organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

(E)-3-(1,3-Benzodioxol-5-yl)-1-{4-[bis­­(4-meth­­oxy­phen­yl)meth­yl]piperazin-1-yl}prop-2-en-1-one

aSchool of Chemistry and Chemical Engineering, Southeast University, Sipailou No. 2 Nanjing, Nanjing 210096, People's Republic of China, and bSchool of Pharmacy, Nanjing Medical University, Hanzhong Road No. 140 Nanjing, Nanjing 210029, People's Republic of China
*Correspondence e-mail: wubin@njmu.edu.cn

(Received 1 February 2012; accepted 2 February 2012; online 10 February 2012)

There are two crystallographically independent mol­ecules in the asymmetric unit of the title compound, C29H30N2O5, each having an E conformation about the C=C double bond. The dihedral angles between the meth­oxy­benzene rings in the two mol­ecules are 71.39 (17) and 68.64 (17)°. In the crystal, mol­ecules are linked by C—H⋯O inter­actions.

Related literature

For related structures and background to cinnamic acid derivatives, see: Teng et al. (2011[Teng, Y.-B., Dai, Z.-H. & Wu, B. (2011). Acta Cryst. E67, o697.]); Zhong et al. (2012[Zhong, Y., Zhang, X. P. & Wu, B. (2012). Acta Cryst. E68, o298.]). For further synthetic details, see: Wu et al. (2008[Wu, B., Zhou, L. & Cai, H.-H. (2008). Chin. Chem. Lett. 19, 1163-1166.]).

[Scheme 1]

Experimental

Crystal data
  • C29H30N2O5

  • Mr = 486.50

  • Triclinic, [P \overline 1]

  • a = 12.188 (2) Å

  • b = 12.589 (3) Å

  • c = 17.102 (3) Å

  • α = 76.52 (3)°

  • β = 84.10 (3)°

  • γ = 89.95 (3)°

  • V = 2537.5 (9) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.09 mm−1

  • T = 293 K

  • 0.30 × 0.20 × 0.20 mm

Data collection
  • Enraf–Nonius CAD-4 diffractometer

  • Absorption correction: ψ scan (North et al., 1968[North, A. C. T., Phillips, D. C. & Mathews, F. S. (1968). Acta Cryst. A24, 351-359.]) Tmin = 0.974, Tmax = 0.983

  • 9818 measured reflections

  • 9340 independent reflections

  • 5434 reflections with I > 2σ(I)

  • Rint = 0.015

  • 3 standard reflections every 200 reflections intensity decay: 1%

Refinement
  • R[F2 > 2σ(F2)] = 0.068

  • wR(F2) = 0.193

  • S = 1.00

  • 9340 reflections

  • 649 parameters

  • H-atom parameters constrained

  • Δρmax = 0.21 e Å−3

  • Δρmin = −0.21 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
C29—H29A⋯O10i 0.97 2.52 3.134 (5) 121
C44—H44A⋯O6ii 0.96 2.59 3.322 (5) 134
C47—H47B⋯O4ii 0.97 2.48 3.353 (5) 149
C53—H53A⋯O5iii 0.93 2.35 3.266 (4) 169
Symmetry codes: (i) -x, -y+1, -z+1; (ii) x+1, y, z; (iii) x+1, y+1, z.

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994[Enraf-Nonius (1994). CAD-4 EXPRESS. Enraf-Nonius, Delft, The Netherlands.]); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995[Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.]); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: SHELXL97; software used to prepare material for publication: SHELXL97.

Supporting information


Comment top

As a continuation of our study of cinnamic acid derivatives (Teng et al., 2011; Zhong et al., 2012), we present here the title compound (I). In (I) (Fig. 1), all bond lengths and angles are normal and correspond to those observed in related compounds (Teng et al., 2011; Zhong et al., 2012). The asymmetric unit of the title compound contains two crystallographically independent molecules with different absolute configurations. The dihedral angle between the methoxybenzene rings in the two molecules are 71.39 (17) and 68.64 (17)°.

Related literature top

For related structures and background to cinnamic acid derivatives, see: Teng et al. (2011); Zhong et al., (2012). For further synthetic details, see: Wu et al. (2008).

Experimental top

The synthesis follows the method of Wu et al. (2008). The title compound was prepared by stirring a mixture of (E)(benzo[d][1,3]dioxol-5-yl) acrylic acid (0.769 g; 4 mmol), thionyl chloride (2 ml) and dichloromethane (30 ml) for 6 h at room temperature. The solvent was removed under reduced pressure. The residue was dissolved in acetone (15 ml) and reacted with 1-(bis(4-methoxyphenyl)methyl)iperazine (1.874 g; 6 mmol) in the presence of triethylamine (5 ml) for 12 h at room temperature. The resultant mixture was cooled. The solid, (E)-3-(benzo[d][1,3]dioxol-5-yl)-1-(4-(bis(4- methoxyphenyl)methyl)piperazin-1-yl)prop-2-en-1-one obtained was filtered and was recrystallized from ethanol. The pale-yellow blocks were grown from ethanol:ethyl acetate (1:1) solution by a slow evaporation at room temperature.

Refinement top

All non-hydrogen atoms were refined anisotropically. All hydrogen atoms were positioned geometrically with C—H distances ranging from 0.93 Å to 0.98 Å and refined as riding on their parent atoms with Uĩso~(H) = 1.2 or 1.5U~eq~ of the carrier atom.

