organic compounds
2-{2-[2-(1,3-Dioxoisoindol-2-yl)ethoxy]ethyl}isoindole-1,3-dione
aInstitute of Bioorganic Chemistry, Academy of Sciences of Uzbekistan, Mirzo Ulugbek Str. 83, Tashkent 100125, Uzbekistan, bThe National University of Uzbekistan named after Mirzo Ulugbek, Faculty of Chemistry, University Str. 6, Tashkent 100779, Uzbekistan, cTashkent Institute of Irrigation and Melioration, Qori-Niyoziy Str. 39, Tashkent 100000, Uzbekistan, and dS. Yunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of Uzbekistan, Mirzo Ulugbek Str. 77, Tashkent 100170, Uzbekistan
*Correspondence e-mail: zokir_k@mail.ru
In the molecule of the title compound, C20H16N2O5, the phthalimide fragments are almost planar, with r.m.s. deviations of 0.018 and 0.020 Å, and make a dihedral angle of 53.64 (3)°. The molecular and crystal structures are stabilized by a weak intermolecular C—H⋯O, C—H⋯π and C=O⋯π [2.883 (1) Å] interactions and aromatic π–π stacking interactions with a centroid–centroid distance of 3.6189 (7) Å.
Related literature
For related structures, see: Valle et al. (1986); Sheng et al. (2007). For the preparation, see: Yatsimirskii et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Oxford Diffraction, 2009); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536811018496/gw2102sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811018496/gw2102Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811018496/gw2102Isup3.cml
The title compound is received by the slightly modified technique (Yatsimirskii et al.,1987). 24 g (0.12 mole) potassium phthalimide and 8 ml (0.05 mole) β,β'-dichloroethyl ether were taken in a three-necked round-battomed flask supplied with a reflux condenser and a mechanical stirrer. Reaction is carried out at 463-473 K within 2.5 hours by stirring. After corresponding chemical treatments (Yatsimirskii et al.,1987) reaction product was recrystallized from 1:1 mixture of ethanol and chloroform. 13.99 g (56 %) title compound , with m.p. of 421-423 K was received.
Carbon-bound H atoms were positioned geometrically and treated as riding on their C atoms, with C—H distances of 0.93 Å (aromatic) and 0.97 Å (CH2) and were refined with Uiso(H)=1.2Ueq(C).
Data collection: CrysAlis PRO (Oxford Diffraction, 2009); cell
CrysAlis PRO (Oxford Diffraction, 2009); data reduction: CrysAlis PRO (Oxford Diffraction, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. Molecular structure of the title compound with 50% probability displacement ellipsoids for non-H atoms. | |
Fig. 2. View of the crystal structure along the b-axis showing a C=O···π and π···π stacking interactions (dashed lines). |
C20H16N2O5 | F(000) = 760 |
Mr = 364.35 | Dx = 1.391 Mg m−3 |
Monoclinic, P21/n | Cu Kα radiation, λ = 1.54180 Å |
Hall symbol: -P 2yn | Cell parameters from 9302 reflections |
a = 10.8928 (1) Å | θ = 3.3–75.5° |
b = 11.9656 (1) Å | µ = 0.85 mm−1 |
c = 14.3572 (2) Å | T = 293 K |
β = 111.633 (1)° | Prism, colourless |
