Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807049197/at2417sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807049197/at2417Isup2.hkl |
CCDC reference: 667152
The title compound was synthesized as crystals by a hydrothermal method, with the ligand, 5-(pyrimidin-2-yl)tetrazolato formed during the reaction procedure from the pyrimidine-2-carbonitrile and NaN3: A mixture of CuCl2.2H2O (17 mg, 0.1 mmol), NaN3 (26 mg, 0.4 mmol) and pyrimidine-2-carbonitrile (21 mg, 0.2 mmol) in water (10 ml) was placed in a Teflon-lined stainless-steel Parr bomb that was heated at 443 K for 48 h. Blue crystals of (I) were collected after the bomb was allowed to cool to room temperature in the period of 24 h. Yield, 20% based on CuII. Caution: Azide and tetrazole derivatives are potentially explosive. Although we have met no problems in this work, only a small amount of them should be prepared and handled with great caution.
H atoms of organic ligands were included in calculated positions and treated in the subsequent refinement as riding atoms, with C—H = 0.93 Å and Uiso(H) = 1.2 Ueq(C). The H atoms of water molecules were located in Fourier difference map and refined with bond restraints O—H = 0.85 (1) Å, and with Uiso(H) = 1.5 Ueq (O).
The crystal structures of NaII, MnII, FeII, CoII, NiII and Zn(II) complexes with 5-(pyrimidin-2-yl)tetrazolate group have been reported recently (Liu & Fan, 2007; Rodríguez et al., 2005, 2007; Rodríguez & Colacio (2006); Zhang et al., 2007). Such complexes were obtained by either the direction reaction of the ligand, 2-(1H-tetrazol-5-yl)pyrimidine or the in situ reaction from pyrimidine-2-carbonitrile in the presence of NaN3 with metal salts under hydrothermal conditions. Except of the MnII complex, which has a mononuclear structure being similar to the title compound, all of other complexes have an extended structure, tow- or three-dimensional. And, the ligands coordinate to metal atoms adopting several modes.
The title complex, Cu(C5H3N6)2(H2O)2 (I) performs a mono-nuclear structure, being similar to that of Mn(II) analog. However, in the crystallographic asymmetric unit, there exist two symmetry-independent but structural similar mononuclear molecules, both of which occupies a special position with CuII atoms being on an inversion center (Fig. 1). Two CuII centers have a highly distorted octahedral coordination geometry formed by two trans water molecules and two chelating ligand moieties. Table 1 lists the related bond parameters. Furthermore, such molecules are assembled by the intermolecular O—H···N hydrogen bonds to form a two-dimensional network (Fig. 2 and Table 2).
For related literature, see: Liu & Fan (2007); Rodríguez et al. (2005, 2007); Rodríguez & Colacio (2006); Zhang et al. (2007).
Data collection: SMART (Bruker, 1998); cell refinement: SMART (Bruker, 1998); data reduction: SHELXTL (Bruker, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1998); software used to prepare material for publication: SHELXTL (Sheldrick, 1997).
