organic compounds
2-Methoxy-N-[5-(2-methoxyphenyl)-1,3,4-thiadiazol-2-yl]benzamide hemihydrate
aDepartment of Applied Chemistry, College of Science, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China
*Correspondence e-mail: rwan@njut.edu.cn
In the molecule of the title compound, C17H15N3O3S·0.5H2O, the thiadiazole ring is oriented with respect to the two 2-methoxyphenyl rings at dihedral angles of 3.70 (3) and 1.74 (2)°. An intramolecular N—H⋯O hydrogen bond results in the formation of a planar six-membered ring, which is oriented with respect to the thiadiazole ring at a dihedral angle of 1.33 (3)°. Thus, all of the rings are nearly coplanar. In the intermolecular O—H⋯N and C—H⋯O hydrogen bonds link the molecules.
Experimental
Crystal data
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Refinement
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Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell CAD-4 Software; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
10.1107/S1600536808019934/hk2483sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808019934/hk2483Isup2.hkl
For preparation of the title compound, a solution of 5-(2-methoxyphenyl) -1,3,4-thiadiazol-2-amine (5 mmol) in pyridine (50 ml) was cooled to 273 K. To this solution, 2-methoxybenzoyl chloride (5 mmol) was added via a drop funnel over period of 30 min. The mixture was stirred at 273 K for 1 h, raised to room temperature and reacted for 1 h. The pyridine was distilled and the solid residue was recrystallized from ethanol to give the title compound (m.p. 513-514 K). Crystals suitable for X-ray analysis were obtained by slow evaporation of an acetone solution.
H atoms were positioned geometrically, with O-H = 0.85 Å (for H2O), N-H = 0.86 Å (for NH) and C-H = 0.93 and 0.96 Å for aromatic and methyl H, respectively, and constrained to ride on their parent atoms with Uiso(H) = xUeq(C,N,O), where x = 1.5 for methyl H and x = 1.2 for all other H atoms.
Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell
CAD-4 Software (Enraf–Nonius, 1989); data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C17H15N3O3S·0.5H2O | F(000) = 1464 |
Mr = 350.40 | Dx = 1.400 Mg m−3 |
Monoclinic, C2/c | Melting point = 513–514 K |
Hall symbol: -C 2yc | Mo Kα radiation, λ = 0.71073 Å |
a = 29.950 (6) Å | Cell parameters from 25 reflections |
b = 14.561 (3) Å | θ = 9–12° |
c = 7.6520 (15) Å | µ = 0.22 mm−1 |
β = 94.78 (3)° | T = 298 K |
V = 3325.4 (12) Å3 | Block, colorless |
Z = 8 | 0.30 × 0.10 × 0.05 mm |
Enraf–Nonius CAD-4 diffractometer | 1602 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.061 |
Graphite monochromator | θmax = 25.2°, θmin = 1.4° |
ω/2θ scans | h = −35→35 |
Absorption correction: ψ scan (North et al., 1968) | k = 0→17 |
Tmin = 0.937, Tmax = 0.989 | l = 0→9 |
6340 measured reflections | 3 standard reflections every 120 min |
3003 independent reflections | intensity decay: none |
