organic compounds
1-[5-(Dimethylamino)-1-naphthylsulfonyl]imidazolidine-2-thione
aSchool of Chemical and Materials Engineering, Huangshi Institute of Technology, Huangshi 435003, People's Republic of China
*Correspondence e-mail: zy0340907@yahoo.com.cn
In the title molecule, C15H17N3O2S2, the dihedral angle between the naphthalene ring system and the imidazole ring is 89.63 (2)°. The is stablized by weak intermolecuar C—H⋯π and N—H⋯π interactions.
Related literature
For the applications of compounds containing a 5-(dimethylamino)naphthalene-1-sulfonyl group, see: Corradini et al. (1996, 1997); Christoforou et al. (2006). For a related structure, see: Zhang et al. (2009). For the synthetic procedure, see: Corradini et al. (1996).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2007); cell SAINT (Bruker, 2007); 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: SHELXTL (Sheldrick, 2008).
Supporting information
https://doi.org/10.1107/S1600536810029788/lh5094sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810029788/lh5094Isup2.hkl
The intermediate N-(2-Aminoethyl)-5-(dimethylamino)naphthalene-1-sulfonamide was synthesized according to a literature procedure (Corradini et al., 1996). Carbon bisulfide (0.76 g, 10 mmol) and sodium hydroxide(0.40 g, 10 mmol) were added into a stirred solution of the above intermediate (1.47 g, 5 mmol) in dry methanol (20 ml).The reaction mixture was allowed to stir for 24 hr at 293 K. The progress of the reaction was monitored by TLC, untill the completion of reaction. The solvent was evaporated and the residue was purified by
(dichloromethane-ethyl acetate,1:8 v/v) to afford the title compound as a yellow solid. Single crystals suitable for X-ray diffraction were prepared by slow evaporation of a solution of the title compound in dichloromethane at room temperature.All H atoms were placed in idealized positions [C—H(methyl)=0.96 Å, 0.97Å (methylene) and 0.93 Å (aromatic),with Uiso(H)= 1.5Ueq(methyl C) 1.2Ueq(other C). N-bounded hydrogen atom was found from the difference map and refined with the restraint of N—H = 0.88 (3)Å and Uiso(H) = 1.2 Ueq(N).
The dansyl (5-(dimethylamino)naphthalene-1-sulfonyl) group has been widely used as a fluorophore due to its good fluorescent properties. Recently many dansyl derivatives have been reported (Corradini et al., 1996,1997; Christoforou et al., 2006). We show great interest in preparing fluorescent probes that are expected to bind to hydrophobic sites in proteins or membranes and have recently published a structure reslted to the title compound (Zhang et al., 2009). With this in mind, the title compound, (I), was prepared and we report herein the crystal stucture.
In the molecular structure (Fig. 1), the dihedral angle between the naphthalene ring and five-membered heterocyclic ring is 89.63 (2)°. The π and N—H···π interactions.
is stablized by weak intermolecuar C—H···For the applications of compounds containing a 5-(dimethylamino)naphthalene-1-sulfonyl group, see: Corradini et al. (1996, 1997); Christoforou et al. (2006). For a related structure, see: Zhang et al. (2009). For the synthetic procedure, see: Corradini et al. (1996).
