metal-organic compounds
Bis(2-amino-3H-benzothiazolium) bis(7-oxabicyclo[2.2.1]heptane-2,3-dicarboxylato)cobaltate(II) hexahydrate
aZhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, People's Republic of China, and bCollege of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, Zhejiang, People's Republic of China
*Correspondence e-mail: sky51@zjnu.cn
In the 7H7N2S)2[Co(C8H8O5)2]·6H2O, the heterocyclic N atom of the 2-aminobenzothiazole molecule is protonated. The CoII atom is situated on an inversion centre and exhibits a slightly distorted octahedral CoO6 coordination defined by the bridging O atoms of the bicycloheptane unit and four carboxylate O atoms of two symmetry-related and fully deprotonated ligands. The crystal packing is stabilized by N—H⋯O hydrogen bonds between the cations and anions and by O—H⋯O hydrogen bonds including the crystal water molecules.
of the title salt, (CRelated literature
7-Oxabicyclo[2.2.1]heptane-2,3-dicarboxylic anhydride (norcantharidin) is a lower toxicity anticancer drug, see: Shimi et al. (1982). For the importance of cobalt in biological systems, see: Jiao et al. (2005). For the isotypic structure of the Mn analogue, see: Wang et al. (2010). For related cobalt complexes, see: Wang et al. (1988, 2009).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2006); cell SAINT (Bruker, 2006); 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: SHELXL97.
Supporting information
10.1107/S1600536810020921/wm2351sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810020921/wm2351Isup2.hkl
Norcantharidin, cobalt acetate and 2-aminobenzothiazole were dissolved in 15 mL distilled water. The mixture was sealed in a 25 mL Teflon-lined stainless vessel and heated at 443 K for 3 d, then cooled slowly to room temperature. Pink crystals suitable for X-ray diffraction were obtained.
The H atoms bonded to C and N atoms were positioned geometrically and refined using a riding model [aromatic C—H = 0.93 Å, aliphatic C—H = 0.97–0.98 Å and N—H = 0.86 Å and Uiso(H)=1.2Ueq(parent atom)]. The H atoms of the water molecule were located in a difference Fourier maps and refined with O—H distance restraints of 0.85 (2) and Uiso(H) = 1.5Ueq(O).
Data collection: APEX2 (Bruker, 2006); cell
SAINT (Bruker, 2006); data reduction: SAINT (Bruker, 2006); 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: SHELXL97 (Sheldrick, 2008).Fig. 1. A view of the molecular units of the title salt showing the atom-labelling scheme with displacement ellipsoids drawn at the 30% probability. Symmetry code: A (-x+2, -y, -z). |
(C7H7N2S)2[Co(C8H8O5)2]·6H2O | Z = 1 |
Mr = 837.73 | F(000) = 437 |
