metal-organic compounds
Bis(μ-5-carboxylatotetrazolido)bis[aqua(2,2′-bipyridyl)cadmium(II)]
aShaoyang Medical College, Shaoyang, Hunan 422000, People's Republic of China, and bCollege of Chemistry and Bio-engineering, Yichun University, Yichun, Jiangxi 336000, People's Republic of China
*Correspondence e-mail: sshj_2008@yahoo.cn
In the title dinuclear CdII complex, [Cd2(C2N4O2)2(C10H8N2)2(H2O)2], each Cd atom is in a slightly distorted octahedral coordination by two N atoms and one O atom of two 1H-tetrazole-5-carboxylate (TZC) ligands, two N atoms of a 2,2′-bipyridyl ligand and one water O atom. The TZC ligand acts in a tridentate N,O-chelating N-bridging mode to two symmetry-equivalent CdII atoms. The complex reveals molecular Ci symmetry. Extensive O—H⋯O hydrogen bonding plays an important role in the crystal packing.
Related literature
For the structural topologies and varied properties such as molecular magnetism, molecular absorption, catalysis, non-linear optics and luminescence of coordination complexes with tetrazolate-based ligands, see: Zhao et al. (2008); Cheng et al. (2007). For related structures, see: Wu et al. (2009; 2010) For related literature on 1H-tetrazoles, see: Jia et al. (2009); Zhong et al. (2010).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1998); cell SAINT (Bruker, 1998); 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: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536810027613/kp2269sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810027613/kp2269Isup2.hkl
A mixture of Cd(NO3)2 4H2O (0.5 mmol), TZC (0.5 mmol), KOH (0.5 mmol) and 2,2'-bipy (0.5 mmol) in aqueous solution (15 ml) was sealed in a 25 ml Teflon-lined stainless steel vessel under autogenous pressure and heated at 383 K for 3 days, and then slowly cooled to room temperature. Colourless crystals suitable for X-ray analyses were obtained, washed with distilled water and dried in air. Yield: 50% (based on Cd).
The H atoms of the 2,2'-bipy were placed in geometrically idealized positions with C—H distances of 0.93 Å, and were refined isotropic using a riding model with Uiso(H) = 1.2Ueq(C). The H atoms of the coordinated water molecules were assigned in the difference Fourier maps and refined isotropically.
Coordination complexes with tetrazolate-based ligands have been the subject of intense research efforts in recent years, owing to their enormous variety of interesting structural topologies, and wide physical properties such as molecular magnetism, molecular absorption, catalysis, non-linear optics, and luminescence (Zhao, 2008; Cheng et al., 2007). The crystal structures and properties of metal complexes based on tetrazolate-5-carboxylato ligand have been reported in several papers (Wu et al., 2009; Wu et al., 2010) in recent years. Herein, we report the synthesis and
of its cadmium(II) complex.In the title compound (I), the
comprises a half of the molecule (Fig. 1) and an inversion symmetry generates a dinuclear complex. The bond lengths (Table 1) and angles around Cd1 atom suggests a slightly distorted octahedral geometry. The TZC ligand acts as a tridentate linker to chelate the Cd atom and bridges the other Cd atom in a µ2-N2:O1,N1 coordination mode (Fig. 1). Two Cd atoms are bridged by tetrazolate groups from two symmetry-related TZC ligands to form one six-membered ring (Cd1—N1—N2—Cd1A—N1A—N2A). There are O–H···O, C–H···N, C–H···O intermolecular hydrogen bonds (Table 2). The molecules are held together by intermolecular hydrogen bonding interactions, forming a three-dimensional network (Fig. 2).For the structural topologies and varied properties such as molecular magnetism, molecular absorption, catalysis, non-linear optics and luminescence of coordination complexes with tetrazolate-based ligands, see: Zhao et al. (2008); Cheng et al. (2007). For related structures, see: Wu etal. (2009; 2010) For related literature on 1-H-tetrazoles, see: Jia et al. (2009); Zhong et al., (2010).
