organic compounds
4-[(E)-3-Methoxy-5-nitro-4-(4-nitrobenzyloxy)benzylideneamino]-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one
aSchool of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang City, Sichuan Province 621010, People's Republic of China
*Correspondence e-mail: liao_lei99@163.com
In the title compound, C26H23N5O7, the central benzene ring makes dihedral angles of 35.08 (6), 48.75 (7) and 69.55 (8)° with the pyrazolone ring, the nitrobenzene ring and the terminal phenyl ring, respectively. An intramolecular C—H⋯O interaction generates an S(6) ring. The packing is stabilized by weak nonclassical intermolecular C—H⋯O=C hydrogen bonds that link adjacent molecules into chains.
Related literature
For general background to related compounds, see: Chen & Yu (2006); Li et al. (2005); Santos et al. (2001); Zhang et al. (2006). For reference bond lengths, see: Allen et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1999); cell SAINT (Bruker, 1999); 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.
Supporting information
https://doi.org/10.1107/S1600536810039152/hb5658sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810039152/hb5658Isup2.hkl
An anhydrous ethanol solution (100 ml) of 3-methoxy-5-nitro-4-(4-nitrobenzyloxy)benzaldehyde (3.32 g, 10 mmol) was added to an anhydrous ethanol solution (50 ml) of 4-amino-1,5-dimethyl-2-phenylpyrazol-3-one (2.03 g, 10 mmol) and the mixture stirred at 350 K for 3 h under N2, giving a yellow precipitate. The product was isolated, recrystallized from acetonitrile, and then dried in a vacuum to give pure compound (I) in 79% yield. Yellow blocks of (I) were obtained by slow evaporation of an acetonitrile solution.
The H atoms were included in calculated positions and refined using a riding model approximation. Constrained C—H bond lengths and isotropic U parameters: 0.93 Å and Uiso(H) = 1.2Ueq(C) for Csp2—H; 0.97 Å and Uiso(H) = 1.2Ueq(C) for methylene C—H; 0.96 Å and Uiso(H) = 1.5Ueq(C) for methyl C—H.
Schiff bases have extensively been studied because of their significant biological activity such as protein and enzyme mimics (Santos et al., 2001). Consequently, many Schiff base derivatives have been synthesized and employed to develop protein and enzyme mimics such as models to mimic hydrolase in the hydrolysis of p-nitrophenyl picolinate (Li et al., 2005).
Among the large number of compounds, 4-amino-1,5-dimethyl-2-phenylpyrazol-3-one forms a variety of
with and the synthesis and crystal structures of some of them, such as (E)-4-(4-(4-chlorobenzyloxy)-3-ethoxybenzylideneamino) -1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one (Zhang et al., 2006) and (E)-2-(2-((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-ylimino) methyl)phenoxy)ethyl 4-methylbenzenesulfonate(Chen & Yu, 2006) have been reported.Structural information is useful when investigating the coordination properties of
functioning as ligands. We report here the synthesis and molecular structure of the title Schiff base compound, (I), (Fig. 1)In the title molecule (Fig. 1), bond lengths and angles are within normal ranges (Allen et al., 1987). The pyrazolone ring (C16—C18/N3—N5/O7) is nearly planar, with an r.m.s. deviation for fitted atoms of 0.0379 Å. It makes a dihedral angle of 44.37 (9)° with the attached phenyl ring (C21—C26). The central benzene ring (C8—C13/C15/O3/O4) is almost planar, with an r.m.s. deviation for fitted atoms of 0.0342 Å. This group makes dihedral angles of 35.08 (6)°, 48.75 (7)° and 69.55 (8)°, respectively, with the the pyrazolone ring (C16—C18/N3—N5/O7), the nitrobenzene ring (C1—C6) and the terminal phenyl ring (C21—C26).
An intramolecular C15—H15···O7═C17 hydrogen bond is found in (I) (Table 1), which helps to stabilize the conformation of the molecule. Packing is stabilized by weak, non-classical intermolecular C4—H4···O7═C117 hydrogen bonds that link adjacent molecules into one-dimensional chains (Table 1, Fig. 2).
For general background to related compounds, see: Chen & Yu (2006); Li et al. (2005); Santos et al. (2001); Zhang et al. (2006). For reference bond lengths, see: Allen et al. (1987).
