organic compounds
N-(3-Methoxyphenyl)-tert-butanesulfinamide
aDepartment of Chemistry, KAIST, Daejeon 305-701, Republic of Korea, and bChemistry Department, Loughborough University, Loughborough LE11 3TU, England
*Correspondence e-mail: ajbuglass@kaist.ac.kr
In the title compound, C11H17NO2S, the molecules interact in a head-to-tail fashion through pairs of N—H⋯O hydrogen bonds, giving discrete centrosymmetric dimers. The N(H)S(O)tBu fragment is disordered over two sets of positions, with the major component comprising 90.0 (2)%.
Related literature
For N-arylalkanesulfinamides, see: Datta et al. (2008, 2009). For N-alkylalkanesulfinamides, see: Sato et al. (1975); Ferreira et al. (2005); Schuckmann et al. (1978). For the synthesis, see: Stretter et al. (1969).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2006); cell SAINT (Bruker, 2006); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL and local programs.
Supporting information
10.1107/S1600536809052507/ng2698sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809052507/ng2698Isup2.hkl
Compound (I) was prepared by the method of Stretter et al. (1969), using tert-butanesulfinyl chloride (281 mg, 2 mmol) and 3-methoxyaniline (492 mg, 4 mmol) in dry ether (20 ml). After 5 h (with TLC monitoring) the colourless solid amine salt was fitered off and the solvent was removed under reduced pressure. δ 7.13 (dd, J = 8.0, 8.5 Hz, 1H), 6.58–6.53 (m, 3H), 5.41 (bs, 1H), 3.75 (d, J = 0.6 Hz, 3H), 1.30 (s, 9H). 13C (100 MHz, CDCl3 p.p.m. with respect to TMS) δ 160.6, 143.3, 130.2, 110.6, 108.4, 104.2, 56.4. 55.2. 22.4. EIMS m/z (%) 228 (MH+, 85), 227 (M+, 25), 213 (17), 171 (MH+ - tBu, 100), 123 (MH+ - tBuSO, 6), 108 (MH+ - tBuSONH, 12), 95 (53). To our knowledge, these are the first reported analytical data for (I).
(silica gel, 1% methanol-dichloromethane) provided (I) as colourless crystals (430 mg, 95%), m.p. 367 K. Single crystals suitable for X-ray analysis were obtained by evaporation of a solution of (I) in dichloromethane:hexane (1:1) at room temperature. Spectroscopic analysis: FTIR (KBr) (cm-1) 3024, 1603, 1496, 1473, 1368, 1278, 1227, 1214, 1156, 1069, 953, 834. 1H NMR (400 MHz, CDCl3 p.p.m. with respect to TMS)H atoms were located in a difference Fourier map and refined geometrically using a riding model. Methyl groups were refined with rotational freedom. Lengths and displacement parameters were constrained as follows: C—H = 0.95–0.98 Å and Uiso(H) = 1.2 (1.5 for CH3) times Ueq(C, N). The minor disorder component was refined isotropically. The disorder was modelled with the aid of geometrical and displacement parameter restraints.
