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Acta Crystallographica Section E: Structure Reports Online logoLink to Acta Crystallographica Section E: Structure Reports Online
. 2011 Sep 30;67(Pt 10):o2728. doi: 10.1107/S1600536811035185

rac-3-{4-[(Furan-2-ylmethyl­idene)­amino]-3-methyl-5-sulfanyl­idene-4,5-dihydro-1H-1,2,4-triazol-1-yl}-1,3-diphenyl­propan-1-one

Wei Wang a,b,*, Yan Gao b, Wen-peng Wu b, Chao Xu b, Qing-lei Liu a
PMCID: PMC3201430  PMID: 22064809

Abstract

In the title mol­ecule, C23H20N4O2S, the triazole ring forms dihedral angles of 150.3 (2), 77.3 (2) and 77.6 (2)°, respectively, with the furan ring and the phenyl rings. The furan ring is almost perpendicular to the central phenyl ring, making a dihedral angle of 86.0 (3)°.

Related literature

For the crystal structures of related 1,2,4-triazole-5(4H)-thione derivatives, see: Al-Tamimi et al. (2010); Fun et al. (2009); Gao et al. (2011); Tan et al. (2010); Wang et al. (2011); Zhao et al. (2010).graphic file with name e-67-o2728-scheme1.jpg

Experimental

Crystal data

  • C23H20N4O2S

  • M r = 416.50

  • Monoclinic, Inline graphic

  • a = 8.154 (3) Å

  • b = 21.194 (6) Å

  • c = 12.878 (4) Å

  • β = 107.965 (5)°

  • V = 2117.0 (12) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.18 mm−1

  • T = 113 K

  • 0.24 × 0.20 × 0.12 mm

Data collection

  • Rigaku Saturn CCD area-detector diffractometer

  • Absorption correction: multi-scan (CrystalClear; Rigaku/MSC, 2005) T min = 0.958, T max = 0.979

  • 26979 measured reflections

  • 5030 independent reflections

  • 4229 reflections with I > 2σ(I)

  • R int = 0.043

Refinement

  • R[F 2 > 2σ(F 2)] = 0.040

  • wR(F 2) = 0.106

  • S = 1.07

  • 5030 reflections

  • 272 parameters

  • H-atom parameters constrained

  • Δρmax = 0.33 e Å−3

  • Δρmin = −0.18 e Å−3

Data collection: CrystalClear (Rigaku/MSC, 2005); cell refinement: CrystalClear; data reduction: CrystalClear; 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.

Supplementary Material

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536811035185/zs2141sup1.cif

e-67-o2728-sup1.cif (21.9KB, cif)

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536811035185/zs2141Isup2.hkl

e-67-o2728-Isup2.hkl (246.4KB, hkl)

Supplementary material file. DOI: 10.1107/S1600536811035185/zs2141Isup3.cml

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Acknowledgments

We gratefully acknowledge support of this study by the Key Laboratory Project of Liaoning Province (No. 2008S127) and the Doctoral Starting Foundation of Liaoning Province (No. 20071103).

supplementary crystallographic information

Comment

In a continuation of structural studies by our group (Wang et al., 2011) of Mannich base derivatives synthesized by reactions of amino heterocycles and aromatic aldehydes, we present here the crystal structure of the title compound, C23H20N4O2S.

The bond lengths and angles in this compound are found to have values comparable with those reported in related 1,2,4-triazole- 5(4H)-thione derivatives (Al-Tamimi et al., 2010; Fun et al. (2009); Tan et al. (2010); Wang et al., 2011;). The C1 and C2 atoms in the 1,2,4-triazole ring show distorted Csp2 hybridization states with bond angles of 102.03 (10)° (N1—C1—N3), 131.01 (9)° (N3—C1—S1), 110.81 (11)° (N2—C2—N3) and 125.29 (12) ° (N2—C2—C23), which are similar to those in other reported triazole derivatives (Zhao et al., 2010; Gao et al., 2011). The 1,2,4-triazole ring forms dihedral angles of 150.3 (2), 77.3 (2) and 77.6 (2)° with the furan ring and the phenyl rings, respectively. The furan ring is almost perpendicular to the C12—C17 phenyl ring, with a dihedral angle of 94.0 (3)°.

