organic compounds
2-(Mesitylmethylsulfanyl)pyridine N-oxide–18-crown-6 (2/1)
aDepartment of Chemistry, Popes College, Sawyerpuram 628 251, Tamil Nadu, India, bDepartment of Physics, Karunya University, Karunya Nagar, Coimbatore 641 114, India, cDepartment of Physics, Popes College, Sawyerpuram 628 251, Tamilnadu, India, and dInstitut für Organische Chemie, Universität Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
*Correspondence e-mail: b_ravidurai@yahoo.com
In the title compound, 2C15H17NOS·C12H24O6, the consists of one N-oxide derivative and one-half of the 18-crown-6 ether, which lies on an inversion centre. In the crown ether, the O—C—C—O torsion angles indicate a gauche conformation of the ethyleneoxy units, while the C—O—C—C torsion angles indicate planarity of these segments. In the N-oxide unit, the dihedral angle between the pyridine and benzene rings is 85.88 (12)°. The crystal packing is stabilized by weak C—H⋯O hydrogen bonds and C—H⋯π interactions.
Related literature
For bond-length data, see: Allen et al. (1987). For the biological activities of N-oxide derivatives, see: Bovin et al.(1992); Katsuyuki et al.(1991); Leonard et al.(1955); Lobana & Bhatia (1989); Symons & West (1985). For related structures, see: Jebas et al.(2005); Ravindran Durai Nayagam et al. (2008).
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: CAD-4 Software; 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/S1600536808012403/ci2589sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808012403/ci2589Isup2.hkl
A mixture of mono(bromomethyl)mesitylene (0.213 g, 1 mmol), 1-hydroxypyridine-2-thione sodium salt (0.1491 mmol) and 18-crown-6-ether (0.250 g) in water (30 ml) and methanol (30 ml) was heated at 333 K with stirring for 30 min. The compound formed was filtered off and dried. The compound was recrystallized from a chloroform-methanol (1:1 v/v) solution.
H atoms were positioned geometrically [C-H = 0.93 (aromatic), 0.96 Å (methyl) and 0.97 Å (methylene)] and refined using a riding model, with Uiso(H) = 1.2-1.5Ueq(C).
Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell
CAD-4 Software (Enraf–Nonius, 1989); data reduction: CAD-4 Software (Enraf–Nonius, 1989); 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. The molecular structure of the title compound, showing 50% probability displacement ellipsoids and the atomic numbering scheme. Atoms labelled with the suffix A are generated by the symmetry operation (-x, 1-y, 1-z). | |
Fig. 2. The crystal packing of the title compound, viewed along the a axis. Hydrogen bonds are shown as dashed lines. |