Data collection: APEX2 (Bruker, 2006); cell
SAINT (Bruker, 2006); data reduction: SAINT (Bruker, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and local programs.C11H17NO2S | F(000) = 488 |
Mr = 227.32 | Dx = 1.291 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 4390 reflections |
a = 12.4068 (13) Å | θ = 2.2–27.2° |
b = 7.3076 (8) Å | µ = 0.26 mm−1 |
c = 12.9230 (13) Å | T = 150 K |
β = 93.2992 (15)° | Block, colourless |
V = 1169.7 (2) Å3 | 0.37 × 0.22 × 0.20 mm |
Z = 4 |
Bruker APEXII CCD diffractometer | 2633 independent reflections |
Radiation source: fine-focus sealed tube | 2237 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.032 |
ω rotation with narrow frames scans | θmax = 27.3°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | h = −15→16 |
Tmin = 0.911, Tmax = 0.950 | k = −9→9 |
10627 measured reflections | l = −16→16 |
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)] = 0.042 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.117 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.056P)2 + 0.7085P] where P = (Fo2 + 2Fc2)/3 |
2633 reflections | (Δ/σ)max = 0.001 |
166 parameters | Δρmax = 0.62 e Å−3 |
149 restraints | Δρmin = −0.40 e Å−3 |
C11H17NO2S | V = 1169.7 (2) Å3 |
Mr = 227.32 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 12.4068 (13) Å | µ = 0.26 mm−1 |
b = 7.3076 (8) Å | T = 150 K |
c = 12.9230 (13) Å | 0.37 × 0.22 × 0.20 mm |
β = 93.2992 (15)° |
Bruker APEXII CCD diffractometer | 2633 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | 2237 reflections with I > 2σ(I) |
Tmin = 0.911, Tmax = 0.950 | Rint = 0.032 |
10627 measured reflections |
R[F2 > 2σ(F2)] = 0.042 | 149 restraints |
wR(F2) = 0.117 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.62 e Å−3 |
2633 reflections | Δρmin = −0.40 e Å−3 |
166 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 | Occ. (<1) | |
O1 | 0.54940 (10) | −0.05258 (18) | 0.36978 (10) | 0.0229 (3) | 0.900 (2) |
S1 | 0.50816 (3) | 0.13248 (6) | 0.33748 (3) | 0.01938 (15) | 0.900 (2) |
N1 | 0.42312 (12) | 0.2035 (3) | 0.42415 (12) | 0.0236 (4) | 0.900 (2) |
H1 | 0.4482 | 0.2281 | 0.4877 | 0.028* | 0.900 (2) |
C1 | 0.31128 (13) | 0.2253 (2) | 0.39789 (13) | 0.0253 (4) | |
C2 | 0.24035 (14) | 0.2103 (3) | 0.47687 (14) | 0.0277 (4) | |
H2 | 0.2669 | 0.1811 | 0.5453 | 0.033* | |
C3 | 0.13034 (14) | 0.2383 (3) | 0.45550 (14) | 0.0289 (4) | |
O2 | 0.06872 (11) | 0.2258 (3) | 0.54029 (11) | 0.0462 (4) | |
C11 | −0.04594 (16) | 0.2441 (4) | 0.52212 (19) | 0.0487 (6) | |
H11A | −0.0626 | 0.3643 | 0.4916 | 0.073* | |
