catena-Poly[[bis­(nitrato-κO)cobalt(II)]-bis­[μ-1,4-bis­(pyridin-3-ylmeth­oxy)benzene-κ2N:N′]]

Liu, Y.; Zhang, H.-S.; Hou, G.-F.; Gao, J.-S.

doi:10.1107/S1600536811018630

metal-organic compounds

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ISSN: 2056-9890

Volume 67| Part 6| June 2011| Page m789

doi:10.1107/S1600536811018630

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catena-Poly[[bis(nitrato-κO)cobalt(II)]-bis[μ-1,4-bis(pyridin-3-ylmethoxy)benzene-κ²N:N′]]

Ying Liu,^a ^* Hong-Sen Zhang,^b Guang-Feng Hou ^c and Jin-Sheng Gao ^c

^aDepartment of Materials and Chemistry Engineering, Heilongjiang Institute of Technology, Harbin 150050, People's Republic of China, ^bModern Analysis, Test and Research Center, Heilongjiang Institute of Science and Technology, Harbin 150027, People's Republic of China, and ^cCollege of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, People's Republic of China
^*Correspondence e-mail: hgf1000@163.com

(Received 4 May 2011; accepted 17 May 2011; online 25 May 2011)

In the title compound, [Co(NO₃)₂(C₁₈H₁₆N₂O₂)₂]_n, the Co^II ion is located on an inversion center and is six-coordinated in an octahedral environment defined by four N atoms of the pyridine rings and two O atoms of the nitrate anions. The ligands link the Co^II ions into a linear chain running along [201]. One O atom of the nitrate ligand is disordered over two positions with site-occupancy factors of 0.59 (4) and 0.41 (4).

Related literature

For the synthesis and background to our study of flexible pyridyl-based aromatic ligands, see: Liu et al. (2010a ,b ); Yu et al. (2010 ). For the isotypic Cu(II) compound, see: Zou et al. (2011 ).

Experimental

Crystal data

[Co(NO₃)₂(C₁₈H₁₆N₂O₂)₂]
M_r = 767.61
Monoclinic, P 2₁ /c
a = 8.3864 (17) Å
b = 16.751 (3) Å
c = 13.273 (5) Å
β = 115.26 (2)°
V = 1686.3 (8) Å³
Z = 2
Mo Kα radiation
μ = 0.58 mm⁻¹
T = 291 K
0.21 × 0.19 × 0.17 mm

Data collection

Rigaku R-AXIS RAPID diffractometer
Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ) T_min = 0.888, T_max = 0.907
15667 measured reflections
3770 independent reflections
3176 reflections with I > 2σ(I)
R_int = 0.029

Refinement

R[F² > 2σ(F²)] = 0.035
wR(F²) = 0.093
S = 1.07
3770 reflections
251 parameters
12 restraints
H-atom parameters constrained
Δρ_max = 0.40 e Å⁻³
Δρ_min = −0.24 e Å⁻³

Table 1
Selected bond lengths (Å)

Co1—N2ⁱ	2.1307 (15)
Co1—O3	2.1682 (13)
Co1—N1	2.2016 (15)
Symmetry code: (i) -x, -y, -z+1.

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.

Supporting information

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811018630/ng5160sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536811018630/ng5160Isup2.hkl

checkCIF report

Comment top

The bridging compounds with rigid and flexible pyridyl-containing bidentate or multidentate organic spacers have assemble numerous interesting topology structures by coordination with metals and intermolecular supramolecular interaction. Our group focus attention on study of flexible pyridyl-based aromatic ligands, and obtained some isolated molecule, chain, plane and three-dimensional network structures (Liu et al., 2010a; Liu et al., 2010b; Yu et al., 2010). Herein, as a continuing work for pyridyl ligands, we report the synthesis and crystal structure of the title compound, which is a isomorphic compound of our previous report (Zou et al., 2011).

An asymmetric unit of the title compound consists of a 1,4-bis(pyridin-3-ylmethoxy)benzene molecule, a nitrate anion and a Co^II cation (Figure 1). The Co^II cation lie on an inversion center and is six-coordinated in the octahedral geometry environment defined by four N atoms of the pyridine derivatives and two O atoms of the nitrate anions (Table 1).

