Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536808032674/lh2705sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536808032674/lh2705Isup2.hkl |
CCDC reference: 665463
Key indicators
- Single-crystal X-ray study
- T = 295 K
- Mean (C-C) = 0.007 Å
- R factor = 0.058
- wR factor = 0.193
- Data-to-parameter ratio = 13.1
checkCIF/PLATON results
No syntax errors found
Alert level C Value of measurement temperature given = 295.000 Value of melting point given = 0.000 PLAT213_ALERT_2_C Atom C6 has ADP max/min Ratio ............. 3.10 prola PLAT220_ALERT_2_C Large Non-Solvent C Ueq(max)/Ueq(min) ... 2.78 Ratio PLAT230_ALERT_2_C Hirshfeld Test Diff for O3 -- C15 .. 5.97 su PLAT241_ALERT_2_C Check High Ueq as Compared to Neighbors for C3 PLAT241_ALERT_2_C Check High Ueq as Compared to Neighbors for C4 PLAT241_ALERT_2_C Check High Ueq as Compared to Neighbors for C6 PLAT241_ALERT_2_C Check High Ueq as Compared to Neighbors for C7 PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for N1 PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for C15 PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor .... 2.28 PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ... 7 PLAT031_ALERT_4_C Refined Extinction Parameter within Range ...... 2.50 Sigma PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical . ?
Alert level G PLAT860_ALERT_3_G Note: Number of Least-Squares Restraints ....... 21
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 13 ALERT level C = Check and explain 1 ALERT level G = General alerts; check 1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 10 ALERT type 2 Indicator that the structure model may be wrong or deficient 2 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
Reagents and solvents used were of commercially available quality. The title complex (I) was synthesized according to the method of Zheng (2006). 4-(Quinolin-8-yloxy)butanohydrazide (0.01 mol), furan-2-carbaldehyde (0.01 mol), ethanol (40 ml) and some drops of acetic acid were added to a 100 ml flask and refluxed for 6 h. After cooling to room temperature, the solid product was separated by filtration. Colourless single crystals suitable for X-ray diffraction study were obtained by slow evaporation of a tetrahydrofuran solution over a period of 2 d.
All H atoms were placed in idealized positions (C—H = 0.93–0.97Å and N—H = 0.86Å) and refined as riding atoms with Uiso(H) = 1.2Ueq(C,N). In the molecule, some anisotropic displacemnt parameters of the atoms are larger than normal and restraints were applied in the form of the DELU and SIMU instructions in the SHELXL (Sheldrick, 2008) program.
Data collection: SMART (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); 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).
C18H17N3O3 | Z = 2 |
Mr = 323.35 | F(000) = 340 |