Fig. 1. Displacement ellipsoid plot (30% probability) of (I). [Symmetry codes: (A) -x, -y, 1 - z; (B) 1 - x, -y, -z] | |
Fig. 2. Two-dimensional H-bonded network in (I). |
[Cu(C5H3N6)2(H2O)2] | Z = 2 |
Mr = 393.84 | F(000) = 398 |
Triclinic, P1 | Dx = 1.747 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.329 (2) Å | Cell parameters from 5023 reflections |
b = 8.107 (2) Å | θ = 3.1–27.5° |
c = 12.926 (3) Å | µ = 1.50 mm−1 |
α = 86.68 (3)° | T = 293 K |
β = 89.84 (3)° | Block, blue |
γ = 77.49 (3)° | 0.40 × 0.30 × 0.28 mm |
V = 748.5 (3) Å3 |
Bruker SMART CCD area-detector diffractometer | 3433 independent reflections |
Radiation source: fine-focus sealed tube | 2314 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.043 |
φ and ω scans | θmax = 27.5°, θmin = 3.1° |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | h = −9→9 |
Tmin = 0.956, Tmax = 1.000 | k = −10→10 |
7532 measured reflections | l = −16→16 |
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)] = 0.038 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.105 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0465P)2 + 0.1285P] where P = (Fo2 + 2Fc2)/3 |
3433 reflections | (Δ/σ)max < 0.001 |
241 parameters | Δρmax = 0.66 e Å−3 |
4 restraints | Δρmin = −0.39 e Å−3 |
[Cu(C5H3N6)2(H2O)2] | γ = 77.49 (3)° |
Mr = 393.84 | V = 748.5 (3) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.329 (2) Å | Mo Kα radiation |
b = 8.107 (2) Å | µ = 1.50 mm−1 |
c = 12.926 (3) Å | T = 293 K |
α = 86.68 (3)° | 0.40 × 0.30 × 0.28 mm |
β = 89.84 (3)° |
Bruker SMART CCD area-detector diffractometer | 3433 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | 2314 reflections with I > 2σ(I) |
Tmin = 0.956, Tmax = 1.000 | Rint = 0.043 |
7532 measured reflections |
R[F2 > 2σ(F2)] = 0.038 | 4 restraints |
wR(F2) = 0.105 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.66 e Å−3 |
3433 reflections | Δρmin = −0.39 e Å−3 |
241 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 | ||
Cu1 | 0.0000 | 0.0000 | 0.5000 | 0.02640 (15) | |
Cu2 | 0.5000 | 0.0000 | 0.0000 | 0.02917 (16) | |
N1 | 0.2252 (3) | −0.0382 (3) | 0.41247 (18) | 0.0262 (5) | |
N2 | 0.3163 (3) | −0.1505 (3) | 0.3476 (2) | 0.0314 (6) | |
N3 | 0.4635 (3) | −0.0956 (4) | 0.3140 (2) | 0.0341 (6) | |
N4 | 0.4700 (3) | 0.0523 (3) | 0.35479 (19) | 0.0305 (6) | |
N5 | 0.1078 (3) | 0.2025 (3) | 0.53878 (18) | 0.0253 (5) | |
N6 | 0.3470 (3) | 0.3472 (3) | 0.4879 (2) | 0.0341 (6) | |
N7 | 0.2673 (3) | −0.0184 (3) | 0.07146 (19) | 0.0314 (6) | |
N8 | 0.1525 (4) | −0.1263 (4) | 0.0808 (2) | 0.0406 (7) | |
