organic compounds
N-(1,3-Benzothiazol-2-yl)acetamide
aDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India, bDepartment of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA, and cDepartment of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India
*Correspondence e-mail: jjasinski@keene.edu
The title compound, C9H8N2OS, crystallizes with two molecules (A and B) in the The dihedral angles between the mean planes of the 1,3-benzothiazol-2-yl ring system and the acetamide group are 2.7 (4) (molecule A) and 7.2 (2) Å (molecule B). In the crystal, pairs of N—H⋯N hydrogen bonds link the A and B molecules into dimers, generating R22(8) loops. The dimers stack along [100].
CCDC reference: 964881
Experimental
Crystal data
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Data collection: CrysAlis PRO (Agilent, 2012); cell CrysAlis PRO; data reduction: CrysAlis RED (Agilent, 2012); program(s) used to solve structure: SUPERFLIP (Palatinus & Chapuis, 2007); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2.
Supporting information
CCDC reference: 964881
10.1107/S160053681302730X/hb7144sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S160053681302730X/hb7144Isup2.hkl
Supporting information file. DOI: 10.1107/S160053681302730X/hb7144Isup3.cml
2-Aminobenzothiazole (1 mmol) were dissolved in a 30 ml acetic acid and it was refluxed for 3 hrs (Fig.3). The reaction mixture was cooled and poured into ice cold water. The precipitate obtained was obtained by filtration and recrystallized in ethanol. Colorless blocks were grown from methanol solution by the slow evaporation method and was used as such for X-ray studies (M.P.: 453-455 K).
All of the H atoms were placed in their calculated positions and then refined using the riding model with Atom—H lengths of 0.93Å (CH), 0.96Å (CH3) or 0.86Å (NH). Isotropic displacement parameters for these atoms were set to 1.2 (CH, NH) or 1.5 (CH3) times Ueq of the parent atom. Idealised methyl were refined as rotating groups.
Data collection: CrysAlis PRO (Agilent, 2012); cell
CrysAlis PRO (Agilent, 2012); data reduction: CrysAlis RED (Agilent, 2012); program(s) used to solve structure: SUPERFLIP (Palatinus & Chapuis, 2007); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2 (Dolomanov et al., 2009).C9H8N2OS | Dx = 1.479 Mg m−3 |
Mr = 192.24 | Melting point: 453 K |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 11.1852 (4) Å | Cell parameters from 5326 reflections |
