metal-organic compounds
(1H-1,3-Benzimidazole-5,6-dicarboxylic acid)(5-carboxylato-1H-1,3-benzimidazole-6-carboxylic acid)silver(I) monohydrate
aCollege of Chemistry & Chemical Engineering, Shanxi Datong University, Shanxi 037009, People's Republic of China
*Correspondence e-mail: zhaihdtu@126.com
The title compound, [Ag(C9H5N2O4)(C9H6N2O4)]·H2O, contains one independent Ag atom, a neutral 1H-benzimidazole-5,6-dicarboxylic acid (bdcH), its monodeprotonated form, i.e. 5-carboxylato-1H-1,3-benzimidazole-6-carboxylic acid (bdc), and one solvent water molecule, the latter being disordered over three sites with site occupancy factors of 0.375 (× 2) and 0.25. In addition, the H atom on one carboxylic acid residue is disordered, being connected to each of the O atoms 50% of the time. The Ag atom is in a virtually linear geometry defined by two N atoms derived from the bdc and bdcH ligands. The three-dimensional supramolecular structure is stablized by extensive O—H⋯O and N—H⋯O hydrogen bonds. An intramolecular O—H⋯O hydrogen bond is also present.
Related literature
For related structures, see: Gao et al. (2008); Li et al. (2009); Lo et al. (2007); Wei et al. (2008); Yao et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536809044535/tk2558sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809044535/tk2558Isup2.hkl
A mixture of the bdc (0.0415 g, 0.20 mmol), AgNO3 (0.0340 g, 0.20 mmol) and water (10 ml) was heated to 430 K for 72 h in a 23 ml Teflon-lined stainless-steel autoclave. After the reaction, the bomb was cooled to room temperature in a rate of 278 K per hour. Colourless prismatic crystals were collected and dried in air.
For the bdc ligand, all H atoms were placed at calculated positions and were treated as riding on the parent atoms with C—H = 0.93 and O—H = 0.86 Å, and with Uiso(H) = 1.2 or 1.5 Ueq(C, O). The H atom on the carboxylic acid residue with the O3 and O4 atoms was disordered. This was modelled over two sites of equal weight.
The solvent water molecule was also disordered over three positions, with site occupancy factors of 0.375, 0.375 and 0.25, respectively. The H atoms were included for each partially occupied molecule with O—H distances of 0.85 Å, and with Uĩso~(H) = 1.2U~eq~(O).
N-Heterocyclic
as organic ligands attract attention not only because of versatile coordination modes but also owing to its ability to facilitate the formation of high-dimensional coordination polymers. One such example, namely, 1H-benzimidazole-5,6-dicarboxylic acid (bdcH), is a semi-rigid, multidentate ligand that can provide up to six donor atoms (two N and four O atoms) with variable coordination modes. This is therefore considered as an excellent candidate for generating 3-D architectures. Up to now, the reported complexes based on the bdc ligand are rare but have attracted recent interest (Lo et al., 2007; Gao et al., 2008; Wei et al., 2008; Yao et al., 2008; Li et al., 2009). Herein, the first Ag supramolecular compound based on the bdc ligand, namely [Ag(C9H5N2O2)(C9H6N2O2)].H2O, (I), is reported.As is shown in Fig. 1, the
consists of bdcH and bdc ligands, one Ag atom, and one solvent water molecule. The water molecule is disordered over three sites with site occupancy factors = 0.375 (x 2) and 0.25, see Experimental. The Ag atom has a linear coordination environment being bound to two N atoms derived from the bdc ligands.A packing diagram showing the 3-D supramolecular structure arising from a larg e number of hydrogen bonding interactions is shown in Fig. 2. Through the agency of intermolecular hydrogen bond interactions involving the bdc and bdcH ligands, Table 1, a layer structure is generated. These are connected into a 3-D network via hydrogen bonding interactions involving the water molecules.
For related structures, see: Gao et al. (2008); Li et al. (2009); Lo et al. (2007); Wei et al. (2008); Yao et al. (2008).
