organic compounds
Methyl N-[(4-chlorophenyl)(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-ylidene)methyl]glycinate
aCollege of Chemistry and Life Science, Tianjin Normal University, Tianjin 300387, People's Republic of China
*Correspondence e-mail: zxin_tj@126.com
The title compound, C20H18ClN3O3, is in an enamine–keto form, stabilized by two strong intramolecular N—H⋯O hydrogen bonds. The pyrazole ring is oriented at dihedral angles of 4.13 (3) and 85.60 (3)° with respect to the aromatic rings. The dihedral angle between the aromatic rings is 81.79 (3)°. In the intermolecular C—H⋯O hydrogen bonds link the molecules into double chains, which are further linked by weak C—H⋯π interactions, forming a two-dimensional network.
Related literature
For general background to Schiff base compounds in coordination chemistry, catalysis and enzymatic reactions, magnetism and molecular architectures, see: Habibi et al. (2007). For the anti-bacterial properties of derived from 4-acyl-5-pyrazolones and their metal complexes, see: Li et al. (1997, 2004). For the anti-bacterial and biological activity of amino acid see: Xiong et al. (1993). For related structures, see: Pettinari et al. (1994); Wang et al. (2003); Zhang et al. (2005); Zhu et al. (2005). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2003); cell SAINT (Bruker, 2001); 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) and DIAMOND (Brandenburg & Berndt, 1999); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536809027858/hk2736sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809027858/hk2736Isup2.hkl
The title compound was synthesized by refluxing a mixture of 1-phenyl-3-methyl-4-(p-chlor-benzyl)-5-pyrazolone (15 mmol) (Pettinari et al., 1994) and glycine methyl ester (15 mmol) in ethanol (100 ml) over a steam bath for about 5 h. The product was recrystallized from ethanol, affording pale yellow crystals suitable for X-ray analysis. Analysis calculated for C20H18ClN3O3:C 62.58, H 4.73, N 10.95%; found: C 62.55, H 4.70, N 10.91%.
H atoms were positioned geometrically with N-H = 0.86 Å (for NH) and C-H = 0.93, 0.97 and 0.96 Å, for aromatic, methylene and methyl H atoms, respectively, and constrained to ride on their parent atoms, with Uiso(H) = xUeq(C,N), where x = 1.5 for methyl H and x = 1.2 for all other H atoms.
Data collection: APEX2 (Bruker, 2003); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg & Berndt, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The molecular structure of the title molecule with the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. Hydrogen bonds are shown as dashed lines. | |
Fig. 2. The one-dimensional plane formed by the intermolecular C–H···O hydrogen bonds. | |
Fig. 3. The two-dimensional network produced by the intermolecular C–H···π interactions. |
C20H18ClN3O3 | Z = 2 |
Mr = 383.82 | F(000) = 400 |