b = 7.4037 (4) Å | θ = 3.3–32.7° |
c = 20.9189 (8) Å | µ = 0.33 mm−1 |
β = 94.408 (3)° | T = 173 K |
V = 1727.21 (13) Å3 | Block, colorless |
Z = 8 | 0.45 × 0.24 × 0.15 mm |
F(000) = 800 |
Agilent Xcalibur (Eos, Gemini) diffractometer | 5918 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 4622 reflections with I > 2σ(I) |
Detector resolution: 16.0416 pixels mm-1 | Rint = 0.033 |
ω scans | θmax = 32.8°, θmin = 3.3° |
Absorption correction: multi-scan CrysAlis PRO and CrysAlis RED, Agilent (2012). | h = −16→16 |
Tmin = 0.770, Tmax = 1.000 | k = −10→9 |
20845 measured reflections | l = −30→31 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.044 | H-atom parameters constrained |
wR(F2) = 0.109 | w = 1/[σ2(Fo2) + (0.045P)2 + 0.4973P] where P = (Fo2 + 2Fc2)/3 |
S = 1.08 | (Δ/σ)max = 0.001 |
5918 reflections | Δρmax = 0.44 e Å−3 |
237 parameters | Δρmin = −0.26 e Å−3 |
0 restraints |
C9H8N2OS | V = 1727.21 (13) Å3 |
Mr = 192.24 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 11.1852 (4) Å | µ = 0.33 mm−1 |
b = 7.4037 (4) Å | T = 173 K |
c = 20.9189 (8) Å | 0.45 × 0.24 × 0.15 mm |
β = 94.408 (3)° |
Agilent Xcalibur (Eos, Gemini) diffractometer | 5918 independent reflections |
Absorption correction: multi-scan CrysAlis PRO and CrysAlis RED, Agilent (2012). | 4622 reflections with I > 2σ(I) |
Tmin = 0.770, Tmax = 1.000 | Rint = 0.033 |
20845 measured reflections |
R[F2 > 2σ(F2)] = 0.044 | 0 restraints |
wR(F2) = 0.109 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.44 e Å−3 |
5918 reflections | Δρmin = −0.26 e Å−3 |
237 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes. |
x | y | z | Uiso*/Ueq | ||
S1A | 0.38148 (3) | 0.72688 (5) | 0.50197 (2) | 0.02464 (9) | |
O1A | 0.45185 (9) | 0.64286 (18) | 0.62295 (5) | 0.0349 (3) | |
N1A | 0.58652 (10) | 0.79642 (18) | 0.45587 (5) | 0.0242 (2) | |
N2A | 0.60552 (10) | 0.72112 (17) | 0.56435 (5) | 0.0232 (2) | |
H2A | 0.6815 | 0.7393 | 0.5650 | 0.028* | |
C1A | 0.53676 (11) | 0.75086 (19) | 0.50776 (6) | 0.0208 (3) | |
C2A | 0.49856 (11) | 0.8192 (2) | 0.40579 (6) | 0.0228 (3) | |
C3A | 0.51887 (13) | 0.8704 (2) | 0.34317 (7) | 0.0301 (3) | |
H3A | 0.5961 | 0.8949 | 0.3320 | 0.036* | |
C4A | 0.42227 (14) | 0.8841 (2) | 0.29819 (7) | 0.0315 (3) | |
H4A | 0.4349 | 0.9165 | 0.2563 | 0.038* | |
C5A | 0.30593 (13) | 0.8500 (2) | 0.31478 (7) | 0.0303 (3) | |