Data collection: SMART (Bruker, 1998); cell
SAINT (Bruker, 1998); data reduction: SAINT (Bruker, 1998); 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: SHELXTL (Sheldrick, 2008).Fig. 1. The structure of (I), showing 30% probability displacement ellipsoids and the atom-labeling scheme. Symmetry code: (A) -x + 1, -y, -z + 1. | |
Fig. 2. Three-dimensional network of hydrogen bonds. |
[Cd2(C2N4O2)2(C10H8N2)2(H2O)2] | Z = 1 |
Mr = 797.32 | F(000) = 392 |
Triclinic, P1 | Dx = 2.015 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.5218 (13) Å | Cell parameters from 2926 reflections |
b = 9.6372 (16) Å | θ = 2.7–27.0° |
c = 9.7335 (16) Å | µ = 1.69 mm−1 |
α = 75.628 (3)° | T = 173 K |
β = 89.686 (3)° | Block, colourless |
γ = 74.461 (2)° | 0.28 × 0.22 × 0.16 mm |
V = 657.10 (19) Å3 |
Bruker SMART CCD area-detector diffractometer | 2268 independent reflections |
Radiation source: fine-focus sealed tube | 1930 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.019 |
phi and ω scans | θmax = 25.0°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | h = −8→8 |
Tmin = 0.650, Tmax = 0.774 | k = −11→11 |
3760 measured reflections | l = −11→11 |
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)] = 0.025 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.066 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.11 | w = 1/[σ2(Fo2) + (0.0331P)2 + 0.4626P] where P = (Fo2 + 2Fc2)/3 |
2168 reflections | (Δ/σ)max < 0.001 |
207 parameters | Δρmax = 0.70 e Å−3 |
3 restraints | Δρmin = −0.47 e Å−3 |
[Cd2(C2N4O2)2(C10H8N2)2(H2O)2] | γ = 74.461 (2)° |
Mr = 797.32 | V = 657.10 (19) Å3 |
Triclinic, P1 | Z = 1 |
a = 7.5218 (13) Å | Mo Kα radiation |
b = 9.6372 (16) Å | µ = 1.69 mm−1 |
c = 9.7335 (16) Å | T = 173 K |
α = 75.628 (3)° | 0.28 × 0.22 × 0.16 mm |
β = 89.686 (3)° |
Bruker SMART CCD area-detector diffractometer | 2268 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | 1930 reflections with I > 2σ(I) |
Tmin = 0.650, Tmax = 0.774 | Rint = 0.019 |
3760 measured reflections |
R[F2 > 2σ(F2)] = 0.025 | 3 restraints |
wR(F2) = 0.066 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.11 | Δρmax = 0.70 e Å−3 |
2168 reflections | Δρmin = −0.47 e Å−3 |
207 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 | ||
Cd1 | 0.40965 (3) | 0.23221 (3) | 0.36929 (3) | 0.01494 (11) | |
O1 | 0.6019 (3) | 0.3838 (3) | 0.3780 (3) | 0.0205 (6) | |
O2 | 0.8715 (3) | 0.3914 (3) | 0.4648 (3) | 0.0212 (6) | |
O3 | 0.2432 (3) | 0.3036 (3) | 0.5528 (3) | 0.0199 (6) | |
N1 | 0.6687 (4) | 0.0890 (3) | 0.5152 (3) | 0.0145 (6) | |
N2 | 0.7360 (4) | −0.0460 (3) | 0.6050 (3) | 0.0150 (6) | |
N3 | 0.8896 (4) | −0.0486 (4) | 0.6726 (3) | 0.0187 (7) | |
N4 | 0.9234 (4) | 0.0835 (3) | 0.6289 (3) | 0.0181 (7) | |
N9 | 0.2429 (4) | 0.4286 (3) | 0.1938 (3) | 0.0151 (6) | |
N10 | 0.5150 (4) | 0.1995 (3) | 0.1484 (3) | 0.0167 (7) | |