Triclinic, P1 | Dx = 1.318 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.2685 (17) Å | Cell parameters from 1197 reflections |
b = 8.6324 (17) Å | θ = 2.6–20.5° |
c = 12.765 (3) Å | µ = 0.09 mm−1 |
α = 100.64 (3)° | T = 295 K |
β = 100.36 (4)° | Block, colorless |
γ = 109.50 (3)° | 0.33 × 0.26 × 0.21 mm |
V = 814.9 (4) Å3 |
Bruker SMART CCD area-detector diffractometer | 2865 independent reflections |
Radiation source: fine-focus sealed tube | 1632 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.043 |
ϕ and ω scans | θmax = 25.0°, θmin = 1.7° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −9→8 |
Tmin = 0.970, Tmax = 0.981 | k = −10→10 |
9399 measured reflections | l = −15→15 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.058 | H-atom parameters constrained |
wR(F2) = 0.193 | w = 1/[σ2(Fo2) + (0.0865P)2 + 0.1859P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max < 0.001 |
2865 reflections | Δρmax = 0.24 e Å−3 |
218 parameters | Δρmin = −0.20 e Å−3 |
21 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.015 (6) |
C18H17N3O3 | γ = 109.50 (3)° |
Mr = 323.35 | V = 814.9 (4) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.2685 (17) Å | Mo Kα radiation |
b = 8.6324 (17) Å | µ = 0.09 mm−1 |
c = 12.765 (3) Å | T = 295 K |
α = 100.64 (3)° | 0.33 × 0.26 × 0.21 mm |
β = 100.36 (4)° |
Bruker SMART CCD area-detector diffractometer | 2865 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1632 reflections with I > 2σ(I) |
Tmin = 0.970, Tmax = 0.981 | Rint = 0.043 |
9399 measured reflections |
R[F2 > 2σ(F2)] = 0.058 | 21 restraints |
wR(F2) = 0.193 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.24 e Å−3 |
2865 reflections | Δρmin = −0.20 e Å−3 |
218 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 | ||
N1 | 0.2058 (3) | 0.5842 (4) | 0.8792 (2) | 0.0700 (8) | |
N2 | −0.0972 (4) | 0.3300 (3) | 0.3273 (2) | 0.0681 (8) | |
H1 | −0.1174 | 0.3754 | 0.2743 | 0.082* | |
N3 | −0.2378 (4) | 0.2174 (3) | 0.3521 (2) | 0.0608 (7) | |
O1 | 0.2645 (3) | 0.3778 (2) | 0.72254 (16) | 0.0631 (6) | |
O2 | 0.1947 (3) | 0.4670 (3) | 0.3574 (2) | 0.0890 (8) | |
C16 | −0.7219 (5) | 0.0732 (5) | 0.2779 (3) | 0.0811 (10) | |
H16 | −0.7644 | 0.1349 | 0.2353 | 0.097* | |
C1 | 0.2775 (4) | 0.3409 (4) | 0.8220 (3) | 0.0682 (9) | |
C2 | 0.3186 (5) | 0.2071 (5) | 0.8455 (4) | 0.1060 (15) | |
H2 | 0.3394 | 0.1330 | 0.7916 | 0.127* | |
C3 | 0.3287 (7) | 0.1846 (8) | 0.9529 (6) | 0.147 (2) | |
H3 | 0.3525 | 0.0920 | 0.9682 | 0.176* | |
C4 | 0.3056 (7) | 0.2905 (10) | 1.0325 (5) | 0.154 (3) | |
H4 | 0.3176 | 0.2727 | 1.1026 | 0.184* | |
C5 | 0.2631 (5) | 0.4296 (8) | 1.0135 (4) | 0.1188 (17) | |
C6 | 0.2347 (8) | 0.5503 (12) | 1.0944 (5) | 0.164 (3) | |
H6 | 0.2409 | 0.5392 | 1.1659 | 0.197* | |
C7 | 0.1999 (8) | 0.6759 (9) | 1.0659 (4) | 0.154 (3) | |
H7 | 0.1858 | 0.7570 | 1.1185 | 0.185* | |
