organic compounds
Z)-1-hydroxy-3-(4-nitrophenyl)-3-oxoprop-1-en-1-yl]phenoxy}acetate
of ethyl 2-{2-[(1aChemistry and Environmental Division, Manchester Metropolitan University, Manchester M1 5GD, England, bChemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt, cDepartment of Chemistry, Tulane University, New Orleans, LA 70118, USA, dDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, eDepartment of Chemistry, Faculty of Science, Sohag University, 82524 Sohag, Egypt, and fKirkuk University, College of Science, Department of Chemistry, Kirkuk, Iraq
*Correspondence e-mail: shaabankamel@yahoo.com
The title compound, C19H17NO7, crystallized in a ratio of about 6:4 of the two possible keto–enol forms. This was observed as disorder over the central C3H2O2 unit. The dihedral angle between the rings is 8.2 (2)°.The molecules pack by C—H⋯O interactions in a layered fashion parallel to (-104).
Keywords: crystal structure; aryloxyphenoxy compounds; herbicides.
CCDC reference: 1434730
1. Related literature
For the use of aryloxyphenoxy compounds in various herbicidal applications, see: Zhu et al. (2006, 2009); Li (2004); Wang et al. (2004). For the synthesis of the title compund, see: Akkurt et al. (2015).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2014); cell SAINT (Bruker, 2014); data reduction: SAINT; program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 2012); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
CCDC reference: 1434730
https://doi.org/10.1107/S2056989015020794/qm2113sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989015020794/qm2113Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989015020794/qm2113Isup3.cml
The title compund was prepared according to our reported method (Akkurt et al., 2015). Suitable crystals were obtained by slow evaporation method of a solution of the title compund in ethanol.
H-atoms attached to carbon were placed in calculated positions (C—H = 0.95 - 0.99 Å). All were included as riding contributions with isotropic displacement parameters 1.2 - 1.5 times those of the attached atoms. From the equivalence of the C7—C8 and C8—C9 bond distances, the near equivalence of the C7—O3 and C9—O4 bond distances and the observance of only one peak attributable to a hydrogen attached to C8 in a difference map, it was concluded that the compound exists as the keto-enol tautomer with the enol hydrogen disordered between O3 and O4. Contoured difference maps calculated in the region between O3 and O4 showed an elongated region of density consistent with this assumption. The two components of the disordered hydrogen (H3a and H4a) were placed in positions consistent with forming intramolecular O—H···O hydrogen bonds and allowed to ride on the respective oxygen atoms.
Aryloxyphenoxy propionates are an important class of herbicides due to their high efficiency, broad spectrum, low toxicity and good selectivity (Zhu et al., 2006; Zhu et al., 2009). Thus, aryloxy-phenoxy propionate herbicides such as fluazifop-butyl, heloxyfop-methyl, quizalofop-ethyl and cyhalofop-butyl have been developed (Li, 2004), and are widely used to control gramineous weeds. In addition, some aryloxy-phenoxy acetates exhibit good herbicidal activity. For example, two substituted pyrazolo[3,4-d] pyrimidin-4-yloxy phenoxy acetates display considerable activities (Wang et al., 2004), with 100% inhibition against the root growth of Brassica napus L. Based on such facts, we report in this study the synthesis and crystal structural determination of the title compound.
In the title molecule, the dihedral angle between the C1–C6 ring and the mean plane of the central O3, C7, C8, C9, O4 unit is 2.8 (2)° while that between this latter plane and the C10–C15 ring is 8.2 (2)°. The molecule crystallized as a mixture of the two possible keto enol forms. This was observed as disorder over the central C3H2O2 unit. The molecules pack in a layered fashion (Figs. 2 and 3).
For the use of aryloxyphenoxy compounds in various herbicidal applications, see: Zhu et al. (2006, 2009); Li (2004); Wang et al. (2004). For the synthesis of the title compund, see: Akkurt et al. (2015).