V = 1739.49 (3) Å3 | 0.40 × 0.30 × 0.20 mm |
Z = 4 |
Oxford Diffraction Xcalibur Ruby diffractometer | 3575 independent reflections |
Radiation source: Enhance (Cu) X-ray Source | 3075 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.025 |
Detector resolution: 10.2576 pixels mm-1 | θmax = 75.6°, θmin = 4.4° |
ω scans | h = −13→10 |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2009) | k = −14→15 |
Tmin = 0.333, Tmax = 1.000 | l = −14→17 |
14673 measured reflections |
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)] = 0.038 | H-atom parameters constrained |
wR(F2) = 0.115 | w = 1/[σ2(Fo2) + (0.0682P)2 + 0.1804P] where P = (Fo2 + 2Fc2)/3 |
S = 1.07 | (Δ/σ)max < 0.001 |
3575 reflections | Δρmax = 0.21 e Å−3 |
245 parameters | Δρmin = −0.14 e Å−3 |
0 restraints | Extinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0094 (6) |
C20H16N2O5 | V = 1739.49 (3) Å3 |
Mr = 364.35 | Z = 4 |
Monoclinic, P21/n | Cu Kα radiation |
a = 10.8928 (1) Å | µ = 0.85 mm−1 |
b = 11.9656 (1) Å | T = 293 K |
c = 14.3572 (2) Å | 0.40 × 0.30 × 0.20 mm |
β = 111.633 (1)° |
Oxford Diffraction Xcalibur Ruby diffractometer | 3575 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2009) | 3075 reflections with I > 2σ(I) |
Tmin = 0.333, Tmax = 1.000 | Rint = 0.025 |
14673 measured reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.21 e Å−3 |
3575 reflections | Δρmin = −0.14 e Å−3 |
245 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | 0.20673 (10) | 0.08438 (9) | 0.31107 (8) | 0.0482 (3) | |
N2 | 0.37536 (10) | −0.01311 (9) | 0.06449 (8) | 0.0456 (3) | |
O1 | 0.14477 (11) | 0.03279 (11) | 0.44214 (8) | 0.0705 (3) | |
O2 | 0.32443 (10) | 0.15162 (9) | 0.21829 (7) | 0.0564 (3) | |
O3 | 0.19329 (8) | −0.09719 (7) | 0.16698 (6) | 0.0470 (2) | |
O4 | 0.26607 (11) | 0.11689 (10) | −0.05545 (9) | 0.0714 (3) | |
O5 | 0.52801 (11) | −0.10263 (11) | 0.19907 (8) | 0.0726 (3) | |
C1 | 0.22559 (13) | 0.07069 (11) | 0.41171 (10) | 0.0491 (3) | |
C2 | 0.36170 (13) | 0.11145 (10) | 0.46882 (9) | 0.0445 (3) | |
C3 | 0.41737 (12) | 0.14479 (10) | 0.40088 (9) | 0.0423 (3) | |
C4 | 0.31715 (12) | 0.12978 (10) | 0.29806 (9) | 0.0444 (3) | |
C5 | 0.43090 (15) | 0.11709 (11) | 0.57083 (10) | 0.0524 (3) | |
H5A | 0.3929 | 0.0948 | 0.6162 | 0.063* | |
C6 | 0.55940 (14) | 0.15730 (12) | 0.60309 (10) | 0.0554 (3) | |
H6A | 0.6084 | 0.1625 | 0.6714 | 0.067* | |
C7 | 0.61590 (14) | 0.18991 (11) | 0.53518 (11) | 0.0541 (3) | |
H7A | 0.7024 | 0.2161 | 0.5588 | 0.065* | |
C8 | 0.54558 (13) | 0.18413 (10) | 0.43237 (10) | 0.0485 (3) | |
H8A | 0.5833 | 0.2059 | 0.3867 | 0.058* | |
C9 | 0.08711 (13) | 0.05067 (13) | 0.22883 (11) | 0.0547 (3) | |
H9A | 0.0767 | 0.0963 | 0.1706 | 0.066* | |
H9B | 0.0114 | 0.0638 | 0.2476 | 0.066* | |
C10 | 0.09011 (13) | −0.07152 (12) | 0.20170 (10) | 0.0514 (3) | |
H10A | 0.1008 | −0.1169 | 0.2601 | 0.062* | |
H10B | 0.0061 | −0.0910 | 0.1500 | 0.062* | |
C11 | 0.15869 (12) | −0.07463 (12) | 0.06348 (9) | 0.0483 (3) | |
