organic compounds
2-[4-Acetyl-5-(biphenyl-4-yl)-4,5-dihydro-1,3,4-oxadiazol-2-yl]phenyl acetate
aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: seikweng@um.edu.my
In the title molecule, C24H20N2O4, the five-membered oxadiazole ring is nearly planar (r.m.s. deviation = 0.053 Å) and the phenyl ring of the biphenyl unit attached to it forms a dihedral angle of 73.2 (1)°; the other phenyl ring is close to coplanar with the oxadiazole ring [dihedral angle = 6.2 (2)°].
Related literature
For the crystal structures of other 2,3-dihydro-1,3,4-oxadiazoles, see: Jin et al. (2006); Somogyi et al. (1992); Song et al. (2006); He & Zhu (2008).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536810009621/pv2264sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810009621/pv2264Isup2.hkl
The Schiff base, N'-(4-phenylbenzylidene)-2-hydroxybenzohydrazide, was synthesized by condensing 4-phenylbenzaldehyde with 2-hydrobenzhydrazide. The compound (0.5 g, 1.58 mmol) was heated in acetic anhydride (5 ml) for 2 h. The solution was cooled and then poured into crushed ice. The solid that separated solid was collected and recrystallized from methanol to give the title compound as well-formed prisms.
The H-atoms were placed in calculated positions (C—H 0.93–98 Å) and were included in the
in the riding model approximation, with Uiso(H) set to 1.2–1.5Ueq(C). Due to insufficient effects, an could not be established. Therefore, 1495 Friedel pairs were merged.Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. Thermal ellipsoid plot (Barbour, 2001) of the title compound; ellipsoids are drawn at the 50% probability level and H atoms are of arbitrary radiuii. |
C24H20N2O4 | F(000) = 840 |
Mr = 400.42 | Dx = 1.326 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 2292 reflections |
a = 8.6750 (11) Å | θ = 2.6–19.9° |
b = 12.0279 (14) Å | µ = 0.09 mm−1 |
c = 19.221 (2) Å | T = 293 K |
V = 2005.6 (4) Å3 | Prism, colorless |
Z = 4 | 0.30 × 0.20 × 0.10 mm |
Bruker SMART APEX diffractometer | 1534 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.056 |
Graphite monochromator | θmax = 25.0°, θmin = 2.0° |
ω scans | h = −10→10 |
16090 measured reflections | k = −14→14 |
2029 independent reflections | l = −22→22 |
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)] = 0.035 | H-atom parameters constrained |
wR(F2) = 0.100 | w = 1/[σ2(Fo2) + (0.0598P)2 + 0.076P] where P = (Fo2 + 2Fc2)/3 |
S = 1.00 | (Δ/σ)max = 0.001 |