N9 | 0.0165 (4) | −0.0616 (4) | 0.1429 (2) | 0.0442 (8) | |
N10 | 0.0406 (3) | 0.0868 (4) | 0.1760 (2) | 0.0389 (7) | |
N11 | 0.4647 (3) | 0.2093 (3) | 0.08732 (19) | 0.0319 (6) | |
N12 | 0.2438 (4) | 0.3698 (4) | 0.1982 (2) | 0.0470 (8) | |
C1 | 0.3220 (4) | 0.0848 (4) | 0.4138 (2) | 0.0253 (6) | |
C2 | 0.2579 (4) | 0.2218 (4) | 0.4829 (2) | 0.0252 (6) | |
C3 | 0.2810 (4) | 0.4591 (4) | 0.5590 (3) | 0.0392 (8) | |
H3A | 0.3380 | 0.5500 | 0.5653 | 0.047* | |
C4 | 0.1354 (4) | 0.4464 (4) | 0.6222 (3) | 0.0367 (8) | |
H4A | 0.0959 | 0.5240 | 0.6722 | 0.044* | |
C5 | 0.0488 (4) | 0.3144 (4) | 0.6093 (2) | 0.0324 (7) | |
H5A | −0.0526 | 0.3034 | 0.6505 | 0.039* | |
C6 | 0.1972 (4) | 0.1096 (4) | 0.1310 (2) | 0.0311 (7) | |
C7 | 0.3035 (4) | 0.2396 (4) | 0.1399 (2) | 0.0327 (7) | |
C8 | 0.3586 (6) | 0.4771 (5) | 0.2042 (3) | 0.0583 (11) | |
H8A | 0.3225 | 0.5700 | 0.2443 | 0.070* | |
C9 | 0.5271 (6) | 0.4569 (5) | 0.1540 (3) | 0.0535 (10) | |
H9A | 0.6044 | 0.5330 | 0.1595 | 0.064* | |
C10 | 0.5751 (5) | 0.3182 (4) | 0.0952 (3) | 0.0402 (8) | |
H10A | 0.6880 | 0.3002 | 0.0601 | 0.048* | |
O1W | −0.1759 (3) | 0.1664 (3) | 0.35881 (17) | 0.0339 (5) | |
H1WA | −0.279 (3) | 0.139 (5) | 0.349 (3) | 0.051* | |
H1WB | −0.116 (4) | 0.150 (5) | 0.3033 (16) | 0.051* | |
O2W | 0.6811 (3) | −0.1811 (3) | 0.13454 (17) | 0.0390 (6) | |
H2WA | 0.780 (3) | −0.146 (5) | 0.145 (3) | 0.059* | |
H2WB | 0.631 (5) | −0.172 (5) | 0.1934 (15) | 0.059* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.0222 (2) | 0.0284 (3) | 0.0324 (3) | −0.0114 (2) | 0.0131 (2) | −0.0119 (2) |
Cu2 | 0.0255 (3) | 0.0347 (3) | 0.0317 (3) | −0.0132 (2) | 0.0132 (2) | −0.0133 (2) |
N1 | 0.0231 (11) | 0.0306 (14) | 0.0267 (12) | −0.0076 (10) | 0.0067 (10) | −0.0088 (11) |
N2 | 0.0269 (12) | 0.0342 (15) | 0.0335 (14) | −0.0056 (11) | 0.0080 (11) | −0.0093 (12) |
N3 | 0.0247 (12) | 0.0449 (17) | 0.0318 (14) | −0.0045 (11) | 0.0080 (11) | −0.0075 (13) |
N4 | 0.0250 (12) | 0.0383 (16) | 0.0303 (14) | −0.0109 (11) | 0.0072 (10) | −0.0029 (12) |
N5 | 0.0229 (11) | 0.0243 (13) | 0.0299 (13) | −0.0075 (10) | 0.0058 (10) | −0.0029 (11) |
N6 | 0.0310 (13) | 0.0355 (15) | 0.0400 (15) | −0.0161 (11) | 0.0054 (11) | −0.0043 (13) |
N7 | 0.0255 (12) | 0.0422 (16) | 0.0277 (13) | −0.0093 (11) | 0.0082 (11) | −0.0059 (12) |
N8 | 0.0333 (14) | 0.055 (2) | 0.0373 (16) | −0.0170 (13) | 0.0068 (12) | −0.0088 (14) |
N9 | 0.0272 (13) | 0.071 (2) | 0.0380 (16) | −0.0179 (14) | 0.0090 (12) | −0.0018 (16) |
N10 | 0.0289 (13) | 0.055 (2) | 0.0331 (15) | −0.0086 (13) | 0.0107 (11) | −0.0049 (14) |
