Buy article online - an online subscription or single-article purchase is required to access this article.
Download citation
Download citation
link to html
The title compound, C11H12N2O2S, forms ionic crystals consisting of protonated benzimidazole cations and carboxylic acid anions, C11H13N2O2+·C11H11N2O2. In both ions, the bicyclic 1H-benzimidazole core is essentially planar. The plane of the 2-alkyl­sulfanyl substituent is almost coplanar with the benzimidazole plane. The three-dimensional packing is stabilized by strong inter­molecular N—H...O and O—H...N inter­actions and weak C—H...O inter­molecular hydrogen bonds.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536806015121/dn2032sup1.cif
Contains datablocks I, global

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536806015121/dn2032Isup2.hkl
Contains datablock I

CCDC reference: 610756

Key indicators

  • Single-crystal X-ray study
  • T = 295 K
  • Mean [sigma](C-C) = 0.002 Å
  • R factor = 0.043
  • wR factor = 0.122
  • Data-to-parameter ratio = 26.8

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT041_ALERT_1_C Calc. and Rep. SumFormula Strings Differ .... ? PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ .... ? PLAT045_ALERT_1_C Calculated and Reported Z Differ by ............ 0.50 Ratio PLAT063_ALERT_3_C Crystal Probably too Large for Beam Size ....... 0.80 mm PLAT142_ALERT_4_C su on b - Axis Small or Missing (x 100000) ..... 10 Ang. PLAT143_ALERT_4_C su on c - Axis Small or Missing (x 100000) ..... 10 Ang. PLAT220_ALERT_2_C Large Non-Solvent C Ueq(max)/Ueq(min) ... 2.83 Ratio PLAT222_ALERT_3_C Large Non-Solvent H Ueq(max)/Ueq(min) ... 3.39 Ratio PLAT720_ALERT_4_C Number of Unusual/Non-Standard Label(s) ........ 11
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 9 ALERT level C = Check and explain 0 ALERT level G = General alerts; check 3 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 1 ALERT type 2 Indicator that the structure model may be wrong or deficient 2 ALERT type 3 Indicator that the structure quality may be low 3 ALERT type 4 Improvement, methodology, query or suggestion

Computing details top

Data collection: SMART (Siemens, 1995); cell refinement: SAINT (Siemens, 1995); data reduction: SAINT and SADABS (Sheldrick, 2002); program(s) used to solve structure: SHELXTL (Bruker, 2001); program(s) used to refine structure: SHELXTL; molecular graphics: DIAMOND (Brandenburg, 2006); software used to prepare material for publication: SHELXTL.

2-(1H-Benzimidazol-2-ylsulfanyl)butanoic acid top
Crystal data top
C11H13N2O2SF(000) = 992
Mr = 236.29Dx = 1.444 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 8054 reflections
a = 7.8750 (1) Åθ = 1.9–33.1°
b = 12.5588 (1) ŵ = 0.28 mm1
c = 22.0210 (1) ÅT = 295 K
β = 93.645 (1)°Plate, colorless
V = 2173.48 (3) Å30.80 × 0.34 × 0.16 mm
Z = 8
Data collection top
Siemens SMART CCD area-detector
diffractometer
7839 independent reflections
Radiation source: fine-focus sealed tube5889 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.028
ω scansθmax = 33.1°, θmin = 1.9°
Absorption correction: multi-scan
(SADABS; Sheldrick, 2002)
h = 1211
Tmin = 0.805, Tmax = 0.956k = 1819
33031 measured reflectionsl = 3233
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)] = 0.043Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.122H-atom parameters constrained
S = 1.02 w = 1/[σ2(Fo2) + (0.0601P)2 + 0.6348P]
where P = (Fo2 + 2Fc2)/3
7839 reflections(Δ/σ)max = 0.001
292 parametersΔρmax = 0.35 e Å3
0 restraintsΔρmin = 0.25 e Å3
Special details top

Experimental. Data were collected at low temperature using a Siemens SMART CCD diffractometer equiped with a LT-2 device. A full sphere of reciprocal space was scanned by 0.3° steps in ω with a crystal–to–detector distance of 3.97 cm, 20 s per frame. Preliminary orientation matrix was obtained from the first 100 frames using SMART (Siemens, 1995). The collected frames were integrated using the preliminary orientation matrix which was updated every 100 frames. Final cell parameters were obtained by refinement on the position of 8054 reflections with I>10σ(I) after integration of all the frames data using SAINT (Siemens, 1995).