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: SHELXL97 (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of (I) with displacement ellipsoids for non-H drawn at 70% probability level.
[Figure 2] Fig. 2. Packing diagram of the title compound.
(E)-3-(1,3-Benzodioxol-5-yl)-1-{4-[bis(4- methoxyphenyl)methyl]piperazin-1-yl}prop-2-en-1-one top
Crystal data top
C29H30N2O5Z = 4
Mr = 486.50F(000) = 1032
Triclinic, P1Dx = 1.274 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 12.188 (2) ÅCell parameters from 25 reflections
b = 12.589 (3) Åθ = 9–13°
c = 17.102 (3) ŵ = 0.09 mm1
α = 76.52 (3)°T = 293 K
β = 84.10 (3)°Block, pale-yellow
γ = 89.95 (3)°0.30 × 0.20 × 0.20 mm
V = 2537.5 (9) Å3
Data collection top
Enraf–Nonius CAD-4
diffractometer
5434 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.015
Graphite monochromatorθmax = 25.4°, θmin = 1.2°
ω/2θ scansh = 140
Absorption correction: ψ scan
(North et al., 1968)
k = 1515
Tmin = 0.974, Tmax = 0.983l = 2020
9818 measured reflections3 standard reflections every 200 reflections
9340 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)] = 0.068Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.193H-atom parameters constrained
S = 1.00 w = 1/[σ2(Fo2) + (0.1P)2 + 0.5P]
where P = (Fo2 + 2Fc2)/3
9340 reflections(Δ/σ)max < 0.001
649 parametersΔρmax = 0.21 e Å3
0 restraintsΔρmin = 0.21 e Å3
Crystal data top
C29H30N2O5γ = 89.95 (3)°
Mr = 486.50V = 2537.5 (9) Å3
Triclinic, P1Z = 4
a = 12.188 (2) ÅMo Kα radiation
b = 12.589 (3) ŵ = 0.09 mm1
c = 17.102 (3) ÅT = 293 K
α = 76.52 (3)°0.30 × 0.20 × 0.20 mm
β = 84.10 (3)°
Data collection top
Enraf–Nonius CAD-4
diffractometer
5434 reflections with I > 2σ(I)
Absorption correction: ψ scan
(North et al., 1968)
Rint = 0.015
Tmin = 0.974, Tmax = 0.9833 standard reflections every 200 reflections
9818 measured reflections intensity decay: 1%
9340 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0680 restraints
wR(F2) = 0.193H-atom parameters constrained
S = 1.00Δρmax = 0.21 e Å3
9340 reflectionsΔρmin = 0.21 e Å3
649 parameters
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
N10.55160 (19)0.55413 (18)0.24848 (14)0.0487 (6)
O11.0307 (2)0.7745 (3)0.1321 (2)0.1103 (10)
C10.7676 (3)0.6823 (3)0.0918 (2)0.0724 (10)
H1A0.73860.66470.04810.087*
N20.4762 (2)0.3419 (2)0.34069 (16)0.0588 (7)
O20.3170 (2)1.0136 (2)0.14123 (16)0.0865 (8)
C20.8757 (3)0.7169 (3)0.0836 (2)0.0850 (11)
H2A0.91860.72220.03450.102*
O30.50956 (19)0.16387 (18)0.35334 (16)0.0796 (7)
C30.9214 (3)0.7436 (3)0.1462 (2)0.0697 (10)
O40.1208 (2)0.15508 (19)0.43410 (17)0.0843 (8)
C40.8567 (3)0.7361 (3)0.2173 (2)0.0627 (9)
H4A0.88610.75520.26040.075*
O50.16342 (19)0.00103 (19)0.39582 (16)0.0783 (7)
C50.7486 (3)0.7009 (2)0.22616 (18)0.0563 (8)
H5A0.70660.69550.27550.068*
C60.7004 (2)0.6730 (2)0.16372 (17)0.0504 (7)
C70.5795 (2)0.6381 (2)0.17202 (17)0.0520 (7)
H7A0.56880.60420.12720.062*
C80.5065 (2)0.7357 (2)0.16465 (17)0.0502 (7)
C90.4540 (3)0.7735 (3)0.09669 (19)0.0656 (9)
H9A0.46110.73480.05640.079*
C100.3916 (3)0.8654 (3)0.0851 (2)0.0743 (10)
H10A0.35860.88870.03750.089*
C110.3782 (3)0.9229 (3)0.1447 (2)0.0608 (8)
C120.4293 (3)0.8858 (3)0.2137 (2)0.0628 (8)
H12A0.42180.92400.25440.075*
C130.4903 (3)0.7947 (3)0.22343 (18)0.0588 (8)
H13A0.52240.77090.27130.071*
C160.4343 (2)0.5216 (2)0.26006 (19)0.0533 (8)
H16A0.41630.49280.21490.064*
H16B0.38960.58510.26140.064*
C141.0783 (4)0.8160 (5)0.1897 (4)0.133 (2)
H14A1.15470.83400.17170.200*
H14B1.07250.76210.24010.200*
H14C1.04060.88050.19710.200*
C170.4079 (3)0.4360 (2)0.3378 (2)0.0581 (8)
H17A0.41890.46740.38320.070*
H17B0.33100.41330.34290.070*
C150.2702 (4)1.0603 (4)0.0683 (3)0.1136 (16)
H15A0.22921.12340.07470.170*