Triclinic, P1 | Dx = 1.577 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 6.6924 (4) Å | Cell parameters from 2197 reflections |
b = 10.1294 (5) Å | θ = 1.5–27.6° |
c = 13.1860 (7) Å | µ = 0.69 mm−1 |
α = 90.094 (4)° | T = 296 K |
β = 91.112 (4)° | Block, pink |
γ = 99.314 (4)° | 0.19 × 0.16 × 0.07 mm |
V = 881.92 (8) Å3 |
Bruker APEXII area-detector diffractometer | 3999 independent reflections |
Radiation source: fine-focus sealed tube | 2460 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.051 |
ω scans | θmax = 27.6°, θmin = 1.5° |
Absorption correction: multi-scan SADABS (Sheldrick, 1996) | h = −8→8 |
Tmin = 0.876, Tmax = 0.953 | k = −11→13 |
13051 measured reflections | l = −17→17 |
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)] = 0.052 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.130 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0599P)2] where P = (Fo2 + 2Fc2)/3 |
3999 reflections | (Δ/σ)max < 0.001 |
262 parameters | Δρmax = 0.47 e Å−3 |
10 restraints | Δρmin = −0.44 e Å−3 |
(C7H7N2S)2[Co(C8H8O5)2]·6H2O | γ = 99.314 (4)° |
Mr = 837.73 | V = 881.92 (8) Å3 |
Triclinic, P1 | Z = 1 |
a = 6.6924 (4) Å | Mo Kα radiation |
b = 10.1294 (5) Å | µ = 0.69 mm−1 |
c = 13.1860 (7) Å | T = 296 K |
α = 90.094 (4)° | 0.19 × 0.16 × 0.07 mm |
β = 91.112 (4)° |
Bruker APEXII area-detector diffractometer | 3999 independent reflections |
Absorption correction: multi-scan SADABS (Sheldrick, 1996) | 2460 reflections with I > 2σ(I) |
Tmin = 0.876, Tmax = 0.953 | Rint = 0.051 |
13051 measured reflections |
R[F2 > 2σ(F2)] = 0.052 | 10 restraints |
wR(F2) = 0.130 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.47 e Å−3 |
3999 reflections | Δρmin = −0.44 e Å−3 |
262 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 | 0.5000 | 0.0000 | 0.0000 | 0.0303 (2) | |
S1 | 0.32716 (14) | 0.26697 (8) | 0.52780 (6) | 0.0399 (2) | |
N1 | 0.2766 (4) | 0.0309 (2) | 0.60086 (19) | 0.0302 (6) | |
H1N | 0.277 (5) | −0.031 (3) | 0.644 (2) | 0.045* | |
N2 | 0.3473 (4) | 0.1974 (3) | 0.7234 (2) | 0.0406 (7) | |
H2C | 0.3394 | 0.1394 | 0.7713 | 0.049* | |
H2D | 0.3742 | 0.2814 | 0.7375 | 0.049* | |
O1 | 0.7726 (3) | 0.1597 (2) | 0.25745 (15) | 0.0384 (6) | |
O1W | 0.1942 (5) | 0.5445 (3) | 0.4012 (2) | 0.0706 (8) | |
H1WA | 0.199 (7) | 0.563 (5) | 0.4621 (17) | 0.106* | |
H1WB | 0.085 (5) | 0.492 (4) | 0.393 (3) | 0.106* | |
O2 | 0.6869 (3) | 0.0130 (2) | 0.13153 (15) | 0.0376 (6) | |
O2W | 0.5190 (4) | 0.5231 (2) | 0.2784 (2) | 0.0546 (7) | |
H2WA | 0.478 (6) | 0.473 (4) | 0.228 (2) | 0.082* | |
H2WB | 0.416 (4) | 0.522 (4) | 0.313 (3) | 0.082* | |
