metal-organic compounds
Pentaaqua(dimethylformamide)cobalt(II) sulfate dimethylformamide monosolvate
aGiresun University, Department of Chemistry, Art and Sciences Faculty, Giresun, Turkey
*Correspondence e-mail: murat.tas@giresun.edu.tr
The title compound, [Co(C3H7NO)(H2O)5]SO4·C3H7NO, contains five aqua ligands, a CoII atom, a sulfate ion and both a coordinating and a non-coordinating dimethylformamide (DMF) molecule. The DMF solvent molecule lies between the complex units, which are located along the b axis. The sulfate ion is for charge balance. The CoII atom has distorted octahedral coordination geometry, being ligated by five aqua ligands and the O atom of the DMF ligand. O—H⋯O hydrogen bonds between the aqua ligands and the sulfate anion and non-coordinating DMF molecule lead to the formation of a three-dimensional network. Since all constituents lie on a mirror plane, the H atoms of all methyl groups and of one of the aqua ligands are equally disordered over two positions.
Related literature
For background to the use of DMF, see: Kolthoff et al. (1970); Pastoriza-Santos & Liz-Marzan (1999); Kimmerle & Eben (1975); Gescher (1993); Zhou et al. (1996); Matwiyoff (1966). For amide complexes, see: Rao et al. (1984); Angus et al. (1993); Khum & Maclntyre (1965).
Experimental
Crystal data
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Data collection: CrysAlis PRO (Agilent, 2011); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2.
Supporting information
https://doi.org/10.1107/S1600536813012841/bq2385sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813012841/bq2385Isup2.hkl
The CoSO4.6H2O and 5-hydantoin acetic acid was mixed in 50 ml DMF solvent. The pH of the solution was adjusted to 6.7 by 1% NaHCO3 solution. The mixture was heated to 50°C and stirred for 1 h and then slowly cooled to room temperature. The solution was kept for several weeks, so suitable crystals for X-ray analyses was obtained.
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 > 2σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for 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.
N,N-Dimethylformamide (DMF) which is a simple model molecule for the peptide bond in proteins and readily absorbed into the human organism by inhalitaion or dermal contamination and is suspected of being a carcinogen, is an important compound used as a solvent in a variety of industrial processes including the preparation of synthetic fibers, leathers, films, and surface coatings, preparation of colloids (Kolthoff et al., 1970; Pastoriza-Santos & Liz-Marzan, 1999; Kimmerle & Eben, 1975; Gescher, 1993; Zhou et al., 1996). Also DMF shows similar solvent properties to those of water and methanol and shows promise as a nonaqueous medium for ionic reactions (Matwiyoff, 1966).
Due to the model properties for
the amide complexes is of continuing interest. Crystallographic studies have shown that in complexes, the are bonded to the metal atom by using their carbonyl oxygen (Rao et al., 1984; Angus et al., 1993; Khum & Maclntyre, 1965).The
of the titled compound contains two different DMF molecules. One of them is acted as ligand and bonds to the Co(II) ions via its oxygen atom and the other one is involved as solvate molecules in the The structure also has sulfate ion to charge balance.The Co(II) atom has distorted octahedral geometry, being ligated by five aqua ligands and a DMF ligand (Table 1). The coordination bond lengths were found 2.046 (7) Å for Co—ODMF and in the rage of 2.062–2.110 Å for Co—Oaqua. The O—H···O intermolecular hydrogen bonds formed three dimensional molecular network, in solid state. The sulphate ions plays major role to form the three-dimensional structure via formation of the hydrogen bonds. The DMF solvate units were capsulated between the complex units which locate along the b-axis, by the hydrogen bond interactions (Table 2).
For background to the use of DMF, see: Kolthoff et al. (1970); Pastoriza-Santos & Liz-Marzan (1999); Kimmerle & Eben (1975); Gescher (1993); Zhou et al. (1996); Matwiyoff (1966). For amide complexes, see: Rao et al. (1984); Angus et al. (1993); Khum & Maclntyre (1965).