H15B0.22191.00750.05620.170*
H15C0.32811.08150.02480.170*
C180.5928 (2)0.3711 (3)0.3251 (2)0.0653 (9)
H18A0.63500.30670.32150.078*
H18B0.61580.39840.36950.078*
C190.6159 (2)0.4572 (3)0.2474 (2)0.0601 (8)
H19A0.69380.47730.23900.072*
H19B0.59870.42750.20250.072*
C200.4431 (3)0.2357 (3)0.35612 (19)0.0564 (8)
C210.3225 (2)0.2102 (2)0.37468 (18)0.0542 (8)
H21A0.27600.26120.39120.065*
C220.2806 (3)0.1167 (2)0.36819 (19)0.0588 (8)
H22A0.33090.06640.35500.071*
C230.1643 (3)0.0825 (2)0.37921 (18)0.0534 (8)
C240.0798 (3)0.1440 (2)0.40747 (19)0.0565 (8)
H24A0.09580.20760.42340.068*
C250.0261 (3)0.1082 (2)0.41086 (18)0.0546 (8)
C260.0519 (3)0.0146 (2)0.38868 (19)0.0565 (8)
C270.0272 (3)0.0484 (3)0.3627 (2)0.0750 (10)
H27A0.00950.11300.34880.090*
C280.1363 (3)0.0123 (3)0.3577 (2)0.0683 (9)
H28A0.19230.05350.33930.082*
C290.2091 (3)0.0876 (3)0.4238 (3)0.0796 (11)
H29A0.25430.06140.47480.096*
H29B0.25520.12880.38490.096*
O60.7706 (2)0.0983 (2)0.08851 (15)0.0784 (7)
O71.49740 (19)0.3416 (2)0.07875 (14)0.0782 (7)
O80.99144 (18)0.66771 (19)0.42440 (15)0.0725 (7)
O90.35558 (17)0.62973 (18)0.45580 (15)0.0697 (6)
O100.31739 (18)0.81125 (19)0.43670 (15)0.0721 (6)
N31.02818 (19)0.40906 (19)0.25906 (15)0.0528 (6)
N40.96061 (19)0.5108 (2)0.38878 (16)0.0573 (7)
C300.9733 (2)0.3241 (2)0.15224 (18)0.0531 (7)
C310.9568 (3)0.2196 (3)0.2009 (2)0.0746 (11)
H31A0.99160.20060.24800.090*
C320.8902 (3)0.1430 (3)0.1817 (2)0.0746 (10)
H32A0.88010.07400.21620.089*
C330.8390 (3)0.1674 (3)0.1126 (2)0.0592 (8)
C340.8552 (3)0.2700 (3)0.0629 (2)0.0710 (10)
H34A0.82220.28770.01500.085*
C350.9198 (3)0.3467 (3)0.0833 (2)0.0651 (9)
H35A0.92760.41630.04950.078*
C361.0476 (2)0.4080 (2)0.17213 (18)0.0538 (8)
H36A1.02880.48000.14070.065*
C371.1677 (2)0.3903 (2)0.14871 (17)0.0514 (7)
C381.2193 (3)0.2976 (3)0.1841 (2)0.0664 (9)
H38A1.17890.24520.22390.080*
C391.3285 (3)0.2784 (3)0.1633 (2)0.0657 (9)
H39A1.36060.21470.18950.079*
C401.3900 (3)0.3537 (3)0.10347 (18)0.0571 (8)
C411.3401 (3)0.4478 (3)0.06647 (19)0.0643 (9)
H41A1.38030.49960.02590.077*
C421.2323 (3)0.4654 (3)0.08904 (18)0.0590 (8)
H42A1.20070.52990.06370.071*
C430.7375 (5)0.0016 (3)0.1443 (3)0.127 (2)
H43A0.69030.04270.11990.191*
H43B0.69820.01350.19190.191*
H43C0.80150.04320.15860.191*
C441.5496 (3)0.2451 (4)0.1164 (3)0.0907 (12)
H44A1.62510.24700.09370.136*
H44B1.51210.18250.10780.136*
H44C1.54690.24060.17340.136*
C451.0958 (2)0.4951 (3)0.2769 (2)0.0576 (8)
H45A1.07790.56540.24390.069*
H45B1.17320.48240.26330.069*
C461.0763 (3)0.4974 (3)0.3647 (2)0.0647 (9)
H46A1.10100.42980.39740.078*
H46B1.11910.55710.37420.078*
C470.8916 (3)0.4280 (3)0.3697 (2)0.0673 (9)
H47A0.81450.44250.38270.081*
H47B0.90730.35670.40220.081*
C480.9127 (2)0.4279 (3)0.2814 (2)0.0630 (9)
H48A0.86730.37120.27000.076*
H48B0.89200.49760.24910.076*
C490.9251 (2)0.5981 (2)0.41624 (18)0.0523 (7)
C500.8053 (2)0.6090 (2)0.43409 (18)0.0507 (7)
H50A0.75990.54680.44640.061*
C510.7610 (2)0.7044 (2)0.43307 (17)0.0505 (7)
H51A0.81060.76220.42840.061*
C520.6441 (2)0.7322 (2)0.43834 (17)0.0463 (7)
C530.6168 (3)0.8402 (2)0.4283 (2)0.0611 (9)
H53A0.67340.89200.42180.073*
C540.5091 (3)0.8758 (3)0.4273 (2)0.0670 (9)
H54A0.49270.94930.42120.080*
C550.4290 (2)0.7981 (3)0.43584 (18)0.0520 (7)
C560.4537 (2)0.6898 (2)0.44671 (17)0.0485 (7)
C570.5584 (2)0.6537 (2)0.44787 (17)0.0510 (7)
H57A0.57330.57980.45470.061*
C580.2750 (3)0.7087 (3)0.4303 (2)0.0738 (10)
H58C0.26210.71130.37490.089*
H58A0.20590.69030.46440.089*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
N10.0479 (14)0.0481 (13)0.0491 (14)0.0036 (11)0.0107 (11)0.0072 (11)
O10.077 (2)0.139 (3)0.108 (2)0.0300 (18)0.0070 (17)0.021 (2)
C10.073 (2)0.099 (3)0.047 (2)0.004 (2)0.0015 (17)0.0225 (18)
