Bis[2-acetyl-3-methyl­pyrazine (2-hydroxy­benzo­yl)hydrazonato]zinc(II) monohydrate

Tai, X.-S.; Feng, Y.-M.; Zhang, H.-X.

doi:10.1107/S1600536808009707

metal-organic compounds

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ISSN: 2056-9890

Volume 64| Part 5| May 2008| Page m656

doi:10.1107/S1600536808009707

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Bis[2-acetyl-3-methylpyrazine (2-hydroxybenzoyl)hydrazonato]zinc(II) monohydrate

Xi-Shi Tai,^a ^* Yi-Min Feng ^a and Hua-Xiang Zhang ^a

^aDepartment of Chemistry, Weifang University, Weifang 261061, People's Republic of China
^*Correspondence e-mail: taixishi@lzu.edu.cn

(Received 7 April 2008; accepted 8 April 2008; online 10 April 2008)

In the title compound, [Zn(C₁₄H₁₃N₄O₂)₂]·H₂O, the Zn^II centre is six-coordinated by four N and two O donors of two 2-acetyl-3-methylpyrazine (2-hydroxybenzoyl)hydrazonate ligands, and forms a distorted octahedral structure.

Related literature

For related literature, see: Herzfeld & Nagy (1999 ); Xi-Shi & Yi-Min (2008 ); Tai et al. (2003 ); Tai et al. (2008 ); Tai, Feng, Kong, Wang & Tan (2007 ); Tai, Yin & Feng (2007 ); Tai, Yin & Hao (2007 ); Tai, Yin, Feng & Kong (2007 ); Wang et al. (2007 ).

Experimental

Crystal data

[Zn(C₁₄H₁₃N₄O₂)₂]·H₂O
M_r = 621.95
Monoclinic, P 2₁ /n
a = 9.3794 (10) Å
b = 22.814 (2) Å
c = 13.9407 (14) Å
β = 106.402 (2)°
V = 2861.6 (5) Å³
Z = 4
Mo Kα radiation
μ = 0.91 mm⁻¹
T = 298 (2) K
0.32 × 0.20 × 0.16 mm

Data collection

Bruker SMART CCD area-detector diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2000 ) T_min = 0.759, T_max = 0.868
14227 measured reflections
5043 independent reflections
2831 reflections with I > 2σ(I)
R_int = 0.076

Refinement

R[F² > 2σ(F²)] = 0.047
wR(F²) = 0.128
S = 1.01
5043 reflections
379 parameters
H-atom parameters constrained
Δρ_max = 0.38 e Å⁻³
Δρ_min = −0.35 e Å⁻³

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); 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); software used to prepare material for publication: SHELXTL.

Supporting information

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536808009707/at2559sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536808009707/at2559Isup2.hkl

checkCIF report

Comment top

Schiff-base ligands are able to coordinate metals through imine nitrogen and another group, usually linked to the aldehyde. Modern chemists still prepare Schiff-bases, and nowadays active and well designed Schiff-base ligands are considered to be "privileged ligands" (Tai & Feng, 2008; Tai, Feng, Kong, Wang & Tan, 2007; Tai et al., 2008; Tai, Yin & Feng, 2007; Tai, Yin, Feng & Kong, 2007; Tai, Yin & Hao, 2007; Tai et al., 2003; Wang et al., 2007). In fact, Schiff bases are able to stabilize many different metals in various oxidation states. Schiff bases and their metal complexes play a key role in understanding the coordination chemistry of transition metal ions (Tai et al., 2003). In particular, the bidentate ligands containing imine groups have been used as modulators of structural, electronic, antitumor activity and fluorescence properties of transition metal centres (Herzfeld & Nagy, 1999). In order to investigate further the coordination and the properties of zinc complexes with Schiff bases ligands, as parts of our studies on the synthesis, characterization and properties of Schiff bases ligands and their metal complexes, we herein report the synthesis and structural characterization of a new zinc complex, Zn(2-acetyl-3-methylpyrazine salicyloyl hydrazone), (I).

The title compound consists of neutral complex, Zn[2-acetyl-3-methylpyrazine (2-hydroxybenzoyl)hydrazone]. The Zn^II center is six-coordinate with four N and two O donors of 2-acetyl-3-methylpyrazine (2-hydroxybenzoyl)hydrazonate, and forms a distorted octahedron structure. The Zn—O and Zn—N bond lengths are in the ranges 2.055 (3)–2.079 (3) and 2.239 (4)–2.283 (3) Å, respectively. The Zn—O bond lengths are much shorter than Zn—N, which shows that the Zn—O bonds are stronger than the Zn—N bonds.