Data collection: SMART (Bruker, 1999); cell
SAINT (Bruker, 1999); data reduction: SAINT (Bruker, 1999); 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).Fig. 1. The structure of (I), with displacement ellipsoids for non-H atoms drawn at the 50% probability level. | |
Fig. 2. A packing diagram for (I), with hydrogen bonds drawn as dashed lines. |
C26H23N5O7 | F(000) = 2160 |
Mr = 517.49 | Dx = 1.392 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 3086 reflections |
a = 25.671 (11) Å | θ = 2.5–23.1° |
b = 11.933 (5) Å | µ = 0.10 mm−1 |
c = 16.617 (7) Å | T = 294 K |
β = 103.972 (7)° | Block, yellow |
V = 4940 (4) Å3 | 0.20 × 0.18 × 0.10 mm |
Z = 8 |
Bruker SMART APEX CCD diffractometer | 4363 independent reflections |
Radiation source: fine-focus sealed tube | 2652 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.039 |
φ and ω scans | θmax = 25.0°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −30→30 |
Tmin = 0.938, Tmax = 0.989 | k = −10→14 |
12593 measured reflections | l = −18→19 |
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)] = 0.048 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.139 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0693P)2 + 1.2662P] where P = (Fo2 + 2Fc2)/3 |
4363 reflections | (Δ/σ)max = 0.001 |
346 parameters | Δρmax = 0.39 e Å−3 |
0 restraints | Δρmin = −0.21 e Å−3 |
C26H23N5O7 | V = 4940 (4) Å3 |
Mr = 517.49 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 25.671 (11) Å | µ = 0.10 mm−1 |
b = 11.933 (5) Å | T = 294 K |
c = 16.617 (7) Å | 0.20 × 0.18 × 0.10 mm |
β = 103.972 (7)° |
Bruker SMART APEX CCD diffractometer | 4363 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2652 reflections with I > 2σ(I) |
Tmin = 0.938, Tmax = 0.989 | Rint = 0.039 |
12593 measured reflections |
R[F2 > 2σ(F2)] = 0.048 | 0 restraints |
wR(F2) = 0.139 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.39 e Å−3 |
4363 reflections | Δρmin = −0.21 e Å−3 |
346 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 > 2σ(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 | ||
N1 | 0.17786 (9) | −0.1619 (2) | −0.12948 (15) | 0.0577 (6) | |
N2 | 0.45460 (10) | 0.1575 (2) | 0.1025 (2) | 0.0746 (8) | |
N3 | 0.65269 (7) | 0.10798 (16) | 0.27094 (12) | 0.0441 (5) | |
N4 | 0.79727 (7) | 0.09102 (16) | 0.33957 (12) | 0.0442 (5) | |
N5 | 0.78530 (8) | 0.18315 (16) | 0.38510 (13) | 0.0456 (5) | |
O1 | 0.14745 (8) | −0.0959 (2) | −0.10853 (15) | 0.0924 (8) | |
O2 | 0.16274 (8) | −0.23197 (19) | −0.18340 (15) | 0.0838 (7) | |
O3 | 0.41585 (6) | −0.06411 (14) | 0.08900 (11) | 0.0522 (5) | |
O4 | 0.48334 (7) | −0.23900 (15) | 0.14053 (13) | 0.0675 (6) | |
O5 | 0.45720 (10) | 0.2406 (2) | 0.1478 (2) | 0.1103 (9) | |
