For the two molecules in the asymmetric unit of the title compound, C
8H
9NO
3, the dihedral angles between the mean planes of the benzene ring and the hydroxamic acid group are 4.50 (16) and 10.10 (11)°. The supramolecular aggregation is effected by the formation of two-dimensional networks of N—H
O and O—H
O interactions in addition to C—H
O and π–π interactions.
Supporting information
CCDC reference: 628032
Key indicators
- Single-crystal X-ray study
- T = 160 K
- Mean (C-C) = 0.003 Å
- R factor = 0.060
- wR factor = 0.156
- Data-to-parameter ratio = 10.7
checkCIF/PLATON results
No syntax errors found
Alert level B
PLAT417_ALERT_2_B Short Inter D-H..H-D H10 .. H22 .. 2.02 Ang.
Alert level C
PLAT353_ALERT_3_C Long N-H Bond (0.87A) N20 - H20 ... 1.05 Ang.
0 ALERT level A = In general: serious problem
1 ALERT level B = Potentially serious problem
1 ALERT level C = Check and explain
0 ALERT level G = General alerts; check
0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
1 ALERT type 2 Indicator that the structure model may be wrong or deficient
1 ALERT type 3 Indicator that the structure quality may be low
0 ALERT type 4 Improvement, methodology, query or suggestion
0 ALERT type 5 Informative message, check
checkCIF publication errors
Alert level A
PUBL024_ALERT_1_A The number of authors is greater than 5.
Please specify the role of each of the co-authors
for your paper.
| Author Response: Role played by each named author is given below.
Nagarajan Vembu - Crystallization, Structure solution & refinement,
Paper writing
Anthony Linden - Data collection and suggestions for improving the quality
of the manuscript with special reference to the H-bonding discussion in the
comment section
Jean Lee - Synthesis of the compound
John G. Kelly, Kevin B. Nolan and Marc Devocelle - Planned and advised on
synthetic methodology
|
1 ALERT level A = Data missing that is essential or data in wrong format
0 ALERT level G = General alerts. Data that may be required is missing
Data collection: COLLECT (Nonius, 2000); cell refinement: DENZO–SMN (Otwinowski & Minor, 1997); data reduction: DENZO–SMN and SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: SHELXL97.
2-methoxybenzohydroxamic acid
top
Crystal data top
C8H9NO3 | F(000) = 704 |
Mr = 167.16 | Dx = 1.410 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3187 reflections |
a = 11.1348 (4) Å | θ = 2.0–26.0° |
b = 16.7669 (6) Å | µ = 0.11 mm−1 |
c = 8.8110 (3) Å | T = 160 K |
β = 106.761 (2)° | Prism, orange |
V = 1575.09 (10) Å3 | 0.25 × 0.20 × 0.15 mm |
Z = 8 | |