N11 | 0.0317 (13) | 0.0349 (15) | 0.0307 (14) | −0.0089 (11) | 0.0065 (11) | −0.0082 (12) |
N12 | 0.0540 (18) | 0.0377 (18) | 0.0479 (18) | −0.0039 (14) | 0.0142 (15) | −0.0146 (15) |
C1 | 0.0216 (13) | 0.0310 (16) | 0.0246 (14) | −0.0092 (12) | 0.0035 (11) | −0.0003 (12) |
C2 | 0.0207 (12) | 0.0277 (15) | 0.0287 (15) | −0.0086 (11) | 0.0021 (11) | −0.0006 (12) |
C3 | 0.0395 (17) | 0.0319 (18) | 0.052 (2) | −0.0191 (14) | 0.0014 (16) | −0.0077 (16) |
C4 | 0.0395 (17) | 0.0320 (18) | 0.0411 (19) | −0.0107 (14) | 0.0060 (15) | −0.0124 (15) |
C5 | 0.0320 (15) | 0.0313 (17) | 0.0364 (17) | −0.0097 (13) | 0.0092 (13) | −0.0126 (15) |
C6 | 0.0247 (14) | 0.0409 (19) | 0.0256 (15) | −0.0027 (13) | 0.0055 (12) | −0.0003 (14) |
C7 | 0.0345 (16) | 0.0343 (18) | 0.0265 (15) | −0.0013 (13) | 0.0031 (13) | −0.0022 (14) |
C8 | 0.077 (3) | 0.038 (2) | 0.058 (3) | −0.006 (2) | 0.014 (2) | −0.022 (2) |
C9 | 0.069 (3) | 0.042 (2) | 0.056 (2) | −0.0211 (19) | 0.006 (2) | −0.0161 (19) |
C10 | 0.0427 (18) | 0.039 (2) | 0.0428 (19) | −0.0169 (16) | 0.0047 (15) | −0.0087 (16) |
O1W | 0.0297 (11) | 0.0397 (13) | 0.0347 (13) | −0.0116 (10) | 0.0073 (10) | −0.0071 (11) |
O2W | 0.0337 (12) | 0.0525 (15) | 0.0354 (13) | −0.0177 (11) | 0.0086 (10) | −0.0097 (12) |
Cu1—N1 | 1.977 (2) | N8—N9 | 1.316 (4) |
Cu1—N5 | 2.057 (2) | N9—N10 | 1.347 (4) |
Cu1—O1W | 2.406 (2) | N10—C6 | 1.328 (4) |
Cu2—N7 | 1.967 (2) | N11—C10 | 1.328 (4) |
Cu2—N11 | 2.062 (2) | N11—C7 | 1.345 (4) |
Cu2—O2W | 2.411 (3) | N12—C7 | 1.329 (4) |
Cu1—N1i | 1.977 (2) | N12—C8 | 1.340 (5) |
Cu1—N5i | 2.057 (2) | C1—C2 | 1.463 (4) |
Cu1—O1Wi | 2.406 (2) | C3—C4 | 1.360 (4) |
Cu2—N7ii | 1.967 (2) | C3—H3A | 0.9300 |
Cu2—N11ii | 2.062 (2) | C4—C5 | 1.375 (4) |
Cu2—O2Wii | 2.411 (3) | C4—H4A | 0.9300 |
N1—N2 | 1.342 (3) | C5—H5A | 0.9300 |
N1—C1 | 1.344 (4) | C6—C7 | 1.449 (4) |
N2—N3 | 1.317 (3) | C8—C9 | 1.376 (5) |
N3—N4 | 1.348 (3) | C8—H8A | 0.9300 |
N4—C1 | 1.313 (3) | C9—C10 | 1.375 (4) |
N5—C5 | 1.328 (3) | C9—H9A | 0.9300 |
N5—C2 | 1.346 (3) | C10—H10A | 0.9300 |
N6—C2 | 1.326 (4) | O1W—H1WA | 0.842 (10) |
N6—C3 | 1.343 (4) | O1W—H1WB | 0.841 (10) |
N7—N8 | 1.339 (4) | O2W—H2WA | 0.847 (10) |
N7—C6 | 1.339 (4) | O2W—H2WB | 0.845 (10) |
N1—Cu1—N1i | 180.0 | N9—N8—N7 | 107.5 (3) |
N1—Cu1—N5i | 99.14 (9) | N8—N9—N10 | 110.7 (3) |
N1—Cu1—N5 | 80.86 (9) | C6—N10—N9 | 104.5 (3) |
N1—Cu1—O1W | 89.66 (9) | C10—N11—C7 | 117.2 (3) |
N1i—Cu1—O1W | 90.34 (9) | C10—N11—Cu2 | 129.0 (2) |
N5i—Cu1—N5 | 180.00 (6) | C7—N11—Cu2 | 113.8 (2) |
N5i—Cu1—O1W | 89.00 (9) | C7—N12—C8 | 115.4 (3) |
N5—Cu1—O1W | 91.00 (9) | N4—C1—N1 | 111.4 (3) |
