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, [Sn(C4H9)2(C7H5N2O4)2], has twofold rotation symmetry, and two 2-amino-5-nitro­benzoate ligands are chelated to the dibutyl­tin unit through both O atoms of the carboxyl­ate group in a six-coordinate environment. There are intra- and inter­molecular N—H...O hydrogen bonds, forming one-dimensional chains parallel to the b axis.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536805039875/ob6595sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536805039875/ob6595Isup2.hkl
Contains datablock I

CCDC reference: 296621

Key indicators

  • Single-crystal X-ray study
  • T = 298 K
  • Mean [sigma](C-C) = 0.003 Å
  • R factor = 0.022
  • wR factor = 0.060
  • Data-to-parameter ratio = 14.6

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT232_ALERT_2_C Hirshfeld Test Diff (M-X) Sn1 - O3 .. 7.60 su PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 6 C7 -SN1 -O3 -C7 3.20 0.50 2.655 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 38 C1 -C6 -C7 -SN1 -13.00 1.10 1.555 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 39 C5 -C6 -C7 -SN1 165.90 0.80 1.555 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 44 O3 -SN1 -C7 -O3 178.40 0.20 2.655 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 50 O3 -SN1 -C7 -O4 -3.20 0.40 2.655 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 52 O4 -SN1 -C7 -C6 10.80 0.90 1.555 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 53 O4 -SN1 -C7 -C6 9.60 1.00 2.655 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 54 C8 -SN1 -C7 -C6 116.50 0.90 2.655 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 55 C8 -SN1 -C7 -C6 -98.10 0.90 1.555 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 56 O3 -SN1 -C7 -C6 -170.90 1.00 1.555 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 57 O3 -SN1 -C7 -C6 7.50 1.20 2.655 1.555 1.555 1.555 PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... # 58 C7 -SN1 -C7 -C6 10.00 0.90 2.655 1.555 1.555 1.555
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 13 ALERT level C = Check and explain 0 ALERT level G = General alerts; check 0 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 0 ALERT type 3 Indicator that the structure quality may be low 12 ALERT type 4 Improvement, methodology, query or suggestion

Comment top

The reaction of dibutyltin oxide with substituted aromatic carboxylic acids such as 3-hydroxyphthalide and (E)-3-(4-methoxyphenyl)-2-phenyl-2-propenoic acid leads to the formation of distannoxane-type complexes of [Sn4(C4H9)8(C8H5O3)4(µ-O)2] (Khoo & Hazell, 1999) and [Sn4(C4H9)8(C17H15O2)4O2] (Parvez et al., 2004), respectively. However, the reaction of dibutyltin oxide with 2-amino-5-nitrobenzoic acid gave a normal monomeric condensation reaction product, (I).

In (I), the molecule has a twofold symmetry (Fig. 1) and is isostructural with di-n-butylbis(thiophene-3-carboxylato-O,O')tin(IV), (II) (Yahyi et al., 2001). The ligands are chelated to atom Sn1 asymmetrically via both O atoms of the carboxylate groups in a bidentate manner. The geometry of the Sn atom is highly distorted octahedral (Table 1). The Sn—O bond lengths are in agreement with the isostructural analogue (II) [Sn—O = 2.1233 (13) and 2.5641 (14) Å]. The chelated aminobenzoate fragment Sn1/O3/O4/N1/C1–C7 is planar, with a maximum devation from the least squares plane of 0.029 (2) Å for atom O3. The molecules are stablized by intra- and intermolecular N—H···O hydrogen bonds (Table 2), forming one-dimensional chains parallel to the b axis (Fig. 2).

Experimental top

A solution of di-n-butyltin(IV) oxide (0.75 g, 3 mmol) and (2-amino-5-nitro)benzoic acid (1.09 g, 6 mmol) in methanol (60 ml) was refluxed for ca 4 h. The water formed during the reaction was removed by azeotropic dehydration using a Dean and Stark apparatus. The clear yellow solution was filtered and left for evaporation at room temperature. Yellow crystals were obtained after two weeks (yield 1.60 g, 90%; m.p. 482–483 K). Analysis found: C 43.91, H 4.46, N 8.85, Sn 19.08%; calculated: C 44.3, H 4.7, N 9.4, Sn 19.9%.

