organic compounds
(E)-1-(2-Hydroxyphenyl)propan-2-one O-methyloxime forms hydrogen-bonded chains of edge-fused R(16) and R(24) rings
aSchool of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland, bDepartment of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, Scotland, and cInstituto de Química, Departamento de Química Inorgânica, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil
*Correspondence e-mail: cg@st-andrews.ac.uk
The title compound, C10H13NO2, crystallizes with Z′ = 2 in P. The molecules are linked by two O—H⋯N hydrogen bonds [H⋯O = 1.97 and 1.98 Å, O⋯N = 2.810 (2) and 2.815 (2) Å, and O—H⋯N = 175 and 174°] and by one C—H⋯O hydrogen bond [H⋯O = 2.50 Å, C⋯O = 3.313 (2) Å and C—H⋯O = 144°] into chains of edge-fused centrosymmetric rings in which (16) and (24) rings alternate.
Comment
The title compound, (I), was originally prepared as part of a study of the reactions of phenolic (Forrester et al., 1975). Its structure has now been determined in order to establish both the geometry at the oxime group and the nature of the supramolecular interactions.
Compound (I) crystallizes in P, with two independent molecules in the (Fig. 1). Both molecules have the E configuration at the C=N bond. The intramolecular dimensions are very similar in the two molecules, and the bond distances show no unusual features. The angles at the planar C atoms C18 and C28 show considerable variation from 120° (Table 1) and both of the C—N—O angles are substantially less than 120°. As shown by the leading torsion angles, the conformations of the two molecules are very similar.
The molecules of (I) are linked into a chain of edge-fused rings by the combination of two nearly linear O—H⋯N hydrogen bonds and one rather weak C—H⋯O hydrogen bond (Table 2). Within the phenolic atom O1 in the type 1 molecule (containing O1, etc.) acts as hydrogen-bond donor to oxime atom N28 in the type 2 molecule (containing O2, etc.) (Fig. 1), and in a similar way, phenolic atom O2 in the type 2 molecule at (x, y, z) acts as hydrogen-bond donor to oxime atom N18 in the type 1 molecule at (x, y, z − 1). The combination of these two hydrogen bonds then generates by translation a C22(14) (Bernstein et al., 1995) chain running parallel to the [001] direction (Fig. 2).
Two such chains, related to one another by inversion, pass through each x, y, z) acts as hydrogen-bond donor to phenolic atom O1 in the type 1 molecule at (1 − x, 1 − y, 1 − z), so generating by inversion an (16) ring centred at (,,). Propagation by translation and inversion of the (16) motif linking antiparallel C22(14) chains then generates an [001] chain of edge-fused rings, with (16) rings centred at (, , + n) (n = zero or integer) alternating with (24) rings centred at (, , n) (n = zero or integer) (Fig. 3).
and these two chains are weakly linked by the C—H⋯O hydrogen bond. Aryl atom C23 in the type 2 molecule at (There are no direction-specific interactions between adjacent chains of rings in (I). In particular, there are neither C—H⋯π(arene) hydrogen bonds nor aromatic π–π stacking interactions present in the structure.
Experimental
The title compound, (I), was prepared (Forrester et al., 1975) from 2-hydroxyphenylpropanone (Tinsley, 1959) and O-methylhydroxylamine. Crystals of (I) suitable for single-crystal X-ray diffraction were grown by slow evaporation of a solution in ethanol (m.p. 350–352 K).
Crystal data
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Data collection
Refinement
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Crystals of compound (I) are triclinic; P was selected and confirmed by the successful structure analysis. All H atoms were located from difference maps and subsequently treated as riding atoms, with C—H distances of 0.95 (aromatic), 0.98 (CH3) or 0.99 Å (CH2), and O—H distances of 0.84 Å, and with Uiso(H) = 1.2Ueq(C,O) or 1.5Ueq(methyl C).
Data collection: KappaCCD Server Software (Nonius, 1997); cell DENZO–SMN (Otwinowski & Minor, 1997); data reduction: DENZO–SMN; program(s) used to solve structure: OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: OSCAIL and SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 and PRPKAPPA (Ferguson, 1999).
Supporting information
10.1107/S0108270104003737/sk1704sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S0108270104003737/sk1704Isup2.hkl
Compound (I) was prepared (Forrester et al., 1975) from 2-hydroxyphenylpropanone (Tinsley, 1959) and O-methylhydroxylamine. Crystals of (I) suitable for single-crystal X-ray diffraction were grown by slow evaporation of a solution in ethanol (m.p. 350–352 K).