Related literature top

For related literature, see: Herzfeld & Nagy (1999); Xi-Shi & Yi-Min (2008); Tai et al. (2003); Tai et al. (2008); Tai, Feng, Kong, Wang & Tan (2007); Tai, Yin & Feng (2007); Tai, Yin & Hao (2007); Tai, Yin, Feng & Kong (2007); Wang et al. (2007).

Experimental top

The title compound was prepared as following: 1 mmol of Zn^II acetate was added to the solution of 2-acetyl-3-methylpyrazine salicyloyl hydrazone (1 mmol) in a 10 ml of CH₃CH₂OH. The mixture was continuously stirred for 3 h at refluxing temperature, evaporating some ethanol, then the product was collected by filtration, yield 68%. The single-crystal suitable for X-ray determination was obtained by evaporation from ethanol solution after two weeks. A ethanol solution of the title compound was slowly evaporated and pale crystals were obtained after a weeks.

Computing details top

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); 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 molecule of the title compound, with 30% probabiility ellipsoids.

Bis[2-acetyl-3-methylpyrazine (2-hydroxybenzoyl)hydrazonato]zinc(II) monohydrate top

Crystal data top

[Zn(C₁₄H₁₃N₄O₂)₂]·H₂O	F(000) = 1288
M_r = 621.95	D_x = 1.444 Mg m⁻³
Monoclinic, P2₁/n	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2yn	Cell parameters from 2538 reflections
a = 9.3794 (10) Å	θ = 2.4–22.4°
b = 22.814 (2) Å	µ = 0.91 mm⁻¹
c = 13.9407 (14) Å	T = 298 K
β = 106.402 (2)°	Tabular, colourless
V = 2861.6 (5) Å³	0.32 × 0.20 × 0.16 mm
Z = 4

Data collection top

Bruker SMART CCD area-detector diffractometer	5043 independent reflections
Radiation source: fine-focus sealed tube	2831 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.077
ϕ and ω scans	θ_max = 25.0°, θ_min = 1.8°
Absorption correction: multi-scan (SADABS; Bruker, 2000)	h = −9→11
T_min = 0.759, T_max = 0.868	k = −27→23
14227 measured reflections	l = −16→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)] = 0.047	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.128	H-atom parameters constrained
S = 1.02	w = 1/[σ²(F_o²) + (0.0366P)² + 2.1233P] where P = (F_o² + 2F_c²)/3
5043 reflections	(Δ/σ)_max < 0.001
379 parameters	Δρ_max = 0.38 e Å⁻³
0 restraints	Δρ_min = −0.35 e Å⁻³

Crystal data top

[Zn(C₁₄H₁₃N₄O₂)₂]·H₂O	V = 2861.6 (5) Å³
M_r = 621.95	Z = 4
Monoclinic, P2₁/n	Mo Kα radiation
a = 9.3794 (10) Å	µ = 0.91 mm⁻¹
b = 22.814 (2) Å	T = 298 K
c = 13.9407 (14) Å	0.32 × 0.20 × 0.16 mm
β = 106.402 (2)°

