organic compounds
4-[(4-Methoxybenzylidene)amino]benzenesulfonamide
aDepartment of Chemistry, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa, and bDepartment of Chemistry, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031, South Africa
*Correspondence e-mail: idemudiaog@yahoo.com
The title Schiff base compound, C14H14N2O3S, is non-planar, with a dihedral angle of 24.16 (7)° between the benzene rings. In the crystal, N—H⋯O and N—H⋯N hydrogen bonds link the molecules into a layer parallel to (011). Intra- and interlayer C—H⋯O interactions and π–π interactions [centroid–centroid distances = 3.8900 (9) and 3.9355 (8) Å] are also present.
Related literature
For general background to the applications of sulfanilamide et al. (2003); Khalil et al. (2009); Nagpal & Singh (2004); Sharaby (2007); Wu et al. (2004).
see: GuptaExperimental
Crystal data
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Data collection: APEX2 (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: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: PLATON (Spek, 2009) and publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536812018818/hy2541sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812018818/hy2541Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812018818/hy2541Isup3.cdx
Supporting information file. DOI: 10.1107/S1600536812018818/hy2541Isup4.cml
A mixture of (4-aminobenzenesulfonamide)sulfadiazine and 4-methoxybenzaldehyde (anisaldehyde) (molar ratio 1:1) in methanol was refluxed for 15 h. The resultant pale yellow precipitate was isolated by filtration and recrystalized from methanol. Yield 68% and melting point 199–201°C. Single crystals suitable for X-ray analysis were obtained from methanol by slow evaporation at room temperature.
C-bound H atoms were placed in calculated positions and refined as riding atoms, with C—H = 0.95 (CH), 0.98 (CH3) Å and with Uiso(H) = 1.2(1.5 for methyl)Ueq(C). N-bound H atoms were located on a difference Fourier map and refined as riding with Uiso(H) = 1.2Ueq(N).
Data collection: APEX2 (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: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: PLATON (Spek, 2009) and publCIF (Westrip, 2010).C14H14N2O3S | F(000) = 608 |
Mr = 290.33 | Dx = 1.401 Mg m−3 |
Monoclinic, P21/c | Melting point: 473.15 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 16.3315 (5) Å | Cell parameters from 118 reflections |
b = 11.1597 (3) Å | θ = 3.1–29.3° |
c = 7.6876 (3) Å | µ = 0.24 mm−1 |
β = 100.661 (1)° | T = 200 K |
V = 1376.92 (8) Å3 | Platelet, yellow |
Z = 4 | 0.60 × 0.33 × 0.12 mm |
Bruker APEXII CCD diffractometer | 3383 independent reflections |
Radiation source: sealed tube | 2821 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.017 |
Detector resolution: 8.3333 pixels mm-1 | θmax = 28.3°, θmin = 2.2° |
ϕ and ω scans | h = −21→21 |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | k = −14→14 |
Tmin = 0.90, Tmax = 0.97 | l = −10→8 |
10501 measured reflections |
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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.095 | H-atom parameters constrained |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0391P)2 + 0.7392P] where P = (Fo2 + 2Fc2)/3 |
3383 reflections | (Δ/σ)max = 0.001 |
182 parameters | Δρmax = 0.41 e Å−3 |