O3 | 0.3619 (3) | 0.3400 (2) | 0.13885 (17) | 0.0429 (6) | |
O3W | 0.8114 (5) | 0.3962 (3) | 0.3736 (2) | 0.0608 (7) | |
H3WA | 0.828 (6) | 0.334 (3) | 0.334 (3) | 0.091* | |
H3WB | 0.723 (6) | 0.432 (4) | 0.345 (3) | 0.091* | |
O4 | 0.3648 (3) | 0.14697 (19) | 0.06047 (16) | 0.0369 (5) | |
O5 | 0.7143 (3) | 0.15513 (19) | −0.06851 (15) | 0.0327 (5) | |
C1 | 0.9035 (5) | 0.1842 (3) | −0.0093 (2) | 0.0334 (8) | |
H1A | 0.9718 | 0.1064 | −0.0002 | 0.040* | |
C2 | 1.0232 (5) | 0.2949 (3) | −0.0715 (2) | 0.0396 (8) | |
H2A | 1.0898 | 0.2587 | −0.1274 | 0.047* | |
H2B | 1.1237 | 0.3514 | −0.0299 | 0.047* | |
C3 | 0.8570 (5) | 0.3722 (3) | −0.1100 (2) | 0.0397 (8) | |
H3A | 0.8797 | 0.4637 | −0.0851 | 0.048* | |
H3B | 0.8483 | 0.3724 | −0.1835 | 0.048* | |
C4 | 0.6689 (5) | 0.2912 (3) | −0.0646 (2) | 0.0321 (7) | |
H4A | 0.5435 | 0.3016 | −0.1011 | 0.039* | |
C5 | 0.6600 (5) | 0.3150 (3) | 0.0495 (2) | 0.0298 (7) | |
H5A | 0.6967 | 0.4107 | 0.0645 | 0.036* | |
C6 | 0.8339 (5) | 0.2379 (3) | 0.0895 (2) | 0.0301 (7) | |
H6A | 0.9443 | 0.3018 | 0.1201 | 0.036* | |
C7 | 0.7589 (5) | 0.1300 (3) | 0.1659 (2) | 0.0307 (7) | |
C8 | 0.4489 (5) | 0.2639 (3) | 0.0876 (2) | 0.0314 (7) | |
C9 | 0.2570 (5) | 0.1328 (4) | 0.3395 (2) | 0.0444 (9) | |
H9A | 0.2729 | 0.2130 | 0.3041 | 0.053* | |
C10 | 0.2146 (5) | 0.0118 (4) | 0.2888 (3) | 0.0497 (10) | |
H10A | 0.2011 | 0.0102 | 0.2185 | 0.060* | |
C11 | 0.1922 (5) | −0.1068 (4) | 0.3421 (3) | 0.0466 (9) | |
H11A | 0.1645 | −0.1874 | 0.3067 | 0.056* | |
C12 | 0.2099 (5) | −0.1089 (3) | 0.4467 (2) | 0.0373 (8) | |
H12A | 0.1936 | −0.1892 | 0.4820 | 0.045* | |
C13 | 0.2522 (4) | 0.0113 (3) | 0.4966 (2) | 0.0291 (7) | |
C14 | 0.2750 (5) | 0.1318 (3) | 0.4437 (2) | 0.0325 (7) | |
C15 | 0.3185 (5) | 0.1578 (3) | 0.6290 (2) | 0.0297 (7) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Co1 | 0.0393 (4) | 0.0196 (3) | 0.0308 (4) | 0.0010 (3) | −0.0019 (3) | −0.0021 (2) |
S1 | 0.0525 (6) | 0.0285 (5) | 0.0373 (5) | 0.0028 (4) | −0.0009 (4) | 0.0063 (4) |
N1 | 0.0372 (16) | 0.0244 (15) | 0.0291 (16) | 0.0053 (12) | 0.0018 (12) | 0.0021 (11) |
N2 | 0.058 (2) | 0.0267 (15) | 0.0354 (16) | 0.0027 (13) | −0.0010 (13) | 0.0014 (12) |
O1 | 0.0575 (16) | 0.0301 (12) | 0.0265 (13) | 0.0042 (11) | −0.0040 (10) | 0.0005 (10) |
O1W | 0.068 (2) | 0.074 (2) | 0.0641 (19) | −0.0052 (16) | 0.0018 (16) | −0.0069 (17) |
O2 | 0.0504 (15) | 0.0225 (12) | 0.0367 (13) | −0.0029 (10) | −0.0079 (10) | 0.0022 (9) |
O2W | 0.0644 (19) | 0.0363 (15) | 0.0614 (18) | 0.0040 (13) | −0.0083 (14) | −0.0138 (13) |
O3 | 0.0439 (15) | 0.0339 (13) | 0.0519 (15) | 0.0093 (11) | 0.0025 (11) | −0.0134 (11) |