Data collection top
Nonius KappaCCD area-detector diffractometer | 2461 reflections with I > 2σ(I) |
Radiation source: Nonius FR590 sealed-tube generator | Rint = 0.055 |
Horizontally mounted graphite crystal monochromator | θmax = 26.0°, θmin = 2.4° |
Detector resolution: 9 pixels mm-1 | h = −13→13 |
φ and ω scans | k = −20→0 |
22727 measured reflections | l = 0→10 |
3093 independent reflections | |
Refinement top
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.060 | All H-atom parameters refined |
wR(F2) = 0.156 | w = 1/[σ2(Fo2) + (0.0749P)2 + 0.4768P] where P = (Fo2 + 2Fc2)/3 |
S = 1.17 | (Δ/σ)max = 0.001 |
3092 reflections | Δρmax = 0.52 e Å−3 |
290 parameters | Δρmin = −0.31 e Å−3 |
0 restraints | Extinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.116 (9) |
Special details top
Experimental. Solvent used: MeOH Cooling Device: Oxford Cryosystems Cryostream 700 Crystal
mount: glued on a glass fibre Mosaicity (°.): 1.232 (2) Frames collected: 436
Seconds exposure per frame: 95 Degrees rotation per frame: 1.0
Crystal-Detector distance (mm): 30.0 |
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
C1 | 0.46877 (17) | 0.67641 (11) | −0.0589 (2) | 0.0328 (5) | |
C2 | 0.52475 (18) | 0.74741 (11) | −0.0887 (2) | 0.0357 (5) | |
C3 | 0.6290 (2) | 0.74394 (15) | −0.1456 (3) | 0.0471 (6) | |
C4 | 0.6764 (2) | 0.67180 (16) | −0.1742 (3) | 0.0529 (6) | |
C5 | 0.6213 (2) | 0.60167 (15) | −0.1493 (3) | 0.0493 (6) | |
C6 | 0.5179 (2) | 0.60461 (13) | −0.0919 (2) | 0.0409 (5) | |
C7 | 0.36093 (18) | 0.67076 (11) | 0.0098 (2) | 0.0334 (5) | |
N8 | 0.31835 (16) | 0.73676 (11) | 0.0562 (2) | 0.0407 (5) | |
O9 | 0.31837 (15) | 0.60465 (8) | 0.0319 (2) | 0.0498 (5) | |
O10 | 0.21762 (15) | 0.73401 (10) | 0.1197 (2) | 0.0499 (5) | |
O11 | 0.47187 (14) | 0.81691 (8) | −0.06089 (19) | 0.0446 (4) | |
C12 | 0.5254 (3) | 0.89086 (15) | −0.0897 (4) | 0.0529 (6) | |
H3 | 0.664 (3) | 0.7882 (16) | −0.160 (3) | 0.054 (7)* | |
H4 | 0.751 (3) | 0.6713 (16) | −0.214 (3) | 0.069 (8)* | |
H5 | 0.654 (2) | 0.5536 (15) | −0.172 (3) | 0.057 (7)* | |
H6 | 0.476 (2) | 0.5547 (13) | −0.072 (3) | 0.044 (6)* | |
H8 | 0.332 (2) | 0.7856 (17) | 0.027 (3) | 0.058 (7)* | |
H10 | 0.221 (3) | 0.6870 (19) | 0.182 (4) | 0.078 (9)* | |
H12A | 0.523 (3) | 0.8932 (16) | −0.197 (4) | 0.066 (8)* | |
H12B | 0.608 (3) | 0.8954 (15) | −0.014 (3) | 0.054 (7)* | |
H12C | 0.471 (3) | 0.9292 (16) | −0.068 (3) | 0.059 (7)* | |
C13 | 0.84116 (17) | 0.99531 (11) | 0.0469 (2) | 0.0352 (5) | |
C14 | 0.89664 (17) | 0.91915 (11) | 0.0632 (2) | 0.0359 (5) | |
