metal-organic compounds
Intra- and supramolecular interactions in cis,mer-diaquatris(1H-imidazole-κN3)(terephthalato-κO)cobalt(II) monohydrate
aLaboratoire de Cristallographie-Thermodynamique, Faculté de Chimie, U.S.T.H.B., BP 32 El-Alia, Bab-Ezzouar 16111, Alger, Algeria, and bCRM 2,CNRS-UPRESA 7036, Université Henry Poincaré, Faculté des Sciences et Techniques, BP 70239, 54506 Vandoeuvres, Les Nancy Cedex, France
*Correspondence e-mail: guehria_laidoudi@yahoo.fr
In the title compound, [Co(C8H4O4)(C3H4N2)3(H2O)2]·H2O, the cisoid angles are in the range 85.59 (5)–93.56 (5)°, while two equal transoid angles deviate significantly from the ideal linear angle, the third being almost linear. One carboxylate group is almost coplanar [1.23 (13)°] with the plane of its parent aromatic ring, although it has one O-atom donor involved in one coordination and one hydrogen bond as acceptor. The other carboxylate group does not coordinate and is rotated out of this plane with a torsional twist of 17.27 (20)°. The coordination neutral entity, based on aqua ligands and two cyclic co-ligands seems, at first sight, monomeric. Strongly tight, via one intramolecular hydrogen bond between aqua and carboxylate O atoms, it brings out a quasi-planar six-membered ring around the CoII atom, turning the CoN3O3 coordination octahedron into a new building block. The rigidity of this feature associated with several hydrogen-bonded arrays yields an extended structure. In the resulting supramolecular packing, a binuclear hydrated CoII assembly, built up from triple strands driven by different heterosynthons, embodies the synergy of coordination, covalent and hydrogen bonds.
Related literature
For general background to important structural features inducing some interesting properties, see: Chen et al. (1996); Yang et al. (2002); Ye & Chen (2003); Xie et al. (2009); Baca et al. (2003). For related compounds or structures, see: Niu et al. (2004); Tong et al. (2002); Liu et al. (2001, 2003); Zeng et al. (1997).
Experimental
Crystal data
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Data collection
Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
10.1107/S1600536812011993/ds2181sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812011993/ds2181Isup2.hkl
A mixture of CoCl2,6H2O (0.24 g, 1 mmol), terephthalic acid (0.17 g,1 mmol), imidazole (0.14 g, 2 mmol) NaOH (0.08 g, 2 mmol) and water (15 ml) was stirred for 30 min at room temperature, then transferred in a 25 ml Teflon-lined stainless steel reactor, then sealed and heated at 120°C for 72 h. Upon cooling to room temperature, light-pink crystals of title compound suitable for X-ray crystallographic analysis were obtained.
H atoms attached to C atoms were positioned at calculated positions and were treated as riding on the parent atoms, with C—H=0.95 Å and Uiso(H)=1.2Ueq(C). Water hydrogen atoms and H atoms bonded to N atoms were located in a difference map and refined isotropically.