H5A | 0.2423 | 0.8596 | 0.2837 | 0.036* | |
C6A | 0.28360 (13) | 0.8024 (2) | 0.37647 (7) | 0.0284 (3) | |
H6A | 0.2059 | 0.7813 | 0.3876 | 0.034* | |
C7A | 0.38110 (12) | 0.7869 (2) | 0.42159 (6) | 0.0225 (3) | |
C8A | 0.55898 (12) | 0.6640 (2) | 0.61966 (6) | 0.0241 (3) | |
C9A | 0.64887 (14) | 0.6310 (2) | 0.67511 (7) | 0.0312 (3) | |
H9AA | 0.7267 | 0.6141 | 0.6597 | 0.047* | |
H9AB | 0.6268 | 0.5247 | 0.6977 | 0.047* | |
H9AC | 0.6508 | 0.7329 | 0.7035 | 0.047* | |
S1B | 1.06929 (3) | 0.76516 (5) | 0.50481 (2) | 0.02415 (9) | |
O1B | 0.99661 (9) | 0.63954 (18) | 0.38920 (5) | 0.0338 (3) | |
N1B | 0.86730 (10) | 0.77933 (17) | 0.55907 (5) | 0.0230 (2) | |
N2B | 0.84393 (10) | 0.70106 (17) | 0.45051 (5) | 0.0232 (2) | |
H2B | 0.7673 | 0.7064 | 0.4517 | 0.028* | |
C1B | 0.91433 (11) | 0.74614 (19) | 0.50500 (6) | 0.0200 (2) | |
C2B | 0.95787 (11) | 0.8261 (2) | 0.60567 (6) | 0.0210 (3) | |
C3B | 0.94173 (13) | 0.8677 (2) | 0.66959 (7) | 0.0288 (3) | |
H3B | 0.8654 | 0.8664 | 0.6844 | 0.035* | |
C4B | 1.04033 (14) | 0.9107 (2) | 0.71058 (7) | 0.0316 (3) | |
H4B | 1.0302 | 0.9376 | 0.7533 | 0.038* | |
C5B | 1.15469 (13) | 0.9140 (2) | 0.68865 (7) | 0.0303 (3) | |
H5B | 1.2198 | 0.9446 | 0.7169 | 0.036* | |
C6B | 1.17329 (12) | 0.8727 (2) | 0.62580 (7) | 0.0273 (3) | |
H6B | 1.2499 | 0.8745 | 0.6114 | 0.033* | |
C7B | 1.07368 (11) | 0.8283 (2) | 0.58475 (6) | 0.0219 (3) | |
C8B | 0.88922 (12) | 0.6480 (2) | 0.39429 (6) | 0.0242 (3) | |
C9B | 0.79789 (13) | 0.5998 (2) | 0.34107 (7) | 0.0300 (3) | |
H9BA | 0.7214 | 0.5827 | 0.3581 | 0.045* | |
H9BB | 0.8214 | 0.4902 | 0.3210 | 0.045* | |
H9BC | 0.7922 | 0.6954 | 0.3100 | 0.045* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1A | 0.01604 (15) | 0.0370 (2) | 0.02094 (15) | −0.00082 (13) | 0.00206 (11) | 0.00004 (13) |
O1A | 0.0235 (5) | 0.0539 (8) | 0.0277 (5) | −0.0055 (5) | 0.0038 (4) | 0.0070 (5) |
N1A | 0.0172 (5) | 0.0334 (7) | 0.0218 (5) | −0.0006 (4) | 0.0010 (4) | 0.0034 (5) |
N2A | 0.0165 (5) | 0.0327 (7) | 0.0203 (5) | −0.0008 (4) | 0.0007 (4) | 0.0012 (5) |
C1A | 0.0166 (5) | 0.0248 (7) | 0.0211 (6) | 0.0002 (5) | 0.0012 (4) | −0.0005 (5) |
C2A | 0.0187 (6) | 0.0268 (7) | 0.0226 (6) | 0.0007 (5) | 0.0003 (5) | 0.0013 (5) |
C3A | 0.0244 (7) | 0.0408 (9) | 0.0253 (7) | 0.0003 (6) | 0.0038 (5) | 0.0061 (6) |
C4A | 0.0329 (8) | 0.0394 (9) | 0.0222 (6) | 0.0038 (6) | 0.0014 (5) | 0.0054 (6) |
