organic compounds
(E,E)-3,3′-Dimethyl-1,1′-diphenyl-4,4′-{[3-azapentane-1,5-diylbis(azanediyl)]bis(phenylmethylidyne)}di-1H-pyrazol-5(4H)-one
aDepartment of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, People's Republic of China, and bInstitute of Functional Materials, Jiangxi University of Finance & Economics, Nanchang 330013, People's Republic of China
*Correspondence e-mail: wangyuan08@hpu.edu.cn
The 38H37N7O2, contains one half-molecule, situated on a twofold rotational axis, in which one amino group is involved in intramolecular N—H⋯O hydrogen bond and the two phenyl rings are twisted from the plane of pyrazolone ring by 26.69 (10) and 79.64 (8)°. The crystal packing exhibits no classical intermolecular contacts.
of the title compound, CRelated literature
For the synthesis of the title compound and the DNA binding properties of its transition metal complexes, see: Yang et al. (2000); Wang & Yang (2005). For the similar structure of (E,E)-3,3′-dimethyl-1,1′-diphenyl-4,4′-{(ethane-1,2-diyldiimino)bis[(2-furyl)-methylidyne]}di-1H-pyrazol-5(4H)-one, see: Wang (2010).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); 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/S1600536810048981/cv5005sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810048981/cv5005Isup2.hkl
The title compound was prepared according to the literature (Wang et al., 2005). 1.1 g (4 mmol) of PMBP were dissolved in EtOH (50 ml), and the EtOH solution containing diethylenetriamine (0.2 g, 2 mmol) was added dropwise. The mixture refluxed on a water bath for 4 h, then part of the solvent was removed on a rotary evaporator. After cooling to 273 K, a large amount of yellow precipitate separated out. Yellow block crystals were obtained by slow evaporation of an ethanol /chloroform (1:1) solution.
All H atoms were placed in calculated positions, with C—H = 0.93–0.97 Å and N—H = 0.86 Å, and were treated as riding, with Uiso(H) = 1.2-1.5 Ueq of the parent atom.
The
derivatives of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and their metal complexes have been widely studied because of their high biological and pharmaceutical activities (Yang et al., 2000; Wang et al., 2005). For our interest in coordination chemistry, the of the title compound was determined by X-ray diffraction analysis.The
of the title compound contains a half of the molecule situated on a twofold rotational axis. In the independent part of the molecule, one amino group is invloved in intramolecular N—H···O hydrogen bond (Table 1), and two phenyl rings are twisted from the plane of pyrazolone ring at 26.69 (10)° and 79.64 (8)°, respectively. The crystal packing exhibits no classical intermolecular contacts.For the synthesis of the title compound and the DNA binding properties of its transition metal complexes, see: Yang et al. (2000); Wang et al. (2005). For the similar structure of (E,E)-3,3'-dimethyl-1,1'-diphenyl-4,4'-{(ethane-1,2-diyldiimino)bis[(2-furyl)-methylidyne]}di-1H-pyrazol-5(4H)-one, see: Wang et al. (2010).