N20.0505 (15)0.0496 (15)0.0735 (18)0.0089 (12)0.0131 (13)0.0059 (12)
O20.106 (2)0.0724 (16)0.0827 (18)0.0310 (15)0.0291 (15)0.0137 (13)
C20.076 (3)0.113 (3)0.061 (2)0.005 (2)0.015 (2)0.018 (2)
O30.0619 (15)0.0553 (14)0.115 (2)0.0031 (12)0.0060 (14)0.0085 (13)
C30.050 (2)0.074 (2)0.074 (3)0.0135 (17)0.0056 (18)0.0009 (18)
O40.0647 (16)0.0678 (15)0.124 (2)0.0184 (13)0.0136 (14)0.0388 (15)
C40.064 (2)0.0597 (19)0.063 (2)0.0105 (16)0.0100 (17)0.0098 (16)
O50.0618 (15)0.0709 (15)0.106 (2)0.0196 (12)0.0019 (13)0.0329 (14)
C50.058 (2)0.0652 (19)0.0434 (18)0.0069 (16)0.0029 (14)0.0095 (14)
C60.0532 (18)0.0504 (16)0.0454 (17)0.0016 (14)0.0040 (14)0.0073 (13)
C70.0580 (19)0.0580 (18)0.0429 (17)0.0010 (15)0.0108 (14)0.0152 (14)
C80.0561 (18)0.0514 (17)0.0426 (17)0.0038 (14)0.0069 (14)0.0093 (13)
C90.076 (2)0.077 (2)0.050 (2)0.0109 (19)0.0222 (17)0.0198 (17)
C100.094 (3)0.080 (2)0.052 (2)0.020 (2)0.0315 (19)0.0110 (18)
C110.061 (2)0.0577 (19)0.060 (2)0.0036 (16)0.0124 (16)0.0048 (16)
C120.073 (2)0.064 (2)0.054 (2)0.0072 (18)0.0119 (17)0.0177 (16)
C130.067 (2)0.065 (2)0.0446 (18)0.0085 (17)0.0135 (15)0.0092 (15)
C160.0449 (17)0.0508 (17)0.067 (2)0.0010 (14)0.0148 (15)0.0147 (15)
C140.101 (4)0.136 (5)0.165 (5)0.045 (3)0.002 (4)0.044 (4)
C170.0483 (18)0.0544 (18)0.071 (2)0.0044 (15)0.0053 (15)0.0149 (16)
C150.150 (4)0.088 (3)0.106 (4)0.035 (3)0.062 (3)0.009 (3)
C180.0488 (19)0.0542 (19)0.088 (3)0.0054 (15)0.0173 (17)0.0019 (17)
C190.0414 (17)0.064 (2)0.073 (2)0.0038 (15)0.0098 (15)0.0105 (17)
C200.055 (2)0.0545 (19)0.057 (2)0.0021 (16)0.0113 (15)0.0061 (15)
C210.0535 (19)0.0526 (18)0.0542 (19)0.0058 (15)0.0048 (14)0.0079 (14)
C220.063 (2)0.0482 (17)0.064 (2)0.0012 (15)0.0132 (16)0.0077 (15)
C230.060 (2)0.0426 (16)0.0546 (18)0.0077 (15)0.0145 (15)0.0024 (13)
C240.066 (2)0.0424 (16)0.060 (2)0.0112 (15)0.0043 (16)0.0114 (14)
C250.058 (2)0.0466 (17)0.0555 (19)0.0084 (15)0.0013 (15)0.0079 (14)
C260.056 (2)0.0491 (17)0.062 (2)0.0134 (15)0.0076 (16)0.0069 (15)
C270.074 (3)0.056 (2)0.101 (3)0.0117 (19)0.013 (2)0.030 (2)
C280.066 (2)0.0502 (19)0.094 (3)0.0026 (16)0.0142 (19)0.0240 (17)
C290.065 (2)0.068 (2)0.106 (3)0.0165 (19)0.002 (2)0.026 (2)
O60.0875 (18)0.0769 (16)0.0730 (16)0.0148 (14)0.0287 (13)0.0134 (13)
O70.0628 (16)0.1024 (19)0.0665 (16)0.0013 (14)0.0093 (12)0.0209 (14)
O80.0543 (14)0.0714 (15)0.1018 (19)0.0079 (12)0.0103 (12)0.0396 (13)
O90.0468 (13)0.0665 (14)0.0915 (18)0.0104 (11)0.0030 (12)0.0139 (12)
O100.0505 (14)0.0747 (15)0.0954 (18)0.0078 (12)0.0081 (12)0.0283 (13)
N30.0462 (15)0.0557 (15)0.0569 (16)0.0011 (12)0.0034 (12)0.0148 (12)
N40.0431 (14)0.0567 (15)0.0786 (19)0.0027 (12)0.0045 (13)0.0298 (13)
C300.0544 (19)0.0549 (18)0.0478 (18)0.0033 (14)0.0111 (14)0.0054 (14)
C310.109 (3)0.0537 (19)0.063 (2)0.0016 (19)0.042 (2)0.0020 (16)
C320.105 (3)0.0507 (19)0.066 (2)0.0030 (19)0.031 (2)0.0012 (16)
C330.062 (2)0.0560 (19)0.061 (2)0.0020 (16)0.0155 (16)0.0116 (16)
C340.064 (2)0.081 (2)0.061 (2)0.0079 (19)0.0262 (17)0.0064 (18)
C350.054 (2)0.066 (2)0.064 (2)0.0082 (16)0.0190 (16)0.0122 (16)
C360.0575 (19)0.0482 (16)0.0518 (19)0.0014 (14)0.0139 (15)0.0003 (13)
C370.0550 (19)0.0512 (17)0.0451 (17)0.0003 (14)0.0052 (14)0.0055 (13)
C380.066 (2)0.063 (2)0.057 (2)0.0062 (17)0.0098 (17)0.0048 (16)
C390.068 (2)0.064 (2)0.058 (2)0.0105 (17)0.0030 (17)0.0051 (16)
C400.053 (2)0.074 (2)0.0459 (18)0.0055 (17)0.0016 (15)0.0214 (16)
C410.058 (2)0.078 (2)0.0488 (19)0.0165 (18)0.0018 (16)0.0015 (16)
C420.066 (2)0.0537 (18)0.0529 (19)0.0080 (16)0.0153 (16)0.0001 (14)
C430.176 (5)0.074 (3)0.129 (4)0.045 (3)0.059 (4)0.000 (3)
C440.064 (2)0.121 (3)0.088 (3)0.023 (2)0.000 (2)0.032 (3)
C450.0386 (17)0.0642 (19)0.073 (2)0.0001 (14)0.0091 (15)0.0206 (16)