C5A | 0.0278 (7) | 0.0382 (9) | 0.0239 (6) | 0.0065 (6) | −0.0045 (5) | −0.0010 (6) |
C6A | 0.0201 (6) | 0.0391 (9) | 0.0256 (6) | 0.0033 (6) | −0.0010 (5) | −0.0024 (6) |
C7A | 0.0192 (6) | 0.0273 (7) | 0.0210 (6) | 0.0017 (5) | 0.0015 (4) | −0.0012 (5) |
C8A | 0.0243 (6) | 0.0273 (7) | 0.0206 (6) | −0.0008 (5) | 0.0015 (5) | −0.0001 (5) |
C9A | 0.0303 (7) | 0.0387 (9) | 0.0240 (7) | 0.0007 (6) | −0.0016 (5) | 0.0046 (6) |
S1B | 0.01533 (15) | 0.0370 (2) | 0.02013 (15) | −0.00067 (12) | 0.00165 (11) | −0.00226 (13) |
O1B | 0.0229 (5) | 0.0521 (8) | 0.0269 (5) | −0.0017 (5) | 0.0051 (4) | −0.0072 (5) |
N1B | 0.0174 (5) | 0.0326 (7) | 0.0190 (5) | 0.0015 (4) | 0.0010 (4) | −0.0006 (4) |
N2B | 0.0154 (5) | 0.0346 (7) | 0.0193 (5) | −0.0008 (4) | −0.0010 (4) | −0.0007 (5) |
C1B | 0.0154 (5) | 0.0247 (7) | 0.0199 (5) | 0.0008 (4) | 0.0002 (4) | 0.0008 (5) |
C2B | 0.0181 (6) | 0.0251 (7) | 0.0194 (6) | 0.0021 (5) | −0.0005 (4) | 0.0006 (5) |
C3B | 0.0244 (7) | 0.0398 (9) | 0.0223 (6) | 0.0002 (6) | 0.0030 (5) | −0.0037 (6) |
C4B | 0.0332 (8) | 0.0413 (9) | 0.0200 (6) | −0.0007 (6) | −0.0002 (5) | −0.0040 (6) |
C5B | 0.0277 (7) | 0.0366 (9) | 0.0252 (7) | −0.0039 (6) | −0.0065 (5) | −0.0018 (6) |
C6B | 0.0194 (6) | 0.0369 (9) | 0.0249 (6) | −0.0025 (5) | −0.0020 (5) | −0.0010 (6) |
C7B | 0.0191 (6) | 0.0255 (7) | 0.0209 (6) | 0.0006 (5) | 0.0001 (4) | 0.0006 (5) |
C8B | 0.0226 (6) | 0.0297 (8) | 0.0203 (6) | −0.0026 (5) | 0.0010 (5) | −0.0004 (5) |
C9B | 0.0310 (7) | 0.0377 (9) | 0.0208 (6) | −0.0051 (6) | −0.0014 (5) | −0.0038 (6) |
S1A—C1A | 1.7407 (13) | S1B—C1B | 1.7392 (13) |
S1A—C7A | 1.7390 (14) | S1B—C7B | 1.7333 (13) |
O1A—C8A | 1.2156 (17) | O1B—C8B | 1.2157 (16) |
N1A—C1A | 1.3018 (17) | N1B—C1B | 1.3068 (16) |
N1A—C2A | 1.3913 (17) | N1B—C2B | 1.3945 (17) |
N2A—H2A | 0.8600 | N2B—H2B | 0.8600 |
N2A—C1A | 1.3791 (17) | N2B—C1B | 1.3757 (16) |
N2A—C8A | 1.3715 (17) | N2B—C8B | 1.3733 (17) |
C2A—C3A | 1.3989 (19) | C2B—C3B | 1.3974 (18) |
C2A—C7A | 1.3997 (18) | C2B—C7B | 1.3988 (18) |
C3A—H3A | 0.9300 | C3B—H3B | 0.9300 |
C3A—C4A | 1.381 (2) | C3B—C4B | 1.381 (2) |
C4A—H4A | 0.9300 | C4B—H4B | 0.9300 |
C4A—C5A | 1.395 (2) | C4B—C5B | 1.392 (2) |
C5A—H5A | 0.9300 | C5B—H5B | 0.9300 |
C5A—C6A | 1.379 (2) | C5B—C6B | 1.381 (2) |
C6A—H6A | 0.9300 | C6B—H6B | 0.9300 |
C6A—C7A | 1.3910 (19) | C6B—C7B | 1.3928 (18) |
C8A—C9A | 1.4957 (19) | C8B—C9B | 1.4952 (19) |
