metal-organic compounds
(Dicyanamido)[2-(2-pyridylmethyliminomethyl)phenolato]copper(II) monohydrate
aSchool of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan University, Kunming 650091, People's Republic of China
*Correspondence e-mail: qhzhao@ynu.edu.cn
The title compound, [Cu(C13H11N2O)(C2N3)]·H2O, is a mononuclear copper(II) complex in which the CuII ion has a slightly distorted square-planar geometry and is coordinated by two N atoms and one O atom from the Schiff base ligand and by an N atom from dicyanamide. The O atoms of water molecules contribute to O—H⋯N, O—H⋯O hydrogen bonds, leading to the formation of sheets parallel to the ac plane. There are also weak interactions between inversion-related molecules.
Related literature
For related literature, see: You & Zhu (2004); Li & Zhang (2004); You et al. (2004); Zhang et al. (2005).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku, 2005); cell CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Sheldrick, 1999); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536807057169/pk2057sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536807057169/pk2057Isup2.hkl
All chemicals used (reagent grade) were commercially available. Salicylaldehyde (0.122 g, 1 mmol) was dissolved in ethanol (5 mL) and ethanol solution (5 mL) containing 2-aminomethylpyridine (0.108 g, 1 mmol) was added slowly with stirring. The resulting yellow solution was continuously stirred for about 30 min at room temperature, and then Cu(CH3COO)2.H2O (0.200 g, 1 mmol) in aqueous solution (5 mL) was added with stirring homogeneously. Dark blue crystals suitable for X-ray ananlysis were obtained by slow evaporation at room temperature over several days (Zhang et al., 2005).
Water H atoms were located in a difference map and refined with distance restraints of O1W—H = 0.87 (2). Other H atoms were placed in calculated positions and allowed to ride on their attached C atoms with Uiso(H) = 1.2Ueq(C).
Transition metal compounds containing Schiff base ligands have been of great interest for many years. These compounds play an important role in the development of coordination chemistry due to their potential applications in catalysis and enzymatic reactions, magnetism and molecular architecture (You & Zhu, 2004; Li & Zhang, 2004). Here we report the structure of a complex that is formed by Cu(CH3COO)2, the Schiff base ligand 2-(pyridin-2-ylmethyliminomethyl)phenol and sodium dicyanamide.
As shown in Fig. 1, the
consists of a mononuclear [Cu(C13H11N2O)N(CN)2] and a H-bonded water molecule. The central CuII ion is four-coordinate and adopts a slightly distorted square-planar geometry that is defined by two N atoms and one O atom from the Schiff base ligand and another N atom from dicyanamide. The C7=N1 and C8—N1 distances of 1.293 (4) Å and 1.466 (4) Å indicate double and single bonds respectively. The bond angles around the CuII centre show some deviations from ideal square-planar geometry (You et al., 2004). Also, the closeness of the planes of inversion related molecules imply weak intramolecular interactions cross an inversion centre such that the distance between Cu1 and O1 of an inversion related phenolato is 2.814 (2) Å, which is much longer than Cu—O bond length.The water molecule is involved in intermolecular (O1W—H1WA···N5) and intramolecular hydrogen bonds (O1W—H1WB···O1, O1W—H1WB···N3), which leads to sheets parallel to the ac plane (Fig. 2).
For related literature, see: You & Zhu (2004); Li & Zhang (2004); You et al. (2004); Zhang et al. (2005).
