organic compounds
8-[(Hydrazinylidene)methyl]-4-methyl-2-oxo-2H-chromen-7-yl 4-methylbenzenesulfonate
aSchool of Display and Chemical Engineering, Yeungnam University, Gyeongsan, Gyeoungbuk 712-749, Republic of Korea, bInstitute of Structural Biology and Biophysics-2: Molecular Biophysics, Research Centre Jülich, D-52425 Jülich, Germany, cDepartment of Chemistry, Karnatak University's Karnatak Science College, Dharwad 580 001, Karnataka, India, and dDepartment of Chemistry, B. K. College, Belgaum 590 001, Karnataka, India
*Correspondence e-mail: yuvraj_pd@yahoo.co.in
In the title compound, C18H16N2O5S, the coumarin ring system is nearly planar, with a maximum out-of-plane deviation of 0.078 (1) Å (r.m.s. deviation = 0.046 Å). The dihedral angle between the coumarin ring system and the toluene ring (r.m.s. deviation = 0.004 Å) is 2.77 (1)°. The crystal packing is stabilized by C—H⋯O and N—H⋯O intermolecular hydrogen bonds generating C(8), C(9) and C(11) chains and R22(14), R22(23) and R43(13) ring graph sets.
Related literature
For the biological activity of et al. (2006); Kalkhambkar et al. (2008); Laakso et al. (1994); Nofal et al. (2000). For related structures, see: Kokila et al. (1995); Vasudevan et al. (1990). For graph-set analysis of hydrogen-bond patterns, see: Bernstein et al. (1995).
see: KulkarniExperimental
Crystal data
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Data collection
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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: PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PARST (Nardelli, 1995).
Supporting information
10.1107/S1600536810054620/si2319sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810054620/si2319Isup2.hkl
A mixture of toluene-4-sulfonicacid-8-formyl-4-methyl-2-oxo-2H-chromen- 7-ylester (6 mmol), and hydrazine hydrate (6 mmol) in 20 ml of ethanol- acetic acid mixture (2:1) was refluxed on water bath for 6 h. Once the reaction was over, the excess of solvent was removed under reduced pressure and filtered the separated solids. The solids were then washed with excess of cold water, dried and crystallized from ethanol and dioxan mixture. Yield: 78%; Colorless crystalline solid (ethanol); mp 160–162 °C; Rf 0.66 (benzene); IR (KBr) cm-1 3405, 1724, 1627, 1341; 1H NMR (CDCl3 + TFA) δ 2.37 (3H, s), 2.54 (3H, s), 6.47 (1H, s), 7.34 (2H, s), 7.47 (6H, m), 8.68 (1H, s); Anal.Calc.for C18H16N2O5S: C, 58.05; H, 4.33; N, 7.52; Found: C, 57.91; H, 4.20; N, 7.27.
All H-atoms were refined using a riding model with d(C—H) = 0.93 Å, Uiso = 1.2Ueq (C) for aromatic CH, 0.96 Å, Uiso = 1.5Ueq (C) for CH3 and 0.86 Å, Uiso = 1.2Ueq (N) for NH2 atom.