O3W | 0.067 (2) | 0.0509 (18) | 0.0643 (19) | 0.0122 (14) | −0.0146 (15) | −0.0112 (14) |
O4 | 0.0377 (14) | 0.0221 (12) | 0.0493 (14) | −0.0002 (10) | 0.0026 (10) | −0.0065 (10) |
O5 | 0.0406 (13) | 0.0233 (11) | 0.0322 (12) | −0.0005 (10) | 0.0010 (10) | −0.0025 (9) |
C1 | 0.0352 (19) | 0.0254 (17) | 0.041 (2) | 0.0085 (14) | 0.0014 (15) | 0.0004 (14) |
C2 | 0.042 (2) | 0.0328 (18) | 0.042 (2) | 0.0004 (16) | 0.0076 (16) | 0.0011 (15) |
C3 | 0.059 (2) | 0.0243 (17) | 0.0333 (19) | −0.0023 (16) | 0.0036 (16) | −0.0004 (14) |
C4 | 0.042 (2) | 0.0235 (16) | 0.0312 (18) | 0.0070 (14) | −0.0053 (14) | 0.0016 (13) |
C5 | 0.040 (2) | 0.0162 (15) | 0.0319 (18) | 0.0022 (13) | −0.0031 (14) | −0.0021 (13) |
C6 | 0.0338 (19) | 0.0221 (16) | 0.0325 (18) | −0.0005 (14) | −0.0042 (14) | −0.0009 (13) |
C7 | 0.0327 (19) | 0.0261 (17) | 0.0334 (19) | 0.0062 (14) | −0.0048 (14) | 0.0034 (14) |
C8 | 0.042 (2) | 0.0246 (17) | 0.0281 (17) | 0.0072 (15) | −0.0037 (14) | 0.0006 (14) |
C9 | 0.048 (2) | 0.053 (2) | 0.032 (2) | 0.0084 (18) | 0.0041 (16) | 0.0076 (17) |
C10 | 0.047 (2) | 0.075 (3) | 0.0282 (19) | 0.014 (2) | 0.0015 (16) | −0.006 (2) |
C11 | 0.039 (2) | 0.053 (2) | 0.047 (2) | 0.0080 (18) | −0.0002 (17) | −0.0193 (19) |
C12 | 0.037 (2) | 0.0364 (19) | 0.040 (2) | 0.0114 (15) | 0.0021 (15) | −0.0044 (16) |
C13 | 0.0247 (18) | 0.0316 (18) | 0.0316 (18) | 0.0061 (14) | 0.0033 (13) | −0.0007 (14) |
C14 | 0.0300 (18) | 0.0328 (18) | 0.0342 (19) | 0.0038 (14) | 0.0025 (14) | 0.0029 (14) |
C15 | 0.0334 (19) | 0.0268 (17) | 0.0283 (18) | 0.0032 (14) | 0.0024 (14) | −0.0019 (13) |
Co1—O4 | 2.033 (2) | C1—C2 | 1.520 (4) |
Co1—O4i | 2.033 (2) | C1—C6 | 1.521 (4) |
Co1—O2 | 2.110 (2) | C1—H1A | 0.9800 |
Co1—O2i | 2.110 (2) | C2—C3 | 1.539 (5) |
Co1—O5i | 2.160 (2) | C2—H2A | 0.9700 |
Co1—O5 | 2.160 (2) | C2—H2B | 0.9700 |
S1—C15 | 1.730 (3) | C3—C4 | 1.521 (4) |
S1—C14 | 1.747 (3) | C3—H3A | 0.9700 |
N1—C15 | 1.322 (4) | C3—H3B | 0.9700 |
N1—C13 | 1.392 (4) | C4—C5 | 1.527 (4) |
N1—H1N | 0.840 (17) | C4—H4A | 0.9800 |
N2—C15 | 1.308 (4) | C5—C8 | 1.519 (4) |
N2—H2C | 0.8600 | C5—C6 | 1.585 (4) |
N2—H2D | 0.8600 | C5—H5A | 0.9800 |
O1—C7 | 1.242 (3) | C6—C7 | 1.519 (4) |
O1W—H1WA | 0.823 (18) | C6—H6A | 0.9800 |
O1W—H1WB | 0.839 (19) | C9—C14 | 1.377 (4) |
O2—C7 | 1.283 (3) | C9—C10 | 1.380 (5) |
O2W—H2WA | 0.852 (18) | C9—H9A | 0.9300 |
O2W—H2WB | 0.828 (18) | C10—C11 | 1.381 (5) |
O3—C8 | 1.245 (4) | C10—H10A | 0.9300 |
O3W—H3WA | 0.842 (18) | C11—C12 | 1.383 (4) |
O3W—H3WB | 0.831 (18) | C11—H11A | 0.9300 |
O4—C8 | 1.274 (3) | C12—C13 | 1.369 (4) |
O5—C4 | 1.460 (3) | C12—H12A | 0.9300 |
O5—C1 | 1.463 (4) | C13—C14 | 1.395 (4) |