Data collection: CrystalClear (Rigaku, 2005); cell
CrystalClear (Rigaku, 2005); data reduction: CrystalClear (Rigaku, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Sheldrick, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 1999).[Cu(C13H11N2O)(C2N3)]·H2O | F(000) = 732 |
Mr = 358.84 | Dx = 1.622 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3146 reflections |
a = 9.8851 (12) Å | θ = 3.0–27.5° |
b = 7.0240 (6) Å | µ = 1.50 mm−1 |
c = 21.398 (3) Å | T = 293 K |
β = 98.382 (9)° | Prism, colourless |
V = 1469.9 (3) Å3 | 0.2 × 0.2 × 0.2 mm |
Z = 4 |
Rigaku Mercury2 CCD diffractometer | 3487 independent reflections |
Radiation source: fine-focus sealed tube | 2664 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.048 |
Detector resolution: 13.6612 pixels mm-1 | θmax = 27.9°, θmin = 2.6° |
ω scans | h = −13→13 |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | k = −9→9 |
Tmin = 0.693, Tmax = 0.741 | l = −28→28 |
14839 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)] = 0.042 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0583P)2 + 0.2406P] where P = (Fo2 + 2Fc2)/3 |
3487 reflections | (Δ/σ)max = 0.001 |
208 parameters | Δρmax = 0.61 e Å−3 |
0 restraints | Δρmin = −0.35 e Å−3 |
[Cu(C13H11N2O)(C2N3)]·H2O | V = 1469.9 (3) Å3 |
Mr = 358.84 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 9.8851 (12) Å | µ = 1.50 mm−1 |
b = 7.0240 (6) Å | T = 293 K |
c = 21.398 (3) Å | 0.2 × 0.2 × 0.2 mm |
β = 98.382 (9)° |
Rigaku Mercury2 CCD diffractometer | 3487 independent reflections |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | 2664 reflections with I > 2σ(I) |
Tmin = 0.693, Tmax = 0.741 | Rint = 0.048 |
14839 measured reflections |
R[F2 > 2σ(F2)] = 0.042 | 0 restraints |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.61 e Å−3 |
3487 reflections | Δρmin = −0.35 e Å−3 |
208 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 > 2σ(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 | 0.56134 (3) | 0.30788 (5) | 0.548195 (15) | 0.04185 (13) | |
O1 | 0.42489 (19) | 0.2985 (3) | 0.47469 (10) | 0.0489 (5) | |
N2 | 0.7131 (2) | 0.3036 (3) | 0.62161 (11) | 0.0411 (5) | |
N1 | 0.6994 (2) | 0.1915 (3) | 0.50553 (12) | 0.0463 (6) | |
C1 | 0.4349 (3) | 0.2127 (4) | 0.41987 (14) | 0.0439 (6) | |
N3 | 0.4226 (2) | 0.3912 (4) | 0.59818 (11) | 0.0477 (5) | |
O1W | 0.1486 (2) | 0.3114 (5) | 0.50627 (14) | 0.0968 (11) | |
H1WA | 0.0984 | 0.3091 | 0.4690 | 0.116* | |
H1WB | 0.2322 | 0.3266 | 0.4974 | 0.116* | |