In the crystal, ribbon structures along [2 0 1] direction are built up by N-heterocyclic ligands linking Co^II cations (Figure 2).

Related literature top

For the synthesis and background to our study of flexible pyridyl-based

aromatic ligands, see: Liu et al. (2010a,b); Yu et al. (2010). For an isotypic isomorphic compound, see: Zou et al. (2011)

Experimental top

The 1,4-bis(pyridin-3-ylmethoxy)benzene ligand was synthesized as the reference method (Liu et al., 2010a): A mixture of 1,4-dihydroxybenzene (1.1 g, 10 mmol), 3-chloromethylpyridine hydrochloride (3.28 g, 20 mmol) and NaOH (1.6 g, 40 mmol) in acetonitrile (50 ml) was refluxed under nitrogen with stirring for 24 h. After cooling to room temperature, the solution was filtered and the residue was washed with acetonitrile for several times. The mixed filtrate was droped into 300 ml water solution to get the powder crude product. A total of 2.51 g (yield 86%) pure product was obtained by recrystallizing from the mixed solution of 10 ml water and 10 ml me thanol. The title compound was synthesized by reaction of 1,4-bis(pyridin-3-ylmethoxy)benzene ligand (0.29 g, 1.0 mmol) and Co(NO₃)₂^.6H₂O (0.29 g, 1.0 mmol) in 5 ml water and 5 ml me thanol mixed solution, and filtered after stirring for about 1 h. The filtate allowed to stand for four days under the room temperature to obtain pink block-like crystals suitable for X-ray analysis.

Computing details top

Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO (Rigaku, 1998); 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 (Sheldrick, 2008).

Figures top

	Fig. 1. The molecular structure of the title compound, showing displacement ellipsoids at the 50% probability level for non-H atoms, disordered O5' atom has been omitted for clarity, Symmetry codes: (I) -2 - x, -y, -z; (II) -2 + x, y, -1 + z; (III) -x, -y, 1 - z.
	Fig. 2. A partial packing view, showing the ribbon structure along [2 0 1] direction. Disordered O5' atoms and no involving H atoms have been omitted for clarity.

catena-Poly[[bis(nitrato-κO)cobalt(II)]-bis[µ-1,4- bis(pyridin-3-ylmethoxy)benzene-κ²N:N']] top

Crystal data top

[Co(NO₃)₂(C₁₈H₁₆N₂O₂)₂]	F(000) = 794
M_r = 767.61	D_x = 1.512 Mg m⁻³
Monoclinic, P2₁/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 13456 reflections
a = 8.3864 (17) Å	θ = 3.3–27.5°
b = 16.751 (3) Å	µ = 0.58 mm⁻¹
c = 13.273 (5) Å	T = 291 K
β = 115.26 (2)°	Block, red
V = 1686.3 (8) Å³	0.21 × 0.19 × 0.17 mm
Z = 2

Data collection top

Rigaku R-AXIS RAPID diffractometer	3770 independent reflections
Radiation source: fine-focus sealed tube	3176 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.029
ω scans	θ_max = 27.5°, θ_min = 3.3°
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	h = −10→10
T_min = 0.888, T_max = 0.907	k = −21→21
15667 measured reflections	l = −16→17

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)] = 0.035	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.093	H-atom parameters constrained
S = 1.07	w = 1/[σ²(F_o²) + (0.0468P)² + 0.568P] where P = (F_o² + 2F_c²)/3
3770 reflections	(Δ/σ)_max < 0.001
251 parameters	Δρ_max = 0.40 e Å⁻³
12 restraints	Δρ_min = −0.24 e Å⁻³

Crystal data top

[Co(NO₃)₂(C₁₈H₁₆N₂O₂)₂]	V = 1686.3 (8) Å³
M_r = 767.61	Z = 2
Monoclinic, P2₁/c	Mo Kα radiation
a = 8.3864 (17) Å	µ = 0.58 mm⁻¹
b = 16.751 (3) Å	T = 291 K
c = 13.273 (5) Å	0.21 × 0.19 × 0.17 mm
β = 115.26 (2)°