Data collection top

Bruker SMART CCD area-detector diffractometer	5043 independent reflections
Absorption correction: multi-scan (SADABS; Bruker, 2000)	2831 reflections with I > 2σ(I)
T_min = 0.759, T_max = 0.868	R_int = 0.077
14227 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.047	0 restraints
wR(F²) = 0.128	H-atom parameters constrained
S = 1.02	Δρ_max = 0.38 e Å⁻³
5043 reflections	Δρ_min = −0.35 e Å⁻³
379 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	0.09167 (6)	0.14093 (2)	0.53708 (4)	0.04641 (19)
N1	−0.0550 (4)	0.24903 (15)	0.5747 (2)	0.0414 (9)
N2	0.0653 (4)	0.23093 (15)	0.5435 (2)	0.0402 (9)
N3	0.2582 (4)	0.18422 (16)	0.4675 (3)	0.0443 (9)
N4	0.4647 (4)	0.2484 (2)	0.4049 (3)	0.0592 (11)
N5	0.2455 (4)	0.02711 (15)	0.5545 (3)	0.0461 (9)
N6	0.1370 (4)	0.05900 (16)	0.4881 (3)	0.0441 (9)
N7	−0.0643 (4)	0.12679 (16)	0.3845 (3)	0.0453 (9)
N8	−0.2259 (5)	0.1065 (2)	0.1898 (3)	0.0636 (12)
O1	−0.0809 (3)	0.14991 (13)	0.5998 (2)	0.0559 (9)
O2	−0.2266 (4)	0.32101 (14)	0.6299 (3)	0.0695 (10)
H2	−0.1514	0.3110	0.6151	0.104*
O3	0.2353 (3)	0.10277 (13)	0.6631 (2)	0.0512 (8)
O4	0.4380 (4)	−0.05320 (16)	0.6118 (3)	0.0852 (12)
H4	0.3692	−0.0353	0.5737	0.128*
O5	0.7000 (4)	0.3022 (2)	0.3185 (3)	0.1108 (16)
H5A	0.6191	0.2940	0.3316	0.133*
H5B	0.6838	0.3291	0.2746	0.133*
C1	−0.1183 (5)	0.2031 (2)	0.6046 (3)	0.0416 (11)
C2	−0.2467 (4)	0.21621 (19)	0.6431 (3)	0.0375 (10)
C3	−0.2931 (5)	0.2732 (2)	0.6550 (3)	0.0465 (11)
C4	−0.4143 (5)	0.2828 (2)	0.6926 (3)	0.0581 (13)
H4A	−0.4439	0.3208	0.7018	0.070*
C5	−0.4885 (5)	0.2362 (3)	0.7158 (3)	0.0608 (14)
H5	−0.5696	0.2429	0.7403	0.073*
C6	−0.4470 (5)	0.1797 (2)	0.7039 (4)	0.0610 (14)
H6	−0.4995	0.1483	0.7194	0.073*
C7	−0.3265 (5)	0.1706 (2)	0.6685 (3)	0.0511 (12)
H7	−0.2972	0.1323	0.6612	0.061*
C8	0.0648 (5)	0.32827 (19)	0.4706 (3)	0.0518 (12)
H8A	−0.0418	0.3268	0.4508	0.078*
H8B	0.0985	0.3432	0.4164	0.078*
H8C	0.0987	0.3535	0.5276	0.078*
C9	0.1257 (4)	0.26797 (19)	0.4972 (3)	0.0390 (10)
C10	0.2528 (4)	0.24350 (19)	0.4667 (3)	0.0401 (10)
C11	0.3614 (5)	0.2760 (2)	0.4387 (3)	0.0472 (11)
C12	0.3827 (5)	0.3412 (2)	0.4497 (4)	0.0720 (16)
H12A	0.4853	0.3506	0.4583	0.108*
H12B	0.3539	0.3543	0.5070	0.108*
H12C	0.3224	0.3603	0.3908	0.108*
C13	0.4634 (5)	0.1902 (3)	0.4027 (4)	0.0618 (14)
H13	0.5317	0.1706	0.3773	0.074*
C14	0.3641 (5)	0.1584 (2)	0.4370 (3)	0.0526 (12)
H14	0.3711	0.1177	0.4389	0.063*
C15	0.2860 (5)	0.0543 (2)	0.6433 (3)	0.0446 (11)
C16	0.4033 (5)	0.02364 (19)	0.7213 (3)	0.0447 (11)
C17	0.4738 (5)	−0.0274 (2)	0.7028 (4)	0.0594 (13)
C18	0.5834 (6)	−0.0531 (2)	0.7792 (4)	0.0769 (17)
H18	0.6309	−0.0867	0.7664	0.092*
C19	0.6226 (6)	−0.0297 (3)	0.8728 (5)	0.0829 (18)
H19	0.6953	−0.0479	0.9235	0.099*
C20	0.5561 (6)	0.0201 (3)	0.8929 (4)	0.0797 (17)
H20	0.5847	0.0364	0.9566	0.096*
C21	0.4463 (5)	0.0461 (2)	0.8181 (4)	0.0611 (14)
H21	0.3996	0.0795	0.8325	0.073*
C22	0.1358 (6)	−0.0146 (2)	0.3624 (4)	0.0896 (19)
H22A	0.2133	−0.0316	0.4154	0.134*
H22B	0.1733	−0.0061	0.3066	0.134*
H22C	0.0545	−0.0417	0.3421	0.134*
C23	0.0833 (5)	0.04049 (19)	0.3982 (3)	0.0436 (11)
C24	−0.0357 (5)	0.0788 (2)	0.3363 (3)	0.0440 (11)
C25	−0.1161 (5)	0.0696 (2)	0.2352 (4)	0.0555 (13)
