Crystal structure of bis-(4-benzoyl-pyridine-κN)bis-(methanol-κO)bis-(thio-cyanato-κN)cobalt(II).

The crystal structure of the title compound, [Co(NCS)2(C12H9NO)2(CH3OH)2], consists of cobalt(II) cations that are octa-hedrally coordinated by two N-terminal bonding thio-cyanato anions, two methanol mol-ecules and two 4-benzoyl-pyridine ligands into discrete complexes that are located on centres of inversion. These complexes are further linked by O-H⋯O hydrogen bonding between the hy-droxy H atom of the methanol ligand and the carbonyl O atom of the 4-benzoyl-pyridine ligand of a neighboring complex into layers parallel to (101). No pronounced inter-molecular inter-actions are observed between these layers.

Chemical context

The synthesis of magnetic coordination compounds is still a major topic in coordination chemistry. For example, compounds in which the metal cations are linked by small-sized anionic ligands are of special inter­est because cooperative magnetic properties can be expected (Palion-Gazda et al., 2015 ▸; Massoud et al., 2013 ▸). In this context, we and others have reported on a number of one- or two-dimensional thio­cyanate coordination compounds that, dependent on the nature of the metal cation and the neutral co-ligand, show different magnetic properties (Palion-Gazda et al., 2015 ▸; Massoud et al., 2013 ▸; Suckert et al., 2016 ▸; Werner et al., 2015a ▸,b ▸,c ▸,d ▸). In the majority of compounds having a chain structure, the metal cations are linked by pairs of anionic ligands, whereby the co-ligands as well as the N and the S atoms of the thio­cyanate anions are always trans-coordinating. Surprisingly, with 4-benzoyl­pyridine and cobalt thio­cyanate we obtained a compound in which the N-donor co-ligands are still trans to each other, whereas the N and the S atoms of the anionic ligands show a cis-arrangement (Rams et al., 2017 ▸). Like many other Co chain polymers, this compound represent an anti­ferromagnetic phase of single chain magnets with magnetic properties similar to that of related cobalt compounds with an all trans-coordination. Later on, we accidentally obtained a further crystalline phase with 4-benzoyl­pyridine as a co-ligand by reaction in methanol. Here we report on these results.

Structural commentary

The asymmetric unit of the title compound, [Co(NCS)2(C12H9NO)2(CH3OH)2], consists of one cobalt(II) cation that is located on a center of inversion as well as of one thio­cyanate anion, one methanol mol­ecule and one neutral 4-benzoyl­pyridine ligand in general positions. The CoII cation is octa­hedrally coordinated by two terminal N-bonded anionic ligands, the O atoms of two methanol mol­ecules and the N atoms of two 4-benzoyl­pyridine ligands (Fig. 1 ▸). The Co—N bond lengths to the thio­cyanate anions are significantly shorter [2.062 (2) Å] than those to the pyridine N atom of the neutral 4-benzoyl­pyridine ligand [2.1875 (18) Å]. This is expected and in agreement with bond lengths reported in the closely related structure of [Co(NCS)2(C12H9NO)2(CH3CN)2] (Suckert et al., 2017 ▸) where methanol is replaced by aceto­nitrile, and also for related compounds reported in the literature (Soliman et al., 2014 ▸). The 4-benzoyl­pyridine ligand is not planar, with the phenyl rings inclined by 61.34 (9)°. This value is in agreement with those retrieved from literature which vary between 40.4 and 74.8° (Escuer et al., 2004 ▸).

Figure 1

View of one discrete complex with labelling and displacement ellipsoids drawn at the 50% probability level. [Symmetry code: (i) −x + 1, −y, −z + 1.]