0 restraints | Δρmin = −0.39 e Å−3 |
C14H14N2O3S | V = 1376.92 (8) Å3 |
Mr = 290.33 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 16.3315 (5) Å | µ = 0.24 mm−1 |
b = 11.1597 (3) Å | T = 200 K |
c = 7.6876 (3) Å | 0.60 × 0.33 × 0.12 mm |
β = 100.661 (1)° |
Bruker APEXII CCD diffractometer | 3383 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 2821 reflections with I > 2σ(I) |
Tmin = 0.90, Tmax = 0.97 | Rint = 0.017 |
10501 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.095 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.41 e Å−3 |
3383 reflections | Δρmin = −0.39 e Å−3 |
182 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 | 0.663198 (19) | 0.87003 (3) | 0.83688 (5) | 0.02211 (10) | |
O1 | −0.04751 (7) | 0.67929 (13) | 0.0325 (2) | 0.0479 (4) | |
O2 | 0.68589 (6) | 0.74895 (9) | 0.88958 (16) | 0.0306 (3) | |
O3 | 0.66935 (7) | 0.96150 (10) | 0.96956 (16) | 0.0333 (3) | |
N1 | 0.31032 (7) | 0.85378 (10) | 0.45630 (17) | 0.0231 (2) | |
N2 | 0.72148 (7) | 0.90797 (11) | 0.69963 (17) | 0.0248 (3) | |
H2A | 0.719 | 0.8559 | 0.6172 | 0.03* | |
H2B | 0.7141 | 0.9792 | 0.6628 | 0.03* | |
C1 | 0.27140 (8) | 0.75396 (13) | 0.4333 (2) | 0.0250 (3) | |
H1 | 0.2986 | 0.6843 | 0.4867 | 0.03* | |
C2 | −0.10221 (11) | 0.7766 (2) | −0.0293 (3) | 0.0553 (6) | |
H2C | −0.0756 | 0.8292 | −0.1044 | 0.083* | |
H2D | −0.1142 | 0.8221 | 0.0721 | 0.083* | |
H2E | −0.1543 | 0.7451 | −0.0979 | 0.083* | |
C11 | 0.18743 (8) | 0.74102 (13) | 0.3295 (2) | 0.0257 (3) | |
C12 | 0.15750 (9) | 0.62521 (14) | 0.2867 (2) | 0.0319 (3) | |
H12 | 0.1914 | 0.558 | 0.3275 | 0.038* | |
C13 | 0.07929 (10) | 0.60763 (15) | 0.1859 (2) | 0.0365 (4) | |
H13 | 0.0598 | 0.5287 | 0.1558 | 0.044* | |
C14 | 0.02902 (9) | 0.70602 (16) | 0.1285 (2) | 0.0335 (4) | |
C15 | 0.05726 (9) | 0.82138 (15) | 0.1709 (2) | 0.0344 (4) | |
H15 | 0.0228 | 0.8884 | 0.1321 | 0.041* | |
C16 | 0.13644 (9) | 0.83808 (14) | 0.2707 (2) | 0.0310 (3) | |
H16 | 0.1561 | 0.9171 | 0.2993 | 0.037* | |
C21 | 0.39382 (8) | 0.85383 (12) | 0.55004 (19) | 0.0206 (3) | |
C22 | 0.44881 (8) | 0.75989 (12) | 0.5357 (2) | 0.0225 (3) | |
H22 | 0.43 | 0.6923 | 0.4643 | 0.027* | |
C23 | 0.53057 (8) | 0.76496 (12) | 0.6253 (2) | 0.0223 (3) | |
H23 | 0.5675 | 0.7002 | 0.6176 | 0.027* | |
C24 | 0.55836 (8) | 0.86504 (11) | 0.72618 (19) | 0.0199 (3) | |
C25 | 0.50485 (9) | 0.96019 (12) | 0.7391 (2) | 0.0244 (3) | |
H25 | 0.5244 | 1.0287 | 0.8077 | 0.029* | |
C26 | 0.42248 (8) | 0.95441 (12) | 0.6508 (2) | 0.0246 (3) | |
H26 | 0.3857 | 1.0192 | 0.6592 | 0.03* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.01897 (16) | 0.02111 (17) | 0.02420 (19) | −0.00156 (11) | −0.00138 (12) | 0.00123 (13) |
O1 | 0.0217 (5) | 0.0634 (9) | 0.0533 (9) | −0.0056 (5) | −0.0072 (5) | −0.0087 (7) |
O2 | 0.0250 (5) | 0.0263 (5) | 0.0377 (7) | 0.0009 (4) | −0.0015 (4) | 0.0113 (5) |
O3 | 0.0301 (5) | 0.0363 (6) | 0.0304 (6) | −0.0027 (4) | −0.0023 (4) | −0.0097 (5) |
N1 | 0.0194 (5) | 0.0234 (6) | 0.0252 (6) | 0.0002 (4) | 0.0007 (4) | 0.0015 (5) |
N2 | 0.0224 (5) | 0.0197 (5) | 0.0314 (7) | −0.0027 (4) | 0.0029 (5) | 0.0025 (5) |
C1 | 0.0216 (6) | 0.0235 (6) | 0.0284 (8) | −0.0005 (5) | 0.0010 (5) | 0.0029 (5) |
C2 | 0.0239 (8) | 0.0838 (16) | 0.0532 (13) | 0.0076 (9) | −0.0063 (8) | −0.0003 (12) |
