organic compounds
Methyl 3-hydroxy-4-oxo-3,4-dihydro-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide monohydrate
aDepartment of Chemistry, Government College University, Lahore, Pakistan, bDepartment of Physics, University of Sargodha, Sargodha, Pakistan, and cDepartment of Chemistry, University of Sargodha, Sargodha, Pakistan
*Correspondence e-mail: dmntahir_uos@yahoo.com
In the molecule of the title compound, C10H9NO6S·H2O, the benzothiazine ring adopts an An intramolecular N—H⋯O hydrogen bond results in the formation of a nonplanar five-membered ring which has a twisted conformation. In the intermolecular N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds link the molecules to form a three-dimensional network. There is a π–π contact between the benzene rings [centroid–centroid distance = 3.972 (2) Å].
Related literature
For general background, see: Shafiq, Khan et al. (2008); Shafiq, Tahir et al. (2008); Tahir et al. (2008). For related literature, see: Antsyshkina et al. (2003); Allen (2002). For bond-length data, see: Allen et al. (1987). For ring puckering parameters, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell APEX2; 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 for Windows (Farrugia, 1997) and PLATON (Spek, 2003); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON.
Supporting information
10.1107/S1600536808030948/hk2537sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808030948/hk2537Isup2.hkl
For the preparation of the title compound, methyl 4-hydroxy-2H-1,2 -benzothiazine-3-carboxylate 1,1-dioxide (0.5 g, 1.95 mmol), N-bromo- succinamide (0.38 g, 2.145 mmol) and dibenzoyl peroxide (0.035 g, 0.15 mmol) were added in CCl4 (10 ml). The mixture was refluxed for 2 h. After the completion of reaction, CCl4 was distilled off under vacuum. The obtained residue was washed with hot water to remove other impurities. The solid product was recrystallized in water and methanol to obtain the suitable crystals for x-ray analysis.
H atoms were located in difference syntheses and refined as [O-H = 0.84 (3) Å (for OH); O-H = 0.83 (3) and 0.83 (4) Å (for H2O); N-H = 0.78 (3) Å (for NH). The remaining H atoms were positioned geometrically, with C-H = 0.93 and 0.96 Å for aromatic and methyl H, respectively, and constrained to ride on their parent atoms with Uiso(H) = xUeq(C,N,O), where x = 1.5 for methyl H and x = 1.2 for all other H atoms.
Data collection: APEX2 (Bruker, 2007); cell
APEX2 (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 for Windows (Farrugia, 1997) and PLATON (Spek, 2003); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2003).Fig. 1. The molecular structure of the title molecule, with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. Hydrogen bonds are shown as dotted lines. | |
Fig. 2. A packing diagram of the title compound. Hydrogen bonds are shown as dashed lines. |