C460.050 (2)0.074 (2)0.078 (2)0.0040 (16)0.0140 (17)0.0315 (18)
C470.054 (2)0.061 (2)0.090 (3)0.0096 (16)0.0123 (17)0.0329 (18)
C480.0487 (19)0.0580 (19)0.089 (3)0.0051 (15)0.0075 (17)0.0300 (17)
C490.0500 (18)0.0514 (17)0.0561 (19)0.0018 (15)0.0078 (14)0.0129 (14)
C500.0490 (18)0.0498 (17)0.0547 (18)0.0037 (14)0.0047 (14)0.0151 (14)
C510.0495 (18)0.0523 (18)0.0537 (18)0.0048 (14)0.0075 (14)0.0195 (14)
C520.0460 (17)0.0503 (17)0.0453 (16)0.0008 (13)0.0061 (13)0.0160 (13)
C530.052 (2)0.0508 (18)0.086 (2)0.0072 (15)0.0064 (17)0.0266 (16)
C540.063 (2)0.0503 (18)0.092 (3)0.0079 (17)0.0107 (19)0.0258 (17)
C550.0442 (18)0.0594 (19)0.0555 (19)0.0022 (15)0.0043 (14)0.0200 (15)
C560.0440 (18)0.0527 (17)0.0474 (17)0.0068 (14)0.0005 (13)0.0114 (13)
C570.0557 (19)0.0435 (16)0.0525 (18)0.0004 (14)0.0014 (14)0.0117 (13)
C580.049 (2)0.079 (2)0.092 (3)0.0057 (19)0.0018 (18)0.020 (2)
Geometric parameters (Å, º) top
N1—C191.452 (4)O6—C331.364 (4)
N1—C161.469 (3)O6—C431.420 (5)
N1—C71.486 (4)O7—C401.354 (4)
O1—C31.369 (4)O7—C441.419 (4)
O1—C141.393 (6)O8—C491.234 (3)
C1—C21.371 (5)O9—C561.391 (3)
C1—C61.386 (4)O9—C581.424 (4)
C1—H1A0.9300O10—C551.369 (3)
N2—C201.354 (4)O10—C581.423 (4)
N2—C171.443 (4)N3—C481.454 (4)
N2—C181.450 (4)N3—C451.467 (4)
O2—C111.356 (4)N3—C361.484 (4)
O2—C151.425 (4)N4—C491.347 (4)
C2—C31.364 (5)N4—C461.448 (4)
C2—H2A0.9300N4—C471.455 (4)
O3—C201.219 (4)C30—C351.377 (4)
C3—C41.365 (5)C30—C311.386 (4)
O4—C251.361 (4)C30—C361.511 (4)
O4—C291.422 (4)C31—C321.379 (4)
C4—C51.372 (4)C31—H31A0.9300
C4—H4A0.9300C32—C331.364 (4)
O5—C261.362 (4)C32—H32A0.9300
O5—C291.406 (4)C33—C341.373 (4)
C5—C61.383 (4)C34—C351.375 (4)
C5—H5A0.9300C34—H34A0.9300
C6—C71.521 (4)C35—H35A0.9300
C7—C81.506 (4)C36—C371.508 (4)
C7—H7A0.9800C36—H36A0.9800
C8—C91.372 (4)C37—C381.368 (4)
C8—C131.381 (4)C37—C421.393 (4)
C9—C101.370 (4)C38—C391.378 (4)
C9—H9A0.9300C38—H38A0.9300
C10—C111.378 (5)C39—C401.377 (4)
C10—H10A0.9300C39—H39A0.9300
C11—C121.376 (4)C40—C411.379 (4)
C12—C131.353 (4)C41—C421.365 (4)
C12—H12A0.9300C41—H41A0.9300
C13—H13A0.9300C42—H42A0.9300
C16—C171.509 (4)C43—H43A0.9600
C16—H16A0.9700C43—H43B0.9600
C16—H16B0.9700C43—H43C0.9600
C14—H14A0.9600C44—H44A0.9600
C14—H14B0.9600C44—H44B0.9600
C14—H14C0.9600C44—H44C0.9600
C17—H17A0.9700C45—C461.503 (4)
C17—H17B0.9700C45—H45A0.9700
C15—H15A0.9600C45—H45B0.9700
C15—H15B0.9600C46—H46A0.9700
C15—H15C0.9600C46—H46B0.9700
C18—C191.508 (4)C47—C481.506 (5)
C18—H18A0.9700C47—H47A0.9700
C18—H18B0.9700C47—H47B0.9700
C19—H19A0.9700C48—H48A0.9700
C19—H19B0.9700C48—H48B0.9700
C20—C211.490 (4)C49—C501.473 (4)
C21—C221.316 (4)C50—C511.313 (4)
C21—H21A0.9300C50—H50A0.9300
C22—C231.462 (4)C51—C521.466 (4)
C22—H22A0.9300C51—H51A0.9300
C23—C281.380 (4)C52—C531.375 (4)
C23—C241.402 (4)C52—C571.409 (4)
C24—C251.358 (4)C53—C541.387 (4)
C24—H24A0.9300C53—H53A0.9300
C25—C261.366 (4)C54—C551.356 (4)
C26—C271.353 (5)C54—H54A0.9300
C27—C281.394 (5)C55—C561.371 (4)
C27—H27A0.9300C56—C571.355 (4)
C28—H28A0.9300C57—H57A0.9300
C29—H29A0.9700C58—H58C0.9700
C29—H29B0.9700C58—H58A0.9700
C19—N1—C16108.0 (2)C33—O6—C43117.7 (3)
C19—N1—C7109.9 (2)C40—O7—C44117.9 (3)
C16—N1—C7111.7 (2)C56—O9—C58104.8 (2)
C3—O1—C14118.8 (4)C55—O10—C58104.7 (2)
C2—C1—C6121.7 (3)C48—N3—C45108.7 (2)
C2—C1—H1A119.2C48—N3—C36110.7 (2)
C6—C1—H1A119.2C45—N3—C36110.6 (2)
C20—N2—C17127.6 (3)C49—N4—C46121.7 (2)
C20—N2—C18120.0 (3)C49—N4—C47126.2 (3)
C17—N2—C18112.3 (2)C46—N4—C47111.6 (2)
C11—O2—C15118.7 (3)C35—C30—C31116.0 (3)
C3—C2—C1121.0 (3)C35—C30—C36121.7 (3)
C3—C2—H2A119.5C31—C30—C36122.3 (3)
C1—C2—H2A119.5C32—C31—C30121.9 (3)
C2—C3—C4118.5 (3)C32—C31—H31A119.0
C2—C3—O1116.3 (3)C30—C31—H31A119.0
C4—C3—O1125.3 (4)C33—C32—C31120.7 (3)