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
S1A0.08001 (4)0.14520 (2)0.317964 (15)0.02994 (8)
O1A0.27260 (15)0.33575 (8)0.30046 (5)0.0402 (2)
H1A0.31620.39130.28960.060*
O2A0.18832 (17)0.43621 (9)0.37607 (6)0.0515 (3)
N1A0.10571 (14)0.28598 (8)0.24352 (5)0.0281 (2)
H1A10.11840.33390.27070.034*
N3A0.02577 (14)0.13919 (8)0.19978 (5)0.0283 (2)
H3A0.02120.07830.19460.034*
C1A0.18635 (18)0.35400 (10)0.34762 (6)0.0303 (3)
C2A0.07637 (17)0.26154 (10)0.36737 (6)0.0285 (2)
H2A0.04140.28680.36710.034*
C3A0.13118 (19)0.22761 (13)0.43274 (6)0.0382 (3)
H3A10.11140.28640.46000.046*
H3A20.06040.16860.44410.046*
C4A0.3168 (2)0.19444 (18)0.44140 (8)0.0540 (4)
H4A10.33670.13420.41590.081*
H4A20.34290.17560.48320.081*
H4A30.38810.25250.43050.081*
C5A0.02016 (15)0.19441 (10)0.25187 (6)0.0255 (2)
C6A0.12042 (16)0.19674 (10)0.15546 (6)0.0282 (2)
C7A0.1669 (2)0.17585 (12)0.09474 (6)0.0381 (3)
H7A0.13340.11390.07570.046*
C8A0.2660 (2)0.25228 (13)0.06417 (7)0.0453 (4)
H8A0.30010.24110.02350.054*
C9A0.3164 (2)0.34558 (13)0.09245 (8)0.0445 (4)
H9A0.38330.39460.07010.053*
C10A0.26966 (18)0.36691 (11)0.15269 (7)0.0366 (3)
H10A0.30270.42910.17160.044*
C11A0.17023 (16)0.29018 (10)0.18348 (6)0.0277 (2)
S1B0.57038 (4)0.64591 (2)0.307055 (16)0.03188 (9)
O1B0.82333 (13)0.45993 (7)0.30577 (5)0.0334 (2)
O2B0.64773 (16)0.35096 (8)0.34996 (6)0.0442 (3)
N1B0.43777 (15)0.64400 (9)0.19195 (5)0.0317 (2)
H1B0.47320.70750.18550.038*
N3B0.39265 (14)0.49195 (8)0.24066 (5)0.0284 (2)
C1B0.69454 (16)0.44082 (9)0.33593 (6)0.0272 (2)
C2B0.59402 (17)0.53502 (10)0.35966 (6)0.0274 (2)
H2B0.48090.51020.36930.033*
C3B0.6853 (2)0.58213 (12)0.41747 (6)0.0405 (3)
H3B10.78860.61740.40660.049*
H3B20.61250.63540.43440.049*
C4B0.7304 (4)0.49849 (18)0.46573 (8)0.0749 (7)
H4B10.63310.45420.47110.112*
H4B20.76410.53300.50350.112*
H4B30.82250.45550.45310.112*
C5B0.46085 (16)0.58859 (10)0.24468 (6)0.0265 (2)
C6B0.31988 (16)0.48480 (10)0.18117 (6)0.0278 (2)
C7B0.22910 (18)0.40182 (11)0.15245 (7)0.0351 (3)
H7B0.20870.33860.17270.042*
C8B0.1704 (2)0.41733 (13)0.09242 (7)0.0416 (3)
H8B0.10920.36340.07200.050*