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)] = 0.079 | H-atom parameters constrained |
wR(F2) = 0.241 | w = 1/[σ2(Fo2) + (0.1018P)2 + 4.918P] where P = (Fo2 + 2Fc2)/3 |
S = 1.04 | (Δ/σ)max < 0.001 |
3003 reflections | Δρmax = 0.57 e Å−3 |
222 parameters | Δρmin = −0.33 e Å−3 |
Primary atom site location: structure-invariant direct methods |
C17H15N3O3S·0.5H2O | V = 3325.4 (12) Å3 |
Mr = 350.40 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 29.950 (6) Å | µ = 0.22 mm−1 |
b = 14.561 (3) Å | T = 298 K |
c = 7.6520 (15) Å | 0.30 × 0.10 × 0.05 mm |
β = 94.78 (3)° |
Enraf–Nonius CAD-4 diffractometer | 1602 reflections with I > 2σ(I) |
Absorption correction: ψ scan (North et al., 1968) | Rint = 0.061 |
Tmin = 0.937, Tmax = 0.989 | 3 standard reflections every 120 min |
6340 measured reflections | intensity decay: none |
3003 independent reflections |
R[F2 > 2σ(F2)] = 0.079 | 222 parameters |
wR(F2) = 0.241 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.57 e Å−3 |
3003 reflections | Δρmin = −0.33 e Å−3 |
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 > 2sigma(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 | ||
S | 0.14065 (4) | 0.20610 (9) | 0.03340 (17) | 0.0643 (5) | |
O1 | 0.16810 (11) | 0.1136 (2) | −0.2572 (5) | 0.0694 (10) | |
O2 | 0.19106 (10) | 0.2584 (3) | 0.3483 (5) | 0.0761 (11) | |
O3 | 0.09246 (10) | 0.3994 (2) | 0.5803 (4) | 0.0623 (9) | |
O4 | 1.0000 | 0.3791 (4) | 0.2500 | 0.139 (3) | |
H4 | 0.9969 | 0.3526 | 0.3472 | 0.167* | |
N1 | 0.06625 (14) | 0.2824 (4) | 0.0904 (6) | 0.0805 (14) | |
N2 | 0.06140 (12) | 0.2445 (3) | −0.0693 (5) | 0.0622 (11) | |
N3 | 0.11780 (9) | 0.3022 (2) | 0.3039 (5) | 0.0430 (8) | |
H3A | 0.0969 | 0.3324 | 0.3490 | 0.052* | |
C1 | 0.20716 (19) | 0.0758 (5) | −0.3250 (9) | 0.105 (2) | |
H1B | 0.2323 | 0.0820 | −0.2392 | 0.157* | |
H1C | 0.2132 | 0.1081 | −0.4299 | 0.157* | |
H1D | 0.2022 | 0.0120 | −0.3516 | 0.157* | |
C2 | 0.12874 (16) | 0.1123 (3) | −0.3594 (6) | 0.0575 (12) | |
C3 | 0.09255 (15) | 0.1571 (3) | −0.2910 (6) | 0.0543 (11) | |
C4 | 0.05153 (18) | 0.1584 (4) | −0.3904 (7) | 0.0796 (16) | |
H4A | 0.0273 | 0.1894 | −0.3501 | 0.095* | |
C5 | 0.0471 (2) | 0.1124 (5) | −0.5522 (8) | 0.0946 (19) | |
H5A | 0.0194 | 0.1107 | −0.6165 | 0.114* | |
C6 | 0.0828 (2) | 0.0707 (5) | −0.6157 (8) | 0.0954 (19) | |
H6A | 0.0794 | 0.0422 | −0.7248 | 0.115* | |
C7 | 0.1229 (2) | 0.0696 (4) | −0.5235 (7) | 0.0742 (15) | |
H7A | 0.1470 | 0.0403 | −0.5690 | 0.089* | |
C8 | 0.09539 (14) | 0.2027 (3) | −0.1186 (6) | 0.0515 (11) | |
C9 | 0.10742 (16) | 0.2703 (4) | 0.1660 (8) | 0.0652 (14) | |
C10 | 0.16044 (14) | 0.2990 (3) | 0.4122 (6) | 0.0509 (11) | |
C11 | 0.05722 (17) | 0.4453 (4) | 0.6622 (8) | 0.0873 (19) | |
H11A | 0.0303 | 0.4444 | 0.5846 | 0.131* | |
H11B | 0.0658 | 0.5077 | 0.6873 | 0.131* | |
H11C | 0.0520 | 0.4143 | 0.7694 | 0.131* | |
C12 | 0.13322 (14) | 0.3932 (3) | 0.6683 (6) | 0.0486 (10) | |