H11A | 0.1335 | 0.0032 | 0.0500 | 0.058* | |
H11B | 0.0839 | −0.1204 | 0.0246 | 0.058* | |
C12 | 0.27467 (14) | −0.09957 (12) | 0.03325 (10) | 0.0521 (3) | |
H12A | 0.3137 | −0.1702 | 0.0627 | 0.062* | |
H12B | 0.2435 | −0.1074 | −0.0390 | 0.062* | |
C13 | 0.35959 (14) | 0.09081 (11) | 0.01785 (10) | 0.0511 (3) | |
C14 | 0.47835 (15) | 0.15636 (13) | 0.07673 (12) | 0.0603 (4) | |
C15 | 0.55826 (14) | 0.08926 (15) | 0.15356 (11) | 0.0613 (4) | |
C16 | 0.49218 (13) | −0.02092 (13) | 0.14666 (10) | 0.0514 (3) | |
C17 | 0.5109 (2) | 0.26603 (16) | 0.06645 (19) | 0.0904 (7) | |
H17A | 0.4569 | 0.3112 | 0.0149 | 0.108* | |
C18 | 0.6273 (3) | 0.3050 (2) | 0.1364 (3) | 0.1217 (11) | |
H18A | 0.6528 | 0.3782 | 0.1312 | 0.146* | |
C19 | 0.7070 (3) | 0.2397 (3) | 0.2133 (2) | 0.1250 (12) | |
H19A | 0.7838 | 0.2700 | 0.2597 | 0.150* | |
C20 | 0.67502 (18) | 0.1286 (2) | 0.22309 (15) | 0.0915 (7) | |
H20A | 0.7298 | 0.0833 | 0.2741 | 0.110* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0457 (5) | 0.0535 (6) | 0.0441 (6) | −0.0019 (4) | 0.0151 (4) | −0.0071 (5) |
N2 | 0.0453 (5) | 0.0485 (6) | 0.0437 (5) | 0.0008 (4) | 0.0174 (4) | −0.0006 (4) |
O1 | 0.0660 (7) | 0.0886 (8) | 0.0673 (7) | −0.0175 (6) | 0.0368 (6) | −0.0077 (6) |
O2 | 0.0646 (6) | 0.0640 (6) | 0.0431 (5) | −0.0003 (5) | 0.0229 (4) | −0.0004 (4) |
O3 | 0.0425 (4) | 0.0523 (5) | 0.0423 (5) | −0.0002 (4) | 0.0109 (4) | −0.0008 (4) |
O4 | 0.0706 (7) | 0.0761 (7) | 0.0661 (7) | 0.0161 (6) | 0.0235 (6) | 0.0212 (6) |
O5 | 0.0626 (6) | 0.0927 (8) | 0.0602 (6) | 0.0190 (6) | 0.0200 (5) | 0.0223 (6) |
C1 | 0.0514 (7) | 0.0497 (7) | 0.0498 (7) | −0.0015 (5) | 0.0230 (6) | −0.0062 (5) |
C2 | 0.0505 (6) | 0.0402 (6) | 0.0429 (6) | 0.0016 (5) | 0.0175 (5) | −0.0023 (5) |
C3 | 0.0477 (6) | 0.0364 (5) | 0.0423 (6) | 0.0028 (5) | 0.0161 (5) | −0.0017 (4) |
C4 | 0.0481 (6) | 0.0423 (6) | 0.0439 (6) | 0.0032 (5) | 0.0183 (5) | −0.0038 (5) |
C5 | 0.0642 (8) | 0.0498 (7) | 0.0421 (7) | 0.0009 (6) | 0.0183 (6) | 0.0007 (5) |
C6 | 0.0626 (8) | 0.0480 (7) | 0.0431 (7) | 0.0028 (6) | 0.0046 (6) | −0.0008 (5) |
C7 | 0.0482 (7) | 0.0448 (7) | 0.0592 (8) | −0.0001 (5) | 0.0080 (6) | −0.0011 (6) |
C8 | 0.0492 (6) | 0.0418 (6) | 0.0551 (7) | 0.0002 (5) | 0.0200 (6) | −0.0002 (5) |
C9 | 0.0416 (6) | 0.0640 (8) | 0.0531 (7) | 0.0026 (6) | 0.0111 (6) | −0.0078 (6) |
C10 | 0.0432 (6) | 0.0584 (8) | 0.0508 (7) | −0.0081 (5) | 0.0155 (5) | −0.0058 (6) |
C11 | 0.0424 (6) | 0.0540 (7) | 0.0423 (6) | −0.0051 (5) | 0.0085 (5) | −0.0002 (5) |
C12 | 0.0562 (7) | 0.0503 (7) | 0.0493 (7) | −0.0044 (6) | 0.0189 (6) | −0.0074 (5) |
C13 | 0.0561 (7) | 0.0511 (7) | 0.0542 (7) | 0.0052 (6) | 0.0299 (6) | 0.0029 (6) |
C14 | 0.0673 (9) | 0.0585 (8) | 0.0724 (9) | −0.0078 (7) | 0.0461 (8) | −0.0103 (7) |
C15 | 0.0520 (7) | 0.0842 (10) | 0.0571 (8) | −0.0144 (7) | 0.0312 (7) | −0.0201 (7) |
C16 | 0.0451 (6) | 0.0700 (9) | 0.0421 (6) | 0.0044 (6) | 0.0194 (5) | −0.0004 (6) |