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); 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 molecular structure shown with 30% probability displacement ellipsoids. Unlabelled atoms are related with the labelled ones by symmetry operation (-x, y, -z+1/2). |
C38H37N7O2 | F(000) = 1320 |
Mr = 623.75 | Dx = 1.264 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
a = 20.3219 (8) Å | Cell parameters from 1721 reflections |
b = 8.1990 (2) Å | θ = 2.5–22.0° |
c = 20.5468 (6) Å | µ = 0.08 mm−1 |
β = 106.748 (2)° | T = 296 K |
V = 3278.27 (18) Å3 | Block, yellow |
Z = 4 | 0.23 × 0.21 × 0.15 mm |
Bruker SMART APEXII CCD diffractometer | 3765 independent reflections |
Radiation source: fine-focus sealed tube | 1886 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.021 |
phi and ω scans | θmax = 27.7°, θmin = 2.1° |
Absorption correction: multi-scan (SADABS; Bruker, 2007) | h = −26→20 |
Tmin = 0.982, Tmax = 0.988 | k = −8→10 |
8269 measured reflections | l = −26→25 |
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)] = 0.054 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.179 | H-atom parameters constrained |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0884P)2 + 0.1149P] where P = (Fo2 + 2Fc2)/3 |
3765 reflections | (Δ/σ)max < 0.001 |
214 parameters | Δρmax = 0.34 e Å−3 |
0 restraints | Δρmin = −0.29 e Å−3 |
C38H37N7O2 | V = 3278.27 (18) Å3 |
Mr = 623.75 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 20.3219 (8) Å | µ = 0.08 mm−1 |
b = 8.1990 (2) Å | T = 296 K |
c = 20.5468 (6) Å | 0.23 × 0.21 × 0.15 mm |
β = 106.748 (2)° |
Bruker SMART APEXII CCD diffractometer | 3765 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2007) | 1886 reflections with I > 2σ(I) |
Tmin = 0.982, Tmax = 0.988 | Rint = 0.021 |
8269 measured reflections |
R[F2 > 2σ(F2)] = 0.054 | 0 restraints |
wR(F2) = 0.179 | H-atom parameters constrained |
S = 1.01 | Δρmax = 0.34 e Å−3 |
3765 reflections | Δρmin = −0.29 e Å−3 |
214 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 | ||
O1 | 0.06573 (8) | 0.23883 (18) | 0.35444 (8) | 0.0809 (5) | |
N1 | 0.14838 (9) | 0.0606 (2) | 0.41990 (8) | 0.0707 (5) | |
C7 | 0.12657 (11) | 0.1980 (3) | 0.38051 (10) | 0.0645 (6) | |
C12 | 0.25215 (10) | 0.4844 (3) | 0.32781 (11) | 0.0661 (6) | |
N2 | 0.21985 (10) | 0.0439 (3) | 0.43823 (10) | 0.0819 (6) | |
N3 | 0.12874 (9) | 0.4629 (2) | 0.29494 (10) | 0.0833 (6) | |
H3A | 0.0927 | 0.4145 | 0.2992 | 0.100* | |
C11 | 0.18821 (10) | 0.4066 (3) | 0.33364 (11) | 0.0657 (6) | |
N4 | 0.0000 | 0.6106 (3) | 0.2500 | 0.0898 (9) | |
H4 | 0.0000 | 0.5057 | 0.2500 | 0.108* | |
C8 | 0.18835 (10) | 0.2749 (3) | 0.37639 (10) | 0.0635 (6) | |
C6 | 0.10856 (13) | −0.0732 (3) | 0.42954 (10) | 0.0719 (6) | |
C17 | 0.27276 (12) | 0.4657 (3) | 0.27000 (11) | 0.0738 (6) | |
H17 | 0.2456 | 0.4070 | 0.2333 | 0.089* | |
C9 | 0.24330 (11) | 0.1713 (3) | 0.41344 (10) | 0.0715 (6) | |
C19 | 0.06028 (11) | 0.7026 (3) | 0.25289 (12) | 0.0802 (7) | |
H19A | 0.0749 | 0.7608 | 0.2958 | 0.096* | |
H19B | 0.0500 | 0.7825 | 0.2165 | 0.096* | |
C15 | 0.37336 (13) | 0.6229 (3) | 0.32006 (17) | 0.0930 (8) | |