This Cobalt-based compound, is the first isomer evidenced, with two aqua ligands cis and three N-coordinated imidazole ligands meridional, relative to the CoII centre (Fig.1). Although it is built up from monomeric entity, it exhibits a packing with a relatively interesting metal-metal separation. As shown in Table 1, the Co-Ocarboxylate and the average Co—Ow distances are very closed and are comparable to those observed in related compounds (Niu et al., 2004; Tong et al., 2002). The three independent imidazole groups, and the single terephthalate dianion, both unidentate, participate respectively as donor and acceptor, in strong to moderate hydrogen bonds, and allow the recognition of supramolecular dimensionality (Table 2). The backbone of the architecture is the helical hydrogen-bonded ladder running along b axis, composed of alternating R44(10) and R33(8) heterosynthons (Fig.2), which are developed in turn, in bicyclic sheets, both of them containing a six-membered ring, and connected to imidazole ligands via secondary N atom. The former is associated with a crossed R22(6) and involves one bifurcated intermolecular H-bond. The latter shares a common Co—O(aqua) bond with a cycle formed of two coordination and three covalent bondings, beside one intramolecular H-bond (Table 2). The resulting quasi-planar six-membered ring, is responsible of environment's rigidity around the metal centre and changes the coordination octahedron in a new building block. The three imidazoles participate as donor with oxygen atom of adjacent carboxylates, and they bring about polymeric chain which mimics the carboxylate-histidine-zinc triad systems (Chen et al., 1996; Yang et al., 2002; Ye et al., 2003; Xie et al., 2009). As seen in Fig.2 and Fig.3, all these overlapping subnetworks lead to the formation of cross-linked supramolecular layers where additional single H-bonds provided by secondary N atom of the imidazoles in one hand, and the spacer of the dicarboxylate on other hand, achieve a well organized three-dimensional packing. Within this three-dimensional framework, the binuclear CoII assembly showing the shortest and probably interesting (Baca et al., 2003) separation metal-metal of 7.6536 (1) Å is built up from triple strand driven by R33(14), R44(16) and R55(18) heterosynthons (Fig.4). A comparison with the two chemically similar CoII compounds [Co(C3H4N2)4(H2O)2](C8H404), and [Co(C3H4N2)](C8H404).4H2O (Tong et al., 2002), as well as their isostructural compounds obtained with Mn(II) (Liu et al., 2001;2003) and Cu(II) (Zeng et al., 1997), reveals that their building blocks are mononuclear, and the terephthalate dianion doesn't get involved in coordination. With this study, we may confirm that in this structure, a competition takes place between terephthalate and water and it is probably the presence of both coordinated and uncoordinated water molecules, which builts a new building block, by enhancing the dicarboxylato ligand ability to get involved in coordination sphere.