H11B | −0.0808 | 0.2325 | 0.5879 | 0.073* | |
H11C | −0.0727 | 0.1480 | 0.4744 | 0.073* | |
C4 | 0.08935 (14) | 0.2716 (3) | 0.35566 (15) | 0.0300 (4) | |
H4 | 0.0140 | 0.2867 | 0.3407 | 0.036* | |
C5 | 0.16122 (16) | 0.2821 (3) | 0.27816 (15) | 0.0384 (5) | |
H5 | 0.1340 | 0.3040 | 0.2090 | 0.046* | |
C6 | 0.27117 (15) | 0.2620 (3) | 0.29758 (14) | 0.0328 (4) | |
H6 | 0.3188 | 0.2731 | 0.2429 | 0.039* | |
C7 | 0.62017 (14) | 0.2928 (3) | 0.36663 (14) | 0.0212 (4) | 0.900 (2) |
C8 | 0.57870 (17) | 0.4793 (3) | 0.32914 (18) | 0.0314 (5) | 0.900 (2) |
H8A | 0.5209 | 0.5198 | 0.3724 | 0.047* | 0.900 (2) |
H8B | 0.5507 | 0.4698 | 0.2569 | 0.047* | 0.900 (2) |
H8C | 0.6379 | 0.5682 | 0.3341 | 0.047* | 0.900 (2) |
C9 | 0.65533 (15) | 0.2918 (3) | 0.48138 (15) | 0.0262 (4) | 0.900 (2) |
H9A | 0.6810 | 0.1694 | 0.5015 | 0.039* | 0.900 (2) |
H9B | 0.5939 | 0.3248 | 0.5220 | 0.039* | 0.900 (2) |
H9C | 0.7137 | 0.3807 | 0.4945 | 0.039* | 0.900 (2) |
C10 | 0.7108 (2) | 0.2247 (6) | 0.3005 (2) | 0.0282 (7) | 0.900 (2) |
H10A | 0.7359 | 0.1048 | 0.3258 | 0.042* | 0.900 (2) |
H10B | 0.7710 | 0.3118 | 0.3054 | 0.042* | 0.900 (2) |
H10C | 0.6835 | 0.2141 | 0.2281 | 0.042* | 0.900 (2) |
O1X | 0.5509 (11) | 0.5520 (16) | 0.3695 (10) | 0.032 (3)* | 0.100 (2) |
S1X | 0.5084 (4) | 0.3681 (6) | 0.3374 (3) | 0.0303 (15)* | 0.100 (2) |
N1X | 0.4214 (12) | 0.288 (2) | 0.4216 (13) | 0.026 (4)* | 0.100 (2) |
H1X | 0.4450 | 0.2833 | 0.4871 | 0.032* | 0.100 (2) |
C7X | 0.6173 (12) | 0.204 (2) | 0.3663 (12) | 0.029 (4)* | 0.100 (2) |
C8X | 0.5762 (16) | 0.016 (2) | 0.3308 (16) | 0.034 (4)* | 0.100 (2) |
H8D | 0.5135 | −0.0179 | 0.3694 | 0.052* | 0.100 (2) |
H8E | 0.6335 | −0.0751 | 0.3436 | 0.052* | 0.100 (2) |
H8F | 0.5553 | 0.0197 | 0.2565 | 0.052* | 0.100 (2) |
C9X | 0.6514 (16) | 0.199 (3) | 0.4840 (12) | 0.032 (5)* | 0.100 (2) |
H9D | 0.6766 | 0.3204 | 0.5065 | 0.048* | 0.100 (2) |
H9E | 0.7096 | 0.1097 | 0.4964 | 0.048* | 0.100 (2) |
H9F | 0.5893 | 0.1635 | 0.5231 | 0.048* | 0.100 (2) |
C10X | 0.7138 (19) | 0.269 (4) | 0.308 (2) | 0.025 (8)* | 0.100 (2) |
H10D | 0.7374 | 0.3893 | 0.3344 | 0.038* | 0.100 (2) |
H10E | 0.6927 | 0.2793 | 0.2338 | 0.038* | 0.100 (2) |
H10F | 0.7731 | 0.1813 | 0.3179 | 0.038* | 0.100 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0234 (6) | 0.0218 (7) | 0.0233 (6) | 0.0001 (5) | 0.0005 (5) | 0.0005 (5) |
S1 | 0.0152 (2) | 0.0251 (2) | 0.0179 (2) | 0.00068 (16) | 0.00179 (14) | 0.00043 (17) |
N1 | 0.0151 (8) | 0.0366 (11) | 0.0193 (8) | 0.0024 (7) | 0.0019 (6) | 0.0015 (7) |
