metal-organic compounds
Bis(1,5-diphenylcarbazonato)dimethanolcobalt(II)
aQinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, People's Republic of China, and bKey Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, People's Republic of China
*Correspondence e-mail: liyahong@suda.edu.cn
The structure of the title compound, [Co(C13H11N4O)2(CH3OH)2], is a mononuclear six-coordinated octahedral cobalt(II) complex of Ci molecular symmetry. The CoII ion is coordinated by two N atoms and two O atoms from two 1,5-biphenylcarbazide ligands, and two O atoms from two methanol molecules. Two diphenylcarbazidate ligands and the central CoII ion form the basal plane, with the two methanol molecules located in axial positions. The crystal packing is defined by bifurcated O—H⋯N hydrogen bonding and intramolecular N—H⋯O interactions.
Related literature
For the use of biphenylcarbazide for the analytical determination of chromium in biological materials, see: Yarbro & Flaschka (1976). For its coordination modes, see: Feigl (1924); Shafranskii & Mal'kova (1975a,b); Martynova et al. (1985); Turkington & Tracy (1958); Deshpande & Jain (1988). For related literature, see: Pankaj & Chauhan (2004); Sollott & Peterson (1969); Cazeneuve (1900a,b).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2001); 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/S1600536809055305/kp2244sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809055305/kp2244Isup2.hkl
The compound 1 was synthesized by solvothermal reaction. A mixture of diphenylcarbazide (0.0499 g, 0.2 mmol), Co(CH3COO)2.4H2O (0.0245 g, 0.1 mmol) and CH3OH / CH3CN (v / v = 2: 1, 2 ml) was sealed in a 5 ml glass tube and heated to 353 K for 48 h. After cooling to room temperature, purple crystals were obtained.
Methyl H atoms were placed in calculated positions with C—H = 0.96 Å, and torsion angles were refined, Uiso(H) = 1.5 Ueq(C, O). Other H atoms were placed in calculated positions with C—H = 0.93 (aromatic) or 0.803 Å (Imino) and refined in riding mode, with Uiso(H) = 1.2 Ueq(C).
The diphenylcarbazide is often used for analytical determination of chromium in biological materials (Yarbro et al. 1976). As a multidentate ligand, diphenylcarbazide chelates the metal centres by two N atoms (Feigl 1924) or coordinates with the metal ions by O atom in monodentate fashion (Shafranskii et al., 1975a,b; Martynova et al., 1985), whereas the examples of diphenylcarbazide complexes, in which the ligands chelated metal ions bidentately by one O atom and one N atom, were very rare (Turkington et al., 1958; Deshpande et al., 1988). Herein we report the synthesis and
of such diphenylcarbazide coordinated cobalt complex with Co occuping an inversion centre (Fig. 1 and Table 1). The Packing diagram of I viewed down the a axis (Fig. 2) reveals hydrogen bond interactions (Table 2).For the use of iphenylcarbazide for the analytical determination of chromium in biological materials, see: Yarbro et al. (1976). For its coordination modes, see: Feigl (1924); Shafranskii et al. (1975a,b); Martynova et al. (1985); Turkington et al. (1958); Deshpande et al. (1988). For related literature, see: Pankaj et al. (2004); Sollott et al. (1969); Cazeneuve (1900a,b).
Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); 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).[Co(C13H11N4O)2(CH4O)2] | F(000) = 626 |
Mr = 601.53 | Dx = 1.371 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 2392 reflections |
a = 6.492 (2) Å | θ = 2.4–24.6° |
b = 8.926 (3) Å | µ = 0.64 mm−1 |
c = 25.159 (9) Å | T = 296 K |
β = 92.372 (6)° | Block, clear violet |
V = 1456.7 (9) Å3 | 0.35 × 0.28 × 0.27 mm |
Z = 2 |
Bruker SMART CCD area-detector diffractometer | 2564 independent reflections |
Radiation source: fine-focus sealed tube | 2037 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.046 |
phi and ω scans | θmax = 25.0°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | h = −7→7 |
Tmin = 0.808, Tmax = 0.847 | k = −10→10 |
6990 measured reflections | l = −20→29 |
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) = 0.117 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0652P)2 + 0.0401P] where P = (Fo2 + 2Fc2)/3 |
2564 reflections | (Δ/σ)max < 0.001 |
196 parameters | Δρmax = 0.40 e Å−3 |
0 restraints | Δρmin = −0.43 e Å−3 |
[Co(C13H11N4O)2(CH4O)2] | V = 1456.7 (9) Å3 |
Mr = 601.53 | Z = 2 |
Monoclinic, P21/c | Mo Kα radiation |
a = 6.492 (2) Å | µ = 0.64 mm−1 |
b = 8.926 (3) Å | T = 296 K |
c = 25.159 (9) Å | 0.35 × 0.28 × 0.27 mm |
β = 92.372 (6)° |
Bruker SMART CCD area-detector diffractometer | 2564 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 2037 reflections with I > 2σ(I) |
Tmin = 0.808, Tmax = 0.847 | Rint = 0.046 |
6990 measured reflections |
R[F2 > 2σ(F2)] = 0.042 | 0 restraints |
wR(F2) = 0.117 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | Δρmax = 0.40 e Å−3 |
2564 reflections | Δρmin = −0.43 e Å−3 |
196 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 | ||
Co1 | 1.0000 | 1.0000 | 1.0000 | 0.03524 (19) | |
C1 | 0.8530 (5) | 0.7374 (3) | 1.09426 (11) | 0.0528 (7) | |
H1 | 0.9758 | 0.7899 | 1.0914 | 0.063* | |
C2 | 0.8241 (6) | 0.6473 (4) | 1.13836 (11) | 0.0640 (9) | |
H2 | 0.9270 | 0.6404 | 1.1651 | 0.077* | |
C3 | 0.6446 (6) | 0.5688 (4) | 1.14251 (13) | 0.0642 (9) | |
H3 | 0.6256 | 0.5087 | 1.1721 | 0.077* | |
C4 | 0.4933 (5) | 0.5785 (4) | 1.10342 (14) | 0.0720 (10) | |
H4 | 0.3721 | 0.5241 | 1.1064 | 0.086* | |
C5 | 0.5185 (5) | 0.6687 (4) | 1.05925 (13) | 0.0634 (9) | |
H5 | 0.4145 | 0.6753 | 1.0328 | 0.076* | |
C6 | 0.7007 (4) | 0.7492 (3) | 1.05484 (10) | 0.0382 (6) | |
C7 | 0.6545 (4) | 0.9405 (3) | 0.93219 (10) | 0.0367 (6) | |
C8 | 0.4192 (4) | 1.0503 (3) | 0.80937 (10) | 0.0437 (6) | |
C9 | 0.2276 (5) | 0.9825 (3) | 0.80672 (13) | 0.0584 (8) | |
H9 | 0.1907 | 0.9157 | 0.8330 | 0.070* | |
C10 | 0.0906 (6) | 1.0150 (4) | 0.76451 (14) | 0.0710 (10) | |
H10 | −0.0385 | 0.9697 | 0.7627 | 0.085* | |
C11 | 0.1441 (6) | 1.1139 (4) | 0.72520 (13) | 0.0719 (10) | |
H11 | 0.0509 | 1.1361 | 0.6972 | 0.086* | |
C12 | 0.3356 (6) | 1.1794 (4) | 0.72765 (11) | 0.0648 (9) | |
H12 | 0.3720 | 1.2450 | 0.7009 | 0.078* | |