C9B0.2011 (2)0.51220 (14)0.06186 (7)0.0426 (3)
H9B0.16170.51940.02130.051*
C10B0.28859 (19)0.59579 (13)0.09029 (7)0.0385 (3)
H10B0.30730.65940.07010.046*
C11B0.34712 (16)0.57993 (10)0.15049 (6)0.0293 (3)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
S1A0.03615 (17)0.02218 (14)0.03098 (15)0.00052 (11)0.00184 (12)0.00199 (11)
O1A0.0571 (7)0.0297 (5)0.0349 (5)0.0145 (5)0.0114 (5)0.0003 (4)
O2A0.0632 (8)0.0334 (6)0.0590 (7)0.0095 (5)0.0135 (6)0.0154 (5)
N1A0.0299 (5)0.0235 (5)0.0308 (5)0.0027 (4)0.0005 (4)0.0045 (4)
N3A0.0338 (5)0.0207 (5)0.0302 (5)0.0033 (4)0.0004 (4)0.0028 (4)
C1A0.0347 (6)0.0252 (6)0.0302 (6)0.0009 (5)0.0038 (5)0.0009 (5)
C2A0.0305 (6)0.0290 (6)0.0262 (5)0.0016 (5)0.0018 (5)0.0002 (5)
C3A0.0404 (7)0.0466 (8)0.0276 (6)0.0049 (6)0.0021 (5)0.0036 (6)
C4A0.0459 (9)0.0724 (12)0.0423 (9)0.0047 (8)0.0079 (7)0.0156 (8)
C5A0.0252 (5)0.0225 (5)0.0288 (5)0.0017 (4)0.0020 (4)0.0012 (4)
C6A0.0308 (6)0.0232 (5)0.0303 (6)0.0017 (5)0.0008 (5)0.0004 (4)
C7A0.0513 (8)0.0318 (7)0.0306 (6)0.0033 (6)0.0027 (6)0.0028 (5)
C8A0.0571 (10)0.0422 (8)0.0349 (7)0.0071 (7)0.0104 (7)0.0051 (6)
C9A0.0469 (9)0.0373 (8)0.0474 (8)0.0008 (6)0.0128 (7)0.0111 (6)
C10A0.0341 (7)0.0279 (6)0.0470 (8)0.0033 (5)0.0038 (6)0.0043 (6)
C11A0.0259 (5)0.0236 (5)0.0332 (6)0.0013 (4)0.0006 (5)0.0006 (5)
S1B0.03811 (18)0.01909 (14)0.03759 (17)0.00074 (11)0.00421 (13)0.00124 (12)
O1B0.0356 (5)0.0239 (4)0.0418 (5)0.0014 (4)0.0099 (4)0.0031 (4)
O2B0.0559 (7)0.0208 (4)0.0571 (7)0.0054 (4)0.0119 (5)0.0001 (4)
N1B0.0374 (6)0.0219 (5)0.0356 (6)0.0020 (4)0.0004 (5)0.0071 (4)
N3B0.0309 (5)0.0233 (5)0.0306 (5)0.0018 (4)0.0005 (4)0.0046 (4)
C1B0.0316 (6)0.0205 (5)0.0291 (6)0.0003 (4)0.0013 (5)0.0025 (4)
C2B0.0308 (6)0.0234 (5)0.0280 (5)0.0004 (4)0.0021 (5)0.0013 (4)
C3B0.0544 (9)0.0351 (7)0.0311 (7)0.0027 (6)0.0038 (6)0.0079 (6)
C4B0.126 (2)0.0584 (12)0.0369 (9)0.0069 (13)0.0219 (11)0.0008 (8)
C5B0.0266 (5)0.0212 (5)0.0317 (6)0.0024 (4)0.0019 (5)0.0022 (4)
C6B0.0266 (6)0.0257 (6)0.0309 (6)0.0015 (4)0.0004 (5)0.0033 (5)
C7B0.0353 (7)0.0304 (6)0.0392 (7)0.0040 (5)0.0017 (5)0.0011 (5)
