Bis[N′-(2-pyridylmethyl­ene-κN)benzo­hydrazide-κN′]bis­(thio­cyanato-κN)cobalt(II)

Datta, A.; Chuang, N.-T.; Huang, J.-H.; Lee, H.M.

doi:10.1107/S1600536809029006

metal-organic compounds

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ISSN: 2056-9890

Volume 65| Part 8| August 2009| Page m996

doi:10.1107/S1600536809029006

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Bis[N′-(2-pyridylmethylene-κN)benzohydrazide-κN′]bis(thiocyanato-κN)cobalt(II)

Amitabha Datta,^a Nien-Tsu Chuang,^a Jui-Hsien Huang ^a and Hon Man Lee ^a ^*

^aNational Changhua University of Education, Department of Chemistry, Changhua, Taiwan 50058
^*Correspondence e-mail: leehm@cc.ncue.edu.tw

(Received 17 July 2009; accepted 22 July 2009; online 25 July 2009)

In the title complex, [Co(NCS)₂(C₁₃H₁₁N₃O)₂], the Co^II centre adopts a distorted octahedral coordination geometry with two cis-bidentate Schiff base ligands and two cis thiocyanate ligands. The Schiff base ligand coordinates via the imine N and pyridine N atoms. The Co^II atom lies on a crystallographic twofold rotational axis. Non-classical intermolecular C—H⋯O hydrogen bonds link the complex molecules into chains along [001].

Related literature

For metal complexes of the same Schiff base, see: Basak et al. (2008 ); Chen et al. (2005 ); Christidis et al. (1999 ); Pal & Pal (2002 ); Paschalidis & Gdaniec (2004 ); Paschalidis et al. (2000 ); Pelagatti et al. (2000 ); Pouralimardan et al. (2007 ); Ogata et al. (2008 ).

Experimental

Crystal data

[Co(NCS)₂(C₁₃H₁₁N₃O)₂]
M_r = 625.59
Monoclinic, C 2/c
a = 17.112 (10) Å
b = 10.256 (6) Å
c = 17.945 (15) Å
β = 117.50 (3)°
V = 2794 (3) Å³
Z = 4
Mo Kα radiation
μ = 0.81 mm⁻¹
T = 150 K
0.19 × 0.18 × 0.10 mm

Data collection

Bruker SMART APEXII diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ) T_min = 0.862, T_max = 0.924
15579 measured reflections
2742 independent reflections
1666 reflections with I > 2σ
R_int = 0.119

Refinement

R[F² > 2σ(F²)] = 0.040
wR(F²) = 0.100
S = 0.97
2742 reflections
186 parameters
H-atom parameters constrained
Δρ_max = 0.60 e Å⁻³
Δρ_min = −0.55 e Å⁻³

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C13—H13⋯O1ⁱ	0.95	2.50	3.335 (5)	146
Symmetry code: (i) $[x, -y+2, z+{\script{1\over 2}}]$ .

Data collection: APEX2 (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: DIAMOND (Brandenburg, 1999 ).

Supporting information

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536809029006/pv2186sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536809029006/pv2186Isup2.hkl

checkCIF report

Comment top

The Schiff base, N'-(pyridin-2-ylmethylene)benzohydrazide, reacts with cobalt acetate tetrahydrate and sodium thiocyanate in water/methanol mixture to afford the tilte complex, (I). The cobalt atom lies on a crystallographic 2-fold rotational axis. The complex (I) adopts octahedral coordination geometry with the two bidentate Schiff base ligands being cis to each other (Fig. 1). The Schiff base coordinates via the imine N and pyridine N atoms. The two thiocyanate ligands are also cis to each other.

Metal complexes of the same Schiff base ligand have been reported in the literature (Basak et al. 2008; Chen et al. 2005; Christidis, et al. 1999; Pal & Pal, 2002; Paschalidis & Gdaniec, 2004; Paschalidis et al. 2000; Pelagatti et al. 2000; Pouralimardan, et al. 2007; Ogata et al. 2008).

Non-classical intermolecular H-bonds of the type C—H···O exist (Table 1). These H-bonds link the complex into one-dimensional hydrogen bonded chains (Fig. 2).

Related literature top

For metal complexes of the same Schiff base, see: Basak et al. (2008); Chen et al. (2005); Christidis et al. (1999); Pal & Pal (2002); Paschalidis & Gdaniec (2004); Paschalidis et al. (2000); Pelagatti et al. (2000); Pouralimardan et al. (2007); Ogata et al. (2008).