C17 | 0.1166 (16) | 0.0630 (10) | 0.1294 (17) | −0.0240 (10) | 0.0896 (15) | −0.0194 (10) |
C18 | 0.152 (3) | 0.0986 (18) | 0.165 (3) | −0.0711 (18) | 0.118 (2) | −0.0610 (18) |
C19 | 0.1109 (19) | 0.170 (3) | 0.124 (2) | −0.091 (2) | 0.0779 (17) | −0.086 (2) |
C20 | 0.0641 (10) | 0.144 (2) | 0.0739 (11) | −0.0364 (11) | 0.0341 (9) | −0.0386 (12) |
N1—C1 | 1.3922 (16) | C8—H8A | 0.9300 |
N1—C4 | 1.3937 (17) | C9—C10 | 1.517 (2) |
N1—C9 | 1.4561 (16) | C9—H9A | 0.9700 |
N2—C16 | 1.3830 (16) | C9—H9B | 0.9700 |
N2—C13 | 1.3926 (17) | C10—H10A | 0.9700 |
N2—C12 | 1.4531 (17) | C10—H10B | 0.9700 |
O1—C1 | 1.2062 (16) | C11—C12 | 1.5092 (19) |
O2—C4 | 1.2055 (15) | C11—H11A | 0.9700 |
O3—C11 | 1.4178 (15) | C11—H11B | 0.9700 |
O3—C10 | 1.4209 (16) | C12—H12A | 0.9700 |
O4—C13 | 1.2051 (17) | C12—H12B | 0.9700 |
O5—C16 | 1.2075 (18) | C13—C14 | 1.482 (2) |
C1—C2 | 1.4873 (18) | C14—C17 | 1.381 (2) |
C2—C5 | 1.3798 (18) | C14—C15 | 1.382 (2) |
C2—C3 | 1.3836 (17) | C15—C20 | 1.378 (2) |
C3—C8 | 1.3823 (18) | C15—C16 | 1.488 (2) |
C3—C4 | 1.4884 (17) | C17—C18 | 1.376 (4) |
C5—C6 | 1.388 (2) | C17—H17A | 0.9300 |
C5—H5A | 0.9300 | C18—C19 | 1.369 (4) |
C6—C7 | 1.387 (2) | C18—H18A | 0.9300 |
C6—H6A | 0.9300 | C19—C20 | 1.395 (4) |
C7—C8 | 1.3917 (19) | C19—H19A | 0.9300 |
C7—H7A | 0.9300 | C20—H20A | 0.9300 |
C1—N1—C4 | 112.37 (10) | O3—C10—H10B | 108.9 |
C1—N1—C9 | 123.68 (11) | C9—C10—H10B | 108.9 |
C4—N1—C9 | 123.90 (11) | H10A—C10—H10B | 107.8 |
C16—N2—C13 | 112.47 (11) | O3—C11—C12 | 109.66 (10) |
C16—N2—C12 | 124.58 (11) | O3—C11—H11A | 109.7 |
C13—N2—C12 | 122.82 (11) | C12—C11—H11A | 109.7 |
C11—O3—C10 | 112.80 (10) | O3—C11—H11B | 109.7 |
O1—C1—N1 | 124.89 (13) | C12—C11—H11B | 109.7 |
O1—C1—C2 | 129.50 (13) | H11A—C11—H11B | 108.2 |
N1—C1—C2 | 105.61 (11) | N2—C12—C11 | 112.77 (11) |
C5—C2—C3 | 121.62 (12) | N2—C12—H12A | 109.0 |
C5—C2—C1 | 130.14 (12) | C11—C12—H12A | 109.0 |
C3—C2—C1 | 108.24 (11) | N2—C12—H12B | 109.0 |
C8—C3—C2 | 121.35 (12) | C11—C12—H12B | 109.0 |
C8—C3—C4 | 130.44 (12) | H12A—C12—H12B | 107.8 |
C2—C3—C4 | 108.21 (11) | O4—C13—N2 | 124.47 (13) |
O2—C4—N1 | 125.04 (12) | O4—C13—C14 | 129.80 (14) |
O2—C4—C3 | 129.43 (12) | N2—C13—C14 | 105.74 (12) |
N1—C4—C3 | 105.53 (10) | C17—C14—C15 | 121.74 (18) |
C2—C5—C6 | 117.40 (13) | C17—C14—C13 | 130.25 (18) |
C2—C5—H5A | 121.3 | C15—C14—C13 | 107.95 (13) |
C6—C5—H5A | 121.3 | C20—C15—C14 | 121.39 (18) |
C7—C6—C5 | 121.13 (12) | C20—C15—C16 | 130.21 (18) |
C7—C6—H6A | 119.4 | C14—C15—C16 | 108.34 (13) |
C5—C6—H6A | 119.4 | O5—C16—N2 | 124.80 (14) |
C6—C7—C8 | 121.21 (13) | O5—C16—C15 | 129.70 (14) |
C6—C7—H7A | 119.4 | N2—C16—C15 | 105.51 (12) |
C8—C7—H7A | 119.4 | C18—C17—C14 | 116.6 (2) |
C3—C8—C7 | 117.29 (12) | C18—C17—H17A | 121.7 |
C3—C8—H8A | 121.4 | C14—C17—H17A | 121.7 |
C7—C8—H8A | 121.4 | C19—C18—C17 | 122.3 (2) |
N1—C9—C10 | 112.19 (11) | C19—C18—H18A | 118.8 |
N1—C9—H9A | 109.2 | C17—C18—H18A | 118.8 |
C10—C9—H9A | 109.2 | C18—C19—C20 | 121.2 (2) |
N1—C9—H9B | 109.2 | C18—C19—H19A | 119.4 |