Data collection: CrysAlis PRO (Agilent, 2011); cell
CrysAlis PRO (Agilent, 2011); data reduction: CrysAlis PRO (Agilent, 2011); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2 (Dolomanov et al., 2009).Fig. 1. A view of the structure of the title complex, showing the atom labelling. i: x, 1/2-y, z | |
Fig. 2. A view of the packing diagram of the titled compound. |
[Co(C3H7NO)(H2O)5]SO4·C3H7NO | Dx = 1.578 Mg m−3 |
Mr = 391.26 | Mo Kα radiation, λ = 0.7107 Å |
Orthorhombic, Pnma | Cell parameters from 108 reflections |
a = 22.256 (8) Å | θ = 4.4–25.9° |
b = 7.449 (7) Å | µ = 1.22 mm−1 |
c = 9.929 (9) Å | T = 298 K |
V = 1646 (2) Å3 | Block, clear red |
Z = 4 | 0.28 × 0.20 × 0.19 mm |
F(000) = 820 |
Agilent SuperNova (Single source at offset, Eos) diffractometer | 1627 independent reflections |
Radiation source: SuperNova (Mo) X-ray Source | 1407 reflections with I > 2σ(I) |
Mirror monochromator | Rint = 0.021 |
Detector resolution: 16.0454 pixels mm-1 | θmax = 25.6°, θmin = 3.3° |
ω scans | h = −27→24 |
Absorption correction: multi-scan (SCALE3 in ABSPACK; Agilent, 2011) | k = −5→8 |
Tmin = 0.956, Tmax = 1.000 | l = −11→7 |
3903 measured reflections |
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)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.100 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.14 | w = 1/[σ2(Fo2) + (0.0358P)2 + 1.4684P] where P = (Fo2 + 2Fc2)/3 |
1627 reflections | (Δ/σ)max < 0.001 |
139 parameters | Δρmax = 0.65 e Å−3 |
3 restraints | Δρmin = −0.38 e Å−3 |
[Co(C3H7NO)(H2O)5]SO4·C3H7NO | V = 1646 (2) Å3 |
Mr = 391.26 | Z = 4 |
Orthorhombic, Pnma | Mo Kα radiation |
a = 22.256 (8) Å | µ = 1.22 mm−1 |
b = 7.449 (7) Å | T = 298 K |
c = 9.929 (9) Å | 0.28 × 0.20 × 0.19 mm |
Agilent SuperNova (Single source at offset, Eos) diffractometer | 1627 independent reflections |
Absorption correction: multi-scan (SCALE3 in ABSPACK; Agilent, 2011) | 1407 reflections with I > 2σ(I) |
Tmin = 0.956, Tmax = 1.000 | Rint = 0.021 |
3903 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 3 restraints |
wR(F2) = 0.100 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.14 | Δρmax = 0.65 e Å−3 |
1627 reflections | Δρmin = −0.38 e Å−3 |
139 parameters |
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. |
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 > 2sigma(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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
Co1 | 0.14060 (2) | 0.2500 | 0.38601 (6) | 0.0369 (2) | |
O1 | 0.18765 (17) | 0.2500 | 0.2071 (4) | 0.0595 (10) | |
H1A | 0.1918 | 0.3576 | 0.1787 | 0.089* | 0.50 |
H1B | 0.1684 | 0.1889 | 0.1484 | 0.089* | 0.50 |
O2 | 0.19603 (11) | 0.0408 (3) | 0.4542 (3) | 0.0480 (6) | |
O4 | 0.09678 (16) | 0.2500 | 0.5671 (4) | 0.0554 (9) | |
O3 | 0.08065 (10) | 0.0530 (3) | 0.3135 (3) | 0.0491 (6) | |
N1 | 0.09188 (18) | 0.2500 | 0.7912 (4) | 0.0507 (11) | |
C1 | 0.1212 (3) | 0.2500 | 0.6752 (6) | 0.0581 (14) | |
H1 | 0.1630 | 0.2500 | 0.6774 | 0.070* | |
C3 | 0.1242 (3) | 0.2500 | 0.9139 (6) | 0.090 (2) | |