Experimental top

To a methanolic solution (20 ml) of cobalt acetate tetrahydrate (0.249 g, 1.00 mmol), a solution of N'-(pyridin-2-ylmethylene)benzohydrazide (1.00 mmol) was added, followed by the addition with constant stirring of a solution of sodium thiocyanate (0.162 g, 2.00 mmol) in a minimum volume of water/methanol mixture. The resultant solution was kept at room temperature yielding orange crystals suitable for X-ray diffraction after a few days. Crystals of (I) were isolated by filtration and were air-dried.

Computing details top

Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); 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: DIAMOND (Brandenburg, 1999).

Figures top

	Fig. 1. The structure of the title complex, showing 50% displacement ellipsoids for non-H atoms. The H atoms are dipicted by circles of an arbitrary radius. Unlabeled atoms of the complex are related to the labeled atoms by: -x, y, 0.5 - z.
	Fig. 2. A packing diagram of the title compound along the a axis showing the intermolecular hydrogen bonds (dashed lines).

Bis[N'-(2-pyridylmethylene-κN)benzohydrazide- κN']bis(thiocyanato-κN)cobalt(II) top

Crystal data top

[Co(NCS)₂(C₁₃H₁₁N₃O)₂]	F(000) = 1284
M_r = 625.59	D_x = 1.487 Mg m⁻³
Monoclinic, C2/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2yc	Cell parameters from 2526 reflections
a = 17.112 (10) Å	θ = 2.4–22.3°
b = 10.256 (6) Å	µ = 0.81 mm⁻¹
c = 17.945 (15) Å	T = 150 K
β = 117.50 (3)°	Tubular, orange
V = 2794 (3) Å³	0.19 × 0.18 × 0.10 mm
Z = 4

Data collection top

Bruker SMART APEXII diffractometer	2742 independent reflections
Radiation source: fine-focus sealed tube	1666 reflections with I > 2σ
Graphite monochromator	R_int = 0.119
ω scans	θ_max = 26.0°, θ_min = 2.4°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −21→21
T_min = 0.862, T_max = 0.924	k = −12→12
15579 measured reflections	l = −22→22

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)] = 0.040	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.100	H-atom parameters constrained
S = 0.97	w = 1/[σ²(F_o²) + (0.0417P)²] where P = (F_o² + 2F_c²)/3
2742 reflections	(Δ/σ)_max < 0.001
186 parameters	Δρ_max = 0.60 e Å⁻³
0 restraints	Δρ_min = −0.55 e Å⁻³

Crystal data top

[Co(NCS)₂(C₁₃H₁₁N₃O)₂]	V = 2794 (3) Å³
M_r = 625.59	Z = 4
Monoclinic, C2/c	Mo Kα radiation
a = 17.112 (10) Å	µ = 0.81 mm⁻¹
b = 10.256 (6) Å	T = 150 K
c = 17.945 (15) Å	0.19 × 0.18 × 0.10 mm
β = 117.50 (3)°