C1 | 0.7862 (5) | 0.1654 (4) | 0.5330 (4) | 0.0142 (8) | |
C2 | 0.7527 (5) | 0.3265 (4) | 0.4521 (4) | 0.0174 (8) | |
C3 | 0.1195 (5) | 0.5462 (4) | 0.2218 (4) | 0.0190 (8) | |
H3 | 0.0696 | 0.5230 | 0.3173 | 0.023* | |
C4 | 0.0345 (5) | 0.6728 (4) | 0.1188 (4) | 0.0230 (9) | |
H4 | −0.0526 | 0.7532 | 0.1432 | 0.028* | |
C5 | 0.0777 (5) | 0.6817 (4) | −0.0214 (4) | 0.0232 (9) | |
H5 | 0.0196 | 0.7672 | −0.0951 | 0.028* | |
C6 | 0.2080 (5) | 0.5619 (4) | −0.0508 (4) | 0.0189 (8) | |
H6 | 0.2427 | 0.5655 | −0.1454 | 0.023* | |
C7 | 0.2875 (5) | 0.4368 (4) | 0.0589 (4) | 0.0156 (8) | |
C8 | 0.4293 (5) | 0.3049 (4) | 0.0329 (4) | 0.0157 (8) | |
C9 | 0.4693 (5) | 0.2928 (5) | −0.1038 (4) | 0.0240 (9) | |
H9 | 0.4056 | 0.3679 | −0.1842 | 0.029* | |
C10 | 0.6035 (6) | 0.1695 (5) | −0.1209 (4) | 0.0289 (10) | |
H10 | 0.6316 | 0.1582 | −0.2134 | 0.035* | |
C11 | 0.6960 (6) | 0.0634 (5) | −0.0029 (4) | 0.0282 (9) | |
H11 | 0.7911 | −0.0205 | −0.0128 | 0.034* | |
C12 | 0.6479 (5) | 0.0810 (4) | 0.1307 (4) | 0.0243 (9) | |
H12 | 0.7106 | 0.0072 | 0.2123 | 0.029* | |
H3A | 0.149 (5) | 0.288 (5) | 0.531 (5) | 0.037 (14)* | |
H3B | 0.234 (6) | 0.388 (4) | 0.563 (5) | 0.045 (15)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cd1 | 0.01564 (15) | 0.01420 (16) | 0.01338 (16) | −0.00440 (11) | −0.00143 (10) | −0.00027 (11) |
O1 | 0.0236 (14) | 0.0146 (13) | 0.0214 (14) | −0.0080 (11) | −0.0036 (11) | 0.0020 (11) |
O2 | 0.0216 (13) | 0.0211 (14) | 0.0258 (15) | −0.0135 (12) | 0.0028 (11) | −0.0069 (12) |
O3 | 0.0193 (14) | 0.0196 (15) | 0.0226 (15) | −0.0068 (12) | 0.0009 (11) | −0.0071 (12) |
N1 | 0.0158 (15) | 0.0149 (16) | 0.0129 (16) | −0.0050 (13) | 0.0013 (12) | −0.0028 (13) |
N2 | 0.0163 (15) | 0.0139 (16) | 0.0122 (16) | −0.0035 (13) | 0.0010 (12) | 0.0008 (13) |
N3 | 0.0174 (15) | 0.0203 (17) | 0.0183 (17) | −0.0062 (14) | 0.0006 (13) | −0.0037 (14) |
N4 | 0.0158 (15) | 0.0193 (17) | 0.0186 (17) | −0.0039 (13) | 0.0000 (13) | −0.0048 (14) |
N9 | 0.0146 (14) | 0.0157 (16) | 0.0154 (16) | −0.0054 (13) | 0.0004 (12) | −0.0035 (13) |
N10 | 0.0159 (15) | 0.0134 (16) | 0.0204 (17) | −0.0047 (13) | 0.0021 (13) | −0.0027 (13) |
C1 | 0.0130 (16) | 0.019 (2) | 0.0132 (18) | −0.0056 (15) | 0.0047 (14) | −0.0077 (16) |
C2 | 0.0219 (19) | 0.022 (2) | 0.0133 (19) | −0.0091 (17) | 0.0087 (16) | −0.0108 (16) |
C3 | 0.0181 (18) | 0.020 (2) | 0.017 (2) | −0.0035 (16) | 0.0011 (16) | −0.0034 (16) |
C4 | 0.0218 (19) | 0.018 (2) | 0.025 (2) | −0.0004 (17) | −0.0010 (17) | −0.0043 (17) |
C5 | 0.0231 (19) | 0.017 (2) | 0.023 (2) | −0.0026 (17) | −0.0066 (17) | 0.0033 (17) |
C6 | 0.0233 (19) | 0.020 (2) | 0.0126 (19) | −0.0088 (17) | 0.0002 (16) | 0.0000 (16) |
C7 | 0.0150 (17) | 0.0170 (19) | 0.0151 (19) | −0.0071 (15) | −0.0031 (15) | −0.0018 (16) |
C8 | 0.0146 (17) | 0.0166 (19) | 0.0159 (19) | −0.0058 (15) | 0.0015 (15) | −0.0027 (16) |