2029 reflections | Δρmax = 0.11 e Å−3 |
274 parameters | Δρmin = −0.13 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0082 (18) |
C24H20N2O4 | V = 2005.6 (4) Å3 |
Mr = 400.42 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 8.6750 (11) Å | µ = 0.09 mm−1 |
b = 12.0279 (14) Å | T = 293 K |
c = 19.221 (2) Å | 0.30 × 0.20 × 0.10 mm |
Bruker SMART APEX diffractometer | 1534 reflections with I > 2σ(I) |
16090 measured reflections | Rint = 0.056 |
2029 independent reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.100 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.11 e Å−3 |
2029 reflections | Δρmin = −0.13 e Å−3 |
274 parameters |
x | y | z | Uiso*/Ueq | ||
O1 | −0.0208 (3) | 1.13163 (16) | 0.16056 (10) | 0.0571 (6) | |
O2 | −0.1684 (3) | 1.0247 (2) | 0.22783 (14) | 0.0894 (9) | |
O3 | 0.3885 (2) | 0.96800 (17) | 0.22120 (10) | 0.0540 (5) | |
O4 | 0.4949 (3) | 1.19201 (19) | 0.37185 (12) | 0.0706 (7) | |
N1 | 0.2135 (3) | 1.09315 (19) | 0.25521 (13) | 0.0513 (6) | |
N2 | 0.3385 (3) | 1.09851 (19) | 0.30133 (13) | 0.0537 (7) | |
C1 | −0.1667 (5) | 1.2206 (3) | 0.2462 (2) | 0.0806 (11) | |
H1A | −0.2221 | 1.2060 | 0.2884 | 0.121* | |
H1B | −0.2307 | 1.2627 | 0.2151 | 0.121* | |
H1C | −0.0751 | 1.2622 | 0.2566 | 0.121* | |
C2 | −0.1239 (4) | 1.1146 (3) | 0.21312 (17) | 0.0589 (8) | |
C3 | 0.0343 (4) | 1.0375 (2) | 0.12550 (15) | 0.0488 (7) | |
C4 | −0.0388 (4) | 1.0074 (3) | 0.06492 (16) | 0.0618 (9) | |
H4 | −0.1250 | 1.0465 | 0.0497 | 0.074* | |
C5 | 0.0166 (5) | 0.9191 (3) | 0.02688 (17) | 0.0693 (10) | |
H5 | −0.0325 | 0.8978 | −0.0140 | 0.083* | |
C6 | 0.1450 (4) | 0.8622 (3) | 0.04945 (17) | 0.0631 (9) | |
H6 | 0.1821 | 0.8024 | 0.0238 | 0.076* | |
C7 | 0.2189 (4) | 0.8933 (2) | 0.10977 (15) | 0.0534 (8) | |
H7 | 0.3055 | 0.8541 | 0.1244 | 0.064* | |
C8 | 0.1655 (3) | 0.9829 (2) | 0.14935 (14) | 0.0442 (7) | |
C9 | 0.2499 (3) | 1.0175 (2) | 0.21116 (15) | 0.0451 (7) | |
C10 | 0.3703 (4) | 1.1884 (2) | 0.34137 (16) | 0.0550 (8) | |
C11 | 0.2494 (5) | 1.2753 (3) | 0.34728 (19) | 0.0733 (10) | |
H11A | 0.2971 | 1.3461 | 0.3556 | 0.110* | |
H11B | 0.1818 | 1.2576 | 0.3852 | 0.110* | |
H11C | 0.1913 | 1.2784 | 0.3048 | 0.110* | |
C12 | 0.4469 (4) | 1.0077 (2) | 0.28773 (15) | 0.0518 (7) | |
H12 | 0.5521 | 1.0363 | 0.2827 | 0.062* | |
C13 | 0.4419 (3) | 0.9151 (2) | 0.34025 (15) | 0.0443 (7) | |
C14 | 0.3338 (4) | 0.9088 (3) | 0.39249 (16) | 0.0534 (8) | |
H14 | 0.2617 | 0.9654 | 0.3975 | 0.064* | |