O1Wi—Cu1—O1W | 180.00 (7) | N4—C1—C2 | 130.8 (3) |
N1i—Cu1—N5i | 80.86 (9) | N1—C1—C2 | 117.7 (2) |
N1i—Cu1—N5 | 99.14 (9) | N6—C2—N5 | 126.1 (3) |
N1—Cu1—O1Wi | 90.34 (9) | N6—C2—C1 | 120.7 (3) |
N1i—Cu1—O1Wi | 89.66 (9) | N5—C2—C1 | 113.1 (2) |
N5i—Cu1—O1Wi | 91.00 (9) | N6—C3—C4 | 123.5 (3) |
N5—Cu1—O1Wi | 89.00 (9) | N6—C3—H3A | 118.3 |
N7—Cu2—N7ii | 180.0 (2) | C4—C3—H3A | 118.3 |
N7—Cu2—N11 | 80.25 (10) | C3—C4—C5 | 117.4 (3) |
N7ii—Cu2—N11 | 99.75 (10) | C3—C4—H4A | 121.3 |
N7—Cu2—O2Wii | 89.55 (9) | C5—C4—H4A | 121.3 |
N7—Cu2—O2W | 90.45 (9) | N5—C5—C4 | 121.0 (3) |
N11—Cu2—O2W | 92.58 (9) | N5—C5—H5A | 119.5 |
N11—Cu2—O2Wii | 87.42 (9) | C4—C5—H5A | 119.5 |
N11—Cu2—N11ii | 180.00 (12) | N10—C6—N7 | 110.8 (3) |
O2Wii—Cu2—O2W | 180.00 (19) | N10—C6—C7 | 131.7 (3) |
N7—Cu2—N11ii | 99.75 (10) | N7—C6—C7 | 117.4 (3) |
N7ii—Cu2—N11ii | 80.25 (10) | N12—C7—N11 | 125.8 (3) |
N7ii—Cu2—O2Wii | 90.45 (9) | N12—C7—C6 | 121.0 (3) |
N11ii—Cu2—O2Wii | 92.58 (9) | N11—C7—C6 | 113.2 (3) |
N7ii—Cu2—O2W | 89.55 (9) | N12—C8—C9 | 123.4 (3) |
N11ii—Cu2—O2W | 87.42 (9) | N12—C8—H8A | 118.3 |
N2—N1—C1 | 105.9 (2) | C9—C8—H8A | 118.3 |
N2—N1—Cu1 | 140.0 (2) | C10—C9—C8 | 116.5 (3) |
C1—N1—Cu1 | 114.09 (18) | C10—C9—H9A | 121.7 |
N3—N2—N1 | 107.4 (2) | C8—C9—H9A | 121.7 |
N2—N3—N4 | 110.7 (2) | N11—C10—C9 | 121.8 (3) |
C1—N4—N3 | 104.6 (2) | N11—C10—H10A | 119.1 |
C5—N5—C2 | 117.2 (2) | C9—C10—H10A | 119.1 |
C5—N5—Cu1 | 129.0 (2) | Cu1—O1W—H1WA | 112 (3) |
C2—N5—Cu1 | 113.81 (18) | Cu1—O1W—H1WB | 110 (3) |
C2—N6—C3 | 114.8 (3) | H1WA—O1W—H1WB | 106 (3) |
N8—N7—C6 | 106.5 (2) | Cu2—O2W—H2WA | 109 (3) |
N8—N7—Cu2 | 138.6 (2) | Cu2—O2W—H2WB | 113 (3) |
C6—N7—Cu2 | 114.9 (2) | H2WA—O2W—H2WB | 102 (4) |
N5i—Cu1—N1—N2 | −3.7 (3) | N2—N1—C1—N4 | −1.3 (3) |
N5—Cu1—N1—N2 | 176.3 (3) | Cu1—N1—C1—N4 | 179.71 (19) |
O1Wi—Cu1—N1—N2 | 87.4 (3) | N2—N1—C1—C2 | −177.1 (2) |
O1W—Cu1—N1—N2 | −92.6 (3) | Cu1—N1—C1—C2 | 3.9 (3) |
N5i—Cu1—N1—C1 | 174.8 (2) | C3—N6—C2—N5 | 2.6 (5) |
N5—Cu1—N1—C1 | −5.2 (2) | C3—N6—C2—C1 | −176.1 (3) |
O1Wi—Cu1—N1—C1 | −94.1 (2) | C5—N5—C2—N6 | −3.7 (5) |
O1W—Cu1—N1—C1 | 85.9 (2) | Cu1—N5—C2—N6 | 175.8 (2) |
C1—N1—N2—N3 | 1.1 (3) | C5—N5—C2—C1 | 175.1 (3) |
Cu1—N1—N2—N3 | 179.7 (2) | Cu1—N5—C2—C1 | −5.5 (3) |
N1—N2—N3—N4 | −0.6 (3) | N4—C1—C2—N6 | 5.2 (5) |
N2—N3—N4—C1 | −0.1 (3) | N1—C1—C2—N6 | −179.9 (3) |
N1i—Cu1—N5—C5 | 5.3 (3) | N4—C1—C2—N5 | −173.7 (3) |
O1Wi—Cu1—N5—C5 | −84.2 (3) | N1—C1—C2—N5 | 1.2 (4) |
O1W—Cu1—N5—C5 | 95.8 (3) | C2—N6—C3—C4 | 0.5 (5) |
N1—Cu1—N5—C2 | 6.0 (2) | N6—C3—C4—C5 | −2.2 (5) |
