supplementary materials


hb6540 scheme

Acta Cryst. (2012). E68, o37    [ doi:10.1107/S1600536811051816 ]

1-Benzyl-4-chloroindoline-2,3-dione

D. C. Wang, B. R. Leng, G. B. Wang, P. Wei and P. K. Ou-yang

Abstract top

There are two independent molecules in the asymmetric unit of the title compound, C15H10ClNO2, which differ in the dihedral angles between the mean planes of the phenyl ring and the 4-chloroindoline-2,3-dione ring system [59.48 (9) and 79.0 (1)°]. In the crystal, molecules are linked through C-H...O hydrogen bonds, forming polymeric chains in [100].

Comment top

As a part of our studies into the synthesis and structures of isatin derivatives (Liu et al., 2011), the title compound (I) was synthesized (Bouhfid et al.2005) and its structure is now reported.

The title compound crystallized with two independent molecules (A & B) in the asymmetric unit (Fig. 1). They differ significantly in conformation, as may be seen from the dihedral angle in the mean planes of the benzene and 4-chloroindoline-2,3-dione. For molecule A,the dihedral angle between the mean planes of the benzene and 4-chloroindoline-2,3-dione is 59.481 (88)°,while the corresponding dihedral angle is 79.028 (114)° in molecule B. The bond lengths (Allen et al., 1987) and bond angles are otherwise within normal ranges.

In the crystal structure, intermolecular and intramolecular C—H···O hydrogen bonding interactions (Table 1) link the molecules into a polymeric chain extended along the a axis (Fig. 2).

Related literature top

For the preparation, see: Bouhfid et al. (2005). For a related structure and background to isatin derivatives, see: Liu et al. (2011). For reference bond-length data, see: Allen et al. (1987).

Experimental top

4-chloroisatin (1.81 g, 0.01 mol) was reacted with benzyl bromide (0.02 mol) in the presence of K2CO3 (2.76 g, 0.02 mol) and tetrabutylammonium bromide (0.32 g, 0.001 mol) in DMF (60 ml). After 12 h stirring at rt, the precipitate was removed by filtration and purified by recrystallization from ethanol (m.p. 165.8–166.5 °C; yield 70%). Yellow blocks of the title compound were obtained by slow evaporation of an ethanol solution at room temperature.

Refinement top

All H atoms were placed geometrically (C—H = 0.93–0.96 Å) and refined as riding with Uiso(H) = 1.2Ueq(carrier) or 1.5Ueq(methyl carrier).

Computing details top

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell refinement: CAD-4 EXPRESS (Enraf–Nonius, 1994); data reduction: XCAD4 (Harms & Wocadlo,1995); 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: PLATON (Spek, 2009).