C1 | 0.0168 (8) | 0.0337 (10) | 0.0254 (9) | 0.0007 (6) | 0.0014 (6) | 0.0012 (7) |
C2 | 0.0215 (9) | 0.0385 (10) | 0.0230 (8) | −0.0003 (7) | 0.0009 (6) | 0.0003 (7) |
C3 | 0.0189 (8) | 0.0400 (10) | 0.0282 (9) | 0.0001 (7) | 0.0047 (7) | −0.0026 (7) |
O2 | 0.0164 (7) | 0.0900 (13) | 0.0327 (8) | 0.0034 (7) | 0.0060 (5) | 0.0010 (7) |
C11 | 0.0156 (9) | 0.0850 (19) | 0.0464 (12) | 0.0009 (10) | 0.0083 (8) | −0.0025 (12) |
C4 | 0.0180 (8) | 0.0380 (10) | 0.0336 (10) | 0.0047 (7) | −0.0021 (7) | −0.0017 (8) |
C5 | 0.0284 (10) | 0.0603 (14) | 0.0259 (9) | 0.0128 (9) | −0.0022 (7) | 0.0034 (9) |
C6 | 0.0243 (9) | 0.0504 (12) | 0.0241 (9) | 0.0076 (8) | 0.0050 (7) | 0.0068 (8) |
C7 | 0.0165 (8) | 0.0226 (10) | 0.0251 (9) | −0.0010 (7) | 0.0064 (6) | −0.0021 (8) |
C8 | 0.0282 (10) | 0.0240 (10) | 0.0431 (12) | 0.0031 (8) | 0.0109 (9) | 0.0028 (9) |
C9 | 0.0187 (9) | 0.0324 (12) | 0.0277 (10) | −0.0042 (8) | 0.0026 (7) | −0.0061 (8) |
C10 | 0.0195 (12) | 0.0340 (18) | 0.0321 (14) | 0.0012 (10) | 0.0109 (8) | −0.0028 (13) |
O1—S1 | 1.4967 (14) | C8—H8B | 0.9800 |
S1—N1 | 1.6652 (16) | C8—H8C | 0.9800 |
S1—C7 | 1.8401 (19) | C9—H9A | 0.9800 |
N1—C1 | 1.418 (2) | C9—H9B | 0.9800 |
N1—H1 | 0.8800 | C9—H9C | 0.9800 |
C1—C6 | 1.388 (3) | C10—H10A | 0.9800 |
C1—C2 | 1.390 (2) | C10—H10B | 0.9800 |
C1—N1X | 1.457 (16) | C10—H10C | 0.9800 |
C2—C3 | 1.392 (2) | O1X—S1X | 1.493 (12) |
C2—H2 | 0.9500 | S1X—N1X | 1.681 (13) |
C3—O2 | 1.375 (2) | S1X—C7X | 1.828 (13) |
C3—C4 | 1.381 (3) | N1X—H1X | 0.8800 |
O2—C11 | 1.435 (2) | C7X—C8X | 1.528 (16) |
C11—H11A | 0.9800 | C7X—C10X | 1.528 (16) |
C11—H11B | 0.9800 | C7X—C9X | 1.555 (15) |
C11—H11C | 0.9800 | C8X—H8D | 0.9800 |
C4—C5 | 1.381 (3) | C8X—H8E | 0.9800 |
C4—H4 | 0.9500 | C8X—H8F | 0.9800 |
C5—C6 | 1.381 (3) | C9X—H9D | 0.9800 |
C5—H5 | 0.9500 | C9X—H9E | 0.9800 |
C6—H6 | 0.9500 | C9X—H9F | 0.9800 |
C7—C9 | 1.522 (3) | C10X—H10D | 0.9800 |
C7—C8 | 1.526 (3) | C10X—H10E | 0.9800 |
C7—C10 | 1.534 (3) | C10X—H10F | 0.9800 |
C8—H8A | 0.9800 | ||
O1—S1—N1 | 108.28 (9) | H8B—C8—H8C | 109.5 |
O1—S1—C7 | 106.04 (8) | C7—C9—H9A | 109.5 |
N1—S1—C7 | 99.44 (9) | C7—C9—H9B | 109.5 |
C1—N1—S1 | 121.54 (13) | H9A—C9—H9B | 109.5 |
C1—N1—H1 | 119.2 | C7—C9—H9C | 109.5 |
S1—N1—H1 | 119.2 | H9A—C9—H9C | 109.5 |
C6—C1—C2 | 119.54 (16) | H9B—C9—H9C | 109.5 |
C6—C1—N1 | 122.58 (16) | C7—C10—H10A | 109.5 |
C2—C1—N1 | 117.88 (15) | C7—C10—H10B | 109.5 |
C6—C1—N1X | 114.7 (6) | H10A—C10—H10B | 109.5 |
C2—C1—N1X | 119.7 (6) | C7—C10—H10C | 109.5 |
C1—C2—C3 | 119.86 (16) | H10A—C10—H10C | 109.5 |
C1—C2—H2 | 120.1 | H10B—C10—H10C | 109.5 |