C15 | 0.3307 (4) | 0.8198 (3) | 0.43733 (16) | 0.0562 (8) | |
H15 | 0.2570 | 0.8177 | 0.4724 | 0.067* | |
C16 | 0.4350 (3) | 0.7333 (2) | 0.43137 (15) | 0.0463 (7) | |
C17 | 0.5437 (4) | 0.7399 (3) | 0.37835 (17) | 0.0568 (8) | |
H17 | 0.6146 | 0.6826 | 0.3728 | 0.068* | |
C18 | 0.5483 (4) | 0.8292 (2) | 0.33416 (16) | 0.0557 (8) | |
H18 | 0.6234 | 0.8325 | 0.2997 | 0.067* | |
C19 | 0.4308 (3) | 0.6360 (2) | 0.47964 (15) | 0.0486 (7) | |
C20 | 0.4008 (4) | 0.6501 (3) | 0.54999 (17) | 0.0651 (9) | |
H20 | 0.3819 | 0.7210 | 0.5673 | 0.078* | |
C21 | 0.3985 (5) | 0.5602 (3) | 0.5946 (2) | 0.0803 (12) | |
H21 | 0.3795 | 0.5708 | 0.6418 | 0.096* | |
C22 | 0.4242 (5) | 0.4550 (3) | 0.5693 (2) | 0.0804 (12) | |
H22 | 0.4192 | 0.3942 | 0.5991 | 0.096* | |
C23 | 0.4573 (5) | 0.4395 (3) | 0.5002 (2) | 0.0758 (11) | |
H23 | 0.4778 | 0.3685 | 0.4834 | 0.091* | |
C24 | 0.4601 (4) | 0.5292 (3) | 0.45577 (18) | 0.0610 (8) | |
H24 | 0.4819 | 0.5181 | 0.4089 | 0.073* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0657 (14) | 0.0503 (12) | 0.0552 (12) | 0.0078 (10) | 0.0035 (11) | 0.0030 (10) |
O2 | 0.103 (2) | 0.0775 (17) | 0.0877 (18) | −0.0177 (17) | 0.0411 (16) | −0.0123 (16) |
O3 | 0.0576 (13) | 0.0552 (12) | 0.0492 (11) | 0.0090 (10) | 0.0011 (10) | −0.0022 (10) |
O4 | 0.0828 (18) | 0.0671 (15) | 0.0619 (14) | −0.0174 (13) | −0.0126 (14) | −0.0039 (12) |
N1 | 0.0569 (16) | 0.0432 (14) | 0.0538 (15) | −0.0015 (12) | −0.0060 (13) | −0.0069 (13) |
N2 | 0.0579 (16) | 0.0417 (13) | 0.0614 (15) | 0.0022 (12) | −0.0096 (14) | −0.0074 (13) |
C1 | 0.080 (3) | 0.080 (3) | 0.082 (3) | 0.029 (2) | −0.003 (2) | −0.010 (2) |
C2 | 0.0554 (19) | 0.067 (2) | 0.0539 (19) | 0.0090 (17) | 0.0042 (17) | −0.0071 (18) |
C3 | 0.0570 (18) | 0.0457 (16) | 0.0438 (16) | −0.0027 (15) | 0.0071 (15) | 0.0039 (14) |
C4 | 0.0587 (19) | 0.077 (2) | 0.0496 (19) | −0.0057 (19) | 0.0016 (17) | 0.0002 (17) |
C5 | 0.072 (2) | 0.088 (3) | 0.0487 (19) | −0.020 (2) | 0.0041 (18) | −0.0086 (19) |
C6 | 0.074 (2) | 0.061 (2) | 0.055 (2) | −0.0131 (19) | 0.0136 (19) | −0.0187 (17) |
C7 | 0.0576 (19) | 0.0507 (18) | 0.0518 (18) | −0.0051 (16) | 0.0093 (16) | −0.0033 (15) |
C8 | 0.0528 (16) | 0.0371 (14) | 0.0429 (16) | −0.0075 (13) | 0.0058 (14) | 0.0042 (13) |
C9 | 0.0511 (16) | 0.0368 (15) | 0.0474 (17) | 0.0009 (13) | 0.0030 (14) | 0.0021 (14) |
C10 | 0.077 (2) | 0.0436 (17) | 0.0445 (17) | −0.0122 (17) | −0.0019 (18) | 0.0036 (14) |