Figures top
[Figure 1] Fig. 1. The molecular structure of (I), showing displacement ellipsoids at the 30% probability level.
[Figure 2] Fig. 2. A packing diagram of (I). The intermolecular hydrogen bonds are shown as dashed lines.
1-Benzyl-4-chloroindoline-2,3-dione top
Crystal data top
C15H10ClNO2F(000) = 2240
Mr = 271.69Dx = 1.426 Mg m3
Orthorhombic, PbcaMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2abCell parameters from 25 reflections
a = 22.864 (5) Åθ = 9–13°
b = 16.600 (3) ŵ = 0.30 mm1
c = 13.335 (3) ÅT = 293 K
V = 5061.2 (18) Å3Block, yellow
Z = 160.30 × 0.20 × 0.10 mm
Data collection top
Enraf–Nonius CAD-4
diffractometer
1929 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.000
graphiteθmax = 25.4°, θmin = 1.8°
ω/2θ scansh = 027
Absorption correction: ψ scan
(North et al., 1968)
k = 020
Tmin = 0.916, Tmax = 0.971l = 016
4623 measured reflections3 standard reflections every 200 reflections
4623 independent reflections intensity decay: 1%
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.064Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.117H-atom parameters constrained
S = 1.00 w = 1/[σ2(Fo2) + (0.032P)2]
where P = (Fo2 + 2Fc2)/3
4623 reflections(Δ/σ)max = 0.001
343 parametersΔρmax = 0.18 e Å3
0 restraintsΔρmin = 0.20 e Å3
Crystal data top
C15H10ClNO2V = 5061.2 (18) Å3
Mr = 271.69Z = 16
Orthorhombic, PbcaMo Kα radiation
a = 22.864 (5) ŵ = 0.30 mm1
b = 16.600 (3) ÅT = 293 K
c = 13.335 (3) Å0.30 × 0.20 × 0.10 mm
Data collection top
Enraf–Nonius CAD-4
diffractometer
1929 reflections with I > 2σ(I)
Absorption correction: ψ scan
(North et al., 1968)
Rint = 0.000
Tmin = 0.916, Tmax = 0.971θmax = 25.4°
4623 measured reflections3 standard reflections every 200 reflections
4623 independent reflections intensity decay: 1%
Refinement top
R[F2 > 2σ(F2)] = 0.064H-atom parameters constrained
wR(F2) = 0.117Δρmax = 0.18 e Å3
S = 1.00Δρmin = 0.20 e Å3
4623 reflectionsAbsolute structure: ?
343 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Cl10.61720 (4)0.52555 (7)0.54905 (10)0.0902 (4)
C10.73389 (14)0.5069 (2)0.5352 (3)0.0438 (9)
N10.83104 (11)0.47219 (17)0.5229 (2)0.0506 (8)
O10.82562 (10)0.33371 (14)0.5350 (2)0.0681 (8)
O20.70097 (10)0.36781 (14)0.5538 (2)0.0628 (8)
C20.68738 (15)0.5601 (2)0.5384 (3)0.0522 (10)
C30.69793 (18)0.6420 (2)0.5343 (3)0.0644 (12)
H3A0.66710.67850.53580.077*
C40.7549 (2)0.6687 (2)0.5278 (3)0.0649 (12)
H4A0.76170.72390.52690.078*
C50.80188 (17)0.6178 (2)0.5228 (3)0.0540 (11)
H5A0.83980.63750.51730.065*
C60.79077 (15)0.5362 (2)0.5261 (3)0.0452 (9)