Supra­molecular features

In the crystal structure of the title compound, the discrete complexes are linked by inter­molecular O—H⋯O hydrogen bonds between the hydroxyl H atom of the methanol mol­ecule and the carbonyl oxygen atom of a 4-benzoyl­pyridine ligand of a neighboring complex. Each of the complexes is linked to four symmetry-related complexes into layers parallel to (101) (Fig. 2 ▸ and Table 1 ▸). Between these layers no pronounced inter­molecular inter­actions are observed (Fig. 3 ▸).

Figure 2

Crystal structure of the title compound in a view onto the O—H⋯O hydrogen-bonded layers (shown as dashed lines).

Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1O1⋯O11i	0.84	1.92	2.752 (3)	173

Symmetry code: (i) .

Figure 3

Crystal structure of the title compound in a view perpendicular to the hydrogen-bonded layers along the crystallographic b axis. Inter­molecular O—H⋯O hydrogen bonds are shown as dashed lines.

Database survey

Altogether, there are 22 coordination compounds with 4-benzoyl­pyridine ligands compiled in the Cambridge Structure Database (Version 5.38, last update 2016, Groom et al., 2016 ▸) of which three contain also thio­cyanate anions. In two of these structures Co(II) or Ni(II) cations are octa­hedrally coordinated by the N atoms of four 4-benzoyl­pyridine ligands and the N atoms of two thio­cyanate anions (Drew et al., 1985 ▸; Soliman et al., 2014 ▸). In the third compound, Cu(II) cations have a square-planar coordination sphere defined by two 4-benzoyl­pyridine ligands and two thio­cyanate anions (Bai et al., 2011 ▸). Finally, we have reported on a compound with a one-dimensional structure, in which the Co(II) cations are linked by μ-1,3-bridging thio­cyanate anions (Rams et al., 2017 ▸), as well as a compound very similar to the title structure in which CoII cations are coordinated into discrete complexes by two thio­cyanate anions, two 4-benzoyl­pyridine ligands and two aceto­nitrile mol­ecules (Suckert et al., 2017 ▸).

Synthesis and crystallization

Co(NCS)2 and 4-benzoyl­pyridine were purchased from Alfa Aesar. Crystals of the title compound suitable for single crystal X-ray diffraction were obtained by reaction of 26.3 mg Co(NCS)2 (0.15 mmol) with 27.5 mg 4-benzoyl­pyridine (0.15 mmol) in methanol (1.5 ml) after a few days.

Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2 ▸. The C-bound hydrogen atoms were positioned with idealized geometry and were refined with fixed isotropic displacement parameters U iso(H) = 1.2 U eq(C) for aromatic and U iso(H) = 1.5 U eq(C) for methyl H atoms using a riding model. The methyl hydrogen atoms were allowed to rotate but not to tip. The O—H hydrogen atom was located in a difference map. Its bond length was set to the ideal value of 0.84 Å and finally, it was refined with U iso(H) = 1.5 U eq(O) using a riding model.

Table 2

Experimental details

Crystal data
Chemical formula	[Co(NCS)2(C12H9NO)2(CH4O)2]
M r	605.58
Crystal system, space group	Monoclinic, P21/n
Temperature (K)	200
a, b, c (Å)	12.0367 (10), 7.2497 (4), 16.1396 (13)
β (°)	94.404 (10)
V (Å3)	1404.22 (18)
Z	2
Radiation type	Mo Kα
μ (mm−1)	0.80
Crystal size (mm)	0.26 × 0.20 × 0.09
Data collection
Diffractometer	Stoe IPDS1
Absorption correction	Numerical (X-SHAPE and X-RED32; Stoe, 2008 ▸)
T min, T max	0.597, 0.901
No. of measured, independent and observed [I > 2σ(I)] reflections	13065, 3054, 2571
R int	0.094
(sin θ/λ)max (Å−1)	0.639
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.052, 0.149, 1.08
No. of reflections	3054
No. of parameters	179
H-atom treatment	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.98, −0.94

Computer programs: X-AREA (Stoe, 2008 ▸), XP in SHELXTL and SHELXS97 (Sheldrick, 2008 ▸), SHELXL2014/7 (Sheldrick, 2015 ▸) and DIAMOND (Brandenburg, 1999 ▸), publCIF (Westrip, 2010 ▸).