C15 | 0.9001 (2) | 0.87640 (13) | −0.0711 (3) | 0.0445 (5) | |
C16 | 0.8467 (2) | 0.90831 (15) | −0.2205 (3) | 0.0508 (6) | |
C17 | 0.7883 (2) | 0.98150 (15) | −0.2390 (3) | 0.0498 (6) | |
C18 | 0.7875 (2) | 1.02484 (14) | −0.1056 (3) | 0.0436 (5) | |
C19 | 0.84024 (17) | 1.05009 (12) | 0.1806 (2) | 0.0357 (5) | |
N20 | 0.89328 (16) | 1.02345 (10) | 0.3272 (2) | 0.0408 (5) | |
O21 | 0.79011 (14) | 1.11748 (9) | 0.15592 (17) | 0.0455 (4) | |
O22 | 0.91361 (15) | 1.07628 (9) | 0.45575 (17) | 0.0469 (4) | |
O23 | 0.94344 (13) | 0.88957 (8) | 0.21257 (17) | 0.0421 (4) | |
C24 | 1.0065 (3) | 0.81425 (14) | 0.2352 (4) | 0.0515 (6) | |
H15 | 0.943 (2) | 0.8233 (14) | −0.052 (3) | 0.046 (6)* | |
H16 | 0.850 (3) | 0.8753 (17) | −0.310 (4) | 0.070 (8)* | |
H17 | 0.748 (2) | 1.0040 (15) | −0.347 (3) | 0.057 (7)* | |
H18 | 0.745 (3) | 1.0815 (17) | −0.120 (3) | 0.063 (7)* | |
H20 | 0.944 (3) | 0.9699 (17) | 0.348 (3) | 0.068 (8)* | |
H22 | 0.830 (4) | 1.091 (2) | 0.461 (4) | 0.097 (11)* | |
H24A | 1.079 (3) | 0.8135 (17) | 0.193 (4) | 0.074 (8)* | |
H24B | 1.030 (2) | 0.8052 (13) | 0.343 (3) | 0.041 (6)* | |
H24C | 0.949 (3) | 0.7721 (17) | 0.175 (3) | 0.060 (7)* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
C1 | 0.0280 (10) | 0.0377 (10) | 0.0343 (10) | 0.0022 (7) | 0.0113 (8) | 0.0027 (7) |
C2 | 0.0282 (10) | 0.0376 (11) | 0.0410 (11) | −0.0013 (8) | 0.0093 (8) | 0.0017 (8) |
C3 | 0.0328 (11) | 0.0584 (15) | 0.0537 (13) | −0.0090 (10) | 0.0179 (10) | 0.0042 (10) |
C4 | 0.0336 (12) | 0.0746 (17) | 0.0574 (14) | 0.0047 (11) | 0.0238 (10) | 0.0011 (12) |
C5 | 0.0439 (13) | 0.0559 (14) | 0.0539 (13) | 0.0160 (11) | 0.0232 (10) | 0.0029 (11) |
C6 | 0.0413 (12) | 0.0408 (12) | 0.0435 (11) | 0.0068 (9) | 0.0172 (9) | 0.0057 (9) |
C7 | 0.0318 (10) | 0.0322 (10) | 0.0390 (10) | −0.0019 (8) | 0.0146 (8) | −0.0002 (8) |
N8 | 0.0394 (10) | 0.0354 (10) | 0.0576 (11) | −0.0042 (7) | 0.0300 (8) | −0.0035 (8) |
O9 | 0.0561 (10) | 0.0337 (8) | 0.0740 (11) | −0.0047 (7) | 0.0417 (8) | 0.0004 (7) |
O10 | 0.0488 (9) | 0.0418 (9) | 0.0747 (11) | 0.0029 (7) | 0.0426 (8) | 0.0008 (8) |
O11 | 0.0391 (8) | 0.0324 (8) | 0.0672 (10) | −0.0068 (6) | 0.0231 (7) | 0.0009 (6) |
C12 | 0.0502 (15) | 0.0417 (13) | 0.0657 (17) | −0.0147 (11) | 0.0149 (13) | 0.0035 (11) |
C13 | 0.0257 (9) | 0.0389 (11) | 0.0447 (11) | −0.0057 (8) | 0.0159 (8) | 0.0027 (8) |
C14 | 0.0278 (10) | 0.0403 (11) | 0.0445 (11) | −0.0063 (8) | 0.0182 (8) | −0.0011 (8) |
C15 | 0.0417 (12) | 0.0424 (12) | 0.0554 (13) | −0.0078 (9) | 0.0237 (10) | −0.0070 (10) |