Crystals of compound (I) are triclinic. 1 was selected, and confirmed by the successful structure analysis. All H atoms were located from difference maps and subsequently treated as riding atoms, with C—H distances of 0.95 (aromatic), 0.98 (CH3) or 0.99 Å (CH2), and O—H distances of 0.84 Å, and with Uiso(H) = 1.2Ueq(C) or 1.2Ueq(O). Please check added text.
PData collection: KappaCCD Server Software (Nonius, 1997); cell
DENZO-SMN (Otwinowski & Minor, 1997); data reduction: DENZO-SMN; program(s) used to solve structure: OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: OSCAIL and SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97 and PRPKAPPA (Ferguson, 1999).C10H13NO2 | Z = 4 |
Mr = 179.21 | F(000) = 384 |
Triclinic, P1 | Dx = 1.211 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.3723 (2) Å | Cell parameters from 4492 reflections |
b = 9.4254 (2) Å | θ = 3.0–27.6° |
c = 12.3080 (3) Å | µ = 0.09 mm−1 |
α = 89.7146 (12)° | T = 120 K |
β = 68.5508 (11)° | Plate, colourless |
γ = 77.0903 (10)° | 0.20 × 0.20 × 0.04 mm |
V = 982.85 (4) Å3 |
Kappa-CCD diffractometer | 4492 independent reflections |
Radiation source: rotating anode | 3441 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.033 |
ϕ scans, and ω scans with κ offsets | θmax = 27.6°, θmin = 3.0° |
Absorption correction: multi-scan (SORTAV; Blessing 1995, 1997) | h = −12→12 |
Tmin = 0.978, Tmax = 0.997 | k = −12→12 |
8474 measured reflections | l = −15→15 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.051 | H-atom parameters constrained |
wR(F2) = 0.154 | w = 1/[σ2(Fo2) + (0.0707P)2 + 0.2766P] where P = (Fo2 + 2Fc2)/3 |
S = 1.09 | (Δ/σ)max < 0.001 |
4492 reflections | Δρmax = 0.32 e Å−3 |
240 parameters | Δρmin = −0.32 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.034 (6) |
C10H13NO2 | γ = 77.0903 (10)° |
Mr = 179.21 | V = 982.85 (4) Å3 |
Triclinic, P1 | Z = 4 |
a = 9.3723 (2) Å | Mo Kα radiation |
b = 9.4254 (2) Å | µ = 0.09 mm−1 |
c = 12.3080 (3) Å | T = 120 K |
α = 89.7146 (12)° | 0.20 × 0.20 × 0.04 mm |
β = 68.5508 (11)° |
Kappa-CCD diffractometer | 4492 independent reflections |
Absorption correction: multi-scan (SORTAV; Blessing 1995, 1997) | 3441 reflections with I > 2σ(I) |
Tmin = 0.978, Tmax = 0.997 | Rint = 0.033 |
8474 measured reflections |
R[F2 > 2σ(F2)] = 0.051 | 0 restraints |
wR(F2) = 0.154 | H-atom parameters constrained |
S = 1.09 | Δρmax = 0.32 e Å−3 |
4492 reflections | Δρmin = −0.32 e Å−3 |
240 parameters |
x | y | z | Uiso*/Ueq | ||
O1 | 0.39534 (15) | 0.36002 (12) | 0.57489 (10) | 0.0303 (3) | |
O2 | 0.55460 (14) | 0.17204 (13) | 0.03400 (10) | 0.0289 (3) | |