C11 | 0.101 (3) | 0.0514 (19) | 0.067 (2) | 0.003 (2) | 0.000 (2) | −0.0150 (18) |
C12 | 0.0507 (16) | 0.0515 (18) | 0.0532 (18) | −0.0041 (15) | −0.0030 (15) | −0.0049 (15) |
C13 | 0.0403 (15) | 0.0447 (15) | 0.0480 (16) | −0.0029 (13) | −0.0015 (14) | −0.0043 (14) |
C14 | 0.0498 (18) | 0.0476 (18) | 0.063 (2) | 0.0096 (15) | 0.0021 (16) | 0.0006 (16) |
C15 | 0.0501 (17) | 0.0585 (19) | 0.0600 (19) | 0.0033 (16) | 0.0147 (16) | 0.0026 (17) |
C16 | 0.0420 (16) | 0.0461 (16) | 0.0507 (17) | −0.0021 (14) | 0.0002 (15) | −0.0069 (14) |
C17 | 0.0542 (18) | 0.0513 (18) | 0.0651 (19) | 0.0118 (16) | 0.0066 (17) | −0.0032 (16) |
C18 | 0.0538 (18) | 0.0588 (18) | 0.0546 (18) | 0.0054 (16) | 0.0115 (16) | 0.0020 (16) |
C19 | 0.0398 (16) | 0.0527 (18) | 0.0534 (18) | 0.0000 (14) | −0.0006 (14) | −0.0025 (15) |
C20 | 0.074 (2) | 0.061 (2) | 0.059 (2) | 0.0033 (18) | 0.0058 (19) | −0.0022 (18) |
C21 | 0.092 (3) | 0.087 (3) | 0.062 (2) | 0.006 (2) | 0.008 (2) | 0.012 (2) |
C22 | 0.081 (3) | 0.076 (3) | 0.085 (3) | 0.007 (2) | 0.012 (2) | 0.030 (2) |
C23 | 0.076 (2) | 0.057 (2) | 0.094 (3) | 0.0040 (19) | 0.012 (2) | 0.012 (2) |
C24 | 0.062 (2) | 0.0540 (19) | 0.067 (2) | 0.0000 (18) | 0.0093 (18) | −0.0013 (17) |
O1—C2 | 1.365 (4) | C11—H11B | 0.9600 |
O1—C3 | 1.401 (3) | C11—H11C | 0.9600 |
O2—C2 | 1.183 (4) | C12—C13 | 1.503 (4) |
O3—C9 | 1.356 (4) | C12—H12 | 0.9800 |
O3—C12 | 1.456 (3) | C13—C14 | 1.376 (4) |
O4—C10 | 1.230 (4) | C13—C18 | 1.390 (4) |
N1—C9 | 1.283 (3) | C14—C15 | 1.374 (4) |
N1—N2 | 1.402 (3) | C14—H14 | 0.9300 |
N2—C10 | 1.355 (4) | C15—C16 | 1.384 (4) |
N2—C12 | 1.465 (4) | C15—H15 | 0.9300 |
C1—C2 | 1.472 (4) | C16—C17 | 1.391 (4) |
C1—H1A | 0.9600 | C16—C19 | 1.494 (4) |
C1—H1B | 0.9600 | C17—C18 | 1.370 (4) |
C1—H1C | 0.9600 | C17—H17 | 0.9300 |
C3—C4 | 1.374 (4) | C18—H18 | 0.9300 |
C3—C8 | 1.392 (4) | C19—C20 | 1.387 (4) |
C4—C5 | 1.377 (5) | C19—C24 | 1.387 (4) |
C4—H4 | 0.9300 | C20—C21 | 1.381 (5) |
C5—C6 | 1.377 (5) | C20—H20 | 0.9300 |
C5—H5 | 0.9300 | C21—C22 | 1.374 (5) |
C6—C7 | 1.376 (4) | C21—H21 | 0.9300 |
C6—H6 | 0.9300 | C22—C23 | 1.371 (5) |
C7—C8 | 1.398 (4) | C22—H22 | 0.9300 |
C7—H7 | 0.9300 | C23—C24 | 1.377 (5) |
C8—C9 | 1.456 (4) | C23—H23 | 0.9300 |
C10—C11 | 1.485 (5) | C24—H24 | 0.9300 |
C11—H11A | 0.9600 | ||
C2—O1—C3 | 117.3 (2) | H11B—C11—H11C | 109.5 |
C9—O3—C12 | 106.9 (2) | O3—C12—N2 | 100.2 (2) |
C9—N1—N2 | 105.1 (2) | O3—C12—C13 | 109.7 (2) |