C3—C2—H2 | 120.1 | O1X—S1X—N1X | 111.3 (8) |
O2—C3—C4 | 124.38 (16) | O1X—S1X—C7X | 106.8 (8) |
O2—C3—C2 | 114.58 (16) | N1X—S1X—C7X | 97.7 (8) |
C4—C3—C2 | 121.03 (17) | C1—N1X—S1X | 127.0 (11) |
C3—O2—C11 | 117.06 (16) | C1—N1X—H1X | 116.5 |
O2—C11—H11A | 109.5 | S1X—N1X—H1X | 116.5 |
O2—C11—H11B | 109.5 | C8X—C7X—C10X | 112.9 (15) |
H11A—C11—H11B | 109.5 | C8X—C7X—C9X | 109.8 (14) |
O2—C11—H11C | 109.5 | C10X—C7X—C9X | 108.3 (16) |
H11A—C11—H11C | 109.5 | C8X—C7X—S1X | 107.4 (11) |
H11B—C11—H11C | 109.5 | C10X—C7X—S1X | 106.6 (14) |
C5—C4—C3 | 117.97 (16) | C9X—C7X—S1X | 111.8 (11) |
C5—C4—H4 | 121.0 | C7X—C8X—H8D | 109.5 |
C3—C4—H4 | 121.0 | C7X—C8X—H8E | 109.5 |
C6—C5—C4 | 122.33 (17) | H8D—C8X—H8E | 109.5 |
C6—C5—H5 | 118.8 | C7X—C8X—H8F | 109.5 |
C4—C5—H5 | 118.8 | H8D—C8X—H8F | 109.5 |
C5—C6—C1 | 119.20 (17) | H8E—C8X—H8F | 109.5 |
C5—C6—H6 | 120.4 | C7X—C9X—H9D | 109.5 |
C1—C6—H6 | 120.4 | C7X—C9X—H9E | 109.5 |
C9—C7—C8 | 112.73 (17) | H9D—C9X—H9E | 109.5 |
C9—C7—C10 | 111.27 (18) | C7X—C9X—H9F | 109.5 |
C8—C7—C10 | 110.95 (19) | H9D—C9X—H9F | 109.5 |
C9—C7—S1 | 111.54 (13) | H9E—C9X—H9F | 109.5 |
C8—C7—S1 | 105.49 (13) | C7X—C10X—H10D | 109.5 |
C10—C7—S1 | 104.40 (18) | C7X—C10X—H10E | 109.5 |
C7—C8—H8A | 109.5 | H10D—C10X—H10E | 109.5 |
C7—C8—H8B | 109.5 | C7X—C10X—H10F | 109.5 |
H8A—C8—H8B | 109.5 | H10D—C10X—H10F | 109.5 |
C7—C8—H8C | 109.5 | H10E—C10X—H10F | 109.5 |
H8A—C8—H8C | 109.5 | ||
O1—S1—N1—C1 | −113.14 (17) | N1X—C1—C6—C5 | −152.9 (8) |
C7—S1—N1—C1 | 136.38 (17) | O1—S1—C7—C9 | −59.63 (15) |
S1—N1—C1—C6 | −26.5 (3) | N1—S1—C7—C9 | 52.62 (15) |
S1—N1—C1—C2 | 154.05 (16) | O1—S1—C7—C8 | 177.66 (12) |
S1—N1—C1—N1X | −104.9 (15) | N1—S1—C7—C8 | −70.09 (14) |
C6—C1—C2—C3 | −2.1 (3) | O1—S1—C7—C10 | 60.64 (17) |
N1—C1—C2—C3 | 177.31 (18) | N1—S1—C7—C10 | 172.89 (16) |
N1X—C1—C2—C3 | 149.0 (8) | C6—C1—N1X—S1X | −10.0 (16) |
C1—C2—C3—O2 | −177.99 (17) | C2—C1—N1X—S1X | −162.5 (9) |
C1—C2—C3—C4 | 3.4 (3) | N1—C1—N1X—S1X | 105 (2) |
C4—C3—O2—C11 | 1.7 (3) | O1X—S1X—N1X—C1 | 125.7 (13) |
C2—C3—O2—C11 | −176.92 (19) | C7X—S1X—N1X—C1 | −122.9 (14) |
O2—C3—C4—C5 | 179.45 (19) | O1X—S1X—C7X—C8X | −178.2 (12) |
C2—C3—C4—C5 | −2.1 (3) | N1X—S1X—C7X—C8X | 66.7 (13) |
C3—C4—C5—C6 | −0.5 (3) | O1X—S1X—C7X—C10X | −57.0 (15) |
C4—C5—C6—C1 | 1.6 (3) | N1X—S1X—C7X—C10X | −172.0 (15) |
C2—C1—C6—C5 | −0.3 (3) | O1X—S1X—C7X—C9X | 61.2 (14) |
N1—C1—C6—C5 | −179.7 (2) | N1X—S1X—C7X—C9X | −53.9 (14) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1i | 0.88 | 2.24 | 2.884 (2) | 130 |