C70.80405 (15)0.3997 (2)0.5335 (3)0.0490 (10)
C80.73753 (16)0.4189 (2)0.5423 (3)0.0489 (10)
C90.89331 (15)0.4816 (2)0.5095 (3)0.0576 (11)
H9A0.90020.52070.45670.069*
H9B0.90960.43060.48760.069*
C100.92469 (15)0.5083 (2)0.6021 (3)0.0525 (10)
C110.96343 (16)0.5718 (2)0.5974 (3)0.0721 (13)
H11A0.96930.59900.53730.086*
C120.9933 (2)0.5946 (3)0.6822 (5)0.0975 (17)
H12A1.01960.63730.67900.117*
C130.9849 (2)0.5558 (4)0.7704 (5)0.1020 (19)
H13A1.00540.57170.82730.122*
C140.9457 (2)0.4926 (3)0.7757 (4)0.0911 (15)
H14A0.93980.46570.83600.109*
C150.91552 (17)0.4698 (2)0.6912 (3)0.0674 (12)
H15A0.88860.42790.69470.081*
O30.78599 (12)0.39116 (16)0.7763 (2)0.0807 (9)
O40.66106 (12)0.42670 (16)0.7850 (2)0.0824 (9)
N20.65413 (13)0.28816 (19)0.7866 (2)0.0596 (9)
Cl20.86828 (5)0.23348 (8)0.78394 (10)0.1009 (5)
C160.69392 (17)0.2242 (2)0.7838 (3)0.0512 (10)
C170.6827 (2)0.1434 (2)0.7823 (3)0.0699 (12)
H17A0.64440.12450.78110.084*
C180.7288 (2)0.0906 (2)0.7827 (3)0.0789 (14)
H18A0.72140.03550.78170.095*
C190.7861 (2)0.1170 (3)0.7845 (3)0.0767 (14)
H19A0.81670.08020.78590.092*
C200.79739 (17)0.1997 (3)0.7842 (3)0.0633 (11)
C210.75154 (15)0.2526 (2)0.7840 (3)0.0506 (10)
C220.74875 (18)0.3404 (2)0.7816 (3)0.0551 (11)
C230.68310 (19)0.3602 (3)0.7847 (3)0.0618 (11)
C240.59128 (16)0.2818 (3)0.7776 (3)0.0758 (13)
H24A0.58270.24320.72520.091*
H24B0.57640.33360.75560.091*
C250.55801 (16)0.2574 (2)0.8702 (3)0.0587 (11)
C260.58256 (16)0.2129 (2)0.9452 (3)0.0647 (12)
H26A0.62230.20090.94370.078*
C270.5485 (2)0.1861 (3)1.0228 (3)0.0774 (13)
H27A0.56530.15451.07270.093*
C280.4906 (2)0.2049 (3)1.0284 (4)0.0900 (16)
H28A0.46770.18641.08130.108*
C290.46671 (18)0.2517 (3)0.9539 (5)0.0910 (16)
H29A0.42750.26620.95730.109*
C300.49984 (18)0.2771 (2)0.8754 (3)0.0736 (13)
H30A0.48300.30790.82490.088*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Cl10.0555 (7)0.0927 (9)0.1224 (10)0.0131 (6)0.0004 (7)0.0070 (8)
C10.046 (2)0.043 (2)0.042 (2)0.0025 (19)0.001 (2)0.0029 (19)
N10.0396 (17)0.0442 (18)0.068 (2)0.0015 (15)0.0006 (17)0.0029 (18)
O10.0652 (17)0.0403 (16)0.099 (2)0.0090 (14)0.0063 (16)0.0039 (16)
O20.0551 (16)0.0472 (16)0.086 (2)0.0117 (14)0.0087 (16)0.0008 (15)
C20.059 (2)0.048 (2)0.050 (3)0.007 (2)0.001 (2)0.002 (2)
C30.077 (3)0.052 (3)0.064 (3)0.018 (2)0.000 (3)0.001 (2)
C40.096 (3)0.048 (3)0.051 (3)0.002 (3)0.001 (3)0.002 (2)
C50.066 (3)0.040 (2)0.056 (3)0.008 (2)0.007 (2)0.002 (2)
C60.050 (2)0.043 (2)0.043 (2)0.0059 (19)0.0061 (19)0.001 (2)
C70.049 (2)0.043 (2)0.056 (3)0.001 (2)0.009 (2)0.002 (2)
C80.050 (2)0.046 (3)0.050 (3)0.007 (2)0.010 (2)0.005 (2)