Crystal structure: contains datablock(s) I. DOI: 10.1107/S2056989017004765/wm5377sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989017004765/wm5377Isup2.hkl

CCDC reference: 1540326

Additional supporting information: crystallographic information; 3D view; checkCIF report

[Co(NCS)2(C12H9NO)2(CH4O)2]	F(000) = 626
Mr = 605.58	Dx = 1.432 Mg m−3
Monoclinic, P21/n	Mo Kα radiation, λ = 0.71073 Å
a = 12.0367 (10) Å	Cell parameters from 13065 reflections
b = 7.2497 (4) Å	θ = 2.5–27.0°
c = 16.1396 (13) Å	µ = 0.80 mm−1
β = 94.404 (10)°	T = 200 K
V = 1404.22 (18) Å3	Block, blue
Z = 2	0.26 × 0.20 × 0.09 mm

Stoe IPDS-1 diffractometer	2571 reflections with I > 2σ(I)
phi scans	Rint = 0.094
Absorption correction: numerical (X-SHAPE and X-RED32; Stoe, 2008)	θmax = 27.0°, θmin = 2.5°
Tmin = 0.597, Tmax = 0.901	h = −15→15
13065 measured reflections	k = −9→9
3054 independent reflections	l = −20→20

Refinement on F2	Hydrogen site location: mixed
Least-squares matrix: full	H-atom parameters constrained
R[F2 > 2σ(F2)] = 0.052	w = 1/[σ2(Fo2) + (0.1003P)2 + 0.142P] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.149	(Δ/σ)max < 0.001
S = 1.08	Δρmax = 0.98 e Å−3
3054 reflections	Δρmin = −0.94 e Å−3
179 parameters	Extinction correction: SHELXL-2014/7 (Sheldrick 2015, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
0 restraints	Extinction coefficient: 0.026 (4)

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

	x	y	z	Uiso*/Ueq
Co1	0.5000	0.0000	0.5000	0.02401 (19)
N1	0.38448 (17)	0.1893 (3)	0.45202 (14)	0.0369 (5)
C1	0.30488 (19)	0.2635 (3)	0.42427 (14)	0.0290 (5)
S1	0.19267 (6)	0.36720 (11)	0.38595 (5)	0.0433 (2)
N11	0.63301 (15)	0.1453 (3)	0.44184 (12)	0.0262 (4)
C11	0.71706 (18)	0.0512 (4)	0.41204 (15)	0.0276 (5)
H11	0.7229	−0.0773	0.4232	0.033*
C12	0.79607 (18)	0.1334 (3)	0.36556 (14)	0.0281 (5)
H12	0.8528	0.0614	0.3435	0.034*
C13	0.79087 (18)	0.3217 (3)	0.35185 (14)	0.0269 (5)
C14	0.70540 (19)	0.4217 (4)	0.38427 (16)	0.0309 (5)
H14	0.7002	0.5514	0.3767	0.037*
C15	0.62774 (19)	0.3276 (3)	0.42802 (15)	0.0309 (5)
H15	0.5685	0.3954	0.4490	0.037*
C16	0.87501 (18)	0.4060 (3)	0.29893 (14)	0.0281 (5)
C17	0.93531 (18)	0.5746 (4)	0.32667 (15)	0.0283 (5)
C18	0.9973 (2)	0.6709 (4)	0.27036 (17)	0.0350 (6)
H18	0.9958	0.6320	0.2141	0.042*
C19	1.0602 (2)	0.8220 (4)	0.2966 (2)	0.0425 (6)
H19	1.1008	0.8884	0.2582	0.051*
C20	1.0640 (2)	0.8770 (4)	0.3792 (2)	0.0444 (7)
H20	1.1081	0.9802	0.3973	0.053*
C21	1.0038 (2)	0.7819 (4)	0.43553 (19)	0.0397 (6)
H21	1.0072	0.8196	0.4920	0.048*
C22	0.93860 (19)	0.6321 (4)	0.40941 (15)	0.0311 (5)
H22	0.8962	0.5687	0.4477	0.037*
O11	0.89175 (16)	0.3254 (3)	0.23427 (11)	0.0384 (4)
C23	0.6398 (3)	0.2012 (6)	0.6476 (2)	0.0553 (9)
H23A	0.6339	0.2842	0.6950	0.083*
H23B	0.6714	0.0831	0.6673	0.083*
H23C	0.6882	0.2568	0.6084	0.083*
O1	0.53106 (15)	0.1711 (3)	0.60682 (11)	0.0375 (4)
H1O1	0.4842	0.1720	0.6428	0.056*