C10 | 0.7040 (3) | 0.3557 (4) | 0.68161 (15) | 0.0508 (7) | |
H10A | 0.6219 | 0.4051 | 0.6908 | 0.061* | |
C7 | 0.6801 (3) | 0.1162 (4) | 0.44982 (13) | 0.0454 (6) | |
H7A | 0.7536 | 0.0521 | 0.4370 | 0.055* | |
C6 | 0.3203 (3) | 0.2118 (4) | 0.37236 (14) | 0.0501 (7) | |
H6A | 0.2384 | 0.2647 | 0.3805 | 0.060* | |
N4 | 0.2314 (2) | 0.4829 (5) | 0.65140 (12) | 0.0617 (7) | |
C14 | 0.3289 (3) | 0.4396 (4) | 0.62031 (12) | 0.0436 (6) | |
C3 | 0.5580 (3) | 0.0428 (4) | 0.34622 (14) | 0.0525 (7) | |
H3A | 0.6374 | −0.0163 | 0.3377 | 0.063* | |
C8 | 0.8366 (3) | 0.1772 (5) | 0.54199 (15) | 0.0582 (8) | |
H8A | 0.8986 | 0.2615 | 0.5242 | 0.070* | |
H8B | 0.8704 | 0.0480 | 0.5400 | 0.070* | |
C13 | 0.9430 (3) | 0.2075 (5) | 0.65564 (17) | 0.0584 (8) | |
H13A | 1.0241 | 0.1562 | 0.6460 | 0.070* | |
C2 | 0.5558 (3) | 0.1225 (4) | 0.40608 (13) | 0.0441 (6) | |
C11 | 0.8115 (4) | 0.3384 (5) | 0.72932 (16) | 0.0616 (8) | |
H11A | 0.8030 | 0.3780 | 0.7700 | 0.074* | |
C4 | 0.4466 (3) | 0.0493 (5) | 0.29979 (15) | 0.0594 (8) | |
H4B | 0.4506 | −0.0014 | 0.2600 | 0.071* | |
C9 | 0.8314 (3) | 0.2302 (4) | 0.60885 (14) | 0.0456 (6) | |
C12 | 0.9325 (3) | 0.2615 (5) | 0.71624 (18) | 0.0652 (9) | |
H12A | 1.0062 | 0.2464 | 0.7482 | 0.078* | |
C5 | 0.3281 (3) | 0.1335 (4) | 0.31392 (15) | 0.0549 (8) | |
H5A | 0.2514 | 0.1373 | 0.2831 | 0.066* | |
C15 | 0.1320 (3) | 0.5962 (5) | 0.62805 (14) | 0.0545 (7) | |
N5 | 0.0420 (3) | 0.6967 (5) | 0.61320 (16) | 0.0770 (9) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.03160 (19) | 0.0507 (2) | 0.0433 (2) | 0.00257 (13) | 0.00549 (13) | 0.00151 (14) |
O1 | 0.0344 (10) | 0.0648 (13) | 0.0469 (11) | 0.0028 (8) | 0.0043 (8) | −0.0062 (9) |
N2 | 0.0357 (11) | 0.0430 (12) | 0.0442 (13) | 0.0004 (9) | 0.0047 (9) | 0.0042 (9) |
N1 | 0.0312 (11) | 0.0562 (14) | 0.0521 (14) | −0.0002 (9) | 0.0083 (10) | 0.0005 (11) |
C1 | 0.0412 (14) | 0.0423 (15) | 0.0486 (17) | −0.0065 (11) | 0.0073 (11) | 0.0018 (12) |
N3 | 0.0408 (12) | 0.0539 (14) | 0.0489 (14) | 0.0061 (11) | 0.0080 (10) | 0.0039 (11) |
O1W | 0.0436 (13) | 0.174 (3) | 0.0718 (18) | −0.0051 (16) | 0.0055 (12) | −0.0185 (18) |
C10 | 0.0467 (16) | 0.0547 (16) | 0.0497 (17) | 0.0006 (13) | 0.0028 (13) | 0.0026 (13) |
C7 | 0.0406 (14) | 0.0480 (15) | 0.0501 (17) | 0.0011 (12) | 0.0145 (12) | 0.0022 (13) |
C6 | 0.0427 (15) | 0.0533 (17) | 0.0525 (18) | −0.0056 (12) | 0.0004 (12) | −0.0015 (13) |
N4 | 0.0453 (14) | 0.096 (2) | 0.0449 (14) | 0.0191 (14) | 0.0118 (11) | 0.0100 (14) |
