Literature DB >> 26870512

Crystal structure of methyl (2Z)-2-{[N-(2-formyl-phen-yl)-4-methyl-benzene-sulfonamido]-meth-yl}-3-(4-meth-oxy-phen-yl)prop-2-enoate.

Ankur Trigunait1, Kannan Damodharan2, Bakthadoss Manickam2, Gunasekaran Krishnasamy2.   

Abstract

In the title compound, C26H25NO6S, the S atom shows a distorted tetra-hedral geometry, with O-S-O [119.46 (9)°] and N-S-C [107.16 (7)°] angles deviating from ideal tetra-hedral values, a fact attributed to the Thorpe-Ingold effect. The sulfonyl-bound phenyl ring forms dihedral angles of 41.1 (1) and 83.3 (1)°, respectively, with the formyl-phenyl and phenyl rings. The dihedral angle between formyl-phenyl and phenyl rings is 47.6 (1)°. The crystal packing features C-H⋯O hydrogen-bond inter-actions.

Entities:  

Keywords:  Thorpe–Ingold effect; crystal structure; sulfonamide

Year:  2015        PMID: 26870512      PMCID: PMC4719993          DOI: 10.1107/S2056989015024172

Source DB:  PubMed          Journal:  Acta Crystallogr E Crystallogr Commun


Related literature

For background to the pharmacological uses of sulfonamides, see: Korolkovas et al. (1988 ▸); Mandell & Sande (1992 ▸). For the anti­filarial activity of sulfonamide derivatives, see: Radembino et al. (1997 ▸); For related structures, see: Ranjith et al. (2009 ▸); Madhanraj et al. (2011 ▸). For the Thorpe–Ingold effect, see: Bassindale et al. (1984 ▸).

Experimental

Crystal data

C26H25NO6S M = 479.53 Triclinic, a = 8.3501 (2) Å b = 8.4859 (2) Å c = 17.6814 (4) Å α = 84.424 (1)° β = 80.952 (1)° γ = 80.954 (1)° V = 1218.52 (5) Å3 Z = 2 Mo Kα radiation μ = 0.17 mm−1 T = 293 K 0.25 × 0.20 × 0.20 mm

Data collection

Bruker Kappa APEXII CCD diffractometer Absorption correction: multi-scan (SADABS; Bruker 2004 ▸) T min = 0.979, T max = 0.983 23816 measured reflections 5519 independent reflections 4232 reflections with I > 2σ(I) R int = 0.028

Refinement

R[F 2 > 2σ(F 2)] = 0.044 wR(F 2) = 0.135 S = 1.02 5519 reflections 314 parameters 13 restraints H-atom parameters constrained Δρmax = 0.34 e Å−3 Δρmin = −0.36 e Å−3

