organic compounds
2,4-Dinitro-1-naphthyl 4-toluenesulfonate
aDepartment of Chemistry, Valliammai Engineering College, Chennai, India, and bDepartment of Physics, Presidency College, Chennai 600 005, India
*Correspondence e-mail: manivan_1999@yahoo.com
In the title compound, C17H12N2O7S, the dihedral angle between the benzene ring and the naphthyl plane is 26.34 (6)°. The nitro groups make dihedral angles of 40.09 (4) and 37.05 (3)° with the naphthyl plane. In the weak intra- and intermolecular C—H⋯O interactions are observed.
Related literature
For biological activity, see: Yachi et al. (1989). For the structure of closely related compounds, see: Manivannan et al. (2005a,b).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell APEX2; data reduction: APEX2; 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: SHELXL97.
Supporting information
10.1107/S1600536808010052/is2287sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808010052/is2287Isup2.hkl
Calculated quantity of (10 mmol) of alpha naphthol was dissolved in hot con. sulfuric acid (10 ml) and heated for 10 minutes over a water bath to get disulfonic acid. To this was added (10 ml) of fuming nitric acid in small quantity at a time with stirring. After the addition was over the reaction mixture was kept aside for an hour. It was poured into crushed ice with stirring. The precipitate was filtered, washed with cold water, dried and recrystallized from rectified spirit.
A solution of the above 2,4-dinitronaphthol and triethylamine in acetone was treated with sulfonyl chloride in acetone. This was left as such overnight. The solvent was evaporated and the residue was washed with triethylamine solution. The crude product was recrystallized from ethanol to get diffraction quality crystal of 2,4-dintro-1-naphthyl-4-toluene sulfonate.
H atoms were positioned geometrically and refined using riding model with C—H = 0.93 Å and Uiso(H) = 1.2Ueq(C) for aromatic C—H, and with C—H = 0.96 Å and Uiso(H) = 1.5Ueq(C) for CH3.
Data collection: APEX2 (Bruker, 2004); cell
APEX2 (Bruker, 2004); data reduction: APEX2 (Bruker, 2004); 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: SHELXL97 (Sheldrick, 2008).C17H12N2O7S | F(000) = 800 |
Mr = 388.35 | Dx = 1.512 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4023 reflections |
a = 13.071 (2) Å | θ = 1.8–25.2° |
b = 7.8660 (13) Å | µ = 0.24 mm−1 |
c = 16.595 (3) Å | T = 295 K |
β = 90.757 (3)° | Block, colourless |
V = 1706.0 (5) Å3 | 0.36 × 0.25 × 0.13 mm |
Z = 4 |
Bruker Kappa APEXII diffractometer | 3116 independent reflections |
Radiation source: fine-focus sealed tube | 2291 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