C26	−0.0901 (6)	0.0220 (3)	0.1688 (4)	0.094 (2)
H26A	−0.1601	0.0257	0.1039	0.141*
H26B	−0.1026	−0.0154	0.1969	0.141*
H26C	0.0091	0.0251	0.1628	0.141*
C27	−0.2551 (5)	0.1511 (2)	0.2407 (4)	0.0602 (14)
H27	−0.3334	0.1760	0.2103	0.072*
C28	−0.1727 (5)	0.1623 (2)	0.3385 (4)	0.0517 (12)
H28	−0.1940	0.1951	0.3716	0.062*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Zn1	0.0521 (3)	0.0324 (3)	0.0577 (3)	0.0072 (3)	0.0202 (3)	0.0011 (3)
N1	0.040 (2)	0.031 (2)	0.057 (2)	0.0013 (17)	0.0200 (18)	0.0008 (18)
N2	0.039 (2)	0.034 (2)	0.049 (2)	0.0006 (17)	0.0148 (17)	0.0014 (17)
N3	0.042 (2)	0.043 (3)	0.050 (2)	0.0068 (18)	0.0173 (18)	0.0016 (18)
N4	0.046 (2)	0.066 (3)	0.068 (3)	−0.007 (2)	0.020 (2)	0.000 (2)
N5	0.050 (2)	0.031 (2)	0.053 (2)	0.0095 (18)	0.0082 (19)	0.0026 (19)
N6	0.044 (2)	0.039 (2)	0.049 (2)	0.0045 (18)	0.0115 (18)	0.0056 (19)
N7	0.044 (2)	0.036 (2)	0.057 (2)	0.0001 (18)	0.0151 (19)	0.0035 (19)
N8	0.062 (3)	0.064 (3)	0.059 (3)	0.005 (2)	0.007 (2)	0.007 (2)
O1	0.070 (2)	0.0278 (19)	0.083 (2)	0.0063 (16)	0.0433 (18)	0.0034 (16)
O2	0.073 (2)	0.040 (2)	0.108 (3)	0.0033 (18)	0.047 (2)	−0.010 (2)
O3	0.060 (2)	0.038 (2)	0.055 (2)	0.0091 (16)	0.0152 (16)	−0.0037 (16)
O4	0.105 (3)	0.067 (3)	0.070 (2)	0.047 (2)	0.004 (2)	−0.004 (2)
O5	0.083 (3)	0.131 (4)	0.118 (3)	0.007 (3)	0.028 (3)	0.042 (3)
C1	0.047 (3)	0.033 (3)	0.046 (3)	0.002 (2)	0.015 (2)	0.000 (2)
C2	0.038 (2)	0.038 (3)	0.037 (2)	−0.001 (2)	0.0099 (19)	−0.002 (2)
C3	0.048 (3)	0.040 (3)	0.054 (3)	0.003 (2)	0.017 (2)	−0.006 (2)
C4	0.056 (3)	0.051 (3)	0.072 (3)	0.018 (3)	0.025 (3)	−0.005 (3)
C5	0.053 (3)	0.076 (4)	0.060 (3)	0.005 (3)	0.028 (3)	−0.008 (3)
C6	0.061 (3)	0.059 (4)	0.073 (4)	−0.010 (3)	0.036 (3)	−0.008 (3)
C7	0.062 (3)	0.039 (3)	0.057 (3)	0.001 (2)	0.025 (3)	−0.005 (2)
C8	0.062 (3)	0.036 (3)	0.058 (3)	0.006 (2)	0.019 (2)	0.013 (2)
C9	0.040 (3)	0.036 (3)	0.040 (2)	−0.003 (2)	0.009 (2)	0.002 (2)
C10	0.042 (3)	0.036 (3)	0.040 (3)	0.000 (2)	0.008 (2)	0.004 (2)
C11	0.046 (3)	0.048 (3)	0.047 (3)	−0.004 (2)	0.011 (2)	0.000 (2)
C12	0.069 (4)	0.059 (4)	0.091 (4)	−0.020 (3)	0.028 (3)	−0.006 (3)
C13	0.048 (3)	0.069 (4)	0.075 (4)	0.005 (3)	0.027 (3)	−0.008 (3)
C14	0.051 (3)	0.048 (3)	0.062 (3)	0.008 (2)	0.021 (2)	−0.002 (2)
C15	0.043 (3)	0.035 (3)	0.057 (3)	−0.002 (2)	0.016 (2)	0.005 (2)
C16	0.051 (3)	0.031 (3)	0.050 (3)	0.000 (2)	0.010 (2)	0.007 (2)
C17	0.066 (3)	0.043 (3)	0.067 (3)	0.010 (3)	0.017 (3)	0.010 (3)
C18	0.080 (4)	0.055 (4)	0.085 (4)	0.028 (3)	0.007 (3)	0.018 (3)
C19	0.091 (4)	0.062 (4)	0.075 (4)	0.007 (3)	−0.012 (3)	0.022 (3)
C20	0.106 (5)	0.052 (4)	0.065 (4)	0.007 (3)	−0.001 (3)	0.011 (3)
C21	0.074 (4)	0.039 (3)	0.063 (3)	0.001 (3)	0.009 (3)	0.002 (3)
C22	0.122 (5)	0.052 (4)	0.075 (4)	0.032 (3)	−0.006 (3)	−0.015 (3)
C23	0.050 (3)	0.032 (3)	0.051 (3)	−0.003 (2)	0.016 (2)	0.001 (2)
C24	0.043 (3)	0.041 (3)	0.050 (3)	−0.003 (2)	0.016 (2)	0.005 (2)
C25	0.064 (3)	0.047 (3)	0.053 (3)	−0.008 (3)	0.013 (3)	0.002 (3)
C26	0.113 (5)	0.091 (5)	0.056 (3)	0.023 (4)	−0.010 (3)	−0.020 (3)
C27	0.042 (3)	0.065 (4)	0.071 (4)	0.003 (3)	0.012 (3)	0.020 (3)
C28	0.047 (3)	0.046 (3)	0.062 (3)	0.009 (2)	0.016 (3)	0.005 (2)