Data collection: SMART (Bruker, 2007); cell
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: PLATON (Spek, 2009); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The molecular structure of (I), with displacement ellipsoids drawn at the 50% probability level. |
C15H17N3O2S2 | F(000) = 700 |
Mr = 335.44 | Dx = 1.465 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2682 reflections |
a = 15.364 (4) Å | θ = 2.4–28.1° |
b = 6.9814 (18) Å | µ = 0.36 mm−1 |
c = 15.470 (4) Å | T = 298 K |
β = 113.967 (4)° | Block, yellow |
V = 1516.3 (7) Å3 | 0.33 × 0.32 × 0.28 mm |
Z = 4 |
Bruker SMART CCD diffractometer | 3302 independent reflections |
Radiation source: fine-focus sealed tube | 2605 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.104 |
φ and ω scans | θmax = 27.0°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1997) | h = −17→19 |
Tmin = 0.955, Tmax = 0.965 | k = −8→8 |
8935 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)] = 0.056 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.145 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.071P)2] where P = (Fo2 + 2Fc2)/3 |
3302 reflections | (Δ/σ)max = 0.001 |
204 parameters | Δρmax = 0.50 e Å−3 |
0 restraints | Δρmin = −0.35 e Å−3 |
C15H17N3O2S2 | V = 1516.3 (7) Å3 |
Mr = 335.44 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 15.364 (4) Å | µ = 0.36 mm−1 |
b = 6.9814 (18) Å | T = 298 K |
c = 15.470 (4) Å | 0.33 × 0.32 × 0.28 mm |
β = 113.967 (4)° |
Bruker SMART CCD diffractometer | 3302 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1997) | 2605 reflections with I > 2σ(I) |
Tmin = 0.955, Tmax = 0.965 | Rint = 0.104 |
8935 measured reflections |
R[F2 > 2σ(F2)] = 0.056 | 0 restraints |
wR(F2) = 0.145 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.50 e Å−3 |
3302 reflections | Δρmin = −0.35 e Å−3 |
204 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 | ||
C1 | 0.61885 (15) | 0.6070 (3) | 0.72722 (15) | 0.0306 (5) | |
C2 | 0.68621 (19) | 0.7474 (3) | 0.76019 (18) | 0.0379 (6) | |
H2 | 0.6868 | 0.8466 | 0.7203 | 0.045* | |
C3 | 0.75453 (19) | 0.7430 (3) | 0.85392 (19) | 0.0434 (6) | |
H3 | 0.8011 | 0.8375 | 0.8746 | 0.052* | |
C4 | 0.75429 (17) | 0.6051 (3) | 0.91479 (17) | 0.0384 (6) | |
H4 | 0.7983 | 0.6099 | 0.9774 | 0.046* | |
C5 | 0.68768 (15) | 0.4529 (3) | 0.88431 (15) | 0.0271 (5) | |
C6 | 0.68432 (16) | 0.2951 (3) | 0.94243 (16) | 0.0299 (5) | |
C7 | 0.62594 (17) | 0.1403 (3) | 0.90561 (16) | 0.0342 (5) | |
H7 | 0.6253 | 0.0398 | 0.9448 | 0.041* | |
C8 | 0.56701 (17) | 0.1343 (3) | 0.80839 (17) | 0.0370 (6) | |
H8 | 0.5298 | 0.0267 | 0.7828 | 0.044* | |
C9 | 0.56426 (17) | 0.2841 (3) | 0.75203 (17) | 0.0336 (5) | |
H9 | 0.5235 | 0.2792 | 0.6883 | 0.040* | |
C10 | 0.62191 (14) | 0.4484 (3) | 0.78765 (15) | 0.0271 (5) | |
C11 | 0.45077 (18) | 0.6337 (5) | 0.6290 (2) | 0.0536 (7) | |
H11A | 0.4425 | 0.5578 | 0.6769 | 0.080* | |
H11B | 0.4051 | 0.5953 | 0.5678 | 0.080* | |
H11C | 0.4416 | 0.7665 | 0.6391 | 0.080* | |
C12 | 0.5635 (2) | 0.7304 (4) | 0.5667 (2) | 0.0576 (8) | |