For general background to important structural features inducing some interesting properties see: Chen et al. (1996); Yang et al. (2002); Ye et al. (2003); Xie et al. (2009); Baca et al. (2003). For related compounds or structures, see: Niu et al. (2004); Tong et al. (2002); Liu et al. (2001, 2003); Zeng et al. (1997).
Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell
CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED (Oxford Diffraction, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).Fig. 1. : The molecular structure of the title compound with displacement ellipsoids drawn at the 50% probability level. | |
Fig. 2. : Helical hydrogen-bonded ladder composed of R33(8) and R44(10). Symmetry codes: i: x + 1,y,z; ii: x - 1,y,z; v: -x + 1,-y + 1,-z + 1; vii: -x + 3/2,y - 1/2,-z + 3/2; viii: x - 1/2,-y - 1/2,-z - 1/2; ix: -x + 3/2,y + 1/2,-z + 3/2; x: -x + 1/2,y - 1/2,-z + 3/2 xi: -x + 1/2,y + 1/2,-z + 3/2, xii: x + 1, y + 1,z; xiii: x,y + 1,z; xiv: -x + 5/2,y + 1/2,-z + 3/2, xv: x - 1/2,-y + 1/2,z - 1/2 | |
Fig. 3. : Packing diagram viewed along [100] showing hydrogen bonds and ladder's layers. | |
Fig. 4. : Binuclear CoII assembly with triple strand. Symmetry codes: ii: x - 1,y,z; iii: -x,-y + 1,-z + 1; iv: -x,-y,-z + 1; x: -x + 1/2,y - 1/2,-z + 3/2 |
[Co(C8H4O4)(C3H4N2)3(H2O)2]·H2O | F(000) = 996 |
Mr = 481.34 | Dx = 1.615 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 35056 reflections |
a = 7.65363 (8) Å | θ = 3.3–32.9° |
b = 10.45169 (13) Å | µ = 0.92 mm−1 |
c = 24.7538 (3) Å | T = 291 K |
β = 90.227 (1)° | Prism, pink |
V = 1980.12 (4) Å3 | 0.21 × 0.14 × 0.08 mm |
Z = 4 |
Oxford Diffraction Xcalibur diffractometer | 4760 independent reflections |
Radiation source: fine-focus sealed tube | 4153 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.066 |
Detector resolution: 10.4508 pixels mm-1 | θmax = 28.0°, θmin = 3.4° |
wσcans | h = −10→10 |
Absorption correction: analytical [CrysAlis RED (Oxford Diffraction, 2009), using a multi-faceted crystal model based on expressions derived by Clark & Reid (1995)] | k = −13→13 |
Tmin = 0.871, Tmax = 0.935 | l = −32→32 |
86135 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)] = 0.029 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.071 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0265P)2 + 1.5429P] where P = (Fo2 + 2Fc2)/3 |
4760 reflections | (Δ/σ)max = 0.003 |
316 parameters | Δρmax = 0.40 e Å−3 |
0 restraints | Δρmin = −0.33 e Å−3 |
[Co(C8H4O4)(C3H4N2)3(H2O)2]·H2O | V = 1980.12 (4) Å3 |
Mr = 481.34 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 7.65363 (8) Å | µ = 0.92 mm−1 |
b = 10.45169 (13) Å | T = 291 K |
c = 24.7538 (3) Å | 0.21 × 0.14 × 0.08 mm |
β = 90.227 (1)° |
Oxford Diffraction Xcalibur diffractometer | 4760 independent reflections |