C8B0.0391 (8)0.0441 (8)0.0408 (8)0.0033 (6)0.0050 (6)0.0045 (6)
C9B0.0396 (8)0.0551 (9)0.0325 (7)0.0016 (7)0.0031 (6)0.0041 (6)
C10B0.0389 (7)0.0419 (8)0.0343 (7)0.0015 (6)0.0012 (6)0.0115 (6)
C11B0.0275 (6)0.0273 (6)0.0329 (6)0.0018 (5)0.0000 (5)0.0057 (5)
Geometric parameters (Å, º) top
S1A—C5A1.7253 (13)C10A—H10A0.9300
S1A—C2A1.8229 (13)S1B—C5B1.7316 (13)
O1A—C1A1.2971 (17)S1B—C2B1.8136 (13)
O1A—H1A0.8200O1B—C1B1.2700 (16)
O2A—C1A1.2072 (17)O2B—C1B1.2326 (15)
N1A—C5A1.3396 (16)N1B—C5B1.3560 (16)
N1A—C11A1.3868 (16)N1B—C11B1.3812 (17)
N1A—H1A10.8600N1B—H1B0.8600
N3A—C5A1.3387 (16)N3B—C5B1.3278 (16)
N3A—C6A1.3922 (16)N3B—C6B1.3990 (16)
N3A—H3A0.8600C1B—C2B1.5336 (17)
C1A—C2A1.5283 (18)C2B—C3B1.5396 (18)
C2A—C3A1.5366 (18)C2B—H2B0.9800
C2A—H2A0.9800C3B—C4B1.520 (2)
C3A—C4A1.521 (2)C3B—H3B10.9700
C3A—H3A10.9700C3B—H3B20.9700
C3A—H3A20.9700C4B—H4B10.9600
C4A—H4A10.9600C4B—H4B20.9600
C4A—H4A20.9600C4B—H4B30.9600
C4A—H4A30.9600C6B—C7B1.3927 (19)
C6A—C7A1.3886 (18)C6B—C11B1.3959 (17)
C6A—C11A1.3937 (18)C7B—C8B1.386 (2)
C7A—C8A1.384 (2)C7B—H7B0.9300
C7A—H7A0.9300C8B—C9B1.397 (2)
C8A—C9A1.397 (2)C8B—H8B0.9300
C8A—H8A0.9300C9B—C10B1.384 (2)
C9A—C10A1.380 (2)C9B—H9B0.9300
C9A—H9A0.9300C10B—C11B1.3898 (18)
C10A—C11A1.3906 (18)C10B—H10B0.9300
C5A—S1A—C2A101.11 (6)N1A—C11A—C6A107.08 (11)
C1A—O1A—H1A109.5C5B—S1B—C2B102.31 (6)
C5A—N1A—C11A108.31 (10)C5B—N1B—C11B107.61 (11)
C5A—N1A—H1A1125.8C5B—N1B—H1B126.2
C11A—N1A—H1A1125.8C11B—N1B—H1B126.2
C5A—N3A—C6A108.59 (10)C5B—N3B—C6B105.13 (10)
C5A—N3A—H3A125.7O2B—C1B—O1B124.44 (12)
C6A—N3A—H3A125.7O2B—C1B—C2B116.86 (12)
O2A—C1A—O1A125.21 (13)O1B—C1B—C2B118.62 (11)
O2A—C1A—C2A119.41 (13)C1B—C2B—C3B110.76 (11)
O1A—C1A—C2A115.38 (11)C1B—C2B—S1B114.14 (9)
C1A—C2A—C3A110.29 (11)C3B—C2B—S1B104.87 (9)
C1A—C2A—S1A114.11 (9)C1B—C2B—H2B109.0
C3A—C2A—S1A108.83 (10)C3B—C2B—H2B109.0
C1A—C2A—H2A107.8S1B—C2B—H2B109.0
C3A—C2A—H2A107.8C4B—C3B—C2B112.86 (13)
S1A—C2A—H2A107.8C4B—C3B—H3B1109.0
C4A—C3A—C2A113.83 (12)C2B—C3B—H3B1109.0
C4A—C3A—H3A1108.8C4B—C3B—H3B2109.0
C2A—C3A—H3A1108.8C2B—C3B—H3B2109.0
C4A—C3A—H3A2108.8H3B1—C3B—H3B2107.8