Triclinic, P1 | Dx = 1.331 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.309 (4) Å | Cell parameters from 1323 reflections |
b = 10.222 (4) Å | θ = 2.3–25.9° |
c = 10.685 (5) Å | µ = 0.23 mm−1 |
α = 86.275 (8)° | T = 296 K |
β = 82.772 (8)° | Block, colorless |
γ = 71.749 (5)° | 0.24 × 0.20 × 0.18 mm |
V = 957.6 (7) Å3 |
Bruker APEXII CCD area-detector diffractometer | 3364 independent reflections |
Radiation source: fine-focus sealed tube | 1975 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.019 |
ϕ and ω scans | θmax = 25.0°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −11→10 |
Tmin = 0.947, Tmax = 0.960 | k = −11→12 |
4927 measured reflections | l = −11→12 |
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)] = 0.075 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.229 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.1339P)2] where P = (Fo2 + 2Fc2)/3 |
3364 reflections | (Δ/σ)max < 0.001 |
246 parameters | Δρmax = 0.54 e Å−3 |
0 restraints | Δρmin = −0.44 e Å−3 |
C20H18ClN3O3 | γ = 71.749 (5)° |
Mr = 383.82 | V = 957.6 (7) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.309 (4) Å | Mo Kα radiation |
b = 10.222 (4) Å | µ = 0.23 mm−1 |
c = 10.685 (5) Å | T = 296 K |
α = 86.275 (8)° | 0.24 × 0.20 × 0.18 mm |
β = 82.772 (8)° |
Bruker APEXII CCD area-detector diffractometer | 3364 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1975 reflections with I > 2σ(I) |
Tmin = 0.947, Tmax = 0.960 | Rint = 0.019 |
4927 measured reflections |
R[F2 > 2σ(F2)] = 0.075 | 0 restraints |
wR(F2) = 0.229 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.54 e Å−3 |
3364 reflections | Δρmin = −0.44 e Å−3 |
246 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 > 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. |
x | y | z | Uiso*/Ueq | ||
Cl1 | −0.55778 (16) | 0.32750 (16) | 0.61403 (15) | 0.1056 (6) | |
O1 | 0.2121 (3) | 0.5392 (3) | 0.8771 (2) | 0.0536 (7) | |
O2 | 0.2655 (4) | 0.1981 (3) | 1.0279 (3) | 0.0771 (9) | |
O3 | 0.1496 (3) | 0.0367 (3) | 1.0650 (3) | 0.0716 (9) | |
N1 | 0.1065 (3) | 0.7252 (3) | 0.7427 (3) | 0.0520 (8) | |
N2 | −0.0161 (4) | 0.7657 (3) | 0.6679 (3) | 0.0573 (9) | |
N3 | 0.0591 (3) | 0.3478 (3) | 0.8789 (3) | 0.0510 (8) | |
H3 | 0.1341 | 0.3706 | 0.8998 | 0.061* | |
C1 | 0.3191 (5) | 0.7807 (4) | 0.8132 (4) | 0.0666 (12) | |
H1 | 0.3399 | 0.7016 | 0.8647 | 0.080* | |
C2 | 0.4086 (5) | 0.8654 (5) | 0.8087 (5) | 0.0801 (14) | |
H2 | 0.4895 | 0.8424 | 0.8574 | 0.096* | |
C3 | 0.3824 (6) | 0.9811 (6) | 0.7354 (6) | 0.0890 (15) | |
H3A | 0.4449 | 1.0368 | 0.7327 | 0.107* | |
C4 | 0.2603 (7) | 1.0159 (5) | 0.6639 (5) | 0.0880 (15) | |
H4 | 0.2405 | 1.0960 | 0.6138 | 0.106* | |
C5 | 0.1672 (5) | 0.9319 (5) | 0.6663 (4) | 0.0697 (12) | |
H5 | 0.0855 | 0.9552 | 0.6184 | 0.084* | |
C6 | 0.1992 (4) | 0.8118 (4) | 0.7424 (3) | 0.0525 (9) | |