C11 | 0.0198 (6) | 0.0279 (7) | 0.0282 (8) | −0.0023 (5) | 0.0013 (5) | 0.0010 (6) |
C12 | 0.0263 (7) | 0.0282 (7) | 0.0391 (9) | −0.0030 (6) | 0.0005 (6) | 0.0016 (7) |
C13 | 0.0282 (7) | 0.0346 (8) | 0.0440 (10) | −0.0092 (6) | −0.0002 (7) | −0.0053 (7) |
C14 | 0.0188 (6) | 0.0477 (9) | 0.0323 (9) | −0.0032 (6) | 0.0005 (6) | −0.0036 (7) |
C15 | 0.0226 (7) | 0.0388 (9) | 0.0398 (10) | 0.0041 (6) | 0.0008 (6) | 0.0013 (7) |
C16 | 0.0234 (7) | 0.0292 (7) | 0.0388 (9) | −0.0004 (6) | 0.0014 (6) | 0.0009 (7) |
C21 | 0.0191 (6) | 0.0199 (6) | 0.0217 (7) | −0.0003 (5) | 0.0013 (5) | 0.0036 (5) |
C22 | 0.0218 (6) | 0.0191 (6) | 0.0259 (7) | −0.0024 (5) | 0.0026 (5) | −0.0029 (5) |
C23 | 0.0202 (6) | 0.0193 (6) | 0.0274 (7) | 0.0002 (5) | 0.0045 (5) | −0.0008 (5) |
C24 | 0.0183 (5) | 0.0192 (6) | 0.0213 (7) | −0.0016 (4) | 0.0014 (5) | 0.0022 (5) |
C25 | 0.0254 (6) | 0.0176 (6) | 0.0281 (7) | −0.0009 (5) | 0.0000 (5) | −0.0023 (5) |
C26 | 0.0238 (6) | 0.0190 (6) | 0.0297 (8) | 0.0026 (5) | 0.0015 (5) | −0.0011 (5) |
S1—O3 | 1.4333 (11) | C12—H12 | 0.95 |
S1—O2 | 1.4393 (10) | C13—C14 | 1.393 (2) |
S1—N2 | 1.6032 (13) | C13—H13 | 0.95 |
S1—C24 | 1.7663 (13) | C14—C15 | 1.386 (2) |
O1—C14 | 1.3617 (17) | C15—C16 | 1.389 (2) |
O1—C2 | 1.430 (2) | C15—H15 | 0.95 |
N1—C1 | 1.2786 (18) | C16—H16 | 0.95 |
N1—C21 | 1.4196 (16) | C21—C26 | 1.3945 (19) |
N2—H2A | 0.8551 | C21—C22 | 1.3978 (18) |
N2—H2B | 0.8452 | C22—C23 | 1.3856 (18) |
C1—C11 | 1.4607 (18) | C22—H22 | 0.95 |
C1—H1 | 0.95 | C23—C24 | 1.3875 (19) |
C2—H2C | 0.98 | C23—H23 | 0.95 |
C2—H2D | 0.98 | C24—C25 | 1.3904 (18) |
C2—H2E | 0.98 | C25—C26 | 1.3916 (19) |
C11—C16 | 1.390 (2) | C25—H25 | 0.95 |
C11—C12 | 1.399 (2) | C26—H26 | 0.95 |
C12—C13 | 1.380 (2) | ||
O3—S1—O2 | 119.20 (7) | C14—C13—H13 | 120.1 |
O3—S1—N2 | 107.96 (7) | O1—C14—C15 | 124.27 (15) |
O2—S1—N2 | 106.25 (7) | O1—C14—C13 | 115.28 (15) |
O3—S1—C24 | 107.42 (6) | C15—C14—C13 | 120.44 (14) |
O2—S1—C24 | 106.39 (6) | C14—C15—C16 | 119.35 (15) |
N2—S1—C24 | 109.38 (6) | C14—C15—H15 | 120.3 |
C14—O1—C2 | 117.90 (15) | C16—C15—H15 | 120.3 |
C1—N1—C21 | 118.48 (12) | C15—C16—C11 | 121.04 (15) |
S1—N2—H2A | 110.9 | C15—C16—H16 | 119.5 |
S1—N2—H2B | 113.8 | C11—C16—H16 | 119.5 |
H2A—N2—H2B | 114.0 | C26—C21—C22 | 119.53 (12) |
N1—C1—C11 | 123.66 (13) | C26—C21—N1 | 118.32 (12) |
N1—C1—H1 | 118.2 | C22—C21—N1 | 122.04 (12) |
C11—C1—H1 | 118.2 | C23—C22—C21 | 120.29 (12) |
O1—C2—H2C | 109.5 | C23—C22—H22 | 119.9 |
O1—C2—H2D | 109.5 | C21—C22—H22 | 119.9 |
H2C—C2—H2D | 109.5 | C22—C23—C24 | 119.74 (12) |
O1—C2—H2E | 109.5 | C22—C23—H23 | 120.1 |
H2C—C2—H2E | 109.5 | C24—C23—H23 | 120.1 |
H2D—C2—H2E | 109.5 | C23—C24—C25 | 120.64 (12) |
C16—C11—C12 | 118.77 (13) | C23—C24—S1 | 118.85 (10) |
C16—C11—C1 | 123.09 (13) | C25—C24—S1 | 120.51 (10) |
C12—C11—C1 | 118.13 (13) | C24—C25—C26 | 119.57 (13) |
C13—C12—C11 | 120.67 (14) | C24—C25—H25 | 120.2 |
C13—C12—H12 | 119.7 | C26—C25—H25 | 120.2 |
C11—C12—H12 | 119.7 | C25—C26—C21 | 120.19 (12) |
C12—C13—C14 | 119.73 (15) | C25—C26—H26 | 119.9 |
C12—C13—H13 | 120.1 | C21—C26—H26 | 119.9 |
C21—N1—C1—C11 | −175.87 (13) | C26—C21—C22—C23 | 1.9 (2) |
N1—C1—C11—C16 | −11.2 (2) | N1—C21—C22—C23 | 178.05 (13) |
N1—C1—C11—C12 | 168.42 (16) | C21—C22—C23—C24 | −1.5 (2) |
C16—C11—C12—C13 | 0.9 (3) | C22—C23—C24—C25 | 0.3 (2) |