O4—Co1—O4i | 180.00 (14) | H3A—C3—H3B | 109.3 |
O4—Co1—O2 | 87.71 (9) | O5—C4—C3 | 102.3 (2) |
O4i—Co1—O2 | 92.29 (9) | O5—C4—C5 | 101.9 (2) |
O4—Co1—O2i | 92.29 (9) | C3—C4—C5 | 111.7 (3) |
O4i—Co1—O2i | 87.71 (9) | O5—C4—H4A | 113.3 |
O2—Co1—O2i | 180.00 (6) | C3—C4—H4A | 113.3 |
O4—Co1—O5i | 92.19 (8) | C5—C4—H4A | 113.3 |
O4i—Co1—O5i | 87.81 (8) | C8—C5—C4 | 110.4 (2) |
O2—Co1—O5i | 90.69 (8) | C8—C5—C6 | 115.9 (2) |
O2i—Co1—O5i | 89.31 (8) | C4—C5—C6 | 100.7 (2) |
O4—Co1—O5 | 87.81 (8) | C8—C5—H5A | 109.8 |
O4i—Co1—O5 | 92.19 (8) | C4—C5—H5A | 109.8 |
O2—Co1—O5 | 89.31 (8) | C6—C5—H5A | 109.8 |
O2i—Co1—O5 | 90.69 (8) | C7—C6—C1 | 113.9 (2) |
O5i—Co1—O5 | 180.00 (12) | C7—C6—C5 | 112.7 (2) |
C15—S1—C14 | 90.24 (14) | C1—C6—C5 | 101.1 (2) |
C15—N1—C13 | 114.3 (2) | C7—C6—H6A | 109.6 |
C15—N1—H1N | 121 (2) | C1—C6—H6A | 109.6 |
C13—N1—H1N | 125 (2) | C5—C6—H6A | 109.6 |
C15—N2—H2C | 120.0 | O1—C7—O2 | 124.1 (3) |
C15—N2—H2D | 120.0 | O1—C7—C6 | 118.3 (3) |
H2C—N2—H2D | 120.0 | O2—C7—C6 | 117.7 (3) |
H1WA—O1W—H1WB | 104 (3) | O3—C8—O4 | 123.0 (3) |
C7—O2—Co1 | 117.83 (18) | O3—C8—C5 | 118.9 (3) |
H2WA—O2W—H2WB | 104 (3) | O4—C8—C5 | 118.0 (3) |
H3WA—O3W—H3WB | 104 (3) | C14—C9—C10 | 118.4 (3) |
C8—O4—Co1 | 127.4 (2) | C14—C9—H9A | 120.8 |
C4—O5—C1 | 95.5 (2) | C10—C9—H9A | 120.8 |
C4—O5—Co1 | 117.10 (17) | C9—C10—C11 | 120.3 (3) |
C1—O5—Co1 | 111.96 (16) | C9—C10—H10A | 119.8 |
O5—C1—C2 | 101.5 (2) | C11—C10—H10A | 119.8 |
O5—C1—C6 | 102.2 (2) | C10—C11—C12 | 121.7 (3) |
C2—C1—C6 | 111.5 (3) | C10—C11—H11A | 119.1 |
O5—C1—H1A | 113.5 | C12—C11—H11A | 119.1 |
C2—C1—H1A | 113.5 | C13—C12—C11 | 117.7 (3) |
C6—C1—H1A | 113.5 | C13—C12—H12A | 121.1 |
C1—C2—C3 | 102.2 (3) | C11—C12—H12A | 121.1 |
C1—C2—H2A | 111.3 | C12—C13—N1 | 126.7 (3) |
C3—C2—H2A | 111.3 | C12—C13—C14 | 121.1 (3) |
C1—C2—H2B | 111.3 | N1—C13—C14 | 112.2 (3) |
C3—C2—H2B | 111.3 | C9—C14—C13 | 120.7 (3) |
H2A—C2—H2B | 109.2 | C9—C14—S1 | 128.9 (3) |
C4—C3—C2 | 101.5 (2) | C13—C14—S1 | 110.4 (2) |
C4—C3—H3A | 111.5 | N2—C15—N1 | 123.8 (3) |
C2—C3—H3A | 111.5 | N2—C15—S1 | 123.3 (2) |
C4—C3—H3B | 111.5 | N1—C15—S1 | 112.9 (2) |
C2—C3—H3B | 111.5 | ||
O4—Co1—O2—C7 | −42.6 (2) | C2—C1—C6—C5 | 72.9 (3) |
O4i—Co1—O2—C7 | 137.4 (2) | C8—C5—C6—C7 | −3.8 (3) |
O5i—Co1—O2—C7 | −134.8 (2) | C4—C5—C6—C7 | −122.9 (3) |
O5—Co1—O2—C7 | 45.2 (2) | C8—C5—C6—C1 | 118.2 (3) |
O2—Co1—O4—C8 | 58.0 (2) | C4—C5—C6—C1 | −0.9 (3) |
O2i—Co1—O4—C8 | −122.0 (2) | Co1—O2—C7—O1 | 139.8 (2) |
O5i—Co1—O4—C8 | 148.6 (2) | Co1—O2—C7—C6 | −40.9 (3) |
O5—Co1—O4—C8 | −31.4 (2) | C1—C6—C7—O1 | 152.8 (3) |
O4—Co1—O5—C4 | −10.50 (18) | C5—C6—C7—O1 | −92.7 (3) |