ω and ϕ scans | θmax = 25.4°, θmin = 2.5° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −15→15 |
Tmin = 0.920, Tmax = 0.970 | k = −9→9 |
12222 measured reflections | l = −19→19 |
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)] = 0.044 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.104 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0486P)2 + 0.4765P] where P = (Fo2 + 2Fc2)/3 |
3116 reflections | (Δ/σ)max < 0.001 |
245 parameters | Δρmax = 0.20 e Å−3 |
0 restraints | Δρmin = −0.23 e Å−3 |
C17H12N2O7S | V = 1706.0 (5) Å3 |
Mr = 388.35 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 13.071 (2) Å | µ = 0.24 mm−1 |
b = 7.8660 (13) Å | T = 295 K |
c = 16.595 (3) Å | 0.36 × 0.25 × 0.13 mm |
β = 90.757 (3)° |
Bruker Kappa APEXII diffractometer | 3116 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2291 reflections with I > 2σ(I) |
Tmin = 0.920, Tmax = 0.970 | Rint = 0.031 |
12222 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | 0 restraints |
wR(F2) = 0.104 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.20 e Å−3 |
3116 reflections | Δρmin = −0.23 e Å−3 |
245 parameters |
x | y | z | Uiso*/Ueq | ||
S1 | 0.75961 (5) | 0.14928 (8) | 0.91732 (3) | 0.04636 (19) | |
N2 | 0.47400 (18) | 0.4441 (3) | 1.21402 (12) | 0.0509 (5) | |
N1 | 0.77051 (15) | 0.1383 (3) | 1.12836 (11) | 0.0511 (5) | |
C8 | 0.62399 (17) | 0.1694 (3) | 1.03092 (12) | 0.0379 (5) | |
C9 | 0.66905 (17) | 0.2018 (3) | 1.10432 (13) | 0.0396 (5) | |
C10 | 0.61838 (18) | 0.2985 (3) | 1.16206 (13) | 0.0418 (5) | |
H10 | 0.6505 | 0.3244 | 1.2109 | 0.050* | |
C11 | 0.52268 (18) | 0.3540 (3) | 1.14659 (12) | 0.0394 (5) | |
C12 | 0.47017 (17) | 0.3258 (3) | 1.07210 (12) | 0.0383 (5) | |
C13 | 0.52516 (16) | 0.2336 (3) | 1.01249 (12) | 0.0366 (5) | |
C14 | 0.37180 (18) | 0.3875 (3) | 1.05167 (14) | 0.0462 (6) | |
H14 | 0.3347 | 0.4476 | 1.0897 | 0.055* | |
C15 | 0.33082 (18) | 0.3603 (3) | 0.97732 (15) | 0.0502 (6) | |
H15 | 0.2658 | 0.4016 | 0.9651 | 0.060* | |
C16 | 0.38494 (19) | 0.2709 (3) | 0.91879 (15) | 0.0494 (6) | |
H16 | 0.3558 | 0.2542 | 0.8680 | 0.059* | |
C17 | 0.47966 (18) | 0.2082 (3) | 0.93546 (13) | 0.0421 (5) | |
H17 | 0.5148 | 0.1484 | 0.8962 | 0.051* | |
C1 | 0.82025 (17) | −0.0380 (3) | 0.88993 (14) | 0.0467 (6) | |
C4 | 0.9179 (2) | −0.3362 (4) | 0.84598 (18) | 0.0639 (7) | |
C2 | 0.8941 (2) | −0.1075 (4) | 0.94025 (17) | 0.0660 (8) | |
H2 | 0.9113 | −0.0548 | 0.9888 | 0.079* | |
C3 | 0.9421 (2) | −0.2557 (4) | 0.91778 (19) | 0.0744 (9) | |
H3 | 0.9918 | −0.3026 | 0.9516 | 0.089* | |
C6 | 0.7943 (2) | −0.1167 (4) | 0.81845 (15) | 0.0583 (7) | |
H6 | 0.7439 | −0.0708 | 0.7848 | 0.070* | |