C9 | 0.028 (2) | 0.027 (2) | 0.017 (2) | −0.0085 (18) | 0.0041 (17) | −0.0045 (17) |
C10 | 0.034 (2) | 0.031 (2) | 0.022 (2) | −0.007 (2) | 0.0113 (19) | −0.0107 (19) |
C11 | 0.033 (2) | 0.018 (2) | 0.029 (2) | −0.0001 (18) | 0.0075 (19) | −0.0059 (18) |
C12 | 0.024 (2) | 0.016 (2) | 0.029 (2) | −0.0026 (17) | 0.0019 (17) | −0.0024 (17) |
Cd1—N9 | 2.285 (3) | N10—C12 | 1.349 (5) |
Cd1—N2i | 2.304 (3) | C1—C2 | 1.510 (5) |
Cd1—N1 | 2.310 (3) | C3—C4 | 1.372 (5) |
Cd1—O3 | 2.314 (3) | C3—H3 | 0.9966 |
Cd1—O1 | 2.330 (2) | C4—C5 | 1.388 (6) |
Cd1—N10 | 2.352 (3) | C4—H4 | 0.9500 |
O1—C2 | 1.260 (4) | C5—C6 | 1.389 (5) |
O2—C2 | 1.242 (4) | C5—H5 | 0.9500 |
O3—H3A | 0.80 (2) | C6—C7 | 1.390 (5) |
O3—H3B | 0.83 (2) | C6—H6 | 0.9500 |
N1—C1 | 1.329 (5) | C7—C8 | 1.500 (5) |
N1—N2 | 1.342 (4) | C8—C9 | 1.389 (5) |
N2—N3 | 1.324 (4) | C9—C10 | 1.382 (5) |
N2—Cd1i | 2.304 (3) | C9—H9 | 0.9500 |
N3—N4 | 1.330 (4) | C10—C11 | 1.376 (6) |
N4—C1 | 1.330 (5) | C10—H10 | 0.9500 |
N9—C7 | 1.342 (5) | C11—C12 | 1.386 (6) |
N9—C3 | 1.344 (5) | C11—H11 | 0.9500 |
N10—C8 | 1.342 (5) | C12—H12 | 0.9500 |
N9—Cd1—N2i | 106.72 (10) | N4—C1—C2 | 127.8 (3) |
N9—Cd1—N1 | 155.62 (10) | O2—C2—O1 | 125.7 (4) |
N2i—Cd1—N1 | 96.01 (10) | O2—C2—C1 | 118.7 (3) |
N9—Cd1—O3 | 95.41 (10) | O1—C2—C1 | 115.6 (3) |
N2i—Cd1—O3 | 87.65 (10) | N9—C3—C4 | 123.2 (3) |
N1—Cd1—O3 | 94.18 (9) | N9—C3—H3 | 113.3 |
N9—Cd1—O1 | 85.09 (10) | C4—C3—H3 | 121.4 |
N2i—Cd1—O1 | 168.16 (9) | C3—C4—C5 | 119.0 (4) |
N1—Cd1—O1 | 72.19 (10) | C3—C4—H4 | 120.5 |
O3—Cd1—O1 | 92.14 (9) | C5—C4—H4 | 120.5 |
N9—Cd1—N10 | 71.32 (10) | C4—C5—C6 | 118.2 (4) |
N2i—Cd1—N10 | 91.88 (10) | C4—C5—H5 | 120.9 |
N1—Cd1—N10 | 99.78 (10) | C6—C5—H5 | 120.9 |
O3—Cd1—N10 | 166.00 (10) | C5—C6—C7 | 119.6 (3) |
O1—Cd1—N10 | 91.16 (10) | C5—C6—H6 | 120.2 |
C2—O1—Cd1 | 118.0 (2) | C7—C6—H6 | 120.2 |
Cd1—O3—H3A | 96 (3) | N9—C7—C6 | 121.7 (3) |
Cd1—O3—H3B | 119 (3) | N9—C7—C8 | 116.5 (3) |
H3A—O3—H3B | 117 (3) | C6—C7—C8 | 121.7 (3) |
C1—N1—N2 | 104.9 (3) | N10—C8—C9 | 121.9 (3) |
C1—N1—Cd1 | 113.4 (2) | N10—C8—C7 | 116.5 (3) |
N2—N1—Cd1 | 141.1 (2) | C9—C8—C7 | 121.5 (3) |
N3—N2—N1 | 108.9 (3) | C10—C9—C8 | 118.8 (4) |
N3—N2—Cd1i | 128.6 (2) | C10—C9—H9 | 120.6 |
N1—N2—Cd1i | 122.5 (2) | C8—C9—H9 | 120.6 |
N2—N3—N4 | 109.4 (3) | C11—C10—C9 | 119.5 (4) |
N3—N4—C1 | 105.2 (3) | C11—C10—H10 | 120.2 |
C7—N9—C3 | 118.2 (3) | C9—C10—H10 | 120.2 |
C7—N9—Cd1 | 118.7 (2) | C10—C11—C12 | 118.8 (4) |
C3—N9—Cd1 | 122.4 (2) | C10—C11—H11 | 120.6 |
C8—N10—C12 | 118.8 (3) | C12—C11—H11 | 120.6 |
C8—N10—Cd1 | 116.4 (2) | N10—C12—C11 | 122.1 (4) |
C12—N10—Cd1 | 124.7 (3) | N10—C12—H12 | 119.0 |
N1—C1—N4 | 111.6 (3) | C11—C12—H12 | 119.0 |
N1—C1—C2 | 120.6 (3) |
Symmetry code: (i) −x+1, −y, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H3B···O2ii | 0.83 (2) | 2.01 (3) | 2.794 (4) | 158 (4) |