Data collection: APEX2 (Bruker, 2014); cell
SAINT (Bruker, 2014); data reduction: SAINT (Bruker, 2014); program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 2012); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C19H17NO7 | F(000) = 776 |
Mr = 371.33 | Dx = 1.453 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
a = 4.7818 (10) Å | Cell parameters from 2496 reflections |
b = 16.260 (3) Å | θ = 2.3–26.7° |
c = 21.948 (5) Å | µ = 0.11 mm−1 |
β = 95.933 (3)° | T = 150 K |
V = 1697.4 (6) Å3 | Column, pale yellow |
Z = 4 | 0.24 × 0.08 × 0.03 mm |
Bruker SMART APEX CCD diffractometer | 3952 independent reflections |
Radiation source: fine-focus sealed tube | 1800 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.116 |
Detector resolution: 8.3660 pixels mm-1 | θmax = 27.9°, θmin = 1.6° |
φ and ω scans | h = −6→6 |
Absorption correction: multi-scan (SADABS; Bruker, 2014) | k = −20→20 |
Tmin = 0.60, Tmax = 1.00 | l = −28→28 |
15039 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)] = 0.072 | Hydrogen site location: mixed |
wR(F2) = 0.194 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0701P)2 + 0.4312P] where P = (Fo2 + 2Fc2)/3 |
3952 reflections | (Δ/σ)max < 0.001 |
245 parameters | Δρmax = 0.23 e Å−3 |
0 restraints | Δρmin = −0.29 e Å−3 |
C19H17NO7 | V = 1697.4 (6) Å3 |
Mr = 371.33 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 4.7818 (10) Å | µ = 0.11 mm−1 |
b = 16.260 (3) Å | T = 150 K |
c = 21.948 (5) Å | 0.24 × 0.08 × 0.03 mm |
β = 95.933 (3)° |
Bruker SMART APEX CCD diffractometer | 3952 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2014) | 1800 reflections with I > 2σ(I) |
Tmin = 0.60, Tmax = 1.00 | Rint = 0.116 |
15039 measured reflections |
R[F2 > 2σ(F2)] = 0.072 | 0 restraints |
wR(F2) = 0.194 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.23 e Å−3 |
3952 reflections | Δρmin = −0.29 e Å−3 |
245 parameters |
Experimental. The diffraction data were collected in three sets of 363 frames (0.5° width in ω) at φ = 0, 120 and 240°. A scan time of 120 sec/frame was used. |
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. H-atoms attached to carbon were placed in calculated positions (C—H = 0.95 - 0.99 Å). All were included as riding contributions with isotropic displacement parameters 1.2 - 1.5 times those of the attached atoms. From the equivalence of the C7—C8 and C8—C9 bond distances, the near equivalence of the C7—O3 and C9—O4 bond distances and the observance of only one peak attributable to a hydrogen attached to C8 in a difference map, it was concluded that the compound exists as the keto-enol tautomer with the enol hydrogen disordered between O3 and O4. Contoured difference maps calculated in the region between O3 and O4 showed an elongated region of density consistent with this assumption. The two components of the disordered hydrogen (H3a and H4a) were placed in positions consistent with forming intramolecular O—H···O hydrogen bonds and allowed to ride on the respective oxygen atoms. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 1.3713 (6) | 0.88831 (19) | 0.52969 (13) | 0.0660 (9) | |