C10—C9—H9B | 109.2 | C20—C19—H19A | 119.4 |
H9A—C9—H9B | 107.9 | C15—C20—C19 | 116.8 (2) |
O3—C10—C9 | 113.15 (11) | C15—C20—H20A | 121.6 |
O3—C10—H10A | 108.9 | C19—C20—H20A | 121.6 |
C9—C10—H10A | 108.9 |
Cg3 and Cg4 are the centroids of the C2/C3/C5–C8 and C14/C15/C17–C20 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5A···O5i | 0.93 | 2.47 | 3.171 (2) | 132 |
C19—H19A···O5ii | 0.93 | 2.45 | 3.286 (4) | 150 |
C11—H11B···Cg3iii | 0.97 | 2.84 | 3.624 (2) | 139 |
C12—H12B···Cg4iv | 0.97 | 2.94 | 3.567 (2) | 123 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+3/2, y+1/2, −z+1/2; (iii) −x+1/2, y−1/2, −z+1/2; (iv) −x+1, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | C20H16N2O5 |
Mr | 364.35 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 10.8928 (1), 11.9656 (1), 14.3572 (2) |
β (°) | 111.633 (1) |
V (Å3) | 1739.49 (3) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 0.85 |
Crystal size (mm) | 0.40 × 0.30 × 0.20 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur Ruby diffractometer |
Absorption correction | Multi-scan (CrysAlis PRO; Oxford Diffraction, 2009) |
Tmin, Tmax | 0.333, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14673, 3575, 3075 |
Rint | 0.025 |
(sin θ/λ)max (Å−1) | 0.628 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.115, 1.07 |
No. of reflections | 3575 |
No. of parameters | 245 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.21, −0.14 |
Computer programs: CrysAlis PRO (Oxford Diffraction, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP in SHELXTL (Sheldrick, 2008).
Cg3 and Cg4 are the centroids of the C2/C3/C5–C8 and C14/C15/C17–C20 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5A···O5i | 0.93 | 2.47 | 3.171 (2) | 132 |
C19—H19A···O5ii | 0.93 | 2.45 | 3.286 (4) | 150 |
C11—H11B···Cg3iii | 0.97 | 2.84 | 3.624 (2) | 139 |
C12—H12B···Cg4iv | 0.97 | 2.94 | 3.567 (2) | 123 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+3/2, y+1/2, −z+1/2; (iii) −x+1/2, y−1/2, −z+1/2; (iv) −x+1, −y, −z. |
Acknowledgements
This work was supported by a grant for fundamental research from the Center of Science and Technology, Uzbekistan (No. FA-F3-T-141).
References
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The asymmetric unit contains one molecule of the title compound (Figure 1). In the molecule phthalimide fragments are planar, with r.m.s. deviations of 0.018Å and 0.020Å, respectively. The angle between planes is 53.64 (3)°. The observed structure is stabilized by weak C—H···O and C-H···π(ring) hydrogen bonds (Table 1), as well as C=O···π(ring) (C4=O2···Cg2 distance is 2.883 (1), where Cg2 is N2C13C14C15C16 ring centroid) and aromatic π···π stacking interactions. A centrosymmetric π···π stacking interactions are observed between maleimide rings (Cg2···Cg2i distance is 3.4805 (9) Å, where i = 1-x, -y, -z) and benzene rings (Cg3···Cg3ii distance 3.6189 (7)Å, where Cg3 is C2C3C5C6C7C8 ring centroid, ii = 1-x, -y, 1-z) (Figure 2).