O3—H3A···O2iii | 0.80 (2) | 2.09 (4) | 2.769 (4) | 143 (4) |
Symmetry codes: (ii) −x+1, −y+1, −z+1; (iii) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | [Cd2(C2N4O2)2(C10H8N2)2(H2O)2] |
Mr | 797.32 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 173 |
a, b, c (Å) | 7.5218 (13), 9.6372 (16), 9.7335 (16) |
α, β, γ (°) | 75.628 (3), 89.686 (3), 74.461 (2) |
V (Å3) | 657.10 (19) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 1.69 |
Crystal size (mm) | 0.28 × 0.22 × 0.16 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 1998) |
Tmin, Tmax | 0.650, 0.774 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3760, 2268, 1930 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.025, 0.066, 1.11 |
No. of reflections | 2168 |
No. of parameters | 207 |
No. of restraints | 3 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.70, −0.47 |
Computer programs: SMART (Bruker, 1998), SAINT (Bruker, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
Cd1—N9 | 2.285 (3) | Cd1—O3 | 2.314 (3) |
Cd1—N2i | 2.304 (3) | Cd1—O1 | 2.330 (2) |
Cd1—N1 | 2.310 (3) | Cd1—N10 | 2.352 (3) |
Symmetry code: (i) −x+1, −y, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H3B···O2ii | 0.83 (2) | 2.01 (3) | 2.794 (4) | 158 (4) |
O3—H3A···O2iii | 0.80 (2) | 2.09 (4) | 2.769 (4) | 143 (4) |
Symmetry codes: (ii) −x+1, −y+1, −z+1; (iii) x−1, y, z. |
References
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Coordination complexes with tetrazolate-based ligands have been the subject of intense research efforts in recent years, owing to their enormous variety of interesting structural topologies, and wide physical properties such as molecular magnetism, molecular absorption, catalysis, non-linear optics, and luminescence (Zhao, 2008; Cheng et al., 2007). The crystal structures and properties of metal complexes based on tetrazolate-5-carboxylato ligand have been reported in several papers (Wu et al., 2009; Wu et al., 2010) in recent years. Herein, we report the synthesis and crystal structure of its cadmium(II) complex.
In the title compound (I), the asymmetric unit comprises a half of the molecule (Fig. 1) and an inversion symmetry generates a dinuclear complex. The bond lengths (Table 1) and angles around Cd1 atom suggests a slightly distorted octahedral geometry. The TZC ligand acts as a tridentate linker to chelate the Cd atom and bridges the other Cd atom in a µ2-N2:O1,N1 coordination mode (Fig. 1). Two Cd atoms are bridged by tetrazolate groups from two symmetry-related TZC ligands to form one six-membered ring (Cd1—N1—N2—Cd1A—N1A—N2A). There are O–H···O, C–H···N, C–H···O intermolecular hydrogen bonds (Table 2). The molecules are held together by intermolecular hydrogen bonding interactions, forming a three-dimensional network (Fig. 2).