C11 | 0.32061 (19) | 0.26467 (17) | 0.64453 (13) | 0.0235 (3) | |
C12 | 0.38170 (19) | 0.20224 (17) | 0.72650 (14) | 0.0242 (3) | |
C13 | 0.3119 (2) | 0.09933 (19) | 0.79440 (15) | 0.0290 (4) | |
C14 | 0.1839 (2) | 0.0602 (2) | 0.78326 (16) | 0.0337 (4) | |
C15 | 0.1214 (2) | 0.1258 (2) | 0.70438 (15) | 0.0320 (4) | |
C16 | 0.1889 (2) | 0.22874 (18) | 0.63541 (14) | 0.0275 (4) | |
C17 | 0.5215 (2) | 0.24310 (17) | 0.74141 (15) | 0.0264 (4) | |
C18 | 0.65818 (19) | 0.11186 (17) | 0.71219 (14) | 0.0234 (3) | |
C19 | 0.7379 (2) | 0.0466 (2) | 0.58836 (14) | 0.0320 (4) | |
N18 | 0.69418 (15) | 0.06114 (14) | 0.79775 (12) | 0.0236 (3) | |
O18 | 0.82216 (13) | −0.06457 (12) | 0.76048 (10) | 0.0292 (3) | |
C20 | 0.8404 (2) | −0.1266 (2) | 0.86204 (17) | 0.0340 (4) | |
C21 | 0.64437 (19) | 0.24590 (17) | 0.06690 (14) | 0.0235 (3) | |
C22 | 0.58684 (19) | 0.30253 (16) | 0.18393 (14) | 0.0235 (3) | |
C23 | 0.6739 (2) | 0.38166 (18) | 0.21835 (15) | 0.0285 (4) | |
C24 | 0.8157 (2) | 0.40444 (19) | 0.14040 (17) | 0.0322 (4) | |
C25 | 0.8737 (2) | 0.34384 (18) | 0.02540 (16) | 0.0312 (4) | |
C26 | 0.7887 (2) | 0.26469 (18) | −0.01102 (14) | 0.0269 (4) | |
C27 | 0.4323 (2) | 0.28037 (17) | 0.27188 (14) | 0.0254 (4) | |
C28 | 0.30726 (19) | 0.42157 (17) | 0.30663 (13) | 0.0236 (3) | |
C29 | 0.2531 (2) | 0.4943 (2) | 0.21552 (15) | 0.0310 (4) | |
N28 | 0.25907 (16) | 0.47231 (14) | 0.41354 (12) | 0.0247 (3) | |
O28 | 0.14343 (14) | 0.60645 (13) | 0.43818 (10) | 0.0302 (3) | |
C30 | 0.0975 (2) | 0.6536 (2) | 0.55899 (15) | 0.0357 (4) | |
H1 | 0.3482 | 0.3917 | 0.5301 | 0.036* | |
H13 | 0.3532 | 0.0551 | 0.8496 | 0.035* | |
H14 | 0.1391 | −0.0114 | 0.8295 | 0.040* | |
H15 | 0.0323 | 0.1006 | 0.6973 | 0.038* | |
H16 | 0.1451 | 0.2746 | 0.5820 | 0.033* | |
H17A | 0.5533 | 0.3202 | 0.6893 | 0.032* | |
H17B | 0.4910 | 0.2824 | 0.8233 | 0.032* | |
H19A | 0.8470 | 0.0571 | 0.5573 | 0.048* | |
H19B | 0.6813 | 0.0970 | 0.5409 | 0.048* | |
H19C | 0.7377 | −0.0573 | 0.5857 | 0.048* | |
H20A | 0.8600 | −0.0541 | 0.9082 | 0.051* | |
H20B | 0.9298 | −0.2123 | 0.8380 | 0.051* | |
H20C | 0.7439 | −0.1561 | 0.9096 | 0.051* | |
H2 | 0.6009 | 0.1418 | −0.0371 | 0.035* | |
H23 | 0.6353 | 0.4213 | 0.2974 | 0.034* | |
H24 | 0.8723 | 0.4607 | 0.1653 | 0.039* | |
H25 | 0.9719 | 0.3567 | −0.0284 | 0.037* | |
H26 | 0.8292 | 0.2231 | −0.0896 | 0.032* | |
H27A | 0.3962 | 0.2074 | 0.2373 | 0.031* | |
H27B | 0.4489 | 0.2419 | 0.3424 | 0.031* | |
H29A | 0.2626 | 0.5958 | 0.2146 | 0.046* | |
H29B | 0.1427 | 0.4924 | 0.2338 | 0.046* | |
H29C | 0.3186 | 0.4423 | 0.1385 | 0.046* | |
H30A | 0.1888 | 0.6717 | 0.5727 | 0.054* | |