H15 | 0.4144 | 0.6685 | 0.3174 | 0.112* | |
C13 | 0.29269 (12) | 0.5747 (3) | 0.38196 (12) | 0.0822 (7) | |
H13 | 0.2791 | 0.5876 | 0.4212 | 0.099* | |
C16 | 0.33348 (14) | 0.5339 (3) | 0.26650 (14) | 0.0840 (7) | |
H16 | 0.3476 | 0.5196 | 0.2277 | 0.101* | |
C5 | 0.04144 (14) | −0.0517 (3) | 0.42877 (12) | 0.0830 (7) | |
H5 | 0.0224 | 0.0524 | 0.4239 | 0.100* | |
C18 | 0.11649 (12) | 0.5955 (3) | 0.24635 (13) | 0.0913 (8) | |
H18A | 0.1048 | 0.5511 | 0.2007 | 0.110* | |
H18B | 0.1582 | 0.6592 | 0.2535 | 0.110* | |
C14 | 0.35261 (13) | 0.6447 (3) | 0.37766 (15) | 0.0951 (8) | |
H14 | 0.3792 | 0.7068 | 0.4136 | 0.114* | |
C10 | 0.31871 (12) | 0.1867 (4) | 0.42487 (13) | 0.0961 (8) | |
H10A | 0.3412 | 0.0905 | 0.4472 | 0.144* | |
H10B | 0.3354 | 0.2803 | 0.4528 | 0.144* | |
H10C | 0.3281 | 0.1991 | 0.3820 | 0.144* | |
C1 | 0.13730 (17) | −0.2275 (3) | 0.43868 (12) | 0.0930 (8) | |
H1 | 0.1832 | −0.2428 | 0.4409 | 0.112* | |
C2 | 0.0968 (2) | −0.3578 (4) | 0.44439 (14) | 0.1196 (12) | |
H2 | 0.1156 | −0.4621 | 0.4496 | 0.144* | |
C4 | 0.00213 (17) | −0.1842 (4) | 0.43516 (14) | 0.1080 (9) | |
H4A | −0.0435 | −0.1692 | 0.4344 | 0.130* | |
C3 | 0.0297 (3) | −0.3380 (5) | 0.44262 (15) | 0.1220 (12) | |
H3 | 0.0030 | −0.4276 | 0.4464 | 0.146* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0582 (10) | 0.0849 (11) | 0.0935 (11) | 0.0105 (8) | 0.0123 (8) | 0.0203 (9) |
N1 | 0.0691 (12) | 0.0775 (12) | 0.0639 (11) | 0.0186 (10) | 0.0165 (9) | 0.0105 (10) |
C7 | 0.0633 (14) | 0.0714 (13) | 0.0550 (11) | 0.0118 (11) | 0.0113 (10) | 0.0031 (11) |
C12 | 0.0527 (12) | 0.0789 (14) | 0.0630 (13) | 0.0104 (10) | 0.0106 (10) | 0.0064 (11) |
N2 | 0.0710 (13) | 0.1030 (15) | 0.0698 (12) | 0.0299 (11) | 0.0171 (9) | 0.0151 (11) |
N3 | 0.0534 (11) | 0.0994 (14) | 0.0904 (14) | 0.0020 (10) | 0.0098 (9) | 0.0312 (12) |
C11 | 0.0534 (12) | 0.0782 (14) | 0.0613 (12) | 0.0071 (11) | 0.0099 (9) | −0.0004 (11) |
N4 | 0.0586 (17) | 0.0646 (15) | 0.141 (3) | 0.000 | 0.0209 (16) | 0.000 |
C8 | 0.0578 (13) | 0.0768 (14) | 0.0529 (11) | 0.0114 (11) | 0.0109 (9) | 0.0040 (11) |
C6 | 0.0888 (17) | 0.0736 (15) | 0.0502 (11) | 0.0087 (13) | 0.0153 (11) | 0.0050 (11) |
C17 | 0.0676 (15) | 0.0905 (16) | 0.0623 (13) | 0.0129 (12) | 0.0171 (11) | 0.0103 (12) |
C9 | 0.0635 (14) | 0.0937 (16) | 0.0556 (12) | 0.0222 (13) | 0.0144 (10) | 0.0047 (12) |
C19 | 0.0640 (15) | 0.0849 (15) | 0.0790 (15) | −0.0046 (13) | 0.0001 (11) | 0.0105 (13) |
C15 | 0.0587 (15) | 0.0976 (19) | 0.118 (2) | 0.0060 (14) | 0.0185 (15) | 0.0314 (18) |
C13 | 0.0626 (14) | 0.1095 (18) | 0.0691 (14) | 0.0038 (14) | 0.0101 (11) | −0.0065 (14) |
C16 | 0.0793 (18) | 0.0950 (17) | 0.0848 (17) | 0.0241 (14) | 0.0348 (14) | 0.0294 (15) |
C5 | 0.0876 (18) | 0.0819 (16) | 0.0771 (15) | −0.0009 (14) | 0.0201 (13) | 0.0111 (13) |
C18 | 0.0667 (15) | 0.1080 (18) | 0.0938 (17) | 0.0109 (14) | 0.0146 (12) | 0.0381 (15) |
C14 | 0.0646 (17) | 0.110 (2) | 0.101 (2) | −0.0025 (14) | 0.0075 (14) | −0.0023 (16) |
C10 | 0.0650 (16) | 0.134 (2) | 0.0863 (16) | 0.0318 (15) | 0.0163 (12) | 0.0204 (16) |