Data collection top

Rigaku R-AXIS RAPID diffractometer	3770 independent reflections
Absorption correction: multi-scan (ABSCOR; Higashi, 1995)	3176 reflections with I > 2σ(I)
T_min = 0.888, T_max = 0.907	R_int = 0.029
15667 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.035	12 restraints
wR(F²) = 0.093	H-atom parameters constrained
S = 1.07	Δρ_max = 0.40 e Å⁻³
3770 reflections	Δρ_min = −0.24 e Å⁻³
251 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	Occ. (<1)
Co1	−1.0000	0.0000	0.0000	0.02593 (10)
O1	−0.18789 (18)	−0.14784 (9)	0.32358 (15)	0.0595 (5)
O2	0.52403 (19)	−0.11163 (9)	0.58551 (15)	0.0593 (5)
O3	−1.20689 (16)	−0.06442 (7)	0.02231 (11)	0.0352 (3)
O4	−1.2179 (2)	−0.18994 (9)	−0.01783 (15)	0.0581 (4)
O5	−1.4545 (10)	−0.1223 (6)	−0.0743 (18)	0.063 (3)	0.41 (4)
N1	−0.78768 (18)	−0.07480 (9)	0.11956 (11)	0.0296 (3)
N2	0.98946 (18)	−0.07047 (8)	0.86365 (11)	0.0281 (3)
N3	−1.2934 (2)	−0.12828 (9)	−0.01457 (13)	0.0363 (3)
C1	−0.8314 (2)	−0.13113 (11)	0.17496 (15)	0.0346 (4)
H1	−0.9503	−0.1403	0.1556	0.041*
C2	−0.7088 (2)	−0.17610 (12)	0.25912 (15)	0.0380 (4)
H2	−0.7452	−0.2152	0.2945	0.046*
C3	−0.5319 (2)	−0.16281 (11)	0.29067 (14)	0.0353 (4)
H3	−0.4472	−0.1925	0.3476	0.042*
C4	−0.4826 (2)	−0.10430 (11)	0.23586 (14)	0.0318 (4)
C5	−0.6145 (2)	−0.06312 (10)	0.15006 (14)	0.0318 (4)
H5	−0.5813	−0.0253	0.1114	0.038*
C6	−0.2936 (2)	−0.08121 (12)	0.27107 (17)	0.0420 (5)
H6A	−0.2746	−0.0656	0.2066	0.050*
H6B	−0.2633	−0.0364	0.3222	0.050*
C7	−0.0111 (2)	−0.13537 (11)	0.38925 (16)	0.0379 (4)
C8	0.0822 (2)	−0.20193 (11)	0.44505 (16)	0.0358 (4)
H8	0.0244	−0.2504	0.4378	0.043*
C9	0.2614 (2)	−0.19664 (11)	0.51163 (15)	0.0353 (4)
H9	0.3245	−0.2416	0.5485	0.042*
C10	0.3463 (2)	−0.12396 (11)	0.52298 (15)	0.0372 (4)
C11	0.2531 (3)	−0.05720 (12)	0.46827 (18)	0.0438 (5)
H11	0.3105	−0.0085	0.4768	0.053*
C12	0.0744 (3)	−0.06280 (12)	0.40079 (18)	0.0440 (5)
H12	0.0117	−0.0180	0.3632	0.053*
C13	0.6332 (2)	−0.17831 (11)	0.62877 (16)	0.0394 (4)
H13A	0.6360	−0.2106	0.5689	0.047*
H13B	0.5902	−0.2109	0.6724	0.047*
C14	0.8133 (2)	−0.14676 (10)	0.70073 (14)	0.0314 (4)
C15	0.9609 (2)	−0.16228 (11)	0.68233 (15)	0.0379 (4)
H15	0.9519	−0.1924	0.6213	0.045*
C16	1.1220 (2)	−0.13215 (11)	0.75657 (16)	0.0381 (4)
H16	1.2228	−0.1416	0.7457	0.046*