O4i—Co1—O5—C4 | 169.50 (18) | C1—C6—C7—O2 | −26.5 (4) |
O2—Co1—O5—C4 | −98.23 (18) | C5—C6—C7—O2 | 87.9 (3) |
O2i—Co1—O5—C4 | 81.77 (18) | Co1—O4—C8—O3 | −167.9 (2) |
O4—Co1—O5—C1 | 98.29 (18) | Co1—O4—C8—C5 | 16.1 (4) |
O4i—Co1—O5—C1 | −81.71 (18) | C4—C5—C8—O3 | −128.2 (3) |
O2—Co1—O5—C1 | 10.55 (18) | C6—C5—C8—O3 | 118.2 (3) |
O2i—Co1—O5—C1 | −169.45 (18) | C4—C5—C8—O4 | 48.0 (3) |
C4—O5—C1—C2 | −57.1 (3) | C6—C5—C8—O4 | −65.7 (3) |
Co1—O5—C1—C2 | −179.28 (17) | C14—C9—C10—C11 | −0.3 (5) |
C4—O5—C1—C6 | 58.2 (2) | C9—C10—C11—C12 | 0.4 (5) |
Co1—O5—C1—C6 | −64.0 (2) | C10—C11—C12—C13 | −0.5 (5) |
O5—C1—C2—C3 | 35.8 (3) | C11—C12—C13—N1 | −179.8 (3) |
C6—C1—C2—C3 | −72.4 (3) | C11—C12—C13—C14 | 0.5 (5) |
C1—C2—C3—C4 | −0.9 (3) | C15—N1—C13—C12 | 179.5 (3) |
C1—O5—C4—C3 | 56.9 (3) | C15—N1—C13—C14 | −0.8 (4) |
Co1—O5—C4—C3 | 175.04 (17) | C10—C9—C14—C13 | 0.4 (5) |
C1—O5—C4—C5 | −58.7 (3) | C10—C9—C14—S1 | 180.0 (3) |
Co1—O5—C4—C5 | 59.4 (2) | C12—C13—C14—C9 | −0.5 (5) |
C2—C3—C4—O5 | −34.6 (3) | N1—C13—C14—C9 | 179.7 (3) |
C2—C3—C4—C5 | 73.7 (3) | C12—C13—C14—S1 | 179.8 (2) |
O5—C4—C5—C8 | −86.5 (3) | N1—C13—C14—S1 | 0.1 (3) |
C3—C4—C5—C8 | 165.0 (3) | C15—S1—C14—C9 | −179.2 (3) |
O5—C4—C5—C6 | 36.5 (3) | C15—S1—C14—C13 | 0.5 (2) |
C3—C4—C5—C6 | −72.0 (3) | C13—N1—C15—N2 | −179.9 (3) |
O5—C1—C6—C7 | 86.2 (3) | C13—N1—C15—S1 | 1.2 (3) |
C2—C1—C6—C7 | −166.0 (3) | C14—S1—C15—N2 | −179.9 (3) |
O5—C1—C6—C5 | −34.9 (3) | C14—S1—C15—N1 | −0.9 (2) |
Symmetry code: (i) −x+1, −y, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O1ii | 0.84 (2) | 1.85 (2) | 2.675 (3) | 169 (3) |
N2—H2C···O2ii | 0.86 | 2.00 | 2.851 (3) | 173 |
N2—H2D···O2Wiii | 0.86 | 2.01 | 2.828 (4) | 160 |
O1W—H1WA···O3Wiii | 0.82 (2) | 2.21 (2) | 3.030 (4) | 176 (4) |
O1W—H1WB···O3Wiv | 0.84 (4) | 1.94 (2) | 2.769 (4) | 171 (5) |
O2W—H2WA···O3 | 0.85 (2) | 1.85 (2) | 2.686 (3) | 167 (4) |
O2W—H2WB···O1W | 0.83 (2) | 1.95 (2) | 2.772 (4) | 171 (4) |
O3W—H3WA···O1 | 0.84 (2) | 2.01 (2) | 2.815 (3) | 160 (4) |
O3W—H3WB···O2W | 0.83 (4) | 1.96 (4) | 2.790 (4) | 178 (4) |
Symmetry codes: (ii) −x+1, −y, −z+1; (iii) −x+1, −y+1, −z+1; (iv) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | (C7H7N2S)2[Co(C8H8O5)2]·6H2O |
Mr | 837.73 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 296 |
a, b, c (Å) | 6.6924 (4), 10.1294 (5), 13.1860 (7) |
α, β, γ (°) | 90.094 (4), 91.112 (4), 99.314 (4) |
V (Å3) | 881.92 (8) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 0.69 |
Crystal size (mm) | 0.19 × 0.16 × 0.07 |
Data collection | |
Diffractometer | Bruker APEXII area-detector diffractometer |
Absorption correction | Multi-scan SADABS (Sheldrick, 1996) |