Refinement top

H atoms were located in difference-density maps and repositioned geometrically, with N—H = 0.86 Å and C—H = 0.93–0.97 Å. They were constrained to ride on their parent atoms, with Uiso(H) values of 1.2 (1.5 for methyl) times Ueq(C,N).

Computing details top

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 1997); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL, PARST (Nardelli, 1995) and PLATON (Spek, 2003).

Figures top
[Figure 1] Fig. 1. Molecular structure of (I), with 50% probability displacement ellipsoids. Unlabeled atoms are related to labeled atoms by (1 − x, y, 1/2 − z).
[Figure 2] Fig. 2. A packing diagram of (I). The dashed lines denote hydrogen bonds.
Bis(2-amino-5-nitrobenzoato-κ2O,O')di-n-butyltin(IV) top
Crystal data top
[Sn(C4H9)2(C7H5N2O4)2]F(000) = 1208
Mr = 595.17Dx = 1.581 Mg m3
Monoclinic, C2/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2ycCell parameters from 5761 reflections
a = 14.356 (4) Åθ = 2.1–25.5°
b = 9.006 (2) ŵ = 1.08 mm1
c = 20.155 (5) ÅT = 298 K
β = 106.305 (4)°Block, light yellow
V = 2501.0 (11) Å30.48 × 0.44 × 0.18 mm
Z = 4
Data collection top
Bruker SMART APEX CCD area-detector
diffractometer
2328 independent reflections
Radiation source: fine-focus sealed tube2257 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.015
Detector resolution: 83.66 pixels mm-1θmax = 25.5°, θmin = 2.1°
ω scansh = 1717
Absorption correction: multi-scan
(SADABS; Bruker, 2000)
k = 1010
Tmin = 0.626, Tmax = 0.830l = 1924
6494 measured reflections
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)] = 0.022Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.060H-atom parameters constrained
S = 1.14 w = 1/[σ2(Fo2) + (0.0309P)2 + 2.0841P]
where P = (Fo2 + 2Fc2)/3
2328 reflections(Δ/σ)max < 0.001
160 parametersΔρmax = 0.43 e Å3
0 restraintsΔρmin = 0.29 e Å3
Crystal data top
[Sn(C4H9)2(C7H5N2O4)2]V = 2501.0 (11) Å3
Mr = 595.17Z = 4
Monoclinic, C2/cMo Kα radiation
a = 14.356 (4) ŵ = 1.08 mm1
b = 9.006 (2) ÅT = 298 K
c = 20.155 (5) Å0.48 × 0.44 × 0.18 mm
β = 106.305 (4)°
Data collection top
Bruker SMART APEX CCD area-detector
diffractometer
2328 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2000)
2257 reflections with I > 2σ(I)
Tmin = 0.626, Tmax = 0.830Rint = 0.015