C5 | 0.8437 (2) | −0.2639 (4) | 0.79741 (18) | 0.0671 (8) | |
H5 | 0.8264 | −0.3163 | 0.7489 | 0.081* | |
C7 | 0.9719 (2) | −0.4974 (4) | 0.8216 (2) | 0.0947 (11) | |
H7A | 1.0222 | −0.4715 | 0.7818 | 0.142* | |
H7B | 0.9230 | −0.5762 | 0.7995 | 0.142* | |
H7C | 1.0049 | −0.5470 | 0.8680 | 0.142* | |
O1 | 0.70983 (14) | 0.2246 (2) | 0.84979 (9) | 0.0613 (5) | |
O2 | 0.82266 (13) | 0.2523 (2) | 0.96766 (10) | 0.0584 (5) | |
O3 | 0.67103 (11) | 0.06829 (18) | 0.97377 (8) | 0.0431 (4) | |
O4 | 0.82359 (15) | 0.2326 (3) | 1.16921 (12) | 0.0810 (6) | |
O5 | 0.79512 (14) | −0.0046 (3) | 1.10830 (11) | 0.0644 (5) | |
O6 | 0.53013 (16) | 0.5300 (3) | 1.25734 (11) | 0.0738 (6) | |
O7 | 0.38300 (16) | 0.4246 (3) | 1.22514 (11) | 0.0713 (6) |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0527 (4) | 0.0503 (4) | 0.0362 (3) | −0.0065 (3) | 0.0072 (3) | −0.0017 (3) |
N2 | 0.0698 (15) | 0.0451 (12) | 0.0382 (11) | 0.0054 (11) | 0.0093 (11) | 0.0005 (9) |
N1 | 0.0516 (13) | 0.0644 (15) | 0.0372 (11) | −0.0010 (12) | −0.0001 (9) | 0.0005 (11) |
C8 | 0.0473 (13) | 0.0341 (12) | 0.0324 (11) | −0.0068 (10) | 0.0055 (10) | 0.0000 (9) |
C9 | 0.0447 (13) | 0.0384 (12) | 0.0358 (12) | −0.0044 (10) | 0.0001 (10) | 0.0041 (10) |
C10 | 0.0582 (15) | 0.0389 (12) | 0.0285 (11) | −0.0081 (11) | 0.0000 (10) | 0.0002 (10) |
C11 | 0.0532 (14) | 0.0313 (11) | 0.0338 (11) | −0.0022 (10) | 0.0087 (10) | 0.0017 (9) |
C12 | 0.0485 (13) | 0.0300 (11) | 0.0364 (12) | −0.0069 (10) | 0.0043 (10) | 0.0048 (9) |
C13 | 0.0446 (13) | 0.0309 (11) | 0.0344 (11) | −0.0090 (10) | 0.0013 (10) | 0.0028 (9) |
C14 | 0.0521 (14) | 0.0383 (13) | 0.0485 (14) | −0.0017 (11) | 0.0078 (11) | 0.0060 (11) |
C15 | 0.0448 (14) | 0.0490 (14) | 0.0566 (15) | −0.0038 (11) | −0.0045 (12) | 0.0106 (13) |
C16 | 0.0564 (15) | 0.0488 (14) | 0.0427 (13) | −0.0126 (12) | −0.0088 (12) | 0.0061 (11) |
C17 | 0.0517 (14) | 0.0394 (12) | 0.0352 (12) | −0.0088 (11) | 0.0001 (10) | 0.0011 (10) |
C1 | 0.0405 (13) | 0.0579 (15) | 0.0420 (13) | −0.0071 (11) | 0.0076 (11) | −0.0057 (11) |
C4 | 0.0484 (15) | 0.0653 (18) | 0.078 (2) | −0.0063 (14) | 0.0158 (14) | −0.0175 (16) |
C2 | 0.0531 (16) | 0.087 (2) | 0.0578 (16) | 0.0052 (15) | −0.0036 (13) | −0.0213 (15) |
C3 | 0.0555 (17) | 0.089 (2) | 0.079 (2) | 0.0164 (16) | −0.0041 (15) | −0.0103 (18) |
C6 | 0.0564 (16) | 0.0690 (18) | 0.0496 (15) | 0.0026 (14) | 0.0009 (12) | −0.0111 (13) |
C5 | 0.0612 (17) | 0.076 (2) | 0.0641 (18) | −0.0081 (15) | 0.0040 (14) | −0.0264 (16) |
C7 | 0.075 (2) | 0.077 (2) | 0.133 (3) | 0.0067 (18) | 0.022 (2) | −0.028 (2) |
O1 | 0.0794 (12) | 0.0660 (12) | 0.0387 (9) | 0.0039 (9) | 0.0059 (9) | 0.0086 (8) |