C8 | 0.1837 (5) | 0.6903 (6) | 0.9582 (3) | 0.1034 (15) | |
H8 | 0.1556 | 0.7800 | 0.9411 | 0.124* | |
C9 | 0.2483 (4) | 0.4547 (5) | 0.9052 (2) | 0.0717 (10) | |
C10 | 0.3224 (4) | 0.2872 (4) | 0.6405 (3) | 0.0767 (10) | |
H10A | 0.2543 | 0.1657 | 0.6233 | 0.092* | |
H10B | 0.4470 | 0.3077 | 0.6677 | 0.092* | |
C11 | 0.2946 (4) | 0.3499 (4) | 0.5394 (3) | 0.0737 (10) | |
H11A | 0.3515 | 0.3051 | 0.4880 | 0.088* | |
H11B | 0.3517 | 0.4731 | 0.5600 | 0.088* | |
C12 | 0.1001 (4) | 0.2989 (4) | 0.4818 (3) | 0.0660 (9) | |
H12A | 0.0446 | 0.1756 | 0.4569 | 0.079* | |
H12B | 0.0413 | 0.3375 | 0.5344 | 0.079* | |
C13 | 0.0731 (5) | 0.3712 (4) | 0.3847 (3) | 0.0657 (9) | |
C14 | −0.3915 (4) | 0.2060 (4) | 0.3007 (2) | 0.0617 (8) | |
H14 | −0.3984 | 0.2746 | 0.2532 | 0.074* | |
C15 | −0.5530 (4) | 0.0908 (4) | 0.3141 (2) | 0.0591 (8) | |
O3 | −0.5432 (3) | −0.0227 (3) | 0.3737 (2) | 0.0872 (8) | |
C18 | −0.7117 (6) | −0.1128 (5) | 0.3740 (4) | 0.1000 (13) | |
H18 | −0.7433 | −0.1998 | 0.4089 | 0.120* | |
C17 | −0.8239 (5) | −0.0625 (5) | 0.3191 (3) | 0.0867 (12) | |
H17 | −0.9466 | −0.1055 | 0.3084 | 0.104* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0610 (17) | 0.0779 (18) | 0.0552 (16) | 0.0069 (14) | 0.0221 (13) | 0.0102 (14) |
N2 | 0.0650 (18) | 0.0685 (17) | 0.0741 (17) | 0.0177 (14) | 0.0275 (14) | 0.0316 (14) |
N3 | 0.0621 (17) | 0.0560 (15) | 0.0643 (15) | 0.0150 (13) | 0.0258 (13) | 0.0206 (12) |
O1 | 0.0712 (14) | 0.0671 (13) | 0.0592 (13) | 0.0337 (11) | 0.0168 (10) | 0.0224 (10) |
O2 | 0.0729 (17) | 0.0872 (17) | 0.1058 (19) | 0.0133 (13) | 0.0390 (14) | 0.0396 (14) |
C16 | 0.070 (2) | 0.097 (3) | 0.073 (2) | 0.032 (2) | 0.0116 (18) | 0.020 (2) |
C1 | 0.0464 (18) | 0.068 (2) | 0.077 (2) | 0.0050 (15) | −0.0011 (15) | 0.0366 (19) |
C2 | 0.062 (2) | 0.086 (3) | 0.154 (4) | 0.011 (2) | −0.011 (2) | 0.065 (3) |
C3 | 0.086 (3) | 0.140 (4) | 0.180 (5) | −0.006 (3) | −0.031 (4) | 0.122 (4) |
C4 | 0.081 (3) | 0.199 (5) | 0.126 (4) | −0.028 (3) | −0.024 (3) | 0.119 (4) |
C5 | 0.055 (2) | 0.178 (4) | 0.077 (3) | −0.024 (2) | −0.0051 (19) | 0.079 (3) |
C6 | 0.079 (4) | 0.269 (8) | 0.046 (3) | −0.051 (4) | 0.011 (2) | 0.031 (4) |
C7 | 0.087 (4) | 0.208 (7) | 0.067 (4) | −0.039 (4) | 0.036 (3) | −0.037 (4) |
C8 | 0.078 (3) | 0.109 (3) | 0.082 (3) | −0.004 (2) | 0.040 (2) | −0.015 (2) |
C9 | 0.0455 (19) | 0.092 (3) | 0.0510 (19) | −0.0082 (17) | 0.0031 (14) | 0.0302 (19) |
C10 | 0.061 (2) | 0.072 (2) | 0.088 (2) | 0.0296 (18) | 0.0090 (18) | 0.0025 (19) |
C11 | 0.058 (2) | 0.082 (2) | 0.069 (2) | 0.0210 (17) | 0.0216 (17) | −0.0016 (18) |
C12 | 0.060 (2) | 0.0655 (19) | 0.069 (2) | 0.0189 (16) | 0.0242 (16) | 0.0123 (16) |
C13 | 0.071 (2) | 0.0574 (19) | 0.070 (2) | 0.0195 (17) | 0.0317 (18) | 0.0178 (16) |
C14 | 0.067 (2) | 0.0621 (19) | 0.0605 (18) | 0.0215 (16) | 0.0234 (16) | 0.0245 (15) |