C2A—C3A—H3A2108.8C3B—C4B—H4B1109.5
H3A1—C3A—H3A2107.7C3B—C4B—H4B2109.5
C3A—C4A—H4A1109.5H4B1—C4B—H4B2109.5
C3A—C4A—H4A2109.5C3B—C4B—H4B3109.5
H4A1—C4A—H4A2109.5H4B1—C4B—H4B3109.5
C3A—C4A—H4A3109.5H4B2—C4B—H4B3109.5
H4A1—C4A—H4A3109.5N3B—C5B—N1B112.36 (11)
H4A2—C4A—H4A3109.5N3B—C5B—S1B127.72 (10)
N1A—C5A—N3A109.77 (11)N1B—C5B—S1B119.92 (10)
N1A—C5A—S1A128.49 (10)C7B—C6B—C11B120.72 (12)
N3A—C5A—S1A121.71 (9)C7B—C6B—N3B129.89 (12)
N3A—C6A—C7A132.35 (12)C11B—C6B—N3B109.39 (11)
N3A—C6A—C11A106.25 (11)C6B—C7B—C8B117.29 (13)
C7A—C6A—C11A121.40 (12)C6B—C7B—H7B121.4
C6A—C7A—C8A116.31 (14)C8B—C7B—H7B121.4
C6A—C7A—H7A121.8C7B—C8B—C9B121.46 (14)
C8A—C7A—H7A121.8C7B—C8B—H8B119.3
C7A—C8A—C9A122.16 (14)C9B—C8B—H8B119.3
C7A—C8A—H8A118.9C10B—C9B—C8B121.70 (14)
C9A—C8A—H8A118.9C10B—C9B—H9B119.1
C10A—C9A—C8A121.69 (14)C8B—C9B—H9B119.1
C10A—C9A—H9A119.2C9B—C10B—C11B116.64 (14)
C8A—C9A—H9A119.2C9B—C10B—H10B121.7
C11A—C10A—C9A116.22 (14)C11B—C10B—H10B121.7
C11A—C10A—H10A121.9C10B—C11B—N1B132.31 (12)
C9A—C10A—H10A121.9C10B—C11B—C6B122.18 (13)
C10A—C11A—N1A130.69 (12)N1B—C11B—C6B105.51 (11)
C10A—C11A—C6A122.22 (13)
O2A—C1A—C2A—C3A59.65 (17)O2B—C1B—C2B—C3B97.98 (15)
O1A—C1A—C2A—C3A119.89 (13)O1B—C1B—C2B—C3B79.02 (15)
O2A—C1A—C2A—S1A177.50 (12)O2B—C1B—C2B—S1B143.95 (11)
O1A—C1A—C2A—S1A2.96 (15)O1B—C1B—C2B—S1B39.04 (15)
C5A—S1A—C2A—C1A66.72 (10)C5B—S1B—C2B—C1B60.70 (10)
C5A—S1A—C2A—C3A169.64 (9)C5B—S1B—C2B—C3B177.92 (9)
C1A—C2A—C3A—C4A58.05 (17)C1B—C2B—C3B—C4B51.59 (19)
S1A—C2A—C3A—C4A67.84 (15)S1B—C2B—C3B—C4B175.17 (15)
C11A—N1A—C5A—N3A0.25 (14)C6B—N3B—C5B—N1B0.25 (14)
C11A—N1A—C5A—S1A177.60 (10)C6B—N3B—C5B—S1B179.87 (10)
C6A—N3A—C5A—N1A0.51 (15)C11B—N1B—C5B—N3B0.49 (15)
C6A—N3A—C5A—S1A177.51 (9)C11B—N1B—C5B—S1B179.86 (9)
C2A—S1A—C5A—N1A11.43 (13)C2B—S1B—C5B—N3B8.10 (13)
C2A—S1A—C5A—N3A170.95 (11)C2B—S1B—C5B—N1B171.50 (10)
C5A—N3A—C6A—C7A179.03 (15)C5B—N3B—C6B—C7B178.77 (14)
C5A—N3A—C6A—C11A0.56 (14)C5B—N3B—C6B—C11B0.08 (14)
N3A—C6A—C7A—C8A179.02 (15)C11B—C6B—C7B—C8B1.0 (2)
C11A—C6A—C7A—C8A0.5 (2)N3B—C6B—C7B—C8B179.62 (14)
C6A—C7A—C8A—C9A0.2 (2)C6B—C7B—C8B—C9B0.1 (2)