C25—O4—C29106.4 (2)C33—C32—H32A119.6
C3—C4—C5120.8 (3)C31—C32—H32A119.6
C3—C4—H4A119.6C32—C33—O6125.4 (3)
C5—C4—H4A119.6C32—C33—C34118.4 (3)
C26—O5—C29106.1 (2)O6—C33—C34116.1 (3)
C4—C5—C6121.9 (3)C33—C34—C35120.5 (3)
C4—C5—H5A119.0C33—C34—H34A119.8
C6—C5—H5A119.0C35—C34—H34A119.8
C5—C6—C1116.2 (3)C34—C35—C30122.4 (3)
C5—C6—C7122.2 (3)C34—C35—H35A118.8
C1—C6—C7121.6 (3)C30—C35—H35A118.8
N1—C7—C8112.9 (2)N3—C36—C37110.7 (2)
N1—C7—C6110.2 (2)N3—C36—C30111.0 (2)
C8—C7—C6110.7 (2)C37—C36—C30112.0 (3)
N1—C7—H7A107.6N3—C36—H36A107.7
C8—C7—H7A107.6C37—C36—H36A107.7
C6—C7—H7A107.6C30—C36—H36A107.7
C9—C8—C13115.7 (3)C38—C37—C42115.9 (3)
C9—C8—C7121.1 (3)C38—C37—C36121.6 (3)
C13—C8—C7123.2 (3)C42—C37—C36122.5 (3)
C10—C9—C8123.4 (3)C37—C38—C39123.0 (3)
C10—C9—H9A118.3C37—C38—H38A118.5
C8—C9—H9A118.3C39—C38—H38A118.5
C9—C10—C11119.3 (3)C40—C39—C38119.8 (3)
C9—C10—H10A120.4C40—C39—H39A120.1
C11—C10—H10A120.4C38—C39—H39A120.1
O2—C11—C12116.8 (3)O7—C40—C39124.0 (3)
O2—C11—C10125.0 (3)O7—C40—C41117.4 (3)
C12—C11—C10118.3 (3)C39—C40—C41118.6 (3)
C13—C12—C11121.1 (3)C42—C41—C40120.4 (3)
C13—C12—H12A119.5C42—C41—H41A119.8
C11—C12—H12A119.5C40—C41—H41A119.8
C12—C13—C8122.3 (3)C41—C42—C37122.4 (3)
C12—C13—H13A118.9C41—C42—H42A118.8
C8—C13—H13A118.9C37—C42—H42A118.8
N1—C16—C17110.8 (2)O6—C43—H43A109.5
N1—C16—H16A109.5O6—C43—H43B109.5
C17—C16—H16A109.5H43A—C43—H43B109.5
N1—C16—H16B109.5O6—C43—H43C109.5
C17—C16—H16B109.5H43A—C43—H43C109.5
H16A—C16—H16B108.1H43B—C43—H43C109.5
O1—C14—H14A109.5O7—C44—H44A109.5
O1—C14—H14B109.5O7—C44—H44B109.5
H14A—C14—H14B109.5H44A—C44—H44B109.5
O1—C14—H14C109.5O7—C44—H44C109.5
H14A—C14—H14C109.5H44A—C44—H44C109.5
H14B—C14—H14C109.5H44B—C44—H44C109.5
N2—C17—C16111.7 (3)N3—C45—C46111.1 (3)
N2—C17—H17A109.3N3—C45—H45A109.4
C16—C17—H17A109.3C46—C45—H45A109.4
N2—C17—H17B109.3N3—C45—H45B109.4
C16—C17—H17B109.3C46—C45—H45B109.4
H17A—C17—H17B107.9H45A—C45—H45B108.0
O2—C15—H15A109.5N4—C46—C45111.4 (3)
O2—C15—H15B109.5N4—C46—H46A109.4
H15A—C15—H15B109.5C45—C46—H46A109.4
O2—C15—H15C109.5N4—C46—H46B109.4
H15A—C15—H15C109.5C45—C46—H46B109.4
H15B—C15—H15C109.5H46A—C46—H46B108.0
N2—C18—C19110.7 (3)N4—C47—C48110.4 (3)
N2—C18—H18A109.5N4—C47—H47A109.6
C19—C18—H18A109.5C48—C47—H47A109.6
N2—C18—H18B109.5N4—C47—H47B109.6
C19—C18—H18B109.5C48—C47—H47B109.6
H18A—C18—H18B108.1H47A—C47—H47B108.1
N1—C19—C18111.7 (3)N3—C48—C47111.3 (3)
N1—C19—H19A109.3N3—C48—H48A109.4
C18—C19—H19A109.3C47—C48—H48A109.4
N1—C19—H19B109.3N3—C48—H48B109.4
C18—C19—H19B109.3C47—C48—H48B109.4
H19A—C19—H19B107.9H48A—C48—H48B108.0
O3—C20—N2121.0 (3)O8—C49—N4120.5 (3)
O3—C20—C21121.3 (3)O8—C49—C50121.4 (3)
N2—C20—C21117.7 (3)N4—C49—C50118.1 (3)
C22—C21—C20121.2 (3)C51—C50—C49121.7 (3)
C22—C21—H21A119.4C51—C50—H50A119.1
C20—C21—H21A119.4C49—C50—H50A119.1
C21—C22—C23127.7 (3)C50—C51—C52128.8 (3)
C21—C22—H22A116.2C50—C51—H51A115.6
C23—C22—H22A116.2C52—C51—H51A115.6
C28—C23—C24118.7 (3)C53—C52—C57118.3 (3)
C28—C23—C22118.4 (3)C53—C52—C51118.8 (3)
C24—C23—C22122.9 (3)C57—C52—C51122.8 (3)
C25—C24—C23118.1 (3)C52—C53—C54123.4 (3)
C25—C24—H24A121.0C52—C53—H53A118.3
C23—C24—H24A121.0C54—C53—H53A118.3
C24—C25—O4128.6 (3)C55—C54—C53116.6 (3)
C24—C25—C26122.2 (3)C55—C54—H54A121.7
O4—C25—C26109.2 (3)C53—C54—H54A121.7
C27—C26—O5128.0 (3)C54—C55—O10128.3 (3)
C27—C26—C25121.6 (3)C54—C55—C56121.3 (3)
O5—C26—C25110.4 (3)O10—C55—C56110.4 (3)
C26—C27—C28117.0 (3)C57—C56—C55122.8 (3)
C26—C27—H27A121.5C57—C56—O9128.9 (3)
C28—C27—H27A121.5C55—C56—O9108.4 (3)
C23—C28—C27122.4 (3)C56—C57—C52117.6 (3)
C23—C28—H28A118.8C56—C57—H57A121.2
C27—C28—H28A118.8C52—C57—H57A121.2
O5—C29—O4108.0 (3)O10—C58—O9106.9 (3)
O5—C29—H29A110.1O10—C58—H58C110.3
O4—C29—H29A110.1O9—C58—H58C110.3