C9A—H9AA | 0.9600 | C9B—H9BA | 0.9600 |
C9A—H9AB | 0.9600 | C9B—H9BB | 0.9600 |
C9A—H9AC | 0.9600 | C9B—H9BC | 0.9600 |
C7A—S1A—C1A | 88.25 (6) | C7B—S1B—C1B | 88.51 (6) |
C1A—N1A—C2A | 109.66 (11) | C1B—N1B—C2B | 109.42 (11) |
C1A—N2A—H2A | 118.3 | C1B—N2B—H2B | 118.2 |
C8A—N2A—H2A | 118.3 | C8B—N2B—H2B | 118.2 |
C8A—N2A—C1A | 123.41 (12) | C8B—N2B—C1B | 123.62 (11) |
N1A—C1A—S1A | 117.17 (10) | N1B—C1B—S1B | 117.01 (10) |
N1A—C1A—N2A | 120.74 (12) | N1B—C1B—N2B | 121.32 (12) |
N2A—C1A—S1A | 122.08 (10) | N2B—C1B—S1B | 121.66 (10) |
N1A—C2A—C3A | 125.57 (12) | N1B—C2B—C3B | 125.69 (12) |
N1A—C2A—C7A | 115.07 (12) | N1B—C2B—C7B | 115.13 (11) |
C3A—C2A—C7A | 119.36 (12) | C3B—C2B—C7B | 119.18 (12) |
C2A—C3A—H3A | 120.6 | C2B—C3B—H3B | 120.4 |
C4A—C3A—C2A | 118.89 (13) | C4B—C3B—C2B | 119.29 (13) |
C4A—C3A—H3A | 120.6 | C4B—C3B—H3B | 120.4 |
C3A—C4A—H4A | 119.6 | C3B—C4B—H4B | 119.7 |
C3A—C4A—C5A | 120.87 (13) | C3B—C4B—C5B | 120.63 (13) |
C5A—C4A—H4A | 119.6 | C5B—C4B—H4B | 119.7 |
C4A—C5A—H5A | 119.4 | C4B—C5B—H5B | 119.4 |
C6A—C5A—C4A | 121.23 (13) | C6B—C5B—C4B | 121.29 (13) |
C6A—C5A—H5A | 119.4 | C6B—C5B—H5B | 119.4 |
C5A—C6A—H6A | 121.1 | C5B—C6B—H6B | 121.1 |
C5A—C6A—C7A | 117.84 (13) | C5B—C6B—C7B | 117.86 (13) |
C7A—C6A—H6A | 121.1 | C7B—C6B—H6B | 121.1 |
C2A—C7A—S1A | 109.84 (10) | C2B—C7B—S1B | 109.90 (10) |
C6A—C7A—S1A | 128.36 (11) | C6B—C7B—S1B | 128.35 (10) |
C6A—C7A—C2A | 121.80 (12) | C6B—C7B—C2B | 121.74 (12) |
O1A—C8A—N2A | 121.82 (13) | O1B—C8B—N2B | 121.45 (12) |
O1A—C8A—C9A | 122.81 (13) | O1B—C8B—C9B | 123.07 (13) |
N2A—C8A—C9A | 115.37 (12) | N2B—C8B—C9B | 115.48 (12) |
C8A—C9A—H9AA | 109.5 | C8B—C9B—H9BA | 109.5 |
C8A—C9A—H9AB | 109.5 | C8B—C9B—H9BB | 109.5 |
C8A—C9A—H9AC | 109.5 | C8B—C9B—H9BC | 109.5 |
H9AA—C9A—H9AB | 109.5 | H9BA—C9B—H9BB | 109.5 |
H9AA—C9A—H9AC | 109.5 | H9BA—C9B—H9BC | 109.5 |
H9AB—C9A—H9AC | 109.5 | H9BB—C9B—H9BC | 109.5 |
N1A—C2A—C3A—C4A | 178.73 (15) | N1B—C2B—C3B—C4B | 179.62 (15) |
N1A—C2A—C7A—S1A | 0.23 (17) | N1B—C2B—C7B—S1B | −1.33 (16) |
N1A—C2A—C7A—C6A | −179.33 (14) | N1B—C2B—C7B—C6B | 179.88 (14) |
C1A—S1A—C7A—C2A | 0.29 (11) | C1B—S1B—C7B—C2B | 1.31 (11) |
C1A—S1A—C7A—C6A | 179.81 (15) | C1B—S1B—C7B—C6B | 180.00 (15) |
C1A—N1A—C2A—C3A | 179.14 (15) | C1B—N1B—C2B—C3B | −178.89 (15) |
C1A—N1A—C2A—C7A | −0.81 (19) | C1B—N1B—C2B—C7B | 0.50 (18) |
C1A—N2A—C8A—O1A | −3.1 (2) | C1B—N2B—C8B—O1B | −0.8 (2) |