Tmin, Tmax | 0.876, 0.953 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13051, 3999, 2460 |
Rint | 0.051 |
(sin θ/λ)max (Å−1) | 0.651 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.052, 0.130, 1.03 |
No. of reflections | 3999 |
No. of parameters | 262 |
No. of restraints | 10 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.47, −0.44 |
Computer programs: APEX2 (Bruker, 2006), SAINT (Bruker, 2006), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O1i | 0.84 (2) | 1.85 (2) | 2.675 (3) | 169 (3) |
N2—H2C···O2i | 0.86 | 2.00 | 2.851 (3) | 172.6 |
N2—H2D···O2Wii | 0.86 | 2.01 | 2.828 (4) | 159.5 |
O1W—H1WA···O3Wii | 0.82 (2) | 2.21 (2) | 3.030 (4) | 176 (4) |
O1W—H1WB···O3Wiii | 0.84 (4) | 1.94 (2) | 2.769 (4) | 171 (5) |
O2W—H2WA···O3 | 0.85 (2) | 1.85 (2) | 2.686 (3) | 167 (4) |
O2W—H2WB···O1W | 0.83 (2) | 1.95 (2) | 2.772 (4) | 171 (4) |
O3W—H3WA···O1 | 0.84 (2) | 2.01 (2) | 2.815 (3) | 160 (4) |
O3W—H3WB···O2W | 0.83 (4) | 1.96 (4) | 2.790 (4) | 178 (4) |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+1, −y+1, −z+1; (iii) x−1, y, z. |
Acknowledgements
The authors thank the Natural Science Foundation of Zhejiang Province, China (grant No. Y407301) for financial support.
References
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7-oxabicyclo[2,2,1] heptane-2,3-dicarboxylic anhydride (norcantharidin) derived from cantharidin is a lower toxicity anticancer drug (Shimi et al., 1982). Cobalt was recognized as an essential metal element widely distributed in biological systems such as cells and body (Jiao et al., 2005). Several related cobalt complexes with the same ligand (Wang et al., 1988) and with the ligand and with imidazole (Wang et al., 2009) have been reported.
In the title complex, (C7H7N2S)+2[Co(C8H8O5)2]2-(H2O)6, the CoII ion is located on a crystallographic centre of inversion. Two bridging oxygen atoms of the bicycloheptane units and four carboxylate oxygen atoms give rise to a slightly distorted octahedral coordination environment around the CoII atom. The bond angles O2—Co1—O2i, O4—Co1—O4i and O5—Co1—O5i (i: -x+1, -y, -z.) are 180°, while the bond angles O4—Co1—O2 and O2—Co1—O4i open up slightly from 87.71 (9)° to 92.29 (9)°, resulting in a slight distortion from the ideal octahedral geometry. The crystal packing is stabilized by N—H···O hydrogen bonds between the cations and anions and by O—H···O hydrogen bonds including the crystal water molecules.
The crystal structure of (C7H7N2S)+2[Co(C8H8O5)2]2-(H2O)6 is isotypic with that of the Mn analogue (Wang et al., 2010) where slightly longer metal—oxygen bonds are observed.