)	H19A—C19—H19B	111.3
C21—C4—C5	116.3 (6)	C6—C20—C22	118.6 (6)
C21—C4—C3	119.7 (6)	C6—C20—H20	120.7
C5—C4—C3	124.0 (6)	C22—C20—H20	120.7
N1—C5—C4	128.0 (6)	C22—C21—C4	120.6 (6)
N1—C5—H5	116.0	C22—C21—H21	119.7
C4—C5—H5	116.0	C4—C21—H21	119.7
C20—C6—C3	124.4 (6)	C21—C22—C20	120.9 (6)
C20—C6—Se2	118.2 (5)	C21—C22—Se1	120.6 (5)
C3—C6—Se2	117.5 (5)	C20—C22—Se1	118.3 (5)
C16—C8—C12	121.3 (7)	C10—C23—C24	86.9 (6)
C16—C8—H8	119.3	C10—C23—H23A	114.2
C12—C8—H8	119.3	C24—C23—H23A	114.2
N2—C9—C12	126.8 (6)	C10—C23—H23B	114.2
N2—C9—H9	116.6	C24—C23—H23B	114.2
C12—C9—H9	116.6	H23A—C23—H23B	111.3
N2—C10—C23	118.6 (6)	C25—C24—C23	88.1 (5)
N2—C10—C25	121.4 (6)	C25—C24—H24A	114.0
C23—C10—C25	89.4 (6)	C23—C24—H24A	114.0
N2—C10—H10	108.6	C25—C24—H24B	114.0
C23—C10—H10	108.6	C23—C24—H24B	114.0
C25—C10—H10	108.6	H24A—C24—H24B	111.2
C8—C12—C13	120.5 (6)	C10—C25—C24	87.4 (6)
C8—C12—C9	116.2 (6)	C10—C25—H25A	114.1
C13—C12—C9	123.3 (6)	C24—C25—H25A	114.1
O2—C13—C12	125.4 (6)	C10—C25—H25B	114.1
O2—C13—C15	118.6 (6)	C24—C25—H25B	114.1
C12—C13—C15	116.0 (6)	H25A—C25—H25B	111.3
C15—C14—C16	119.1 (6)	C19—C26—C17	88.0 (6)
C15—C14—H14	120.5	C19—C26—H26A	114.0
C16—C14—H14	120.5	C17—C26—H26A	114.0
C14—C15—C13	122.6 (6)	C19—C26—H26B	114.0
C14—C15—Se4	119.3 (5)	C17—C26—H26B	114.0
C13—C15—Se4	118.1 (5)	H26A—C26—H26B	111.2
C8—C16—C14	120.6 (6)	C5—N1—C17	118.3 (5)
C8—C16—Se3	121.0 (6)	C5—N1—Zn1	120.5 (4)
C14—C16—Se3	118.4 (5)	C17—N1—Zn1	121.0 (4)
N1—C17—C18	119.7 (6)	C9—N2—C10	118.7 (6)
N1—C17—C26	117.8 (6)	C9—N2—Zn1	123.1 (5)
C18—C17—C26	87.0 (6)	C10—N2—Zn1	118.2 (4)
N1—C17—H17	110.1	C3—O1—Zn1	125.6 (4)
C18—C17—H17	110.1	C13—O2—Zn1	125.8 (4)
C26—C17—H17	110.1	C22—Se1—H1	109.5
C19—C18—C17	88.5 (7)	C6—Se2—H2	109.5
C19—C18—H18A	113.9	C16—Se3—H3	109.5
C17—C18—H18A	113.9	C15—Se4—H4	109.5
C19—C18—H18B	113.9	O1—Zn1—O2	121.3 (2)
C17—C18—H18B	113.9	O1—Zn1—N2	113.3 (2)
H18A—C18—H18B	111.1	O2—Zn1—N2	94.9 (2)
C18—C19—C26	87.5 (6)	O1—Zn1—N1	94.9 (2)
C18—C19—H19A	114.1	O2—Zn1—N1	123.5 (2)
C26—C19—H19A	114.1	N2—Zn1—N1	109.6 (2)

Experimental details

Crystal data
Chemical formula	[Zn(C₁₁H₁₂NOSe₂)₂]
M_r	729.64
Crystal system, space group	Triclinic, P1
Temperature (K)	296
a, b, c (Å)	8.0876 (6), 12.2986 (16), 12.7956 (16)
α, β, γ (°)	93.166 (6), 108.216 (6), 95.716 (6)
V (Å³)	1197.9 (2)
Z	2
Radiation type	Mo Kα
µ (mm⁻¹)	7.12
Crystal size (mm)	0.32 × 0.28 × 0.25

Data collection
Diffractometer	Enraf–Nonius CAD-4 diffractometer
Absorption correction	ψ scan (North et al., 1968)
T_min, T_max	0.209, 0.269
No. of measured, independent and observed [I > 2σ(I)] reflections	6184, 4183, 3165
R_int	0.024
(sin θ/λ)_max (Å⁻¹)	0.595

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.046, 0.130, 1.05
No. of reflections	4183
No. of parameters	284
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.73, −1.48

Computer programs: CAD-4 Software (Enraf–Nonius, 1989), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Selected bond lengths (Å) top

Zn1—N1	2.002 (5)	Zn1—O1	1.908 (4)
Zn1—N2	1.987 (5)	Zn1—O2	1.911 (4)

Acknowledgements

The project was supported by the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry, Educational Commission of Hubei Province (D20091703) and the Natural Science Foundation of Hubei Province (2008CDB038).

References

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