O6 | 0.42595 (15) | 0.1535 (3) | 0.0360 (2) | 0.1733 (17) | |
O7 | 0.74844 (6) | −0.04709 (15) | 0.25573 (11) | 0.0559 (5) | |
C1 | 0.30688 (10) | −0.06890 (19) | 0.00891 (16) | 0.0471 (6) | |
H1 | 0.3190 | −0.0199 | 0.0530 | 0.057* | |
C2 | 0.25251 (10) | −0.0791 (2) | −0.02563 (16) | 0.0471 (6) | |
H2 | 0.2279 | −0.0369 | −0.0056 | 0.057* | |
C3 | 0.23550 (9) | −0.15309 (19) | −0.09037 (15) | 0.0402 (6) | |
C4 | 0.27074 (10) | −0.2174 (2) | −0.12056 (16) | 0.0479 (6) | |
H4 | 0.2584 | −0.2679 | −0.1636 | 0.057* | |
C5 | 0.32471 (10) | −0.2054 (2) | −0.08570 (16) | 0.0524 (7) | |
H5 | 0.3491 | −0.2483 | −0.1058 | 0.063* | |
C6 | 0.34367 (9) | −0.1309 (2) | −0.02133 (15) | 0.0442 (6) | |
C7 | 0.40340 (11) | −0.1185 (3) | 0.01048 (19) | 0.0792 (10) | |
H7A | 0.4201 | −0.1919 | 0.0156 | 0.095* | |
H7B | 0.4176 | −0.0752 | −0.0287 | 0.095* | |
C8 | 0.46952 (9) | −0.0463 (2) | 0.12145 (15) | 0.0445 (6) | |
C9 | 0.50518 (9) | −0.1341 (2) | 0.14976 (16) | 0.0454 (6) | |
C10 | 0.55822 (9) | −0.1122 (2) | 0.18748 (16) | 0.0462 (6) | |
H10 | 0.5818 | −0.1716 | 0.2042 | 0.055* | |
C11 | 0.57716 (9) | −0.0028 (2) | 0.20097 (15) | 0.0411 (6) | |
C12 | 0.54226 (9) | 0.0855 (2) | 0.17466 (15) | 0.0455 (6) | |
H12 | 0.5539 | 0.1593 | 0.1839 | 0.055* | |
C13 | 0.48995 (9) | 0.0621 (2) | 0.13456 (16) | 0.0459 (6) | |
C14 | 0.51973 (13) | −0.3321 (2) | 0.1583 (2) | 0.0860 (11) | |
H14A | 0.5425 | −0.3321 | 0.1202 | 0.129* | |
H14B | 0.4997 | −0.4007 | 0.1528 | 0.129* | |
H14C | 0.5414 | −0.3256 | 0.2140 | 0.129* | |
C15 | 0.63347 (9) | 0.0136 (2) | 0.24335 (16) | 0.0452 (6) | |
H15 | 0.6563 | −0.0480 | 0.2505 | 0.054* | |
C16 | 0.70778 (9) | 0.11570 (18) | 0.30688 (14) | 0.0391 (6) | |
C17 | 0.74983 (9) | 0.0415 (2) | 0.29486 (15) | 0.0418 (6) | |
C18 | 0.73083 (9) | 0.20013 (19) | 0.35782 (15) | 0.0414 (6) | |
C19 | 0.70450 (11) | 0.3001 (2) | 0.38397 (17) | 0.0575 (7) | |
H19A | 0.7146 | 0.3658 | 0.3580 | 0.086* | |
H19B | 0.7157 | 0.3080 | 0.4431 | 0.086* | |
H19C | 0.6662 | 0.2910 | 0.3677 | 0.086* | |
C20 | 0.82277 (11) | 0.2781 (2) | 0.39304 (18) | 0.0595 (7) | |
H20A | 0.8205 | 0.3102 | 0.3394 | 0.089* | |
H20B | 0.8587 | 0.2522 | 0.4160 | 0.089* | |
H20C | 0.8135 | 0.3337 | 0.4290 | 0.089* | |
C21 | 0.84699 (9) | 0.03300 (19) | 0.36710 (16) | 0.0447 (6) | |
C22 | 0.87379 (10) | 0.0311 (2) | 0.45004 (18) | 0.0596 (7) | |
H22 | 0.8601 | 0.0695 | 0.4891 | 0.072* | |
C23 | 0.92118 (12) | −0.0284 (3) | 0.4743 (2) | 0.0748 (10) | |
H23 | 0.9394 | −0.0296 | 0.5299 | 0.090* | |
C24 | 0.94167 (12) | −0.0855 (3) | 0.4174 (3) | 0.0758 (10) | |
H24 | 0.9734 | −0.1258 | 0.4346 | 0.091* | |
C25 | 0.91524 (11) | −0.0832 (2) | 0.3348 (2) | 0.0677 (9) | |