6494 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0220 restraints
wR(F2) = 0.060H-atom parameters constrained
S = 1.14Δρmax = 0.43 e Å3
2328 reflectionsΔρmin = 0.29 e Å3
160 parameters
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Sn10.50000.32559 (2)0.25000.03777 (9)
O10.6125 (2)0.3002 (2)0.08958 (11)0.0802 (7)
O20.63931 (16)0.30009 (18)0.01057 (11)0.0608 (5)
O30.56250 (13)0.36944 (17)0.14951 (8)0.0474 (4)
O40.53727 (13)0.15268 (16)0.19048 (9)0.0462 (4)
N10.62603 (15)0.2351 (2)0.03967 (10)0.0475 (5)
N20.61462 (16)0.3828 (2)0.03276 (11)0.0489 (5)
H2A0.62950.42780.00040.059*
H2B0.59820.43310.06390.059*
C10.59740 (15)0.0002 (2)0.09032 (10)0.0363 (4)
H10.58220.05280.12550.044*
C20.62367 (15)0.0744 (2)0.03885 (11)0.0366 (4)
C30.64635 (15)0.0011 (2)0.01463 (11)0.0404 (5)
H30.66360.05090.04930.048*
C40.64298 (17)0.1525 (2)0.01568 (12)0.0409 (5)
H40.65840.20310.05140.049*
C50.61668 (15)0.2344 (2)0.03606 (11)0.0349 (4)
C60.59348 (15)0.1543 (2)0.09002 (11)0.0343 (4)
C70.56347 (15)0.2308 (2)0.14539 (11)0.0379 (4)
C80.36507 (17)0.3994 (3)0.18379 (12)0.0498 (5)
H8A0.35090.34270.14120.060*
H8B0.31450.37800.20570.060*
C90.36097 (18)0.5645 (3)0.16583 (13)0.0509 (6)
H9A0.41790.59000.15130.061*
H9B0.30430.58270.12710.061*
C100.3566 (3)0.6646 (3)0.22498 (16)0.0672 (8)
H10A0.41370.64770.26350.081*
H10B0.30020.63850.24000.081*
C110.3512 (3)0.8279 (3)0.20626 (19)0.0800 (10)
H11A0.40680.85470.19130.120*
H11B0.35010.88600.24600.120*
H11C0.29320.84650.16960.120*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Sn10.05394 (14)0.02975 (12)0.03378 (13)0.0000.01916 (9)0.000
O10.159 (2)0.0303 (9)0.0612 (13)0.0036 (11)0.0474 (14)0.0064 (8)
O20.0945 (14)0.0327 (8)0.0643 (12)0.0017 (8)0.0372 (11)0.0120 (8)
O30.0742 (11)0.0294 (7)0.0471 (9)0.0030 (7)0.0311 (8)0.0051 (7)
O40.0734 (11)0.0309 (7)0.0440 (9)0.0004 (7)0.0325 (8)0.0001 (6)
N10.0650 (12)0.0284 (9)0.0495 (11)0.0007 (9)0.0170 (9)0.0032 (9)
N20.0780 (13)0.0277 (9)0.0528 (12)0.0005 (9)0.0375 (10)0.0030 (8)
C10.0455 (11)0.0287 (10)0.0345 (10)0.0024 (8)0.0112 (9)0.0014 (8)
C20.0443 (11)0.0255 (10)0.0394 (11)0.0001 (8)0.0110 (9)0.0028 (8)
C30.0490 (11)0.0348 (11)0.0409 (11)0.0011 (9)0.0185 (9)0.0079 (9)
C40.0538 (12)0.0351 (11)0.0396 (12)0.0035 (9)0.0227 (10)0.0006 (9)