2C15H17NOS·C12H24O6 | F(000) = 840 |
Mr = 783.02 | Dx = 1.233 Mg m−3 |
Monoclinic, P21/c | Cu Kα radiation, λ = 1.54178 Å |
Hall symbol: -P 2ybc | Cell parameters from 25 reflections |
a = 8.050 (2) Å | θ = 26–41° |
b = 18.1903 (18) Å | µ = 1.57 mm−1 |
c = 14.424 (4) Å | T = 298 K |
β = 93.475 (14)° | Block, colourless |
V = 2108.3 (8) Å3 | 0.26 × 0.22 × 0.19 mm |
Z = 2 |
Enraf–Nonius CAD-4 diffractometer | 2846 reflections with I > 2σ(I) |
Radiation source: rotating anode | Rint = 0 |
Graphite monochromator | θmax = 70.1°, θmin = 3.9° |
ω/2θ scans | h = 0→9 |
Absorption correction: ψ scan (North et al., 1968) | k = 0→22 |
Tmin = 0.95, Tmax = 0.99 | l = −17→17 |
3999 measured reflections | 3 standard reflections every 60 min |
3999 independent reflections | intensity decay: 3% |
Refinement on F2 | 0 restraints |
Least-squares matrix: full | H-atom parameters constrained |
R[F2 > 2σ(F2)] = 0.049 | w = 1/[σ2(Fo2) + (0.0563P)2 + 0.3138P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.132 | (Δ/σ)max < 0.001 |
S = 1.03 | Δρmax = 0.21 e Å−3 |
3999 reflections | Δρmin = −0.25 e Å−3 |
247 parameters |
2C15H17NOS·C12H24O6 | V = 2108.3 (8) Å3 |
Mr = 783.02 | Z = 2 |
Monoclinic, P21/c | Cu Kα radiation |
a = 8.050 (2) Å | µ = 1.57 mm−1 |
b = 18.1903 (18) Å | T = 298 K |
c = 14.424 (4) Å | 0.26 × 0.22 × 0.19 mm |
β = 93.475 (14)° |
Enraf–Nonius CAD-4 diffractometer | 2846 reflections with I > 2σ(I) |
Absorption correction: ψ scan (North et al., 1968) | Rint = 0 |
Tmin = 0.95, Tmax = 0.99 | 3 standard reflections every 60 min |
3999 measured reflections | intensity decay: 3% |
3999 independent reflections |
R[F2 > 2σ(F2)] = 0.049 | 0 restraints |
wR(F2) = 0.132 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.21 e Å−3 |
3999 reflections | Δρmin = −0.25 e Å−3 |
247 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. |
x | y | z | Uiso*/Ueq | ||
C1 | 0.7135 (3) | 0.08450 (12) | 0.27904 (15) | 0.0427 (5) | |
C2 | 0.7560 (3) | 0.01163 (13) | 0.29202 (16) | 0.0478 (6) | |
H2 | 0.7162 | −0.0144 | 0.3415 | 0.057* | |
C3 | 0.8569 (3) | −0.02246 (14) | 0.23183 (18) | 0.0571 (7) | |
H3 | 0.8865 | −0.0715 | 0.2411 | 0.069* | |
C4 | 0.9142 (4) | 0.01540 (15) | 0.1584 (2) | 0.0637 (7) | |
H4 | 0.9813 | −0.0077 | 0.1169 | 0.076* | |
C5 | 0.8717 (3) | 0.08740 (16) | 0.1468 (2) | 0.0637 (7) | |
H5 | 0.9106 | 0.1134 | 0.097 | 0.076* | |
N6 | 0.7742 (3) | 0.12176 (11) | 0.20600 (15) | 0.0532 (5) | |
O7 | 0.7329 (3) | 0.19062 (10) | 0.19510 (16) | 0.0837 (7) | |
S8 | 0.58479 (9) | 0.13969 (3) | 0.34265 (5) | 0.0552 (2) | |