Data collection top

Bruker SMART APEXII diffractometer	2742 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	1666 reflections with I > 2σ
T_min = 0.862, T_max = 0.924	R_int = 0.119
15579 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.040	0 restraints
wR(F²) = 0.100	H-atom parameters constrained
S = 0.97	Δρ_max = 0.60 e Å⁻³
2742 reflections	Δρ_min = −0.55 e Å⁻³
186 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
Co1	0.0000	0.87355 (6)	0.2500	0.0423 (2)
S1	−0.23413 (6)	0.57257 (9)	0.08021 (6)	0.0655 (3)
O1	0.08519 (16)	0.8442 (2)	0.02024 (13)	0.0694 (7)
N1	−0.00183 (16)	0.8085 (3)	0.08164 (14)	0.0517 (7)
H1A	−0.0481	0.7640	0.0762	0.062*
N2	0.03351 (16)	0.8912 (2)	0.14860 (13)	0.0429 (6)
N3	0.09438 (15)	1.0297 (2)	0.28764 (13)	0.0416 (6)
N4	−0.09755 (18)	0.7417 (3)	0.18238 (16)	0.0555 (7)
C1	−0.1101 (2)	0.6416 (3)	−0.05536 (17)	0.0510 (8)
H1	−0.1368	0.6775	−0.0239	0.061*
C2	−0.1537 (2)	0.5487 (4)	−0.1162 (2)	0.0620 (10)
H2	−0.2110	0.5218	−0.1269	0.074*
C3	−0.1155 (3)	0.4944 (4)	−0.1620 (2)	0.0651 (10)
H3	−0.1463	0.4302	−0.2034	0.078*
C4	−0.0334 (2)	0.5333 (4)	−0.1474 (2)	0.0610 (10)
H4	−0.0070	0.4963	−0.1788	0.073*
C5	0.0115 (2)	0.6270 (3)	−0.08666 (18)	0.0532 (9)
H5	0.0687	0.6536	−0.0768	0.064*
C6	−0.0261 (2)	0.6823 (3)	−0.04033 (16)	0.0419 (7)
C7	0.0246 (2)	0.7850 (3)	0.02159 (17)	0.0451 (8)
C8	0.0888 (2)	0.9814 (3)	0.15504 (16)	0.0428 (7)
H8	0.1071	0.9942	0.1130	0.051*
C9	0.12177 (18)	1.0627 (3)	0.23016 (16)	0.0391 (7)
C10	0.1779 (2)	1.1670 (3)	0.24127 (18)	0.0495 (8)
H10	0.1959	1.1867	0.1998	0.059*
C11	0.2070 (2)	1.2413 (3)	0.3128 (2)	0.0588 (9)
H11	0.2442	1.3145	0.3210	0.071*
C12	0.1812 (2)	1.2073 (4)	0.3725 (2)	0.0627 (10)
H12	0.2013	1.2560	0.4230	0.075*
C13	0.1256 (2)	1.1012 (3)	0.35803 (18)	0.0527 (9)
H13	0.1089	1.0783	0.4000	0.063*
C14	−0.1556 (2)	0.6713 (3)	0.13930 (19)	0.0472 (8)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Co1	0.0530 (4)	0.0434 (4)	0.0368 (3)	0.000	0.0260 (3)	0.000
S1	0.0679 (7)	0.0601 (6)	0.0712 (6)	−0.0156 (5)	0.0344 (5)	−0.0118 (5)
O1	0.0732 (17)	0.093 (2)	0.0596 (13)	−0.0341 (16)	0.0455 (13)	−0.0249 (14)
N1	0.0644 (18)	0.0570 (18)	0.0456 (13)	−0.0208 (15)	0.0355 (13)	−0.0168 (14)
N2	0.0544 (17)	0.0446 (16)	0.0325 (12)	−0.0039 (14)	0.0225 (12)	−0.0067 (13)
N3	0.0454 (15)	0.0473 (16)	0.0335 (12)	0.0040 (13)	0.0196 (11)	−0.0042 (12)
N4	0.0649 (19)	0.0545 (19)	0.0543 (15)	−0.0096 (17)	0.0336 (15)	−0.0041 (16)
C1	0.055 (2)	0.059 (2)	0.0415 (15)	−0.0055 (19)	0.0240 (15)	−0.0068 (17)
C2	0.057 (2)	0.072 (3)	0.0566 (19)	−0.017 (2)	0.0256 (18)	−0.015 (2)
C3	0.075 (3)	0.063 (3)	0.0542 (19)	−0.008 (2)	0.028 (2)	−0.017 (2)
C4	0.075 (3)	0.063 (2)	0.0526 (19)	0.000 (2)	0.0364 (19)	−0.013 (2)
C5	0.057 (2)	0.064 (2)	0.0481 (17)	−0.0047 (19)	0.0329 (17)	−0.0077 (19)
C6	0.0475 (19)	0.0446 (19)	0.0324 (14)	−0.0012 (17)	0.0173 (14)	−0.0009 (15)
C7	0.053 (2)	0.049 (2)	0.0381 (15)	0.0017 (18)	0.0249 (15)	0.0019 (16)
C8	0.0485 (19)	0.0461 (19)	0.0376 (15)	−0.0008 (17)	0.0231 (14)	−0.0006 (15)
C9	0.0389 (18)	0.0405 (19)	0.0362 (14)	0.0056 (16)	0.0160 (14)	0.0004 (14)
C10	0.053 (2)	0.046 (2)	0.0452 (16)	−0.0013 (18)	0.0194 (16)	0.0016 (17)
C11	0.055 (2)	0.051 (2)	0.0608 (19)	−0.0083 (19)	0.0193 (17)	−0.008 (2)
C12	0.061 (2)	0.063 (3)	0.0556 (19)	−0.006 (2)	0.0192 (18)	−0.027 (2)
C13	0.055 (2)	0.059 (2)	0.0439 (16)	0.0025 (19)	0.0236 (16)	−0.0093 (18)
C14	0.056 (2)	0.044 (2)	0.0516 (18)	−0.0009 (18)	0.0335 (17)	0.0049 (17)