C50.0408 (10)0.0282 (10)0.0376 (11)0.0020 (8)0.0143 (8)0.0004 (8)
C60.0415 (10)0.0283 (10)0.0347 (10)0.0019 (8)0.0134 (9)0.0024 (8)
C70.0487 (11)0.0315 (10)0.0367 (11)0.0003 (9)0.0169 (9)0.0013 (9)
C80.0526 (13)0.0509 (14)0.0446 (13)0.0031 (11)0.0115 (10)0.0006 (11)
C90.0532 (13)0.0529 (14)0.0443 (13)0.0043 (11)0.0096 (10)0.0043 (11)
C100.084 (2)0.0632 (18)0.0528 (16)0.0108 (14)0.0166 (15)0.0017 (13)
C110.104 (3)0.0575 (19)0.071 (2)0.0115 (16)0.0132 (19)0.0082 (14)
Geometric parameters (Å, º) top
Sn1—O42.1238 (15)C2—C31.388 (3)
Sn1—O4i2.1238 (15)C3—C41.364 (3)
Sn1—C8i2.127 (2)C3—H30.9300
Sn1—C82.127 (2)C4—C51.413 (3)
Sn1—O32.4665 (16)C4—H40.9300
Sn1—O3i2.4665 (16)C5—C61.420 (3)
Sn1—C72.662 (2)C6—C71.475 (3)
Sn1—C7i2.662 (2)C8—C91.527 (3)
O1—N11.226 (3)C8—H8A0.9700
O2—N11.230 (3)C8—H8B0.9700
O3—C71.252 (3)C9—C101.510 (4)
O4—C71.286 (3)C9—H9A0.9700
N1—C21.448 (3)C9—H9B0.9700
N2—C51.338 (3)C10—C111.515 (4)
N2—H2A0.8584C10—H10A0.9700
N2—H2B0.8584C10—H10B0.9700
C1—C21.374 (3)C11—H11A0.9600
C1—C61.390 (3)C11—H11B0.9600
C1—H10.9300C11—H11C0.9600
O4—Sn1—O4i85.68 (8)C4—C3—C2119.1 (2)
O4—Sn1—C8i104.72 (8)C4—C3—H3120.4
O4i—Sn1—C8i101.79 (9)C2—C3—H3120.4
O4—Sn1—C8101.79 (9)C3—C4—C5121.8 (2)
O4i—Sn1—C8104.72 (8)C3—C4—H4119.1
C8i—Sn1—C8143.56 (14)C5—C4—H4119.1
O4—Sn1—O356.37 (6)N2—C5—C4119.47 (19)
O4i—Sn1—O3142.05 (5)N2—C5—C6122.59 (18)
C8i—Sn1—O389.31 (8)C4—C5—C6117.94 (18)
C8—Sn1—O384.95 (8)C1—C6—C5119.53 (19)
O4—Sn1—O3i142.05 (5)C1—C6—C7118.89 (19)
O4i—Sn1—O3i56.37 (6)C5—C6—C7121.57 (18)
C8i—Sn1—O3i84.95 (8)O3—C7—O4119.19 (18)
C8—Sn1—O3i89.31 (8)O3—C7—C6121.80 (18)
O3—Sn1—O3i161.57 (7)O4—C7—C6119.01 (18)
O4—Sn1—C728.45 (6)O3—C7—Sn167.34 (11)
O4i—Sn1—C7114.13 (6)O4—C7—Sn151.87 (10)
C8i—Sn1—C798.24 (8)C6—C7—Sn1170.73 (15)
C8—Sn1—C793.29 (8)C9—C8—Sn1114.88 (16)
O3—Sn1—C727.93 (6)C9—C8—H8A108.5
O3i—Sn1—C7170.49 (6)Sn1—C8—H8A108.5
O4—Sn1—C7i114.13 (6)C9—C8—H8B108.5
O4i—Sn1—C7i28.45 (6)Sn1—C8—H8B108.5
C8i—Sn1—C7i93.29 (8)H8A—C8—H8B107.5
C8—Sn1—C7i98.24 (8)C10—C9—C8113.7 (2)
O3—Sn1—C7i170.49 (6)C10—C9—H9A108.8
O3i—Sn1—C7i27.93 (6)C8—C9—H9A108.8
C7—Sn1—C7i142.58 (9)C10—C9—H9B108.8
C7—O3—Sn184.73 (12)C8—C9—H9B108.8
C7—O4—Sn199.68 (12)H9A—C9—H9B107.7
O1—N1—O2123.0 (2)C9—C10—C11113.2 (3)
O1—N1—C2118.61 (19)C9—C10—H10A108.9
O2—N1—C2118.34 (19)C11—C10—H10A108.9