Geometric parameters (Å, º) top

Zn1—O1	2.055 (3)	C7—H7	0.9300
Zn1—N2	2.073 (3)	C8—C9	1.496 (6)
Zn1—N6	2.075 (4)	C8—H8A	0.9600
Zn1—O3	2.079 (3)	C8—H8B	0.9600
Zn1—N7	2.239 (4)	C8—H8C	0.9600
Zn1—N3	2.283 (3)	C9—C10	1.483 (6)
N1—C1	1.329 (5)	C10—C11	1.401 (6)
N1—N2	1.381 (4)	C11—C12	1.503 (6)
N2—C9	1.288 (5)	C12—H12A	0.9600
N3—C14	1.324 (5)	C12—H12B	0.9600
N3—C10	1.353 (5)	C12—H12C	0.9600
N4—C13	1.329 (6)	C13—C14	1.370 (6)
N4—C11	1.346 (5)	C13—H13	0.9300
N5—C15	1.341 (5)	C14—H14	0.9300
N5—N6	1.374 (4)	C15—C16	1.486 (6)
N6—C23	1.283 (5)	C16—C21	1.391 (6)
N7—C28	1.317 (5)	C16—C17	1.398 (6)
N7—C24	1.350 (5)	C17—C18	1.385 (6)
N8—C27	1.314 (6)	C18—C19	1.360 (7)
N8—C25	1.341 (6)	C18—H18	0.9300
O1—C1	1.270 (5)	C19—C20	1.363 (8)
O2—C3	1.351 (5)	C19—H19	0.9300
O2—H2	0.8200	C20—C21	1.376 (6)
O3—C15	1.264 (5)	C20—H20	0.9300
O4—C17	1.351 (6)	C21—H21	0.9300
O4—H4	0.8200	C22—C23	1.487 (6)
O5—H5A	0.8500	C22—H22A	0.9600
O5—H5B	0.8500	C22—H22B	0.9600
C1—C2	1.482 (6)	C22—H22C	0.9600
C2—C7	1.384 (6)	C23—C24	1.487 (6)
C2—C3	1.395 (6)	C24—C25	1.413 (6)
C3—C4	1.398 (6)	C25—C26	1.492 (7)
C4—C5	1.358 (7)	C26—H26A	0.9600
C4—H4A	0.9300	C26—H26B	0.9600
C5—C6	1.370 (7)	C26—H26C	0.9600
C5—H5	0.9300	C27—C28	1.388 (6)
C6—C7	1.372 (6)	C27—H27	0.9300
C6—H6	0.9300	C28—H28	0.9300