O5—C29—H29B110.1O10—C58—H58A110.3
O4—C29—H29B110.1O9—C58—H58A110.3
H29A—C29—H29B108.4H58C—C58—H58A108.6
C6—C1—C2—C30.0 (6)C35—C30—C31—C320.3 (5)
C1—C2—C3—C40.6 (6)C36—C30—C31—C32179.0 (3)
C1—C2—C3—O1178.4 (4)C30—C31—C32—C330.9 (6)
C14—O1—C3—C2171.9 (4)C31—C32—C33—O6179.1 (3)
C14—O1—C3—C49.2 (6)C31—C32—C33—C340.2 (6)
C2—C3—C4—C51.1 (5)C43—O6—C33—C329.1 (6)
O1—C3—C4—C5177.8 (3)C43—O6—C33—C34169.9 (4)
C3—C4—C5—C60.9 (5)C32—C33—C34—C351.2 (6)
C4—C5—C6—C10.2 (5)O6—C33—C34—C35177.8 (3)
C4—C5—C6—C7177.6 (3)C33—C34—C35—C301.9 (6)
C2—C1—C6—C50.2 (5)C31—C30—C35—C341.1 (5)
C2—C1—C6—C7178.0 (3)C36—C30—C35—C34177.5 (3)
C19—N1—C7—C8173.3 (2)C48—N3—C36—C37179.1 (2)
C16—N1—C7—C853.3 (3)C45—N3—C36—C3758.4 (3)
C19—N1—C7—C662.3 (3)C48—N3—C36—C3056.0 (3)
C16—N1—C7—C6177.8 (2)C45—N3—C36—C30176.6 (2)
C5—C6—C7—N148.2 (4)C35—C30—C36—N3136.9 (3)
C1—C6—C7—N1134.1 (3)C31—C30—C36—N344.5 (4)
C5—C6—C7—C877.5 (3)C35—C30—C36—C3798.9 (3)
C1—C6—C7—C8100.2 (3)C31—C30—C36—C3779.7 (4)
N1—C7—C8—C9128.9 (3)N3—C36—C37—C3860.8 (4)
C6—C7—C8—C9107.0 (3)C30—C36—C37—C3863.5 (4)
N1—C7—C8—C1353.1 (4)N3—C36—C37—C42120.5 (3)
C6—C7—C8—C1371.1 (4)C30—C36—C37—C42115.1 (3)
C13—C8—C9—C101.9 (5)C42—C37—C38—C390.4 (5)
C7—C8—C9—C10176.4 (3)C36—C37—C38—C39179.1 (3)
C8—C9—C10—C111.2 (6)C37—C38—C39—C401.1 (5)
C15—O2—C11—C12174.8 (3)C44—O7—C40—C390.4 (5)
C15—O2—C11—C106.0 (5)C44—O7—C40—C41179.9 (3)
C9—C10—C11—O2178.8 (3)C38—C39—C40—O7179.7 (3)
C9—C10—C11—C120.5 (5)C38—C39—C40—C410.8 (5)
O2—C11—C12—C13178.7 (3)O7—C40—C41—C42179.5 (3)
C10—C11—C12—C130.7 (5)C39—C40—C41—C420.1 (5)
C11—C12—C13—C81.4 (5)C40—C41—C42—C370.8 (5)
C9—C8—C13—C121.9 (5)C38—C37—C42—C410.5 (5)
C7—C8—C13—C12176.2 (3)C36—C37—C42—C41178.2 (3)
C19—N1—C16—C1758.7 (3)C48—N3—C45—C4657.8 (3)
C7—N1—C16—C17179.8 (2)C36—N3—C45—C46179.6 (2)
C20—N2—C17—C16127.5 (3)C49—N4—C46—C45118.3 (3)
C18—N2—C17—C1653.0 (3)C47—N4—C46—C4554.5 (4)
N1—C16—C17—N256.2 (3)N3—C45—C46—N456.2 (3)
C20—N2—C18—C19127.6 (3)C49—N4—C47—C48117.6 (3)
C17—N2—C18—C1952.7 (4)C46—N4—C47—C4854.8 (4)
C16—N1—C19—C1859.7 (3)C45—N3—C48—C4758.8 (3)
C7—N1—C19—C18178.2 (2)C36—N3—C48—C47179.4 (2)
N2—C18—C19—N157.1 (4)N4—C47—C48—N357.8 (3)
C17—N2—C20—O3176.9 (3)C46—N4—C49—O82.7 (5)
C18—N2—C20—O33.6 (5)C47—N4—C49—O8174.3 (3)
C17—N2—C20—C211.7 (5)C46—N4—C49—C50175.8 (3)
C18—N2—C20—C21177.8 (3)C47—N4—C49—C504.2 (5)
O3—C20—C21—C2217.8 (5)O8—C49—C50—C5123.0 (5)
N2—C20—C21—C22160.8 (3)N4—C49—C50—C51155.5 (3)
C20—C21—C22—C23175.9 (3)C49—C50—C51—C52170.9 (3)
C21—C22—C23—C28170.3 (3)C50—C51—C52—C53173.9 (3)
C21—C22—C23—C247.0 (5)C50—C51—C52—C571.8 (5)
C28—C23—C24—C251.2 (4)C57—C52—C53—C540.2 (5)
C22—C23—C24—C25176.1 (3)C51—C52—C53—C54176.0 (3)
C23—C24—C25—O4178.3 (3)C52—C53—C54—C550.9 (5)
C23—C24—C25—C260.8 (5)C53—C54—C55—O10179.8 (3)
C29—O4—C25—C24177.8 (3)C53—C54—C55—C561.5 (5)
C29—O4—C25—C261.3 (4)C58—O10—C55—C54168.3 (3)
C29—O5—C26—C27178.9 (4)C58—O10—C55—C5612.8 (3)
C29—O5—C26—C250.1 (4)C54—C55—C56—C571.5 (5)
C24—C25—C26—C270.6 (5)O10—C55—C56—C57179.6 (3)
O4—C25—C26—C27179.9 (3)C54—C55—C56—O9178.3 (3)
C24—C25—C26—O5178.4 (3)O10—C55—C56—O90.6 (3)
O4—C25—C26—O50.8 (4)C58—O9—C56—C57166.4 (3)
O5—C26—C27—C28177.4 (3)C58—O9—C56—C5513.8 (3)
C25—C26—C27—C281.5 (5)C55—C56—C57—C520.8 (4)
C24—C23—C28—C270.4 (5)O9—C56—C57—C52179.0 (3)
C22—C23—C28—C27177.0 (3)C53—C52—C57—C560.1 (4)
C26—C27—C28—C231.0 (5)C51—C52—C57—C56175.8 (3)
C26—O5—C29—O40.9 (4)C55—O10—C58—O921.2 (3)
C25—O4—C29—O51.4 (4)C56—O9—C58—O1021.6 (3)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C29—H29A···O10i0.972.523.134 (5)121
C44—H44A···O6ii0.962.593.322 (5)134
C47—H47B···O4ii0.972.483.353 (5)149
C53—H53A···O5iii0.932.353.266 (4)169
Symmetry codes: (i) x, y+1, z+1; (ii) x+1, y, z; (iii) x+1, y+1, z.