H30B | 0.0584 | 0.5776 | 0.6078 | 0.054* | |
H30C | 0.0140 | 0.7438 | 0.5792 | 0.054* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0409 (7) | 0.0296 (6) | 0.0294 (6) | −0.0130 (5) | −0.0207 (6) | 0.0091 (5) |
O2 | 0.0307 (7) | 0.0358 (7) | 0.0212 (6) | −0.0106 (5) | −0.0091 (5) | −0.0026 (5) |
C11 | 0.0275 (8) | 0.0199 (7) | 0.0204 (7) | −0.0023 (6) | −0.0078 (6) | −0.0015 (6) |
C12 | 0.0245 (8) | 0.0218 (7) | 0.0239 (8) | −0.0005 (6) | −0.0093 (7) | −0.0022 (6) |
C13 | 0.0274 (9) | 0.0313 (9) | 0.0266 (8) | −0.0029 (7) | −0.0104 (7) | 0.0057 (7) |
C14 | 0.0271 (9) | 0.0359 (9) | 0.0353 (10) | −0.0095 (8) | −0.0074 (8) | 0.0081 (8) |
C15 | 0.0224 (9) | 0.0378 (10) | 0.0333 (9) | −0.0063 (7) | −0.0080 (7) | −0.0023 (8) |
C16 | 0.0262 (9) | 0.0303 (8) | 0.0252 (8) | −0.0019 (7) | −0.0112 (7) | −0.0023 (7) |
C17 | 0.0315 (9) | 0.0225 (8) | 0.0283 (8) | −0.0047 (7) | −0.0159 (7) | 0.0018 (6) |
C18 | 0.0230 (8) | 0.0251 (8) | 0.0246 (8) | −0.0085 (6) | −0.0100 (6) | 0.0020 (6) |
C19 | 0.0328 (10) | 0.0369 (10) | 0.0233 (8) | −0.0068 (8) | −0.0081 (7) | −0.0008 (7) |
N18 | 0.0212 (7) | 0.0225 (7) | 0.0263 (7) | −0.0023 (5) | −0.0098 (6) | −0.0010 (5) |
O18 | 0.0243 (6) | 0.0278 (6) | 0.0315 (6) | 0.0029 (5) | −0.0110 (5) | −0.0013 (5) |
C20 | 0.0332 (10) | 0.0317 (9) | 0.0430 (10) | −0.0040 (7) | −0.0230 (8) | 0.0077 (8) |
C21 | 0.0263 (8) | 0.0220 (7) | 0.0248 (8) | −0.0047 (6) | −0.0131 (7) | 0.0037 (6) |
C22 | 0.0255 (8) | 0.0201 (7) | 0.0241 (8) | −0.0009 (6) | −0.0110 (7) | 0.0017 (6) |
C23 | 0.0330 (9) | 0.0240 (8) | 0.0291 (9) | −0.0008 (7) | −0.0156 (7) | −0.0025 (7) |
C24 | 0.0295 (9) | 0.0269 (8) | 0.0458 (10) | −0.0060 (7) | −0.0209 (8) | 0.0006 (8) |
C25 | 0.0244 (9) | 0.0284 (9) | 0.0402 (10) | −0.0057 (7) | −0.0118 (7) | 0.0077 (7) |
C26 | 0.0276 (9) | 0.0262 (8) | 0.0242 (8) | −0.0020 (7) | −0.0093 (7) | 0.0030 (6) |
C27 | 0.0306 (9) | 0.0235 (8) | 0.0210 (8) | −0.0057 (7) | −0.0088 (7) | 0.0012 (6) |
C28 | 0.0234 (8) | 0.0263 (8) | 0.0219 (8) | −0.0072 (6) | −0.0087 (6) | 0.0031 (6) |
C29 | 0.0322 (9) | 0.0362 (9) | 0.0247 (8) | −0.0043 (8) | −0.0133 (7) | 0.0040 (7) |
N28 | 0.0241 (7) | 0.0225 (7) | 0.0258 (7) | −0.0022 (5) | −0.0092 (6) | 0.0023 (5) |
O28 | 0.0288 (6) | 0.0288 (6) | 0.0269 (6) | 0.0041 (5) | −0.0096 (5) | −0.0005 (5) |
C30 | 0.0360 (10) | 0.0335 (9) | 0.0279 (9) | 0.0003 (8) | −0.0057 (8) | −0.0046 (7) |
O1—C11 | 1.367 (2) | O2—C21 | 1.368 (2) |
O1—H1 | 0.84 | O2—H2 | 0.84 |
C11—C16 | 1.393 (2) | C21—C26 | 1.392 (2) |
C11—C12 | 1.399 (2) | C21—C22 | 1.401 (2) |
C12—C13 | 1.394 (2) | C22—C23 | 1.389 (2) |
C12—C17 | 1.517 (2) | C22—C27 | 1.516 (2) |