Absorption correction: analytical [CrysAlis RED (Oxford Diffraction, 2009), using a multi-faceted crystal model based on expressions derived by Clark & Reid (1995)] | 4153 reflections with I > 2σ(I) |
Tmin = 0.871, Tmax = 0.935 | Rint = 0.066 |
86135 measured reflections |
R[F2 > 2σ(F2)] = 0.029 | 0 restraints |
wR(F2) = 0.071 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | Δρmax = 0.40 e Å−3 |
4760 reflections | Δρmin = −0.33 e Å−3 |
316 parameters |
Experimental. Absorption correction: CrysAlis RED, Oxford Diffraction (2009) Analytical numerical absorption correction using a multifaceted crystal model based on expressions derived by Clark & Reid (1995). |
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. CrysAlis RED, Oxford Diffraction Ltd 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. |
x | y | z | Uiso*/Ueq | ||
Co | 0.44254 (2) | 0.144772 (19) | 0.652633 (8) | 0.00874 (6) | |
O1W | 0.52240 (15) | 0.33528 (11) | 0.67705 (4) | 0.0123 (2) | |
O2W | 0.60355 (16) | 0.07515 (12) | 0.71527 (5) | 0.0147 (2) | |
O3W | 0.66608 (15) | 0.36561 (12) | 0.78325 (5) | 0.0149 (2) | |
O1 | 0.29257 (14) | 0.22971 (10) | 0.58868 (4) | 0.0115 (2) | |
O2 | 0.31457 (15) | 0.43979 (11) | 0.60544 (4) | 0.0165 (2) | |
O3 | 0.05014 (14) | 0.36582 (10) | 0.32226 (4) | 0.0130 (2) | |
O4 | 0.16128 (14) | 0.56111 (11) | 0.33113 (4) | 0.0134 (2) | |
C1 | 0.28701 (19) | 0.34725 (15) | 0.57476 (6) | 0.0116 (3) | |
C2 | 0.24336 (19) | 0.37422 (15) | 0.51627 (6) | 0.0115 (3) | |
C3 | 0.21121 (19) | 0.27458 (15) | 0.48037 (6) | 0.0115 (3) | |
H3 | 0.2188 | 0.1885 | 0.4925 | 0.014* | |
C4 | 0.16812 (19) | 0.30000 (15) | 0.42695 (6) | 0.0117 (3) | |
H4 | 0.1412 | 0.2315 | 0.4031 | 0.014* | |
C5 | 0.16416 (19) | 0.42578 (15) | 0.40819 (6) | 0.0106 (3) | |
C6 | 0.2013 (2) | 0.52539 (15) | 0.44372 (6) | 0.0154 (3) | |
H6 | 0.2019 | 0.6111 | 0.4310 | 0.018* | |
C7 | 0.2375 (2) | 0.49999 (16) | 0.49776 (6) | 0.0160 (3) | |
H7 | 0.2584 | 0.5686 | 0.5221 | 0.019* | |
C8 | 0.12281 (19) | 0.45417 (14) | 0.34977 (6) | 0.0101 (3) | |
N1 | 0.66337 (16) | 0.13362 (12) | 0.60043 (5) | 0.0113 (3) | |
N2 | 0.93656 (18) | 0.13617 (13) | 0.57266 (6) | 0.0143 (3) | |
C9 | 0.8290 (2) | 0.13727 (15) | 0.61550 (6) | 0.0128 (3) | |
H9 | 0.8674 | 0.1403 | 0.6520 | 0.015* | |
C10 | 0.8336 (2) | 0.13227 (16) | 0.52700 (6) | 0.0155 (3) | |
H10 | 0.8722 | 0.1310 | 0.4906 | 0.019* | |
C11 | 0.6653 (2) | 0.13062 (15) | 0.54460 (6) | 0.0143 (3) | |
H11 | 0.5647 | 0.1278 | 0.5220 | 0.017* | |
N3 | 0.23535 (16) | 0.16873 (12) | 0.70755 (5) | 0.0115 (3) | |
N4 | −0.00080 (18) | 0.25190 (14) | 0.74341 (5) | 0.0145 (3) | |
C12 | 0.1779 (2) | 0.09015 (16) | 0.74877 (6) | 0.0146 (3) | |
H12 | 0.2327 | 0.0129 | 0.7599 | 0.017* | |
C13 | 0.0312 (2) | 0.14045 (16) | 0.77079 (6) | 0.0152 (3) | |
H13 | −0.0359 | 0.1054 | 0.7994 | 0.018* | |
C14 | 0.12406 (19) | 0.26542 (15) | 0.70594 (6) | 0.0127 (3) | |
H14 | 0.1315 | 0.3352 | 0.6815 | 0.015* | |
N5 | 0.36196 (16) | −0.04089 (12) | 0.62981 (5) | 0.0120 (3) | |