Experimental

The title compound was synthesized in the reaction of 2-furfural (2.0 mmol) with 3-(4-amino-3-methyl-5-thioxo-4,5- dihydro-1H-1,2,4-triazol-1-yl)-1,3-diphenylpropan-1-one (2.0 mmol), by refluxing in ethanol. The reaction progress was monitored via TLC. The resulting precipitate was filtered off, washed with cold ethanol, dried and purified to give the target product as a colorless solid in 75% yield. Crystals suitable for single-crystal X-ray analysis were grown by slow evaporation of a solution in chloroform–ethanol (1:1).

Refinement

Hydrogen atoms were positioned geometrically and refined as riding (C—H = 0.95–1.00 Å) and allowed to ride on their parent atoms, with Uiso(H) = 1.2Ueq(C).

Figures

Fig. 1.

Fig. 1.

A view of the molecule of the title compound showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 60% probability level.

Crystal data

C23H20N4O2S F(000) = 872
Mr = 416.50 Dx = 1.307 Mg m3
Monoclinic, P21/c Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc Cell parameters from 7435 reflections
a = 8.154 (3) Å θ = 1.7–27.9°
b = 21.194 (6) Å µ = 0.18 mm1
c = 12.878 (4) Å T = 113 K
β = 107.965 (5)° Prism, colorless
V = 2117.0 (12) Å3 0.24 × 0.20 × 0.12 mm
Z = 4

Data collection

Rigaku Saturn CCD area-detector diffractometer 5030 independent reflections
Radiation source: rotating anode 4229 reflections with I > 2σ(I)
multilayer Rint = 0.043
Detector resolution: 14.63 pixels mm-1 θmax = 27.9°, θmin = 1.9°
φ and ω scans h = −10→10
Absorption correction: multi-scan (CrystalClear; Rigaku/MSC, 2005) k = −27→27
Tmin = 0.958, Tmax = 0.979 l = −16→16
26979 measured reflections

Refinement

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)] = 0.040 Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.106 H-atom parameters constrained
S = 1.07 w = 1/[σ2(Fo2) + (0.0597P)2 + 0.0507P] where P = (Fo2 + 2Fc2)/3
5030 reflections (Δ/σ)max = 0.001
272 parameters Δρmax = 0.33 e Å3
0 restraints Δρmin = −0.18 e Å3

Special details

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)

x y z Uiso*/Ueq
S1 1.09278 (4) 0.678722 (17) 0.64588 (3) 0.03095 (11)
O1 0.74128 (14) 0.76825 (5) 0.75402 (7) 0.0366 (2)
O2 0.80256 (13) 0.49556 (5) 0.33988 (7) 0.0370 (2)
N1 0.89702 (13) 0.64352 (5) 0.77200 (8) 0.0210 (2)
N2 0.76948 (13) 0.60222 (5) 0.77821 (8) 0.0258 (2)
N3 0.82733 (13) 0.59160 (5) 0.62302 (8) 0.0231 (2)
N4 0.81208 (14) 0.55961 (5) 0.52572 (8) 0.0287 (3)
C1 0.93901 (15) 0.63862 (6) 0.67870 (9) 0.0215 (3)
C2 0.73025 (17) 0.57115 (6) 0.68692 (10) 0.0265 (3)
C3 0.98664 (16) 0.68280 (6) 0.86642 (9) 0.0231 (3)
H3 1.0421 0.7187 0.8396 0.028*
C4 0.85808 (17) 0.71013 (6) 0.91857 (10) 0.0272 (3)
H4A 0.7942 0.6751 0.9394 0.033*
H4B 0.9219 0.7329 0.9861 0.033*
C5 0.73023 (17) 0.75493 (6) 0.84367 (10) 0.0265 (3)
C6 0.59252 (16) 0.78340 (6) 0.88329 (10) 0.0254 (3)
C7 0.45618 (19) 0.81411 (6) 0.80761 (12) 0.0339 (3)
H7 0.4509 0.8154 0.7329 0.041*
C8 0.3287 (2) 0.84270 (7) 0.84094 (13) 0.0431 (4)
H8 0.2349 0.8630 0.7889 0.052*
C9 0.3374 (2) 0.84195 (7) 0.95004 (13) 0.0414 (4)
H9 0.2509 0.8625 0.9729 0.050*
C10 0.47170 (19) 0.81126 (6) 1.02590 (12) 0.0327 (3)
H10 0.4766 0.8104 1.1005 0.039*
C11 0.59897 (17) 0.78178 (6) 0.99299 (10) 0.0275 (3)
H11 0.6907 0.7605 1.0450 0.033*
C12 1.12820 (16) 0.64429 (6) 0.94503 (9) 0.0234 (3)
C13 1.08906 (17) 0.59523 (6) 1.00540 (10) 0.0288 (3)
H13 0.9722 0.5870 1.0001 0.035*
C14 1.21854 (18) 0.55835 (7) 1.07314 (11) 0.0325 (3)
H14 1.1904 0.5249 1.1137 0.039*
C15 1.38920 (18) 0.57036 (7) 1.08172 (11) 0.0373 (3)
H15 1.4783 0.5452 1.1281 0.045*
C16 1.42945 (18) 0.61911 (7) 1.02258 (12) 0.0401 (4)
H16 1.5466 0.6274 1.0287 0.048*
C17 1.30023 (17) 0.65601 (7) 0.95437 (11) 0.0314 (3)
H17 1.3291 0.6894 0.9139 0.038*
C18 0.86294 (17) 0.58860 (7) 0.45364 (10) 0.0296 (3)
H18 0.9078 0.6302 0.4672 0.036*
C19 0.85153 (17) 0.55772 (7) 0.35217 (10) 0.0309 (3)
C20 0.87864 (18) 0.57953 (8) 0.26002 (11) 0.0385 (3)
H20 0.9137 0.6209 0.2477 0.046*
C21 0.84408 (19) 0.52813 (8) 0.18528 (12) 0.0420 (4)
H21 0.8514 0.5284 0.1131 0.050*
C22 0.79925 (19) 0.47929 (8) 0.23657 (11) 0.0410 (4)
H22 0.7691 0.4387 0.2053 0.049*
C23 0.5960 (2) 0.52161 (7) 0.65264 (11) 0.0430 (4)
H23A 0.5505 0.5122 0.7130 0.064*
H23B 0.6465 0.4833 0.6326 0.064*
H23C 0.5023 0.5366 0.5896 0.064*

Atomic displacement parameters (Å2)

U11 U22 U33 U12 U13 U23
S1 0.02698 (19) 0.0442 (2) 0.02233 (18) −0.00676 (14) 0.00865 (14) 0.00319 (14)
O1 0.0485 (6) 0.0389 (5) 0.0253 (5) 0.0118 (5) 0.0157 (5) 0.0049 (4)
O2 0.0429 (6) 0.0387 (5) 0.0242 (5) 0.0133 (5) 0.0029 (4) −0.0078 (4)
N1 0.0226 (5) 0.0225 (5) 0.0178 (5) −0.0028 (4) 0.0064 (4) −0.0018 (4)
N2 0.0259 (6) 0.0297 (6) 0.0211 (5) −0.0072 (4) 0.0063 (4) 0.0013 (4)
N3 0.0281 (6) 0.0235 (5) 0.0160 (5) −0.0001 (4) 0.0043 (4) −0.0017 (4)
N4 0.0341 (6) 0.0309 (6) 0.0172 (5) 0.0061 (5) 0.0023 (4) −0.0055 (4)
C1 0.0229 (6) 0.0241 (6) 0.0166 (6) 0.0029 (5) 0.0046 (5) 0.0011 (5)
C2 0.0301 (7) 0.0274 (6) 0.0192 (6) −0.0050 (5) 0.0035 (5) 0.0027 (5)
C3 0.0271 (7) 0.0229 (6) 0.0183 (6) −0.0037 (5) 0.0055 (5) −0.0036 (5)
C4 0.0339 (7) 0.0273 (7) 0.0195 (6) 0.0040 (6) 0.0069 (5) −0.0033 (5)
C5 0.0323 (7) 0.0236 (6) 0.0222 (6) −0.0004 (5) 0.0063 (5) −0.0041 (5)
C6 0.0275 (7) 0.0218 (6) 0.0263 (6) −0.0025 (5) 0.0074 (5) −0.0016 (5)
C7 0.0347 (8) 0.0358 (7) 0.0308 (7) 0.0035 (6) 0.0097 (6) 0.0065 (6)
C8 0.0360 (8) 0.0490 (9) 0.0460 (9) 0.0126 (7) 0.0153 (7) 0.0151 (7)
C9 0.0392 (9) 0.0420 (8) 0.0509 (9) 0.0085 (7) 0.0255 (8) 0.0075 (7)
C10 0.0379 (8) 0.0320 (7) 0.0327 (7) −0.0012 (6) 0.0175 (6) −0.0010 (6)
C11 0.0304 (7) 0.0251 (6) 0.0263 (6) −0.0038 (5) 0.0078 (5) −0.0023 (5)
C12 0.0257 (6) 0.0235 (6) 0.0197 (6) −0.0018 (5) 0.0051 (5) −0.0053 (5)
C13 0.0259 (7) 0.0316 (7) 0.0276 (7) −0.0014 (5) 0.0064 (5) 0.0006 (5)
C14 0.0349 (8) 0.0333 (7) 0.0270 (7) 0.0004 (6) 0.0059 (6) 0.0043 (6)
C15 0.0300 (7) 0.0457 (8) 0.0307 (7) 0.0070 (6) 0.0013 (6) 0.0049 (6)
C16 0.0231 (7) 0.0558 (10) 0.0374 (8) −0.0030 (7) 0.0035 (6) 0.0030 (7)
C17 0.0293 (7) 0.0355 (7) 0.0268 (7) −0.0071 (6) 0.0052 (6) −0.0001 (6)
C18 0.0312 (7) 0.0346 (7) 0.0203 (6) 0.0082 (6) 0.0038 (5) −0.0023 (5)
C19 0.0271 (7) 0.0390 (7) 0.0233 (6) 0.0104 (6) 0.0026 (5) −0.0044 (6)
C20 0.0343 (8) 0.0556 (9) 0.0252 (7) 0.0017 (7) 0.0086 (6) −0.0073 (6)
C21 0.0342 (8) 0.0678 (11) 0.0231 (7) 0.0116 (8) 0.0073 (6) −0.0102 (7)
C22 0.0372 (8) 0.0515 (9) 0.0266 (7) 0.0192 (7) −0.0012 (6) −0.0157 (7)
C23 0.0523 (10) 0.0433 (9) 0.0259 (7) −0.0241 (7) 0.0012 (7) 0.0018 (6)

Geometric parameters (Å, °)

S1—C1 1.6734 (13) C9—H9 0.9500
O1—C5 1.2185 (15) C10—C11 1.3851 (19)
O2—C22 1.3666 (16) C10—H10 0.9500
O2—C19 1.3715 (18) C11—H11 0.9500
N1—C1 1.3511 (15) C12—C17 1.3927 (18)
N1—N2 1.3803 (14) C12—C13 1.3930 (18)
N1—C3 1.4688 (15) C13—C14 1.3852 (19)
N2—C2 1.2984 (16) C13—H13 0.9500
N3—C2 1.3760 (16) C14—C15 1.385 (2)
N3—C1 1.3906 (15) C14—H14 0.9500
N3—N4 1.3961 (14) C15—C16 1.382 (2)
N4—C18 1.2840 (17) C15—H15 0.9500
C2—C23 1.4823 (18) C16—C17 1.387 (2)
C3—C12 1.5174 (17) C16—H16 0.9500
C3—C4 1.5232 (17) C17—H17 0.9500
C3—H3 1.0000 C18—C19 1.4386 (18)
C4—C5 1.5160 (18) C18—H18 0.9500
C4—H4A 0.9900 C19—C20 1.354 (2)
C4—H4B 0.9900 C20—C21 1.423 (2)
C5—C6 1.4961 (18) C20—H20 0.9500
C6—C7 1.3932 (19) C21—C22 1.338 (2)
C6—C11 1.3978 (17) C21—H21 0.9500
C7—C8 1.381 (2) C22—H22 0.9500
C7—H7 0.9500 C23—H23A 0.9800
C8—C9 1.385 (2) C23—H23B 0.9800
C8—H8 0.9500 C23—H23C 0.9800
C9—C10 1.385 (2)
C22—O2—C19 105.81 (11) C11—C10—H10 120.0
C1—N1—N2 113.88 (10) C10—C11—C6 120.00 (13)
C1—N1—C3 125.58 (10) C10—C11—H11 120.0
N2—N1—C3 120.19 (9) C6—C11—H11 120.0
C2—N2—N1 104.40 (10) C17—C12—C13 118.88 (12)
C2—N3—C1 108.86 (10) C17—C12—C3 120.02 (11)
C2—N3—N4 118.39 (10) C13—C12—C3 121.05 (11)
C1—N3—N4 132.36 (10) C14—C13—C12 120.76 (13)
C18—N4—N3 117.20 (11) C14—C13—H13 119.6
N1—C1—N3 102.03 (10) C12—C13—H13 119.6
N1—C1—S1 126.93 (9) C15—C14—C13 119.89 (13)
N3—C1—S1 131.01 (9) C15—C14—H14 120.1
N2—C2—N3 110.81 (11) C13—C14—H14 120.1
N2—C2—C23 125.59 (12) C16—C15—C14 119.81 (13)
N3—C2—C23 123.58 (11) C16—C15—H15 120.1
N1—C3—C12 109.22 (9) C14—C15—H15 120.1
N1—C3—C4 110.25 (10) C15—C16—C17 120.51 (13)
C12—C3—C4 113.31 (10) C15—C16—H16 119.7
N1—C3—H3 108.0 C17—C16—H16 119.7
C12—C3—H3 108.0 C16—C17—C12 120.16 (13)
C4—C3—H3 108.0 C16—C17—H17 119.9
C5—C4—C3 112.91 (10) C12—C17—H17 119.9
C5—C4—H4A 109.0 N4—C18—C19 119.61 (13)
C3—C4—H4A 109.0 N4—C18—H18 120.2
C5—C4—H4B 109.0 C19—C18—H18 120.2
C3—C4—H4B 109.0 C20—C19—O2 110.32 (12)
H4A—C4—H4B 107.8 C20—C19—C18 131.19 (14)
O1—C5—C6 120.81 (12) O2—C19—C18 118.48 (12)
O1—C5—C4 120.71 (12) C19—C20—C21 106.23 (14)
C6—C5—C4 118.47 (11) C19—C20—H20 126.9
C7—C6—C11 119.45 (12) C21—C20—H20 126.9
C7—C6—C5 118.08 (11) C22—C21—C20 106.60 (13)
C11—C6—C5 122.44 (12) C22—C21—H21 126.7
C8—C7—C6 120.15 (13) C20—C21—H21 126.7
C8—C7—H7 119.9 C21—C22—O2 111.03 (13)
C6—C7—H7 119.9 C21—C22—H22 124.5
C7—C8—C9 120.18 (14) O2—C22—H22 124.5
C7—C8—H8 119.9 C2—C23—H23A 109.5
C9—C8—H8 119.9 C2—C23—H23B 109.5
C10—C9—C8 120.17 (13) H23A—C23—H23B 109.5
C10—C9—H9 119.9 C2—C23—H23C 109.5
C8—C9—H9 119.9 H23A—C23—H23C 109.5
C9—C10—C11 120.03 (13) H23B—C23—H23C 109.5
C9—C10—H10 120.0
C1—N1—N2—C2 −0.35 (13) C11—C6—C7—C8 0.0 (2)
C3—N1—N2—C2 −173.97 (11) C5—C6—C7—C8 −178.09 (13)
C2—N3—N4—C18 160.90 (12) C6—C7—C8—C9 1.1 (2)
C1—N3—N4—C18 −27.24 (19) C7—C8—C9—C10 −1.5 (2)
N2—N1—C1—N3 0.93 (13) C8—C9—C10—C11 0.7 (2)
C3—N1—C1—N3 174.15 (10) C9—C10—C11—C6 0.5 (2)
N2—N1—C1—S1 −177.18 (9) C7—C6—C11—C10 −0.84 (19)
C3—N1—C1—S1 −3.96 (17) C5—C6—C11—C10 177.21 (12)
C2—N3—C1—N1 −1.14 (13) N1—C3—C12—C17 106.97 (13)
N4—N3—C1—N1 −173.59 (11) C4—C3—C12—C17 −129.70 (12)
C2—N3—C1—S1 176.86 (10) N1—C3—C12—C13 −70.35 (14)
N4—N3—C1—S1 4.4 (2) C4—C3—C12—C13 52.98 (15)
N1—N2—C2—N3 −0.43 (14) C17—C12—C13—C14 −0.41 (18)
N1—N2—C2—C23 −178.64 (13) C3—C12—C13—C14 176.94 (11)
C1—N3—C2—N2 1.04 (15) C12—C13—C14—C15 0.3 (2)
N4—N3—C2—N2 174.70 (10) C13—C14—C15—C16 0.0 (2)
C1—N3—C2—C23 179.29 (12) C14—C15—C16—C17 −0.2 (2)
N4—N3—C2—C23 −7.05 (18) C15—C16—C17—C12 0.1 (2)
C1—N1—C3—C12 −90.83 (13) C13—C12—C17—C16 0.19 (19)
N2—N1—C3—C12 81.99 (13) C3—C12—C17—C16 −177.19 (12)
C1—N1—C3—C4 144.04 (11) N3—N4—C18—C19 179.51 (11)
N2—N1—C3—C4 −43.14 (14) C22—O2—C19—C20 −0.25 (15)
N1—C3—C4—C5 −64.25 (13) C22—O2—C19—C18 178.72 (11)
C12—C3—C4—C5 172.98 (10) N4—C18—C19—C20 172.22 (14)
C3—C4—C5—O1 −3.40 (17) N4—C18—C19—O2 −6.51 (19)
C3—C4—C5—C6 177.83 (11) O2—C19—C20—C21 0.22 (16)
O1—C5—C6—C7 13.79 (19) C18—C19—C20—C21 −178.59 (14)
C4—C5—C6—C7 −167.44 (12) C19—C20—C21—C22 −0.10 (16)
O1—C5—C6—C11 −164.29 (12) C20—C21—C22—O2 −0.06 (17)
C4—C5—C6—C11 14.49 (18) C19—O2—C22—C21 0.19 (15)

Footnotes

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZS2141).

References

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Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536811035185/zs2141sup1.cif

e-67-o2728-sup1.cif (21.9KB, cif)

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536811035185/zs2141Isup2.hkl

e-67-o2728-Isup2.hkl (246.4KB, hkl)

Supplementary material file. DOI: 10.1107/S1600536811035185/zs2141Isup3.cml

Additional supplementary materials: crystallographic information; 3D view; checkCIF report


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