C14 | 0.0391 (14) | 0.0506 (15) | 0.0396 (14) | 0.0007 (11) | 0.0008 (11) | 0.0042 (12) |
C3 | 0.0577 (17) | 0.0534 (17) | 0.0491 (17) | −0.0048 (13) | 0.0165 (14) | 0.0012 (13) |
C8 | 0.0320 (14) | 0.082 (2) | 0.061 (2) | 0.0052 (14) | 0.0089 (13) | −0.0044 (16) |
C13 | 0.0336 (15) | 0.069 (2) | 0.070 (2) | 0.0030 (13) | −0.0012 (13) | −0.0001 (17) |
C2 | 0.0431 (14) | 0.0453 (14) | 0.0448 (16) | −0.0048 (11) | 0.0099 (11) | 0.0029 (12) |
C11 | 0.065 (2) | 0.068 (2) | 0.0484 (18) | −0.0034 (16) | −0.0009 (15) | −0.0006 (15) |
C4 | 0.073 (2) | 0.0593 (19) | 0.0467 (18) | −0.0120 (16) | 0.0101 (15) | −0.0048 (14) |
C9 | 0.0321 (13) | 0.0475 (15) | 0.0569 (17) | −0.0037 (11) | 0.0056 (11) | 0.0026 (13) |
C12 | 0.0453 (18) | 0.073 (2) | 0.071 (2) | −0.0014 (16) | −0.0122 (15) | 0.0050 (18) |
C5 | 0.0582 (18) | 0.0539 (16) | 0.0496 (18) | −0.0096 (14) | −0.0025 (14) | 0.0038 (14) |
C15 | 0.0403 (15) | 0.079 (2) | 0.0451 (16) | 0.0023 (15) | 0.0084 (12) | −0.0045 (15) |
N5 | 0.0517 (17) | 0.104 (3) | 0.074 (2) | 0.0257 (16) | 0.0057 (14) | −0.0008 (17) |
Cu1—O1 | 1.9181 (19) | C6—H6A | 0.9300 |
Cu1—N1 | 1.931 (2) | N4—C14 | 1.284 (4) |
Cu1—N3 | 1.948 (2) | N4—C15 | 1.306 (4) |
Cu1—N2 | 2.008 (2) | C3—C4 | 1.372 (4) |
O1—C1 | 1.335 (4) | C3—C2 | 1.401 (4) |
N2—C9 | 1.342 (4) | C3—H3A | 0.9300 |
N2—C10 | 1.351 (4) | C8—C9 | 1.487 (4) |
N1—C7 | 1.293 (4) | C8—H8A | 0.9700 |
N1—C8 | 1.466 (4) | C8—H8B | 0.9700 |
C1—C6 | 1.407 (4) | C13—C12 | 1.369 (5) |
C1—C2 | 1.421 (4) | C13—C9 | 1.386 (4) |
N3—C14 | 1.152 (3) | C13—H13A | 0.9300 |
O1W—H1WA | 0.8754 | C11—C12 | 1.377 (5) |
O1W—H1WB | 0.8814 | C11—H11A | 0.9300 |
C10—C11 | 1.367 (4) | C4—C5 | 1.384 (4) |
C10—H10A | 0.9300 | C4—H4B | 0.9300 |
C7—C2 | 1.432 (4) | C12—H12A | 0.9300 |
C7—H7A | 0.9300 | C5—H5A | 0.9300 |
C6—C5 | 1.379 (4) | C15—N5 | 1.144 (4) |
O1—Cu1—N1 | 93.37 (9) | C4—C3—H3A | 119.0 |
O1—Cu1—N3 | 89.62 (9) | C2—C3—H3A | 119.0 |
N1—Cu1—N3 | 171.71 (10) | N1—C8—C9 | 109.6 (2) |
O1—Cu1—N2 | 175.47 (9) | N1—C8—H8A | 109.7 |
N1—Cu1—N2 | 82.22 (10) | C9—C8—H8A | 109.7 |
N3—Cu1—N2 | 94.61 (10) | N1—C8—H8B | 109.7 |
C1—O1—Cu1 | 127.05 (18) | C9—C8—H8B | 109.7 |
C9—N2—C10 | 118.6 (2) | H8A—C8—H8B | 108.2 |
C9—N2—Cu1 | 114.9 (2) | C12—C13—C9 | 119.3 (3) |
C10—N2—Cu1 | 126.45 (19) | C12—C13—H13A | 120.3 |
C7—N1—C8 | 117.6 (2) | C9—C13—H13A | 120.3 |
C7—N1—Cu1 | 126.15 (19) | C3—C2—C1 | 119.5 (3) |
C8—N1—Cu1 | 116.1 (2) | C3—C2—C7 | 117.3 (3) |
O1—C1—C6 | 118.8 (3) | C1—C2—C7 | 123.0 (3) |
O1—C1—C2 | 123.8 (3) | C10—C11—C12 | 119.1 (3) |