C1 | 0.136 (2) | 0.0787 (17) | 0.0666 (14) | 0.0274 (17) | 0.0325 (15) | 0.0120 (13) |
C2 | 0.205 (4) | 0.074 (2) | 0.0774 (19) | 0.014 (2) | 0.037 (2) | 0.0158 (15) |
C4 | 0.119 (2) | 0.105 (2) | 0.0920 (19) | −0.020 (2) | 0.0188 (16) | 0.0229 (17) |
C3 | 0.182 (4) | 0.100 (3) | 0.0778 (18) | −0.037 (3) | 0.026 (2) | 0.0155 (17) |
O1—C7 | 1.243 (2) | C19—H19A | 0.9700 |
N1—C7 | 1.383 (3) | C19—H19B | 0.9700 |
N1—N2 | 1.398 (2) | C15—C16 | 1.374 (4) |
N1—C6 | 1.411 (3) | C15—C14 | 1.378 (4) |
C7—C8 | 1.429 (3) | C15—H15 | 0.9300 |
C12—C17 | 1.377 (3) | C13—C14 | 1.372 (3) |
C12—C13 | 1.391 (3) | C13—H13 | 0.9300 |
C12—C11 | 1.483 (3) | C16—H16 | 0.9300 |
N2—C9 | 1.310 (3) | C5—C4 | 1.377 (4) |
N3—C11 | 1.324 (3) | C5—H5 | 0.9300 |
N3—C18 | 1.448 (3) | C18—H18A | 0.9700 |
N3—H3A | 0.8600 | C18—H18B | 0.9700 |
C11—C8 | 1.392 (3) | C14—H14 | 0.9300 |
N4—C19 | 1.425 (3) | C10—H10A | 0.9600 |
N4—C19i | 1.425 (3) | C10—H10B | 0.9600 |
N4—H4 | 0.8600 | C10—H10C | 0.9600 |
C8—C9 | 1.435 (3) | C1—C2 | 1.375 (4) |
C6—C5 | 1.371 (3) | C1—H1 | 0.9300 |
C6—C1 | 1.384 (3) | C2—C3 | 1.362 (5) |
C17—C16 | 1.375 (3) | C2—H2 | 0.9300 |
C17—H17 | 0.9300 | C4—C3 | 1.370 (5) |
C9—C10 | 1.487 (3) | C4—H4A | 0.9300 |
C19—C18 | 1.477 (3) | C3—H3 | 0.9300 |
C7—N1—N2 | 111.73 (18) | C16—C15—H15 | 120.0 |
C7—N1—C6 | 127.98 (19) | C14—C15—H15 | 120.0 |
N2—N1—C6 | 118.64 (18) | C14—C13—C12 | 120.2 (2) |
O1—C7—N1 | 125.6 (2) | C14—C13—H13 | 119.9 |
O1—C7—C8 | 129.6 (2) | C12—C13—H13 | 119.9 |
N1—C7—C8 | 104.77 (18) | C15—C16—C17 | 120.3 (2) |
C17—C12—C13 | 119.5 (2) | C15—C16—H16 | 119.8 |
C17—C12—C11 | 120.9 (2) | C17—C16—H16 | 119.8 |
C13—C12—C11 | 119.66 (19) | C6—C5—C4 | 120.0 (3) |
C9—N2—N1 | 106.44 (17) | C6—C5—H5 | 120.0 |
C11—N3—C18 | 128.4 (2) | C4—C5—H5 | 120.0 |
C11—N3—H3A | 115.8 | N3—C18—C19 | 111.5 (2) |
C18—N3—H3A | 115.8 | N3—C18—H18A | 109.3 |
N3—C11—C8 | 119.03 (19) | C19—C18—H18A | 109.3 |
N3—C11—C12 | 118.1 (2) | N3—C18—H18B | 109.3 |
C8—C11—C12 | 122.84 (18) | C19—C18—H18B | 109.3 |
C19—N4—C19i | 116.1 (3) | H18A—C18—H18B | 108.0 |
C19—N4—H4 | 122.0 | C13—C14—C15 | 119.9 (3) |
C19i—N4—H4 | 122.0 | C13—C14—H14 | 120.1 |
C11—C8—C7 | 122.52 (18) | C15—C14—H14 | 120.1 |
C11—C8—C9 | 130.9 (2) | C9—C10—H10A | 109.5 |
C7—C8—C9 | 105.7 (2) | C9—C10—H10B | 109.5 |
C5—C6—C1 | 119.9 (2) | H10A—C10—H10B | 109.5 |
C5—C6—N1 | 120.5 (2) | C9—C10—H10C | 109.5 |
C1—C6—N1 | 119.6 (2) | H10A—C10—H10C | 109.5 |
C16—C17—C12 | 120.0 (2) | H10B—C10—H10C | 109.5 |
C16—C17—H17 | 120.0 | C2—C1—C6 | 118.8 (3) |
C12—C17—H17 | 120.0 | C2—C1—H1 | 120.6 |
N2—C9—C8 | 111.3 (2) | C6—C1—H1 | 120.6 |
N2—C9—C10 | 118.7 (2) | C3—C2—C1 | 121.6 (3) |
C8—C9—C10 | 130.0 (2) | C3—C2—H2 | 119.2 |
N4—C19—C18 | 111.1 (2) | C1—C2—H2 | 119.2 |
N4—C19—H19A | 109.4 | C3—C4—C5 | 120.4 (3) |
C18—C19—H19A | 109.4 | C3—C4—H4A | 119.8 |
N4—C19—H19B | 109.4 | C5—C4—H4A | 119.8 |
C18—C19—H19B | 109.4 | C2—C3—C4 | 119.1 (3) |
H19A—C19—H19B | 108.0 | C2—C3—H3 | 120.4 |
C16—C15—C14 | 120.1 (2) | C4—C3—H3 | 120.4 |
N2—N1—C7—O1 | 176.4 (2) | C11—C12—C17—C16 | −177.64 (19) |