Data collection: APEX2 (Bruker, 2004 ▸); cell refinement: APEX2 and SAINT (Bruker, 2004 ▸); data reduction: SAINT and XPREP (Bruker, 2004 ▸); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▸); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015 ▸); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012 ▸); software used to prepare material for publication: PLATON (Spek, 2009 ▸). Crystal structure: contains datablock(s) I, 2R. DOI: 10.1107/S2056989015024172/bg2572sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989015024172/bg2572Isup2.hkl Click here for additional data file. Supporting information file. DOI: 10.1107/S2056989015024172/bg2572Isup3.cml Click here for additional data file. . DOI: 10.1107/S2056989015024172/bg2572fig1.tif The mol­ecular structure of the title compound showing 30% probability displacement ellipsoids for non-H atoms Click here for additional data file. . DOI: 10.1107/S2056989015024172/bg2572fig2.tif Crystal packing diagram. H atoms not involved in hydrogen bonding (dashed lines) have been omitted for clarity. CCDC reference: 1442750 Additional supporting information: crystallographic information; 3D view; checkCIF report
C26H25NO6SZ = 2
Mr = 479.53F(000) = 504
Triclinic, P1Dx = 1.307 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 8.3501 (2) ÅCell parameters from 8834 reflections
b = 8.4859 (2) Åθ = 2.6–31.2°
c = 17.6814 (4) ŵ = 0.17 mm1
α = 84.424 (1)°T = 293 K
β = 80.952 (1)°Block, colourless
γ = 80.954 (1)°0.25 × 0.20 × 0.20 mm
V = 1218.52 (5) Å3
Bruker Kappa APEXII CCD diffractometer5519 independent reflections
Radiation source: fine-focus sealed tube4232 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.028
ω and φ scanθmax = 27.5°, θmin = 2.3°
Absorption correction: multi-scan (SADABS; Bruker 2004)h = −10→10
Tmin = 0.979, Tmax = 0.983k = −11→11
23816 measured reflectionsl = −22→22
Refinement on F213 restraints
Least-squares matrix: fullHydrogen site location: mixed
R[F2 > 2σ(F2)] = 0.044H-atom parameters constrained
wR(F2) = 0.135w = 1/[σ2(Fo2) + (0.0713P)2 + 0.275P] where P = (Fo2 + 2Fc2)/3
S = 1.02(Δ/σ)max < 0.001
5519 reflectionsΔρmax = 0.34 e Å3
314 parametersΔρmin = −0.36 e Å3
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 > 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.
xyzUiso*/UeqOcc. (<1)
S10.89631 (5)0.51292 (5)0.33325 (2)0.04835 (15)
O1A1.4384 (2)0.5552 (4)0.2246 (2)0.1151 (13)0.740 (4)
H7A1.22770.50120.22670.080*0.740 (4)
O1B1.3729 (9)0.4953 (8)0.2764 (4)0.1151 (13)0.260 (4)
H7B1.23650.54600.19460.080*0.260 (4)
O20.82045 (18)0.40111 (14)0.30104 (8)0.0609 (4)