C1A—N2A—C8A—C9A | 177.18 (14) | C1B—N2B—C8B—C9B | 178.36 (13) |
C2A—N1A—C1A—S1A | 1.07 (16) | C2B—N1B—C1B—S1B | 0.60 (16) |
C2A—N1A—C1A—N2A | −179.72 (13) | C2B—N1B—C1B—N2B | −178.39 (13) |
C2A—C3A—C4A—C5A | 0.9 (3) | C2B—C3B—C4B—C5B | 0.4 (3) |
C3A—C2A—C7A—S1A | −179.73 (12) | C3B—C2B—C7B—S1B | 178.10 (12) |
C3A—C2A—C7A—C6A | 0.7 (2) | C3B—C2B—C7B—C6B | −0.7 (2) |
C3A—C4A—C5A—C6A | 0.3 (3) | C3B—C4B—C5B—C6B | −0.7 (3) |
C4A—C5A—C6A—C7A | −0.9 (3) | C4B—C5B—C6B—C7B | 0.3 (2) |
C5A—C6A—C7A—S1A | −179.09 (13) | C5B—C6B—C7B—S1B | −178.14 (13) |
C5A—C6A—C7A—C2A | 0.4 (2) | C5B—C6B—C7B—C2B | 0.4 (2) |
C7A—S1A—C1A—N1A | −0.82 (12) | C7B—S1B—C1B—N1B | −1.16 (12) |
C7A—S1A—C1A—N2A | 179.98 (13) | C7B—S1B—C1B—N2B | 177.82 (12) |
C7A—C2A—C3A—C4A | −1.3 (2) | C7B—C2B—C3B—C4B | 0.2 (2) |
C8A—N2A—C1A—S1A | 2.6 (2) | C8B—N2B—C1B—S1B | 7.6 (2) |
C8A—N2A—C1A—N1A | −176.56 (14) | C8B—N2B—C1B—N1B | −173.46 (14) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2A—H2A···N1B | 0.86 | 2.11 | 2.9700 (16) | 176 |
N2B—H2B···N1A | 0.86 | 2.14 | 2.9749 (16) | 165 |
D—H···A | D—H | H···A | D···A | D—H···A |
N2A—H2A···N1B | 0.86 | 2.11 | 2.9700 (16) | 176 |
N2B—H2B···N1A | 0.86 | 2.14 | 2.9749 (16) | 165 |
Acknowledgements
BN thanks the UGC for financial assistance through BSR one time grant for the purchase of chemicals and DST–PURSE for financial assistance. HSY thanks University of Mysore for research facilities. JPJ acknowledges the NSF–MRI program (grant No. CHE-1039027) for funds to purchase the X-ray diffractometer.
References
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In continuation of our work on the synthesis of acetamide derivatives (Jasinski et al. 2013), we report herein the crystal structure of the title compound, C9H8N2OS, (I). Some of the related crystal structures of similar acetamide derivatives include, N-(3-chloro-4-fluorophenyl)acetamide, N-(4-bromophenyl)-2-(naphthalen-1- yl)acetamide and N-(3,5-dichlorophenyl)-2-(naphthalen-1-yl)acetamide (Fun et al. 2011a,b, 2012).
The title compound, (I) crystallizes with two independent molecules (A & B) in the asymmetric unit (Fig.1). The dihedral angle between the mean planes of the 1,3-benzothiazol-2-yl ring and the acetamide group is 2.7 (4)° (A) and 7.2 (2)Å (B),(Fig. 2). In the crystal, N—H···N hydrogen bonds forming R22(8) graph set motifs which link the molecules into dimers, which stack along [100].