C13—C14 | 1.383 (2) | C23—C24 | 1.388 (3) |
C13—H13 | 0.95 | C23—H23 | 0.95 |
C14—C15 | 1.384 (2) | C24—C25 | 1.390 (3) |
C14—H14 | 0.95 | C24—H24 | 0.95 |
C15—C16 | 1.391 (2) | C25—C26 | 1.387 (2) |
C15—H15 | 0.95 | C25—H25 | 0.95 |
C16—H16 | 0.95 | C26—H26 | 0.95 |
C17—C18 | 1.503 (2) | C27—C28 | 1.507 (2) |
C17—H17A | 0.99 | C27—H27A | 0.99 |
C17—H17B | 0.99 | C27—H27B | 0.99 |
C18—N18 | 1.278 (2) | C28—N28 | 1.280 (2) |
C18—C19 | 1.494 (2) | C28—C29 | 1.496 (2) |
C19—H19A | 0.98 | C29—H29A | 0.98 |
C19—H19B | 0.98 | C29—H29B | 0.98 |
C19—H19C | 0.98 | C29—H29C | 0.98 |
N18—O18 | 1.422 (2) | N28—O28 | 1.420 (2) |
O18—C20 | 1.428 (2) | O28—C30 | 1.431 (2) |
C20—H20A | 0.98 | C30—H30A | 0.98 |
C20—H20B | 0.98 | C30—H30B | 0.98 |
C20—H20C | 0.98 | C30—H30C | 0.98 |
C11—O1—H1 | 109.5 | C21—O2—H2 | 109.5 |
O1—C11—C16 | 122.20 (14) | O2—C21—C26 | 122.37 (14) |
O1—C11—C12 | 117.53 (14) | O2—C21—C22 | 117.59 (14) |
C16—C11—C12 | 120.26 (14) | C26—C21—C22 | 120.04 (15) |
C13—C12—C11 | 118.40 (14) | C23—C22—C21 | 118.52 (15) |
C13—C12—C17 | 120.10 (14) | C23—C22—C27 | 120.09 (14) |
C11—C12—C17 | 121.50 (14) | C21—C22—C27 | 121.39 (14) |
C14—C13—C12 | 121.51 (15) | C24—C23—C22 | 121.78 (16) |
C14—C13—H13 | 119.2 | C24—C23—H23 | 119.1 |
C12—C13—H13 | 119.2 | C22—C23—H23 | 119.1 |
C13—C14—C15 | 119.62 (16) | C23—C24—C25 | 119.06 (15) |
C13—C14—H14 | 120.2 | C23—C24—H24 | 120.5 |
C15—C14—H14 | 120.2 | C25—C24—H24 | 120.5 |
C14—C15—C16 | 120.05 (16) | C26—C25—C24 | 120.16 (16) |
C14—C15—H15 | 120.0 | C26—C25—H25 | 119.9 |
C16—C15—H15 | 120.0 | C24—C25—H25 | 119.9 |
C15—C16—C11 | 120.09 (15) | C25—C26—C21 | 120.38 (16) |
C15—C16—H16 | 120.0 | C25—C26—H26 | 119.8 |
C11—C16—H16 | 120.0 | C21—C26—H26 | 119.8 |
C18—C17—C12 | 110.43 (13) | C28—C27—C22 | 111.11 (13) |
C18—C17—H17A | 109.6 | C28—C27—H27A | 109.4 |
C12—C17—H17A | 109.6 | C22—C27—H27A | 109.4 |
C18—C17—H17B | 109.6 | C28—C27—H27B | 109.4 |
C12—C17—H17B | 109.6 | C22—C27—H27B | 109.4 |
H17A—C17—H17B | 108.1 | H27A—C27—H27B | 108.0 |
C17—C18—N18 | 116.52 (14) | C27—C28—N28 | 115.95 (13) |
C17—C18—C19 | 118.82 (14) | C27—C28—C29 | 119.00 (14) |
N18—C18—C19 | 124.62 (15) | N28—C28—C29 | 125.01 (15) |
C18—C19—H19A | 109.5 | C28—C29—H29A | 109.5 |
C18—C19—H19B | 109.5 | C28—C29—H29B | 109.5 |
H19A—C19—H19B | 109.5 | H29A—C29—H29B | 109.5 |
C18—C19—H19C | 109.5 | C28—C29—H29C | 109.5 |
H19A—C19—H19C | 109.5 | H29A—C29—H29C | 109.5 |
H19B—C19—H19C | 109.5 | H29B—C29—H29C | 109.5 |
C18—N18—O18 | 111.66 (13) | C28—N28—O28 | 112.21 (12) |
N18—O18—C20 | 108.27 (12) | N28—O28—C30 | 107.86 (12) |
O18—C20—H20A | 109.5 | O28—C30—H30A | 109.5 |