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: PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PARST (Nardelli, 1995).C18H16N2O5S | F(000) = 776 |
Mr = 372.39 | Dx = 1.447 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 7131 reflections |
a = 9.1947 (3) Å | θ = 2.2–27.3° |
b = 16.1867 (4) Å | µ = 0.22 mm−1 |
c = 11.6538 (3) Å | T = 293 K |
β = 99.670 (1)° | Plate, colorless |
V = 1709.81 (8) Å3 | 0.2 × 0.19 × 0.19 mm |
Z = 4 |
Bruker SMART CCD area-detector diffractometer | 3285 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.033 |
Graphite monochromator | θmax = 28.3°, θmin = 2.2° |
phi and ω scans | h = −12→12 |
26334 measured reflections | k = −21→21 |
4260 independent reflections | l = −15→15 |
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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.116 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0548P)2 + 0.5733P] where P = (Fo2 + 2Fc2)/3 |
4260 reflections | (Δ/σ)max = 0.001 |
237 parameters | Δρmax = 0.35 e Å−3 |
0 restraints | Δρmin = −0.40 e Å−3 |
C18H16N2O5S | V = 1709.81 (8) Å3 |
Mr = 372.39 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 9.1947 (3) Å | µ = 0.22 mm−1 |
b = 16.1867 (4) Å | T = 293 K |
c = 11.6538 (3) Å | 0.2 × 0.19 × 0.19 mm |
β = 99.670 (1)° |
Bruker SMART CCD area-detector diffractometer | 3285 reflections with I > 2σ(I) |
26334 measured reflections | Rint = 0.033 |
4260 independent reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.116 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.35 e Å−3 |
4260 reflections | Δρmin = −0.40 e Å−3 |
237 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 | ||
S1 | 0.87241 (5) | 0.20073 (3) | 0.74789 (4) | 0.04805 (14) | |
O2 | 0.40215 (11) | −0.02903 (6) | 0.69872 (10) | 0.0400 (3) | |
O3 | 0.83056 (11) | 0.12613 (6) | 0.65832 (10) | 0.0381 (3) | |
O1 | 0.21065 (13) | −0.09419 (7) | 0.74469 (14) | 0.0591 (4) | |
O4 | 0.78108 (16) | 0.19431 (11) | 0.83435 (14) | 0.0793 (5) | |
O5 | 0.86864 (16) | 0.27548 (8) | 0.68331 (17) | 0.0777 (5) | |
C11 | 0.70098 (16) | −0.02353 (9) | 0.74255 (14) | 0.0371 (3) | |
H11 | 0.6508 | −0.0599 | 0.7837 | 0.045* | |
C7 | 0.61790 (16) | 0.04122 (9) | 0.67270 (13) | 0.0330 (3) | |
C8 | 0.67779 (16) | 0.11089 (9) | 0.62748 (13) | 0.0357 (3) | |
C5 | 0.37380 (16) | 0.09308 (9) | 0.57881 (13) | 0.0355 (3) | |
C6 | 0.46285 (16) | 0.03608 (9) | 0.64762 (13) | 0.0331 (3) | |
C12 | 1.05418 (18) | 0.17468 (10) | 0.80513 (14) | 0.0409 (4) | |
C17 | 1.3108 (2) | 0.20553 (11) | 0.83220 (17) | 0.0488 (4) | |
H17 | 1.3876 | 0.2392 | 0.8175 | 0.059* | |
C2 | 0.15966 (17) | 0.02146 (10) | 0.62033 (15) | 0.0416 (4) | |
H2 | 0.0578 | 0.0161 | 0.6127 | 0.050* | |
C9 | 0.59404 (19) | 0.16704 (11) | 0.55527 (15) | 0.0457 (4) | |
H9 | 0.6394 | 0.2107 | 0.5234 | 0.055* | |
C1 | 0.25173 (17) | −0.03775 (10) | 0.69100 (16) | 0.0417 (4) | |