C7 | −0.0797 (4) | 0.6684 (4) | 0.6807 (3) | 0.0526 (10) | |
C8 | −0.2151 (5) | 0.6816 (5) | 0.6135 (4) | 0.0776 (14) | |
H8A | −0.2512 | 0.7733 | 0.5784 | 0.116* | |
H8B | −0.2942 | 0.6634 | 0.6720 | 0.116* | |
H8C | −0.1870 | 0.6165 | 0.5470 | 0.116* | |
C9 | −0.0021 (4) | 0.5568 (4) | 0.7624 (3) | 0.0458 (9) | |
C10 | 0.1185 (4) | 0.5995 (4) | 0.8021 (3) | 0.0450 (8) | |
C11 | −0.0299 (4) | 0.4347 (4) | 0.8029 (3) | 0.0432 (8) | |
C12 | −0.1577 (4) | 0.3973 (4) | 0.7612 (3) | 0.0454 (9) | |
C13 | −0.1405 (5) | 0.3365 (5) | 0.6462 (4) | 0.0683 (12) | |
H13 | −0.0457 | 0.3108 | 0.5986 | 0.082* | |
C14 | −0.2631 (6) | 0.3136 (5) | 0.6015 (4) | 0.0770 (14) | |
H14 | −0.2513 | 0.2720 | 0.5244 | 0.092* | |
C15 | −0.4031 (5) | 0.3528 (4) | 0.6722 (4) | 0.0591 (11) | |
C16 | −0.4215 (4) | 0.4092 (4) | 0.7886 (4) | 0.0604 (11) | |
H16 | −0.5155 | 0.4314 | 0.8373 | 0.072* | |
C17 | −0.2987 (4) | 0.4323 (4) | 0.8322 (3) | 0.0526 (10) | |
H17 | −0.3107 | 0.4719 | 0.9103 | 0.063* | |
C18 | 0.0428 (4) | 0.2179 (4) | 0.9305 (4) | 0.0545 (10) | |
H18A | 0.0493 | 0.1573 | 0.8625 | 0.065* | |
H18B | −0.0560 | 0.2336 | 0.9794 | 0.065* | |
C19 | 0.1662 (4) | 0.1521 (4) | 1.0130 (4) | 0.0561 (10) | |
C20 | 0.2628 (6) | −0.0381 (5) | 1.1457 (5) | 0.0911 (16) | |
H20A | 0.3615 | −0.0631 | 1.0979 | 0.137* | |
H20B | 0.2404 | −0.1199 | 1.1791 | 0.137* | |
H20C | 0.2620 | 0.0188 | 1.2140 | 0.137* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0921 (10) | 0.1261 (12) | 0.1282 (12) | −0.0573 (9) | −0.0643 (9) | 0.0046 (9) |
O1 | 0.0457 (14) | 0.0636 (16) | 0.0557 (15) | −0.0186 (12) | −0.0205 (12) | 0.0069 (13) |
O2 | 0.0713 (19) | 0.075 (2) | 0.098 (2) | −0.0316 (17) | −0.0458 (17) | 0.0202 (17) |
O3 | 0.0718 (19) | 0.0580 (18) | 0.091 (2) | −0.0220 (15) | −0.0336 (16) | 0.0132 (16) |
N1 | 0.0506 (18) | 0.058 (2) | 0.0516 (18) | −0.0206 (15) | −0.0159 (14) | 0.0053 (15) |
N2 | 0.0513 (18) | 0.068 (2) | 0.0531 (19) | −0.0161 (17) | −0.0172 (15) | 0.0106 (16) |
N3 | 0.0406 (16) | 0.059 (2) | 0.0574 (18) | −0.0180 (14) | −0.0197 (14) | 0.0065 (16) |
C1 | 0.060 (3) | 0.066 (3) | 0.080 (3) | −0.025 (2) | −0.021 (2) | 0.006 (2) |
C2 | 0.066 (3) | 0.080 (3) | 0.104 (4) | −0.032 (3) | −0.022 (3) | −0.001 (3) |
C3 | 0.091 (4) | 0.077 (3) | 0.110 (4) | −0.044 (3) | −0.012 (3) | 0.007 (3) |
C4 | 0.107 (4) | 0.074 (3) | 0.089 (4) | −0.040 (3) | −0.016 (3) | 0.024 (3) |
C5 | 0.078 (3) | 0.067 (3) | 0.064 (3) | −0.022 (2) | −0.018 (2) | 0.010 (2) |
C6 | 0.054 (2) | 0.055 (2) | 0.049 (2) | −0.0177 (19) | −0.0023 (17) | −0.0072 (18) |
C7 | 0.046 (2) | 0.068 (3) | 0.045 (2) | −0.018 (2) | −0.0144 (17) | 0.0054 (19) |
C8 | 0.067 (3) | 0.101 (4) | 0.074 (3) | −0.033 (3) | −0.038 (2) | 0.031 (3) |
C9 | 0.0382 (19) | 0.061 (2) | 0.0395 (18) | −0.0157 (17) | −0.0096 (15) | 0.0030 (17) |
C10 | 0.0407 (19) | 0.052 (2) | 0.0415 (19) | −0.0110 (16) | −0.0096 (15) | −0.0003 (17) |