C90.055 (2)0.054 (3)0.063 (3)0.002 (2)0.010 (2)0.000 (2)
C100.045 (2)0.055 (3)0.058 (3)0.0001 (19)0.007 (2)0.001 (2)
C110.056 (3)0.071 (3)0.089 (4)0.019 (2)0.008 (3)0.004 (3)
C120.066 (3)0.097 (4)0.129 (5)0.017 (3)0.007 (4)0.031 (4)
C130.081 (4)0.126 (5)0.099 (5)0.016 (4)0.041 (4)0.041 (4)
C140.100 (4)0.100 (4)0.073 (4)0.022 (3)0.012 (3)0.006 (3)
C150.070 (3)0.056 (3)0.076 (3)0.004 (2)0.006 (3)0.002 (3)
O30.090 (2)0.0580 (18)0.095 (2)0.0212 (17)0.0114 (19)0.0033 (18)
O40.107 (2)0.0579 (18)0.082 (2)0.0191 (17)0.0051 (19)0.0061 (18)
N20.057 (2)0.059 (2)0.063 (2)0.0011 (18)0.003 (2)0.003 (2)
Cl20.0643 (7)0.1260 (11)0.1124 (11)0.0158 (8)0.0084 (8)0.0130 (9)
C160.068 (3)0.042 (2)0.044 (2)0.002 (2)0.000 (2)0.001 (2)
C170.097 (3)0.053 (3)0.060 (3)0.018 (3)0.010 (3)0.008 (3)
C180.137 (5)0.039 (3)0.060 (3)0.003 (3)0.008 (3)0.000 (2)
C190.105 (4)0.070 (3)0.055 (3)0.031 (3)0.007 (3)0.002 (3)
C200.072 (3)0.066 (3)0.052 (3)0.011 (2)0.009 (2)0.001 (2)
C210.061 (2)0.044 (2)0.047 (2)0.004 (2)0.003 (2)0.0032 (19)
C220.073 (3)0.048 (3)0.044 (2)0.007 (2)0.006 (2)0.000 (2)
C230.084 (3)0.052 (3)0.049 (3)0.008 (3)0.007 (2)0.000 (3)
C240.064 (3)0.099 (3)0.065 (3)0.002 (2)0.018 (3)0.006 (3)
C250.047 (2)0.069 (3)0.060 (3)0.002 (2)0.010 (2)0.005 (2)
C260.055 (3)0.088 (3)0.051 (3)0.007 (2)0.002 (2)0.003 (3)
C270.087 (3)0.082 (3)0.063 (3)0.012 (3)0.012 (3)0.001 (3)
C280.090 (4)0.092 (4)0.088 (4)0.016 (3)0.035 (3)0.023 (3)
C290.055 (3)0.091 (4)0.128 (5)0.001 (3)0.011 (4)0.024 (4)
C300.057 (3)0.074 (3)0.090 (4)0.002 (2)0.021 (3)0.002 (3)
Geometric parameters (Å, °) top
Cl1—C21.710 (4)O3—C221.200 (4)
C1—C21.383 (4)O4—C231.213 (4)
C1—C61.394 (4)N2—C231.368 (4)
C1—C81.465 (4)N2—C161.399 (4)
N1—C71.359 (4)N2—C241.446 (4)
N1—C61.407 (4)Cl2—C201.715 (4)
N1—C91.444 (4)C16—C171.366 (4)
O1—C71.202 (4)C16—C211.399 (4)
O2—C81.201 (4)C17—C181.372 (5)
C2—C31.382 (4)C17—H17A0.9300
C3—C41.378 (5)C18—C191.381 (5)
C3—H3A0.9300C18—H18A0.9300
C4—C51.369 (5)C19—C201.397 (5)
C4—H4A0.9300C19—H19A0.9300
C5—C61.379 (4)C20—C211.368 (5)
C5—H5A0.9300C21—C221.459 (5)
C7—C81.558 (4)C22—C231.537 (5)
C9—C101.496 (5)C24—C251.506 (5)
C9—H9A0.9700C24—H24A0.9700
C9—H9B0.9700C24—H24B0.9700
C10—C151.365 (5)C25—C261.364 (5)
C10—C111.378 (4)C25—C301.371 (5)
C11—C121.374 (6)C26—C271.369 (5)
C11—H11A0.9300C26—H26A0.9300
C12—C131.354 (6)C27—C281.363 (5)
C12—H12A0.9300C27—H27A0.9300
C13—C141.381 (6)C28—C291.374 (6)
C13—H13A0.9300C28—H28A0.9300
C14—C151.375 (5)C29—C301.359 (5)
C14—H14A0.9300C29—H29A0.9300
C15—H15A0.9300C30—H30A0.9300
C2—C1—C6119.8 (3)C23—N2—C16110.4 (3)