Data collection: APEX2 (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. Displacement ellipsoid plot (50% probability level) of (I), with atom numbering. The water molecule is fractionally occupied with site occupancy factors of 0.375, 0.375 and 0.25. | |
Fig. 2. The packing diagram of (I), with partially-occupied H atoms omitted for clarity. Hydrogen bonds are shown as dashed lines. |
[Ag(C9H5N2O4)(C9H6N2O4)]·H2O | F(000) = 2145.0 |
Mr = 537.37 | Dx = 1.885 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 2071 reflections |
a = 28.483 (3) Å | θ = 2.4–22.4° |
b = 18.6398 (17) Å | µ = 1.13 mm−1 |
c = 7.2251 (7) Å | T = 298 K |
β = 99.046 (1)° | Block, colourless |
V = 3788.2 (6) Å3 | 0.31 × 0.23 × 0.19 mm |
Z = 8 |
Bruker APEXII area-detector diffractometer | 3675 independent reflections |
Radiation source: fine-focus sealed tube | 2572 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.044 |
φ and ω scans | θmax = 26.0°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | h = −35→35 |
Tmin = 0.740, Tmax = 0.807 | k = −20→22 |
10329 measured reflections | l = −8→7 |
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)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.092 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.04P)2] where P = (Fo2 + 2Fc2)/3 |
3675 reflections | (Δ/σ)max = 0.001 |
307 parameters | Δρmax = 0.52 e Å−3 |
18 restraints | Δρmin = −0.59 e Å−3 |
[Ag(C9H5N2O4)(C9H6N2O4)]·H2O | V = 3788.2 (6) Å3 |
Mr = 537.37 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 28.483 (3) Å | µ = 1.13 mm−1 |
b = 18.6398 (17) Å | T = 298 K |
c = 7.2251 (7) Å | 0.31 × 0.23 × 0.19 mm |
β = 99.046 (1)° |
Bruker APEXII area-detector diffractometer | 3675 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | 2572 reflections with I > 2σ(I) |
Tmin = 0.740, Tmax = 0.807 | Rint = 0.044 |
10329 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 18 restraints |
wR(F2) = 0.092 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.52 e Å−3 |
3675 reflections | Δρmin = −0.59 e Å−3 |
307 parameters |
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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
Ag1 | 0.374338 (11) | 0.168833 (16) | 0.58373 (5) | 0.04290 (14) | |
O1 | 0.36561 (10) | −0.26003 (15) | 0.5821 (5) | 0.0606 (10) | |
H1 | 0.3710 | −0.3049 | 0.5832 | 0.073* | |
O2 | 0.44076 (10) | −0.23159 (15) | 0.5698 (5) | 0.0547 (9) | |
O3 | 0.45996 (10) | −0.11508 (16) | 0.3045 (4) | 0.0470 (8) | |
H3 | 0.4863 | −0.1056 | 0.2688 | 0.056* | 0.50 |
O4 | 0.50175 (10) | −0.08915 (16) | 0.5782 (4) | 0.0491 (8) | |
H4 | 0.5006 | −0.0830 | 0.6940 | 0.059* | 0.50 |
O5 | 0.30757 (10) | 0.53188 (16) | 0.6824 (5) | 0.0548 (9) | |
O6 | 0.28554 (11) | 0.42025 (16) | 0.6978 (5) | 0.0580 (10) | |
O7 | 0.37366 (11) | 0.60136 (15) | 0.6187 (5) | 0.0538 (9) | |
H7 | 0.3493 | 0.5781 | 0.6386 | 0.065* | |