C11 | 0.0347 (17) | 0.057 (2) | 0.0381 (18) | −0.0138 (16) | −0.0038 (14) | −0.0054 (16) |
C12 | 0.0424 (19) | 0.055 (2) | 0.0407 (18) | −0.0156 (17) | −0.0115 (15) | −0.0021 (16) |
C13 | 0.058 (3) | 0.098 (4) | 0.052 (2) | −0.027 (2) | −0.0022 (19) | −0.022 (2) |
C14 | 0.086 (3) | 0.101 (4) | 0.057 (3) | −0.038 (3) | −0.020 (2) | −0.020 (2) |
C15 | 0.060 (3) | 0.064 (3) | 0.063 (3) | −0.026 (2) | −0.032 (2) | 0.008 (2) |
C16 | 0.042 (2) | 0.071 (3) | 0.069 (3) | −0.0180 (19) | −0.0127 (18) | −0.001 (2) |
C17 | 0.040 (2) | 0.068 (2) | 0.049 (2) | −0.0129 (18) | −0.0076 (16) | −0.0108 (19) |
C18 | 0.054 (2) | 0.056 (2) | 0.060 (2) | −0.0224 (19) | −0.0170 (19) | 0.0012 (19) |
C19 | 0.054 (2) | 0.053 (2) | 0.064 (3) | −0.017 (2) | −0.0137 (19) | −0.004 (2) |
C20 | 0.093 (4) | 0.068 (3) | 0.111 (4) | −0.013 (3) | −0.053 (3) | 0.027 (3) |
Cl1—C15 | 1.734 (4) | C7—C8 | 1.494 (5) |
O1—C10 | 1.248 (4) | C8—H8A | 0.9600 |
O2—C19 | 1.191 (4) | C8—H8B | 0.9600 |
O3—C19 | 1.316 (5) | C8—H8C | 0.9600 |
O3—C20 | 1.442 (5) | C9—C11 | 1.384 (5) |
N1—C10 | 1.374 (5) | C9—C10 | 1.443 (5) |
N1—C6 | 1.416 (5) | C11—C12 | 1.484 (5) |
N1—N2 | 1.416 (4) | C12—C13 | 1.382 (5) |
N2—C7 | 1.300 (5) | C12—C17 | 1.385 (5) |
N3—C11 | 1.323 (4) | C13—C14 | 1.380 (6) |
N3—C18 | 1.449 (5) | C13—H13 | 0.9300 |
N3—H3 | 0.8600 | C14—C15 | 1.376 (6) |
C1—C6 | 1.371 (5) | C14—H14 | 0.9300 |
C1—C2 | 1.372 (6) | C15—C16 | 1.373 (6) |
C1—H1 | 0.9300 | C16—C17 | 1.377 (5) |
C2—C3 | 1.349 (7) | C16—H16 | 0.9300 |
C2—H2 | 0.9300 | C17—H17 | 0.9300 |
C3—C4 | 1.389 (7) | C18—C19 | 1.498 (5) |
C3—H3A | 0.9300 | C18—H18A | 0.9700 |
C4—C5 | 1.396 (7) | C18—H18B | 0.9700 |
C4—H4 | 0.9300 | C20—H20A | 0.9600 |
C5—C6 | 1.399 (6) | C20—H20B | 0.9600 |
C5—H5 | 0.9300 | C20—H20C | 0.9600 |
C7—C9 | 1.449 (5) | ||
C19—O3—C20 | 115.9 (3) | O1—C10—C9 | 128.3 (3) |
C10—N1—C6 | 130.1 (3) | N1—C10—C9 | 105.4 (3) |
C10—N1—N2 | 111.5 (3) | N3—C11—C9 | 120.2 (3) |
C6—N1—N2 | 118.3 (3) | N3—C11—C12 | 118.5 (3) |
C7—N2—N1 | 106.7 (3) | C9—C11—C12 | 121.2 (3) |
C11—N3—C18 | 126.5 (3) | C13—C12—C17 | 119.2 (3) |
C11—N3—H3 | 116.8 | C13—C12—C11 | 120.2 (3) |
C18—N3—H3 | 116.8 | C17—C12—C11 | 120.5 (3) |
C6—C1—C2 | 120.5 (4) | C14—C13—C12 | 120.4 (4) |
C6—C1—H1 | 119.7 | C14—C13—H13 | 119.8 |
C2—C1—H1 | 119.7 | C12—C13—H13 | 119.8 |
C3—C2—C1 | 121.7 (5) | C15—C14—C13 | 119.4 (4) |
C3—C2—H2 | 119.2 | C15—C14—H14 | 120.3 |
C1—C2—H2 | 119.2 | C13—C14—H14 | 120.3 |
C2—C3—C4 | 118.9 (5) | C16—C15—C14 | 121.1 (4) |
C2—C3—H3A | 120.5 | C16—C15—Cl1 | 119.6 (3) |
C4—C3—H3A | 120.5 | C14—C15—Cl1 | 119.2 (3) |
C3—C4—C5 | 120.8 (5) | C15—C16—C17 | 119.1 (4) |
C3—C4—H4 | 119.6 | C15—C16—H16 | 120.5 |
C5—C4—H4 | 119.6 | C17—C16—H16 | 120.5 |
C4—C5—C6 | 118.6 (4) | C16—C17—C12 | 120.8 (3) |
C4—C5—H5 | 120.7 | C16—C17—H17 | 119.6 |
C6—C5—H5 | 120.7 | C12—C17—H17 | 119.6 |
C1—C6—C5 | 119.5 (4) | N3—C18—C19 | 109.4 (3) |