C15 | 0.068 (2) | 0.0585 (18) | 0.0535 (17) | 0.0218 (16) | 0.0202 (15) | 0.0199 (14) |
O3 | 0.0827 (18) | 0.0858 (17) | 0.1002 (18) | 0.0247 (14) | 0.0323 (14) | 0.0469 (14) |
C18 | 0.083 (3) | 0.092 (3) | 0.113 (3) | 0.004 (2) | 0.046 (3) | 0.034 (2) |
C17 | 0.054 (2) | 0.096 (3) | 0.081 (2) | 0.005 (2) | 0.0213 (19) | −0.002 (2) |
N1—C8 | 1.314 (4) | C6—C7 | 1.306 (10) |
N1—C9 | 1.357 (4) | C6—H6 | 0.9300 |
N2—C13 | 1.358 (4) | C7—C8 | 1.389 (7) |
N2—N3 | 1.374 (3) | C7—H7 | 0.9300 |
N2—H1 | 0.8600 | C8—H8 | 0.9300 |
N3—C14 | 1.283 (4) | C10—C11 | 1.499 (5) |
O1—C1 | 1.360 (4) | C10—H10A | 0.9700 |
O1—C10 | 1.437 (4) | C10—H10B | 0.9700 |
O2—C13 | 1.222 (4) | C11—C12 | 1.517 (4) |
C16—C15 | 1.337 (5) | C11—H11A | 0.9700 |
C16—C17 | 1.445 (5) | C11—H11B | 0.9700 |
C16—H16 | 0.9300 | C12—C13 | 1.501 (4) |
C1—C2 | 1.375 (5) | C12—H12A | 0.9700 |
C1—C9 | 1.419 (5) | C12—H12B | 0.9700 |
C2—C3 | 1.412 (7) | C14—C15 | 1.435 (4) |
C2—H2 | 0.9300 | C14—H14 | 0.9300 |
C3—C4 | 1.322 (9) | C15—O3 | 1.361 (4) |
C3—H3 | 0.9300 | O3—C18 | 1.351 (4) |
C4—C5 | 1.408 (9) | C18—C17 | 1.300 (5) |
C4—H4 | 0.9300 | C18—H18 | 0.9300 |
C5—C9 | 1.428 (5) | C17—H17 | 0.9300 |
C5—C6 | 1.436 (9) | ||
C8—N1—C9 | 117.8 (3) | C1—C9—C5 | 119.4 (4) |
C13—N2—N3 | 121.3 (3) | O1—C10—C11 | 107.8 (3) |
C13—N2—H1 | 119.3 | O1—C10—H10A | 110.2 |
N3—N2—H1 | 119.3 | C11—C10—H10A | 110.2 |
C14—N3—N2 | 114.7 (3) | O1—C10—H10B | 110.2 |
C1—O1—C10 | 118.0 (3) | C11—C10—H10B | 110.2 |
C15—C16—C17 | 105.0 (3) | H10A—C10—H10B | 108.5 |
C15—C16—H16 | 127.5 | C10—C11—C12 | 113.4 (3) |
C17—C16—H16 | 127.5 | C10—C11—H11A | 108.9 |
O1—C1—C2 | 124.8 (4) | C12—C11—H11A | 108.9 |
O1—C1—C9 | 115.0 (3) | C10—C11—H11B | 108.9 |
C2—C1—C9 | 120.2 (4) | C12—C11—H11B | 108.9 |
C1—C2—C3 | 118.7 (5) | H11A—C11—H11B | 107.7 |
C1—C2—H2 | 120.7 | C13—C12—C11 | 113.1 (3) |
C3—C2—H2 | 120.7 | C13—C12—H12A | 109.0 |
C4—C3—C2 | 122.3 (6) | C11—C12—H12A | 109.0 |
C4—C3—H3 | 118.8 | C13—C12—H12B | 109.0 |
C2—C3—H3 | 118.8 | C11—C12—H12B | 109.0 |
C3—C4—C5 | 121.5 (6) | H12A—C12—H12B | 107.8 |
C3—C4—H4 | 119.2 | O2—C13—N2 | 119.3 (3) |
C5—C4—H4 | 119.2 | O2—C13—C12 | 123.6 (3) |
C4—C5—C9 | 117.7 (6) | N2—C13—C12 | 117.1 (3) |
C4—C5—C6 | 125.4 (5) | N3—C14—C15 | 122.2 (3) |
C9—C5—C6 | 116.8 (6) | N3—C14—H14 | 118.9 |
C7—C6—C5 | 118.9 (6) | C15—C14—H14 | 118.9 |
C7—C6—H6 | 120.5 | C16—C15—O3 | 110.4 (3) |
C5—C6—H6 | 120.5 | C16—C15—C14 | 130.9 (3) |
C6—C7—C8 | 121.1 (7) | O3—C15—C14 | 118.7 (3) |
C6—C7—H7 | 119.5 | C18—O3—C15 | 106.4 (3) |
C8—C7—H7 | 119.5 | C17—C18—O3 | 111.3 (4) |
N1—C8—C7 | 123.6 (5) | C17—C18—H18 | 124.4 |
N1—C8—H8 | 118.2 | O3—C18—H18 | 124.4 |
C7—C8—H8 | 118.2 | C18—C17—C16 | 106.9 (3) |
N1—C9—C1 | 118.9 (3) | C18—C17—H17 | 126.5 |
N1—C9—C5 | 121.7 (4) | C16—C17—H17 | 126.5 |
C13—N2—N3—C14 | 171.9 (3) | C6—C5—C9—N1 | −1.4 (5) |
C10—O1—C1—C2 | −9.5 (4) | C4—C5—C9—C1 | −0.4 (5) |