O8 | 0.44651 (11) | 0.58811 (16) | 0.5706 (5) | 0.0612 (10) | |
N1 | 0.33935 (11) | 0.07120 (16) | 0.6181 (5) | 0.0314 (8) | |
N2 | 0.28969 (11) | −0.01398 (17) | 0.6799 (5) | 0.0338 (8) | |
H2A | 0.2646 | −0.0338 | 0.7095 | 0.041* | |
N3 | 0.41656 (11) | 0.25914 (16) | 0.5533 (5) | 0.0384 (9) | |
N4 | 0.47918 (11) | 0.32435 (17) | 0.5099 (5) | 0.0395 (9) | |
H4A | 0.5071 | 0.3347 | 0.4871 | 0.047* | |
C1 | 0.29744 (13) | 0.0560 (2) | 0.6672 (6) | 0.0354 (10) | |
H1A | 0.2757 | 0.0908 | 0.6905 | 0.043* | |
C2 | 0.32928 (12) | −0.0490 (2) | 0.6369 (6) | 0.0287 (9) | |
C3 | 0.36007 (13) | 0.00500 (19) | 0.5978 (6) | 0.0275 (9) | |
C4 | 0.40427 (13) | −0.01206 (19) | 0.5503 (6) | 0.0288 (9) | |
H4B | 0.4251 | 0.0237 | 0.5247 | 0.035* | |
C5 | 0.41601 (13) | −0.0831 (2) | 0.5424 (6) | 0.0301 (9) | |
C6 | 0.38460 (13) | −0.1378 (2) | 0.5819 (6) | 0.0293 (9) | |
C7 | 0.34103 (14) | −0.1213 (2) | 0.6295 (6) | 0.0349 (10) | |
H7A | 0.3202 | −0.1569 | 0.6557 | 0.042* | |
C8 | 0.40022 (15) | −0.2145 (2) | 0.5758 (6) | 0.0366 (10) | |
C9 | 0.46214 (15) | −0.0985 (2) | 0.4738 (7) | 0.0392 (11) | |
C10 | 0.46025 (15) | 0.2587 (2) | 0.5131 (7) | 0.0428 (11) | |
H10A | 0.4762 | 0.2170 | 0.4895 | 0.051* | |
C11 | 0.44556 (13) | 0.3720 (2) | 0.5500 (6) | 0.0327 (10) | |
C12 | 0.40613 (13) | 0.3312 (2) | 0.5766 (6) | 0.0327 (9) | |
C13 | 0.36540 (13) | 0.3643 (2) | 0.6177 (6) | 0.0327 (10) | |
H13A | 0.3396 | 0.3367 | 0.6393 | 0.039* | |
C14 | 0.36314 (13) | 0.4380 (2) | 0.6266 (6) | 0.0321 (10) | |
C15 | 0.40400 (14) | 0.47992 (19) | 0.5986 (6) | 0.0314 (9) | |
C16 | 0.44451 (14) | 0.4463 (2) | 0.5622 (6) | 0.0352 (10) | |
H16A | 0.4711 | 0.4732 | 0.5458 | 0.042* | |
C17 | 0.40890 (16) | 0.5620 (2) | 0.5952 (6) | 0.0395 (11) | |
C18 | 0.31614 (14) | 0.4648 (2) | 0.6704 (6) | 0.0399 (11) | |
O1W | 0.2366 (4) | 0.1989 (7) | 0.851 (2) | 0.126 (5) | 0.38 |
H1C | 0.2379 | 0.2042 | 0.9681 | 0.151* | 0.38 |
H1D | 0.2255 | 0.1565 | 0.8423 | 0.151* | 0.38 |
O2W | 0.2352 (4) | 0.2876 (6) | 0.5630 (19) | 0.108 (4) | 0.38 |
H2C | 0.2495 | 0.3257 | 0.6052 | 0.129* | 0.38 |
H2D | 0.2530 | 0.2509 | 0.5812 | 0.129* | 0.38 |
O3W | 0.2637 (6) | 0.2800 (10) | 0.809 (3) | 0.110 (6) | 0.25 |
H3C | 0.2702 | 0.3223 | 0.7767 | 0.131* | 0.25 |
H3D | 0.2564 | 0.2647 | 0.9111 | 0.131* | 0.25 |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ag1 | 0.0433 (2) | 0.02077 (18) | 0.0675 (3) | −0.00497 (15) | 0.01755 (17) | 0.00033 (16) |
O1 | 0.0401 (18) | 0.0188 (16) | 0.126 (3) | −0.0020 (13) | 0.0233 (19) | 0.0014 (17) |
O2 | 0.0414 (18) | 0.0328 (18) | 0.096 (3) | 0.0092 (14) | 0.0283 (17) | 0.0062 (17) |
O3 | 0.0345 (16) | 0.059 (2) | 0.051 (2) | −0.0025 (14) | 0.0147 (15) | −0.0074 (16) |
O4 | 0.0297 (16) | 0.064 (2) | 0.054 (2) | −0.0008 (15) | 0.0076 (15) | 0.0002 (16) |
O5 | 0.0422 (18) | 0.0341 (19) | 0.093 (3) | 0.0100 (14) | 0.0259 (18) | −0.0047 (17) |
O6 | 0.0364 (17) | 0.0408 (19) | 0.104 (3) | −0.0013 (15) | 0.0317 (18) | −0.0021 (18) |