C16 | 0.0522 (14) | 0.0579 (14) | 0.0495 (13) | −0.0169 (11) | 0.0260 (11) | −0.0133 (11) |
C17 | 0.0512 (13) | 0.0550 (14) | 0.0456 (13) | −0.0133 (11) | 0.0179 (10) | 0.0004 (10) |
C18 | 0.0399 (11) | 0.0459 (12) | 0.0473 (12) | −0.0080 (9) | 0.0162 (9) | 0.0026 (9) |
C19 | 0.0258 (9) | 0.0420 (11) | 0.0436 (11) | 0.0020 (8) | 0.0167 (8) | 0.0060 (8) |
N20 | 0.0407 (10) | 0.0425 (10) | 0.0424 (10) | 0.0092 (8) | 0.0173 (8) | −0.0020 (7) |
O21 | 0.0458 (9) | 0.0420 (8) | 0.0516 (9) | 0.0114 (7) | 0.0189 (7) | 0.0065 (6) |
O22 | 0.0486 (9) | 0.0516 (10) | 0.0429 (8) | 0.0186 (7) | 0.0168 (7) | −0.0036 (6) |
O23 | 0.0433 (8) | 0.0378 (8) | 0.0501 (9) | 0.0068 (6) | 0.0212 (7) | 0.0009 (6) |
C24 | 0.0512 (14) | 0.0402 (13) | 0.0672 (17) | 0.0133 (11) | 0.0236 (13) | 0.0007 (11) |
Geometric parameters (Å, º) top
C1—C6 | 1.387 (3) | C13—C18 | 1.394 (3) |
C1—C2 | 1.403 (3) | C13—C14 | 1.408 (3) |
C1—C7 | 1.496 (3) | C13—C19 | 1.497 (3) |
C2—O11 | 1.359 (2) | C14—O23 | 1.362 (2) |
C2—C3 | 1.392 (3) | C14—C15 | 1.393 (3) |
C3—C4 | 1.372 (3) | C15—C16 | 1.386 (3) |
C3—H3 | 0.87 (3) | C15—H15 | 1.00 (2) |
C4—C5 | 1.373 (4) | C16—C17 | 1.377 (4) |
C4—H4 | 0.98 (3) | C16—H16 | 0.97 (3) |
C5—C6 | 1.386 (3) | C17—C18 | 1.384 (3) |
C5—H5 | 0.93 (3) | C17—H17 | 1.00 (3) |
C6—H6 | 1.00 (2) | C18—H18 | 1.05 (3) |
C7—O9 | 1.243 (2) | C19—O21 | 1.251 (2) |
C7—N8 | 1.314 (2) | C19—N20 | 1.333 (3) |
N8—O10 | 1.391 (2) | N20—O22 | 1.404 (2) |
N8—H8 | 0.88 (3) | N20—H20 | 1.05 (3) |
O10—H10 | 0.95 (3) | O22—H22 | 0.98 (4) |
O11—C12 | 1.430 (3) | O23—C24 | 1.431 (3) |
C12—H12A | 0.94 (3) | C24—H24A | 0.99 (3) |
C12—H12B | 0.97 (3) | C24—H24B | 0.92 (2) |
C12—H12C | 0.94 (3) | C24—H24C | 1.00 (3) |
| | | |
C6—C1—C2 | 118.27 (18) | C18—C13—C14 | 118.27 (19) |
C6—C1—C7 | 116.17 (17) | C18—C13—C19 | 116.27 (18) |
C2—C1—C7 | 125.54 (17) | C14—C13—C19 | 125.37 (18) |
O11—C2—C3 | 123.38 (18) | O23—C14—C15 | 122.46 (18) |
O11—C2—C1 | 117.04 (17) | O23—C14—C13 | 117.59 (17) |
C3—C2—C1 | 119.57 (19) | C15—C14—C13 | 119.94 (19) |
C4—C3—C2 | 120.6 (2) | C16—C15—C14 | 119.9 (2) |
C4—C3—H3 | 120.7 (17) | C16—C15—H15 | 123.7 (13) |
C2—C3—H3 | 118.7 (18) | C14—C15—H15 | 116.4 (13) |
C3—C4—C5 | 120.8 (2) | C17—C16—C15 | 121.0 (2) |
C3—C4—H4 | 118.7 (16) | C17—C16—H16 | 122.7 (17) |
C5—C4—H4 | 120.5 (16) | C15—C16—H16 | 116.3 (17) |
C4—C5—C6 | 119.0 (2) | C16—C17—C18 | 119.1 (2) |
C4—C5—H5 | 119.4 (16) | C16—C17—H17 | 120.9 (15) |
C6—C5—H5 | 121.6 (16) | C18—C17—H17 | 119.9 (15) |
C5—C6—C1 | 121.8 (2) | C17—C18—C13 | 121.7 (2) |
C5—C6—H6 | 121.0 (13) | C17—C18—H18 | 118.7 (15) |