C2—C1—C8132.7 (3)C23—N2—C24122.9 (4)
C6—C1—C8107.5 (3)C16—N2—C24126.1 (3)
C7—N1—C6111.6 (3)C17—C16—N2128.6 (4)
C7—N1—C9123.8 (3)C17—C16—C21120.6 (4)
C6—N1—C9124.6 (3)N2—C16—C21110.9 (3)
C3—C2—C1119.5 (3)C16—C17—C18118.8 (4)
C3—C2—Cl1119.8 (3)C16—C17—H17A120.6
C1—C2—Cl1120.7 (3)C18—C17—H17A120.6
C4—C3—C2118.9 (4)C17—C18—C19121.8 (4)
C4—C3—H3A120.5C17—C18—H18A119.1
C2—C3—H3A120.5C19—C18—H18A119.1
C5—C4—C3123.1 (4)C18—C19—C20119.2 (4)
C5—C4—H4A118.4C18—C19—H19A120.4
C3—C4—H4A118.4C20—C19—H19A120.4
C4—C5—C6117.4 (4)C21—C20—C19119.3 (4)
C4—C5—H5A121.3C21—C20—Cl2121.0 (3)
C6—C5—H5A121.3C19—C20—Cl2119.7 (4)
C5—C6—C1121.2 (3)C20—C21—C16120.3 (4)
C5—C6—N1128.4 (3)C20—C21—C22132.4 (4)
C1—C6—N1110.4 (3)C16—C21—C22107.2 (3)
O1—C7—N1128.5 (3)O3—C22—C21132.2 (4)
O1—C7—C8125.9 (3)O3—C22—C23123.0 (4)
N1—C7—C8105.6 (3)C21—C22—C23104.8 (3)
O2—C8—C1132.3 (4)O4—C23—N2126.5 (4)
O2—C8—C7123.0 (3)O4—C23—C22126.9 (4)
C1—C8—C7104.8 (3)N2—C23—C22106.6 (3)
N1—C9—C10113.7 (3)N2—C24—C25117.0 (3)
N1—C9—H9A108.8N2—C24—H24A108.1
C10—C9—H9A108.8C25—C24—H24A108.1
N1—C9—H9B108.8N2—C24—H24B108.1
C10—C9—H9B108.8C25—C24—H24B108.1
H9A—C9—H9B107.7H24A—C24—H24B107.3
C15—C10—C11119.7 (4)C26—C25—C30119.4 (4)
C15—C10—C9120.4 (4)C26—C25—C24122.7 (4)
C11—C10—C9119.8 (4)C30—C25—C24117.9 (4)
C12—C11—C10119.5 (4)C25—C26—C27119.8 (4)
C12—C11—H11A120.2C25—C26—H26A120.1
C10—C11—H11A120.2C27—C26—H26A120.1
C13—C12—C11120.8 (5)C28—C27—C26121.3 (5)
C13—C12—H12A119.6C28—C27—H27A119.4
C11—C12—H12A119.6C26—C27—H27A119.4
C12—C13—C14119.8 (5)C27—C28—C29118.4 (5)
C12—C13—H13A120.1C27—C28—H28A120.8
C14—C13—H13A120.1C29—C28—H28A120.8
C15—C14—C13119.5 (5)C30—C29—C28120.7 (4)
C15—C14—H14A120.2C30—C29—H29A119.6
C13—C14—H14A120.2C28—C29—H29A119.6
C10—C15—C14120.5 (4)C29—C30—C25120.4 (4)
C10—C15—H15A119.8C29—C30—H30A119.8
C14—C15—H15A119.8C25—C30—H30A119.8
C6—C1—C2—C31.2 (6)C23—N2—C16—C17178.5 (4)
C8—C1—C2—C3177.0 (4)C24—N2—C16—C177.2 (6)
C6—C1—C2—Cl1179.7 (3)C23—N2—C16—C212.4 (5)
C8—C1—C2—Cl12.1 (6)C24—N2—C16—C21173.7 (4)
C1—C2—C3—C40.5 (6)N2—C16—C17—C18178.0 (4)
Cl1—C2—C3—C4178.6 (3)C21—C16—C17—C181.1 (6)
C2—C3—C4—C51.7 (6)C16—C17—C18—C190.0 (7)
C3—C4—C5—C61.1 (6)C17—C18—C19—C201.1 (7)
C4—C5—C6—C10.7 (6)C18—C19—C20—C211.2 (7)
C4—C5—C6—N1179.5 (3)C18—C19—C20—Cl2178.7 (4)
C2—C1—C6—C51.8 (6)C19—C20—C21—C160.1 (6)
C8—C1—C6—C5176.8 (3)Cl2—C20—C21—C16179.7 (3)
C2—C1—C6—N1179.2 (3)C19—C20—C21—C22178.6 (4)
C8—C1—C6—N12.2 (4)Cl2—C20—C21—C221.3 (7)
C7—N1—C6—C5176.6 (4)C17—C16—C21—C201.0 (6)
C9—N1—C6—C53.8 (6)N2—C16—C21—C20178.2 (4)
C7—N1—C6—C12.4 (4)C17—C16—C21—C22177.8 (3)