H3C | 0.1223 | 0.1329 | 0.9538 | 0.135* | 0.50 |
H3D | 0.1069 | 0.3363 | 0.9743 | 0.135* | 0.50 |
H3E | 0.1654 | 0.2809 | 0.8968 | 0.135* | 0.50 |
C2 | 0.0295 (2) | 0.2500 | 0.7952 (6) | 0.0671 (16) | |
H2C | 0.0154 | 0.1316 | 0.8164 | 0.101* | 0.50 |
H2D | 0.0140 | 0.2859 | 0.7091 | 0.101* | 0.50 |
H2E | 0.0160 | 0.3325 | 0.8630 | 0.101* | 0.50 |
S1 | 0.31484 (5) | 0.2500 | 0.66245 (12) | 0.0364 (3) | |
O8 | 0.37947 (14) | 0.2500 | 0.6875 (4) | 0.0512 (9) | |
O7 | 0.28365 (16) | 0.2500 | 0.7907 (4) | 0.0557 (9) | |
N2 | 0.40622 (18) | 0.2500 | 0.2342 (4) | 0.0489 (10) | |
O5 | 0.49626 (15) | 0.2500 | 0.3358 (4) | 0.0607 (10) | |
C6 | 0.4297 (3) | 0.2500 | 0.0993 (5) | 0.0689 (17) | |
H6A | 0.4029 | 0.1851 | 0.0413 | 0.103* | 0.50 |
H6B | 0.4685 | 0.1936 | 0.0987 | 0.103* | 0.50 |
H6C | 0.4334 | 0.3713 | 0.0680 | 0.103* | 0.50 |
C4 | 0.4415 (2) | 0.2500 | 0.3370 (6) | 0.0546 (13) | |
H4 | 0.4232 | 0.2500 | 0.4212 | 0.066* | |
C5 | 0.3412 (2) | 0.2500 | 0.2504 (7) | 0.0722 (18) | |
H5A | 0.3313 | 0.2272 | 0.3430 | 0.108* | 0.50 |
H5B | 0.3239 | 0.1581 | 0.1948 | 0.108* | 0.50 |
H5C | 0.3254 | 0.3647 | 0.2243 | 0.108* | 0.50 |
O6 | 0.29865 (11) | 0.4135 (3) | 0.5871 (2) | 0.0539 (7) | |
H3A | 0.0516 (12) | 0.090 (5) | 0.266 (3) | 0.067 (13)* | |
H3B | 0.0944 (16) | −0.044 (4) | 0.274 (4) | 0.067 (13)* | |
H2A | 0.2308 (11) | 0.065 (6) | 0.492 (4) | 0.082 (15)* | |
H2B | 0.2032 (17) | −0.055 (6) | 0.404 (4) | 0.071 (14)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Co1 | 0.0354 (3) | 0.0320 (4) | 0.0434 (4) | 0.000 | −0.0010 (3) | 0.000 |
O1 | 0.086 (3) | 0.041 (2) | 0.052 (2) | 0.000 | 0.0169 (19) | 0.000 |
O2 | 0.0492 (14) | 0.0394 (14) | 0.0553 (15) | 0.0061 (12) | −0.0120 (12) | −0.0035 (13) |
O4 | 0.063 (2) | 0.059 (2) | 0.044 (2) | 0.000 | 0.0044 (17) | 0.000 |
O3 | 0.0401 (13) | 0.0398 (14) | 0.0672 (17) | −0.0011 (11) | −0.0094 (12) | −0.0070 (13) |
N1 | 0.051 (2) | 0.057 (3) | 0.044 (2) | 0.000 | 0.0028 (19) | 0.000 |
C1 | 0.054 (3) | 0.052 (3) | 0.068 (4) | 0.000 | 0.011 (3) | 0.000 |
C3 | 0.076 (4) | 0.134 (7) | 0.060 (4) | 0.000 | −0.007 (3) | 0.000 |
C2 | 0.060 (3) | 0.073 (4) | 0.068 (4) | 0.000 | −0.003 (3) | 0.000 |
S1 | 0.0398 (6) | 0.0284 (6) | 0.0410 (6) | 0.000 | −0.0073 (5) | 0.000 |
O8 | 0.0391 (17) | 0.046 (2) | 0.069 (2) | 0.000 | −0.0041 (16) | 0.000 |
O7 | 0.066 (2) | 0.041 (2) | 0.060 (2) | 0.000 | 0.0174 (18) | 0.000 |
N2 | 0.048 (2) | 0.053 (3) | 0.046 (2) | 0.000 | 0.0012 (19) | 0.000 |
O5 | 0.045 (2) | 0.077 (3) | 0.061 (2) | 0.000 | 0.0062 (17) | 0.000 |
C6 | 0.077 (4) | 0.084 (4) | 0.045 (3) | 0.000 | 0.006 (3) | 0.000 |
C4 | 0.051 (3) | 0.061 (4) | 0.052 (3) | 0.000 | 0.010 (2) | 0.000 |
C5 | 0.047 (3) | 0.091 (5) | 0.078 (4) | 0.000 | −0.003 (3) | 0.000 |
O6 | 0.0689 (15) | 0.0350 (13) | 0.0578 (15) | −0.0014 (12) | −0.0243 (12) | 0.0065 (12) |
Co1—O1 | 2.062 (4) | C3—H3E | 0.9600 |
Co1—O2i | 2.101 (10) | C2—H2C | 0.9600 |
Co1—O2 | 2.101 (10) | C2—H2D | 0.9600 |
Co1—O4 | 2.046 (4) | C2—H2E | 0.9600 |