H25 | 0.9292 | −0.1219 | 0.2962 | 0.081* | |
C26 | 0.86791 (10) | −0.0234 (2) | 0.30924 (19) | 0.0549 (7) | |
H26 | 0.8502 | −0.0212 | 0.2534 | 0.066* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0418 (14) | 0.0746 (16) | 0.0518 (15) | −0.0035 (12) | 0.0019 (12) | 0.0040 (13) |
N2 | 0.0522 (16) | 0.0634 (18) | 0.095 (2) | 0.0082 (13) | −0.0074 (15) | 0.0167 (16) |
N3 | 0.0350 (12) | 0.0457 (12) | 0.0496 (13) | −0.0031 (9) | 0.0065 (10) | 0.0016 (10) |
N4 | 0.0339 (12) | 0.0459 (12) | 0.0482 (13) | −0.0017 (9) | 0.0009 (9) | −0.0022 (10) |
N5 | 0.0396 (12) | 0.0440 (12) | 0.0499 (13) | −0.0071 (9) | 0.0045 (10) | −0.0059 (10) |
O1 | 0.0398 (12) | 0.141 (2) | 0.0917 (18) | 0.0139 (13) | 0.0061 (11) | −0.0275 (15) |
O2 | 0.0578 (14) | 0.0940 (16) | 0.0865 (17) | −0.0192 (11) | −0.0082 (12) | −0.0233 (13) |
O3 | 0.0289 (9) | 0.0750 (12) | 0.0497 (11) | 0.0002 (8) | 0.0037 (8) | −0.0143 (9) |
O4 | 0.0459 (11) | 0.0504 (11) | 0.0977 (16) | −0.0049 (9) | 0.0007 (10) | −0.0121 (10) |
O5 | 0.0948 (19) | 0.0689 (16) | 0.159 (3) | 0.0270 (14) | 0.0149 (17) | 0.0107 (17) |
O6 | 0.175 (3) | 0.122 (2) | 0.155 (3) | 0.037 (2) | −0.093 (3) | 0.025 (2) |
O7 | 0.0407 (10) | 0.0532 (11) | 0.0691 (13) | −0.0016 (8) | 0.0043 (9) | −0.0156 (10) |
C1 | 0.0434 (16) | 0.0509 (15) | 0.0441 (16) | −0.0005 (12) | 0.0050 (12) | −0.0112 (12) |
C2 | 0.0387 (15) | 0.0512 (15) | 0.0504 (16) | 0.0070 (11) | 0.0089 (12) | −0.0030 (13) |
C3 | 0.0353 (14) | 0.0419 (14) | 0.0409 (15) | −0.0028 (11) | 0.0043 (11) | 0.0061 (11) |
C4 | 0.0480 (16) | 0.0460 (15) | 0.0449 (16) | −0.0012 (12) | 0.0020 (12) | −0.0068 (12) |
C5 | 0.0468 (17) | 0.0593 (17) | 0.0493 (17) | 0.0116 (12) | 0.0082 (13) | −0.0090 (13) |
C6 | 0.0351 (14) | 0.0553 (15) | 0.0395 (15) | 0.0038 (11) | 0.0037 (11) | −0.0042 (12) |
C7 | 0.0435 (18) | 0.134 (3) | 0.057 (2) | 0.0033 (17) | 0.0059 (15) | −0.0360 (19) |
C8 | 0.0284 (13) | 0.0637 (17) | 0.0404 (15) | −0.0015 (12) | 0.0061 (11) | −0.0036 (12) |
C9 | 0.0333 (14) | 0.0495 (15) | 0.0525 (17) | −0.0038 (12) | 0.0087 (12) | −0.0087 (12) |
C10 | 0.0361 (15) | 0.0474 (15) | 0.0532 (17) | 0.0056 (11) | 0.0070 (12) | −0.0056 (12) |
C11 | 0.0319 (13) | 0.0514 (15) | 0.0404 (15) | −0.0003 (11) | 0.0095 (11) | −0.0023 (11) |
C12 | 0.0378 (15) | 0.0454 (15) | 0.0516 (17) | −0.0024 (11) | 0.0075 (12) | 0.0027 (12) |
C13 | 0.0344 (14) | 0.0513 (16) | 0.0498 (16) | 0.0056 (12) | 0.0057 (12) | 0.0061 (12) |
C14 | 0.072 (2) | 0.0483 (18) | 0.129 (3) | 0.0055 (16) | 0.009 (2) | −0.0209 (18) |
C15 | 0.0331 (14) | 0.0484 (15) | 0.0519 (17) | 0.0025 (11) | 0.0061 (12) | −0.0009 (12) |
C16 | 0.0342 (14) | 0.0410 (13) | 0.0400 (14) | −0.0017 (10) | 0.0050 (11) | 0.0034 (11) |