C6—C1—C2 | 117.4 (3) | C10—C11—H11A | 120.5 |
C14—N3—Cu1 | 170.9 (2) | C12—C11—H11A | 120.5 |
H1WA—O1W—H1WB | 103.3 | C3—C4—C5 | 118.1 (3) |
N2—C10—C11 | 122.3 (3) | C3—C4—H4B | 120.9 |
N2—C10—H10A | 118.9 | C5—C4—H4B | 120.9 |
C11—C10—H10A | 118.9 | N2—C9—C13 | 121.5 (3) |
N1—C7—C2 | 125.9 (3) | N2—C9—C8 | 116.4 (2) |
N1—C7—H7A | 117.0 | C13—C9—C8 | 122.1 (3) |
C2—C7—H7A | 117.0 | C13—C12—C11 | 119.3 (3) |
C5—C6—C1 | 120.8 (3) | C13—C12—H12A | 120.4 |
C5—C6—H6A | 119.6 | C11—C12—H12A | 120.4 |
C1—C6—H6A | 119.6 | C6—C5—C4 | 122.0 (3) |
C14—N4—C15 | 121.7 (3) | C6—C5—H5A | 119.0 |
N3—C14—N4 | 172.7 (3) | C4—C5—H5A | 119.0 |
C4—C3—C2 | 122.1 (3) | N5—C15—N4 | 173.6 (3) |
N1—Cu1—O1—C1 | 7.4 (2) | C4—C3—C2—C7 | −176.8 (3) |
N3—Cu1—O1—C1 | −164.8 (2) | O1—C1—C2—C3 | −177.5 (2) |
N1—Cu1—N2—C9 | 0.57 (19) | C6—C1—C2—C3 | 2.0 (4) |
N3—Cu1—N2—C9 | 172.9 (2) | O1—C1—C2—C7 | −0.6 (4) |
N1—Cu1—N2—C10 | −175.2 (2) | C6—C1—C2—C7 | 178.9 (3) |
N3—Cu1—N2—C10 | −2.9 (2) | N1—C7—C2—C3 | 175.9 (3) |
O1—Cu1—N1—C7 | −8.8 (3) | N1—C7—C2—C1 | −1.1 (5) |
N2—Cu1—N1—C7 | 170.1 (3) | N2—C10—C11—C12 | −1.4 (5) |
O1—Cu1—N1—C8 | 175.4 (2) | C2—C3—C4—C5 | −1.7 (5) |
N2—Cu1—N1—C8 | −5.6 (2) | C10—N2—C9—C13 | −0.1 (4) |
Cu1—O1—C1—C6 | 176.29 (19) | Cu1—N2—C9—C13 | −176.2 (2) |
Cu1—O1—C1—C2 | −4.3 (4) | C10—N2—C9—C8 | −179.3 (3) |
C9—N2—C10—C11 | 0.8 (4) | Cu1—N2—C9—C8 | 4.5 (3) |
Cu1—N2—C10—C11 | 176.5 (2) | C12—C13—C9—N2 | −0.1 (5) |
C8—N1—C7—C2 | −177.1 (3) | C12—C13—C9—C8 | 179.1 (3) |
Cu1—N1—C7—C2 | 7.2 (4) | N1—C8—C9—N2 | −8.7 (4) |
O1—C1—C6—C5 | 176.7 (3) | N1—C8—C9—C13 | 172.0 (3) |
C2—C1—C6—C5 | −2.8 (4) | C9—C13—C12—C11 | −0.4 (5) |
C7—N1—C8—C9 | −167.0 (3) | C10—C11—C12—C13 | 1.2 (5) |
Cu1—N1—C8—C9 | 9.1 (3) | C1—C6—C5—C4 | 1.4 (5) |
C4—C3—C2—C1 | 0.2 (4) | C3—C4—C5—C6 | 0.9 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1WA···N5i | 0.88 | 2.08 | 2.947 (4) | 173 |
O1W—H1WB···O1 | 0.88 | 2.04 | 2.909 (3) | 167 |
O1W—H1WB···N3 | 0.88 | 2.69 | 3.157 (3) | 115 |
Symmetry code: (i) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Cu(C13H11N2O)(C2N3)]·H2O |
Mr | 358.84 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 9.8851 (12), 7.0240 (6), 21.398 (3) |
β (°) | 98.382 (9) |
V (Å3) | 1469.9 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.50 |
Crystal size (mm) | 0.2 × 0.2 × 0.2 |
Data collection | |
Diffractometer | Rigaku Mercury2 CCD |
Absorption correction | Multi-scan (CrystalClear; Rigaku, 2005) |
Tmin, Tmax | 0.693, 0.741 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14839, 3487, 2664 |