O18—C20—H20B | 109.5 | O28—C30—H30B | 109.5 |
H20A—C20—H20B | 109.5 | H30A—C30—H30B | 109.5 |
O18—C20—H20C | 109.5 | O28—C30—H30C | 109.5 |
H20A—C20—H20C | 109.5 | H30A—C30—H30C | 109.5 |
H20B—C20—H20C | 109.5 | H30B—C30—H30C | 109.5 |
O1—C11—C12—C13 | −176.92 (14) | O2—C21—C22—C23 | −178.10 (13) |
C16—C11—C12—C13 | 2.8 (2) | C26—C21—C22—C23 | 2.4 (2) |
O1—C11—C12—C17 | 2.5 (2) | O2—C21—C22—C27 | 1.2 (2) |
C16—C11—C12—C17 | −177.87 (15) | C26—C21—C22—C27 | −178.27 (14) |
C11—C12—C13—C14 | −0.9 (3) | C21—C22—C23—C24 | −0.6 (2) |
C17—C12—C13—C14 | 179.72 (16) | C27—C22—C23—C24 | −179.92 (15) |
C12—C13—C14—C15 | −1.0 (3) | C22—C23—C24—C25 | −1.3 (3) |
C13—C14—C15—C16 | 1.1 (3) | C23—C24—C25—C26 | 1.5 (2) |
C14—C15—C16—C11 | 0.8 (3) | C24—C25—C26—C21 | 0.3 (2) |
O1—C11—C16—C15 | 176.94 (15) | O2—C21—C26—C25 | 178.22 (14) |
C12—C11—C16—C15 | −2.7 (2) | C22—C21—C26—C25 | −2.3 (2) |
C13—C12—C17—C18 | 61.69 (19) | C23—C22—C27—C28 | 69.43 (18) |
C11—C12—C17—C18 | −117.67 (16) | C21—C22—C27—C28 | −109.88 (16) |
C12—C17—C18—N18 | −110.41 (16) | C22—C27—C28—N28 | −114.08 (16) |
C12—C17—C18—C19 | 67.29 (18) | C22—C27—C28—C29 | 63.76 (18) |
C17—C18—N18—O18 | 178.57 (12) | C27—C28—N28—O28 | 179.05 (12) |
C18—N18—O18—C20 | −171.79 (13) | C28—N28—O28—C30 | 179.96 (14) |
C19—C18—N18—O18 | 1.0 (2) | C29—C28—N28—O28 | 1.4 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N28 | 0.84 | 1.98 | 2.815 (2) | 174 |
O2—H2···N18i | 0.84 | 1.97 | 2.810 (2) | 175 |
C23—H23···O1ii | 0.95 | 2.50 | 3.313 (2) | 144 |
Symmetry codes: (i) x, y, z−1; (ii) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C10H13NO2 |
Mr | 179.21 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 120 |
a, b, c (Å) | 9.3723 (2), 9.4254 (2), 12.3080 (3) |
α, β, γ (°) | 89.7146 (12), 68.5508 (11), 77.0903 (10) |
V (Å3) | 982.85 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.20 × 0.20 × 0.04 |
Data collection | |
Diffractometer | Kappa-CCD diffractometer |
Absorption correction | Multi-scan (SORTAV; Blessing 1995, 1997) |
Tmin, Tmax | 0.978, 0.997 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8474, 4492, 3441 |
Rint | 0.033 |
(sin θ/λ)max (Å−1) | 0.651 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.154, 1.09 |
No. of reflections | 4492 |
No. of parameters | 240 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.32, −0.32 |
Computer programs: KappaCCD Server Software (Nonius, 1997), DENZO-SMN (Otwinowski & Minor, 1997), DENZO-SMN, OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997), OSCAIL and SHELXL97 (Sheldrick, 1997), PLATON (Spek, 2003), SHELXL97 and PRPKAPPA (Ferguson, 1999).