C13 | 0.16640 (13) | 0.3438 (3) | 0.5879 (5) | 0.0467 (10) | |
C14 | 0.20858 (15) | 0.3341 (3) | 0.6785 (6) | 0.0599 (12) | |
H14A | 0.2305 | 0.3006 | 0.6276 | 0.072* | |
C15 | 0.21853 (18) | 0.3729 (4) | 0.8408 (7) | 0.0683 (14) | |
H15A | 0.2467 | 0.3653 | 0.9000 | 0.082* | |
C16 | 0.1862 (2) | 0.4227 (4) | 0.9133 (7) | 0.0790 (17) | |
H16A | 0.1934 | 0.4515 | 1.0205 | 0.095* | |
C17 | 0.14394 (18) | 0.4321 (3) | 0.8354 (7) | 0.0653 (13) | |
H17A | 0.1223 | 0.4639 | 0.8917 | 0.078* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S | 0.0561 (8) | 0.0660 (8) | 0.0708 (8) | 0.0122 (6) | 0.0047 (6) | −0.0030 (7) |
O1 | 0.064 (2) | 0.077 (2) | 0.069 (2) | 0.0236 (17) | 0.0142 (18) | −0.0027 (19) |
O2 | 0.0527 (19) | 0.107 (3) | 0.068 (2) | 0.0223 (19) | 0.0017 (16) | −0.028 (2) |
O3 | 0.0505 (18) | 0.070 (2) | 0.067 (2) | 0.0199 (15) | 0.0081 (16) | −0.0046 (18) |
O4 | 0.095 (5) | 0.093 (5) | 0.239 (10) | 0.000 | 0.060 (5) | 0.000 |
N1 | 0.069 (3) | 0.105 (4) | 0.067 (3) | 0.022 (3) | 0.006 (2) | −0.011 (3) |
N2 | 0.051 (2) | 0.087 (3) | 0.047 (2) | 0.018 (2) | −0.0025 (17) | −0.011 (2) |
N3 | 0.0212 (15) | 0.0347 (18) | 0.074 (2) | 0.0118 (13) | 0.0067 (16) | −0.0007 (18) |
C1 | 0.091 (4) | 0.124 (5) | 0.104 (5) | 0.055 (4) | 0.040 (4) | 0.011 (4) |
C2 | 0.071 (3) | 0.047 (3) | 0.054 (3) | 0.002 (2) | 0.004 (2) | 0.000 (2) |
C3 | 0.060 (3) | 0.055 (3) | 0.048 (2) | −0.003 (2) | 0.001 (2) | −0.003 (2) |
C4 | 0.067 (3) | 0.102 (4) | 0.066 (3) | −0.004 (3) | −0.014 (3) | −0.004 (3) |
C5 | 0.096 (4) | 0.122 (5) | 0.062 (3) | −0.019 (4) | −0.021 (3) | −0.015 (3) |
C6 | 0.129 (5) | 0.088 (4) | 0.067 (4) | −0.011 (4) | −0.006 (3) | −0.016 (3) |
C7 | 0.106 (4) | 0.058 (3) | 0.060 (3) | 0.008 (3) | 0.016 (3) | −0.011 (3) |
C8 | 0.054 (3) | 0.048 (3) | 0.052 (2) | 0.003 (2) | 0.003 (2) | 0.000 (2) |
C9 | 0.054 (3) | 0.069 (3) | 0.073 (3) | 0.015 (3) | 0.013 (3) | 0.015 (3) |
C10 | 0.047 (2) | 0.049 (3) | 0.055 (3) | 0.006 (2) | −0.003 (2) | 0.003 (2) |
C11 | 0.070 (3) | 0.101 (5) | 0.095 (4) | 0.042 (3) | 0.025 (3) | 0.002 (4) |
C12 | 0.050 (2) | 0.044 (2) | 0.051 (2) | 0.0060 (19) | 0.006 (2) | 0.004 (2) |
C13 | 0.045 (2) | 0.048 (2) | 0.046 (2) | −0.0029 (19) | 0.0030 (19) | −0.004 (2) |
C14 | 0.045 (2) | 0.067 (3) | 0.067 (3) | −0.001 (2) | 0.002 (2) | −0.003 (3) |
C15 | 0.069 (3) | 0.074 (4) | 0.059 (3) | −0.011 (3) | −0.012 (3) | −0.004 (3) |
C16 | 0.102 (4) | 0.064 (3) | 0.067 (3) | −0.014 (3) | −0.021 (3) | −0.009 (3) |
C17 | 0.084 (3) | 0.059 (3) | 0.055 (3) | 0.004 (3) | 0.020 (3) | −0.009 (2) |
S—C8 | 1.712 (4) | C4—C5 | 1.404 (8) |
S—C9 | 1.751 (6) | C4—H4A | 0.9300 |
O1—C2 | 1.360 (5) | C5—C6 | 1.354 (9) |
O1—C1 | 1.429 (6) | C5—H5A | 0.9300 |
O2—C10 | 1.226 (5) | C6—C7 | 1.343 (8) |
O3—C12 | 1.347 (5) | C6—H6A | 0.9300 |
O3—C11 | 1.436 (5) | C7—H7A | 0.9300 |
O4—H4 | 0.8501 | C10—C13 | 1.492 (6) |
N1—C9 | 1.329 (6) | C11—H11A | 0.9600 |
N1—N2 | 1.337 (5) | C11—H11B | 0.9600 |