O1—Zn1—N2	76.41 (12)	N3—C10—C11	120.2 (4)
O1—Zn1—N6	119.26 (13)	N3—C10—C9	113.9 (4)
N2—Zn1—N6	160.85 (13)	C11—C10—C9	125.9 (4)
O1—Zn1—O3	94.73 (12)	N4—C11—C10	120.1 (4)
N2—Zn1—O3	115.77 (12)	N4—C11—C12	114.2 (4)
N6—Zn1—O3	75.91 (13)	C10—C11—C12	125.6 (4)
O1—Zn1—N7	92.09 (13)	C11—C12—H12A	109.5
N2—Zn1—N7	97.47 (13)	C11—C12—H12B	109.5
N6—Zn1—N7	72.39 (14)	H12A—C12—H12B	109.5
O3—Zn1—N7	146.75 (13)	C11—C12—H12C	109.5
O1—Zn1—N3	148.55 (13)	H12A—C12—H12C	109.5
N2—Zn1—N3	72.21 (13)	H12B—C12—H12C	109.5
N6—Zn1—N3	91.23 (13)	N4—C13—C14	121.6 (5)
O3—Zn1—N3	100.51 (12)	N4—C13—H13	119.2
N7—Zn1—N3	90.03 (12)	C14—C13—H13	119.2
C1—N1—N2	109.9 (3)	N3—C14—C13	121.4 (5)
C9—N2—N1	118.4 (3)	N3—C14—H14	119.3
C9—N2—Zn1	123.6 (3)	C13—C14—H14	119.3
N1—N2—Zn1	115.3 (2)	O3—C15—N5	125.5 (4)
C14—N3—C10	118.2 (4)	O3—C15—C16	119.9 (4)
C14—N3—Zn1	127.5 (3)	N5—C15—C16	114.6 (4)
C10—N3—Zn1	114.0 (3)	C21—C16—C17	117.6 (4)
C13—N4—C11	118.2 (4)	C21—C16—C15	119.2 (4)
C15—N5—N6	109.9 (4)	C17—C16—C15	123.2 (4)
C23—N6—N5	119.7 (4)	O4—C17—C18	118.1 (5)
C23—N6—Zn1	123.9 (3)	O4—C17—C16	122.1 (4)
N5—N6—Zn1	115.9 (3)	C18—C17—C16	119.8 (5)
C28—N7—C24	119.5 (4)	C19—C18—C17	120.8 (5)
C28—N7—Zn1	125.5 (3)	C19—C18—H18	119.6
C24—N7—Zn1	114.9 (3)	C17—C18—H18	119.6
C27—N8—C25	118.7 (4)	C18—C19—C20	120.6 (5)
C1—O1—Zn1	112.3 (3)	C18—C19—H19	119.7
C3—O2—H2	109.5	C20—C19—H19	119.7
C15—O3—Zn1	112.1 (3)	C19—C20—C21	119.4 (5)
C17—O4—H4	109.5	C19—C20—H20	120.3
H5A—O5—H5B	108.9	C21—C20—H20	120.3
O1—C1—N1	125.7 (4)	C20—C21—C16	121.8 (5)
O1—C1—C2	118.5 (4)	C20—C21—H21	119.1
N1—C1—C2	115.8 (4)	C16—C21—H21	119.1
C7—C2—C3	117.5 (4)	C23—C22—H22A	109.5
C7—C2—C1	119.6 (4)	C23—C22—H22B	109.5
C3—C2—C1	122.9 (4)	H22A—C22—H22B	109.5
O2—C3—C2	122.6 (4)	C23—C22—H22C	109.5
O2—C3—C4	117.0 (4)	H22A—C22—H22C	109.5
C2—C3—C4	120.3 (4)	H22B—C22—H22C	109.5
C5—C4—C3	119.4 (5)	N6—C23—C22	122.0 (4)
C5—C4—H4A	120.3	N6—C23—C24	113.4 (4)
C3—C4—H4A	120.3	C22—C23—C24	124.6 (4)
C4—C5—C6	121.7 (4)	N7—C24—C25	119.4 (4)
C4—C5—H5	119.1	N7—C24—C23	114.2 (4)
C6—C5—H5	119.1	C25—C24—C23	126.4 (4)
C5—C6—C7	118.6 (5)	N8—C25—C24	120.0 (5)
C5—C6—H6	120.7	N8—C25—C26	113.7 (4)
C7—C6—H6	120.7	C24—C25—C26	126.3 (5)
C6—C7—C2	122.5 (5)	C25—C26—H26A	109.5
C6—C7—H7	118.8	C25—C26—H26B	109.5
C2—C7—H7	118.8	H26A—C26—H26B	109.5
C9—C8—H8A	109.5	C25—C26—H26C	109.5
C9—C8—H8B	109.5	H26A—C26—H26C	109.5
H8A—C8—H8B	109.5	H26B—C26—H26C	109.5
C9—C8—H8C	109.5	N8—C27—C28	122.0 (5)
H8A—C8—H8C	109.5	N8—C27—H27	119.0
H8B—C8—H8C	109.5	C28—C27—H27	119.0
N2—C9—C10	113.6 (4)	N7—C28—C27	120.3 (5)
N2—C9—C8	122.5 (4)	N7—C28—H28	119.9
C10—C9—C8	123.8 (4)	C27—C28—H28	119.9