O2 | 1.3341 (6) | 0.75575 (19) | 0.52420 (12) | 0.0568 (8) | |
O3 | 0.2970 (5) | 0.93367 (15) | 0.30167 (11) | 0.0469 (7) | |
H3A | 0.1539 | 0.9368 | 0.2746 | 0.070* | 0.4 |
O4 | −0.0854 (5) | 0.88128 (16) | 0.23034 (12) | 0.0559 (8) | |
H4A | 0.0513 | 0.9093 | 0.2485 | 0.084* | 0.6 |
O5 | −0.0494 (5) | 0.63587 (13) | 0.28606 (10) | 0.0391 (6) | |
O6 | 0.3347 (6) | 0.58820 (15) | 0.37708 (13) | 0.0575 (8) | |
O7 | 0.1989 (6) | 0.45723 (15) | 0.36325 (12) | 0.0539 (8) | |
N1 | 1.2619 (7) | 0.8252 (2) | 0.50788 (14) | 0.0482 (9) | |
C1 | 0.5850 (7) | 0.8492 (2) | 0.36892 (15) | 0.0324 (8) | |
C2 | 0.7260 (7) | 0.9186 (2) | 0.39276 (17) | 0.0412 (9) | |
H2 | 0.6703 | 0.9715 | 0.3775 | 0.049* | |
C3 | 0.9464 (8) | 0.9116 (2) | 0.43836 (17) | 0.0451 (10) | |
H3 | 1.0410 | 0.9591 | 0.4551 | 0.054* | |
C4 | 1.0263 (7) | 0.8345 (2) | 0.45906 (15) | 0.0368 (9) | |
C5 | 0.8938 (7) | 0.7638 (2) | 0.43615 (16) | 0.0398 (9) | |
H5 | 0.9535 | 0.7112 | 0.4510 | 0.048* | |
C6 | 0.6703 (7) | 0.7720 (2) | 0.39061 (15) | 0.0372 (9) | |
H6 | 0.5753 | 0.7244 | 0.3742 | 0.045* | |
C7 | 0.3471 (7) | 0.8596 (2) | 0.31935 (15) | 0.0321 (8) | |
C8 | 0.1895 (7) | 0.7929 (2) | 0.29482 (15) | 0.0329 (8) | |
H8 | 0.2333 | 0.7388 | 0.3091 | 0.039* | |
C9 | −0.0329 (7) | 0.8058 (2) | 0.24920 (15) | 0.0331 (8) | |
C10 | −0.2205 (7) | 0.7428 (2) | 0.21933 (15) | 0.0327 (8) | |
C11 | −0.4082 (7) | 0.7682 (2) | 0.16947 (15) | 0.0384 (9) | |
H11 | −0.4063 | 0.8241 | 0.1568 | 0.046* | |
C12 | −0.5941 (7) | 0.7148 (2) | 0.13854 (16) | 0.0440 (10) | |
H12 | −0.7185 | 0.7339 | 0.1049 | 0.053* | |
C13 | −0.6003 (8) | 0.6340 (2) | 0.15610 (16) | 0.0448 (10) | |
H13 | −0.7287 | 0.5969 | 0.1347 | 0.054* | |
C14 | −0.4184 (8) | 0.6064 (2) | 0.20538 (16) | 0.0437 (10) | |
H14 | −0.4233 | 0.5505 | 0.2177 | 0.052* | |
C15 | −0.2297 (7) | 0.6604 (2) | 0.23651 (15) | 0.0353 (8) | |
C16 | −0.0496 (8) | 0.5517 (2) | 0.30174 (16) | 0.0397 (9) | |
H16A | −0.0199 | 0.5176 | 0.2656 | 0.048* | |
H16B | −0.2324 | 0.5363 | 0.3160 | 0.048* | |
C17 | 0.1850 (8) | 0.5374 (2) | 0.35214 (16) | 0.0384 (9) | |
C18 | 0.4091 (8) | 0.4278 (2) | 0.41157 (17) | 0.0489 (10) | |
H18A | 0.5634 | 0.4683 | 0.4186 | 0.059* | |
H18B | 0.4899 | 0.3751 | 0.3990 | 0.059* | |
C19 | 0.2724 (9) | 0.4159 (3) | 0.46874 (18) | 0.0589 (12) | |
H19A | 0.1949 | 0.4683 | 0.4812 | 0.088* | |