C9—N1—C6—C1177.2 (3)N2—C16—C21—C223.0 (5)
C6—N1—C7—O1179.3 (4)C20—C21—C22—O32.6 (8)
C9—N1—C7—O11.1 (6)C16—C21—C22—O3176.0 (4)
C6—N1—C7—C81.4 (4)C20—C21—C22—C23179.0 (4)
C9—N1—C7—C8178.2 (3)C16—C21—C22—C232.4 (4)
C2—C1—C8—O20.8 (8)C16—N2—C23—O4179.0 (4)
C6—C1—C8—O2177.5 (4)C24—N2—C23—O47.4 (7)
C2—C1—C8—C7179.6 (4)C16—N2—C23—C220.8 (4)
C6—C1—C8—C71.3 (4)C24—N2—C23—C22172.4 (3)
O1—C7—C8—O21.7 (6)O3—C22—C23—O42.2 (7)
N1—C7—C8—O2179.0 (3)C21—C22—C23—O4179.2 (4)
O1—C7—C8—C1179.3 (4)O3—C22—C23—N2177.6 (4)
N1—C7—C8—C10.1 (4)C21—C22—C23—N21.0 (4)
C7—N1—C9—C10102.9 (4)C23—N2—C24—C25109.5 (4)
C6—N1—C9—C1077.5 (4)C16—N2—C24—C2580.3 (5)
N1—C9—C10—C1549.4 (5)N2—C24—C25—C2625.9 (6)
N1—C9—C10—C11131.1 (3)N2—C24—C25—C30158.0 (4)
C15—C10—C11—C121.2 (6)C30—C25—C26—C272.3 (6)
C9—C10—C11—C12178.3 (4)C24—C25—C26—C27173.8 (4)
C10—C11—C12—C130.3 (7)C25—C26—C27—C281.9 (6)
C11—C12—C13—C140.2 (8)C26—C27—C28—C290.0 (7)
C12—C13—C14—C150.1 (7)C27—C28—C29—C301.5 (7)
C11—C10—C15—C141.6 (6)C28—C29—C30—C251.1 (7)
C9—C10—C15—C14177.9 (4)C26—C25—C30—C290.8 (6)
C13—C14—C15—C101.1 (7)C24—C25—C30—C29175.5 (4)
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
C3—H3A···O1i0.932.583.228 (4)127
C4—H4A···O2i0.932.563.473 (4)167
C18—H18A···O3ii0.932.403.329 (4)173
C19—H19A···O4ii0.932.603.382 (6)142
C26—H26A···O2iii0.932.593.350 (4)140
C29—H29A···O1iv0.932.593.505 (5)169
Symmetry codes: (i) −x+3/2, y+1/2, z; (ii) −x+3/2, y−1/2, z; (iii) x, −y+1/2, z+1/2; (iv) x−1/2, y, −z+3/2.
Table 1
Hydrogen-bond geometry (Å, °)
top
D—H···AD—HH···AD···AD—H···A
C3—H3A···O1i0.932.583.228 (4)127
C4—H4A···O2i0.932.563.473 (4)167
C18—H18A···O3ii0.932.403.329 (4)173
C19—H19A···O4ii0.932.603.382 (6)142
C26—H26A···O2iii0.932.593.350 (4)140
C29—H29A···O1iv0.932.593.505 (5)169
Symmetry codes: (i) −x+3/2, y+1/2, z; (ii) −x+3/2, y−1/2, z; (iii) x, −y+1/2, z+1/2; (iv) x−1/2, y, −z+3/2.
Acknowledgements top

The authors thank the Center of Testing and Analysis, Nanjing University, for support.

references
References top

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.

Bouhfid, R., Joly, N., Massoui, M., Cecchelli, R., Lequart, V., Martin, P. & Essassi, E. M. (2005). Heterocycles, 65, 2949–2955.

Enraf–Nonius (1994). CAD-4 EXPRESS. Enraf–Nonius, Delft, The Netherlands.

Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.

Liu, H., Fan, D., Wang, D. & Ou-yang, P.-K. (2011). Acta Cryst. E67, o3427.

North, A. C. T., Phillips, D. C. & Mathews, F. S. (1968). Acta Cryst. A24, 351–359.

Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.

Spek, A. L. (2009). Acta Cryst. D65, 148–155.