N1X—H1X···O1Xii | 0.88 | 2.21 | 2.94 (2) | 141 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C11H17NO2S |
Mr | 227.32 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 150 |
a, b, c (Å) | 12.4068 (13), 7.3076 (8), 12.9230 (13) |
β (°) | 93.2992 (15) |
V (Å3) | 1169.7 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.26 |
Crystal size (mm) | 0.37 × 0.22 × 0.20 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2007) |
Tmin, Tmax | 0.911, 0.950 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10627, 2633, 2237 |
Rint | 0.032 |
(sin θ/λ)max (Å−1) | 0.646 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.042, 0.117, 1.07 |
No. of reflections | 2633 |
No. of parameters | 166 |
No. of restraints | 149 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.62, −0.40 |
Computer programs: APEX2 (Bruker, 2006), SAINT (Bruker, 2006), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and local programs.
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1i | 0.88 | 2.24 | 2.884 (2) | 129.6 |
N1X—H1X···O1Xii | 0.88 | 2.21 | 2.94 (2) | 141.0 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+1, −y+1, −z+1. |
Acknowledgements
MD and AJB thank KAIST for financial assistance.
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The molecular structure of the title compound (I) exhibits disorder of the N(H)S(O)tBu fragment over two sets of positions. The major component comprises 90.0 (2)% (Fig. 1), in which the N—Caryl bond length is 1.418 (2) Å, similar to that [1.4225 (14) Å] in N-(4-methoxyphenyl)-tert-butanesulfinamide (Datta et al., 2009). The corresponding bond length [1.457 (16) Å] in the minor component is longer, though far less precisely determined. This perhaps suggests weaker delocalization of electrons over N and the aromatic ring, which would correlate with the greater non-coplanarity of the aromatic ring and sulfinyl moiety in this component. In either case, however, the N—Caryl bond is shorter than the N—Calkyl bonds [1.470–1.530 Å] observed in structures of N-alkylalkanesulfinamides (Sato et al., 1975; Schuckmann et al., 1978; Ferreira et al., 2005). The crystal packing of (I) shows head-to-tail interaction through NH···OS hydrogen bonds, forming discrete centrosymmetric dimers, as illustrated for the major component in Fig. 2. The hydrogen bonding data for both components are listed in Table 1. There is no evidence of hydrogen bonding involving the methoxy group, nor of weak CH···.OS hydrogen bonding, as observed in the packing of N-phenyladamantane-1-sulfinamide (Datta et al., 2008).