O2 | 0.0630 (11) | 0.0584 (11) | 0.0539 (10) | −0.0189 (9) | 0.0080 (8) | −0.0100 (9) |
O3 | 0.0514 (9) | 0.0404 (9) | 0.0377 (8) | −0.0031 (7) | 0.0076 (7) | −0.0054 (7) |
O4 | 0.0617 (12) | 0.1075 (17) | 0.0734 (13) | −0.0049 (11) | −0.0180 (11) | −0.0267 (12) |
O5 | 0.0660 (12) | 0.0632 (12) | 0.0640 (12) | 0.0149 (10) | −0.0005 (9) | 0.0042 (10) |
O6 | 0.0898 (15) | 0.0723 (13) | 0.0593 (12) | 0.0021 (11) | 0.0009 (11) | −0.0308 (10) |
O7 | 0.0664 (13) | 0.0885 (15) | 0.0596 (12) | 0.0031 (11) | 0.0229 (10) | −0.0065 (10) |
S1—O1 | 1.4179 (17) | C14—H14 | 0.9300 |
S1—O2 | 1.4196 (16) | C15—C16 | 1.399 (3) |
S1—O3 | 1.6287 (16) | C15—H15 | 0.9300 |
S1—C1 | 1.736 (3) | C16—C17 | 1.358 (3) |
N2—O7 | 1.216 (3) | C16—H16 | 0.9300 |
N2—O6 | 1.224 (3) | C17—H17 | 0.9300 |
N2—C11 | 1.476 (3) | C1—C6 | 1.377 (3) |
N1—O4 | 1.216 (3) | C1—C2 | 1.381 (3) |
N1—O5 | 1.216 (3) | C4—C5 | 1.376 (4) |
N1—C9 | 1.467 (3) | C4—C3 | 1.382 (4) |
C8—C9 | 1.370 (3) | C4—C7 | 1.509 (4) |
C8—O3 | 1.388 (2) | C2—C3 | 1.378 (4) |
C8—C13 | 1.416 (3) | C2—H2 | 0.9300 |
C9—C10 | 1.397 (3) | C3—H3 | 0.9300 |
C10—C11 | 1.346 (3) | C6—C5 | 1.373 (4) |
C10—H10 | 0.9300 | C6—H6 | 0.9300 |
C11—C12 | 1.423 (3) | C5—H5 | 0.9300 |
C12—C14 | 1.411 (3) | C7—H7A | 0.9600 |
C12—C13 | 1.429 (3) | C7—H7B | 0.9600 |
C13—C17 | 1.417 (3) | C7—H7C | 0.9600 |
C14—C15 | 1.356 (3) | ||
O1—S1—O2 | 118.91 (11) | C14—C15—H15 | 119.5 |
O1—S1—O3 | 107.20 (10) | C16—C15—H15 | 119.5 |
O2—S1—O3 | 107.24 (9) | C17—C16—C15 | 120.6 (2) |
O1—S1—C1 | 110.71 (11) | C17—C16—H16 | 119.7 |
O2—S1—C1 | 112.01 (11) | C15—C16—H16 | 119.7 |
O3—S1—C1 | 98.58 (10) | C16—C17—C13 | 120.2 (2) |
O7—N2—O6 | 124.1 (2) | C16—C17—H17 | 119.9 |
O7—N2—C11 | 119.1 (2) | C13—C17—H17 | 119.9 |
O6—N2—C11 | 116.7 (2) | C6—C1—C2 | 120.4 (2) |
O4—N1—O5 | 124.4 (2) | C6—C1—S1 | 119.9 (2) |
O4—N1—C9 | 116.8 (2) | C2—C1—S1 | 119.70 (19) |
O5—N1—C9 | 118.8 (2) | C5—C4—C3 | 117.8 (3) |
C9—C8—O3 | 121.7 (2) | C5—C4—C7 | 121.3 (3) |
C9—C8—C13 | 120.4 (2) | C3—C4—C7 | 120.9 (3) |
O3—C8—C13 | 117.89 (18) | C3—C2—C1 | 119.2 (3) |
C8—C9—C10 | 120.6 (2) | C3—C2—H2 | 120.4 |
C8—C9—N1 | 123.7 (2) | C1—C2—H2 | 120.4 |
C10—C9—N1 | 115.71 (19) | C2—C3—C4 | 121.4 (3) |
C11—C10—C9 | 119.6 (2) | C2—C3—H3 | 119.3 |
C11—C10—H10 | 120.2 | C4—C3—H3 | 119.3 |
C9—C10—H10 | 120.2 | C5—C6—C1 | 119.2 (3) |
C10—C11—C12 | 123.4 (2) | C5—C6—H6 | 120.4 |
C10—C11—N2 | 114.8 (2) | C1—C6—H6 | 120.4 |
C12—C11—N2 | 121.7 (2) | C6—C5—C4 | 122.0 (3) |
C14—C12—C11 | 125.6 (2) | C6—C5—H5 | 119.0 |
C14—C12—C13 | 118.3 (2) | C4—C5—H5 | 119.0 |
C11—C12—C13 | 116.1 (2) | C4—C7—H7A | 109.5 |
C8—C13—C17 | 121.0 (2) | C4—C7—H7B | 109.5 |