C17	1.1322 (2)	−0.08808 (10)	0.84652 (15)	0.0317 (4)
H17	1.2418	−0.0698	0.8973	0.038*
C18	0.8350 (2)	−0.09926 (10)	0.79096 (14)	0.0298 (3)
H18	0.7352	−0.0866	0.8016	0.036*
O5'	−1.4489 (10)	−0.1298 (4)	−0.0282 (16)	0.065 (2)	0.59 (4)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Co1	0.01535 (16)	0.03043 (17)	0.02660 (16)	0.00104 (12)	0.00375 (12)	−0.00271 (12)
O1	0.0175 (7)	0.0419 (8)	0.0931 (12)	0.0015 (6)	−0.0013 (7)	0.0135 (8)
O2	0.0236 (8)	0.0371 (8)	0.0823 (11)	−0.0020 (6)	−0.0107 (7)	0.0046 (7)
O3	0.0260 (7)	0.0340 (7)	0.0433 (7)	−0.0036 (5)	0.0126 (5)	−0.0017 (5)
O4	0.0532 (10)	0.0361 (8)	0.0798 (11)	0.0038 (7)	0.0233 (9)	−0.0053 (7)
O5	0.022 (2)	0.072 (3)	0.078 (5)	−0.0074 (18)	0.006 (3)	−0.001 (3)
N1	0.0200 (7)	0.0342 (7)	0.0296 (7)	0.0021 (5)	0.0057 (6)	−0.0005 (5)
N2	0.0196 (7)	0.0311 (7)	0.0289 (7)	0.0012 (5)	0.0057 (5)	−0.0019 (5)
N3	0.0251 (8)	0.0375 (8)	0.0442 (8)	−0.0004 (6)	0.0126 (7)	0.0024 (6)
C1	0.0203 (9)	0.0422 (10)	0.0376 (9)	−0.0013 (7)	0.0090 (7)	0.0001 (7)
C2	0.0311 (10)	0.0434 (10)	0.0373 (9)	−0.0023 (8)	0.0125 (8)	0.0068 (7)
C3	0.0258 (10)	0.0418 (10)	0.0304 (8)	0.0041 (7)	0.0045 (7)	0.0063 (7)
C4	0.0199 (9)	0.0374 (9)	0.0329 (8)	0.0024 (7)	0.0064 (7)	0.0012 (7)
C5	0.0216 (9)	0.0350 (9)	0.0348 (8)	0.0024 (7)	0.0082 (7)	0.0053 (7)
C6	0.0196 (9)	0.0469 (11)	0.0503 (11)	0.0034 (8)	0.0060 (8)	0.0123 (8)
C7	0.0164 (9)	0.0434 (10)	0.0462 (10)	0.0015 (7)	0.0059 (7)	0.0062 (8)
C8	0.0248 (9)	0.0341 (9)	0.0441 (10)	−0.0027 (7)	0.0106 (8)	0.0039 (7)
C9	0.0250 (9)	0.0352 (9)	0.0370 (9)	0.0036 (7)	0.0047 (7)	0.0057 (7)
C10	0.0186 (9)	0.0406 (10)	0.0397 (9)	0.0001 (7)	0.0001 (7)	−0.0005 (7)
C11	0.0259 (10)	0.0345 (10)	0.0584 (12)	−0.0030 (7)	0.0059 (9)	0.0041 (8)
C12	0.0250 (10)	0.0361 (10)	0.0585 (12)	0.0056 (8)	0.0058 (9)	0.0120 (8)
C13	0.0255 (10)	0.0377 (10)	0.0407 (10)	0.0017 (7)	0.0003 (8)	−0.0080 (7)
C14	0.0229 (9)	0.0315 (8)	0.0315 (8)	0.0022 (7)	0.0038 (7)	−0.0022 (6)
C15	0.0336 (11)	0.0393 (10)	0.0382 (9)	0.0037 (8)	0.0128 (8)	−0.0091 (7)
C16	0.0266 (10)	0.0388 (10)	0.0505 (11)	0.0028 (7)	0.0182 (8)	−0.0058 (8)
C17	0.0198 (8)	0.0313 (9)	0.0381 (9)	0.0004 (6)	0.0067 (7)	−0.0019 (7)
C18	0.0182 (8)	0.0366 (9)	0.0302 (8)	0.0008 (6)	0.0059 (6)	−0.0024 (6)
O5'	0.0261 (19)	0.076 (2)	0.093 (5)	−0.0091 (15)	0.025 (2)	−0.003 (3)