N1i—Cu1—N5—C2 | −174.0 (2) | C2—N5—C5—C4 | 1.6 (4) |
O1Wi—Cu1—N5—C2 | 96.5 (2) | Cu1—N5—C5—C4 | −177.7 (2) |
O1W—Cu1—N5—C2 | −83.5 (2) | C3—C4—C5—N5 | 1.1 (5) |
N11—Cu2—N7—N8 | −174.2 (3) | N9—N10—C6—N7 | 0.6 (4) |
N11ii—Cu2—N7—N8 | 5.8 (3) | N9—N10—C6—C7 | −175.9 (3) |
O2Wii—Cu2—N7—N8 | 98.3 (3) | N8—N7—C6—N10 | −1.0 (4) |
O2W—Cu2—N7—N8 | −81.7 (3) | Cu2—N7—C6—N10 | 179.9 (2) |
N11—Cu2—N7—C6 | 4.4 (2) | N8—N7—C6—C7 | 176.0 (3) |
N11ii—Cu2—N7—C6 | −175.6 (2) | Cu2—N7—C6—C7 | −3.0 (4) |
O2Wii—Cu2—N7—C6 | −83.0 (2) | C8—N12—C7—N11 | −0.7 (5) |
O2W—Cu2—N7—C6 | 97.0 (2) | C8—N12—C7—C6 | 176.9 (3) |
C6—N7—N8—N9 | 1.1 (4) | C10—N11—C7—N12 | 0.8 (5) |
Cu2—N7—N8—N9 | 179.8 (2) | Cu2—N11—C7—N12 | −177.1 (3) |
N7—N8—N9—N10 | −0.7 (4) | C10—N11—C7—C6 | −176.9 (3) |
N8—N9—N10—C6 | 0.1 (4) | Cu2—N11—C7—C6 | 5.2 (3) |
N7—Cu2—N11—C10 | 177.1 (3) | N10—C6—C7—N12 | −3.1 (6) |
N7ii—Cu2—N11—C10 | −2.9 (3) | N7—C6—C7—N12 | −179.5 (3) |
O2Wii—Cu2—N11—C10 | −92.9 (3) | N10—C6—C7—N11 | 174.7 (3) |
O2W—Cu2—N11—C10 | 87.1 (3) | N7—C6—C7—N11 | −1.6 (4) |
N7—Cu2—N11—C7 | −5.4 (2) | C7—N12—C8—C9 | 0.2 (6) |
N7ii—Cu2—N11—C7 | 174.6 (2) | N12—C8—C9—C10 | 0.2 (6) |
O2Wii—Cu2—N11—C7 | 84.6 (2) | C7—N11—C10—C9 | −0.4 (5) |
O2W—Cu2—N11—C7 | −95.4 (2) | Cu2—N11—C10—C9 | 177.1 (3) |
N3—N4—C1—N1 | 0.9 (3) | C8—C9—C10—N11 | 0.0 (6) |
N3—N4—C1—C2 | 176.0 (3) |
Symmetry codes: (i) −x, −y, −z+1; (ii) −x+1, −y, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1WA···N4iii | 0.84 (1) | 2.11 (1) | 2.939 (3) | 169 (4) |
O1W—H1WB···N10 | 0.84 (1) | 2.03 (1) | 2.869 (3) | 174 (4) |
O2W—H2WB···N3 | 0.85 (1) | 2.02 (2) | 2.845 (3) | 164 (4) |
O2W—H2WA···N9iv | 0.85 (1) | 2.00 (1) | 2.835 (3) | 170 (4) |
Symmetry codes: (iii) x−1, y, z; (iv) x+1, y, z. |
Experimental details
Crystal data | |
Chemical formula | [Cu(C5H3N6)2(H2O)2] |
Mr | 393.84 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 7.329 (2), 8.107 (2), 12.926 (3) |
α, β, γ (°) | 86.68 (3), 89.84 (3), 77.49 (3) |
V (Å3) | 748.5 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 1.50 |
Crystal size (mm) | 0.40 × 0.30 × 0.28 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 1998) |
Tmin, Tmax | 0.956, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7532, 3433, 2314 |
Rint | 0.043 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.105, 1.04 |
No. of reflections | 3433 |
No. of parameters | 241 |
No. of restraints | 4 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.66, −0.39 |
Computer programs: SMART (Bruker, 1998), SHELXTL (Bruker, 1998), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Sheldrick, 1997).