C10—N2—N1 | 123.6 (3) | N2—C12—C13 | 114.4 (2) |
C10—N2—C12 | 124.4 (3) | O3—C12—H12 | 110.7 |
N1—N2—C12 | 110.4 (2) | N2—C12—H12 | 110.7 |
C2—C1—H1A | 109.5 | C13—C12—H12 | 110.7 |
C2—C1—H1B | 109.5 | C14—C13—C18 | 118.2 (3) |
H1A—C1—H1B | 109.5 | C14—C13—C12 | 123.4 (3) |
C2—C1—H1C | 109.5 | C18—C13—C12 | 118.3 (3) |
H1A—C1—H1C | 109.5 | C15—C14—C13 | 120.9 (3) |
H1B—C1—H1C | 109.5 | C15—C14—H14 | 119.5 |
O2—C2—O1 | 121.9 (3) | C13—C14—H14 | 119.5 |
O2—C2—C1 | 127.3 (3) | C14—C15—C16 | 121.4 (3) |
O1—C2—C1 | 110.8 (3) | C14—C15—H15 | 119.3 |
C4—C3—C8 | 122.1 (3) | C16—C15—H15 | 119.3 |
C4—C3—O1 | 117.6 (3) | C15—C16—C17 | 117.4 (3) |
C8—C3—O1 | 120.1 (3) | C15—C16—C19 | 121.5 (3) |
C3—C4—C5 | 119.5 (3) | C17—C16—C19 | 121.1 (3) |
C3—C4—H4 | 120.3 | C18—C17—C16 | 121.3 (3) |
C5—C4—H4 | 120.3 | C18—C17—H17 | 119.4 |
C4—C5—C6 | 119.9 (3) | C16—C17—H17 | 119.4 |
C4—C5—H5 | 120.1 | C17—C18—C13 | 120.7 (3) |
C6—C5—H5 | 120.1 | C17—C18—H18 | 119.6 |
C7—C6—C5 | 120.5 (3) | C13—C18—H18 | 119.6 |
C7—C6—H6 | 119.8 | C20—C19—C24 | 118.0 (3) |
C5—C6—H6 | 119.8 | C20—C19—C16 | 120.9 (3) |
C6—C7—C8 | 120.9 (3) | C24—C19—C16 | 121.0 (3) |
C6—C7—H7 | 119.6 | C21—C20—C19 | 120.8 (3) |
C8—C7—H7 | 119.6 | C21—C20—H20 | 119.6 |
C3—C8—C7 | 117.1 (3) | C19—C20—H20 | 119.6 |
C3—C8—C9 | 123.0 (3) | C22—C21—C20 | 119.9 (3) |
C7—C8—C9 | 119.9 (3) | C22—C21—H21 | 120.1 |
N1—C9—O3 | 115.8 (3) | C20—C21—H21 | 120.1 |
N1—C9—C8 | 128.2 (3) | C23—C22—C21 | 120.2 (3) |
O3—C9—C8 | 115.9 (2) | C23—C22—H22 | 119.9 |
O4—C10—N2 | 118.5 (3) | C21—C22—H22 | 119.9 |
O4—C10—C11 | 124.0 (3) | C22—C23—C24 | 119.8 (3) |
N2—C10—C11 | 117.5 (3) | C22—C23—H23 | 120.1 |
C10—C11—H11A | 109.5 | C24—C23—H23 | 120.1 |
C10—C11—H11B | 109.5 | C23—C24—C19 | 121.1 (3) |
H11A—C11—H11B | 109.5 | C23—C24—H24 | 119.4 |
C10—C11—H11C | 109.5 | C19—C24—H24 | 119.4 |
H11A—C11—H11C | 109.5 | ||
C9—N1—N2—C10 | 158.3 (3) | C10—N2—C12—O3 | −154.2 (3) |
C9—N1—N2—C12 | −8.2 (3) | N1—N2—C12—O3 | 12.1 (3) |
C3—O1—C2—O2 | −1.7 (4) | C10—N2—C12—C13 | 88.5 (3) |
C3—O1—C2—C1 | 178.1 (3) | N1—N2—C12—C13 | −105.2 (3) |
C2—O1—C3—C4 | 95.3 (3) | O3—C12—C13—C14 | −104.7 (3) |
C2—O1—C3—C8 | −89.4 (3) | N2—C12—C13—C14 | 7.0 (4) |
C8—C3—C4—C5 | 1.4 (5) | O3—C12—C13—C18 | 72.7 (3) |
O1—C3—C4—C5 | 176.6 (3) | N2—C12—C13—C18 | −175.6 (3) |
C3—C4—C5—C6 | −0.5 (5) | C18—C13—C14—C15 | −0.1 (4) |
C4—C5—C6—C7 | −0.2 (5) | C12—C13—C14—C15 | 177.3 (3) |
C5—C6—C7—C8 | 0.0 (5) | C13—C14—C15—C16 | −0.5 (5) |