C1—C6—H6 | 117.2 (13) | C13—C18—H18 | 119.5 (15) |
O9—C7—N8 | 120.95 (17) | O21—C19—N20 | 121.47 (18) |
O9—C7—C1 | 120.45 (16) | O21—C19—C13 | 121.41 (18) |
N8—C7—C1 | 118.43 (16) | N20—C19—C13 | 117.11 (17) |
C7—N8—O10 | 120.13 (16) | C19—N20—O22 | 119.58 (16) |
C7—N8—H8 | 125.4 (17) | C19—N20—H20 | 121.7 (15) |
O10—N8—H8 | 112.1 (17) | O22—N20—H20 | 116.3 (15) |
N8—O10—H10 | 110.6 (19) | N20—O22—H22 | 106 (2) |
C2—O11—C12 | 119.15 (18) | C14—O23—C24 | 119.46 (17) |
O11—C12—H12A | 108.9 (17) | O23—C24—H24A | 112.5 (17) |
O11—C12—H12B | 107.9 (15) | O23—C24—H24B | 105.6 (14) |
H12A—C12—H12B | 116 (2) | H24A—C24—H24B | 112 (2) |
O11—C12—H12C | 103.3 (17) | O23—C24—H24C | 109.5 (16) |
H12A—C12—H12C | 110 (2) | H24A—C24—H24C | 106 (2) |
H12B—C12—H12C | 110 (2) | H24B—C24—H24C | 112 (2) |
| | | |
C6—C1—C2—O11 | 177.62 (17) | C18—C13—C14—O23 | −177.02 (16) |
C7—C1—C2—O11 | −3.9 (3) | C19—C13—C14—O23 | 6.3 (3) |
C6—C1—C2—C3 | −1.8 (3) | C18—C13—C14—C15 | 1.9 (3) |
C7—C1—C2—C3 | 176.70 (19) | C19—C13—C14—C15 | −174.79 (18) |
O11—C2—C3—C4 | −178.7 (2) | O23—C14—C15—C16 | 177.54 (18) |
C1—C2—C3—C4 | 0.7 (3) | C13—C14—C15—C16 | −1.3 (3) |
C2—C3—C4—C5 | 0.8 (4) | C14—C15—C16—C17 | −1.0 (3) |
C3—C4—C5—C6 | −1.1 (4) | C15—C16—C17—C18 | 2.5 (3) |
C4—C5—C6—C1 | −0.1 (3) | C16—C17—C18—C13 | −1.9 (3) |
C2—C1—C6—C5 | 1.5 (3) | C14—C13—C18—C17 | −0.3 (3) |
C7—C1—C6—C5 | −177.12 (19) | C19—C13—C18—C17 | 176.69 (18) |
C6—C1—C7—O9 | −1.3 (3) | C18—C13—C19—O21 | 2.4 (3) |
C2—C1—C7—O9 | −179.82 (19) | C14—C13—C19—O21 | 179.06 (17) |
C6—C1—C7—N8 | 174.04 (18) | C18—C13—C19—N20 | −178.73 (17) |
C2—C1—C7—N8 | −4.5 (3) | C14—C13—C19—N20 | −2.0 (3) |
O9—C7—N8—O10 | −5.1 (3) | O21—C19—N20—O22 | −11.4 (3) |
C1—C7—N8—O10 | 179.56 (17) | C13—C19—N20—O22 | 169.65 (16) |
C3—C2—O11—C12 | −0.5 (3) | C15—C14—O23—C24 | 4.4 (3) |
C1—C2—O11—C12 | −179.91 (19) | C13—C14—O23—C24 | −176.75 (18) |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N8—H8···O11 | 0.88 (3) | 2.00 (3) | 2.609 (2) | 125 (2) |
N8—H8···O21i | 0.88 (3) | 2.41 (3) | 3.102 (2) | 135 (2) |
O10—H10···O21ii | 0.95 (3) | 1.88 (3) | 2.798 (2) | 162 (3) |
N20—H20···O22iii | 1.05 (3) | 2.12 (3) | 2.951 (2) | 134 (2) |
N20—H20···O23 | 1.05 (3) | 1.80 (3) | 2.588 (2) | 129 (2) |
O22—H22···O9iv | 0.98 (4) | 1.68 (4) | 2.659 (2) | 172 (3) |
C17—H17···O9v | 1.00 (3) | 2.32 (3) | 3.251 (3) | 155 (2) |
C24—H24A···O10vi | 0.99 (3) | 2.27 (3) | 3.123 (3) | 145 (2) |
Symmetry codes: (i) −x+1, −y+2, −z; (ii) −x+1, y−1/2, −z+1/2; (iii) −x+2, −y+2, −z+1; (iv) −x+1, y+1/2, −z+1/2; (v) −x+1, y+1/2, −z−1/2; (vi) x+1, y, z. |