C4 | 0.11620 (19) | 0.14562 (12) | 0.49470 (15) | 0.0484 (4) | |
H4A | 0.0150 | 0.1316 | 0.4958 | 0.073* | |
H4B | 0.1342 | 0.1451 | 0.4159 | 0.073* | |
H4C | 0.1363 | 0.1997 | 0.5272 | 0.073* | |
C3 | 0.21464 (17) | 0.08395 (10) | 0.56514 (14) | 0.0377 (3) | |
C10 | 0.44325 (19) | 0.15798 (11) | 0.53077 (15) | 0.0460 (4) | |
H10 | 0.3870 | 0.1955 | 0.4817 | 0.055* | |
C18 | 1.16766 (19) | 0.22511 (11) | 0.78238 (16) | 0.0453 (4) | |
H18 | 1.1480 | 0.2712 | 0.7346 | 0.054* | |
C14 | 1.2259 (2) | 0.08804 (12) | 0.92495 (17) | 0.0524 (4) | |
H14 | 1.2454 | 0.0419 | 0.9725 | 0.063* | |
C13 | 1.0825 (2) | 0.10645 (12) | 0.87741 (16) | 0.0500 (4) | |
H13 | 1.0054 | 0.0736 | 0.8935 | 0.060* | |
C15 | 1.34283 (19) | 0.13723 (11) | 0.90328 (16) | 0.0468 (4) | |
C16 | 1.4988 (2) | 0.11716 (14) | 0.9572 (2) | 0.0643 (5) | |
H16A | 1.5640 | 0.1583 | 0.9351 | 0.096* | |
H16B | 1.5251 | 0.0640 | 0.9306 | 0.096* | |
H16C | 1.5070 | 0.1164 | 1.0404 | 0.096* | |
N1 | 0.83982 (14) | −0.03170 (8) | 0.74886 (13) | 0.0411 (3) | |
N2 | 0.90695 (16) | −0.09370 (10) | 0.81607 (14) | 0.0519 (4) | |
H2A | 0.8559 | −0.1258 | 0.8526 | 0.062* | |
H2B | 1.0006 | −0.1009 | 0.8222 | 0.062* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0384 (2) | 0.0402 (2) | 0.0663 (3) | −0.00432 (16) | 0.01104 (19) | −0.01826 (19) |
O2 | 0.0273 (5) | 0.0324 (5) | 0.0604 (7) | 0.0000 (4) | 0.0079 (5) | 0.0048 (5) |
O3 | 0.0329 (5) | 0.0358 (6) | 0.0473 (6) | −0.0059 (4) | 0.0112 (4) | −0.0073 (5) |
O1 | 0.0357 (6) | 0.0406 (7) | 0.1039 (11) | −0.0001 (5) | 0.0202 (7) | 0.0154 (7) |
O4 | 0.0507 (8) | 0.1124 (13) | 0.0803 (10) | −0.0143 (8) | 0.0272 (8) | −0.0508 (10) |
O5 | 0.0566 (9) | 0.0329 (7) | 0.1361 (15) | −0.0016 (6) | −0.0055 (9) | 0.0022 (8) |
C11 | 0.0309 (7) | 0.0354 (8) | 0.0459 (8) | −0.0009 (6) | 0.0084 (6) | 0.0008 (6) |
C7 | 0.0311 (7) | 0.0332 (7) | 0.0355 (7) | −0.0003 (5) | 0.0076 (6) | −0.0050 (6) |
C8 | 0.0311 (7) | 0.0372 (7) | 0.0397 (8) | −0.0035 (6) | 0.0084 (6) | −0.0034 (6) |
C5 | 0.0339 (7) | 0.0374 (8) | 0.0352 (7) | 0.0020 (6) | 0.0052 (6) | −0.0027 (6) |
C6 | 0.0322 (7) | 0.0306 (7) | 0.0374 (7) | −0.0006 (5) | 0.0085 (6) | −0.0039 (6) |
C12 | 0.0398 (8) | 0.0394 (8) | 0.0445 (8) | −0.0087 (6) | 0.0099 (7) | −0.0108 (7) |
C17 | 0.0415 (9) | 0.0480 (9) | 0.0580 (10) | −0.0150 (7) | 0.0116 (8) | −0.0064 (8) |
C2 | 0.0280 (7) | 0.0410 (8) | 0.0547 (10) | 0.0021 (6) | 0.0036 (7) | −0.0080 (7) |
C9 | 0.0455 (9) | 0.0460 (9) | 0.0467 (9) | −0.0046 (7) | 0.0107 (7) | 0.0116 (7) |
C1 | 0.0297 (7) | 0.0334 (8) | 0.0632 (10) | −0.0006 (6) | 0.0113 (7) | −0.0047 (7) |
C4 | 0.0412 (9) | 0.0561 (10) | 0.0459 (9) | 0.0102 (8) | 0.0012 (7) | 0.0019 (8) |
C3 | 0.0340 (7) | 0.0396 (8) | 0.0381 (8) | 0.0050 (6) | 0.0024 (6) | −0.0083 (6) |
C10 | 0.0442 (9) | 0.0485 (10) | 0.0442 (9) | 0.0033 (7) | 0.0040 (7) | 0.0109 (7) |