N2—C8 | 1.271 (5) | C11—H11C | 0.9600 |
N3—C9 | 1.171 (6) | C12—C13 | 1.409 (6) |
N3—C10 | 1.464 (5) | C12—C17 | 1.411 (7) |
N3—H3A | 0.8600 | C13—C14 | 1.397 (6) |
C1—H1B | 0.9600 | C14—C15 | 1.374 (7) |
C1—H1C | 0.9600 | C14—H14A | 0.9300 |
C1—H1D | 0.9600 | C15—C16 | 1.364 (8) |
C2—C7 | 1.398 (7) | C15—H15A | 0.9300 |
C2—C3 | 1.404 (6) | C16—C17 | 1.361 (7) |
C3—C4 | 1.390 (6) | C16—H16A | 0.9300 |
C3—C8 | 1.472 (6) | C17—H17A | 0.9300 |
C8—S—C9 | 87.3 (2) | N2—C8—S | 113.1 (3) |
C2—O1—C1 | 118.8 (4) | C3—C8—S | 127.2 (3) |
C12—O3—C11 | 118.8 (4) | N3—C9—N1 | 120.5 (5) |
C9—N1—N2 | 111.7 (4) | N3—C9—S | 127.8 (4) |
C8—N2—N1 | 116.1 (4) | N1—C9—S | 111.7 (4) |
C9—N3—C10 | 130.6 (4) | O2—C10—N3 | 115.8 (4) |
C9—N3—H3A | 114.7 | O2—C10—C13 | 122.2 (4) |
C10—N3—H3A | 114.7 | N3—C10—C13 | 122.0 (4) |
O1—C1—H1B | 109.5 | O3—C11—H11A | 109.5 |
O1—C1—H1C | 109.5 | O3—C11—H11B | 109.5 |
H1B—C1—H1C | 109.5 | H11A—C11—H11B | 109.5 |
O1—C1—H1D | 109.5 | O3—C11—H11C | 109.5 |
H1B—C1—H1D | 109.5 | H11A—C11—H11C | 109.5 |
H1C—C1—H1D | 109.5 | H11B—C11—H11C | 109.5 |
O1—C2—C7 | 124.0 (5) | O3—C12—C13 | 117.3 (4) |
O1—C2—C3 | 116.0 (4) | O3—C12—C17 | 123.6 (4) |
C7—C2—C3 | 120.0 (5) | C13—C12—C17 | 119.0 (4) |
C4—C3—C2 | 118.5 (4) | C14—C13—C12 | 118.4 (4) |
C4—C3—C8 | 117.8 (4) | C14—C13—C10 | 116.0 (4) |
C2—C3—C8 | 123.7 (4) | C12—C13—C10 | 125.5 (4) |
C3—C4—C5 | 119.4 (6) | C15—C14—C13 | 121.8 (5) |
C3—C4—H4A | 120.3 | C15—C14—H14A | 119.1 |
C5—C4—H4A | 120.3 | C13—C14—H14A | 119.1 |
C6—C5—C4 | 120.7 (6) | C16—C15—C14 | 118.6 (5) |
C6—C5—H5A | 119.6 | C16—C15—H15A | 120.7 |
C4—C5—H5A | 119.6 | C14—C15—H15A | 120.7 |
C7—C6—C5 | 121.0 (6) | C17—C16—C15 | 122.8 (5) |
C7—C6—H6A | 119.5 | C17—C16—H16A | 118.6 |
C5—C6—H6A | 119.5 | C15—C16—H16A | 118.6 |
C6—C7—C2 | 120.4 (5) | C16—C17—C12 | 119.3 (5) |
C6—C7—H7A | 119.8 | C16—C17—H17A | 120.4 |
C2—C7—H7A | 119.8 | C12—C17—H17A | 120.4 |
N2—C8—C3 | 119.6 (4) | ||
C9—N1—N2—C8 | 1.8 (7) | N2—N1—C9—N3 | 177.2 (5) |
C1—O1—C2—C7 | 5.2 (7) | N2—N1—C9—S | −1.8 (6) |
C1—O1—C2—C3 | −174.9 (5) | C8—S—C9—N3 | −177.8 (5) |
O1—C2—C3—C4 | 179.6 (4) | C8—S—C9—N1 | 1.1 (4) |
C7—C2—C3—C4 | −0.5 (7) | C9—N3—C10—O2 | 2.0 (7) |
O1—C2—C3—C8 | −0.8 (7) | C9—N3—C10—C13 | −179.0 (5) |
C7—C2—C3—C8 | 179.1 (4) | C11—O3—C12—C13 | 176.9 (4) |
C2—C3—C4—C5 | 2.2 (8) | C11—O3—C12—C17 | −2.3 (7) |
C8—C3—C4—C5 | −177.4 (5) | O3—C12—C13—C14 | −178.2 (4) |
C3—C4—C5—C6 | −3.0 (10) | C17—C12—C13—C14 | 1.0 (6) |
C4—C5—C6—C7 | 2.0 (11) | O3—C12—C13—C10 | 1.1 (6) |
C5—C6—C7—C2 | −0.3 (10) | C17—C12—C13—C10 | −179.7 (4) |
O1—C2—C7—C6 | 179.4 (5) | O2—C10—C13—C14 | −2.1 (7) |
C3—C2—C7—C6 | −0.5 (8) | N3—C10—C13—C14 | 179.0 (4) |
N1—N2—C8—C3 | 178.5 (4) | O2—C10—C13—C12 | 178.6 (4) |
N1—N2—C8—S | −0.9 (6) | N3—C10—C13—C12 | −0.3 (7) |
C4—C3—C8—N2 | −2.9 (7) | C12—C13—C14—C15 | −1.3 (7) |
C2—C3—C8—N2 | 177.5 (5) | C10—C13—C14—C15 | 179.3 (4) |
C4—C3—C8—S | 176.4 (4) | C13—C14—C15—C16 | −0.7 (8) |