C9 | 0.5267 (3) | 0.07413 (12) | 0.43059 (17) | 0.0498 (6) | |
H9A | 0.4587 | 0.0353 | 0.402 | 0.06* | |
H9B | 0.6256 | 0.0521 | 0.4606 | 0.06* | |
C10 | 0.4303 (3) | 0.11466 (12) | 0.50103 (16) | 0.0437 (5) | |
C11 | 0.5156 (3) | 0.15214 (12) | 0.57329 (17) | 0.0459 (5) | |
C12 | 0.4274 (3) | 0.19058 (13) | 0.63763 (17) | 0.0502 (6) | |
H12 | 0.4853 | 0.2164 | 0.6849 | 0.06* | |
C13 | 0.2556 (3) | 0.19120 (13) | 0.63282 (17) | 0.0494 (6) | |
C14 | 0.1730 (3) | 0.15298 (13) | 0.56197 (18) | 0.0510 (6) | |
H14 | 0.0573 | 0.1521 | 0.5591 | 0.061* | |
C15 | 0.2554 (3) | 0.11556 (13) | 0.49443 (17) | 0.0481 (6) | |
C16 | 0.7035 (3) | 0.15389 (16) | 0.5834 (2) | 0.0643 (7) | |
H16A | 0.7387 | 0.1898 | 0.6292 | 0.096* | |
H16B | 0.7466 | 0.1666 | 0.5249 | 0.096* | |
H16C | 0.7444 | 0.1063 | 0.6025 | 0.096* | |
C17 | 0.1631 (4) | 0.23629 (17) | 0.7009 (2) | 0.0729 (9) | |
H17A | 0.2288 | 0.2399 | 0.7585 | 0.109* | |
H17B | 0.059 | 0.213 | 0.7115 | 0.109* | |
H17C | 0.1428 | 0.2846 | 0.6759 | 0.109* | |
C18 | 0.1546 (4) | 0.07817 (17) | 0.4161 (2) | 0.0760 (9) | |
H18A | 0.1669 | 0.0258 | 0.4218 | 0.114* | |
H18B | 0.1935 | 0.0939 | 0.3577 | 0.114* | |
H18C | 0.0394 | 0.091 | 0.419 | 0.114* | |
C19 | 0.3730 (4) | 0.40558 (17) | 0.5469 (2) | 0.0732 (8) | |
H19A | 0.4134 | 0.4271 | 0.491 | 0.088* | |
H19B | 0.446 | 0.3652 | 0.5657 | 0.088* | |
O20 | 0.2098 (2) | 0.37888 (10) | 0.52814 (12) | 0.0592 (5) | |
C21 | 0.2021 (4) | 0.32669 (14) | 0.45558 (19) | 0.0601 (7) | |
H21A | 0.2724 | 0.2849 | 0.4727 | 0.072* | |
H21B | 0.2421 | 0.3485 | 0.3997 | 0.072* | |
C22 | 0.0265 (4) | 0.30186 (14) | 0.43774 (19) | 0.0604 (7) | |
H22A | 0.0223 | 0.2597 | 0.3966 | 0.072* | |
H22B | −0.02 | 0.2877 | 0.4956 | 0.072* | |
O23 | −0.0651 (2) | 0.36052 (10) | 0.39661 (13) | 0.0635 (5) | |
C24 | −0.2386 (4) | 0.34718 (16) | 0.3842 (2) | 0.0701 (8) | |
H24A | −0.2832 | 0.3347 | 0.4432 | 0.084* | |
H24B | −0.2596 | 0.3064 | 0.3417 | 0.084* | |
C25 | −0.3196 (4) | 0.41482 (17) | 0.3459 (2) | 0.0710 (8) | |
H25A | −0.267 | 0.4298 | 0.2901 | 0.085* | |
H25B | −0.4362 | 0.4051 | 0.3294 | 0.085* | |
O26 | −0.3054 (2) | 0.47147 (10) | 0.41232 (12) | 0.0593 (5) | |
C27 | −0.3763 (4) | 0.53832 (17) | 0.3785 (2) | 0.0751 (9) | |
H27A | −0.4904 | 0.5298 | 0.3555 | 0.09* | |
H27B | −0.3146 | 0.5562 | 0.3274 | 0.09* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0446 (12) | 0.0398 (11) | 0.0441 (12) | −0.0009 (10) | 0.0063 (10) | 0.0024 (10) |
C2 | 0.0595 (15) | 0.0396 (12) | 0.0446 (13) | 0.0021 (11) | 0.0072 (11) | 0.0024 (10) |
C3 | 0.0721 (18) | 0.0430 (13) | 0.0575 (16) | 0.0097 (12) | 0.0141 (13) | −0.0013 (11) |