H19B | 0.4117 | 0.3959 | 0.5013 | 0.088* | |
H19C | 0.1205 | 0.3755 | 0.4615 | 0.088* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0585 (19) | 0.076 (2) | 0.0572 (19) | −0.0132 (17) | −0.0234 (15) | −0.0046 (17) |
O2 | 0.0511 (18) | 0.073 (2) | 0.0420 (16) | 0.0133 (15) | −0.0162 (13) | 0.0053 (15) |
O3 | 0.0465 (15) | 0.0384 (15) | 0.0514 (17) | −0.0023 (12) | −0.0164 (13) | 0.0115 (12) |
O4 | 0.0570 (18) | 0.0470 (17) | 0.0582 (18) | −0.0019 (14) | −0.0211 (14) | 0.0137 (14) |
O5 | 0.0443 (15) | 0.0320 (14) | 0.0364 (14) | 0.0022 (11) | −0.0179 (12) | 0.0032 (11) |
O6 | 0.0611 (18) | 0.0403 (16) | 0.0629 (19) | −0.0073 (14) | −0.0321 (15) | 0.0070 (14) |
O7 | 0.0628 (18) | 0.0381 (16) | 0.0534 (17) | 0.0016 (13) | −0.0295 (14) | 0.0066 (13) |
N1 | 0.0387 (19) | 0.073 (3) | 0.0314 (18) | −0.0048 (19) | −0.0042 (15) | −0.0007 (18) |
C1 | 0.0299 (18) | 0.037 (2) | 0.0298 (18) | 0.0020 (16) | −0.0013 (15) | 0.0016 (16) |
C2 | 0.039 (2) | 0.041 (2) | 0.042 (2) | 0.0028 (17) | −0.0036 (18) | 0.0011 (17) |
C3 | 0.044 (2) | 0.047 (3) | 0.042 (2) | −0.0021 (19) | −0.0090 (18) | −0.0069 (19) |
C4 | 0.0300 (19) | 0.053 (2) | 0.0271 (19) | 0.0017 (17) | 0.0007 (15) | −0.0004 (17) |
C5 | 0.036 (2) | 0.045 (2) | 0.037 (2) | 0.0052 (17) | −0.0063 (17) | 0.0045 (18) |
C6 | 0.037 (2) | 0.039 (2) | 0.035 (2) | −0.0024 (16) | −0.0027 (16) | 0.0030 (17) |
C7 | 0.0322 (19) | 0.034 (2) | 0.0304 (19) | 0.0040 (16) | 0.0028 (16) | 0.0043 (16) |
C8 | 0.0305 (19) | 0.036 (2) | 0.0309 (19) | 0.0050 (15) | −0.0027 (15) | 0.0032 (15) |
C9 | 0.0340 (19) | 0.035 (2) | 0.0303 (19) | 0.0039 (16) | 0.0014 (16) | 0.0063 (16) |
C10 | 0.0294 (19) | 0.040 (2) | 0.0269 (18) | 0.0037 (15) | −0.0052 (14) | −0.0012 (15) |
C11 | 0.0312 (19) | 0.046 (2) | 0.035 (2) | 0.0057 (17) | −0.0073 (16) | 0.0066 (17) |
C12 | 0.037 (2) | 0.058 (3) | 0.034 (2) | 0.0027 (19) | −0.0115 (17) | 0.0007 (19) |
C13 | 0.043 (2) | 0.051 (3) | 0.037 (2) | −0.0009 (19) | −0.0102 (18) | −0.0066 (19) |
C14 | 0.047 (2) | 0.042 (2) | 0.039 (2) | 0.0005 (18) | −0.0119 (18) | 0.0003 (18) |
C15 | 0.0322 (19) | 0.045 (2) | 0.0265 (18) | 0.0078 (17) | −0.0056 (15) | −0.0019 (17) |
C16 | 0.040 (2) | 0.036 (2) | 0.039 (2) | 0.0007 (17) | −0.0130 (17) | 0.0023 (17) |
C17 | 0.045 (2) | 0.030 (2) | 0.037 (2) | 0.0020 (17) | −0.0077 (18) | 0.0056 (17) |
C18 | 0.052 (2) | 0.048 (2) | 0.043 (2) | 0.006 (2) | −0.0136 (19) | 0.0080 (19) |
C19 | 0.057 (3) | 0.068 (3) | 0.048 (3) | 0.007 (2) | −0.013 (2) | 0.000 (2) |
O1—N1 | 1.226 (4) | C7—C8 | 1.396 (5) |
O2—N1 | 1.224 (4) | C8—C9 | 1.399 (4) |
O3—C7 | 1.281 (4) | C8—H8 | 0.9500 |
O3—H3A | 0.8600 | C9—C10 | 1.470 (5) |
O4—C9 | 1.311 (4) | C10—C15 | 1.394 (5) |
O4—H4A | 0.8601 | C10—C11 | 1.404 (4) |