Experimental details

Crystal data
Chemical formulaC29H30N2O5
Mr486.50
Crystal system, space groupTriclinic, P1
Temperature (K)293
a, b, c (Å)12.188 (2), 12.589 (3), 17.102 (3)
α, β, γ (°)76.52 (3), 84.10 (3), 89.95 (3)
V3)2537.5 (9)
Z4
Radiation typeMo Kα
µ (mm1)0.09
Crystal size (mm)0.30 × 0.20 × 0.20
Data collection
DiffractometerEnraf–Nonius CAD-4
diffractometer
Absorption correctionψ scan
(North et al., 1968)
Tmin, Tmax0.974, 0.983
No. of measured, independent and
observed [I > 2σ(I)] reflections
9818, 9340, 5434
Rint0.015
(sin θ/λ)max1)0.603
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.068, 0.193, 1.00
No. of reflections9340
No. of parameters649
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.21, 0.21

Computer programs: CAD-4 EXPRESS (Enraf–Nonius, 1994), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C29—H29A···O10i0.972.523.134 (5)121
C44—H44A···O6ii0.962.593.322 (5)134
C47—H47B···O4ii0.972.483.353 (5)149
C53—H53A···O5iii0.932.353.266 (4)169
Symmetry codes: (i) x, y+1, z+1; (ii) x+1, y, z; (iii) x+1, y+1, z.
 

Acknowledgements

The authors thank Professor Hua-Qin Wang of the Analysis Centre, Nanjing University, for the diffraction measurements. This work was supported by the Natural Science Foundation of Jiangsu Province (grant No. BK2010538).

References

First citationEnraf–Nonius (1994). CAD-4 EXPRESS. Enraf–Nonius, Delft, The Netherlands.  Google Scholar
First citationHarms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.  Google Scholar
First citationNorth, A. C. T., Phillips, D. C. & Mathews, F. S. (1968). Acta Cryst. A24, 351–359.  CrossRef IUCr Journals Web of Science Google Scholar
First citationSheldrick, G. M. (2008). Acta Cryst. A64, 112–122.  Web of Science CrossRef CAS IUCr Journals Google Scholar
First citationTeng, Y.-B., Dai, Z.-H. & Wu, B. (2011). Acta Cryst. E67, o697.  Web of Science CSD CrossRef IUCr Journals Google Scholar
First citationWu, B., Zhou, L. & Cai, H.-H. (2008). Chin. Chem. Lett. 19, 1163–1166.  Web of Science CrossRef CAS Google Scholar
First citationZhong, Y., Zhang, X. P. & Wu, B. (2012). Acta Cryst. E68, o298.  Web of Science CSD CrossRef IUCr Journals Google Scholar

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