H12A | 0.5604 | 0.8616 | 0.5837 | 0.086* | |
H12B | 0.5157 | 0.7072 | 0.5043 | 0.086* | |
H12C | 0.6253 | 0.7046 | 0.5677 | 0.086* | |
C13 | 0.7299 (2) | 0.6395 (4) | 1.1372 (2) | 0.0589 (8) | |
H13A | 0.7391 | 0.7055 | 1.0863 | 0.071* | |
H13B | 0.7896 | 0.6394 | 1.1929 | 0.071* | |
C14 | 0.6522 (2) | 0.7308 (4) | 1.1575 (2) | 0.0515 (7) | |
H14A | 0.6764 | 0.7806 | 1.2216 | 0.062* | |
H14B | 0.6223 | 0.8341 | 1.1135 | 0.062* | |
C15 | 0.60716 (16) | 0.4138 (3) | 1.11357 (15) | 0.0336 (5) | |
N1 | 0.54715 (14) | 0.6055 (3) | 0.63401 (13) | 0.0381 (5) | |
N2 | 0.69536 (13) | 0.4434 (3) | 1.10932 (13) | 0.0328 (4) | |
N3 | 0.58699 (18) | 0.5772 (3) | 1.14554 (17) | 0.0496 (6) | |
H3A | 0.534 (2) | 0.590 (4) | 1.154 (2) | 0.059* | |
O1 | 0.74468 (12) | 0.1037 (2) | 1.09977 (12) | 0.0422 (4) | |
O2 | 0.84230 (11) | 0.3748 (3) | 1.09114 (11) | 0.0414 (4) | |
S1 | 0.75069 (4) | 0.29031 (8) | 1.06638 (4) | 0.03206 (19) | |
S2 | 0.53971 (5) | 0.22082 (10) | 1.08475 (6) | 0.0524 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0297 (12) | 0.0365 (13) | 0.0286 (12) | 0.0012 (10) | 0.0150 (9) | 0.0006 (9) |
C2 | 0.0425 (14) | 0.0352 (13) | 0.0384 (13) | −0.0015 (10) | 0.0190 (11) | 0.0049 (10) |
C3 | 0.0452 (16) | 0.0396 (14) | 0.0437 (15) | −0.0167 (11) | 0.0165 (12) | −0.0017 (11) |
C4 | 0.0372 (14) | 0.0423 (14) | 0.0316 (12) | −0.0092 (11) | 0.0097 (10) | −0.0028 (10) |
C5 | 0.0263 (11) | 0.0309 (11) | 0.0263 (11) | 0.0000 (9) | 0.0129 (8) | −0.0013 (9) |
C6 | 0.0266 (11) | 0.0343 (12) | 0.0291 (11) | 0.0026 (9) | 0.0118 (9) | 0.0001 (9) |
C7 | 0.0402 (13) | 0.0308 (12) | 0.0339 (12) | −0.0022 (10) | 0.0173 (10) | −0.0006 (10) |
C8 | 0.0413 (14) | 0.0339 (13) | 0.0393 (13) | −0.0111 (11) | 0.0200 (11) | −0.0103 (10) |
C9 | 0.0303 (12) | 0.0416 (13) | 0.0295 (12) | −0.0041 (10) | 0.0126 (9) | −0.0060 (10) |
C10 | 0.0232 (10) | 0.0328 (12) | 0.0280 (11) | 0.0021 (9) | 0.0130 (9) | −0.0015 (9) |
C11 | 0.0345 (15) | 0.072 (2) | 0.0477 (16) | 0.0080 (14) | 0.0092 (12) | 0.0107 (14) |
C12 | 0.0583 (19) | 0.073 (2) | 0.0356 (15) | −0.0115 (15) | 0.0130 (13) | 0.0146 (13) |
C13 | 0.0640 (19) | 0.0383 (15) | 0.083 (2) | −0.0096 (14) | 0.0386 (17) | −0.0153 (15) |
C14 | 0.070 (2) | 0.0387 (15) | 0.0469 (16) | 0.0002 (13) | 0.0246 (15) | −0.0069 (12) |
C15 | 0.0395 (13) | 0.0371 (13) | 0.0266 (11) | 0.0071 (10) | 0.0158 (10) | 0.0067 (10) |
N1 | 0.0322 (11) | 0.0490 (12) | 0.0302 (10) | 0.0000 (9) | 0.0099 (8) | 0.0070 (9) |
N2 | 0.0342 (11) | 0.0307 (10) | 0.0343 (11) | −0.0012 (8) | 0.0145 (8) | −0.0036 (8) |
N3 | 0.0595 (15) | 0.0440 (13) | 0.0595 (15) | 0.0068 (11) | 0.0389 (13) | −0.0025 (11) |
O1 | 0.0509 (11) | 0.0343 (9) | 0.0399 (10) | 0.0105 (8) | 0.0169 (8) | 0.0090 (7) |
O2 | 0.0284 (9) | 0.0521 (11) | 0.0391 (10) | 0.0026 (8) | 0.0092 (7) | 0.0035 (8) |
S1 | 0.0314 (3) | 0.0339 (3) | 0.0303 (3) | 0.0052 (2) | 0.0119 (2) | 0.0030 (2) |
S2 | 0.0465 (4) | 0.0484 (4) | 0.0687 (5) | −0.0096 (3) | 0.0300 (4) | 0.0000 (3) |
C1—C2 | 1.365 (3) | C11—H11B | 0.9600 |
C1—N1 | 1.415 (3) | C11—H11C | 0.9600 |