N6 | 0.23014 (18) | −0.22776 (14) | 0.63208 (6) | 0.0157 (3) | |
C15 | 0.4649 (2) | −0.13139 (15) | 0.60470 (6) | 0.0141 (3) | |
H15 | 0.5754 | −0.1150 | 0.5888 | 0.017* | |
C16 | 0.3850 (2) | −0.24738 (16) | 0.60607 (6) | 0.0159 (3) | |
H16 | 0.4278 | −0.3258 | 0.5919 | 0.019* | |
C17 | 0.2212 (2) | −0.10428 (16) | 0.64582 (6) | 0.0147 (3) | |
H17 | 0.1262 | −0.0667 | 0.6647 | 0.018* | |
H2N | 1.048 (3) | 0.147 (2) | 0.5743 (9) | 0.030 (6)* | |
H4N | −0.088 (3) | 0.301 (2) | 0.7480 (8) | 0.022 (5)* | |
H6N | 0.156 (3) | −0.283 (2) | 0.6416 (9) | 0.026 (6)* | |
H1W | 0.454 (3) | 0.381 (3) | 0.6584 (10) | 0.043 (7)* | |
H2W | 0.623 (3) | 0.360 (2) | 0.6673 (9) | 0.034 (6)* | |
H3W | 0.576 (3) | 0.085 (2) | 0.7469 (10) | 0.036 (7)* | |
H4W | 0.670 (3) | 0.014 (2) | 0.7123 (9) | 0.029 (6)* | |
H5W | 0.610 (3) | 0.365 (2) | 0.7556 (9) | 0.025 (6)* | |
H6W | 0.639 (3) | 0.301 (2) | 0.7995 (9) | 0.031 (6)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Co | 0.00883 (10) | 0.00915 (11) | 0.00823 (10) | −0.00041 (7) | 0.00022 (7) | 0.00042 (7) |
O1W | 0.0120 (5) | 0.0125 (6) | 0.0125 (5) | −0.0014 (4) | −0.0014 (4) | 0.0007 (4) |
O2W | 0.0183 (6) | 0.0166 (6) | 0.0093 (5) | 0.0060 (5) | −0.0001 (4) | 0.0001 (4) |
O3W | 0.0167 (6) | 0.0158 (6) | 0.0120 (5) | −0.0031 (5) | −0.0020 (5) | 0.0025 (5) |
O1 | 0.0127 (5) | 0.0111 (5) | 0.0107 (5) | −0.0006 (4) | −0.0015 (4) | 0.0024 (4) |
O2 | 0.0244 (6) | 0.0126 (5) | 0.0125 (5) | −0.0002 (5) | −0.0050 (5) | −0.0009 (4) |
O3 | 0.0158 (5) | 0.0130 (5) | 0.0101 (5) | −0.0024 (4) | −0.0015 (4) | −0.0003 (4) |
O4 | 0.0146 (5) | 0.0124 (5) | 0.0134 (5) | −0.0022 (4) | −0.0017 (4) | 0.0038 (4) |
C1 | 0.0094 (6) | 0.0142 (7) | 0.0113 (7) | −0.0001 (6) | 0.0001 (5) | 0.0019 (6) |
C2 | 0.0114 (7) | 0.0137 (7) | 0.0093 (7) | 0.0006 (6) | −0.0007 (5) | 0.0011 (6) |
C3 | 0.0116 (7) | 0.0103 (7) | 0.0127 (7) | 0.0001 (5) | −0.0008 (6) | 0.0022 (6) |
C4 | 0.0113 (7) | 0.0116 (7) | 0.0121 (7) | 0.0003 (6) | 0.0005 (5) | −0.0013 (6) |
C5 | 0.0095 (6) | 0.0125 (7) | 0.0098 (7) | −0.0001 (5) | 0.0000 (5) | 0.0006 (6) |
C6 | 0.0218 (8) | 0.0101 (7) | 0.0141 (7) | −0.0013 (6) | −0.0020 (6) | 0.0015 (6) |
C7 | 0.0230 (8) | 0.0117 (8) | 0.0131 (7) | −0.0015 (6) | −0.0037 (6) | −0.0015 (6) |
C8 | 0.0079 (6) | 0.0130 (7) | 0.0095 (7) | 0.0012 (5) | 0.0011 (5) | −0.0006 (6) |
N1 | 0.0120 (6) | 0.0118 (6) | 0.0101 (6) | −0.0012 (5) | 0.0007 (5) | −0.0010 (5) |
N2 | 0.0108 (6) | 0.0168 (7) | 0.0153 (7) | −0.0009 (5) | 0.0021 (5) | 0.0002 (5) |
C9 | 0.0120 (7) | 0.0138 (7) | 0.0126 (7) | −0.0012 (6) | 0.0009 (6) | 0.0000 (6) |
C10 | 0.0157 (7) | 0.0194 (8) | 0.0114 (7) | −0.0020 (6) | 0.0029 (6) | −0.0007 (6) |
C11 | 0.0153 (7) | 0.0173 (8) | 0.0105 (7) | −0.0021 (6) | 0.0004 (6) | 0.0002 (6) |
N3 | 0.0116 (6) | 0.0126 (6) | 0.0104 (6) | 0.0004 (5) | 0.0008 (5) | 0.0002 (5) |
N4 | 0.0121 (6) | 0.0157 (7) | 0.0158 (7) | 0.0017 (5) | 0.0021 (5) | −0.0027 (5) |