C17 | 0.0350 (14) | 0.0425 (14) | 0.0450 (15) | −0.0034 (11) | 0.0040 (11) | 0.0025 (12) |
C18 | 0.0394 (15) | 0.0420 (14) | 0.0420 (15) | −0.0020 (11) | 0.0081 (11) | 0.0037 (11) |
C19 | 0.0559 (17) | 0.0566 (17) | 0.0601 (19) | 0.0004 (13) | 0.0140 (14) | −0.0072 (14) |
C20 | 0.0500 (17) | 0.0547 (17) | 0.069 (2) | −0.0153 (13) | 0.0060 (14) | −0.0055 (14) |
C21 | 0.0302 (14) | 0.0433 (14) | 0.0566 (18) | −0.0069 (11) | 0.0027 (12) | 0.0102 (12) |
C22 | 0.0435 (16) | 0.0712 (19) | 0.0592 (19) | −0.0060 (14) | 0.0028 (14) | 0.0157 (15) |
C23 | 0.0453 (18) | 0.085 (2) | 0.082 (2) | −0.0057 (16) | −0.0090 (17) | 0.0290 (19) |
C24 | 0.0403 (18) | 0.059 (2) | 0.123 (3) | 0.0019 (14) | 0.009 (2) | 0.023 (2) |
C25 | 0.0491 (19) | 0.0482 (17) | 0.106 (3) | −0.0026 (13) | 0.0195 (18) | 0.0006 (16) |
C26 | 0.0462 (17) | 0.0502 (16) | 0.066 (2) | −0.0015 (12) | 0.0085 (14) | 0.0014 (14) |
N1—O1 | 1.218 (3) | C8—C9 | 1.396 (3) |
N1—O2 | 1.218 (3) | C9—C10 | 1.379 (3) |
N1—C3 | 1.469 (3) | C10—C11 | 1.392 (3) |
N2—O6 | 1.171 (4) | C10—H10 | 0.9300 |
N2—O5 | 1.238 (3) | C11—C12 | 1.385 (3) |
N2—C13 | 1.473 (3) | C11—C15 | 1.460 (3) |
N3—C15 | 1.270 (3) | C12—C13 | 1.376 (3) |
N3—C16 | 1.399 (3) | C12—H12 | 0.9300 |
N4—C17 | 1.396 (3) | C14—H14A | 0.9600 |
N4—N5 | 1.410 (3) | C14—H14B | 0.9600 |
N4—C21 | 1.427 (3) | C14—H14C | 0.9600 |
N5—C18 | 1.377 (3) | C15—H15 | 0.9300 |
N5—C20 | 1.471 (3) | C16—C18 | 1.356 (3) |
O3—C8 | 1.370 (3) | C16—C17 | 1.447 (3) |
O3—C7 | 1.423 (3) | C18—C19 | 1.487 (3) |
O4—C9 | 1.365 (3) | C19—H19A | 0.9600 |
O4—C14 | 1.435 (3) | C19—H19B | 0.9600 |
O7—C17 | 1.237 (3) | C19—H19C | 0.9600 |
C1—C2 | 1.380 (3) | C20—H20A | 0.9600 |
C1—C6 | 1.386 (3) | C20—H20B | 0.9600 |
C1—H1 | 0.9300 | C20—H20C | 0.9600 |
C2—C3 | 1.379 (3) | C21—C22 | 1.384 (4) |
C2—H2 | 0.9300 | C21—C26 | 1.384 (4) |
C3—C4 | 1.371 (3) | C22—C23 | 1.382 (4) |
C4—C5 | 1.374 (3) | C22—H22 | 0.9300 |
C4—H4 | 0.9300 | C23—C24 | 1.369 (5) |
C5—C6 | 1.385 (3) | C23—H23 | 0.9300 |
C5—H5 | 0.9300 | C24—C25 | 1.376 (5) |
C6—C7 | 1.504 (3) | C24—H24 | 0.9300 |
C7—H7A | 0.9700 | C25—C26 | 1.385 (4) |
C7—H7B | 0.9700 | C25—H25 | 0.9300 |
C8—C13 | 1.393 (3) | C26—H26 | 0.9300 |
O1—N1—O2 | 122.8 (2) | C11—C12—H12 | 120.7 |
O1—N1—C3 | 118.3 (2) | C12—C13—C8 | 123.4 (2) |
O2—N1—C3 | 118.9 (2) | C12—C13—N2 | 117.6 (2) |
O6—N2—O5 | 122.4 (3) | C8—C13—N2 | 119.0 (2) |
O6—N2—C13 | 120.1 (3) | O4—C14—H14A | 109.5 |
O5—N2—C13 | 117.5 (3) | O4—C14—H14B | 109.5 |
C15—N3—C16 | 118.5 (2) | H14A—C14—H14B | 109.5 |
C17—N4—N5 | 109.92 (18) | O4—C14—H14C | 109.5 |
C17—N4—C21 | 124.28 (19) | H14A—C14—H14C | 109.5 |
N5—N4—C21 | 120.02 (19) | H14B—C14—H14C | 109.5 |