C10H9NO6S·H2O | F(000) = 1200 |
Mr = 289.26 | Dx = 1.616 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 2998 reflections |
a = 7.7504 (5) Å | θ = 3.0–28.5° |
b = 14.5638 (9) Å | µ = 0.30 mm−1 |
c = 21.0615 (14) Å | T = 296 K |
V = 2377.3 (3) Å3 | Prismatic, colourless |
Z = 8 | 0.24 × 0.18 × 0.15 mm |
Bruker Kappa APEXII CCD diffractometer | 2998 independent reflections |
Radiation source: fine-focus sealed tube | 1895 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.065 |
Detector resolution: 7.40 pixels mm-1 | θmax = 28.5°, θmin = 3.0° |
ω scans | h = −10→10 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −19→10 |
Tmin = 0.934, Tmax = 0.958 | l = −28→27 |
14889 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)] = 0.047 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.122 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0491P)2 + 1.1022P] where P = (Fo2 + 2Fc2)/3 |
2998 reflections | (Δ/σ)max < 0.001 |
184 parameters | Δρmax = 0.40 e Å−3 |
0 restraints | Δρmin = −0.32 e Å−3 |
C10H9NO6S·H2O | V = 2377.3 (3) Å3 |
Mr = 289.26 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 7.7504 (5) Å | µ = 0.30 mm−1 |
b = 14.5638 (9) Å | T = 296 K |
c = 21.0615 (14) Å | 0.24 × 0.18 × 0.15 mm |
Bruker Kappa APEXII CCD diffractometer | 2998 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 1895 reflections with I > 2σ(I) |
Tmin = 0.934, Tmax = 0.958 | Rint = 0.065 |
14889 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 0 restraints |
wR(F2) = 0.122 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | Δρmax = 0.40 e Å−3 |
2998 reflections | Δρmin = −0.32 e Å−3 |
184 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
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 | 0.18084 (8) | 0.12546 (4) | 0.08206 (3) | 0.0314 (2) | |
O1 | 0.0037 (3) | 0.32676 (13) | 0.21865 (9) | 0.0568 (8) | |
O2 | 0.3475 (2) | 0.15746 (13) | 0.06338 (9) | 0.0450 (7) | |
O3 | 0.1137 (3) | 0.04539 (12) | 0.05197 (9) | 0.0450 (6) | |
O4 | 0.2024 (2) | 0.33701 (12) | 0.09947 (10) | 0.0360 (6) | |
H4O | 0.204 (4) | 0.3501 (19) | 0.0608 (14) | 0.0432* | |
O5 | −0.0985 (3) | 0.42862 (12) | 0.08273 (10) | 0.0460 (7) | |
O6 | −0.2498 (2) | 0.30222 (13) | 0.10613 (9) | 0.0413 (6) | |
O7 | 0.7145 (3) | 0.10998 (15) | 0.02689 (11) | 0.0481 (7) | |
H71 | 0.731 (4) | 0.054 (2) | 0.0226 (15) | 0.0577* | |
H72 | 0.615 (5) | 0.116 (2) | 0.0412 (16) | 0.0577* | |
N1 | 0.0398 (3) | 0.20645 (14) | 0.07099 (10) | 0.0308 (6) | |
H1 | −0.052 (4) | 0.1857 (18) | 0.0675 (13) | 0.0370* | |
C1 | 0.1243 (3) | 0.17959 (16) | 0.20533 (12) | 0.0298 (7) | |
C2 | 0.1294 (4) | 0.16328 (19) | 0.27020 (13) | 0.0414 (9) | |
H2 | 0.09091 | 0.20830 | 0.29812 | 0.0497* | |
C3 | 0.1908 (4) | 0.0814 (2) | 0.29384 (14) | 0.0518 (10) | |
H3 | 0.19348 | 0.07164 | 0.33746 | 0.0623* | |
C4 | 0.2479 (5) | 0.0141 (2) | 0.25324 (15) | 0.0525 (10) | |