C12 | 0.0169 (7) | 0.0143 (8) | 0.0124 (7) | 0.0000 (6) | 0.0009 (6) | 0.0024 (6) |
C13 | 0.0151 (7) | 0.0182 (8) | 0.0123 (7) | −0.0036 (6) | 0.0023 (6) | 0.0010 (6) |
C14 | 0.0127 (7) | 0.0118 (7) | 0.0135 (7) | 0.0002 (6) | −0.0009 (6) | −0.0001 (6) |
N5 | 0.0121 (6) | 0.0115 (6) | 0.0124 (6) | −0.0016 (5) | 0.0011 (5) | −0.0002 (5) |
N6 | 0.0172 (7) | 0.0139 (7) | 0.0161 (7) | −0.0062 (6) | −0.0014 (5) | 0.0019 (5) |
C15 | 0.0156 (7) | 0.0131 (7) | 0.0135 (7) | −0.0001 (6) | 0.0019 (6) | −0.0009 (6) |
C16 | 0.0200 (8) | 0.0130 (8) | 0.0147 (7) | −0.0010 (6) | −0.0015 (6) | −0.0014 (6) |
C17 | 0.0131 (7) | 0.0158 (8) | 0.0151 (7) | −0.0023 (6) | 0.0008 (6) | −0.0004 (6) |
Co—O2W | 2.1064 (11) | N1—C9 | 1.3204 (19) |
Co—N3 | 2.1076 (13) | N1—C11 | 1.3825 (19) |
Co—N5 | 2.1124 (13) | N2—C9 | 1.345 (2) |
Co—N1 | 2.1347 (13) | N2—C10 | 1.376 (2) |
Co—O1 | 2.1442 (10) | N2—H2N | 0.86 (2) |
Co—O1W | 2.1680 (11) | C9—H9 | 0.9500 |
O1W—H1W | 0.85 (3) | C10—C11 | 1.362 (2) |
O1W—H2W | 0.85 (3) | C10—H10 | 0.9500 |
O2W—H3W | 0.82 (3) | C11—H11 | 0.9500 |
O2W—H4W | 0.82 (2) | N3—C14 | 1.322 (2) |
O3W—H5W | 0.81 (2) | N3—C12 | 1.383 (2) |
O3W—H6W | 0.82 (3) | N4—C14 | 1.342 (2) |
O1—C1 | 1.2765 (19) | N4—C13 | 1.369 (2) |
O2—C1 | 1.2471 (19) | N4—H4N | 0.85 (2) |
O3—C8 | 1.2738 (18) | C12—C13 | 1.356 (2) |
O4—C8 | 1.2450 (19) | C12—H12 | 0.9500 |
C1—C2 | 1.511 (2) | C13—H13 | 0.9500 |
C2—C3 | 1.390 (2) | C14—H14 | 0.9500 |
C2—C7 | 1.393 (2) | N5—C17 | 1.327 (2) |
C3—C4 | 1.387 (2) | N5—C15 | 1.380 (2) |
C3—H3 | 0.9500 | N6—C17 | 1.337 (2) |
C4—C5 | 1.395 (2) | N6—C16 | 1.366 (2) |
C4—H4 | 0.9500 | N6—H6N | 0.84 (2) |
C5—C6 | 1.391 (2) | C15—C16 | 1.358 (2) |
C5—C8 | 1.509 (2) | C15—H15 | 0.9500 |
C6—C7 | 1.391 (2) | C16—H16 | 0.9500 |
C6—H6 | 0.9500 | C17—H17 | 0.9500 |
C7—H7 | 0.9500 | ||
O2W—Co—N3 | 90.33 (5) | O3—C8—C5 | 117.34 (13) |
O2W—Co—N5 | 92.80 (5) | C9—N1—C11 | 105.60 (13) |
N3—Co—N5 | 93.56 (5) | C9—N1—Co | 126.08 (10) |
O2W—Co—N1 | 87.96 (5) | C11—N1—Co | 128.17 (10) |
N3—Co—N1 | 175.12 (5) | C9—N2—C10 | 107.31 (13) |
N5—Co—N1 | 91.09 (5) | C9—N2—H2N | 124.9 (15) |
O2W—Co—O1 | 175.14 (5) | C10—N2—H2N | 127.3 (15) |
N3—Co—O1 | 91.44 (4) | N1—C9—N2 | 111.54 (14) |
N5—Co—O1 | 91.60 (5) | N1—C9—H9 | 124.2 |
N1—Co—O1 | 89.91 (5) | N2—C9—H9 | 124.2 |
O2W—Co—O1W | 87.05 (5) | C11—C10—N2 | 106.07 (14) |
N3—Co—O1W | 85.59 (5) | C11—C10—H10 | 127.0 |
N5—Co—O1W | 179.13 (5) | N2—C10—H10 | 127.0 |
N1—Co—O1W | 89.76 (5) | C10—C11—N1 | 109.48 (14) |
O1—Co—O1W | 88.57 (4) | C10—C11—H11 | 125.3 |
Co—O1W—H1W | 101.0 (18) | N1—C11—H11 | 125.3 |
Co—O1W—H2W | 117.2 (16) | C14—N3—C12 | 105.64 (13) |
H1W—O1W—H2W | 104 (2) | C14—N3—Co | 123.89 (11) |
Co—O2W—H3W | 120.8 (17) | C12—N3—Co | 130.35 (11) |
Co—O2W—H4W | 124.3 (16) | C14—N4—C13 | 107.78 (14) |
H3W—O2W—H4W | 110 (2) | C14—N4—H4N | 126.4 (14) |
H5W—O3W—H6W | 106 (2) | C13—N4—H4N | 125.7 (14) |
C1—O1—Co | 127.94 (10) | C13—C12—N3 | 109.42 (14) |