	U11	U22	U33	U12	U13	U23
Co1	0.0156 (3)	0.0275 (3)	0.0295 (3)	0.00038 (14)	0.00505 (17)	0.00275 (15)
N1	0.0249 (10)	0.0380 (12)	0.0483 (12)	0.0054 (9)	0.0049 (9)	0.0121 (9)
C1	0.0262 (11)	0.0274 (12)	0.0337 (11)	−0.0023 (9)	0.0045 (9)	0.0050 (9)
S1	0.0303 (4)	0.0428 (4)	0.0555 (4)	0.0090 (3)	−0.0038 (3)	0.0089 (3)
N11	0.0190 (8)	0.0278 (10)	0.0324 (9)	−0.0027 (7)	0.0068 (7)	0.0027 (7)
C11	0.0207 (10)	0.0283 (12)	0.0350 (11)	−0.0007 (9)	0.0095 (9)	0.0030 (9)
C12	0.0206 (10)	0.0307 (12)	0.0339 (11)	0.0006 (9)	0.0079 (9)	0.0020 (9)
C13	0.0216 (10)	0.0301 (12)	0.0291 (10)	−0.0025 (9)	0.0038 (8)	0.0002 (8)
C14	0.0253 (11)	0.0259 (12)	0.0421 (13)	−0.0007 (9)	0.0077 (10)	0.0021 (9)
C15	0.0229 (10)	0.0291 (12)	0.0418 (13)	−0.0006 (9)	0.0100 (9)	−0.0024 (9)
C16	0.0193 (10)	0.0342 (13)	0.0311 (11)	−0.0006 (9)	0.0039 (8)	0.0043 (9)
C17	0.0181 (10)	0.0301 (13)	0.0368 (12)	−0.0003 (9)	0.0019 (9)	0.0060 (9)
C18	0.0258 (11)	0.0365 (14)	0.0432 (13)	−0.0037 (10)	0.0060 (10)	0.0087 (10)
C19	0.0287 (12)	0.0343 (15)	0.0655 (18)	−0.0051 (11)	0.0093 (12)	0.0109 (12)
C20	0.0266 (12)	0.0288 (14)	0.077 (2)	−0.0044 (10)	0.0012 (13)	−0.0053 (12)
C21	0.0304 (12)	0.0338 (14)	0.0545 (16)	0.0007 (10)	0.0008 (11)	−0.0081 (11)
C22	0.0224 (10)	0.0323 (13)	0.0385 (12)	0.0003 (9)	0.0023 (9)	0.0014 (9)
O11	0.0376 (10)	0.0444 (11)	0.0348 (9)	−0.0099 (8)	0.0130 (8)	−0.0012 (7)
C23	0.0412 (16)	0.079 (2)	0.0455 (16)	−0.0228 (16)	0.0037 (13)	−0.0180 (15)
O1	0.0316 (9)	0.0504 (12)	0.0313 (9)	−0.0073 (8)	0.0081 (7)	−0.0076 (7)