O7 | 0.0478 (19) | 0.0226 (16) | 0.096 (3) | 0.0029 (14) | 0.0256 (19) | 0.0006 (16) |
O8 | 0.049 (2) | 0.0314 (19) | 0.110 (3) | −0.0119 (15) | 0.032 (2) | −0.0032 (18) |
N1 | 0.0261 (18) | 0.0219 (17) | 0.047 (2) | −0.0002 (14) | 0.0087 (15) | −0.0005 (15) |
N2 | 0.0201 (16) | 0.033 (2) | 0.051 (2) | −0.0036 (14) | 0.0140 (15) | −0.0005 (16) |
N3 | 0.0298 (18) | 0.0201 (18) | 0.068 (3) | 0.0007 (14) | 0.0167 (17) | 0.0010 (16) |
N4 | 0.0279 (18) | 0.030 (2) | 0.066 (3) | 0.0014 (15) | 0.0215 (17) | 0.0003 (17) |
C1 | 0.028 (2) | 0.028 (2) | 0.051 (3) | 0.0021 (18) | 0.008 (2) | −0.0022 (19) |
C2 | 0.0202 (19) | 0.028 (2) | 0.039 (3) | −0.0009 (16) | 0.0099 (17) | −0.0025 (18) |
C3 | 0.0240 (19) | 0.022 (2) | 0.037 (2) | −0.0045 (16) | 0.0071 (17) | 0.0005 (17) |
C4 | 0.0220 (19) | 0.024 (2) | 0.042 (3) | −0.0034 (16) | 0.0110 (18) | 0.0015 (17) |
C5 | 0.024 (2) | 0.030 (2) | 0.037 (3) | −0.0024 (17) | 0.0052 (17) | 0.0002 (18) |
C6 | 0.031 (2) | 0.0189 (19) | 0.038 (3) | −0.0007 (16) | 0.0056 (19) | 0.0010 (17) |
C7 | 0.032 (2) | 0.026 (2) | 0.049 (3) | −0.0042 (18) | 0.012 (2) | 0.0023 (19) |
C8 | 0.035 (2) | 0.027 (2) | 0.052 (3) | 0.0037 (19) | 0.017 (2) | −0.0011 (19) |
C9 | 0.034 (2) | 0.029 (2) | 0.057 (3) | 0.0048 (19) | 0.013 (2) | −0.001 (2) |
C10 | 0.038 (2) | 0.026 (2) | 0.068 (3) | 0.0064 (19) | 0.018 (2) | −0.001 (2) |
C11 | 0.028 (2) | 0.025 (2) | 0.047 (3) | −0.0020 (17) | 0.0123 (19) | 0.0020 (18) |
C12 | 0.033 (2) | 0.022 (2) | 0.045 (3) | 0.0006 (18) | 0.0105 (18) | 0.0026 (19) |
C13 | 0.028 (2) | 0.024 (2) | 0.049 (3) | −0.0010 (17) | 0.0154 (19) | 0.0035 (18) |
C14 | 0.028 (2) | 0.028 (2) | 0.042 (3) | 0.0061 (17) | 0.0098 (18) | −0.0003 (18) |
C15 | 0.033 (2) | 0.021 (2) | 0.042 (3) | −0.0025 (17) | 0.0095 (19) | 0.0004 (17) |
C16 | 0.029 (2) | 0.026 (2) | 0.052 (3) | −0.0052 (17) | 0.013 (2) | 0.0035 (19) |
C17 | 0.045 (3) | 0.029 (2) | 0.045 (3) | −0.003 (2) | 0.011 (2) | −0.001 (2) |
C18 | 0.031 (2) | 0.035 (3) | 0.055 (3) | 0.001 (2) | 0.011 (2) | 0.000 (2) |
O1W | 0.100 (7) | 0.111 (7) | 0.168 (9) | 0.017 (6) | 0.025 (7) | −0.013 (7) |
O2W | 0.096 (7) | 0.071 (6) | 0.158 (9) | −0.017 (6) | 0.025 (6) | 0.000 (6) |
O3W | 0.095 (9) | 0.102 (9) | 0.142 (10) | −0.019 (7) | 0.050 (8) | 0.029 (8) |
Ag1—N3 | 2.100 (3) | C2—C3 | 1.393 (5) |
Ag1—N1 | 2.108 (3) | C3—C4 | 1.393 (5) |
O1—C8 | 1.307 (5) | C4—C5 | 1.369 (5) |
O1—H1 | 0.8498 | C4—H4B | 0.9300 |
O2—C8 | 1.205 (5) | C5—C6 | 1.415 (5) |
O3—C9 | 1.254 (5) | C5—C9 | 1.503 (5) |
O3—H3 | 0.8499 | C6—C7 | 1.374 (5) |
O4—C9 | 1.267 (5) | C6—C8 | 1.500 (5) |
O4—H4 | 0.8500 | C7—H7A | 0.9300 |
O5—C18 | 1.280 (5) | C10—H10A | 0.9300 |
O6—C18 | 1.242 (5) | C11—C16 | 1.388 (5) |
O7—C17 | 1.277 (5) | C11—C12 | 1.394 (5) |
O7—H7 | 0.8499 | C12—C13 | 1.387 (5) |
O8—C17 | 1.215 (5) | C13—C14 | 1.378 (5) |
N1—C1 | 1.329 (5) | C13—H13A | 0.9300 |