C4 | 0.0701 (18) | 0.0579 (16) | 0.0655 (18) | 0.0079 (14) | 0.0232 (14) | −0.0043 (14) |
C5 | 0.0668 (17) | 0.0661 (17) | 0.0609 (16) | 0.0010 (14) | 0.0273 (14) | 0.0083 (14) |
N6 | 0.0555 (12) | 0.0434 (11) | 0.0623 (13) | 0.0026 (9) | 0.0160 (10) | 0.0114 (9) |
O7 | 0.1030 (17) | 0.0471 (11) | 0.1058 (17) | 0.0174 (11) | 0.0451 (13) | 0.0281 (11) |
S8 | 0.0691 (4) | 0.0367 (3) | 0.0622 (4) | 0.0080 (3) | 0.0234 (3) | 0.0054 (3) |
C9 | 0.0619 (15) | 0.0363 (12) | 0.0526 (14) | 0.0007 (11) | 0.0147 (12) | 0.0009 (10) |
C10 | 0.0471 (13) | 0.0355 (11) | 0.0494 (13) | 0.0004 (9) | 0.0103 (10) | 0.0027 (10) |
C11 | 0.0416 (12) | 0.0413 (12) | 0.0554 (14) | 0.0010 (10) | 0.0094 (10) | 0.0009 (10) |
C12 | 0.0544 (15) | 0.0465 (13) | 0.0499 (14) | 0.0031 (11) | 0.0050 (11) | −0.0025 (11) |
C13 | 0.0551 (15) | 0.0455 (13) | 0.0494 (14) | 0.0106 (11) | 0.0180 (11) | 0.0104 (11) |
C14 | 0.0405 (12) | 0.0496 (14) | 0.0639 (16) | 0.0039 (11) | 0.0109 (11) | 0.0135 (12) |
C15 | 0.0473 (13) | 0.0403 (12) | 0.0565 (14) | −0.0030 (10) | 0.0026 (11) | 0.0067 (11) |
C16 | 0.0475 (15) | 0.0646 (17) | 0.0806 (19) | 0.0003 (13) | 0.0036 (13) | −0.0121 (15) |
C17 | 0.084 (2) | 0.0733 (19) | 0.0652 (18) | 0.0222 (16) | 0.0339 (16) | 0.0082 (15) |
C18 | 0.0627 (18) | 0.073 (2) | 0.090 (2) | −0.0042 (15) | −0.0110 (16) | −0.0117 (18) |
C19 | 0.0583 (17) | 0.0603 (18) | 0.101 (2) | 0.0089 (14) | 0.0081 (16) | 0.0113 (17) |
O20 | 0.0580 (11) | 0.0578 (11) | 0.0633 (11) | 0.0006 (8) | 0.0147 (9) | −0.0013 (9) |
C21 | 0.0724 (18) | 0.0469 (14) | 0.0634 (17) | 0.0101 (13) | 0.0246 (14) | 0.0093 (12) |
C22 | 0.082 (2) | 0.0395 (13) | 0.0613 (16) | 0.0011 (13) | 0.0222 (14) | 0.0054 (12) |
O23 | 0.0668 (12) | 0.0476 (10) | 0.0768 (13) | −0.0066 (9) | 0.0089 (10) | 0.0110 (9) |
C24 | 0.073 (2) | 0.0585 (17) | 0.079 (2) | −0.0173 (15) | 0.0043 (16) | −0.0082 (15) |
C25 | 0.0691 (19) | 0.0725 (19) | 0.0694 (19) | −0.0102 (16) | −0.0117 (15) | −0.0074 (16) |
O26 | 0.0608 (11) | 0.0588 (11) | 0.0574 (11) | 0.0024 (9) | −0.0048 (9) | 0.0023 (9) |
C27 | 0.0657 (19) | 0.072 (2) | 0.085 (2) | 0.0026 (15) | −0.0183 (16) | 0.0099 (17) |
C1—N6 | 1.368 (3) | C16—H16C | 0.96 |
C1—C2 | 1.379 (3) | C17—H17A | 0.96 |
C1—S8 | 1.743 (2) | C17—H17B | 0.96 |
C2—C3 | 1.373 (3) | C17—H17C | 0.96 |
C2—H2 | 0.93 | C18—H18A | 0.96 |
C3—C4 | 1.367 (4) | C18—H18B | 0.96 |
C3—H3 | 0.93 | C18—H18C | 0.96 |
C4—C5 | 1.362 (4) | C19—O20 | 1.411 (3) |
C4—H4 | 0.93 | C19—C27i | 1.482 (4) |
C5—N6 | 1.348 (3) | C19—H19A | 0.97 |
C5—H5 | 0.93 | C19—H19B | 0.97 |
N6—O7 | 1.303 (3) | O20—C21 | 1.412 (3) |