Co1—O3 | 2.110 (9) | S1—O8 | 1.460 (3) |
Co1—O3i | 2.110 (9) | S1—O7 | 1.450 (4) |
O1—H1A | 0.8552 | S1—O6 | 1.474 (3) |
O1—H1B | 0.8552 | S1—O6i | 1.474 (3) |
O2—H2A | 0.878 (19) | N2—C6 | 1.437 (6) |
O2—H2B | 0.89 (4) | N2—C4 | 1.288 (7) |
O4—C1 | 1.203 (7) | N2—C5 | 1.457 (6) |
O3—H3A | 0.850 (18) | O5—C4 | 1.219 (6) |
O3—H3B | 0.879 (19) | C6—H6A | 0.9600 |
N1—C1 | 1.324 (7) | C6—H6B | 0.9600 |
N1—C3 | 1.414 (7) | C6—H6C | 0.9600 |
N1—C2 | 1.389 (6) | C4—H4 | 0.9300 |
C1—H1 | 0.9300 | C5—H5A | 0.9600 |
C3—H3C | 0.9600 | C5—H5B | 0.9600 |
C3—H3D | 0.9600 | C5—H5C | 0.9600 |
O1—Co1—O2 | 88.81 (11) | O4—C1—N1 | 123.6 (5) |
O1—Co1—O2i | 88.81 (11) | O4—C1—H1 | 118.2 |
O1—Co1—O3i | 91.57 (12) | N1—C1—H1 | 118.2 |
O1—Co1—O3 | 91.57 (12) | N1—C3—H3C | 109.5 |
O2—Co1—O2i | 95.9 (5) | N1—C3—H3D | 109.5 |
O2i—Co1—O3 | 176.13 (10) | N1—C3—H3E | 109.5 |
O2i—Co1—O3i | 88.0 (5) | N1—C2—H2C | 109.5 |
O2—Co1—O3 | 88.0 (5) | N1—C2—H2D | 109.5 |
O2—Co1—O3i | 176.13 (10) | N1—C2—H2E | 109.5 |
O4—Co1—O1 | 177.94 (15) | O8—S1—O6 | 109.10 (17) |
O4—Co1—O2 | 89.81 (11) | O8—S1—O6i | 109.10 (17) |
O4—Co1—O2i | 89.81 (11) | O7—S1—O8 | 108.8 (2) |
O4—Co1—O3 | 89.90 (11) | O7—S1—O6 | 109.19 (18) |
O4—Co1—O3i | 89.91 (11) | O7—S1—O6i | 109.19 (18) |
O3i—Co1—O3 | 88.2 (5) | O6i—S1—O6 | 111.4 (5) |
Co1—O1—H1A | 109.8 | C6—N2—C5 | 117.7 (5) |
Co1—O1—H1B | 109.5 | C4—N2—C6 | 121.1 (5) |
H1A—O1—H1B | 109.1 | C4—N2—C5 | 121.2 (5) |
Co1—O2—H2A | 120 (3) | N2—C6—H6A | 109.5 |
Co1—O2—H2B | 122 (3) | N2—C6—H6B | 109.5 |
H2A—O2—H2B | 104 (4) | N2—C6—H6C | 109.5 |
C1—O4—Co1 | 124.7 (4) | N2—C4—H4 | 116.5 |
Co1—O3—H3A | 116 (3) | O5—C4—N2 | 127.0 (5) |
Co1—O3—H3B | 120 (2) | O5—C4—H4 | 116.5 |
H3A—O3—H3B | 106 (4) | N2—C5—H5A | 109.5 |
C1—N1—C3 | 119.9 (5) | N2—C5—H5B | 109.5 |
C1—N1—C2 | 121.2 (5) | N2—C5—H5C | 109.5 |
C2—N1—C3 | 119.0 (5) | ||
Co1—O4—C1—N1 | 180.0 | C3—N1—C1—O4 | 180.0 |
O2i—Co1—O4—C1 | −47.92 (7) | C2—N1—C1—O4 | 0.000 (1) |
O2—Co1—O4—C1 | 47.92 (7) | C6—N2—C4—O5 | 0.0 |
O3—Co1—O4—C1 | 135.93 (6) | C5—N2—C4—O5 | 180.0 |
O3i—Co1—O4—C1 | −135.93 (6) |
Symmetry code: (i) x, −y+1/2, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···O6ii | 0.86 | 1.95 | 2.792 (4) | 171 |
O1—H1B···O6iii | 0.86 | 2.26 | 2.792 (4) | 120 |
C2—H2D···O4 | 0.96 | 2.34 | 2.715 (7) | 103 |
O3—H3A···O5iv | 0.85 (2) | 1.99 (2) | 2.807 (8) | 162 (4) |
O3—H3B···O8v | 0.88 (2) | 1.85 (2) | 2.731 (17) | 178 (4) |
O2—H2A···O6i | 0.88 (2) | 1.79 (2) | 2.660 (3) | 171 (4) |
O2—H2B···O7v | 0.89 (4) | 1.86 (4) | 2.745 (15) | 177 (4) |
Symmetry codes: (i) x, −y+1/2, z; (ii) −x+1/2, −y+1, z−1/2; (iii) −x+1/2, y−1/2, z−1/2; (iv) x−1/2, −y+1/2, −z+1/2; (v) −x+1/2, −y, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Co(C3H7NO)(H2O)5]SO4·C3H7NO |
Mr | 391.26 |
Crystal system, space group | Orthorhombic, Pnma |
Temperature (K) | 298 |
a, b, c (Å) | 22.256 (8), 7.449 (7), 9.929 (9) |
V (Å3) | 1646 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.22 |
Crystal size (mm) | 0.28 × 0.20 × 0.19 |
Data collection | |