N1—C3 | 1.385 (5) | C14—C15 | 1.442 (5) |
N2—C1 | 1.328 (5) | C14—C18 | 1.508 (5) |
N2—C2 | 1.380 (4) | C15—C16 | 1.375 (5) |
N2—H2A | 0.8600 | C15—C17 | 1.536 (5) |
N3—C10 | 1.322 (5) | C16—H16A | 0.9300 |
N3—C12 | 1.391 (5) | O1W—H1C | 0.8500 |
N4—C10 | 1.339 (5) | O1W—H1D | 0.8501 |
N4—C11 | 1.370 (5) | O2W—H2C | 0.8501 |
N4—H4A | 0.8600 | O2W—H2D | 0.8501 |
C1—H1A | 0.9300 | O3W—H3C | 0.8496 |
C2—C7 | 1.391 (5) | O3W—H3D | 0.8496 |
N3—Ag1—N1 | 173.32 (12) | C2—C7—H7A | 121.3 |
C8—O1—H1 | 120.1 | O2—C8—O1 | 124.2 (4) |
C9—O3—H3 | 109.5 | O2—C8—C6 | 122.9 (4) |
C9—O4—H4 | 115.8 | O1—C8—C6 | 112.9 (3) |
C17—O7—H7 | 114.2 | O3—C9—O4 | 121.2 (4) |
C1—N1—C3 | 104.7 (3) | O3—C9—C5 | 117.2 (4) |
C1—N1—Ag1 | 132.6 (3) | O4—C9—C5 | 121.4 (4) |
C3—N1—Ag1 | 122.6 (2) | N3—C10—N4 | 113.2 (3) |
C1—N2—C2 | 107.4 (3) | N3—C10—H10A | 123.4 |
C1—N2—H2A | 126.3 | N4—C10—H10A | 123.4 |
C2—N2—H2A | 126.3 | N4—C11—C16 | 133.1 (4) |
C10—N3—C12 | 105.0 (3) | N4—C11—C12 | 106.3 (3) |
C10—N3—Ag1 | 126.3 (3) | C16—C11—C12 | 120.6 (3) |
C12—N3—Ag1 | 128.6 (2) | C13—C12—N3 | 131.1 (3) |
C10—N4—C11 | 107.0 (3) | C13—C12—C11 | 120.4 (4) |
C10—N4—H4A | 126.5 | N3—C12—C11 | 108.5 (3) |
C11—N4—H4A | 126.5 | C14—C13—C12 | 120.0 (4) |
N2—C1—N1 | 113.2 (3) | C14—C13—H13A | 120.0 |
N2—C1—H1A | 123.4 | C12—C13—H13A | 120.0 |
N1—C1—H1A | 123.4 | C13—C14—C15 | 119.3 (3) |
N2—C2—C7 | 132.6 (3) | C13—C14—C18 | 112.9 (3) |
N2—C2—C3 | 105.5 (3) | C15—C14—C18 | 127.8 (4) |
C7—C2—C3 | 121.9 (3) | C16—C15—C14 | 120.0 (4) |
N1—C3—C2 | 109.3 (3) | C16—C15—C17 | 111.7 (3) |
N1—C3—C4 | 130.2 (3) | C14—C15—C17 | 128.2 (3) |
C2—C3—C4 | 120.5 (3) | C15—C16—C11 | 119.6 (3) |
C5—C4—C3 | 117.8 (3) | C15—C16—H16A | 120.2 |
C5—C4—H4B | 121.1 | C11—C16—H16A | 120.2 |
C3—C4—H4B | 121.1 | O8—C17—O7 | 121.2 (4) |
C4—C5—C6 | 121.5 (3) | O8—C17—C15 | 119.1 (4) |
C4—C5—C9 | 115.5 (3) | O7—C17—C15 | 119.7 (4) |
C6—C5—C9 | 122.9 (3) | O6—C18—O5 | 119.8 (4) |
C7—C6—C5 | 120.9 (3) | O6—C18—C14 | 118.7 (4) |
C7—C6—C8 | 120.3 (3) | O5—C18—C14 | 121.5 (4) |
C5—C6—C8 | 118.8 (3) | H1C—O1W—H1D | 97.8 |
C6—C7—C2 | 117.3 (3) | H2C—O2W—H2D | 112.1 |
C6—C7—H7A | 121.3 | H3C—O3W—H3D | 130.0 |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O7i | 0.85 | 1.77 | 2.603 (4) | 168 |
O3—H3···O3ii | 0.85 | 1.71 | 2.528 (5) | 162 |
O4—H4···O4iii | 0.85 | 1.66 | 2.500 (6) | 168 |
O7—H7···O5 | 0.85 | 1.54 | 2.389 (4) | 176 |
N2—H2A···O6iv | 0.86 | 1.88 | 2.733 (4) | 173 |
N4—H4A···O8v | 0.86 | 2.04 | 2.805 (4) | 148 |
Symmetry codes: (i) x, y−1, z; (ii) −x+1, y, −z+1/2; (iii) −x+1, y, −z+3/2; (iv) −x+1/2, y−1/2, −z+3/2; (v) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Ag(C9H5N2O4)(C9H6N2O4)]·H2O |
Mr | 537.37 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 298 |
a, b, c (Å) | 28.483 (3), 18.6398 (17), 7.2251 (7) |
β (°) | 99.046 (1) |
V (Å3) | 3788.2 (6) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 1.13 |