S8—C9 | 1.823 (2) | C21—C22 | 1.491 (4) |
C9—C10 | 1.508 (3) | C21—H21A | 0.97 |
C9—H9A | 0.97 | C21—H21B | 0.97 |
C9—H9B | 0.97 | C22—O23 | 1.408 (3) |
C10—C11 | 1.392 (3) | C22—H22A | 0.97 |
C10—C15 | 1.406 (3) | C22—H22B | 0.97 |
C11—C12 | 1.391 (3) | O23—C24 | 1.418 (3) |
C11—C16 | 1.510 (3) | C24—C25 | 1.483 (4) |
C12—C13 | 1.380 (3) | C24—H24A | 0.97 |
C12—H12 | 0.93 | C24—H24B | 0.97 |
C13—C14 | 1.374 (4) | C25—O26 | 1.407 (3) |
C13—C17 | 1.509 (3) | C25—H25A | 0.97 |
C14—C15 | 1.389 (3) | C25—H25B | 0.97 |
C14—H14 | 0.93 | O26—C27 | 1.417 (3) |
C15—C18 | 1.512 (4) | C27—C19i | 1.482 (4) |
C16—H16A | 0.96 | C27—H27A | 0.97 |
C16—H16B | 0.96 | C27—H27B | 0.97 |
N6—C1—C2 | 118.9 (2) | C13—C17—H17B | 109.5 |
N6—C1—S8 | 111.80 (17) | H17A—C17—H17B | 109.5 |
C2—C1—S8 | 129.24 (18) | C13—C17—H17C | 109.5 |
C3—C2—C1 | 120.0 (2) | H17A—C17—H17C | 109.5 |
C3—C2—H2 | 120 | H17B—C17—H17C | 109.5 |
C1—C2—H2 | 120 | C15—C18—H18A | 109.5 |
C4—C3—C2 | 120.2 (2) | C15—C18—H18B | 109.5 |
C4—C3—H3 | 119.9 | H18A—C18—H18B | 109.5 |
C2—C3—H3 | 119.9 | C15—C18—H18C | 109.5 |
C5—C4—C3 | 119.1 (2) | H18A—C18—H18C | 109.5 |
C5—C4—H4 | 120.5 | H18B—C18—H18C | 109.5 |
C3—C4—H4 | 120.5 | O20—C19—C27i | 110.6 (2) |
N6—C5—C4 | 121.3 (2) | O20—C19—H19A | 109.5 |
N6—C5—H5 | 119.4 | C27i—C19—H19A | 109.5 |
C4—C5—H5 | 119.4 | O20—C19—H19B | 109.5 |
O7—N6—C5 | 121.5 (2) | C27i—C19—H19B | 109.5 |
O7—N6—C1 | 118.0 (2) | H19A—C19—H19B | 108.1 |
C5—N6—C1 | 120.5 (2) | C19—O20—C21 | 111.8 (2) |
C1—S8—C9 | 100.10 (11) | O20—C21—C22 | 109.3 (2) |
C10—C9—S8 | 108.26 (15) | O20—C21—H21A | 109.8 |
C10—C9—H9A | 110 | C22—C21—H21A | 109.8 |
S8—C9—H9A | 110 | O20—C21—H21B | 109.8 |
C10—C9—H9B | 110 | C22—C21—H21B | 109.8 |
S8—C9—H9B | 110 | H21A—C21—H21B | 108.3 |
H9A—C9—H9B | 108.4 | O23—C22—C21 | 108.1 (2) |
C11—C10—C15 | 119.5 (2) | O23—C22—H22A | 110.1 |
C11—C10—C9 | 119.6 (2) | C21—C22—H22A | 110.1 |
C15—C10—C9 | 120.9 (2) | O23—C22—H22B | 110.1 |
C12—C11—C10 | 119.8 (2) | C21—C22—H22B | 110.1 |
C12—C11—C16 | 118.3 (2) | H22A—C22—H22B | 108.4 |
C10—C11—C16 | 121.9 (2) | C22—O23—C24 | 114.2 (2) |
C13—C12—C11 | 121.4 (2) | O23—C24—C25 | 108.2 (2) |
C13—C12—H12 | 119.3 | O23—C24—H24A | 110.1 |
C11—C12—H12 | 119.3 | C25—C24—H24A | 110.1 |
C14—C13—C12 | 118.1 (2) | O23—C24—H24B | 110.1 |
C14—C13—C17 | 121.6 (2) | C25—C24—H24B | 110.1 |
C12—C13—C17 | 120.2 (3) | H24A—C24—H24B | 108.4 |
C13—C14—C15 | 122.7 (2) | O26—C25—C24 | 109.7 (2) |
C13—C14—H14 | 118.7 | O26—C25—H25A | 109.7 |
C15—C14—H14 | 118.7 | C24—C25—H25A | 109.7 |
C14—C15—C10 | 118.5 (2) | O26—C25—H25B | 109.7 |