O1—C11 | 1.367 (2) | O2—C21 | 1.368 (2) |
C18—N18 | 1.278 (2) | C28—N28 | 1.280 (2) |
N18—O18 | 1.422 (2) | N28—O28 | 1.420 (2) |
C17—C18—N18 | 116.52 (14) | C27—C28—N28 | 115.95 (13) |
C17—C18—C19 | 118.82 (14) | C27—C28—C29 | 119.00 (14) |
N18—C18—C19 | 124.62 (15) | N28—C28—C29 | 125.01 (15) |
C18—N18—O18 | 111.66 (13) | C28—N28—O28 | 112.21 (12) |
N18—O18—C20 | 108.27 (12) | N28—O28—C30 | 107.86 (12) |
C11—C12—C17—C18 | −117.67 (16) | C21—C22—C27—C28 | −109.88 (16) |
C17—C18—N18—O18 | 178.57 (12) | C27—C28—N28—O28 | 179.05 (12) |
C18—N18—O18—C20 | −171.79 (13) | C28—N28—O28—C30 | 179.96 (14) |
C19—C18—N18—O18 | 1.0 (2) | C29—C28—N28—O28 | 1.4 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N28 | 0.84 | 1.98 | 2.815 (2) | 174 |
O2—H2···N18i | 0.84 | 1.97 | 2.810 (2) | 175 |
C23—H23···O1ii | 0.95 | 2.50 | 3.313 (2) | 144 |
Symmetry codes: (i) x, y, z−1; (ii) −x+1, −y+1, −z+1. |
Acknowledgements
X-ray data were collected at the EPSRC X-ray Crystallographic Service, University of Southampton, England; the authors thank the staff for all their help and advice. JNL thanks NCR Self-Service, Dundee, for grants which have provided computing facilities for this work, and JLW thanks CNPq and FAPERJ for financial support.
References
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The title compound, (I), was originally prepared as part of a study of the cyclization reactions of phenolic oximes (Forrester et al., 1975). Its structure has now been determined in order to establish both the geometry at the oxime group and the nature of the supramolecular interactions. \sch
Compound (I) crystallizes in space group P1, with two independent molecules in the asymmetric unit (Fig. 1). Both molecules have the (E) configuration at the C ═N bond; the intramolecular dimensions are very similar in the two molecules, and the bond distances show no unusual features. The angles at the planar C atoms C18 and C28 show considerable variation from 120° (Table 1) and both of the C—N—O angles are substantially less than 120°. As shown by the leading torsion angles, the conformations of the two molecules are very similar.
The molecules of (I) are linked into a chain of edge-fused rings by the combination of two nearly linear O—H···N hydrogen bonds and one rather weak C—H···O hydrogen bond (Table 2). Within the asymmetric unit, phenolic atom O1 in the type 1 molecule (containing O1, etc.) acts as hydrogen-bond donor to oxime atom N28 in the type 2 molecule (containing O2, etc.) (Fig. 1), and in a similar way, phenolic atom O2 in the type 2 molecule at (x, y, z) acts as hydrogen-bond donor to oxime atom N18 in the type 1 molecule at (x, y, z − 1). The combination of these two hydrogen bonds then generates by translation a C22(14) (Bernstein et al., 1995) chain running parallel to the [001] direction (Fig. 2).
Two such chains, related to one another by inversion, pass through each unit cell, and these two chains are weakly linked by the C—H···O hydrogen bond. Aryl atom C23 in the type 2 molecule at (x, y, z) acts as hydrogen-bond donor to phenolic atom O1 in the type 1 molecule at (1 − x, 1 − y, 1 − z), so generating by inversion an R44(16) ring centred at (1/2, 1/2, 1/2). Propagation by translation and inversion of the R44(16) motif linking antiparallel C22(14) chains then generates an [001] chain of edge-fused rings, with R44(16) rings centred at (1/2, 1/2, 1/2 + n) (n = zero or integer) alternating with R44(24) rings centred at (1/2, 1/2, n) (n = zero or integer) (Fig. 3).
There are no direction-specific interactions between adjacent chains of rings in (I). In particular, there are neither C—H···π(arene) hydrogen bonds nor aromatic π–π stacking interactions present in the structure.