O2—C1—O1 | 125.22 (14) | C13—C12—H12 | 125.3 |
O2—C1—C2 | 118.35 (14) | N3—C12—H12 | 125.3 |
O1—C1—C2 | 116.43 (13) | C12—C13—N4 | 106.11 (14) |
C3—C2—C7 | 119.42 (14) | C12—C13—H13 | 126.9 |
C3—C2—C1 | 120.70 (14) | N4—C13—H13 | 126.9 |
C7—C2—C1 | 119.87 (14) | N3—C14—N4 | 111.05 (14) |
C4—C3—C2 | 120.44 (14) | N3—C14—H14 | 124.5 |
C4—C3—H3 | 119.8 | N4—C14—H14 | 124.5 |
C2—C3—H3 | 119.8 | C17—N5—C15 | 104.94 (13) |
C3—C4—C5 | 120.18 (14) | C17—N5—Co | 127.98 (11) |
C3—C4—H4 | 119.9 | C15—N5—Co | 125.69 (10) |
C5—C4—H4 | 119.9 | C17—N6—C16 | 108.07 (14) |
C6—C5—C4 | 119.39 (14) | C17—N6—H6N | 123.5 (15) |
C6—C5—C8 | 120.01 (14) | C16—N6—H6N | 128.1 (15) |
C4—C5—C8 | 120.59 (13) | C16—C15—N5 | 110.03 (14) |
C7—C6—C5 | 120.30 (15) | C16—C15—H15 | 125.0 |
C7—C6—H6 | 119.9 | N5—C15—H15 | 125.0 |
C5—C6—H6 | 119.9 | C15—C16—N6 | 105.63 (14) |
C6—C7—C2 | 120.18 (15) | C15—C16—H16 | 127.2 |
C6—C7—H7 | 119.9 | N6—C16—H16 | 127.2 |
C2—C7—H7 | 119.9 | N5—C17—N6 | 111.33 (14) |
O4—C8—O3 | 123.78 (14) | N5—C17—H17 | 124.3 |
O4—C8—C5 | 118.87 (13) | N6—C17—H17 | 124.3 |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···O1i | 0.86 (2) | 2.09 (2) | 2.9204 (17) | 162 (2) |
N4—H4N···O3Wii | 0.85 (2) | 2.18 (2) | 2.9842 (18) | 157.0 (19) |
N4—H4N···O4iii | 0.85 (2) | 2.50 (2) | 2.9521 (18) | 114.5 (17) |
N6—H6N···O3iv | 0.84 (2) | 2.02 (2) | 2.8249 (18) | 162 (2) |
O1W—H1W···O2 | 0.85 (3) | 1.79 (3) | 2.6160 (16) | 163 (3) |
O1W—H2W···O4v | 0.85 (3) | 1.85 (3) | 2.6606 (16) | 161 (2) |
O2W—H3W···O3vi | 0.82 (3) | 1.95 (3) | 2.7516 (16) | 168 (2) |
O2W—H4W···O3Wvii | 0.82 (2) | 2.00 (2) | 2.8118 (17) | 172 (2) |
O3W—H5W···O1W | 0.81 (2) | 2.08 (2) | 2.8632 (16) | 164 (2) |
O3W—H6W···O3vi | 0.82 (3) | 1.95 (3) | 2.7528 (17) | 167 (2) |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) −x, −y+1, −z+1; (iv) −x, −y, −z+1; (v) −x+1, −y+1, −z+1; (vi) x+1/2, −y+1/2, z+1/2; (vii) −x+3/2, y−1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | [Co(C8H4O4)(C3H4N2)3(H2O)2]·H2O |
Mr | 481.34 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 291 |
a, b, c (Å) | 7.65363 (8), 10.45169 (13), 24.7538 (3) |
β (°) | 90.227 (1) |
V (Å3) | 1980.12 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.92 |
Crystal size (mm) | 0.21 × 0.14 × 0.08 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur |
Absorption correction | Analytical [CrysAlis RED (Oxford Diffraction, 2009), using a multi-faceted crystal model based on expressions derived by Clark & Reid (1995)] |
Tmin, Tmax | 0.871, 0.935 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 86135, 4760, 4153 |
Rint | 0.066 |
(sin θ/λ)max (Å−1) | 0.661 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.029, 0.071, 1.08 |
No. of reflections | 4760 |
No. of parameters | 316 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.40, −0.33 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2009), CrysAlis RED (Oxford Diffraction, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).