O5—C15 | 1.375 (4) | C11—C12 | 1.371 (5) |
O5—C16 | 1.412 (4) | C11—H11 | 0.9500 |
O6—C17 | 1.189 (4) | C12—C13 | 1.371 (5) |
O7—C17 | 1.327 (4) | C12—H12 | 0.9500 |
O7—C18 | 1.464 (4) | C13—C14 | 1.390 (5) |
N1—C4 | 1.480 (4) | C13—H13 | 0.9500 |
C1—C6 | 1.388 (4) | C14—C15 | 1.387 (5) |
C1—C2 | 1.390 (5) | C14—H14 | 0.9500 |
C1—C7 | 1.500 (5) | C16—C17 | 1.510 (5) |
C2—C3 | 1.381 (5) | C16—H16A | 0.9900 |
C2—H2 | 0.9500 | C16—H16B | 0.9900 |
C3—C4 | 1.374 (5) | C18—C19 | 1.486 (5) |
C3—H3 | 0.9500 | C18—H18A | 0.9900 |
C4—C5 | 1.381 (5) | C18—H18B | 0.9900 |
C5—C6 | 1.392 (5) | C19—H19A | 0.9800 |
C5—H5 | 0.9500 | C19—H19B | 0.9800 |
C6—H6 | 0.9500 | C19—H19C | 0.9800 |
C7—O3—H3A | 112.1 | C12—C11—C10 | 122.0 (3) |
C9—O4—H4A | 103.8 | C12—C11—H11 | 119.0 |
C15—O5—C16 | 117.3 (3) | C10—C11—H11 | 119.0 |
C17—O7—C18 | 118.2 (3) | C13—C12—C11 | 120.0 (3) |
O2—N1—O1 | 124.2 (3) | C13—C12—H12 | 120.0 |
O2—N1—C4 | 118.4 (3) | C11—C12—H12 | 120.0 |
O1—N1—C4 | 117.4 (3) | C12—C13—C14 | 119.9 (3) |
C6—C1—C2 | 119.4 (3) | C12—C13—H13 | 120.1 |
C6—C1—C7 | 121.6 (3) | C14—C13—H13 | 120.1 |
C2—C1—C7 | 118.9 (3) | C15—C14—C13 | 120.1 (4) |
C3—C2—C1 | 120.6 (3) | C15—C14—H14 | 120.0 |
C3—C2—H2 | 119.7 | C13—C14—H14 | 120.0 |
C1—C2—H2 | 119.7 | O5—C15—C14 | 121.9 (3) |
C4—C3—C2 | 118.7 (3) | O5—C15—C10 | 117.3 (3) |
C4—C3—H3 | 120.6 | C14—C15—C10 | 120.8 (3) |
C2—C3—H3 | 120.6 | O5—C16—C17 | 108.0 (3) |
C3—C4—C5 | 122.5 (3) | O5—C16—H16A | 110.1 |
C3—C4—N1 | 119.8 (3) | C17—C16—H16A | 110.1 |
C5—C4—N1 | 117.7 (3) | O5—C16—H16B | 110.1 |
C4—C5—C6 | 118.1 (3) | C17—C16—H16B | 110.1 |
C4—C5—H5 | 121.0 | H16A—C16—H16B | 108.4 |
C6—C5—H5 | 121.0 | O6—C17—O7 | 125.6 (3) |
C1—C6—C5 | 120.6 (3) | O6—C17—C16 | 126.7 (3) |
C1—C6—H6 | 119.7 | O7—C17—C16 | 107.7 (3) |
C5—C6—H6 | 119.7 | O7—C18—C19 | 109.0 (3) |
O3—C7—C8 | 122.5 (3) | O7—C18—H18A | 109.9 |
O3—C7—C1 | 115.5 (3) | C19—C18—H18A | 109.9 |
C8—C7—C1 | 122.1 (3) | O7—C18—H18B | 109.9 |
C7—C8—C9 | 120.0 (3) | C19—C18—H18B | 109.9 |
C7—C8—H8 | 120.0 | H18A—C18—H18B | 108.3 |
C9—C8—H8 | 120.0 | C18—C19—H19A | 109.5 |
O4—C9—C8 | 118.2 (3) | C18—C19—H19B | 109.5 |
O4—C9—C10 | 115.0 (3) | H19A—C19—H19B | 109.5 |
C8—C9—C10 | 126.8 (3) | C18—C19—H19C | 109.5 |
C15—C10—C11 | 117.2 (3) | H19A—C19—H19C | 109.5 |
C15—C10—C9 | 125.7 (3) | H19B—C19—H19C | 109.5 |
C11—C10—C9 | 117.0 (3) | ||
C6—C1—C2—C3 | −1.1 (5) | C8—C9—C10—C15 | 8.1 (6) |
C7—C1—C2—C3 | −179.9 (3) | O4—C9—C10—C11 | 7.8 (5) |
C1—C2—C3—C4 | 1.0 (6) | C8—C9—C10—C11 | −172.5 (3) |
C2—C3—C4—C5 | −0.2 (6) | C15—C10—C11—C12 | 0.0 (5) |
C2—C3—C4—N1 | 180.0 (3) | C9—C10—C11—C12 | −179.5 (3) |
O2—N1—C4—C3 | −177.9 (3) | C10—C11—C12—C13 | 0.0 (6) |
O1—N1—C4—C3 | 2.6 (5) | C11—C12—C13—C14 | 0.1 (6) |