C8—C13—C12 | 119.83 (19) | H7A—C7—H7B | 109.5 |
C17—C13—C12 | 119.1 (2) | C4—C7—H7C | 109.5 |
C15—C14—C12 | 120.8 (2) | H7A—C7—H7C | 109.5 |
C15—C14—H14 | 119.6 | H7B—C7—H7C | 109.5 |
C12—C14—H14 | 119.6 | C8—O3—S1 | 119.58 (13) |
C14—C15—C16 | 120.9 (2) | ||
O3—C8—C9—C10 | −177.46 (19) | C11—C12—C14—C15 | 176.7 (2) |
C13—C8—C9—C10 | 0.0 (3) | C13—C12—C14—C15 | −0.2 (3) |
O3—C8—C9—N1 | 1.8 (3) | C12—C14—C15—C16 | −0.2 (3) |
C13—C8—C9—N1 | 179.21 (19) | C14—C15—C16—C17 | 0.5 (3) |
O4—N1—C9—C8 | 143.2 (2) | C15—C16—C17—C13 | −0.3 (3) |
O5—N1—C9—C8 | −38.6 (3) | C8—C13—C17—C16 | −179.9 (2) |
O4—N1—C9—C10 | −37.5 (3) | C12—C13—C17—C16 | −0.1 (3) |
O5—N1—C9—C10 | 140.7 (2) | O1—S1—C1—C6 | −17.0 (2) |
C8—C9—C10—C11 | 2.9 (3) | O2—S1—C1—C6 | −152.30 (19) |
N1—C9—C10—C11 | −176.4 (2) | O3—S1—C1—C6 | 95.1 (2) |
C9—C10—C11—C12 | −2.8 (3) | O1—S1—C1—C2 | 163.2 (2) |
C9—C10—C11—N2 | 175.77 (19) | O2—S1—C1—C2 | 27.9 (2) |
O7—N2—C11—C10 | −143.1 (2) | O3—S1—C1—C2 | −84.7 (2) |
O6—N2—C11—C10 | 34.3 (3) | C6—C1—C2—C3 | 0.5 (4) |
O7—N2—C11—C12 | 35.5 (3) | S1—C1—C2—C3 | −179.7 (2) |
O6—N2—C11—C12 | −147.1 (2) | C1—C2—C3—C4 | 0.0 (5) |
C10—C11—C12—C14 | −177.1 (2) | C5—C4—C3—C2 | −0.3 (4) |
N2—C11—C12—C14 | 4.5 (3) | C7—C4—C3—C2 | 179.2 (3) |
C10—C11—C12—C13 | −0.1 (3) | C2—C1—C6—C5 | −0.8 (4) |
N2—C11—C12—C13 | −178.59 (19) | S1—C1—C6—C5 | 179.4 (2) |
C9—C8—C13—C17 | 176.87 (19) | C1—C6—C5—C4 | 0.6 (4) |
O3—C8—C13—C17 | −5.6 (3) | C3—C4—C5—C6 | 0.0 (4) |
C9—C8—C13—C12 | −2.9 (3) | C7—C4—C5—C6 | −179.5 (3) |
O3—C8—C13—C12 | 174.60 (17) | C9—C8—O3—S1 | −80.6 (2) |
C14—C12—C13—C8 | −179.86 (19) | C13—C8—O3—S1 | 101.93 (19) |
C11—C12—C13—C8 | 3.0 (3) | O1—S1—O3—C8 | −86.68 (17) |
C14—C12—C13—C17 | 0.3 (3) | O2—S1—O3—C8 | 42.07 (17) |
C11—C12—C13—C17 | −176.83 (19) | C1—S1—O3—C8 | 158.41 (16) |
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···O5 | 0.93 | 2.55 | 3.194 (3) | 127 |
C14—H14···O7 | 0.93 | 2.33 | 2.895 (3) | 119 |
C17—H17···O3 | 0.93 | 2.48 | 2.798 (3) | 100 |
C10—H10···O1i | 0.93 | 2.45 | 3.327 (3) | 157 |
Symmetry code: (i) x, −y+1/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C17H12N2O7S |
Mr | 388.35 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 295 |
a, b, c (Å) | 13.071 (2), 7.8660 (13), 16.595 (3) |
β (°) | 90.757 (3) |
V (Å3) | 1706.0 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.36 × 0.25 × 0.13 |
Data collection | |
Diffractometer | Bruker Kappa APEXII diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.920, 0.970 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12222, 3116, 2291 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.044, 0.104, 1.02 |
No. of reflections | 3116 |