C18 | 0.0466 (9) | 0.0379 (8) | 0.0518 (10) | −0.0106 (7) | 0.0093 (7) | −0.0047 (7) |
C14 | 0.0549 (11) | 0.0502 (10) | 0.0505 (10) | −0.0092 (8) | 0.0040 (8) | 0.0042 (8) |
C13 | 0.0498 (10) | 0.0508 (10) | 0.0505 (10) | −0.0173 (8) | 0.0116 (8) | −0.0010 (8) |
C15 | 0.0433 (9) | 0.0492 (10) | 0.0481 (9) | −0.0063 (7) | 0.0079 (7) | −0.0097 (7) |
C16 | 0.0479 (11) | 0.0686 (13) | 0.0739 (14) | −0.0012 (9) | 0.0030 (10) | −0.0027 (11) |
N1 | 0.0321 (6) | 0.0398 (7) | 0.0513 (8) | 0.0020 (5) | 0.0070 (6) | 0.0035 (6) |
N2 | 0.0338 (7) | 0.0548 (9) | 0.0668 (10) | 0.0064 (6) | 0.0074 (7) | 0.0177 (7) |
S1—O4 | 1.4197 (15) | C2—C3 | 1.342 (2) |
S1—O5 | 1.4222 (16) | C2—C1 | 1.442 (2) |
S1—O3 | 1.6003 (11) | C2—H2 | 0.9300 |
S1—C12 | 1.7441 (17) | C9—C10 | 1.376 (2) |
O2—C6 | 1.3742 (18) | C9—H9 | 0.9300 |
O2—C1 | 1.3781 (18) | C4—C3 | 1.497 (2) |
O3—C8 | 1.4119 (18) | C4—H4A | 0.9600 |
O1—C1 | 1.203 (2) | C4—H4B | 0.9600 |
C11—N1 | 1.2732 (19) | C4—H4C | 0.9600 |
C11—C7 | 1.461 (2) | C10—H10 | 0.9300 |
C11—H11 | 0.9300 | C18—H18 | 0.9300 |
C7—C8 | 1.397 (2) | C14—C13 | 1.374 (3) |
C7—C6 | 1.409 (2) | C14—C15 | 1.395 (2) |
C8—C9 | 1.382 (2) | C14—H14 | 0.9300 |
C5—C6 | 1.394 (2) | C13—H13 | 0.9300 |
C5—C10 | 1.395 (2) | C15—C16 | 1.501 (3) |
C5—C3 | 1.453 (2) | C16—H16A | 0.9600 |
C12—C18 | 1.385 (2) | C16—H16B | 0.9600 |
C12—C13 | 1.387 (2) | C16—H16C | 0.9600 |
C17—C15 | 1.383 (3) | N1—N2 | 1.3561 (19) |
C17—C18 | 1.384 (3) | N2—H2A | 0.8600 |
C17—H17 | 0.9300 | N2—H2B | 0.8600 |
O4—S1—O5 | 118.24 (11) | O1—C1—C2 | 126.59 (15) |
O4—S1—O3 | 107.55 (8) | O2—C1—C2 | 117.10 (14) |
O5—S1—O3 | 108.36 (9) | C3—C4—H4A | 109.5 |
O4—S1—C12 | 110.73 (10) | C3—C4—H4B | 109.5 |
O5—S1—C12 | 110.17 (9) | H4A—C4—H4B | 109.5 |
O3—S1—C12 | 100.20 (7) | C3—C4—H4C | 109.5 |
C6—O2—C1 | 121.77 (12) | H4A—C4—H4C | 109.5 |
C8—O3—S1 | 114.70 (9) | H4B—C4—H4C | 109.5 |
N1—C11—C7 | 122.14 (14) | C2—C3—C5 | 118.53 (14) |
N1—C11—H11 | 118.9 | C2—C3—C4 | 121.58 (15) |
C7—C11—H11 | 118.9 | C5—C3—C4 | 119.84 (15) |
C8—C7—C6 | 114.76 (13) | C9—C10—C5 | 120.70 (15) |
C8—C7—C11 | 125.94 (13) | C9—C10—H10 | 119.7 |
C6—C7—C11 | 119.30 (13) | C5—C10—H10 | 119.7 |
C9—C8—C7 | 123.11 (14) | C17—C18—C12 | 118.61 (17) |
C9—C8—O3 | 117.97 (13) | C17—C18—H18 | 120.7 |
C7—C8—O3 | 118.91 (13) | C12—C18—H18 | 120.7 |
C6—C5—C10 | 117.71 (14) | C13—C14—C15 | 121.31 (18) |
C6—C5—C3 | 118.63 (14) | C13—C14—H14 | 119.3 |
C10—C5—C3 | 123.60 (14) | C15—C14—H14 | 119.3 |
O2—C6—C5 | 120.98 (13) | C14—C13—C12 | 119.15 (16) |
O2—C6—C7 | 115.20 (13) | C14—C13—H13 | 120.4 |
C5—C6—C7 | 123.80 (14) | C12—C13—H13 | 120.4 |
C18—C12—C13 | 121.00 (16) | C17—C15—C14 | 118.17 (17) |
C18—C12—S1 | 119.25 (14) | C17—C15—C16 | 121.05 (17) |
C13—C12—S1 | 119.67 (13) | C14—C15—C16 | 120.78 (18) |
C15—C17—C18 | 121.75 (16) | C15—C16—H16A | 109.5 |
C15—C17—H17 | 119.1 | C15—C16—H16B | 109.5 |
C18—C17—H17 | 119.1 | H16A—C16—H16B | 109.5 |