Geometric parameters (Å, º) top

Co1—N4ⁱ	2.054 (3)	C2—H2	0.9500
Co1—N4	2.054 (3)	C3—C4	1.364 (4)
Co1—N3	2.150 (3)	C3—H3	0.9500
Co1—N3ⁱ	2.150 (3)	C4—C5	1.389 (4)
Co1—N2	2.153 (3)	C4—H4	0.9500
Co1—N2ⁱ	2.153 (3)	C5—C6	1.386 (4)
S1—C14	1.624 (4)	C5—H5	0.9500
O1—C7	1.211 (3)	C6—C7	1.486 (4)
N1—N2	1.363 (3)	C8—C9	1.459 (4)
N1—C7	1.369 (3)	C8—H8	0.9500
N1—H1A	0.8801	C9—C10	1.389 (4)
N2—C8	1.289 (4)	C10—C11	1.373 (4)
N3—C13	1.340 (3)	C10—H10	0.9500
N3—C9	1.358 (3)	C11—C12	1.379 (4)
N4—C14	1.182 (4)	C11—H11	0.9500
C1—C2	1.380 (4)	C12—C13	1.389 (4)
C1—C6	1.397 (4)	C12—H12	0.9500
C1—H1	0.9500	C13—H13	0.9500
C2—C3	1.381 (4)

N4ⁱ—Co1—N4	97.62 (16)	C2—C3—H3	120.1
N4ⁱ—Co1—N3	90.99 (11)	C3—C4—C5	120.1 (3)
N4—Co1—N3	164.56 (8)	C3—C4—H4	120.0
N4ⁱ—Co1—N3ⁱ	164.56 (8)	C5—C4—H4	120.0
N4—Co1—N3ⁱ	90.99 (11)	C4—C5—C6	120.7 (3)
N3—Co1—N3ⁱ	83.68 (13)	C4—C5—H5	119.6
N4ⁱ—Co1—N2	95.39 (10)	C6—C5—H5	119.6
N4—Co1—N2	90.98 (10)	C5—C6—C1	118.9 (3)
N3—Co1—N2	75.41 (9)	C5—C6—C7	117.7 (3)
N3ⁱ—Co1—N2	97.25 (9)	C1—C6—C7	123.3 (3)
N4ⁱ—Co1—N2ⁱ	90.98 (10)	O1—C7—N1	121.6 (3)
N4—Co1—N2ⁱ	95.39 (10)	O1—C7—C6	123.4 (2)
N3—Co1—N2ⁱ	97.25 (9)	N1—C7—C6	115.0 (3)
N3ⁱ—Co1—N2ⁱ	75.41 (9)	N2—C8—C9	116.6 (2)
N2—Co1—N2ⁱ	170.33 (14)	N2—C8—H8	121.7
N2—N1—C7	129.1 (2)	C9—C8—H8	121.7
N2—N1—H1A	115.5	N3—C9—C10	122.7 (3)
C7—N1—H1A	115.4	N3—C9—C8	116.0 (3)
C8—N2—N1	122.3 (2)	C10—C9—C8	121.3 (3)
C8—N2—Co1	117.08 (18)	C11—C10—C9	119.4 (3)
N1—N2—Co1	120.63 (18)	C11—C10—H10	120.3
C13—N3—C9	116.9 (3)	C9—C10—H10	120.3
C13—N3—Co1	128.18 (19)	C10—C11—C12	118.5 (3)
C9—N3—Co1	114.80 (18)	C10—C11—H11	120.7
C14—N4—Co1	175.8 (2)	C12—C11—H11	120.7
C2—C1—C6	119.4 (3)	C11—C12—C13	119.4 (3)
C2—C1—H1	120.3	C11—C12—H12	120.3
C6—C1—H1	120.3	C13—C12—H12	120.3
C1—C2—C3	121.2 (3)	N3—C13—C12	123.0 (3)
C1—C2—H2	119.4	N3—C13—H13	118.5
C3—C2—H2	119.4	C12—C13—H13	118.5
C4—C3—C2	119.7 (3)	N4—C14—S1	179.0 (3)
C4—C3—H3	120.1