C1—C6—N1 | 122.0 (4) | N3—C18—H18A | 109.8 |
C5—C6—N1 | 118.5 (4) | C19—C18—H18A | 109.8 |
N2—C7—C9 | 111.6 (3) | N3—C18—H18B | 109.8 |
N2—C7—C8 | 119.7 (3) | C19—C18—H18B | 109.8 |
C9—C7—C8 | 128.7 (4) | H18A—C18—H18B | 108.2 |
C7—C8—H8A | 109.5 | O2—C19—O3 | 125.3 (4) |
C7—C8—H8B | 109.5 | O2—C19—C18 | 124.3 (4) |
H8A—C8—H8B | 109.5 | O3—C19—C18 | 110.3 (3) |
C7—C8—H8C | 109.5 | O3—C20—H20A | 109.5 |
H8A—C8—H8C | 109.5 | O3—C20—H20B | 109.5 |
H8B—C8—H8C | 109.5 | H20A—C20—H20B | 109.5 |
C11—C9—C10 | 123.5 (3) | O3—C20—H20C | 109.5 |
C11—C9—C7 | 131.6 (3) | H20A—C20—H20C | 109.5 |
C10—C9—C7 | 104.9 (3) | H20B—C20—H20C | 109.5 |
O1—C10—N1 | 126.3 (3) | ||
C10—N1—N2—C7 | 0.4 (4) | C7—C9—C10—N1 | −1.0 (4) |
C6—N1—N2—C7 | 177.9 (3) | C18—N3—C11—C9 | 178.9 (3) |
C6—C1—C2—C3 | 0.0 (7) | C18—N3—C11—C12 | −2.0 (5) |
C1—C2—C3—C4 | 0.7 (8) | C10—C9—C11—N3 | −2.2 (5) |
C2—C3—C4—C5 | −0.8 (8) | C7—C9—C11—N3 | 180.0 (4) |
C3—C4—C5—C6 | 0.0 (7) | C10—C9—C11—C12 | 178.7 (3) |
C2—C1—C6—C5 | −0.8 (6) | C7—C9—C11—C12 | 0.8 (6) |
C2—C1—C6—N1 | 178.6 (4) | N3—C11—C12—C13 | −96.3 (4) |
C4—C5—C6—C1 | 0.8 (6) | C9—C11—C12—C13 | 82.8 (5) |
C4—C5—C6—N1 | −178.7 (4) | N3—C11—C12—C17 | 88.6 (4) |
C10—N1—C6—C1 | −3.6 (6) | C9—C11—C12—C17 | −92.2 (4) |
N2—N1—C6—C1 | 179.3 (3) | C17—C12—C13—C14 | 1.4 (7) |
C10—N1—C6—C5 | 175.8 (4) | C11—C12—C13—C14 | −173.8 (4) |
N2—N1—C6—C5 | −1.2 (5) | C12—C13—C14—C15 | 0.5 (7) |
N1—N2—C7—C9 | −1.0 (4) | C13—C14—C15—C16 | −2.7 (7) |
N1—N2—C7—C8 | 179.4 (3) | C13—C14—C15—Cl1 | 178.5 (4) |
N2—C7—C9—C11 | 179.4 (4) | C14—C15—C16—C17 | 3.0 (6) |
C8—C7—C9—C11 | −1.0 (7) | Cl1—C15—C16—C17 | −178.2 (3) |
N2—C7—C9—C10 | 1.3 (4) | C15—C16—C17—C12 | −1.1 (6) |
C8—C7—C9—C10 | −179.2 (4) | C13—C12—C17—C16 | −1.0 (6) |
C6—N1—C10—O1 | 5.2 (6) | C11—C12—C17—C16 | 174.1 (4) |
N2—N1—C10—O1 | −177.6 (3) | C11—N3—C18—C19 | −179.5 (3) |
C6—N1—C10—C9 | −176.7 (3) | C20—O3—C19—O2 | −0.2 (6) |
N2—N1—C10—C9 | 0.5 (4) | C20—O3—C19—C18 | 179.2 (4) |
C11—C9—C10—O1 | −1.3 (6) | N3—C18—C19—O2 | −3.2 (6) |
C7—C9—C10—O1 | 177.0 (3) | N3—C18—C19—O3 | 177.4 (3) |
C11—C9—C10—N1 | −179.3 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···O1 | 0.86 | 2.06 | 2.755 (4) | 138 |
N3—H3···O2 | 0.86 | 2.29 | 2.679 (4) | 108 |
C16—H16···O1i | 0.93 | 2.42 | 3.287 (5) | 155 |
C17—H17···O1ii | 0.93 | 2.54 | 3.359 (4) | 147 |
C20—H20B···Cg3iii | 0.96 | 2.69 | 3.604 (4) | 160 |
Symmetry codes: (i) x−1, y, z; (ii) −x, −y+1, −z+2; (iii) −x, −y, −z+2. |
Experimental details
Crystal data | |
Chemical formula | C20H18ClN3O3 |
Mr | 383.82 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 296 |
a, b, c (Å) | 9.309 (4), 10.222 (4), 10.685 (5) |
α, β, γ (°) | 86.275 (8), 82.772 (8), 71.749 (5) |
V (Å3) | 957.6 (7) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.23 |