C14—C15—C18 | 119.1 (2) | C24—C25—H25B | 109.7 |
C10—C15—C18 | 122.4 (2) | H25A—C25—H25B | 108.2 |
C11—C16—H16A | 109.5 | C25—O26—C27 | 112.3 (2) |
C11—C16—H16B | 109.5 | O26—C27—C19i | 110.6 (2) |
H16A—C16—H16B | 109.5 | O26—C27—H27A | 109.5 |
C11—C16—H16C | 109.5 | C19i—C27—H27A | 109.5 |
H16A—C16—H16C | 109.5 | O26—C27—H27B | 109.5 |
H16B—C16—H16C | 109.5 | C19i—C27—H27B | 109.5 |
C13—C17—H17A | 109.5 | H27A—C27—H27B | 108.1 |
N6—C1—C2—C3 | −0.3 (4) | C10—C11—C12—C13 | 1.5 (4) |
S8—C1—C2—C3 | 178.2 (2) | C16—C11—C12—C13 | −179.8 (2) |
C1—C2—C3—C4 | −0.7 (4) | C11—C12—C13—C14 | −0.4 (4) |
C2—C3—C4—C5 | 1.0 (4) | C11—C12—C13—C17 | −177.1 (2) |
C3—C4—C5—N6 | −0.2 (5) | C12—C13—C14—C15 | −1.6 (4) |
C4—C5—N6—O7 | −179.9 (3) | C17—C13—C14—C15 | 175.1 (2) |
C4—C5—N6—C1 | −0.8 (4) | C13—C14—C15—C10 | 2.4 (3) |
C2—C1—N6—O7 | −179.8 (2) | C13—C14—C15—C18 | −176.9 (2) |
S8—C1—N6—O7 | 1.4 (3) | C11—C10—C15—C14 | −1.3 (3) |
C2—C1—N6—C5 | 1.1 (4) | C9—C10—C15—C14 | 179.2 (2) |
S8—C1—N6—C5 | −177.7 (2) | C11—C10—C15—C18 | 178.0 (2) |
N6—C1—S8—C9 | 179.41 (18) | C9—C10—C15—C18 | −1.6 (4) |
C2—C1—S8—C9 | 0.8 (3) | C27i—C19—O20—C21 | 178.4 (2) |
C1—S8—C9—C10 | 172.97 (17) | C19—O20—C21—C22 | −178.8 (2) |
S8—C9—C10—C11 | −83.8 (2) | O20—C21—C22—O23 | 70.4 (3) |
S8—C9—C10—C15 | 95.8 (2) | C21—C22—O23—C24 | −174.0 (2) |
C15—C10—C11—C12 | −0.6 (3) | C22—O23—C24—C25 | 176.6 (2) |
C9—C10—C11—C12 | 179.0 (2) | O23—C24—C25—O26 | −66.6 (3) |
C15—C10—C11—C16 | −179.3 (2) | C24—C25—O26—C27 | 178.2 (3) |
C9—C10—C11—C16 | 0.3 (3) | C25—O26—C27—C19i | 174.7 (2) |
Symmetry code: (i) −x, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C4—H4···O23ii | 0.93 | 2.50 | 3.187 (3) | 131 |
C16—H16A···O7iii | 0.96 | 2.38 | 3.257 (4) | 152 |
C27—H27A···Cg1iv | 0.97 | 2.78 | 3.723 (4) | 163 |
C21—H21A···Cg2 | 0.97 | 2.80 | 3.693 (3) | 153 |
C2—H2···Cg2v | 0.93 | 2.90 | 3.732 (3) | 150 |
Symmetry codes: (ii) −x+1, y−1/2, −z+1/2; (iii) x, −y+1/2, z+1/2; (iv) −x, y+1/2, −z+1/2; (v) −x+1, −y, −z+1. |
Experimental details
Crystal data | |
Chemical formula | 2C15H17NOS·C12H24O6 |
Mr | 783.02 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 298 |
a, b, c (Å) | 8.050 (2), 18.1903 (18), 14.424 (4) |
β (°) | 93.475 (14) |
V (Å3) | 2108.3 (8) |
Z | 2 |
Radiation type | Cu Kα |
µ (mm−1) | 1.57 |
Crystal size (mm) | 0.26 × 0.22 × 0.19 |
Data collection | |
Diffractometer | Enraf–Nonius CAD-4 diffractometer |
Absorption correction | ψ scan (North et al., 1968) |
Tmin, Tmax | 0.95, 0.99 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3999, 3999, 2846 |
Rint | 0 |