Co—O2W | 2.1064 (11) | Co—N1 | 2.1347 (13) |
Co—N3 | 2.1076 (13) | Co—O1 | 2.1442 (10) |
Co—N5 | 2.1124 (13) | Co—O1W | 2.1680 (11) |
O2W—Co—N3 | 90.33 (5) | N1—Co—O1 | 89.91 (5) |
O2W—Co—N5 | 92.80 (5) | O2W—Co—O1W | 87.05 (5) |
N3—Co—N5 | 93.56 (5) | N3—Co—O1W | 85.59 (5) |
O2W—Co—N1 | 87.96 (5) | N5—Co—O1W | 179.13 (5) |
N3—Co—N1 | 175.12 (5) | N1—Co—O1W | 89.76 (5) |
N5—Co—N1 | 91.09 (5) | O1—Co—O1W | 88.57 (4) |
O2W—Co—O1 | 175.14 (5) | O2—C1—O1 | 125.22 (14) |
N3—Co—O1 | 91.44 (4) | O4—C8—O3 | 123.78 (14) |
N5—Co—O1 | 91.60 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···O1i | 0.86 (2) | 2.09 (2) | 2.9204 (17) | 162 (2) |
N4—H4N···O3Wii | 0.85 (2) | 2.18 (2) | 2.9842 (18) | 157.0 (19) |
N4—H4N···O4iii | 0.85 (2) | 2.50 (2) | 2.9521 (18) | 114.5 (17) |
N6—H6N···O3iv | 0.84 (2) | 2.02 (2) | 2.8249 (18) | 162 (2) |
O1W—H1W···O2 | 0.85 (3) | 1.79 (3) | 2.6160 (16) | 163 (3) |
O1W—H2W···O4v | 0.85 (3) | 1.85 (3) | 2.6606 (16) | 161 (2) |
O2W—H3W···O3vi | 0.82 (3) | 1.95 (3) | 2.7516 (16) | 168 (2) |
O2W—H4W···O3Wvii | 0.82 (2) | 2.00 (2) | 2.8118 (17) | 172 (2) |
O3W—H5W···O1W | 0.81 (2) | 2.08 (2) | 2.8632 (16) | 164 (2) |
O3W—H6W···O3vi | 0.82 (3) | 1.95 (3) | 2.7528 (17) | 167 (2) |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) −x, −y+1, −z+1; (iv) −x, −y, −z+1; (v) −x+1, −y+1, −z+1; (vi) x+1/2, −y+1/2, z+1/2; (vii) −x+3/2, y−1/2, −z+3/2. |
References
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This Cobalt-based compound, is the first isomer evidenced, with two aqua ligands cis and three N-coordinated imidazole ligands meridional, relative to the CoII centre (Fig.1). Although it is built up from monomeric entity, it exhibits a packing with a relatively interesting metal-metal separation. As shown in Table 1, the Co-Ocarboxylate and the average Co—Ow distances are very closed and are comparable to those observed in related compounds (Niu et al., 2004; Tong et al., 2002). The three independent imidazole groups, and the single terephthalate dianion, both unidentate, participate respectively as donor and acceptor, in strong to moderate hydrogen bonds, and allow the recognition of supramolecular dimensionality (Table 2). The backbone of the architecture is the helical hydrogen-bonded ladder running along b axis, composed of alternating R44(10) and R33(8) heterosynthons (Fig.2), which are developed in turn, in bicyclic sheets, both of them containing a six-membered ring, and connected to imidazole ligands via secondary N atom. The former is associated with a crossed R22(6) and involves one bifurcated intermolecular H-bond. The latter shares a common Co—O(aqua) bond with a cycle formed of two coordination and three covalent bondings, beside one intramolecular H-bond (Table 2). The resulting quasi-planar six-membered ring, is responsible of environment's rigidity around the metal centre and changes the coordination octahedron in a new building block. The three imidazoles participate as donor with oxygen atom of adjacent carboxylates, and they bring about polymeric chain which mimics the carboxylate-histidine-zinc triad systems (Chen et al., 1996; Yang et al., 2002; Ye et al., 2003; Xie et al., 2009). As seen in Fig.2 and Fig.3, all these overlapping subnetworks lead to the formation of cross-linked supramolecular layers where additional single H-bonds provided by secondary N atom of the imidazoles in one hand, and the spacer of the dicarboxylate on other hand, achieve a well organized three-dimensional packing. Within this three-dimensional framework, the binuclear CoII assembly showing the shortest and probably interesting (Baca et al., 2003) separation metal-metal of 7.6536 (1) Å is built up from triple strand driven by R33(14), R44(16) and R55(18) heterosynthons (Fig.4). A comparison with the two chemically similar CoII compounds [Co(C3H4N2)4(H2O)2](C8H404), and [Co(C3H4N2)](C8H404).4H2O (Tong et al., 2002), as well as their isostructural compounds obtained with Mn(II) (Liu et al., 2001;2003) and Cu(II) (Zeng et al., 1997), reveals that their building blocks are mononuclear, and the terephthalate dianion doesn't get involved in coordination. With this study, we may confirm that in this structure, a competition takes place between terephthalate and water and it is probably the presence of both coordinated and uncoordinated water molecules, which builts a new building block, by enhancing the dicarboxylato ligand ability to get involved in coordination sphere.