No. of parameters | 245 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.20, −0.23 |
Computer programs: APEX2 (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···O5 | 0.93 | 2.55 | 3.194 (3) | 127 |
C14—H14···O7 | 0.93 | 2.33 | 2.895 (3) | 119 |
C17—H17···O3 | 0.93 | 2.48 | 2.798 (3) | 100 |
C10—H10···O1i | 0.93 | 2.45 | 3.327 (3) | 157 |
Symmetry code: (i) x, −y+1/2, z+1/2. |
Acknowledgements
The authors acknowledge Professor T. N. Guru Row and Dr Vijay Thiruvenkatam, Indian Institute of Science, Bangalore, India, for the data collection.
References
Bruker (2004). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
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Aromatic sulfonates are used in monitoring the merging of lipids (Yachi et al., 1989). The geometric parameters in the title compound agree with the reported values of similar structures (Manivannan et al., 2005a,b). The dihedral angle between the mean planes of phenyl and naphthyl rings is 26.34 (6)°. The planes N1/O5/O4 and N2/O6/O7 make the dihedral angles of 40.09 (4) and 37.05 (3)°, respectively, with the naphthyl ring. The torsion angles [O1—S1—C1—C6 = -17.0 (2)° and O2—S1—C1—C2 = 27.9 (2)°] indicate a syn conformation of the sulfonyl moiety.
In addition to this, because of the presence of highly electron attracting nitro groups, there are strong dipole-dipole attractions between different molecules in the lattice arrangement. The nitro group substituted naphthylring, which is electron deficient is found to be lying over the electron rich tolyl benzene ring of another molecule in the lattice. This leads to a sort of charge transfer complex.
The enhanced stability of this compound and larger stability of the lattice when compared to other sulfonates reported already, is supported by thermoanalytic studies. This compound is having higher density, melting point and higher lattice energy when compared to others. Another interesting property of this compound is that it possesses antibacterial activity almost equivalent to those of antibiotics. This is attributed to the elongation of the S—O (S1—O3) bond in –S—O–naphthyl ring such that the dissociation to naphthoxy moiety is facilitated. The facile formation of the naphthoxy radical is further supported by the high intensity peak for this specy in the Mass spectra. Kinetic studies also indicate that the rate of hydrolysis (rate of cleavage of the –S—O– bond) is very high when compared to other toluene sulfonates reported already.
The molecular structure is stabilized by weak intramolecular C—H···O interactions and the crystal packing of (I) (Fig. 2) is stabilized by weak intermolecular C—H···O interactions.