H4 | 0.28955 | −0.04093 | 0.26959 | 0.0629* | |
C5 | 0.2440 (4) | 0.02761 (18) | 0.18834 (14) | 0.0444 (9) | |
H5 | 0.28239 | −0.01804 | 0.16088 | 0.0533* | |
C6 | 0.1824 (3) | 0.10985 (16) | 0.16477 (12) | 0.0306 (7) | |
C7 | 0.0552 (3) | 0.26875 (16) | 0.18234 (12) | 0.0319 (8) | |
C8 | 0.0514 (3) | 0.28972 (15) | 0.11076 (11) | 0.0284 (7) | |
C9 | −0.1075 (3) | 0.35000 (17) | 0.09736 (12) | 0.0312 (8) | |
C10 | −0.4122 (3) | 0.3507 (2) | 0.10026 (15) | 0.0500 (10) | |
H10A | −0.50577 | 0.30900 | 0.10785 | 0.0750* | |
H10B | −0.42207 | 0.37576 | 0.05825 | 0.0750* | |
H10C | −0.41623 | 0.39963 | 0.13080 | 0.0750* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0315 (3) | 0.0292 (3) | 0.0334 (3) | 0.0025 (3) | 0.0002 (3) | −0.0061 (3) |
O1 | 0.0826 (16) | 0.0444 (11) | 0.0433 (12) | 0.0237 (12) | −0.0002 (11) | −0.0134 (9) |
O2 | 0.0328 (11) | 0.0479 (11) | 0.0544 (12) | 0.0054 (9) | 0.0128 (9) | −0.0020 (9) |
O3 | 0.0591 (13) | 0.0327 (9) | 0.0433 (11) | 0.0012 (9) | −0.0078 (10) | −0.0121 (8) |
O4 | 0.0240 (9) | 0.0376 (10) | 0.0463 (11) | −0.0060 (8) | −0.0014 (8) | −0.0029 (9) |
O5 | 0.0406 (12) | 0.0312 (10) | 0.0662 (14) | 0.0041 (8) | −0.0023 (10) | 0.0090 (9) |
O6 | 0.0220 (9) | 0.0402 (10) | 0.0618 (13) | −0.0003 (8) | 0.0007 (9) | 0.0062 (9) |
O7 | 0.0453 (13) | 0.0400 (10) | 0.0590 (14) | −0.0025 (10) | −0.0070 (10) | 0.0005 (10) |
N1 | 0.0258 (11) | 0.0296 (10) | 0.0370 (12) | −0.0008 (9) | −0.0049 (10) | −0.0052 (9) |
C1 | 0.0261 (12) | 0.0291 (12) | 0.0342 (13) | 0.0004 (10) | −0.0018 (10) | −0.0021 (10) |
C2 | 0.0470 (16) | 0.0411 (15) | 0.0362 (14) | 0.0006 (13) | 0.0007 (13) | −0.0049 (12) |
C3 | 0.063 (2) | 0.0559 (18) | 0.0364 (15) | 0.0002 (17) | −0.0064 (15) | 0.0089 (14) |
C4 | 0.067 (2) | 0.0393 (15) | 0.0513 (18) | 0.0054 (15) | −0.0086 (16) | 0.0110 (14) |
C5 | 0.0503 (17) | 0.0342 (14) | 0.0487 (17) | 0.0069 (13) | −0.0052 (14) | −0.0021 (13) |
C6 | 0.0269 (12) | 0.0317 (12) | 0.0332 (13) | 0.0008 (11) | −0.0037 (11) | −0.0016 (10) |
C7 | 0.0284 (13) | 0.0296 (12) | 0.0377 (14) | 0.0005 (10) | −0.0013 (11) | −0.0055 (11) |
C8 | 0.0240 (12) | 0.0257 (11) | 0.0356 (14) | −0.0001 (10) | −0.0027 (10) | −0.0041 (10) |
C9 | 0.0272 (13) | 0.0331 (13) | 0.0332 (14) | −0.0001 (11) | −0.0003 (10) | −0.0017 (10) |
C10 | 0.0234 (14) | 0.0674 (19) | 0.0591 (19) | 0.0118 (14) | −0.0015 (13) | 0.0030 (16) |
S1—O2 | 1.4284 (17) | C1—C7 | 1.486 (3) |
S1—O3 | 1.426 (2) | C1—C6 | 1.402 (3) |
S1—N1 | 1.625 (2) | C2—C3 | 1.377 (4) |
S1—C6 | 1.757 (3) | C3—C4 | 1.374 (4) |
O1—C7 | 1.207 (3) | C4—C5 | 1.381 (4) |
O4—C8 | 1.379 (3) | C5—C6 | 1.382 (4) |
O5—C9 | 1.188 (3) | C7—C8 | 1.539 (3) |
O6—C9 | 1.317 (3) | C8—C9 | 1.539 (3) |
O6—C10 | 1.449 (3) | C2—H2 | 0.9300 |
O4—H4O | 0.84 (3) | C3—H3 | 0.9300 |
O7—H71 | 0.83 (3) | C4—H4 | 0.9300 |
O7—H72 | 0.83 (4) | C5—H5 | 0.9300 |