C13 | 0.4753 (5) | 1.1491 (3) | 0.76934 (10) | 0.0538 (7) | |
H13 | 0.6047 | 1.1940 | 0.7707 | 0.065* | |
C14 | 0.9161 (6) | 1.3027 (4) | 1.06416 (16) | 0.0849 (12) | |
H14A | 1.0319 | 1.2726 | 1.0866 | 0.127* | |
H14B | 0.8090 | 1.3405 | 1.0857 | 0.127* | |
H14C | 0.9580 | 1.3797 | 1.0403 | 0.127* | |
N1 | 0.7412 (3) | 0.8471 (2) | 1.01157 (8) | 0.0359 (5) | |
N2 | 0.6030 (3) | 0.8460 (2) | 0.97330 (8) | 0.0391 (5) | |
N3 | 0.5120 (3) | 0.9360 (3) | 0.89297 (8) | 0.0411 (5) | |
N4 | 0.5597 (4) | 1.0247 (3) | 0.85196 (9) | 0.0463 (6) | |
O1 | 0.8187 (3) | 1.0213 (2) | 0.93292 (7) | 0.0438 (5) | |
O2 | 0.8423 (3) | 1.1797 (2) | 1.03493 (9) | 0.0570 (6) | |
H4' | 0.660 (5) | 1.073 (3) | 0.8563 (11) | 0.048 (9)* | |
H2' | 0.720 (6) | 1.167 (4) | 1.0382 (13) | 0.084 (12)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Co1 | 0.0269 (3) | 0.0445 (3) | 0.0341 (3) | −0.0019 (2) | −0.00083 (18) | −0.0004 (2) |
C1 | 0.0589 (19) | 0.0546 (17) | 0.0445 (16) | −0.0123 (14) | −0.0024 (14) | 0.0054 (13) |
C2 | 0.088 (3) | 0.0600 (19) | 0.0428 (16) | −0.0077 (18) | −0.0077 (16) | 0.0091 (14) |
C3 | 0.086 (3) | 0.0534 (18) | 0.0543 (19) | −0.0007 (18) | 0.0204 (18) | 0.0125 (15) |
C4 | 0.057 (2) | 0.074 (2) | 0.086 (3) | −0.0096 (18) | 0.0160 (19) | 0.029 (2) |
C5 | 0.0419 (17) | 0.076 (2) | 0.073 (2) | −0.0062 (16) | 0.0013 (15) | 0.0258 (17) |
C6 | 0.0402 (14) | 0.0368 (13) | 0.0382 (14) | 0.0022 (11) | 0.0080 (11) | −0.0002 (11) |
C7 | 0.0284 (13) | 0.0454 (13) | 0.0362 (13) | 0.0017 (11) | 0.0003 (10) | −0.0023 (11) |
C8 | 0.0474 (17) | 0.0479 (15) | 0.0352 (14) | 0.0059 (12) | −0.0044 (12) | −0.0064 (11) |
C9 | 0.064 (2) | 0.0593 (19) | 0.0508 (18) | −0.0049 (15) | −0.0145 (15) | 0.0038 (14) |
C10 | 0.066 (2) | 0.078 (2) | 0.066 (2) | −0.0084 (18) | −0.0298 (17) | 0.0024 (18) |
C11 | 0.087 (3) | 0.071 (2) | 0.0549 (19) | 0.013 (2) | −0.0312 (18) | −0.0007 (18) |
C12 | 0.093 (3) | 0.0605 (19) | 0.0408 (17) | 0.0102 (18) | −0.0044 (16) | 0.0036 (14) |
C13 | 0.0610 (19) | 0.0583 (18) | 0.0420 (15) | 0.0018 (15) | 0.0001 (13) | −0.0031 (13) |
C14 | 0.058 (2) | 0.084 (3) | 0.113 (3) | −0.0036 (19) | 0.015 (2) | −0.047 (2) |
N1 | 0.0296 (11) | 0.0426 (12) | 0.0355 (11) | 0.0026 (9) | 0.0028 (9) | −0.0024 (9) |
N2 | 0.0313 (11) | 0.0472 (13) | 0.0386 (12) | 0.0003 (9) | 0.0013 (9) | −0.0009 (10) |
N3 | 0.0342 (12) | 0.0524 (13) | 0.0365 (12) | −0.0015 (10) | −0.0017 (9) | −0.0010 (10) |
N4 | 0.0397 (14) | 0.0592 (16) | 0.0394 (13) | −0.0065 (12) | −0.0059 (10) | 0.0034 (11) |
O1 | 0.0355 (10) | 0.0560 (12) | 0.0395 (10) | −0.0074 (9) | −0.0035 (8) | 0.0049 (8) |
O2 | 0.0295 (11) | 0.0635 (13) | 0.0786 (15) | −0.0035 (10) | 0.0100 (10) | −0.0232 (11) |
Co1—O1i | 2.0263 (18) | C8—C9 | 1.383 (4) |
Co1—O1 | 2.0263 (18) | C8—N4 | 1.397 (3) |
Co1—O2 | 2.114 (2) | C8—C13 | 1.398 (4) |
Co1—O2i | 2.114 (2) | C9—C10 | 1.387 (4) |
Co1—N1i | 2.193 (2) | C9—H9 | 0.9300 |
Co1—N1 | 2.193 (2) | C10—C11 | 1.381 (5) |
C1—C6 | 1.375 (4) | C10—H10 | 0.9300 |