Crystal size (mm) | 0.24 × 0.20 × 0.18 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.947, 0.960 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 4927, 3364, 1975 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.075, 0.229, 1.05 |
No. of reflections | 3364 |
No. of parameters | 246 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.54, −0.44 |
Computer programs: APEX2 (Bruker, 2003), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg & Berndt, 1999), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···O1 | 0.86 | 2.06 | 2.755 (4) | 137.5 |
N3—H3···O2 | 0.86 | 2.29 | 2.679 (4) | 107.8 |
C16—H16···O1i | 0.93 | 2.42 | 3.287 (5) | 154.9 |
C17—H17···O1ii | 0.93 | 2.54 | 3.359 (4) | 147.3 |
C20—H20B···Cg3iii | 0.96 | 2.69 | 3.604 (4) | 160 |
Symmetry codes: (i) x−1, y, z; (ii) −x, −y+1, −z+2; (iii) −x, −y, −z+2. |
References
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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 base compounds play an important role in the development of coordination chemistry related to catalysis and enzymatic reactions, magnetism, and molecular architectures [Habibi et al., 2007]. In recent years, the Schiff bases derived from 4-acyl-5-pyrazolones and their metal complexes have been studied widely for their high antibacterial activation [Li et al., 1997, 2004]. Amino acid esters also possess good antibacterial and biological activations [Xiong et al., 1993]. Structures of Schiff bases derived from 4-acyl-5-pyrazolones and amino acid esters and closely related to the title compound have been reported [Zhu et al., 2005; Zhang et al., 2005]. We report herein the crystal structure of the title compound, (I).
In the molecule of the title compound, (I), (Fig. 1) the bond lengths (Allen et al., 1987) and angles are within normal ranges. Rings A (C1-C6), B (N1/N2/C7/C9/C10) and C (C12-C17) are, of course, planar, and they are oriented at a dihedral angles of A/B = 4.13 (3), A/C = 81.79 (3) and B/C = 85.60 (3) °. Intramolecular N-H···O hydrogen bonds (Table 1) stabilize the enamine-keto form as in 4-{[3,4-dihydro-5-methyl-3-oxo-2-phenyl-2H-pyrazol-4-ylidene]-(phenyl)methyl]amino}-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one, (II) (Wang et al., 2003), and result in the formations of planar five- and six-membered rings: D (O2/N3/C18/C19/H3) and E (O1/N3/C9-C11/H3), in which the dihedral angle between them is D/E = 3.83 (4)°. Ring D is oriented with respect to the adjacent ring B at a dihedral angle of 3.12 (4)°. The dihedral angle between ring B and planar (O1/N3/C9-C11) moiety is 0.94 (3)°, which is reported as 3.56 (3)° in (II).
In the crystal structure, intermolecular C-H···O hydrogen bonds (Table 1) link the molecules into double chains (Fig. 2), in which they are further linked by weak C—H···π interactions (Table 1) to form a two-dimensional network (Fig. 3), in which they may be effective in the stabilization of the structure.