C18—N5—N4 | 105.89 (18) | N3—C15—C11 | 123.1 (2) |
C18—N5—C20 | 120.4 (2) | N3—C15—H15 | 118.5 |
N4—N5—C20 | 115.20 (19) | C11—C15—H15 | 118.5 |
C8—O3—C7 | 114.45 (18) | C18—C16—N3 | 124.0 (2) |
C9—O4—C14 | 117.2 (2) | C18—C16—C17 | 108.3 (2) |
C2—C1—C6 | 120.7 (2) | N3—C16—C17 | 127.7 (2) |
C2—C1—H1 | 119.6 | O7—C17—N4 | 123.5 (2) |
C6—C1—H1 | 119.6 | O7—C17—C16 | 131.9 (2) |
C3—C2—C1 | 118.6 (2) | N4—C17—C16 | 104.6 (2) |
C3—C2—H2 | 120.7 | C16—C18—N5 | 110.6 (2) |
C1—C2—H2 | 120.7 | C16—C18—C19 | 128.2 (2) |
C4—C3—C2 | 122.1 (2) | N5—C18—C19 | 121.3 (2) |
C4—C3—N1 | 118.8 (2) | C18—C19—H19A | 109.5 |
C2—C3—N1 | 119.1 (2) | C18—C19—H19B | 109.5 |
C3—C4—C5 | 118.3 (2) | H19A—C19—H19B | 109.5 |
C3—C4—H4 | 120.8 | C18—C19—H19C | 109.5 |
C5—C4—H4 | 120.8 | H19A—C19—H19C | 109.5 |
C4—C5—C6 | 121.5 (2) | H19B—C19—H19C | 109.5 |
C4—C5—H5 | 119.2 | N5—C20—H20A | 109.5 |
C6—C5—H5 | 119.2 | N5—C20—H20B | 109.5 |
C5—C6—C1 | 118.6 (2) | H20A—C20—H20B | 109.5 |
C5—C6—C7 | 118.2 (2) | N5—C20—H20C | 109.5 |
C1—C6—C7 | 123.1 (2) | H20A—C20—H20C | 109.5 |
O3—C7—C6 | 110.6 (2) | H20B—C20—H20C | 109.5 |
O3—C7—H7A | 109.5 | C22—C21—C26 | 120.1 (2) |
C6—C7—H7A | 109.5 | C22—C21—N4 | 121.2 (2) |
O3—C7—H7B | 109.5 | C26—C21—N4 | 118.7 (2) |
C6—C7—H7B | 109.5 | C23—C22—C21 | 119.3 (3) |
H7A—C7—H7B | 108.1 | C23—C22—H22 | 120.3 |
O3—C8—C13 | 120.7 (2) | C21—C22—H22 | 120.3 |
O3—C8—C9 | 122.1 (2) | C24—C23—C22 | 120.9 (3) |
C13—C8—C9 | 116.9 (2) | C24—C23—H23 | 119.6 |
O4—C9—C10 | 123.9 (2) | C22—C23—H23 | 119.6 |
O4—C9—C8 | 115.6 (2) | C23—C24—C25 | 119.9 (3) |
C10—C9—C8 | 120.4 (2) | C23—C24—H24 | 120.0 |
C9—C10—C11 | 121.3 (2) | C25—C24—H24 | 120.0 |
C9—C10—H10 | 119.4 | C24—C25—C26 | 120.1 (3) |
C11—C10—H10 | 119.4 | C24—C25—H25 | 120.0 |
C12—C11—C10 | 119.3 (2) | C26—C25—H25 | 120.0 |
C12—C11—C15 | 122.7 (2) | C21—C26—C25 | 119.8 (3) |
C10—C11—C15 | 118.0 (2) | C21—C26—H26 | 120.1 |
C13—C12—C11 | 118.7 (2) | C25—C26—H26 | 120.1 |
C13—C12—H12 | 120.7 | ||
C17—N4—N5—C18 | −9.2 (2) | O3—C8—C13—N2 | −8.4 (4) |
C21—N4—N5—C18 | −163.58 (19) | C9—C8—C13—N2 | 177.2 (2) |
C17—N4—N5—C20 | −145.0 (2) | O6—N2—C13—C12 | 135.8 (4) |
C21—N4—N5—C20 | 60.7 (3) | O5—N2—C13—C12 | −43.2 (4) |
C6—C1—C2—C3 | 0.6 (4) | O6—N2—C13—C8 | −42.7 (5) |
C1—C2—C3—C4 | 0.8 (4) | O5—N2—C13—C8 | 138.2 (3) |
C1—C2—C3—N1 | −178.0 (2) | C16—N3—C15—C11 | −176.8 (2) |
O1—N1—C3—C4 | −172.0 (2) | C12—C11—C15—N3 | 11.5 (4) |
O2—N1—C3—C4 | 5.4 (3) | C10—C11—C15—N3 | −168.0 (2) |
O1—N1—C3—C2 | 6.8 (3) | C15—N3—C16—C18 | −161.3 (2) |
O2—N1—C3—C2 | −175.8 (2) | C15—N3—C16—C17 | 21.5 (4) |
C2—C3—C4—C5 | −1.3 (4) | N5—N4—C17—O7 | −173.0 (2) |
N1—C3—C4—C5 | 177.5 (2) | C21—N4—C17—O7 | −20.0 (4) |