C3—C2—C1 | 122.85 (14) | C15—C16—H16C | 109.5 |
C3—C2—H2 | 118.6 | H16A—C16—H16C | 109.5 |
C1—C2—H2 | 118.6 | H16B—C16—H16C | 109.5 |
C10—C9—C8 | 119.70 (15) | C11—N1—N2 | 117.71 (14) |
C10—C9—H9 | 120.2 | N1—N2—H2A | 120.0 |
C8—C9—H9 | 120.2 | N1—N2—H2B | 120.0 |
O1—C1—O2 | 116.30 (15) | H2A—N2—H2B | 120.0 |
O4—S1—O3—C8 | 42.38 (14) | C7—C8—C9—C10 | 3.9 (3) |
O5—S1—O3—C8 | −86.51 (12) | O3—C8—C9—C10 | −174.80 (15) |
C12—S1—O3—C8 | 158.10 (11) | C6—O2—C1—O1 | −175.70 (15) |
N1—C11—C7—C8 | −15.2 (2) | C6—O2—C1—C2 | 4.0 (2) |
N1—C11—C7—C6 | 165.64 (15) | C3—C2—C1—O1 | 178.45 (18) |
C6—C7—C8—C9 | −5.4 (2) | C3—C2—C1—O2 | −1.2 (2) |
C11—C7—C8—C9 | 175.39 (15) | C1—C2—C3—C5 | −1.0 (2) |
C6—C7—C8—O3 | 173.29 (13) | C1—C2—C3—C4 | −178.52 (15) |
C11—C7—C8—O3 | −5.9 (2) | C6—C5—C3—C2 | 0.7 (2) |
S1—O3—C8—C9 | 72.10 (16) | C10—C5—C3—C2 | −176.51 (16) |
S1—O3—C8—C7 | −106.67 (13) | C6—C5—C3—C4 | 178.20 (14) |
C1—O2—C6—C5 | −4.5 (2) | C10—C5—C3—C4 | 1.0 (2) |
C1—O2—C6—C7 | 173.91 (13) | C8—C9—C10—C5 | 0.5 (3) |
C10—C5—C6—O2 | 179.38 (14) | C6—C5—C10—C9 | −2.9 (2) |
C3—C5—C6—O2 | 2.0 (2) | C3—C5—C10—C9 | 174.32 (16) |
C10—C5—C6—C7 | 1.1 (2) | C15—C17—C18—C12 | 0.2 (3) |
C3—C5—C6—C7 | −176.24 (14) | C13—C12—C18—C17 | 0.8 (3) |
C8—C7—C6—O2 | −175.49 (13) | S1—C12—C18—C17 | 177.42 (13) |
C11—C7—C6—O2 | 3.8 (2) | C15—C14—C13—C12 | 1.0 (3) |
C8—C7—C6—C5 | 2.9 (2) | C18—C12—C13—C14 | −1.3 (3) |
C11—C7—C6—C5 | −177.88 (14) | S1—C12—C13—C14 | −177.96 (14) |
O4—S1—C12—C18 | −133.39 (14) | C18—C17—C15—C14 | −0.5 (3) |
O5—S1—C12—C18 | −0.71 (17) | C18—C17—C15—C16 | −179.64 (18) |
O3—S1—C12—C18 | 113.30 (14) | C13—C14—C15—C17 | 0.0 (3) |
O4—S1—C12—C13 | 43.30 (17) | C13—C14—C15—C16 | 179.07 (19) |
O5—S1—C12—C13 | 175.97 (14) | C7—C11—N1—N2 | 179.96 (14) |
O3—S1—C12—C13 | −70.01 (14) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2A···O5i | 0.86 | 2.59 | 3.303 (2) | 141 |
N2—H2B···O1ii | 0.86 | 2.27 | 3.045 (2) | 150 |
C10—H10···O4iii | 0.93 | 2.55 | 3.469 (2) | 169 |
C16—H16A···O4ii | 0.96 | 2.55 | 3.405 (3) | 149 |
C18—H18···O1iv | 0.93 | 2.53 | 3.166 (2) | 126 |
Symmetry codes: (i) −x+3/2, y−1/2, −z+3/2; (ii) x+1, y, z; (iii) x−1/2, −y+1/2, z−1/2; (iv) −x+3/2, y+1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C18H16N2O5S |
Mr | 372.39 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 9.1947 (3), 16.1867 (4), 11.6538 (3) |
β (°) | 99.670 (1) |
V (Å3) | 1709.81 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.22 |
Crystal size (mm) | 0.2 × 0.19 × 0.19 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 26334, 4260, 3285 |
Rint | 0.033 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.116, 1.04 |
No. of reflections | 4260 |
No. of parameters | 237 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.35, −0.40 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009), WinGX (Farrugia, 1999) and PARST (Nardelli, 1995).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2A···O5i | 0.86 | 2.59 | 3.303 (2) | 141 |