N1—C8 | 1.477 (3) | C10—H10C | 0.9600 |
N1—H1 | 0.78 (3) | C10—H10A | 0.9600 |
C1—C2 | 1.387 (4) | C10—H10B | 0.9600 |
S1···H10Bi | 3.0600 | N1···O6 | 2.744 (3) |
O1···O4 | 2.949 (3) | N1···O7xii | 3.032 (3) |
O1···O6 | 3.099 (3) | C3···C5x | 3.570 (4) |
O1···C4ii | 3.406 (4) | C4···O1ix | 3.418 (4) |
O1···C4iii | 3.418 (4) | C4···O1xiii | 3.405 (4) |
O2···O4 | 2.946 (3) | C5···C3xi | 3.570 (4) |
O2···O7 | 3.027 (3) | C5···O4ix | 3.374 (3) |
O2···C9i | 3.405 (3) | C9···O2vii | 3.405 (3) |
O3···C10iv | 3.393 (3) | C10···O4xii | 2.994 (3) |
O3···O7v | 3.107 (3) | C10···O3xiv | 3.393 (3) |
O3···O3vi | 3.106 (3) | C10···H4Oxii | 3.09 (3) |
O4···O5 | 2.710 (3) | C10···H2x | 2.9800 |
O4···C5iii | 3.374 (3) | H1···O6 | 2.43 (3) |
O4···O7vii | 2.773 (3) | H1···O7xii | 2.29 (3) |
O4···O2 | 2.946 (3) | H2···H10Axi | 2.5800 |
O4···O1 | 2.949 (3) | H2···O1 | 2.5000 |
O4···C10viii | 2.994 (3) | H2···O6xi | 2.7300 |
O5···O7iii | 3.028 (3) | H2···C10xi | 2.9800 |
O5···O4 | 2.710 (3) | H3···O7x | 2.9200 |
O6···N1 | 2.744 (3) | H3···O5xiii | 2.7800 |
O6···O1 | 3.099 (3) | H4···H10Cxiii | 2.4700 |
O7···N1viii | 3.032 (3) | H4···O1ix | 2.7300 |
O7···O5ix | 3.028 (3) | H4O···C10viii | 3.09 (3) |
O7···O4i | 2.773 (3) | H4O···H10Aviii | 2.5300 |
O7···O3v | 3.107 (3) | H4O···O5 | 2.65 (3) |
O7···O2 | 3.027 (3) | H4O···O7vii | 1.94 (3) |
O1···H4iii | 2.7300 | H4O···H71vii | 2.25 (4) |
O1···H2 | 2.5000 | H4O···H72vii | 2.31 (4) |
O2···H72 | 2.21 (4) | H5···O3 | 2.8000 |
O2···H10Aviii | 2.6500 | H5···O4ix | 2.4800 |
O3···H10Bi | 2.6000 | H10A···O2xii | 2.6500 |
O3···H5 | 2.8000 | H10A···O4xii | 2.3100 |
O3···H71v | 2.45 (3) | H10A···H2x | 2.5800 |
O3···H10Biv | 2.8900 | H10A···H4Oxii | 2.5300 |
O4···H5iii | 2.4800 | H10B···S1vii | 3.0600 |
O4···H10Aviii | 2.3100 | H10B···O3vii | 2.6000 |
O5···H4O | 2.65 (3) | H10B···O5 | 2.6700 |
O5···H10B | 2.6700 | H10B···O3xiv | 2.8900 |
O5···H3ii | 2.7800 | H10C···O5 | 2.7000 |
O5···H72iii | 2.87 (3) | H10C···H4ii | 2.4700 |
O5···H10C | 2.7000 | H71···H4Oi | 2.25 (4) |
O5···H71iii | 2.45 (3) | H71···O3v | 2.45 (3) |
O6···H2x | 2.7300 | H71···O5ix | 2.45 (3) |
O6···H1 | 2.43 (3) | H72···O2 | 2.21 (4) |
O7···H1viii | 2.29 (3) | H72···H4Oi | 2.31 (5) |
O7···H4Oi | 1.94 (3) | H72···O5ix | 2.87 (3) |
O7···H3xi | 2.9200 | ||
O2—S1—O3 | 118.33 (12) | O1—C7—C8 | 118.4 (2) |
O2—S1—N1 | 109.39 (11) | O4—C8—N1 | 111.36 (19) |
O2—S1—C6 | 108.01 (11) | O4—C8—C7 | 104.59 (19) |
O3—S1—N1 | 106.53 (12) | O4—C8—C9 | 111.27 (18) |
O3—S1—C6 | 109.72 (11) | N1—C8—C7 | 113.20 (18) |
N1—S1—C6 | 103.94 (11) | N1—C8—C9 | 108.41 (19) |
C9—O6—C10 | 117.3 (2) | C7—C8—C9 | 107.96 (19) |
C8—O4—H4O | 107 (2) | O5—C9—C8 | 123.4 (2) |
H71—O7—H72 | 107 (3) | O6—C9—C8 | 110.1 (2) |
S1—N1—C8 | 118.28 (17) | O5—C9—O6 | 126.5 (2) |
C8—N1—H1 | 115 (2) | C3—C2—H2 | 120.00 |
S1—N1—H1 | 110 (2) | C1—C2—H2 | 120.00 |