C3—C4—C5—C6 | 0.3 (4) | N5—N4—C17—C16 | 6.8 (2) |
C4—C5—C6—C1 | 1.0 (4) | C21—N4—C17—C16 | 159.8 (2) |
C4—C5—C6—C7 | −176.9 (3) | C18—C16—C17—O7 | 178.0 (3) |
C2—C1—C6—C5 | −1.5 (4) | N3—C16—C17—O7 | −4.5 (4) |
C2—C1—C6—C7 | 176.4 (3) | C18—C16—C17—N4 | −1.8 (3) |
C8—O3—C7—C6 | −178.1 (2) | N3—C16—C17—N4 | 175.7 (2) |
C5—C6—C7—O3 | −164.2 (2) | N3—C16—C18—N5 | 178.4 (2) |
C1—C6—C7—O3 | 17.9 (4) | C17—C16—C18—N5 | −4.0 (3) |
C7—O3—C8—C13 | 116.4 (3) | N3—C16—C18—C19 | −1.7 (4) |
C7—O3—C8—C9 | −69.5 (3) | C17—C16—C18—C19 | 175.9 (2) |
C14—O4—C9—C10 | −11.0 (4) | N4—N5—C18—C16 | 8.1 (3) |
C14—O4—C9—C8 | 171.8 (3) | C20—N5—C18—C16 | 141.0 (2) |
O3—C8—C9—O4 | 2.0 (3) | N4—N5—C18—C19 | −171.8 (2) |
C13—C8—C9—O4 | 176.2 (2) | C20—N5—C18—C19 | −39.0 (3) |
O3—C8—C9—C10 | −175.3 (2) | C17—N4—C21—C22 | −123.6 (3) |
C13—C8—C9—C10 | −1.1 (4) | N5—N4—C21—C22 | 26.8 (3) |
O4—C9—C10—C11 | −174.8 (2) | C17—N4—C21—C26 | 55.4 (3) |
C8—C9—C10—C11 | 2.3 (4) | N5—N4—C21—C26 | −154.1 (2) |
C9—C10—C11—C12 | −1.2 (4) | C26—C21—C22—C23 | −0.6 (4) |
C9—C10—C11—C15 | 178.3 (2) | N4—C21—C22—C23 | 178.4 (2) |
C10—C11—C12—C13 | −1.1 (4) | C21—C22—C23—C24 | −0.2 (4) |
C15—C11—C12—C13 | 179.4 (2) | C22—C23—C24—C25 | 0.6 (4) |
C11—C12—C13—C8 | 2.3 (4) | C23—C24—C25—C26 | −0.1 (4) |
C11—C12—C13—N2 | −176.2 (2) | C22—C21—C26—C25 | 1.1 (4) |
O3—C8—C13—C12 | 173.1 (2) | N4—C21—C26—C25 | −178.0 (2) |
C9—C8—C13—C12 | −1.2 (4) | C24—C25—C26—C21 | −0.7 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
C15—H15···O7 | 0.93 | 2.35 | 2.997 (3) | 127 |
C4—H4···O7i | 0.93 | 2.56 | 3.447 (3) | 159 |
Symmetry code: (i) x−1/2, −y−1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C26H23N5O7 |
Mr | 517.49 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 294 |
a, b, c (Å) | 25.671 (11), 11.933 (5), 16.617 (7) |
β (°) | 103.972 (7) |
V (Å3) | 4940 (4) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.10 |
Crystal size (mm) | 0.20 × 0.18 × 0.10 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.938, 0.989 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12593, 4363, 2652 |
Rint | 0.039 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.048, 0.139, 1.02 |
No. of reflections | 4363 |
No. of parameters | 346 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.39, −0.21 |
Computer programs: SMART (Bruker, 1999), SAINT (Bruker, 1999), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
C15—H15···O7 | 0.93 | 2.35 | 2.997 (3) | 127 |
C4—H4···O7i | 0.93 | 2.56 | 3.447 (3) | 159 |
Symmetry code: (i) x−1/2, −y−1/2, z−1/2. |
References
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1–19. CSD CrossRef Web of Science Google Scholar