Co1—N1	2.062 (2)	C16—O11	1.226 (3)
Co1—N1i	2.062 (2)	C16—C17	1.474 (3)
Co1—O1	2.1336 (18)	C17—C22	1.397 (3)
Co1—O1i	2.1336 (18)	C17—C18	1.405 (3)
Co1—N11	2.1875 (18)	C18—C19	1.379 (4)
Co1—N11i	2.1875 (18)	C18—H18	0.9500
N1—C1	1.159 (3)	C19—C20	1.389 (5)
C1—S1	1.626 (2)	C19—H19	0.9500
N11—C11	1.340 (3)	C20—C21	1.388 (4)
N11—C15	1.341 (3)	C20—H20	0.9500
C11—C12	1.390 (3)	C21—C22	1.386 (4)
C11—H11	0.9500	C21—H21	0.9500
C12—C13	1.383 (3)	C22—H22	0.9500
C12—H12	0.9500	C23—O1	1.435 (3)
C13—C14	1.393 (3)	C23—H23A	0.9800
C13—C16	1.504 (3)	C23—H23B	0.9800
C14—C15	1.393 (3)	C23—H23C	0.9800
C14—H14	0.9500	O1—H1O1	0.8400
C15—H15	0.9500
N1—Co1—N1i	180.00 (10)	N11—C15—H15	118.6
N1—Co1—O1	89.30 (9)	C14—C15—H15	118.6
N1i—Co1—O1	90.70 (9)	O11—C16—C17	123.0 (2)
N1—Co1—O1i	90.70 (9)	O11—C16—C13	116.8 (2)
N1i—Co1—O1i	89.30 (9)	C17—C16—C13	120.1 (2)
O1—Co1—O1i	180.0	C22—C17—C18	119.5 (2)
N1—Co1—N11	90.75 (8)	C22—C17—C16	121.0 (2)
N1i—Co1—N11	89.25 (8)	C18—C17—C16	119.3 (2)
O1—Co1—N11	88.74 (7)	C19—C18—C17	120.1 (3)
O1i—Co1—N11	91.26 (7)	C19—C18—H18	119.9
N1—Co1—N11i	89.25 (8)	C17—C18—H18	119.9
N1i—Co1—N11i	90.75 (8)	C18—C19—C20	120.0 (3)
O1—Co1—N11i	91.26 (7)	C18—C19—H19	120.0
O1i—Co1—N11i	88.74 (7)	C20—C19—H19	120.0
N11—Co1—N11i	180.0	C21—C20—C19	120.4 (3)
C1—N1—Co1	165.5 (2)	C21—C20—H20	119.8
N1—C1—S1	179.5 (2)	C19—C20—H20	119.8
C11—N11—C15	118.02 (19)	C22—C21—C20	120.1 (3)
C11—N11—Co1	120.42 (16)	C22—C21—H21	120.0
C15—N11—Co1	121.28 (15)	C20—C21—H21	120.0
N11—C11—C12	122.8 (2)	C21—C22—C17	119.9 (2)
N11—C11—H11	118.6	C21—C22—H22	120.0
C12—C11—H11	118.6	C17—C22—H22	120.0
C13—C12—C11	119.0 (2)	O1—C23—H23A	109.5
C13—C12—H12	120.5	O1—C23—H23B	109.5
C11—C12—H12	120.5	H23A—C23—H23B	109.5
C12—C13—C14	118.6 (2)	O1—C23—H23C	109.5
C12—C13—C16	117.9 (2)	H23A—C23—H23C	109.5
C14—C13—C16	123.4 (2)	H23B—C23—H23C	109.5
C15—C14—C13	118.6 (2)	C23—O1—Co1	123.76 (18)
C15—C14—H14	120.7	C23—O1—H1O1	108.6
C13—C14—H14	120.7	Co1—O1—H1O1	118.5
N11—C15—C14	122.8 (2)

D—H···A	D—H	H···A	D···A	D—H···A
O1—H1O1···O11ii	0.84	1.92	2.752 (3)	173