N2—H2B···O1ii | 0.86 | 2.27 | 3.045 (2) | 150 |
C10—H10···O4iii | 0.93 | 2.55 | 3.469 (2) | 169 |
C16—H16A···O4ii | 0.96 | 2.55 | 3.405 (3) | 149 |
C18—H18···O1iv | 0.93 | 2.53 | 3.166 (2) | 126 |
Symmetry codes: (i) −x+3/2, y−1/2, −z+3/2; (ii) x+1, y, z; (iii) x−1/2, −y+1/2, z−1/2; (iv) −x+3/2, y+1/2, −z+3/2. |
Acknowledgements
HY acknowledges Yeungnam University for the opportunity to work as a Full-Time Foreign Instructor.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Coumarins represent a group of naturally occurring lactones, whose potential as anti-inflammatory, anti-microbial, anticancer and protease inhibiting agents has recently been reviewed (Kulkarni et al., 2006). Coumarin derivatives with various substituents at the C-4 position with their biological activities have been reported from our laboratory (Kalkhambkar et al., 2008). Many natural coumarins are reported for their wide range of biological and antitumor properties (Nofal et al., 2000). Solid-state conformations of 4-aryloxymethyl and 4-aryl aminomethyl coumarins have been found to be significantly different. The former exhibits a centro-symmetric nature (Vasudevan et al., 1990) in the solid state, whereas the latter have been found to exhibit a layer like structure stabilized by inter molecular hydrogen bonds (Kokila et al., 1995). In view of biological importance of coumarin we synthesized the title compound and report here its structure.
The molecular structure of the title compound is shown in Fig.1. The coumarin ring system is nearly planar with a maximum out-of-plane deviation of 0.078 (1) Å (r.m.s. deviation = 0.046 Å). The dihedral angle between the coumarin ring system and the toluene ring (r.m.s. deviation = 0.004 Å) is 2.77 (1)°. Atoms O1 and C4 lie 0.066 (2) and 0.005 (2) Å, respectively, below the least-squares plane of the atoms (C1/C2/C3/C5/C6/O2). Atom C16 lies -0.008 (2) Å from the least-squares plane of the ring to which it is attached. Torsion angle C8—C7—C11—N1 (-15.2 (2)°) indicates slight deviation of hydrazonomethyl group from the plane of benzo-ring in coumarin moeity.
The crystal packing is stabilized by N—H···O and C—H···O intermolecular hydrogen bonds. N2—H2A···O5i, C18—H18···O1iv; N2—H2B···O1ii, C16—H16A···O4ii generate chains of C(9), C(11) {along [010]}; C(9), C(8) {along [100]}, respectively. These intermolecular hydrogen bonds, in turn, generate R22(14), R22(23) and R43(13) graph sets (Bernstein et al., 1995) (Table 1, Fig. 2). The crystal packing is further stabilized by C10—H10···O4iii intermolecular hydrogen bond generating C(8) chain along ac plane. The glide plane symmetry operation and translation along the a axis link the molecules into a three-dimensional network via intermolecular hydrogen bonds (Fig. 3).