C2—C3—C8—S | −3.2 (7) | C14—C15—C16—C17 | 3.1 (9) |
C9—S—C8—N2 | −0.2 (4) | C15—C16—C17—C12 | −3.5 (8) |
C9—S—C8—C3 | −179.5 (4) | O3—C12—C17—C16 | −179.5 (4) |
C10—N3—C9—N1 | −179.7 (4) | C13—C12—C17—C16 | 1.3 (7) |
C10—N3—C9—S | −0.9 (8) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3A···O3 | 0.86 | 2.04 | 2.706 (5) | 134 |
O4—H4···N1i | 0.85 | 2.24 | 2.796 (6) | 123 |
C14—H14A···O2ii | 0.93 | 2.49 | 3.316 (6) | 148 |
Symmetry codes: (i) −x+1, y, −z+1/2; (ii) −x+1/2, −y+1/2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C17H15N3O3S·0.5H2O |
Mr | 350.40 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 298 |
a, b, c (Å) | 29.950 (6), 14.561 (3), 7.6520 (15) |
β (°) | 94.78 (3) |
V (Å3) | 3325.4 (12) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.22 |
Crystal size (mm) | 0.30 × 0.10 × 0.05 |
Data collection | |
Diffractometer | Enraf–Nonius CAD-4 diffractometer |
Absorption correction | ψ scan (North et al., 1968) |
Tmin, Tmax | 0.937, 0.989 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6340, 3003, 1602 |
Rint | 0.061 |
(sin θ/λ)max (Å−1) | 0.600 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.079, 0.241, 1.04 |
No. of reflections | 3003 |
No. of parameters | 222 |
No. of restraints | ? |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.57, −0.33 |
Computer programs: CAD-4 Software (Enraf–Nonius, 1989), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2003), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3A···O3 | 0.86 | 2.04 | 2.706 (5) | 134.00 |
O4—H4···N1i | 0.85 | 2.24 | 2.796 (6) | 123.00 |
C14—H14A···O2ii | 0.93 | 2.49 | 3.316 (6) | 148.00 |
Symmetry codes: (i) −x+1, y, −z+1/2; (ii) −x+1/2, −y+1/2, −z+1. |
Acknowledgements
The authors gratefully acknowledge Professor Hua-qin Wang, Analysis Centre, Nanjing University, for providing diffractometer time.
References
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1,3,4-Thiadiazole derivatives represent an interesting class of compounds possessing broad spectrum biological activities (Nakagawa et al., 1996; Wang et al., 1999). These compounds are known to exhibit diverse biological effects, such as insecticidal and fungicidal activities (Wang et al., 1999). We report herein the crystal structure of the title compound.
In the molecule of the title compound (Fig. 1) the bond lengths and angles are within normal ranges. Rings A (C2-C7), B (S/N1/N2/C8/C9) and C (C12-C17) are, of course, planar. The intramolecular N-H···O hydrogen bond (Table 1) results in the formation of a six-membered planar ring D (N3/H3A/O3/C10/C12/C13). The dihedral angles between the rings are A/B = 3.70 (3)°, A/C = 2.81 (3)°, A/D = 2.45 (3)°, B/C = 1.74 (2)°, B/D = 1.33 (3)° and C/D = 0.90 (3)°. So, all of the rings are nearly coplanar.
In the crystal structure, intermolecular O-H···N and C-H···O hydrogen bonds (Table 1) link the molecules (Fig. 2), in which they may be effective in the stabilization of the structure.