C1—N1—N2—C9	169.0 (4)	C3—C4—C5—C6	0.5 (7)
C1—N1—N2—Zn1	7.0 (4)	C4—C5—C6—C7	0.6 (8)
O1—Zn1—N2—C9	−166.9 (3)	C5—C6—C7—C2	−0.9 (7)
N6—Zn1—N2—C9	−20.1 (6)	C3—C2—C7—C6	0.2 (6)
O3—Zn1—N2—C9	104.4 (3)	C1—C2—C7—C6	−179.5 (4)
N7—Zn1—N2—C9	−76.6 (3)	N1—N2—C9—C10	−179.5 (3)
N3—Zn1—N2—C9	11.0 (3)	Zn1—N2—C9—C10	−19.0 (5)
O1—Zn1—N2—N1	−5.9 (2)	N1—N2—C9—C8	−3.9 (6)
N6—Zn1—N2—N1	140.9 (4)	Zn1—N2—C9—C8	156.6 (3)
O3—Zn1—N2—N1	−94.6 (3)	C14—N3—C10—C11	−2.9 (6)
N7—Zn1—N2—N1	84.5 (3)	Zn1—N3—C10—C11	171.5 (3)
N3—Zn1—N2—N1	172.1 (3)	C14—N3—C10—C9	177.0 (3)
O1—Zn1—N3—C14	177.5 (3)	Zn1—N3—C10—C9	−8.6 (4)
N2—Zn1—N3—C14	173.7 (4)	N2—C9—C10—N3	17.1 (5)
N6—Zn1—N3—C14	−16.1 (4)	C8—C9—C10—N3	−158.5 (4)
O3—Zn1—N3—C14	59.8 (4)	N2—C9—C10—C11	−162.9 (4)
N7—Zn1—N3—C14	−88.5 (4)	C8—C9—C10—C11	21.5 (6)
O1—Zn1—N3—C10	3.7 (4)	C13—N4—C11—C10	−2.5 (6)
N2—Zn1—N3—C10	−0.1 (3)	C13—N4—C11—C12	173.2 (4)
N6—Zn1—N3—C10	170.2 (3)	N3—C10—C11—N4	5.2 (6)
O3—Zn1—N3—C10	−114.0 (3)	C9—C10—C11—N4	−174.7 (4)
N7—Zn1—N3—C10	97.8 (3)	N3—C10—C11—C12	−169.9 (4)
C15—N5—N6—C23	179.7 (4)	C9—C10—C11—C12	10.1 (7)
C15—N5—N6—Zn1	7.7 (4)	C11—N4—C13—C14	−2.4 (7)
O1—Zn1—N6—C23	92.9 (3)	C10—N3—C14—C13	−1.9 (6)
N2—Zn1—N6—C23	−49.5 (6)	Zn1—N3—C14—C13	−175.4 (3)
O3—Zn1—N6—C23	−179.6 (4)	N4—C13—C14—N3	4.7 (7)
N7—Zn1—N6—C23	10.6 (3)	Zn1—O3—C15—N5	−5.1 (5)
N3—Zn1—N6—C23	−79.1 (3)	Zn1—O3—C15—C16	173.2 (3)
O1—Zn1—N6—N5	−95.5 (3)	N6—N5—C15—O3	−1.6 (6)
N2—Zn1—N6—N5	122.1 (4)	N6—N5—C15—C16	−180.0 (3)
O3—Zn1—N6—N5	−8.0 (3)	O3—C15—C16—C21	5.8 (6)
N7—Zn1—N6—N5	−177.8 (3)	N5—C15—C16—C21	−175.7 (4)
N3—Zn1—N6—N5	92.6 (3)	O3—C15—C16—C17	−174.3 (4)
O1—Zn1—N7—C28	54.9 (4)	N5—C15—C16—C17	4.1 (6)
N2—Zn1—N7—C28	−21.7 (4)	C21—C16—C17—O4	178.7 (4)
N6—Zn1—N7—C28	175.0 (4)	C15—C16—C17—O4	−1.1 (7)
O3—Zn1—N7—C28	156.8 (3)	C21—C16—C17—C18	−0.9 (7)
N3—Zn1—N7—C28	−93.7 (4)	C15—C16—C17—C18	179.3 (5)
O1—Zn1—N7—C24	−128.8 (3)	O4—C17—C18—C19	−178.9 (5)
N2—Zn1—N7—C24	154.6 (3)	C16—C17—C18—C19	0.7 (8)
N6—Zn1—N7—C24	−8.7 (3)	C17—C18—C19—C20	−1.0 (9)
O3—Zn1—N7—C24	−26.9 (4)	C18—C19—C20—C21	1.4 (9)
N3—Zn1—N7—C24	82.6 (3)	C19—C20—C21—C16	−1.6 (8)
N2—Zn1—O1—C1	3.6 (3)	C17—C16—C21—C20	1.3 (7)
N6—Zn1—O1—C1	−164.5 (3)	C15—C16—C21—C20	−178.9 (5)
O3—Zn1—O1—C1	119.0 (3)	N5—N6—C23—C22	−0.6 (6)