Cu1—N1 | 1.977 (2) | Cu2—N7 | 1.967 (2) |
Cu1—N5 | 2.057 (2) | Cu2—N11 | 2.062 (2) |
Cu1—O1W | 2.406 (2) | Cu2—O2W | 2.411 (3) |
N1—Cu1—N1i | 180.0 | N7—Cu2—N7ii | 180.0 (2) |
N1—Cu1—N5i | 99.14 (9) | N7—Cu2—N11 | 80.25 (10) |
N1—Cu1—N5 | 80.86 (9) | N7ii—Cu2—N11 | 99.75 (10) |
N1—Cu1—O1W | 89.66 (9) | N7—Cu2—O2Wii | 89.55 (9) |
N1i—Cu1—O1W | 90.34 (9) | N7—Cu2—O2W | 90.45 (9) |
N5i—Cu1—N5 | 180.00 (6) | N11—Cu2—O2W | 92.58 (9) |
N5i—Cu1—O1W | 89.00 (9) | N11—Cu2—O2Wii | 87.42 (9) |
N5—Cu1—O1W | 91.00 (9) | N11—Cu2—N11ii | 180.00 (12) |
O1Wi—Cu1—O1W | 180.00 (7) | O2Wii—Cu2—O2W | 180.00 (19) |
Symmetry codes: (i) −x, −y, −z+1; (ii) −x+1, −y, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1WA···N4iii | 0.84 (1) | 2.11 (1) | 2.939 (3) | 169 (4) |
O1W—H1WB···N10 | 0.84 (1) | 2.03 (1) | 2.869 (3) | 174 (4) |
O2W—H2WB···N3 | 0.85 (1) | 2.02 (2) | 2.845 (3) | 164 (4) |
O2W—H2WA···N9iv | 0.85 (1) | 2.00 (1) | 2.835 (3) | 170 (4) |
Symmetry codes: (iii) x−1, y, z; (iv) x+1, y, z. |
The crystal structures of NaII, MnII, FeII, CoII, NiII and Zn(II) complexes with 5-(pyrimidin-2-yl)tetrazolate group have been reported recently (Liu & Fan, 2007; Rodríguez et al., 2005, 2007; Rodríguez & Colacio (2006); Zhang et al., 2007). Such complexes were obtained by either the direction reaction of the ligand, 2-(1H-tetrazol-5-yl)pyrimidine or the in situ reaction from pyrimidine-2-carbonitrile in the presence of NaN3 with metal salts under hydrothermal conditions. Except of the MnII complex, which has a mononuclear structure being similar to the title compound, all of other complexes have an extended structure, tow- or three-dimensional. And, the ligands coordinate to metal atoms adopting several modes.
The title complex, Cu(C5H3N6)2(H2O)2 (I) performs a mono-nuclear structure, being similar to that of Mn(II) analog. However, in the crystallographic asymmetric unit, there exist two symmetry-independent but structural similar mononuclear molecules, both of which occupies a special position with CuII atoms being on an inversion center (Fig. 1). Two CuII centers have a highly distorted octahedral coordination geometry formed by two trans water molecules and two chelating ligand moieties. Table 1 lists the related bond parameters. Furthermore, such molecules are assembled by the intermolecular O—H···N hydrogen bonds to form a two-dimensional network (Fig. 2 and Table 2).