(sin θ/λ)max (Å−1) | 0.610 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.049, 0.132, 1.03 |
No. of reflections | 3999 |
No. of parameters | 247 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.21, −0.25 |
Computer programs: CAD-4 Software (Enraf–Nonius, 1989), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008.
D—H···A | D—H | H···A | D···A | D—H···A |
C4—H4···O23i | 0.93 | 2.50 | 3.187 (3) | 131 |
C16—H16A···O7ii | 0.96 | 2.38 | 3.257 (4) | 152 |
C27—H27A···Cg1iii | 0.97 | 2.78 | 3.723 (4) | 163 |
C21—H21A···Cg2 | 0.97 | 2.80 | 3.693 (3) | 153 |
C2—H2···Cg2iv | 0.93 | 2.90 | 3.732 (3) | 150 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x, −y+1/2, z+1/2; (iii) −x, y+1/2, −z+1/2; (iv) −x+1, −y, −z+1. |
Acknowledgements
BRDN thanks the University Grants Commission, India, for a Teacher Fellowship.
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.
N-Oxides and their derivatives show a broad spectrum of biological activity, such as antifungal, antibacterial, antimicrobial and antibacterial activities (Lobana & Bhatia, 1989; Symons et al.,1985). These compounds are also found to be involved in DNA strand scission under physiological conditions (Katsuyuki et al., 1991; Bovin et al.1992). Pyridine N-oxides bearing a sulfur group in position 2 display significant antimicrobial activity (Leonard et al.,1955). In view of the importance of N-oxides, we have previously reported the crystal structures of N-oxide derivatives (Jebas et al., 2005; Ravindran Durai Nayagam et al., 2008). As an extension of our work on these derivatives, we report here the crystal structure of the title compound (Fig. 1).
The asymmetric unit of the title compound consists of one mono(1-oxopyridine 2-sulfanylmethyl)mesitylene molecule and one-half of a 18-crown 6-ether molecule, the other half being inversion related. The bond lengths and angles of the N-oxide moiety agree well with those observed in other N-oxide derivatives reported earlier (Jebas et al., 2005; Ravindran et al., 2008). The N—O bond length is in good agreement with the mean value of 1.304 (15) Å reported in the literature for pyridine N-oxides (Allen et al.,1987).
The oxopyridinium and benzene rings are planar to within ±0.006 (2) Å and ±0.012 (2) Å, respectively, and they form a dihedral angle of 85.88 (12)°, indicating that both the rings are perpendicular to each other. Atom O7 deviates from the plane of the pyridinium ring by 0.006 (2) Å.
The crystal packing is consolidated by weak C—H···π interactions involving the oxopyridinium (N6/C1–C5) and benzene rings (C10–15), and C—H···O hydrogen bonds (Table 1).