C1—C10 | 1.437 (3) | C12—N1 | 1.456 (3) |
C2—C3 | 1.403 (4) | C12—H12A | 0.9600 |
C2—H2 | 0.9300 | C12—H12B | 0.9600 |
C3—C4 | 1.348 (3) | C12—H12C | 0.9600 |
C3—H3 | 0.9300 | C13—N2 | 1.468 (3) |
C4—C5 | 1.417 (3) | C13—C14 | 1.496 (4) |
C4—H4 | 0.9300 | C13—H13A | 0.9700 |
C5—C10 | 1.425 (3) | C13—H13B | 0.9700 |
C5—C6 | 1.436 (3) | C14—N3 | 1.428 (3) |
C6—C7 | 1.372 (3) | C14—H14A | 0.9700 |
C6—S1 | 1.769 (2) | C14—H14B | 0.9700 |
C7—C8 | 1.406 (3) | C15—N3 | 1.329 (3) |
C7—H7 | 0.9300 | C15—N2 | 1.398 (3) |
C8—C9 | 1.351 (3) | C15—S2 | 1.647 (2) |
C8—H8 | 0.9300 | N2—S1 | 1.6628 (19) |
C9—C10 | 1.417 (3) | N3—H3A | 0.88 (3) |
C9—H9 | 0.9300 | O1—S1 | 1.4182 (17) |
C11—N1 | 1.464 (3) | O2—S1 | 1.4275 (17) |
C11—H11A | 0.9600 | ||
C2—C1—N1 | 123.0 (2) | N1—C12—H12A | 109.5 |
C2—C1—C10 | 119.4 (2) | N1—C12—H12B | 109.5 |
N1—C1—C10 | 117.6 (2) | H12A—C12—H12B | 109.5 |
C1—C2—C3 | 120.4 (2) | N1—C12—H12C | 109.5 |
C1—C2—H2 | 119.8 | H12A—C12—H12C | 109.5 |
C3—C2—H2 | 119.8 | H12B—C12—H12C | 109.5 |
C4—C3—C2 | 121.7 (2) | N2—C13—C14 | 103.6 (2) |
C4—C3—H3 | 119.2 | N2—C13—H13A | 111.0 |
C2—C3—H3 | 119.2 | C14—C13—H13A | 111.0 |
C3—C4—C5 | 120.7 (2) | N2—C13—H13B | 111.0 |
C3—C4—H4 | 119.7 | C14—C13—H13B | 111.0 |
C5—C4—H4 | 119.7 | H13A—C13—H13B | 109.0 |
C4—C5—C10 | 118.31 (19) | N3—C14—C13 | 103.3 (2) |
C4—C5—C6 | 124.9 (2) | N3—C14—H14A | 111.1 |
C10—C5—C6 | 116.72 (19) | C13—C14—H14A | 111.1 |
C7—C6—C5 | 121.9 (2) | N3—C14—H14B | 111.1 |
C7—C6—S1 | 115.27 (17) | C13—C14—H14B | 111.1 |
C5—C6—S1 | 122.80 (17) | H14A—C14—H14B | 109.1 |
C6—C7—C8 | 119.7 (2) | N3—C15—N2 | 105.5 (2) |
C6—C7—H7 | 120.1 | N3—C15—S2 | 125.9 (2) |
C8—C7—H7 | 120.1 | N2—C15—S2 | 128.54 (17) |
C9—C8—C7 | 120.3 (2) | C1—N1—C12 | 115.8 (2) |
C9—C8—H8 | 119.8 | C1—N1—C11 | 113.87 (19) |
C7—C8—H8 | 119.8 | C12—N1—C11 | 110.3 (2) |
C8—C9—C10 | 121.7 (2) | C15—N2—C13 | 111.46 (19) |
C8—C9—H9 | 119.2 | C15—N2—S1 | 125.90 (16) |
C10—C9—H9 | 119.2 | C13—N2—S1 | 122.26 (17) |
C9—C10—C5 | 119.38 (19) | C15—N3—C14 | 115.8 (2) |
C9—C10—C1 | 121.37 (19) | C15—N3—H3A | 121 (2) |
C5—C10—C1 | 119.17 (19) | C14—N3—H3A | 123.1 (19) |
N1—C11—H11A | 109.5 | O1—S1—O2 | 119.00 (10) |
N1—C11—H11B | 109.5 | O1—S1—N2 | 108.99 (10) |
H11A—C11—H11B | 109.5 | O2—S1—N2 | 103.62 (10) |
N1—C11—H11C | 109.5 | O1—S1—C6 | 108.55 (11) |
H11A—C11—H11C | 109.5 | O2—S1—C6 | 110.75 (10) |
H11B—C11—H11C | 109.5 | N2—S1—C6 | 104.94 (10) |
N1—C1—C2—C3 | 178.9 (2) | C2—C1—N1—C12 | 16.4 (3) |
C10—C1—C2—C3 | −3.7 (4) | C10—C1—N1—C12 | −161.2 (2) |
C1—C2—C3—C4 | −2.1 (4) | C2—C1—N1—C11 | −113.0 (3) |
C2—C3—C4—C5 | 3.6 (4) | C10—C1—N1—C11 | 69.5 (3) |
C3—C4—C5—C10 | 0.7 (3) | N3—C15—N2—C13 | −2.2 (3) |
C3—C4—C5—C6 | 177.1 (2) | S2—C15—N2—C13 | 177.2 (2) |
C4—C5—C6—C7 | −171.7 (2) | N3—C15—N2—S1 | −175.13 (17) |
C10—C5—C6—C7 | 4.8 (3) | S2—C15—N2—S1 | 4.3 (3) |
C4—C5—C6—S1 | 11.1 (3) | C14—C13—N2—C15 | −1.1 (3) |
C10—C5—C6—S1 | −172.47 (15) | C14—C13—N2—S1 | 172.14 (18) |
C5—C6—C7—C8 | −0.3 (3) | N2—C15—N3—C14 | 5.0 (3) |