O31.04550 (18)0.46004 (16)0.36347 (8)0.0696 (4)
O41.35510 (18)0.15273 (16)0.03718 (9)0.0700 (4)
O50.83811 (19)1.06484 (15)0.08082 (8)0.0693 (4)
O60.66997 (15)1.02738 (14)0.18898 (7)0.0565 (3)
N10.93431 (15)0.65272 (14)0.26408 (7)0.0379 (3)
C11.03147 (19)0.76893 (18)0.27928 (9)0.0396 (3)
C20.9569 (2)0.9142 (2)0.30551 (11)0.0525 (4)
H20.84320.93620.31490.063*
C31.0505 (3)1.0272 (2)0.31794 (13)0.0677 (6)
H30.99961.12530.33520.081*
C41.2173 (3)0.9952 (3)0.30501 (14)0.0720 (6)
H41.28011.07100.31390.086*
C51.2920 (2)0.8516 (3)0.27898 (12)0.0651 (5)
H51.40590.83070.27030.078*
C61.2016 (2)0.7363 (2)0.26528 (10)0.0494 (4)
C71.2889 (2)0.5845 (3)0.23465 (13)0.0674 (6)
C80.7539 (2)0.6044 (2)0.40537 (9)0.0493 (4)
C90.5901 (2)0.6237 (2)0.39958 (11)0.0587 (5)
H90.55350.58550.35880.070*
C100.4797 (3)0.7018 (3)0.45622 (13)0.0703 (6)
H100.36820.71650.45280.084*
C110.5324 (3)0.7579 (2)0.51727 (12)0.0702 (6)
C120.6966 (4)0.7339 (3)0.52188 (13)0.0793 (7)
H120.73330.76910.56340.095*
C130.8076 (3)0.6594 (3)0.46667 (11)0.0678 (6)
H130.91900.64570.47030.081*
C140.4101 (4)0.8423 (3)0.57835 (16)0.1047 (10)
H14A0.30530.86830.56080.157*
H14B0.44730.93880.58820.157*
H14C0.40020.77340.62470.157*
C150.79663 (18)0.71501 (18)0.22006 (9)0.0401 (3)
H15A0.71470.78560.25090.048*
H15B0.74550.62650.20890.048*
C160.85673 (19)0.80473 (18)0.14613 (9)0.0392 (3)
C170.9703 (2)0.74544 (19)0.08975 (9)0.0430 (4)
H170.99410.81960.04880.052*
C181.0633 (2)0.58688 (19)0.08059 (9)0.0424 (4)
C191.2034 (2)0.5730 (2)0.02594 (10)0.0524 (4)
H191.23340.6645−0.00270.063*
C201.2982 (2)0.4287 (2)0.01316 (12)0.0587 (5)
H201.39200.4232−0.02320.070*
C211.2547 (2)0.2907 (2)0.05425 (11)0.0507 (4)
C221.1149 (2)0.2998 (2)0.10759 (10)0.0521 (4)
H221.08400.20760.13510.062*
C231.0211 (2)0.4462 (2)0.12001 (10)0.0489 (4)
H230.92650.45100.15590.059*
C241.3116 (3)0.0075 (2)0.07567 (14)0.0790 (7)
H24A1.3916−0.08030.05800.119*
H24B1.2059−0.00710.06500.119*
H24C1.30800.01170.13000.119*
C250.7907 (2)0.97716 (19)0.13359 (9)0.0445 (4)
C260.6048 (3)1.1955 (2)0.18269 (14)0.0693 (6)
H26A0.51971.21900.22500.104*
H26B0.56071.22110.13530.104*
H26C0.69081.25790.18360.104*
U11U22U33U12U13U23
S10.0578 (3)0.0350 (2)0.0469 (2)0.00262 (17)−0.00629 (19)0.00590 (16)
O1A0.0336 (12)0.118 (2)0.199 (3)0.0111 (12)−0.0125 (15)−0.082 (2)
O1B0.0336 (12)0.118 (2)0.199 (3)0.0111 (12)−0.0125 (15)−0.082 (2)
O20.0854 (10)0.0349 (6)0.0604 (8)−0.0140 (6)−0.0004 (7)−0.0018 (5)
O30.0716 (9)0.0610 (8)0.0674 (8)0.0168 (7)−0.0208 (7)0.0137 (7)
O40.0663 (9)0.0500 (7)0.0866 (10)0.0013 (6)0.0017 (8)−0.0059 (7)
O50.0902 (10)0.0450 (7)0.0628 (8)−0.0074 (7)0.0068 (7)0.0127 (6)