C1—C11—C12—C13 | −178.67 (16) | C22—C23—C24—S1 | −179.27 (11) |
C11—C12—C13—C14 | −1.1 (3) | O3—S1—C24—C23 | −163.03 (12) |
C2—O1—C14—C15 | 0.3 (3) | O2—S1—C24—C23 | −34.34 (13) |
C2—O1—C14—C13 | 179.64 (17) | N2—S1—C24—C23 | 80.04 (12) |
C12—C13—C14—O1 | −178.90 (16) | O3—S1—C24—C25 | 17.41 (14) |
C12—C13—C14—C15 | 0.4 (3) | O2—S1—C24—C25 | 146.11 (12) |
O1—C14—C15—C16 | 179.57 (16) | N2—S1—C24—C25 | −99.52 (13) |
C13—C14—C15—C16 | 0.3 (3) | C23—C24—C25—C26 | 0.5 (2) |
C14—C15—C16—C11 | −0.4 (3) | S1—C24—C25—C26 | 180.00 (11) |
C12—C11—C16—C15 | −0.2 (2) | C24—C25—C26—C21 | 0.0 (2) |
C1—C11—C16—C15 | 179.39 (15) | C22—C21—C26—C25 | −1.2 (2) |
C1—N1—C21—C26 | −148.41 (14) | N1—C21—C26—C25 | −177.44 (13) |
C1—N1—C21—C22 | 35.4 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2A···O2i | 0.86 | 2.09 | 2.9280 (17) | 166 |
N2—H2B···N1ii | 0.85 | 2.08 | 2.9233 (17) | 173 |
C1—H1···O3iii | 0.95 | 2.55 | 3.4466 (18) | 157 |
C2—H2E···O2iv | 0.98 | 2.59 | 3.415 (2) | 141 |
Symmetry codes: (i) x, −y+3/2, z−1/2; (ii) −x+1, −y+2, −z+1; (iii) −x+1, y−1/2, −z+3/2; (iv) x−1, y, z−1. |
Experimental details
Crystal data | |
Chemical formula | C14H14N2O3S |
Mr | 290.33 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 200 |
a, b, c (Å) | 16.3315 (5), 11.1597 (3), 7.6876 (3) |
β (°) | 100.661 (1) |
V (Å3) | 1376.92 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.60 × 0.33 × 0.12 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.90, 0.97 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10501, 3383, 2821 |
Rint | 0.017 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.095, 1.08 |
No. of reflections | 3383 |
No. of parameters | 182 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.41, −0.39 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), PLATON (Spek, 2009) and publCIF (Westrip, 2010).
Acknowledgements
The authors thank the Department of Chemistry and Govan Mbeki Research and Development Centre (GMRDC), University of Fort Hare, for their support.
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.
Biological applications of sulfa compounds either alone or as metal complexes are well known (Gupta et al., 2003; Nagpal & Singh, 2004). Their chelating powers towards metal ions tend to increase on forming a Schiff base by way of reaction with a carbonyl (Khalil et al., 2009; Sharaby, 2007; Wu et al., 2004). Herein, we report a new sulfanilamide Schiff base (Fig. 1), as part of our look at developing better chelating ligands from biologically active amine compounds.
The least-squares planes through the phenyl rings of the benzenesulfonamide and methoxybenzaldehyde groups have a dihedral angle of 24.16 (7)°. In the crystal, the molecules are stacked along the c axis and linked by N—H···O and N—H···N hydrogen bonds (Table 1 and Fig. 2) into a layer parallel to (0 1 1) (Fig. 3). The least-squares planes through adjacent two methoxybenzaldehyde phenyl rings (C11–C16) are almost parallel with a dihedral angle of 3.97° and a centroid-to-centroid distance of 3.8900 (9) Å. The centroid-to-centroid distance between adjacent two benzenesulfonamide phenyl rings (C21–C26) is 3.9355 (8) Å. C22—H22···π interaction occurs with the adjacent C21–C26 ring (H···Cg distance = 2.81 Å). Intra- and interlayer C—H···O interactions are also observed.