C6—N1—C7—O1 | 11.4 (3) | N1—N2—C9—C8 | −1.4 (2) |
N2—N1—C7—C8 | −2.4 (2) | N1—N2—C9—C10 | −179.79 (19) |
C6—N1—C7—C8 | −167.39 (18) | C11—C8—C9—N2 | −168.8 (2) |
C7—N1—N2—C9 | 2.5 (2) | C7—C8—C9—N2 | 0.0 (2) |
C6—N1—N2—C9 | 169.01 (18) | C11—C8—C9—C10 | 9.3 (4) |
C18—N3—C11—C8 | −178.9 (2) | C7—C8—C9—C10 | 178.1 (2) |
C18—N3—C11—C12 | −0.7 (3) | C19i—N4—C19—C18 | −172.3 (2) |
C17—C12—C11—N3 | −69.2 (3) | C17—C12—C13—C14 | 0.1 (4) |
C13—C12—C11—N3 | 112.2 (2) | C11—C12—C13—C14 | 178.8 (2) |
C17—C12—C11—C8 | 108.9 (2) | C14—C15—C16—C17 | −0.1 (4) |
C13—C12—C11—C8 | −69.7 (3) | C12—C17—C16—C15 | −1.0 (3) |
N3—C11—C8—C7 | −0.3 (3) | C1—C6—C5—C4 | −1.8 (3) |
C12—C11—C8—C7 | −178.43 (19) | N1—C6—C5—C4 | 177.1 (2) |
N3—C11—C8—C9 | 166.9 (2) | C11—N3—C18—C19 | −135.6 (3) |
C12—C11—C8—C9 | −11.2 (3) | N4—C19—C18—N3 | −52.7 (3) |
O1—C7—C8—C11 | −7.3 (4) | C12—C13—C14—C15 | −1.3 (4) |
N1—C7—C8—C11 | 171.45 (18) | C16—C15—C14—C13 | 1.3 (4) |
O1—C7—C8—C9 | −177.3 (2) | C5—C6—C1—C2 | 2.3 (3) |
N1—C7—C8—C9 | 1.4 (2) | N1—C6—C1—C2 | −176.6 (2) |
C7—N1—C6—C5 | −32.3 (3) | C6—C1—C2—C3 | −1.3 (4) |
N2—N1—C6—C5 | 163.56 (19) | C6—C5—C4—C3 | 0.3 (4) |
C7—N1—C6—C1 | 146.5 (2) | C1—C2—C3—C4 | −0.2 (5) |
N2—N1—C6—C1 | −17.5 (3) | C5—C4—C3—C2 | 0.7 (5) |
C13—C12—C17—C16 | 1.0 (3) |
Symmetry code: (i) −x, y, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C38H37N7O2 |
Mr | 623.75 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 296 |
a, b, c (Å) | 20.3219 (8), 8.1990 (2), 20.5468 (6) |
β (°) | 106.748 (2) |
V (Å3) | 3278.27 (18) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.23 × 0.21 × 0.15 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2007) |
Tmin, Tmax | 0.982, 0.988 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8269, 3765, 1886 |
Rint | 0.021 |
(sin θ/λ)max (Å−1) | 0.655 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.054, 0.179, 1.01 |
No. of reflections | 3765 |
No. of parameters | 214 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.34, −0.29 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
Acknowledgements
The authors are grateful to the National Natural Science Foundation of China for financial support (grant No. 21001040).
References
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The Schiff bases derivatives of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and their metal complexes have been widely studied because of their high biological and pharmaceutical activities (Yang et al., 2000; Wang et al., 2005). For our interest in coordination chemistry, the crystal structure of the title compound was determined by X-ray diffraction analysis.
The asymmetric unit of the title compound contains a half of the molecule situated on a twofold rotational axis. In the independent part of the molecule, one amino group is invloved in intramolecular N—H···O hydrogen bond (Table 1), and two phenyl rings are twisted from the plane of pyrazolone ring at 26.69 (10)° and 79.64 (8)°, respectively. The crystal packing exhibits no classical intermolecular contacts.