C1—C2 | 1.389 (4) | C11—C12 | 1.373 (5) |
C1—H1 | 0.9300 | C11—H11 | 0.9300 |
C2—C3 | 1.368 (5) | C12—C13 | 1.384 (4) |
C2—H2 | 0.9300 | C12—H12 | 0.9300 |
C3—C4 | 1.363 (5) | C13—H13 | 0.9300 |
C3—H3 | 0.9300 | C14—O2 | 1.395 (4) |
C4—C5 | 1.387 (4) | C14—H14A | 0.9600 |
C4—H4 | 0.9300 | C14—H14B | 0.9600 |
C5—C6 | 1.392 (4) | C14—H14C | 0.9600 |
C5—H5 | 0.9300 | N1—N2 | 1.289 (3) |
C6—N1 | 1.429 (3) | N3—N4 | 1.347 (3) |
C7—O1 | 1.286 (3) | N4—H4' | 0.78 (3) |
C7—N3 | 1.325 (3) | O2—H2' | 0.81 (4) |
C7—N2 | 1.386 (3) | ||
O1i—Co1—O1 | 179.999 (1) | C9—C8—N4 | 121.6 (3) |
O1i—Co1—O2 | 89.97 (8) | C9—C8—C13 | 120.1 (3) |
O1—Co1—O2 | 90.03 (8) | N4—C8—C13 | 118.3 (3) |
O1i—Co1—O2i | 90.03 (8) | C8—C9—C10 | 119.5 (3) |
O1—Co1—O2i | 89.97 (8) | C8—C9—H9 | 120.2 |
O2—Co1—O2i | 179.997 (1) | C10—C9—H9 | 120.2 |
O1i—Co1—N1i | 75.34 (7) | C11—C10—C9 | 120.7 (3) |
O1—Co1—N1i | 104.66 (7) | C11—C10—H10 | 119.7 |
O2—Co1—N1i | 88.27 (8) | C9—C10—H10 | 119.7 |
O2i—Co1—N1i | 91.73 (8) | C12—C11—C10 | 119.6 (3) |
O1i—Co1—N1 | 104.66 (7) | C12—C11—H11 | 120.2 |
O1—Co1—N1 | 75.34 (7) | C10—C11—H11 | 120.2 |
O2—Co1—N1 | 91.73 (8) | C11—C12—C13 | 121.0 (3) |
O2i—Co1—N1 | 88.27 (8) | C11—C12—H12 | 119.5 |
N1i—Co1—N1 | 180.0 | C13—C12—H12 | 119.5 |
C6—C1—C2 | 120.2 (3) | C12—C13—C8 | 119.1 (3) |
C6—C1—H1 | 119.9 | C12—C13—H13 | 120.4 |
C2—C1—H1 | 119.9 | C8—C13—H13 | 120.4 |
C3—C2—C1 | 120.1 (3) | O2—C14—H14A | 109.5 |
C3—C2—H2 | 120.0 | O2—C14—H14B | 109.5 |
C1—C2—H2 | 120.0 | H14A—C14—H14B | 109.5 |
C4—C3—C2 | 120.2 (3) | O2—C14—H14C | 109.5 |
C4—C3—H3 | 119.9 | H14A—C14—H14C | 109.5 |
C2—C3—H3 | 119.9 | H14B—C14—H14C | 109.5 |
C3—C4—C5 | 120.6 (3) | N2—N1—C6 | 114.8 (2) |
C3—C4—H4 | 119.7 | N2—N1—Co1 | 114.78 (15) |
C5—C4—H4 | 119.7 | C6—N1—Co1 | 130.38 (16) |
C4—C5—C6 | 119.5 (3) | N1—N2—C7 | 111.8 (2) |
C4—C5—H5 | 120.3 | C7—N3—N4 | 112.2 (2) |
C6—C5—H5 | 120.3 | N3—N4—C8 | 121.3 (3) |
C1—C6—C5 | 119.4 (3) | N3—N4—H4' | 116 (2) |
C1—C6—N1 | 116.5 (2) | C8—N4—H4' | 122 (2) |
C5—C6—N1 | 124.1 (3) | C7—O1—Co1 | 114.33 (15) |
O1—C7—N3 | 125.5 (2) | C14—O2—Co1 | 130.91 (19) |
O1—C7—N2 | 123.8 (2) | C14—O2—H2' | 112 (3) |
N3—C7—N2 | 110.8 (2) | Co1—O2—H2' | 116 (3) |
C6—C1—C2—C3 | 0.6 (5) | O1—Co1—N1—C6 | 178.9 (2) |
C1—C2—C3—C4 | 0.1 (5) | O2—Co1—N1—C6 | −91.5 (2) |
C2—C3—C4—C5 | −0.5 (6) | O2i—Co1—N1—C6 | 88.5 (2) |
C3—C4—C5—C6 | 0.4 (5) | N1i—Co1—N1—C6 | −89 (10) |
C2—C1—C6—C5 | −0.8 (4) | C6—N1—N2—C7 | −178.5 (2) |
C2—C1—C6—N1 | 178.5 (3) | Co1—N1—N2—C7 | 1.8 (2) |
C4—C5—C6—C1 | 0.3 (5) | O1—C7—N2—N1 | −1.2 (3) |
C4—C5—C6—N1 | −178.9 (3) | N3—C7—N2—N1 | 179.1 (2) |
N4—C8—C9—C10 | 177.9 (3) | O1—C7—N3—N4 | 1.5 (4) |
C13—C8—C9—C10 | −0.9 (5) | N2—C7—N3—N4 | −178.9 (2) |
C8—C9—C10—C11 | 0.1 (5) | C7—N3—N4—C8 | −172.2 (2) |
C9—C10—C11—C12 | 0.7 (5) | C9—C8—N4—N3 | −1.8 (4) |
C10—C11—C12—C13 | −0.8 (5) | C13—C8—N4—N3 | 177.1 (3) |
C11—C12—C13—C8 | 0.0 (5) | N3—C7—O1—Co1 | 179.6 (2) |
C9—C8—C13—C12 | 0.9 (4) | N2—C7—O1—Co1 | −0.1 (3) |