Geometric parameters (Å, º) top

Co1—N2ⁱ	2.1307 (15)	C4—C5	1.386 (2)
Co1—N2ⁱⁱ	2.1307 (15)	C4—C6	1.500 (3)
Co1—O3	2.1682 (13)	C5—H5	0.9300
Co1—O3ⁱⁱⁱ	2.1682 (13)	C6—H6A	0.9700
Co1—N1	2.2016 (15)	C6—H6B	0.9700
Co1—N1ⁱⁱⁱ	2.2016 (15)	C7—C8	1.382 (3)
O1—C7	1.378 (2)	C7—C12	1.386 (3)
O1—C6	1.411 (2)	C8—C9	1.384 (3)
O2—C10	1.377 (2)	C8—H8	0.9300
O2—C13	1.402 (2)	C9—C10	1.386 (3)
O3—N3	1.2679 (19)	C9—H9	0.9300
O4—N3	1.222 (2)	C10—C11	1.380 (3)
O5—O5'	0.606 (9)	C11—C12	1.383 (3)
O5—N3	1.245 (7)	C11—H11	0.9300
N1—C1	1.340 (2)	C12—H12	0.9300
N1—C5	1.346 (2)	C13—C14	1.497 (2)
N2—C18	1.332 (2)	C13—H13A	0.9700
N2—C17	1.343 (2)	C13—H13B	0.9700
N2—Co1^iv	2.1307 (15)	C14—C18	1.384 (2)
N3—O5'	1.238 (5)	C14—C15	1.385 (3)
C1—C2	1.376 (3)	C15—C16	1.384 (3)
C1—H1	0.9300	C15—H15	0.9300
C2—C3	1.377 (3)	C16—C17	1.375 (3)
C2—H2	0.9300	C16—H16	0.9300
C3—C4	1.385 (3)	C17—H17	0.9300
C3—H3	0.9300	C18—H18	0.9300

