Poly[[[diaqua­cobalt(II)]-bis­[μ2-1,1′-(butane-1,4-di­yl)diimidazole-κ2 N 3:N 3′]] dinitrate]

Yu Su; Chuan He; Zhi-Zhong Sun; Guang-Feng Hou; Jin-Sheng Gao

doi:10.1107/S1600536809005881

. 2009 Feb 25;65(Pt 3):m313–m314. doi: 10.1107/S1600536809005881

Poly[[[diaquacobalt(II)]-bis[μ₂-1,1′-(butane-1,4-diyl)diimidazole-κ² N ³:N ^3′]] dinitrate]

Yu Su ^a, Chuan He ^b, Zhi-Zhong Sun ^a, Guang-Feng Hou ^a, Jin-Sheng Gao ^a,^*

PMCID: PMC2968530 PMID: 21582089

Abstract

In the title compound, {[Co(C₁₀H₁₄N₄)₂(H₂O)₂](NO₃)₂}_n, the Co^II ion lies on an inversion center and is six-coordinated in an octahedral environment by four N atoms from four different 1,1′-butane-1,4-diyldiimidazole ligands and two O atoms from the two water molecules. The Co^II atoms are bridged by ligands, generating a two-dimensional (4,4)-network. Adjacent fishnet planes are linked to the nitrate anions via O—H⋯O hydrogen bonds, forming a three-dimensional supramolecular structure.

Related literature

For the synthesis of 1,1′-butane-1,4-diyldiimidazole, see: Ma et al. (2003 ▶); Yu et al. (2008 ▶) For a related Co complex, see: Dong & Zhang (2006 ▶).

Experimental

Crystal data

[Co(C₁₀H₁₄N₄)₂(H₂O)₂](NO₃)₂
M _r = 599.49
Triclinic,
a = 8.574 (7) Å
b = 8.692 (6) Å
c = 9.666 (5) Å
α = 104.71 (2)°
β = 97.14 (3)°
γ = 98.89 (3)°
V = 678.2 (8) Å³
Z = 1
Mo Kα radiation
μ = 0.70 mm⁻¹
T = 291 K
0.45 × 0.28 × 0.26 mm

Data collection

Rigaku R-AXIS RAPID diffractometer
Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ▶) T _min = 0.745, T _max = 0.842
6717 measured reflections
3073 independent reflections
2888 reflections with I > 2σ(I)
R _int = 0.015

Refinement

R[F ² > 2σ(F ²)] = 0.031
wR(F ²) = 0.096
S = 1.16
3073 reflections
178 parameters
H-atom parameters constrained
Δρ_max = 0.35 e Å⁻³
Δρ_min = −0.22 e Å⁻³

Data collection: RAPID-AUTO (Rigaku, 1998 ▶); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002 ▶); 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: SHELXL97.

Supplementary Material

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809005881/ng2547sup1.cif

e-65-0m313-sup1.cif^{(17.2KB, cif)}

Structure factors: contains datablocks I. DOI: 10.1107/S1600536809005881/ng2547Isup2.hkl

e-65-0m313-Isup2.hkl^{(150.8KB, hkl)}

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Table 1. Selected geometric parameters (Å, °).

Co1—N3	2.109 (2)
Co1—N1	2.1697 (18)
Co1—O1	2.1838 (16)

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N3—Co1—N1	86.99 (7)
N3—Co1—O1	90.67 (7)
N1—Co1—O1	89.79 (6)

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Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H15⋯O4ⁱ	0.85	1.94	2.775 (3)	167
O1—H16⋯O2ⁱⁱ	0.85	2.09	2.930 (3)	171

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Symmetry codes: (i) Inline graphic ; (ii) .

Acknowledgments

The authors thank Heilongjiang University for supporting this study.

supplementary crystallographic information

Comment

The 1,1'-butane-1,4-diyldiimidazole as a flexible ligand exhibit a variety of supramolecular aggregation patterns (Ma et al., 2003; Dong et al., 2006; Yu et al., 2008). In this paper, we report the new title compound, (I), synthssized by the reaction of 1,1'-butane-1,4-diyldiimidazole ligand and cobalt dinitrate in aqua solution.

In (I), each Co^II atom is located on a inversion centre and is six-coordinated in an octahedral environment by four N atoms from four different 1,1'-butane-1,4-diyldiimidazole ligands and two O atoms form the two water molecules (Fig. 1). The Co—N and Co—O distances are normal (Table 1). The Co^II atoms are bridged by ligands, generating a two-dimensional (4,4)-network (Fig. 2).

In the crystal, a R₄⁴(12) motif is built up by O—H···O hydrogen bonding interaction between the uncoordinated nitrate anions and the coordinated water molecules,which linke the adjacent fishnet planes to a three-dimensional supramolecular structure (Fig. 3, Table 2).

Experimental

1,1'-Butane-1,4-diyldiimidazole ligand was prepared from imidazole and 1,4-dibromobutane in DMSO (Ma et al., 2003a). 1,1'-Butane-1,4-diyldiimidazole (0.76 g, 4 mmol) and cobalt dinitrate (0.73 g, 4 mmol) were dissolved in hot aqua solution (10 ml) to give a clear solution. The resulting solution was allowed to stand in a desiccator at room temperature for a week, pink crystals of (I) were obtained.