N4—C8—C13—C12 | −178.0 (3) | O1i—Co1—O1—C7 | 129 (3) |
C1—C6—N1—N2 | 174.5 (2) | O2—Co1—O1—C7 | −90.99 (18) |
C5—C6—N1—N2 | −6.3 (4) | O2i—Co1—O1—C7 | 89.01 (18) |
C1—C6—N1—Co1 | −5.9 (3) | N1i—Co1—O1—C7 | −179.21 (17) |
C5—C6—N1—Co1 | 173.3 (2) | N1—Co1—O1—C7 | 0.79 (17) |
O1i—Co1—N1—N2 | 178.49 (15) | O1i—Co1—O2—C14 | 44.4 (3) |
O1—Co1—N1—N2 | −1.51 (15) | O1—Co1—O2—C14 | −135.6 (3) |
O2—Co1—N1—N2 | 88.07 (17) | O2i—Co1—O2—C14 | −89 (4) |
O2i—Co1—N1—N2 | −91.93 (17) | N1i—Co1—O2—C14 | −30.9 (3) |
N1i—Co1—N1—N2 | 91 (10) | N1—Co1—O2—C14 | 149.1 (3) |
O1i—Co1—N1—C6 | −1.1 (2) |
Symmetry code: (i) −x+2, −y+2, −z+2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4′···O1 | 0.78 (3) | 2.20 (3) | 2.587 (3) | 111 (2) |
O2—H2′···N2ii | 0.81 (4) | 2.11 (4) | 2.899 (3) | 166 (3) |
O2—H2′···N3ii | 0.81 (4) | 2.52 (4) | 3.161 (3) | 138 (3) |
Symmetry code: (ii) −x+1, −y+2, −z+2. |
Experimental details
Crystal data | |
Chemical formula | [Co(C13H11N4O)2(CH4O)2] |
Mr | 601.53 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 296 |
a, b, c (Å) | 6.492 (2), 8.926 (3), 25.159 (9) |
β (°) | 92.372 (6) |
V (Å3) | 1456.7 (9) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.64 |
Crystal size (mm) | 0.35 × 0.28 × 0.27 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.808, 0.847 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6990, 2564, 2037 |
Rint | 0.046 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.042, 0.117, 1.08 |
No. of reflections | 2564 |
No. of parameters | 196 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.40, −0.43 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4'···O1 | 0.78 (3) | 2.20 (3) | 2.587 (3) | 111 (2) |
O2—H2'···N2i | 0.81 (4) | 2.11 (4) | 2.899 (3) | 166 (3) |
O2—H2'···N3i | 0.81 (4) | 2.52 (4) | 3.161 (3) | 138 (3) |
Symmetry code: (i) −x+1, −y+2, −z+2. |
Acknowledgements
The authors appreciate the financial support of the Hundred Talents Program (2005012) of CAS, the Natural Science Foundation of China (20872105), the `Qinglan Project' of Jiangsu Province (Bu109805) and the Natural Science Foundation of Qinghai Province (2006-G-105).
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The diphenylcarbazide is often used for analytical determination of chromium in biological materials (Yarbro et al. 1976). As a multidentate ligand, diphenylcarbazide chelates the metal centres by two N atoms (Feigl 1924) or coordinates with the metal ions by O atom in monodentate fashion (Shafranskii et al., 1975a,b; Martynova et al., 1985), whereas the examples of diphenylcarbazide complexes, in which the ligands chelated metal ions bidentately by one O atom and one N atom, were very rare (Turkington et al., 1958; Deshpande et al., 1988). Herein we report the synthesis and crystal structure of such diphenylcarbazide coordinated cobalt complex with Co occuping an inversion centre (Fig. 1 and Table 1). The Packing diagram of I viewed down the a axis (Fig. 2) reveals hydrogen bond interactions (Table 2).