C4—C3—C8—C7 | −1.6 (4) | C14—C15—C16—C17 | 0.3 (4) |
O1—C3—C8—C7 | −176.6 (2) | C14—C15—C16—C19 | −179.4 (3) |
C4—C3—C8—C9 | 176.3 (3) | C15—C16—C17—C18 | 0.6 (4) |
O1—C3—C8—C9 | 1.3 (4) | C19—C16—C17—C18 | −179.7 (3) |
C6—C7—C8—C3 | 0.9 (4) | C16—C17—C18—C13 | −1.3 (5) |
C6—C7—C8—C9 | −177.1 (3) | C14—C13—C18—C17 | 1.0 (4) |
N2—N1—C9—O3 | 0.1 (3) | C12—C13—C18—C17 | −176.5 (3) |
N2—N1—C9—C8 | −175.7 (3) | C15—C16—C19—C20 | −39.6 (4) |
C12—O3—C9—N1 | 7.9 (3) | C17—C16—C19—C20 | 140.8 (3) |
C12—O3—C9—C8 | −175.8 (2) | C15—C16—C19—C24 | 141.8 (3) |
C3—C8—C9—N1 | 6.3 (4) | C17—C16—C19—C24 | −37.8 (4) |
C7—C8—C9—N1 | −175.9 (3) | C24—C19—C20—C21 | −0.7 (5) |
C3—C8—C9—O3 | −169.5 (2) | C16—C19—C20—C21 | −179.3 (3) |
C7—C8—C9—O3 | 8.3 (4) | C19—C20—C21—C22 | −0.8 (6) |
N1—N2—C10—O4 | −168.8 (3) | C20—C21—C22—C23 | 2.2 (7) |
C12—N2—C10—O4 | −4.3 (4) | C21—C22—C23—C24 | −2.0 (6) |
N1—N2—C10—C11 | 12.9 (4) | C22—C23—C24—C19 | 0.4 (6) |
C12—N2—C10—C11 | 177.4 (3) | C20—C19—C24—C23 | 0.9 (5) |
C9—O3—C12—N2 | −11.5 (3) | C16—C19—C24—C23 | 179.6 (3) |
C9—O3—C12—C13 | 109.3 (3) |
Experimental details
Crystal data | |
Chemical formula | C24H20N2O4 |
Mr | 400.42 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 293 |
a, b, c (Å) | 8.6750 (11), 12.0279 (14), 19.221 (2) |
V (Å3) | 2005.6 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.30 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Bruker SMART APEX diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16090, 2029, 1534 |
Rint | 0.056 |
(sin θ/λ)max (Å−1) | 0.594 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.100, 1.00 |
No. of reflections | 2029 |
No. of parameters | 274 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.11, −0.13 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2010).
Acknowledgements
We thank the University of Malaya for supporting this study.
References
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The Schiff base reactant, N'-(4-phenylbenzylidene)-2-hydroxybenzohydrazide, features an –C(=O)–NH–N=CH linkage betwen the two aromatic systems that can be induced to form an oxadiazole. In this study, the oxadiazole is indeed formed when cyclized in acetic anhyride. The nitrogen atom in the 3-position of the ring has also been acetylated; interestingly, the hydroxy group also undergoes acetylation to yield a bis-acetylated product, the title compound. The crystal structure of the title compound is reported in this article (Fig. 1).