C2—C1—C6 | 117.8 (2) | C2—C3—H3 | 120.00 |
C2—C1—C7 | 118.7 (2) | C4—C3—H3 | 120.00 |
C6—C1—C7 | 123.4 (2) | C5—C4—H4 | 120.00 |
C1—C2—C3 | 120.9 (3) | C3—C4—H4 | 120.00 |
C2—C3—C4 | 120.3 (3) | C4—C5—H5 | 120.00 |
C3—C4—C5 | 120.5 (3) | C6—C5—H5 | 120.00 |
C4—C5—C6 | 119.1 (3) | O6—C10—H10B | 109.00 |
S1—C6—C5 | 118.1 (2) | O6—C10—H10C | 109.00 |
S1—C6—C1 | 120.56 (18) | O6—C10—H10A | 110.00 |
C1—C6—C5 | 121.4 (2) | H10A—C10—H10C | 109.00 |
O1—C7—C1 | 121.6 (2) | H10B—C10—H10C | 109.00 |
C1—C7—C8 | 120.0 (2) | H10A—C10—H10B | 110.00 |
O2—S1—N1—C8 | −67.0 (2) | C2—C1—C7—C8 | 178.7 (2) |
O3—S1—N1—C8 | 163.98 (18) | C6—C1—C7—O1 | 178.8 (2) |
C6—S1—N1—C8 | 48.1 (2) | C6—C1—C7—C8 | −2.4 (3) |
O2—S1—C6—C1 | 94.5 (2) | C1—C2—C3—C4 | −0.2 (5) |
O2—S1—C6—C5 | −84.8 (2) | C2—C3—C4—C5 | −0.2 (5) |
O3—S1—C6—C1 | −135.2 (2) | C3—C4—C5—C6 | 0.2 (5) |
O3—S1—C6—C5 | 45.5 (2) | C4—C5—C6—S1 | 179.4 (2) |
N1—S1—C6—C1 | −21.6 (2) | C4—C5—C6—C1 | 0.1 (4) |
N1—S1—C6—C5 | 159.1 (2) | O1—C7—C8—O4 | 84.6 (3) |
C10—O6—C9—O5 | −3.0 (4) | O1—C7—C8—N1 | −154.0 (2) |
C10—O6—C9—C8 | 175.4 (2) | O1—C7—C8—C9 | −33.9 (3) |
S1—N1—C8—O4 | 64.3 (2) | C1—C7—C8—O4 | −94.2 (2) |
S1—N1—C8—C7 | −53.3 (3) | C1—C7—C8—N1 | 27.2 (3) |
S1—N1—C8—C9 | −173.01 (16) | C1—C7—C8—C9 | 147.2 (2) |
C6—C1—C2—C3 | 0.5 (4) | O4—C8—C9—O5 | −4.0 (3) |
C7—C1—C2—C3 | 179.4 (3) | O4—C8—C9—O6 | 177.6 (2) |
C2—C1—C6—S1 | −179.7 (2) | N1—C8—C9—O5 | −126.8 (3) |
C2—C1—C6—C5 | −0.4 (4) | N1—C8—C9—O6 | 54.8 (3) |
C7—C1—C6—S1 | 1.4 (3) | C7—C8—C9—O5 | 110.2 (3) |
C7—C1—C6—C5 | −179.3 (2) | C7—C8—C9—O6 | −68.2 (2) |
C2—C1—C7—O1 | −0.1 (4) |
Symmetry codes: (i) x+1/2, −y+1/2, −z; (ii) −x, y+1/2, −z+1/2; (iii) −x+1/2, y+1/2, z; (iv) −x−1/2, y−1/2, z; (v) −x+1, −y, −z; (vi) −x, −y, −z; (vii) x−1/2, −y+1/2, −z; (viii) x+1, y, z; (ix) −x+1/2, y−1/2, z; (x) x−1/2, y, −z+1/2; (xi) x+1/2, y, −z+1/2; (xii) x−1, y, z; (xiii) −x, y−1/2, −z+1/2; (xiv) −x−1/2, y+1/2, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O6 | 0.78 (3) | 2.43 (3) | 2.744 (3) | 106 (2) |
N1—H1···O7xii | 0.78 (3) | 2.29 (3) | 3.032 (3) | 162 (3) |
O4—H4O···O7vii | 0.84 (3) | 1.94 (3) | 2.773 (3) | 175 (2) |
O7—H71···O3v | 0.83 (3) | 2.45 (3) | 3.107 (3) | 137 (3) |
O7—H71···O5ix | 0.83 (3) | 2.45 (3) | 3.028 (3) | 128 (3) |
O7—H72···O2 | 0.83 (4) | 2.21 (4) | 3.027 (3) | 167 (3) |
C5—H5···O4ix | 0.9300 | 2.4800 | 3.374 (3) | 162.00 |
C10—H10A···O4xii | 0.9600 | 2.3100 | 2.994 (3) | 128.00 |
Symmetry codes: (v) −x+1, −y, −z; (vii) x−1/2, −y+1/2, −z; (ix) −x+1/2, y−1/2, z; (xii) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C10H9NO6S·H2O |
Mr | 289.26 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 296 |
a, b, c (Å) | 7.7504 (5), 14.5638 (9), 21.0615 (14) |
V (Å3) | 2377.3 (3) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.30 |
Crystal size (mm) | 0.24 × 0.18 × 0.15 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.934, 0.958 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14889, 2998, 1895 |