C7A—C8A—C9A—C10A0.2 (3)C7B—C8B—C9B—C10B1.2 (3)
C8A—C9A—C10A—C11A0.2 (2)C8B—C9B—C10B—C11B1.1 (2)
C9A—C10A—C11A—N1A178.54 (14)C9B—C10B—C11B—N1B179.59 (14)
C9A—C10A—C11A—C6A0.1 (2)C9B—C10B—C11B—C6B0.0 (2)
C5A—N1A—C11A—C10A178.70 (14)C5B—N1B—C11B—C10B179.90 (15)
C5A—N1A—C11A—C6A0.10 (14)C5B—N1B—C11B—C6B0.50 (14)
N3A—C6A—C11A—C10A179.14 (12)C7B—C6B—C11B—C10B1.2 (2)
C7A—C6A—C11A—C10A0.5 (2)N3B—C6B—C11B—C10B179.99 (13)
N3A—C6A—C11A—N1A0.40 (14)C7B—C6B—C11B—N1B179.20 (12)
C7A—C6A—C11A—N1A179.24 (13)N3B—C6B—C11B—N1B0.36 (14)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1A—H1A1···O1Bi0.861.832.6574 (14)160
O1A—H1A···N3B0.821.792.5757 (14)160
N1B—H1B···O1Aii0.862.573.3137 (17)145
N1B—H1B···O2Bii0.862.162.8252 (14)134
N3A—H3A···O1Biii0.861.932.7658 (14)165
C2A—H2A···O2Bi0.982.583.5550 (18)172
C2B—H2B···O2A0.982.503.4676 (18)170
C4A—H4A1···S1A0.962.863.2565 (18)106
C7A—H7A···O2Aiv0.932.523.0843 (19)119
Symmetry codes: (i) x1, y, z; (ii) x+1, y+1/2, z+1/2; (iii) x+1, y1/2, z+1/2; (iv) x, y1/2, z+1/2.
 

Subscribe to Acta Crystallographica Section E: Crystallographic Communications

The full text of this article is available to subscribers to the journal.

If you have already registered and are using a computer listed in your registration details, please email support@iucr.org for assistance.

Buy online

You may purchase this article in PDF and/or HTML formats. For purchasers in the European Community who do not have a VAT number, VAT will be added at the local rate. Payments to the IUCr are handled by WorldPay, who will accept payment by credit card in several currencies. To purchase the article, please complete the form below (fields marked * are required), and then click on `Continue'.
E-mail address* 
Repeat e-mail address* 
(for error checking) 

Format*   PDF (US $40)
   HTML (US $40)
   PDF+HTML (US $50)
In order for VAT to be shown for your country javascript needs to be enabled.

VAT number 
(non-UK EC countries only) 
Country* 
 

Terms and conditions of use
Contact us

Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds