organic compounds
N-(4-Methylbenzoyl)-4-nitrobenzenesulfonamide
aDepartment of Chemistry, Mangalore University, Mangalagangotri 574 199, Mangalore, India, and bInstitute of Materials Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany
*Correspondence e-mail: gowdabt@yahoo.com
In the title compound, C14H12N2O5S, the dihedral angle between the nitrophenyl group and the –S—NH—C—O fragment is 80.74 (17)° and that between the nitrophenyl and methylphenyl groups is 87.66 (14)°. The C—S—N—C torsion angle at the S—N bond is −67.0 (3)°. In the crystal, molecules are linked into C(4) chains via N—H⋯O hydrogen bonds.
Related literature
For our studies on the effects of substituents on the structures and other aspects of N-arylamides, see: Gowda et al. (1999, 2006). For N-aryl-methanesulfonamides, see: Gowda et al. (2007). For N-(substituted-benzoyl)-arylsulfonamides, see: Suchetan et al. (2010). For N-chloroarylamides, see: Jyothi & Gowda (2004). For N-bromoarylsulfonamides, see: Usha & Gowda (2006).
Experimental
Crystal data
|
Refinement
|
Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED; 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: SHELXL97.
Supporting information
10.1107/S1600536812007854/yk2044sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812007854/yk2044Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812007854/yk2044Isup3.cml
The title compound was prepared by refluxing a mixture of 4-methylbenzoic acid, 4-nitrobenzenesulfonamide and phosphorous oxy chloride for 3 h on a water bath. The resultant mixture was cooled and poured into ice cold water. The solid obtained was filtered, washed thoroughly with water and then dissolved in sodium bicarbonate solution. The compound was reprecipitated by acidifying the filtered solution with dilute HCl. It was filtered, dried and recrystallized.
Rod like colourless single crystals of the title compound used in X-ray diffraction studies were obtained by slow evaporation from its toluene solution at room temperature.
The H atom of the NH group was located in a difference map and restrained to N—H = 0.86 (2) Å. The other H atoms were positioned with idealized geometry using a riding model with C—H distances of 0.93Å (C-aromatic) and 0.96Å (C-methyl).
All H atoms were refined with isotropic displacement parameters were set at 1.2 Ueq(C-aromatic, N) and 1.5 Ueq(C-methyl).
The Uij components of O4 were restrained to approximate isotropic behaviour.
Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell
CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED (Oxford Diffraction, 2009); 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: SHELXL97 (Sheldrick, 2008).C14H12N2O5S | F(000) = 1328 |
Mr = 320.32 | Dx = 1.500 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 818 reflections |
a = 13.969 (1) Å | θ = 2.6–27.9° |
b = 9.6591 (6) Å | µ = 0.25 mm−1 |
c = 21.026 (2) Å | T = 293 K |
V = 2837.0 (4) Å3 | Rod, colourless |
Z = 8 | 0.40 × 0.18 × 0.18 mm |
Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector | 2864 independent reflections |
Radiation source: fine-focus sealed tube | 1836 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
ω and ϕ scans | θmax = 26.4°, θmin = 2.9° |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2009) | h = −7→17 |
Tmin = 0.905, Tmax = 0.956 | k = −7→12 |
7163 measured reflections | l = −26→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)] = 0.062 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.152 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.16 | w = 1/[σ2(Fo2) + (0.0409P)2 + 3.5546P] where P = (Fo2 + 2Fc2)/3 |
2863 reflections | (Δ/σ)max = 0.015 |
203 parameters | Δρmax = 0.32 e Å−3 |
7 restraints | Δρmin = −0.21 e Å−3 |
C14H12N2O5S | V = 2837.0 (4) Å3 |
Mr = 320.32 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 13.969 (1) Å | µ = 0.25 mm−1 |
b = 9.6591 (6) Å | T = 293 K |
c = 21.026 (2) Å | 0.40 × 0.18 × 0.18 mm |
Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector | 2864 independent reflections |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2009) | 1836 reflections with I > 2σ(I) |
Tmin = 0.905, Tmax = 0.956 | Rint = 0.027 |
7163 measured reflections |
R[F2 > 2σ(F2)] = 0.062 | 7 restraints |
wR(F2) = 0.152 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.16 | Δρmax = 0.32 e Å−3 |
2863 reflections | Δρmin = −0.21 e Å−3 |
203 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 | 0.5261 (3) | 0.2260 (4) | 0.55537 (17) | 0.0407 (9) | |
C2 | 0.4949 (3) | 0.1161 (4) | 0.5903 (2) | 0.0490 (10) | |
H2 | 0.5302 | 0.0345 | 0.5911 | 0.059* | |
C3 | 0.4113 (3) | 0.1260 (4) | 0.6240 (2) | 0.0533 (11) | |
H3 | 0.3899 | 0.0521 | 0.6486 | 0.064* | |
C4 | 0.3601 (3) | 0.2459 (4) | 0.62105 (19) | 0.0450 (9) | |
C5 | 0.3893 (3) | 0.3565 (5) | 0.5862 (2) | 0.0669 (13) | |
H5 | 0.3531 | 0.4372 | 0.5847 | 0.080* | |
C6 | 0.4737 (4) | 0.3461 (5) | 0.5534 (2) | 0.0708 (14) | |
H6 | 0.4956 | 0.4209 | 0.5296 | 0.085* | |
C7 | 0.7385 (3) | 0.3573 (4) | 0.59457 (17) | 0.0405 (9) | |
C8 | 0.8213 (3) | 0.3558 (4) | 0.63877 (17) | 0.0385 (8) | |
C9 | 0.9003 (3) | 0.2694 (4) | 0.63104 (19) | 0.0449 (9) | |
H9 | 0.9018 | 0.2066 | 0.5975 | 0.054* | |
C10 | 0.9763 (3) | 0.2765 (4) | 0.67281 (19) | 0.0490 (10) | |
H10 | 1.0293 | 0.2199 | 0.6664 | 0.059* | |
C11 | 0.9750 (3) | 0.3668 (4) | 0.72441 (19) | 0.0463 (10) | |
C12 | 0.8959 (3) | 0.4520 (4) | 0.73124 (19) | 0.0497 (10) | |
H12 | 0.8938 | 0.5135 | 0.7652 | 0.060* | |
C13 | 0.8207 (3) | 0.4481 (4) | 0.68931 (18) | 0.0458 (10) | |
H13 | 0.7691 | 0.5076 | 0.6948 | 0.055* | |
C14 | 1.0575 (3) | 0.3736 (5) | 0.7701 (2) | 0.0638 (12) | |
H14A | 1.1160 | 0.3865 | 0.7469 | 0.077* | |
H14B | 1.0609 | 0.2889 | 0.7939 | 0.077* | |
H14C | 1.0484 | 0.4499 | 0.7988 | 0.077* | |
N1 | 0.7201 (2) | 0.2339 (3) | 0.56360 (15) | 0.0421 (8) | |
H1N | 0.750 (3) | 0.161 (3) | 0.5748 (17) | 0.051* | |
N2 | 0.2706 (3) | 0.2572 (4) | 0.65756 (17) | 0.0569 (9) | |
O1 | 0.6446 (2) | 0.0697 (3) | 0.49280 (14) | 0.0605 (8) | |
O2 | 0.6361 (2) | 0.3183 (3) | 0.46528 (13) | 0.0647 (9) | |
O3 | 0.68781 (18) | 0.4583 (3) | 0.58609 (13) | 0.0519 (7) | |
O4 | 0.2492 (3) | 0.1639 (4) | 0.6926 (2) | 0.1066 (14) | |
O5 | 0.2239 (2) | 0.3613 (4) | 0.65262 (17) | 0.0805 (10) | |
S1 | 0.63333 (7) | 0.21032 (11) | 0.51121 (5) | 0.0474 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.042 (2) | 0.042 (2) | 0.038 (2) | −0.0042 (18) | −0.0084 (17) | 0.0030 (17) |
C2 | 0.046 (2) | 0.035 (2) | 0.067 (3) | 0.0027 (18) | −0.002 (2) | 0.005 (2) |
C3 | 0.050 (2) | 0.039 (2) | 0.070 (3) | −0.003 (2) | 0.003 (2) | 0.012 (2) |
C4 | 0.0384 (19) | 0.044 (2) | 0.053 (2) | −0.0040 (18) | −0.0034 (19) | 0.0001 (18) |
C5 | 0.061 (3) | 0.052 (3) | 0.088 (4) | 0.018 (2) | 0.014 (3) | 0.024 (3) |
C6 | 0.073 (3) | 0.053 (3) | 0.087 (3) | 0.012 (2) | 0.019 (3) | 0.039 (3) |
C7 | 0.041 (2) | 0.0330 (19) | 0.048 (2) | −0.0044 (17) | 0.0068 (18) | −0.0038 (18) |
C8 | 0.0351 (18) | 0.0321 (18) | 0.048 (2) | −0.0054 (16) | 0.0051 (17) | −0.0010 (17) |
C9 | 0.046 (2) | 0.035 (2) | 0.054 (2) | −0.0011 (18) | 0.0016 (19) | −0.0090 (18) |
C10 | 0.041 (2) | 0.042 (2) | 0.064 (3) | 0.0021 (18) | 0.002 (2) | −0.001 (2) |
C11 | 0.043 (2) | 0.049 (2) | 0.047 (2) | −0.007 (2) | 0.0037 (18) | 0.001 (2) |
C12 | 0.048 (2) | 0.056 (2) | 0.045 (2) | −0.007 (2) | 0.0065 (19) | −0.013 (2) |
C13 | 0.040 (2) | 0.044 (2) | 0.053 (2) | 0.0000 (18) | 0.0099 (19) | −0.0075 (19) |
C14 | 0.055 (3) | 0.085 (3) | 0.052 (3) | −0.005 (2) | −0.007 (2) | −0.002 (2) |
N1 | 0.0432 (18) | 0.0345 (17) | 0.0487 (19) | −0.0012 (14) | −0.0045 (15) | −0.0009 (15) |
N2 | 0.051 (2) | 0.056 (2) | 0.064 (2) | −0.0004 (19) | 0.0042 (19) | 0.0004 (19) |
O1 | 0.0604 (18) | 0.0604 (18) | 0.0606 (18) | −0.0056 (15) | 0.0001 (15) | −0.0237 (15) |
O2 | 0.069 (2) | 0.081 (2) | 0.0444 (16) | −0.0037 (17) | 0.0040 (15) | 0.0182 (16) |
O3 | 0.0455 (16) | 0.0353 (14) | 0.0749 (19) | 0.0039 (13) | −0.0010 (14) | −0.0027 (14) |
O4 | 0.098 (3) | 0.081 (2) | 0.140 (3) | 0.004 (2) | 0.058 (2) | 0.026 (2) |
O5 | 0.062 (2) | 0.086 (2) | 0.094 (3) | 0.0287 (19) | 0.0031 (18) | 0.004 (2) |
S1 | 0.0490 (6) | 0.0523 (6) | 0.0409 (5) | −0.0053 (5) | −0.0008 (5) | −0.0027 (5) |
C1—C2 | 1.362 (5) | C9—H9 | 0.9300 |
C1—C6 | 1.373 (5) | C10—C11 | 1.392 (5) |
C1—S1 | 1.769 (4) | C10—H10 | 0.9300 |
C2—C3 | 1.369 (5) | C11—C12 | 1.385 (5) |
C2—H2 | 0.9300 | C11—C14 | 1.502 (5) |
C3—C4 | 1.363 (5) | C12—C13 | 1.372 (5) |
C3—H3 | 0.9300 | C12—H12 | 0.9300 |
C4—C5 | 1.359 (6) | C13—H13 | 0.9300 |
C4—N2 | 1.471 (5) | C14—H14A | 0.9600 |
C5—C6 | 1.369 (6) | C14—H14B | 0.9600 |
C5—H5 | 0.9300 | C14—H14C | 0.9600 |
C6—H6 | 0.9300 | N1—S1 | 1.654 (3) |
C7—O3 | 1.218 (4) | N1—H1N | 0.852 (19) |
C7—N1 | 1.383 (4) | N2—O4 | 1.202 (5) |
C7—C8 | 1.484 (5) | N2—O5 | 1.203 (4) |
C8—C13 | 1.387 (5) | O1—S1 | 1.421 (3) |
C8—C9 | 1.393 (5) | O2—S1 | 1.422 (3) |
C9—C10 | 1.380 (5) | ||
C2—C1—C6 | 120.3 (4) | C11—C10—H10 | 119.4 |
C2—C1—S1 | 119.1 (3) | C12—C11—C10 | 117.6 (4) |
C6—C1—S1 | 120.5 (3) | C12—C11—C14 | 121.3 (4) |
C1—C2—C3 | 119.9 (4) | C10—C11—C14 | 121.1 (4) |
C1—C2—H2 | 120.1 | C13—C12—C11 | 121.9 (4) |
C3—C2—H2 | 120.1 | C13—C12—H12 | 119.1 |
C4—C3—C2 | 118.9 (4) | C11—C12—H12 | 119.1 |
C4—C3—H3 | 120.6 | C12—C13—C8 | 120.4 (4) |
C2—C3—H3 | 120.6 | C12—C13—H13 | 119.8 |
C5—C4—C3 | 122.4 (4) | C8—C13—H13 | 119.8 |
C5—C4—N2 | 118.6 (4) | C11—C14—H14A | 109.5 |
C3—C4—N2 | 119.0 (4) | C11—C14—H14B | 109.5 |
C4—C5—C6 | 118.2 (4) | H14A—C14—H14B | 109.5 |
C4—C5—H5 | 120.9 | C11—C14—H14C | 109.5 |
C6—C5—H5 | 120.9 | H14A—C14—H14C | 109.5 |
C5—C6—C1 | 120.4 (4) | H14B—C14—H14C | 109.5 |
C5—C6—H6 | 119.8 | C7—N1—S1 | 124.7 (3) |
C1—C6—H6 | 119.8 | C7—N1—H1N | 119 (3) |
O3—C7—N1 | 120.9 (3) | S1—N1—H1N | 116 (3) |
O3—C7—C8 | 123.5 (3) | O4—N2—O5 | 123.0 (4) |
N1—C7—C8 | 115.6 (3) | O4—N2—C4 | 118.4 (4) |
C13—C8—C9 | 118.6 (4) | O5—N2—C4 | 118.6 (4) |
C13—C8—C7 | 118.0 (3) | O1—S1—O2 | 120.89 (19) |
C9—C8—C7 | 123.4 (3) | O1—S1—N1 | 103.42 (17) |
C10—C9—C8 | 120.4 (4) | O2—S1—N1 | 109.36 (17) |
C10—C9—H9 | 119.8 | O1—S1—C1 | 108.56 (18) |
C8—C9—H9 | 119.8 | O2—S1—C1 | 108.45 (18) |
C9—C10—C11 | 121.2 (4) | N1—S1—C1 | 105.02 (16) |
C9—C10—H10 | 119.4 | ||
C6—C1—C2—C3 | −0.7 (6) | C14—C11—C12—C13 | 179.1 (4) |
S1—C1—C2—C3 | −179.1 (3) | C11—C12—C13—C8 | 1.0 (6) |
C1—C2—C3—C4 | 1.1 (6) | C9—C8—C13—C12 | −1.0 (5) |
C2—C3—C4—C5 | −0.6 (7) | C7—C8—C13—C12 | −179.4 (3) |
C2—C3—C4—N2 | −179.6 (4) | O3—C7—N1—S1 | 2.5 (5) |
C3—C4—C5—C6 | −0.3 (7) | C8—C7—N1—S1 | −178.8 (3) |
N2—C4—C5—C6 | 178.7 (4) | C5—C4—N2—O4 | −173.7 (5) |
C4—C5—C6—C1 | 0.7 (8) | C3—C4—N2—O4 | 5.4 (6) |
C2—C1—C6—C5 | −0.2 (7) | C5—C4—N2—O5 | 3.9 (6) |
S1—C1—C6—C5 | 178.2 (4) | C3—C4—N2—O5 | −177.0 (4) |
O3—C7—C8—C13 | 25.4 (5) | C7—N1—S1—O1 | 179.3 (3) |
N1—C7—C8—C13 | −153.2 (3) | C7—N1—S1—O2 | 49.2 (4) |
O3—C7—C8—C9 | −152.8 (4) | C7—N1—S1—C1 | −67.0 (3) |
N1—C7—C8—C9 | 28.5 (5) | C2—C1—S1—O1 | 29.9 (4) |
C13—C8—C9—C10 | −0.3 (6) | C6—C1—S1—O1 | −148.6 (4) |
C7—C8—C9—C10 | 177.9 (3) | C2—C1—S1—O2 | 162.9 (3) |
C8—C9—C10—C11 | 1.8 (6) | C6—C1—S1—O2 | −15.5 (4) |
C9—C10—C11—C12 | −1.8 (6) | C2—C1—S1—N1 | −80.2 (3) |
C9—C10—C11—C14 | 179.6 (4) | C6—C1—S1—N1 | 101.3 (4) |
C10—C11—C12—C13 | 0.4 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O3i | 0.85 (2) | 2.16 (2) | 2.994 (4) | 168 (4) |
Symmetry code: (i) −x+3/2, y−1/2, z. |
Experimental details
Crystal data | |
Chemical formula | C14H12N2O5S |
Mr | 320.32 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 293 |
a, b, c (Å) | 13.969 (1), 9.6591 (6), 21.026 (2) |
V (Å3) | 2837.0 (4) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.25 |