N2ⁱ—Co1—N2ⁱⁱ	180.00 (7)	O1—C6—C4	107.92 (16)
N2ⁱ—Co1—O3	84.57 (5)	O1—C6—H6A	110.1
N2ⁱⁱ—Co1—O3	95.43 (5)	C4—C6—H6A	110.1
N2ⁱ—Co1—O3ⁱⁱⁱ	95.43 (5)	O1—C6—H6B	110.1
N2ⁱⁱ—Co1—O3ⁱⁱⁱ	84.57 (5)	C4—C6—H6B	110.1
O3—Co1—O3ⁱⁱⁱ	180.00 (9)	H6A—C6—H6B	108.4
N2ⁱ—Co1—N1	88.60 (6)	O1—C7—C8	115.30 (17)
N2ⁱⁱ—Co1—N1	91.40 (6)	O1—C7—C12	124.69 (17)
O3—Co1—N1	93.81 (5)	C8—C7—C12	120.00 (17)
O3ⁱⁱⁱ—Co1—N1	86.19 (5)	C7—C8—C9	120.22 (17)
N2ⁱ—Co1—N1ⁱⁱⁱ	91.40 (6)	C7—C8—H8	119.9
N2ⁱⁱ—Co1—N1ⁱⁱⁱ	88.60 (6)	C9—C8—H8	119.9
O3—Co1—N1ⁱⁱⁱ	86.19 (5)	C8—C9—C10	119.56 (17)
O3ⁱⁱⁱ—Co1—N1ⁱⁱⁱ	93.81 (5)	C8—C9—H9	120.2
N1—Co1—N1ⁱⁱⁱ	180.00 (13)	C10—C9—H9	120.2
C7—O1—C6	118.18 (15)	O2—C10—C11	114.82 (17)
C10—O2—C13	118.47 (15)	O2—C10—C9	124.82 (17)
N3—O3—Co1	136.62 (11)	C11—C10—C9	120.36 (17)
O5'—O5—N3	75.2 (11)	C10—C11—C12	119.99 (18)
C1—N1—C5	116.76 (15)	C10—C11—H11	120.0
C1—N1—Co1	118.02 (12)	C12—C11—H11	120.0
C5—N1—Co1	124.85 (11)	C11—C12—C7	119.86 (18)
C18—N2—C17	117.35 (15)	C11—C12—H12	120.1
C18—N2—Co1^iv	119.38 (11)	C7—C12—H12	120.1
C17—N2—Co1^iv	123.27 (11)	O2—C13—C14	106.54 (15)
O4—N3—O5'	120.5 (3)	O2—C13—H13A	110.4
O4—N3—O5	118.9 (5)	C14—C13—H13A	110.4
O5'—N3—O5	28.3 (4)	O2—C13—H13B	110.4
O4—N3—O3	120.46 (16)	C14—C13—H13B	110.4
O5'—N3—O3	117.9 (3)	H13A—C13—H13B	108.6
O5—N3—O3	117.7 (5)	C18—C14—C15	117.62 (16)
N1—C1—C2	123.13 (17)	C18—C14—C13	118.62 (16)
N1—C1—H1	118.4	C15—C14—C13	123.76 (16)
C2—C1—H1	118.4	C16—C15—C14	118.72 (16)
C1—C2—C3	119.57 (17)	C16—C15—H15	120.6
C1—C2—H2	120.2	C14—C15—H15	120.6
C3—C2—H2	120.2	C17—C16—C15	119.63 (17)
C2—C3—C4	118.62 (16)	C17—C16—H16	120.2
C2—C3—H3	120.7	C15—C16—H16	120.2
C4—C3—H3	120.7	N2—C17—C16	122.36 (16)
C3—C4—C5	118.15 (16)	N2—C17—H17	118.8
C3—C4—C6	122.12 (16)	C16—C17—H17	118.8
C5—C4—C6	119.62 (16)	N2—C18—C14	124.24 (16)
N1—C5—C4	123.73 (16)	N2—C18—H18	117.9
N1—C5—H5	118.1	C14—C18—H18	117.9
C4—C5—H5	118.1	O5—O5'—N3	76.5 (11)

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

Experimental details

Crystal data
Chemical formula	[Co(NO₃)₂(C₁₈H₁₆N₂O₂)₂]
M_r	767.61
Crystal system, space group	Monoclinic, P2₁/c
Temperature (K)	291
a, b, c (Å)	8.3864 (17), 16.751 (3), 13.273 (5)
β (°)	115.26 (2)
V (Å³)	1686.3 (8)
Z	2
Radiation type	Mo Kα
µ (mm⁻¹)	0.58
Crystal size (mm)	0.21 × 0.19 × 0.17

Data collection
Diffractometer	Rigaku R-AXIS RAPID diffractometer
Absorption correction	Multi-scan (ABSCOR; Higashi, 1995)
T_min, T_max	0.888, 0.907
No. of measured, independent and observed [I > 2σ(I)] reflections	15667, 3770, 3176
R_int	0.029
(sin θ/λ)_max (Å⁻¹)	0.649

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.035, 0.093, 1.07
No. of reflections	3770
No. of parameters	251
No. of restraints	12
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.40, −0.24

Computer programs: RAPID-AUTO (Rigaku, 1998), CrystalStructure (Rigaku/MSC, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Selected bond lengths (Å) top

Co1—N2ⁱ	2.1307 (15)	Co1—N1	2.2016 (15)
Co1—O3	2.1682 (13)

Symmetry code: (i) −x, −y, −z+1.

Acknowledgements

The authors thank Heilongjiang Institute of Technology and Heilongjiang University for supporting this work.

References

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