O60.0576 (8)0.0441 (6)0.0602 (8)0.0031 (5)−0.0009 (6)0.0047 (6)
N10.0368 (7)0.0346 (6)0.0406 (7)−0.0006 (5)−0.0064 (5)0.0006 (5)
C10.0417 (8)0.0379 (7)0.0383 (8)−0.0002 (6)−0.0089 (6)−0.0023 (6)
C20.0524 (10)0.0443 (9)0.0589 (11)0.0044 (7)−0.0095 (8)−0.0106 (8)
C30.0856 (16)0.0428 (10)0.0773 (14)−0.0027 (9)−0.0198 (12)−0.0158 (9)
C40.0803 (16)0.0650 (13)0.0815 (15)−0.0261 (11)−0.0252 (12)−0.0128 (11)
C50.0493 (11)0.0781 (14)0.0737 (13)−0.0138 (10)−0.0171 (10)−0.0125 (11)
C60.0417 (9)0.0550 (10)0.0522 (10)0.0012 (7)−0.0134 (8)−0.0104 (8)
C70.0425 (10)0.0754 (13)0.0857 (15)0.0117 (9)−0.0194 (10)−0.0296 (11)
C80.0617 (11)0.0423 (8)0.0395 (9)−0.0038 (7)−0.0039 (8)0.0074 (7)
C90.0653 (12)0.0546 (10)0.0525 (10)−0.0110 (9)−0.0007 (9)0.0058 (8)
C100.0643 (13)0.0620 (12)0.0742 (14)−0.0079 (10)0.0090 (11)0.0136 (10)
C110.0995 (18)0.0490 (10)0.0504 (11)−0.0066 (11)0.0152 (11)0.0061 (9)
C120.111 (2)0.0733 (14)0.0500 (12)−0.0041 (13)−0.0071 (12)−0.0084 (10)
C130.0805 (15)0.0700 (13)0.0512 (11)−0.0029 (11)−0.0138 (10)−0.0026 (10)
C140.134 (2)0.0742 (16)0.0836 (17)−0.0069 (16)0.0461 (17)−0.0058 (14)
C150.0339 (8)0.0409 (8)0.0436 (8)−0.0044 (6)−0.0060 (6)0.0047 (6)
C160.0403 (8)0.0395 (8)0.0402 (8)−0.0108 (6)−0.0108 (7)0.0022 (6)
C170.0499 (9)0.0417 (8)0.0394 (8)−0.0138 (7)−0.0086 (7)0.0019 (6)
C180.0479 (9)0.0440 (8)0.0383 (8)−0.0126 (7)−0.0085 (7)−0.0042 (6)
C190.0540 (10)0.0483 (9)0.0529 (10)−0.0127 (8)0.0003 (8)0.0023 (8)
C200.0481 (10)0.0584 (11)0.0652 (12)−0.0090 (8)0.0068 (9)−0.0041 (9)
C210.0499 (10)0.0464 (9)0.0566 (10)−0.0042 (7)−0.0105 (8)−0.0086 (8)
C220.0659 (12)0.0416 (8)0.0501 (10)−0.0156 (8)−0.0054 (8)−0.0033 (7)
C230.0554 (10)0.0464 (9)0.0452 (9)−0.0158 (7)0.0026 (8)−0.0075 (7)
C240.0998 (18)0.0466 (11)0.0829 (15)−0.0004 (11)0.0001 (13)−0.0043 (10)
C250.0486 (9)0.0414 (8)0.0442 (9)−0.0079 (7)−0.0102 (7)0.0013 (7)
C260.0743 (14)0.0447 (10)0.0818 (14)0.0054 (9)−0.0061 (11)−0.0011 (9)
S1—O31.4233 (14)C11—C121.368 (3)
S1—O21.4259 (14)C11—C141.515 (3)
S1—N11.6486 (13)C12—C131.365 (3)
S1—C81.7517 (18)C12—H120.9300
O1A—C71.222 (3)C13—H130.9300
O1B—C71.223 (3)C14—H14A0.9600
O4—C211.359 (2)C14—H14B0.9600
O4—C241.419 (3)C14—H14C0.9600
O5—C251.193 (2)C15—C161.504 (2)
O6—C251.339 (2)C15—H15A0.9700
O6—C261.445 (2)C15—H15B0.9700
N1—C11.440 (2)C16—C171.340 (2)
N1—C151.4891 (18)C16—C251.489 (2)
C1—C21.379 (2)C17—C181.454 (2)
C1—C61.391 (2)C17—H170.9300
C2—C31.382 (3)C18—C231.389 (2)
C2—H20.9300C18—C191.392 (2)
C3—C41.363 (3)C19—C201.368 (3)
C3—H30.9300C19—H190.9300
C4—C51.366 (3)C20—C211.384 (3)
C4—H40.9300C20—H200.9300
C5—C61.386 (3)C21—C221.377 (3)