Diffractometer | Agilent SuperNova (Single source at offset, Eos) |
Absorption correction | Multi-scan (SCALE3 in ABSPACK; Agilent, 2011) |
Tmin, Tmax | 0.956, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3903, 1627, 1407 |
Rint | 0.021 |
(sin θ/λ)max (Å−1) | 0.607 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.100, 1.14 |
No. of reflections | 1627 |
No. of parameters | 139 |
No. of restraints | 3 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.65, −0.38 |
Computer programs: CrysAlis PRO (Agilent, 2011), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), OLEX2 (Dolomanov et al., 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1A···O6i | 0.86 | 1.95 | 2.792 (4) | 171.4 |
O1—H1B···O6ii | 0.86 | 2.26 | 2.792 (4) | 120.3 |
O3—H3A···O5iii | 0.850 (18) | 1.99 (2) | 2.807 (8) | 162 (4) |
O3—H3B···O8iv | 0.879 (19) | 1.85 (2) | 2.731 (17) | 178 (4) |
O2—H2A···O6v | 0.878 (19) | 1.79 (2) | 2.660 (3) | 171 (4) |
O2—H2B···O7iv | 0.89 (4) | 1.86 (4) | 2.745 (15) | 177 (4) |
Symmetry codes: (i) −x+1/2, −y+1, z−1/2; (ii) −x+1/2, y−1/2, z−1/2; (iii) x−1/2, −y+1/2, −z+1/2; (iv) −x+1/2, −y, z−1/2; (v) x, −y+1/2, z. |
References
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N,N-Dimethylformamide (DMF) which is a simple model molecule for the peptide bond in proteins and readily absorbed into the human organism by inhalitaion or dermal contamination and is suspected of being a carcinogen, is an important compound used as a solvent in a variety of industrial processes including the preparation of synthetic fibers, leathers, films, and surface coatings, preparation of colloids (Kolthoff et al., 1970; Pastoriza-Santos & Liz-Marzan, 1999; Kimmerle & Eben, 1975; Gescher, 1993; Zhou et al., 1996). Also DMF shows similar solvent properties to those of water and methanol and shows promise as a nonaqueous medium for ionic reactions (Matwiyoff, 1966).
Due to the model properties for peptides, the amide complexes is of continuing interest. Crystallographic studies have shown that in complexes, the amides are bonded to the metal atom by using their carbonyl oxygen (Rao et al., 1984; Angus et al., 1993; Khum & Maclntyre, 1965).
The asymmetric unit of the titled compound contains two different DMF molecules. One of them is acted as ligand and bonds to the Co(II) ions via its oxygen atom and the other one is involved as solvate molecules in the crystal structure. The structure also has sulfate ion to charge balance.
The Co(II) atom has distorted octahedral geometry, being ligated by five aqua ligands and a DMF ligand (Table 1). The coordination bond lengths were found 2.046 (7) Å for Co—ODMF and in the rage of 2.062–2.110 Å for Co—Oaqua. The O—H···O intermolecular hydrogen bonds formed three dimensional molecular network, in solid state. The sulphate ions plays major role to form the three-dimensional structure via formation of the hydrogen bonds. The DMF solvate units were capsulated between the complex units which locate along the b-axis, by the hydrogen bond interactions (Table 2).