N7—Zn1—O1—C1	−93.6 (3)	Zn1—N6—C23—C22	170.7 (4)
N3—Zn1—O1—C1	−0.1 (4)	N5—N6—C23—C24	178.5 (3)
O1—Zn1—O3—C15	125.7 (3)	Zn1—N6—C23—C24	−10.2 (5)
N2—Zn1—O3—C15	−157.1 (3)	C28—N7—C24—C25	4.0 (6)
N6—Zn1—O3—C15	6.7 (3)	Zn1—N7—C24—C25	−172.5 (3)
N7—Zn1—O3—C15	24.6 (4)	C28—N7—C24—C23	−176.6 (4)
N3—Zn1—O3—C15	−81.9 (3)	Zn1—N7—C24—C23	6.8 (4)
Zn1—O1—C1—N1	−0.9 (5)	N6—C23—C24—N7	1.2 (5)
Zn1—O1—C1—C2	176.8 (3)	C22—C23—C24—N7	−179.7 (4)
N2—N1—C1—O1	−4.1 (6)	N6—C23—C24—C25	−179.4 (4)
N2—N1—C1—C2	178.2 (3)	C22—C23—C24—C25	−0.4 (7)
O1—C1—C2—C7	−2.9 (6)	C27—N8—C25—C24	0.8 (7)
N1—C1—C2—C7	175.0 (4)	C27—N8—C25—C26	−177.9 (5)
O1—C1—C2—C3	177.4 (4)	N7—C24—C25—N8	−3.9 (7)
N1—C1—C2—C3	−4.7 (6)	C23—C24—C25—N8	176.8 (4)
C7—C2—C3—O2	−178.0 (4)	N7—C24—C25—C26	174.6 (5)
C1—C2—C3—O2	1.7 (7)	C23—C24—C25—C26	−4.7 (8)
C7—C2—C3—C4	0.9 (6)	C25—N8—C27—C28	2.3 (7)
C1—C2—C3—C4	−179.4 (4)	C24—N7—C28—C27	−1.1 (6)
O2—C3—C4—C5	177.7 (4)	Zn1—N7—C28—C27	175.1 (3)
C2—C3—C4—C5	−1.3 (7)	N8—C27—C28—N7	−2.2 (7)

Experimental details

Crystal data
Chemical formula	[Zn(C₁₄H₁₃N₄O₂)₂]·H₂O
M_r	621.95
Crystal system, space group	Monoclinic, P2₁/n
Temperature (K)	298
a, b, c (Å)	9.3794 (10), 22.814 (2), 13.9407 (14)
β (°)	106.402 (2)
V (Å³)	2861.6 (5)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	0.91
Crystal size (mm)	0.32 × 0.20 × 0.16

Data collection
Diffractometer	Bruker SMART CCD area-detector diffractometer
Absorption correction	Multi-scan (SADABS; Bruker, 2000)
T_min, T_max	0.759, 0.868
No. of measured, independent and observed [I > 2σ(I)] reflections	14227, 5043, 2831
R_int	0.077
(sin θ/λ)_max (Å⁻¹)	0.595

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.047, 0.128, 1.02
No. of reflections	5043
No. of parameters	379
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.38, −0.35

Computer programs: SMART (Bruker, 2000), SAINT (Bruker, 2000), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Acknowledgements

The authors thank the National Natural Science Foundation of China (grant No. 20671073), the National Natural Science Foundation of Shandong (grant No. Y2007B60) and Weifang University for research grants.

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