Bruker (1999). SMART and SAINT for Windows NT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Chen, X. & Yu, M. (2006). Acta Cryst. E62, o4728–o4729. Web of Science CSD CrossRef IUCr Journals Google Scholar
Li, J.-Z., Xu, B., Li, S.-X., Zeng, W. & Qin, S.-Y. (2005). Transition Met. Chem. 30, 669–676. Web of Science CrossRef CAS Google Scholar
Santos, M. L. P., Bagatin, I. A., Pereira, E. M. & Ferreira, A. M. D. C. (2001). J. Chem. Soc. Dalton Trans. pp. 838–844. Web of Science CrossRef Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Zhang, W.-J., Duan, Z.-Y. & Zhao, X. (2006). Acta Cryst. E62, o2834–o2835. Web of Science CSD CrossRef IUCr Journals Google Scholar
This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Schiff bases have extensively been studied because of their significant biological activity such as protein and enzyme mimics (Santos et al., 2001). Consequently, many Schiff base derivatives have been synthesized and employed to develop protein and enzyme mimics such as models to mimic hydrolase in the hydrolysis of p-nitrophenyl picolinate (Li et al., 2005).
Among the large number of compounds, 4-amino-1,5-dimethyl-2-phenylpyrazol-3-one forms a variety of Schiff bases with aldehydes, and the synthesis and crystal structures of some of them, such as (E)-4-(4-(4-chlorobenzyloxy)-3-ethoxybenzylideneamino) -1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one (Zhang et al., 2006) and (E)-2-(2-((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-ylimino) methyl)phenoxy)ethyl 4-methylbenzenesulfonate(Chen & Yu, 2006) have been reported.
Structural information is useful when investigating the coordination properties of Schiff bases functioning as ligands. We report here the synthesis and molecular structure of the title Schiff base compound, (I), (Fig. 1)
In the title molecule (Fig. 1), bond lengths and angles are within normal ranges (Allen et al., 1987). The pyrazolone ring (C16—C18/N3—N5/O7) is nearly planar, with an r.m.s. deviation for fitted atoms of 0.0379 Å. It makes a dihedral angle of 44.37 (9)° with the attached phenyl ring (C21—C26). The central benzene ring (C8—C13/C15/O3/O4) is almost planar, with an r.m.s. deviation for fitted atoms of 0.0342 Å. This group makes dihedral angles of 35.08 (6)°, 48.75 (7)° and 69.55 (8)°, respectively, with the the pyrazolone ring (C16—C18/N3—N5/O7), the nitrobenzene ring (C1—C6) and the terminal phenyl ring (C21—C26).
An intramolecular C15—H15···O7═C17 hydrogen bond is found in (I) (Table 1), which helps to stabilize the conformation of the molecule. Packing is stabilized by weak, non-classical intermolecular C4—H4···O7═C117 hydrogen bonds that link adjacent molecules into one-dimensional chains (Table 1, Fig. 2).