C10—O1—C1—C9 | 169.3 (2) | C6—C5—C9—C1 | 179.1 (4) |
O1—C1—C2—C3 | 179.6 (3) | C1—O1—C10—C11 | 179.9 (2) |
C9—C1—C2—C3 | 0.8 (5) | O1—C10—C11—C12 | −68.5 (3) |
C1—C2—C3—C4 | −2.2 (7) | C10—C11—C12—C13 | 176.4 (3) |
C2—C3—C4—C5 | 2.2 (9) | N3—N2—C13—O2 | 177.3 (3) |
C3—C4—C5—C9 | −0.9 (7) | N3—N2—C13—C12 | −4.6 (4) |
C3—C4—C5—C6 | 179.6 (5) | C11—C12—C13—O2 | −2.9 (4) |
C4—C5—C6—C7 | 178.5 (5) | C11—C12—C13—N2 | 179.1 (3) |
C9—C5—C6—C7 | −1.0 (8) | N2—N3—C14—C15 | 178.1 (3) |
C5—C6—C7—C8 | 2.4 (10) | C17—C16—C15—O3 | 0.2 (4) |
C9—N1—C8—C7 | −0.6 (5) | C17—C16—C15—C14 | −179.2 (3) |
C6—C7—C8—N1 | −1.7 (8) | N3—C14—C15—C16 | 172.0 (3) |
C8—N1—C9—C1 | −178.4 (3) | N3—C14—C15—O3 | −7.3 (4) |
C8—N1—C9—C5 | 2.1 (4) | C16—C15—O3—C18 | 0.0 (4) |
O1—C1—C9—N1 | 2.0 (4) | C14—C15—O3—C18 | 179.5 (3) |
C2—C1—C9—N1 | −179.2 (3) | C15—O3—C18—C17 | −0.2 (4) |
O1—C1—C9—C5 | −178.5 (3) | O3—C18—C17—C16 | 0.3 (5) |
C2—C1—C9—C5 | 0.4 (4) | C15—C16—C17—C18 | −0.2 (4) |
C4—C5—C9—N1 | 179.2 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1···N1i | 0.86 | 2.10 | 2.936 (4) | 164 |
Symmetry code: (i) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C18H17N3O3 |
Mr | 323.35 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 295 |
a, b, c (Å) | 8.2685 (17), 8.6324 (17), 12.765 (3) |
α, β, γ (°) | 100.64 (3), 100.36 (4), 109.50 (3) |
V (Å3) | 814.9 (4) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.33 × 0.26 × 0.21 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.970, 0.981 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9399, 2865, 1632 |
Rint | 0.043 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.058, 0.193, 1.06 |
No. of reflections | 2865 |
No. of parameters | 218 |
No. of restraints | 21 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.24, −0.20 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1···N1i | 0.86 | 2.10 | 2.936 (4) | 164 |
Symmetry code: (i) −x, −y+1, −z+1. |
Synthsis of 8-Hydroxyquinoline and its derivatives have attracted a great interest due to their interesting biological activities and applications in coordination chemistry (Cai et al., 2003; Chen et al., 2005; Park et al., 2006; Karmakar et al. 2007). Herein, we report the synthesis and crystal structure of the title compound, (I). The molecular structure of (I) is shown in Fig. 1. The conformation along the O1—C10—C11—C12—C13—N2—N3—C14 bond sequence is (-)gauche-trans-trans-(-)gauche-trans. The mean planes of the furan ring and quinoline group make a dihedral angle of 77.4 (2) °. In the crystal structure (Fig. 2), intermolecular N—H···N hydrogen bonds (Table 1) link the molecules into centrosymmetric dimers. Some crystal structures which are closely related to the title compound have already been studied (Zheng, 2006; Zheng, Wu et al.,2006; Zheng, et al.,2007; Zheng, Li et al., 2006; Zheng, et al., 2008.