Crystal size (mm) | 0.31 × 0.23 × 0.19 |
Data collection | |
Diffractometer | Bruker APEXII area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.740, 0.807 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10329, 3675, 2572 |
Rint | 0.044 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.092, 1.04 |
No. of reflections | 3675 |
No. of parameters | 307 |
No. of restraints | 18 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.52, −0.59 |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP in SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O7i | 0.85 | 1.77 | 2.603 (4) | 168 |
O3—H3···O3ii | 0.85 | 1.71 | 2.528 (5) | 162 |
O4—H4···O4iii | 0.85 | 1.66 | 2.500 (6) | 168 |
O7—H7···O5 | 0.85 | 1.54 | 2.389 (4) | 176 |
N2—H2A···O6iv | 0.86 | 1.88 | 2.733 (4) | 173 |
N4—H4A···O8v | 0.86 | 2.04 | 2.805 (4) | 148 |
Symmetry codes: (i) x, y−1, z; (ii) −x+1, y, −z+1/2; (iii) −x+1, y, −z+3/2; (iv) −x+1/2, y−1/2, −z+3/2; (v) −x+1, −y+1, −z+1. |
Acknowledgements
This work was financially supported by Shanxi Datong University.
References
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Gao, Q., Gao, W.-H., Zhang, C.-Y. & Xie, Y.-B. (2008). Acta Cryst. E64, m928. Web of Science CrossRef IUCr Journals Google Scholar
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
N-Heterocyclic carboxylic acids as organic ligands attract attention not only because of versatile coordination modes but also owing to its ability to facilitate the formation of high-dimensional coordination polymers. One such example, namely, 1H-benzimidazole-5,6-dicarboxylic acid (bdcH), is a semi-rigid, multidentate ligand that can provide up to six donor atoms (two N and four O atoms) with variable coordination modes. This is therefore considered as an excellent candidate for generating 3-D architectures. Up to now, the reported complexes based on the bdc ligand are rare but have attracted recent interest (Lo et al., 2007; Gao et al., 2008; Wei et al., 2008; Yao et al., 2008; Li et al., 2009). Herein, the first Ag supramolecular compound based on the bdc ligand, namely [Ag(C9H5N2O2)(C9H6N2O2)].H2O, (I), is reported.
As is shown in Fig. 1, the asymmetric unit consists of bdcH and bdc ligands, one Ag atom, and one solvent water molecule. The water molecule is disordered over three sites with site occupancy factors = 0.375 (x 2) and 0.25, see Experimental. The Ag atom has a linear coordination environment being bound to two N atoms derived from the bdc ligands.
A packing diagram showing the 3-D supramolecular structure arising from a larg e number of hydrogen bonding interactions is shown in Fig. 2. Through the agency of intermolecular hydrogen bond interactions involving the bdc and bdcH ligands, Table 1, a layer structure is generated. These are connected into a 3-D network via hydrogen bonding interactions involving the water molecules.