Rint | 0.065 |
(sin θ/λ)max (Å−1) | 0.670 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.047, 0.122, 1.01 |
No. of reflections | 2998 |
No. of parameters | 184 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.40, −0.32 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2003), WinGX (Farrugia, 1999) and PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O6 | 0.78 (3) | 2.43 (3) | 2.744 (3) | 106 (2) |
N1—H1···O7i | 0.78 (3) | 2.29 (3) | 3.032 (3) | 162 (3) |
O4—H4O···O7ii | 0.84 (3) | 1.94 (3) | 2.773 (3) | 175 (2) |
O7—H71···O3iii | 0.83 (3) | 2.45 (3) | 3.107 (3) | 137 (3) |
O7—H71···O5iv | 0.83 (3) | 2.45 (3) | 3.028 (3) | 128 (3) |
O7—H72···O2 | 0.83 (4) | 2.21 (4) | 3.027 (3) | 167 (3) |
C5—H5···O4iv | 0.9300 | 2.4800 | 3.374 (3) | 162.00 |
C10—H10A···O4i | 0.9600 | 2.3100 | 2.994 (3) | 128.00 |
Symmetry codes: (i) x−1, y, z; (ii) x−1/2, −y+1/2, −z; (iii) −x+1, −y, −z; (iv) −x+1/2, y−1/2, z. |
Acknowledgements
Muhammad Nadeem Arshad gratefully acknowledges the Higher Education Commission, Islamabad, Pakistan, for providing him with a scholarship under the Indigenous PhD Program (PIN 042-120607-PS2-183).
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.
The title compound has been prepared in continuation of research on benzo- thiazine derivatives (Shafiq, Khan et al., 2008; Shafiq, Tahir et al., 2008; Tahir et al., 2008) by our research group. The CCDC search (Allen, 2002) shows that a single crystal structure has been reported, in which the same benzothiazine ring exists (Antsyshkina et al., 2003). The title compound differs from the reported structure, due to the hydroxy and methylformate groups. Due to the hydroxy group, the S-configuration in the title compound has been confirmed.
In the molecule of the title compound (Fig. 1), the bond lengths (Allen et al., 1987) and angles are within normal ranges. Ring A (C1-C6) is, of course, planar. Ring B (S1/N1/C1/C6-C8) is not planar, having total puckering amplitude, QT, of 0.733 (3) Å and envelope conformation [ϕ = 21.21 (3)° and θ = 76.70 (3)°] (Cremer & Pople, 1975) with N1 atom displaced by 0.575 (3) Å from the plane of the other ring atoms. The intramolecular N-H···O hydrogen bond (Table 1) results in the formation of a nonplanar five-membered ring C (N1/O6/C8/C9/H1), having twisted conformation.
In the crystal structure, intermolecular N-H···O, O-H···O and C-H···O hydrogen bonds (Table 1) link the molecules to form a three dimensional network (Fig. 2), in which they may be effective in the stabilization of the structure. The π—π contact between the benzene rings, Cg2···Cg2i [symmetry code: (i) -1/2 + x, y, 1/2 - z, where Cg2 is the centroid of the ring A (C1-C6)] may further stabilize the structure, with centroid-centroid distance of 3.972 (2) Å.