C7—N1—N2—C8	14.7 (5)	C4—C5—C6—C7	−178.0 (3)
C7—N1—N2—Co1	−164.3 (2)	C2—C1—C6—C5	−0.6 (4)
N4ⁱ—Co1—N2—C8	−90.9 (2)	C2—C1—C6—C7	177.7 (3)
N4—Co1—N2—C8	171.3 (2)	N2—N1—C7—O1	−3.1 (5)
N3—Co1—N2—C8	−1.3 (2)	N2—N1—C7—C6	176.6 (3)
N3ⁱ—Co1—N2—C8	80.2 (2)	C5—C6—C7—O1	18.1 (4)
N4ⁱ—Co1—N2—N1	88.1 (2)	C1—C6—C7—O1	−160.3 (3)
N4—Co1—N2—N1	−9.6 (2)	C5—C6—C7—N1	−161.6 (3)
N3—Co1—N2—N1	177.7 (2)	C1—C6—C7—N1	20.1 (4)
N3ⁱ—Co1—N2—N1	−100.8 (2)	N1—N2—C8—C9	−179.7 (2)
N4ⁱ—Co1—N3—C13	−85.0 (3)	Co1—N2—C8—C9	−0.7 (3)
N4—Co1—N3—C13	150.9 (3)	C13—N3—C9—C10	−1.4 (4)
N3ⁱ—Co1—N3—C13	80.5 (2)	Co1—N3—C9—C10	175.5 (2)
N2—Co1—N3—C13	179.7 (3)	C13—N3—C9—C8	178.4 (3)
N2ⁱ—Co1—N3—C13	6.1 (3)	Co1—N3—C9—C8	−4.6 (3)
N4ⁱ—Co1—N3—C9	98.5 (2)	N2—C8—C9—N3	3.6 (4)
N4—Co1—N3—C9	−25.7 (5)	N2—C8—C9—C10	−176.5 (3)
N3ⁱ—Co1—N3—C9	−96.0 (2)	N3—C9—C10—C11	−0.4 (5)
N2—Co1—N3—C9	3.18 (19)	C8—C9—C10—C11	179.7 (3)
N2ⁱ—Co1—N3—C9	−170.40 (19)	C9—C10—C11—C12	1.7 (5)
C6—C1—C2—C3	0.7 (5)	C10—C11—C12—C13	−1.2 (5)
C1—C2—C3—C4	−0.4 (5)	C9—N3—C13—C12	2.0 (4)
C2—C3—C4—C5	0.1 (5)	Co1—N3—C13—C12	−174.5 (2)
C3—C4—C5—C6	−0.1 (5)	C11—C12—C13—N3	−0.8 (5)
C4—C5—C6—C1	0.3 (5)

Symmetry code: (i) −x, y, −z+1/2.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C13—H13···O1ⁱⁱ	0.95	2.50	3.335 (5)	146

Symmetry code: (ii) x, −y+2, z+1/2.

Experimental details

Crystal data
Chemical formula	[Co(NCS)₂(C₁₃H₁₁N₃O)₂]
M_r	625.59
Crystal system, space group	Monoclinic, C2/c
Temperature (K)	150
a, b, c (Å)	17.112 (10), 10.256 (6), 17.945 (15)
β (°)	117.50 (3)
V (Å³)	2794 (3)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	0.81
Crystal size (mm)	0.19 × 0.18 × 0.10

Data collection
Diffractometer	Bruker SMART APEXII diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996)
T_min, T_max	0.862, 0.924
No. of measured, independent and observed (I > 2σ) reflections	15579, 2742, 1666
R_int	0.119
(sin θ/λ)_max (Å⁻¹)	0.617

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.040, 0.100, 0.97
No. of reflections	2742
No. of parameters	186
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.60, −0.55

Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008), DIAMOND (Brandenburg, 1999).

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C13—H13···O1ⁱ	0.95	2.50	3.335 (5)	146

Symmetry code: (i) x, −y+2, z+1/2.

Acknowledgements

We are grateful to the National Science Council of Taiwan for financial support.

References

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Volume 65| Part 8| August 2009| Page m996

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metal-organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Bis[N′-(2-pyridylmethyl­ene-κN)benzo­hydrazide-κN′]bis­­(thio­cyanato-κN)cobalt(II)

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Experimental

Crystal data

Data collection

Refinement

Supporting information

Acknowledgements

References

metal-organic compounds

Bis[N′-(2-pyridylmethylene-κN)benzohydrazide-κN′]bis(thiocyanato-κN)cobalt(II)