Rint | 0.048 |
(sin θ/λ)max (Å−1) | 0.658 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.042, 0.115, 1.04 |
No. of reflections | 3487 |
No. of parameters | 208 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.61, −0.35 |
Computer programs: CrystalClear (Rigaku, 2005), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Sheldrick, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1WA···N5i | 0.88 | 2.08 | 2.947 (4) | 172.6 |
O1W—H1WB···O1 | 0.88 | 2.04 | 2.909 (3) | 167.4 |
O1W—H1WB···N3 | 0.88 | 2.69 | 3.157 (3) | 114.7 |
Symmetry code: (i) −x, −y+1, −z+1. |
Acknowledgements
This work was financially supported by the NNSFC (No. 20361004 and 20561004), the Key Project of the Chinese Ministry of Education (No. 205147), the Specialized Research Fund for the Doctoral Program of Higher Education (No. 2006673015) and the NSF of Yunnan Province (No. 2004E0008M and 2003RC13).
References
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Transition metal compounds containing Schiff base ligands have been of great interest for many years. These compounds play an important role in the development of coordination chemistry due to their potential applications in catalysis and enzymatic reactions, magnetism and molecular architecture (You & Zhu, 2004; Li & Zhang, 2004). Here we report the structure of a complex that is formed by Cu(CH3COO)2, the Schiff base ligand 2-(pyridin-2-ylmethyliminomethyl)phenol and sodium dicyanamide.
As shown in Fig. 1, the asymmetric unit consists of a mononuclear [Cu(C13H11N2O)N(CN)2] and a H-bonded water molecule. The central CuII ion is four-coordinate and adopts a slightly distorted square-planar geometry that is defined by two N atoms and one O atom from the Schiff base ligand and another N atom from dicyanamide. The C7=N1 and C8—N1 distances of 1.293 (4) Å and 1.466 (4) Å indicate double and single bonds respectively. The bond angles around the CuII centre show some deviations from ideal square-planar geometry (You et al., 2004). Also, the closeness of the planes of inversion related molecules imply weak intramolecular interactions cross an inversion centre such that the distance between Cu1 and O1 of an inversion related phenolato is 2.814 (2) Å, which is much longer than Cu—O bond length.
The water molecule is involved in intermolecular (O1W—H1WA···N5) and intramolecular hydrogen bonds (O1W—H1WB···O1, O1W—H1WB···N3), which leads to sheets parallel to the ac plane (Fig. 2).