Crystal size (mm) | 0.40 × 0.18 × 0.18 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector |
Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2009) |
Tmin, Tmax | 0.905, 0.956 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7163, 2864, 1836 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.062, 0.152, 1.16 |
No. of reflections | 2863 |
No. of parameters | 203 |
No. of restraints | 7 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.32, −0.21 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2009), CrysAlis RED (Oxford Diffraction, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O3i | 0.852 (19) | 2.16 (2) | 2.994 (4) | 168 (4) |
Symmetry code: (i) −x+3/2, y−1/2, z. |
Acknowledgements
BTG thanks the University Grants Commission, Government of India, New Delhi, for a UGC-BSR one-time Grant to Faculty.
References
Gowda, B. T., Bhat, D. K., Fuess, H. & Weiss, A. (1999). Z. Naturforsch. Teil A, 54, 261–267. CAS Google Scholar
Gowda, B. T., Foro, S. & Fuess, H. (2007). Acta Cryst. E63, o2597. Web of Science CSD CrossRef IUCr Journals Google Scholar
Gowda, B. T., Kozisek, J. & Fuess, H. (2006). Z. Naturforsch. Teil A, 61, 588–594. CAS Google Scholar
Jyothi, K. & Gowda, B. T. (2004). Z. Naturforsch. Teil A, 59, 64–68. CAS Google Scholar
Oxford Diffraction (2009). CrysAlis CCD and CrysAlis RED. Oxford Diffraction Ltd, Yarnton, Oxfordshire, England. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
Suchetan, P. A., Gowda, B. T., Foro, S. & Fuess, H. (2010). Acta Cryst. E66, o1501. Web of Science CSD CrossRef IUCr Journals Google Scholar
Usha, K. M. & Gowda, B. T. (2006). J. Chem. Sci. 118, 351–359. Web of Science CrossRef CAS Google Scholar
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.
As part of our studies on the substituent effects on the structures and other aspects of N-arylamides (Gowda et al., 1999, 2006), N-aryl-methanesulfonamides (Gowda et al., 2007), N-(substituted-benzoyl)-arylsulfonamides (Suchetan et al., 2010), N-chloroarylsulfonamides (Jyothi & Gowda, 2004) and N-bromoarylsulfonamides (Usha & Gowda, 2006), in the present work, the crystal structure of N-(4-methylbenzoyl)-4-nitrobenzenesulfonamide has been determined (Fig.1).
The conformation of the N—H bond in the C—SO2—NH—C(O) segment is anti with respect to the C=O bond (Fig.1), similar to that observed in N-(4-methylbenzoyl)-4-chlorobenzenesulfonamide (I) (Suchetan et al., 2010).
In the title compound, the molecules are twisted at the S–N bonds with the torsional angle of -67.0 (3)°, compared to the value of 69.0 (2)° in (I).
The dihedral angle between the sulfonyl benzene ring and the —SO2—NH—C—O segment is 79.6 (1)°, compared to the value of 77.2 (1)° in (I).
The dihedral angle between the sulfonyl and the benzoyl benzene rings is 89.3 (1)°, compared to the value of 89.5 (1)° in (I).
The packing of molecules linked by of N—H···O hydrogen bonds (Table 1) is shown in Fig. 2.