O2—N1—C4—C5 | 2.3 (5) | C12—C13—C14—C15 | −0.4 (6) |
O1—N1—C4—C5 | −177.2 (3) | C16—O5—C15—C14 | 4.2 (5) |
C3—C4—C5—C6 | −0.4 (6) | C16—O5—C15—C10 | −177.2 (3) |
N1—C4—C5—C6 | 179.4 (3) | C13—C14—C15—O5 | 178.9 (3) |
C2—C1—C6—C5 | 0.5 (5) | C13—C14—C15—C10 | 0.4 (6) |
C7—C1—C6—C5 | 179.2 (3) | C11—C10—C15—O5 | −178.8 (3) |
C4—C5—C6—C1 | 0.2 (5) | C9—C10—C15—O5 | 0.6 (5) |
C6—C1—C7—O3 | −177.2 (3) | C11—C10—C15—C14 | −0.3 (5) |
C2—C1—C7—O3 | 1.6 (5) | C9—C10—C15—C14 | 179.2 (3) |
C6—C1—C7—C8 | 3.6 (5) | C15—O5—C16—C17 | 173.6 (3) |
C2—C1—C7—C8 | −177.7 (3) | C18—O7—C17—O6 | 2.1 (6) |
O3—C7—C8—C9 | −0.1 (5) | C18—O7—C17—C16 | −178.9 (3) |
C1—C7—C8—C9 | 179.1 (3) | O5—C16—C17—O6 | 4.0 (6) |
C7—C8—C9—O4 | 0.5 (5) | O5—C16—C17—O7 | −175.0 (3) |
C7—C8—C9—C10 | −179.2 (3) | C17—O7—C18—C19 | 97.7 (4) |
O4—C9—C10—C15 | −171.6 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8···O5 | 0.95 | 2.18 | 2.796 (4) | 122 |
C16—H16A···O3i | 0.99 | 2.35 | 3.295 (5) | 160 |
O3—H3A···O4 | 0.86 | 1.69 | 2.435 (3) | 144 |
O4—H4A···O3 | 0.86 | 1.62 | 2.435 (3) | 158 |
Symmetry code: (i) −x+1/2, y−1/2, −z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8···O5 | 0.95 | 2.18 | 2.796 (4) | 122 |
C16—H16A···O3i | 0.99 | 2.35 | 3.295 (5) | 160 |
O3—H3A···O4 | 0.86 | 1.69 | 2.435 (3) | 144 |
O4—H4A···O3 | 0.86 | 1.62 | 2.435 (3) | 158 |
Symmetry code: (i) −x+1/2, y−1/2, −z+1/2. |
Acknowledgements
JTM thanks Tulane University for support of the Tulane Crystallography Laboratory.
References
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Aryloxyphenoxy propionates are an important class of herbicides due to their high efficiency, broad spectrum, low toxicity and good selectivity (Zhu et al., 2006; Zhu et al., 2009). Thus, aryloxy-phenoxy propionate herbicides such as fluazifop-butyl, heloxyfop-methyl, quizalofop-ethyl and cyhalofop-butyl have been developed (Li, 2004), and are widely used to control gramineous weeds. In addition, some aryloxy-phenoxy acetates exhibit good herbicidal activity. For example, two substituted pyrazolo[3,4-d] pyrimidin-4-yloxy phenoxy acetates display considerable activities (Wang et al., 2004), with 100% inhibition against the root growth of Brassica napus L. Based on such facts, we report in this study the synthesis and crystal structural determination of the title compound.
In the title molecule, the dihedral angle between the C1–C6 ring and the mean plane of the central O3, C7, C8, C9, O4 unit is 2.8 (2)° while that between this latter plane and the C10–C15 ring is 8.2 (2)°. The molecule crystallized as a mixture of the two possible keto enol forms. This was observed as disorder over the central C3H2O2 unit. The molecules pack in a layered fashion (Figs. 2 and 3).