(Ethyl­enediamine-κ2 N,N)bis[2-(pyridin-2-yl-κN)-1,3-imidazol-1-ido-κN 1]cobalt(III) nitrate monohydrate

Xiu-Ling Feng; Yu-Ping Zhang

doi:10.1107/S1600536812032692

. 2012 Aug 8;68(Pt 9):m1155. doi: 10.1107/S1600536812032692

(Ethylenediamine-κ² N,N)bis[2-(pyridin-2-yl-κN)-1,3-imidazol-1-ido-κN ¹]cobalt(III) nitrate monohydrate

Xiu-Ling Feng ^a,^*, Yu-Ping Zhang ^b

PMCID: PMC3435583 PMID: 22969456

Abstract

In the title compound, [Co(C₈H₆N₃)₂(C₂H₈N₂)]NO₃·H₂O, the Co^III ion is coordinated by four N atoms from two 2-(pyridin-2-yl)-1,3-imidazol-1-ide ligands and two N atoms of ethylenediamine in a distorted octahedral geometry. In the crystal, classical N—H⋯N(O) and O—H⋯N(O) hydrogen bonds connect all the isolated components together to yield a three-dimensional structure.

Related literature

For examples of metal–organic compounds containing the 2-(2-pyridyl)imidazole ligand, see: Dosser & Underhill (1972 ▶); Lan et al. (2008 ▶). For applications of these compounds, see: Carranza et al. (2009 ▶); Schott et al. (2011 ▶).

Experimental

Crystal data

[Co(C₈H₆N₃)₂(C₂H₈N₂)]NO₃·H₂O
M _r = 487.38
Triclinic,
a = 8.6669 (5) Å
b = 11.0574 (8) Å
c = 12.5304 (10) Å
α = 76.133 (2)°
β = 75.672 (2)°
γ = 68.797 (1)°
V = 1069.62 (13) Å³
Z = 2
Mo Kα radiation
μ = 0.85 mm⁻¹
T = 298 K
0.45 × 0.38 × 0.30 mm

Data collection

Bruker SMART 1000 CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▶) T _min = 0.699, T _max = 0.783
5376 measured reflections
3714 independent reflections
2907 reflections with I > 2σ(I)
R _int = 0.021

Refinement

R[F ² > 2σ(F ²)] = 0.037
wR(F ²) = 0.110
S = 1.05
3714 reflections
289 parameters
?
Δρ_max = 0.32 e Å⁻³
Δρ_min = −0.42 e Å⁻³

Data collection: SMART (Bruker, 2007 ▶); cell refinement: SAINT (Bruker, 2007 ▶); 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.

Supplementary Material

Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536812032692/cv5321sup1.cif

e-68-m1155-sup1.cif^{(24KB, cif)}

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536812032692/cv5321Isup2.hkl

e-68-m1155-Isup2.hkl^{(182.1KB, hkl)}

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

Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N8—H8B⋯O1	0.90	2.16	2.922 (4)	142
N8—H8A⋯N5ⁱ	0.90	2.09	2.979 (3)	168
N7—H7A⋯N2ⁱⁱ	0.90	2.15	3.045 (3)	171
N7—H7B⋯O3ⁱⁱⁱ	0.90	2.43	3.281 (5)	158
O4—H4D⋯N2ⁱⁱⁱ	0.85	2.12	2.974 (7)	180
O4—H4C⋯O2^iv	0.85	2.18	3.026 (7)	179

Open in a new tab

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

Acknowledgments

The authors appreciate the help of Professor Dr Lidan Zhang and the financial support of the Science Foundation of Huaihua University (grant No. HHUQ.2009–10.).

supplementary crystallographic information

Comment

Organometallic complexes with the 2-(2-pyridyl)imidazole ligand (Dosser & Underhill, 1972; Lan et al., 2008) are intensively studied due to their magnetic properties (Carranza et al., 2009; Schott et al., 2011). Herewith we report the crystal structure of the title compound, (I) - a Co(III) complex with 2-(2-pyridyl)imidazolato ligands.

In (I) (Fig. 1), Co(III) ion is chelated by one ethylenediamine and two 2-(2-pyridyl)imidazolato ligands being coordinated by six N atoms in a distorted octahedral geometry. The bite angles of ethylenediamine and 2-(2-pyridyl)imidazolato chelate ligands to the cobalt atom are ca 84.72 (11)° and 89.02 (11)°, respectively. An extensive hydrogen-bonding network (Table 1) involving the N atoms of the ethylenediamine and 2-(2-pyridyl)imidazolato ligands, the water molecule and O atoms of nitrate anion interconnect all the isolated moieties together to yield a three-dimensional structure (Fig. 2).

Experimental

An ethanol solution (7 ml) of 2-(2-pyridyl)imidazole (0.5 mmol) was slowly added to an aqueous solution (8 ml) of Co(NO₃)₂.6H₂O (0.5 mmol) and ethylenediamine (2 mmol). Red block crystals were obtained after two months.