S1—C6—C7—C8 | 177.21 (17) | S2—C15—N3—C14 | −174.4 (2) |
C6—C7—C8—C9 | −3.2 (3) | C13—C14—N3—C15 | −5.7 (3) |
C7—C8—C9—C10 | 1.9 (4) | C15—N2—S1—O1 | −44.0 (2) |
C8—C9—C10—C5 | 2.9 (3) | C13—N2—S1—O1 | 143.8 (2) |
C8—C9—C10—C1 | 179.8 (2) | C15—N2—S1—O2 | −171.64 (17) |
C4—C5—C10—C9 | 170.7 (2) | C13—N2—S1—O2 | 16.1 (2) |
C6—C5—C10—C9 | −6.0 (3) | C15—N2—S1—C6 | 72.1 (2) |
C4—C5—C10—C1 | −6.3 (3) | C13—N2—S1—C6 | −100.1 (2) |
C6—C5—C10—C1 | 177.01 (18) | C7—C6—S1—O1 | 12.6 (2) |
C2—C1—C10—C9 | −169.1 (2) | C5—C6—S1—O1 | −169.92 (17) |
N1—C1—C10—C9 | 8.5 (3) | C7—C6—S1—O2 | 145.02 (18) |
C2—C1—C10—C5 | 7.8 (3) | C5—C6—S1—O2 | −37.5 (2) |
N1—C1—C10—C5 | −174.59 (19) | C7—C6—S1—N2 | −103.77 (18) |
N2—C13—C14—N3 | 3.7 (3) | C5—C6—S1—N2 | 73.67 (19) |
Cg1 and Cg2 are the centroids of the C1–C5/C10 and C5–C10 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···Cg1i | 0.93 | 2.88 | 3.667 (3) | 143 |
N3—H3A···Cg2ii | 0.88 (3) | 2.58 (3) | 3.433 (3) | 165 (2) |
Symmetry codes: (i) −x+3/2, y+1/2, −z+3/2; (ii) −x+1, −y+1, −z+2. |
Experimental details
Crystal data | |
Chemical formula | C15H17N3O2S2 |
Mr | 335.44 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 298 |
a, b, c (Å) | 15.364 (4), 6.9814 (18), 15.470 (4) |
β (°) | 113.967 (4) |
V (Å3) | 1516.3 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.36 |
Crystal size (mm) | 0.33 × 0.32 × 0.28 |
Data collection | |
Diffractometer | Bruker SMART CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1997) |
Tmin, Tmax | 0.955, 0.965 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8935, 3302, 2605 |
Rint | 0.104 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.056, 0.145, 1.04 |
No. of reflections | 3302 |
No. of parameters | 204 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.50, −0.35 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009), SHELXTL (Sheldrick, 2008).
Cg1 and Cg2 are the centroids of the C1–C5/C10 and C5–C10 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2···Cg1i | 0.93 | 2.88 | 3.667 (3) | 143 |
N3—H3A···Cg2ii | 0.88 (3) | 2.58 (3) | 3.433 (3) | 165 (2) |
Symmetry codes: (i) −x+3/2, y+1/2, −z+3/2; (ii) −x+1, −y+1, −z+2. |
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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.
The dansyl (5-(dimethylamino)naphthalene-1-sulfonyl) group has been widely used as a fluorophore due to its good fluorescent properties. Recently many dansyl derivatives have been reported (Corradini et al., 1996,1997; Christoforou et al., 2006). We show great interest in preparing fluorescent probes that are expected to bind to hydrophobic sites in proteins or membranes and have recently published a structure reslted to the title compound (Zhang et al., 2009). With this in mind, the title compound, (I), was prepared and we report herein the crystal stucture.
In the molecular structure (Fig. 1), the dihedral angle between the naphthalene ring and five-membered heterocyclic ring is 89.63 (2)°. The crystal structure is stablized by weak intermolecuar C—H···π and N—H···π interactions.