C5—H50.9300C22—C231.378 (2)
C6—C71.483 (3)C22—H220.9300
C7—H7A0.9672C23—H230.9300
C7—H7B0.9933C24—H24A0.9600
C8—C91.371 (3)C24—H24B0.9600
C8—C131.383 (3)C24—H24C0.9600
C9—C101.392 (3)C26—H26A0.9600
C9—H90.9300C26—H26B0.9600
C10—C111.378 (3)C26—H26C0.9600
C10—H100.9300
O3—S1—O2119.46 (9)C8—C13—H13120.1
O3—S1—N1106.81 (8)C11—C14—H14A109.5
O2—S1—N1106.18 (7)C11—C14—H14B109.5
O3—S1—C8108.18 (9)H14A—C14—H14B109.5
O2—S1—C8108.44 (9)C11—C14—H14C109.5
N1—S1—C8107.16 (7)H14A—C14—H14C109.5
C21—O4—C24117.95 (16)H14B—C14—H14C109.5
C25—O6—C26116.06 (14)N1—C15—C16110.86 (12)
C1—N1—C15116.00 (11)N1—C15—H15A109.5
C1—N1—S1116.79 (10)C16—C15—H15A109.5
C15—N1—S1115.48 (10)N1—C15—H15B109.5
C2—C1—C6119.77 (16)C16—C15—H15B109.5
C2—C1—N1120.41 (14)H15A—C15—H15B108.1
C6—C1—N1119.79 (14)C17—C16—C25115.34 (14)
C1—C2—C3120.25 (18)C17—C16—C15126.06 (14)
C1—C2—H2119.9C25—C16—C15118.56 (14)
C3—C2—H2119.9C16—C17—C18132.06 (14)
C4—C3—C2120.22 (18)C16—C17—H17114.0
C4—C3—H3119.9C18—C17—H17114.0
C2—C3—H3119.9C23—C18—C19116.85 (15)
C3—C4—C5119.86 (19)C23—C18—C17125.39 (15)
C3—C4—H4120.1C19—C18—C17117.72 (15)
C5—C4—H4120.1C20—C19—C18121.79 (16)
C4—C5—C6121.33 (19)C20—C19—H19119.1
C4—C5—H5119.3C18—C19—H19119.1
C6—C5—H5119.3C19—C20—C21120.10 (17)
C5—C6—C1118.57 (16)C19—C20—H20119.9
C5—C6—C7119.11 (17)C21—C20—H20119.9
C1—C6—C7122.31 (16)O4—C21—C22124.42 (17)
O1A—C7—C6121.8 (2)O4—C21—C20115.99 (17)
O1B—C7—C6117.2 (4)C22—C21—C20119.57 (16)
O1A—C7—H7A118.0C21—C22—C23119.62 (16)
C6—C7—H7A120.0C21—C22—H22120.2
O1B—C7—H7B123.3C23—C22—H22120.2
C6—C7—H7B114.0C22—C23—C18122.03 (16)
C9—C8—C13120.62 (18)C22—C23—H23119.0
C9—C8—S1119.52 (15)C18—C23—H23119.0
C13—C8—S1119.85 (16)O4—C24—H24A109.5
C8—C9—C10118.4 (2)O4—C24—H24B109.5
C8—C9—H9120.8H24A—C24—H24B109.5
C10—C9—H9120.8O4—C24—H24C109.5
C11—C10—C9121.3 (2)H24A—C24—H24C109.5
C11—C10—H10119.4H24B—C24—H24C109.5
C9—C10—H10119.4O5—C25—O6122.00 (15)
C12—C11—C10118.6 (2)O5—C25—C16125.15 (16)
C12—C11—C14121.0 (2)O6—C25—C16112.85 (13)
C10—C11—C14120.4 (3)O6—C26—H26A109.5
C13—C12—C11121.3 (2)O6—C26—H26B109.5
C13—C12—H12119.4H26A—C26—H26B109.5
C11—C12—H12119.4O6—C26—H26C109.5
C12—C13—C8119.7 (2)H26A—C26—H26C109.5
C12—C13—H13120.1H26B—C26—H26C109.5
O3—S1—N1—C1−43.28 (13)C9—C10—C11—C12−0.7 (3)
O2—S1—N1—C1−171.79 (11)C9—C10—C11—C14−179.89 (19)
C8—S1—N1—C172.47 (13)C10—C11—C12—C131.5 (3)
O3—S1—N1—C15175.04 (11)C14—C11—C12—C13−179.3 (2)
O2—S1—N1—C1546.53 (13)C11—C12—C13—C8−1.1 (3)
C8—S1—N1—C15−69.21 (13)C9—C8—C13—C12−0.1 (3)
C15—N1—C1—C245.8 (2)S1—C8—C13—C12178.51 (16)
S1—N1—C1—C2−95.71 (16)C1—N1—C15—C1654.01 (17)
C15—N1—C1—C6−132.35 (15)S1—N1—C15—C16−164.00 (11)
S1—N1—C1—C686.17 (16)N1—C15—C16—C1758.9 (2)
C6—C1—C2—C30.0 (3)N1—C15—C16—C25−118.85 (15)
N1—C1—C2—C3−178.15 (16)C25—C16—C17—C18179.51 (16)
C1—C2—C3—C4−0.6 (3)C15—C16—C17—C181.7 (3)
C2—C3—C4—C50.6 (4)C16—C17—C18—C2319.7 (3)
C3—C4—C5—C60.0 (4)C16—C17—C18—C19−162.71 (17)
C4—C5—C6—C1−0.6 (3)C23—C18—C19—C20−2.0 (3)
C4—C5—C6—C7178.0 (2)C17—C18—C19—C20−179.77 (17)
C2—C1—C6—C50.6 (3)C18—C19—C20—C210.9 (3)
N1—C1—C6—C5178.73 (16)C24—O4—C21—C221.3 (3)
C2—C1—C6—C7−177.97 (18)C24—O4—C21—C20−177.5 (2)
N1—C1—C6—C70.2 (3)C19—C20—C21—O4179.36 (18)
C5—C6—C7—O1A3.6 (4)C19—C20—C21—C220.5 (3)
C1—C6—C7—O1A−177.9 (3)O4—C21—C22—C23−179.51 (17)
C5—C6—C7—O1B66.3 (5)C20—C21—C22—C23−0.7 (3)
C1—C6—C7—O1B−115.1 (5)C21—C22—C23—C18−0.4 (3)
O3—S1—C8—C9−161.09 (14)C19—C18—C23—C221.7 (3)
O2—S1—C8—C9−30.16 (15)C17—C18—C23—C22179.32 (16)
N1—S1—C8—C984.07 (15)C26—O6—C25—O5−2.3 (3)
O3—S1—C8—C1320.28 (17)C26—O6—C25—C16177.19 (15)
O2—S1—C8—C13151.21 (15)C17—C16—C25—O5−4.8 (3)
N1—S1—C8—C13−94.56 (15)C15—C16—C25—O5173.22 (17)
C13—C8—C9—C100.9 (3)C17—C16—C25—O6175.70 (14)
S1—C8—C9—C10−177.74 (13)C15—C16—C25—O6−6.3 (2)
C8—C9—C10—C11−0.5 (3)
D—H···AD—HH···AD···AD—H···A
C9—H9···O1Bi0.932.503.397 (7)162
C15—H15A···O60.972.242.7322 (19)111
C24—H24A···O4ii0.962.523.341 (3)143
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A D—HH⋯A DA D—H⋯A
C9—H9⋯O1B i 0.932.503.397 (7)162
C15—H15A⋯O60.972.242.7322 (19)111
C24—H24A⋯O4ii 0.962.523.341 (3)143

Symmetry codes: (i) ; (ii) .

  6 in total

1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  Tissue distribution and metabolism in rat of an ethynesulphonamide with filaricidal activity.

Authors:  N Radembino; M C Dessalles; J H Trouvin; P M Loiseau; P Gayral; G Mahuzier; M Rapp; P Labarre; D Godeneche; J C Madelmont; J C Maurizis; A Veyre; J L Chabard
Journal:  Xenobiotica       Date:  1997-01       Impact factor: 1.908

3.  Ethyl 2-[N-(2-formyl-phen-yl)benzene-sulfonamido]acetate.

Authors:  S Ranjith; P Sugumar; R Sureshbabu; A K Mohanakrishnan; M N Ponnuswamy
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-02-06

4.  Methyl (Z)-2-{[N-(2-formyl-phen-yl)-4-methyl-benzene-sulfonamido]-meth-yl}-3-phenyl-prop-2-enoate.

Authors:  R Madhanraj; S Murugavel; D Kannan; M Bakthadoss
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-11-30

5.  Crystal structure refinement with SHELXL.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr C Struct Chem       Date:  2015-01-01       Impact factor: 1.172

6.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  6 in total

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