C5—N2—H2A120.2C9—C10—H10B108.9
C5—N2—H2B119.8C11—C10—H10B108.9
H2A—N2—H2B120.0H10A—C10—H10B107.8
C2—C1—C6120.27 (19)C10—C11—H11A109.5
C2—C1—H1119.9C10—C11—H11B109.5
C6—C1—H1119.9H11A—C11—H11B109.5
C1—C2—C3121.40 (19)C10—C11—H11C109.5
C1—C2—N1119.35 (19)H11A—C11—H11C109.5
C3—C2—N1119.24 (18)H11B—C11—H11C109.5
O4—Sn1—O3—C70.93 (12)C5—C6—C7—O34.2 (3)
O4i—Sn1—O3—C70.72 (18)C1—C6—C7—O43.3 (3)
C8i—Sn1—O3—C7109.19 (14)C5—C6—C7—O4175.57 (19)
C8—Sn1—O3—C7106.83 (14)C1—C6—C7—Sn113.0 (11)
O3i—Sn1—O3—C7179.16 (13)C5—C6—C7—Sn1165.9 (8)
C7i—Sn1—O3—C73.2 (5)O4—Sn1—C7—O3178.4 (2)
O4i—Sn1—O4—C7178.95 (17)O4i—Sn1—C7—O3179.52 (12)
C8i—Sn1—O4—C779.98 (15)C8i—Sn1—C7—O372.59 (14)
C8—Sn1—O4—C774.79 (15)C8—Sn1—C7—O372.75 (14)
O3—Sn1—O4—C70.92 (12)O3i—Sn1—C7—O3178.4 (2)
O3i—Sn1—O4—C7179.13 (12)C7i—Sn1—C7—O3179.12 (13)
C7i—Sn1—O4—C7179.50 (8)O4i—Sn1—C7—O41.15 (19)
C6—C1—C2—C30.3 (3)C8i—Sn1—C7—O4105.77 (15)
C6—C1—C2—N1179.19 (19)C8—Sn1—C7—O4108.89 (15)
O1—N1—C2—C16.2 (3)O3—Sn1—C7—O4178.4 (2)
O2—N1—C2—C1172.2 (2)O3i—Sn1—C7—O43.2 (4)
O1—N1—C2—C3175.0 (2)C7i—Sn1—C7—O40.75 (12)
O2—N1—C2—C36.7 (3)O4—Sn1—C7—C610.8 (9)
C1—C2—C3—C40.4 (3)O4i—Sn1—C7—C69.6 (10)
N1—C2—C3—C4179.3 (2)C8i—Sn1—C7—C6116.5 (9)
C2—C3—C4—C50.2 (3)C8—Sn1—C7—C698.1 (9)
C3—C4—C5—N2179.9 (2)O3—Sn1—C7—C6170.9 (10)
C3—C4—C5—C60.0 (3)O3i—Sn1—C7—C67.5 (12)
C2—C1—C6—C50.1 (3)C7i—Sn1—C7—C610.0 (9)
C2—C1—C6—C7179.01 (19)O4—Sn1—C8—C9123.72 (17)
N2—C5—C6—C1179.8 (2)O4i—Sn1—C8—C9147.69 (17)
C4—C5—C6—C10.1 (3)C8i—Sn1—C8—C912.32 (16)
N2—C5—C6—C71.3 (3)O3—Sn1—C8—C969.62 (18)
C4—C5—C6—C7178.81 (19)O3i—Sn1—C8—C992.85 (18)
Sn1—O3—C7—O41.5 (2)C7—Sn1—C8—C996.30 (18)
Sn1—O3—C7—C6178.28 (19)C7i—Sn1—C8—C9119.40 (18)
Sn1—O4—C7—O31.7 (2)Sn1—C8—C9—C1072.8 (3)
Sn1—O4—C7—C6178.03 (16)C8—C9—C10—C11179.2 (3)
C1—C6—C7—O3176.9 (2)
Symmetry code: (i) x+1, y, z+1/2.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N2—H2B···O30.862.022.665 (3)132
C1—H1···O40.932.462.772 (3)100
N2—H2A···O2ii0.862.473.036 (3)124
N2—H2B···O1ii0.862.453.079 (3)130
Symmetry code: (ii) x, y+1, z.

Experimental details

Crystal data
Chemical formula[Sn(C4H9)2(C7H5N2O4)2]
Mr595.17
Crystal system, space groupMonoclinic, C2/c
Temperature (K)298
a, b, c (Å)14.356 (4), 9.006 (2), 20.155 (5)
β (°) 106.305 (4)
V3)2501.0 (11)
Z4
Radiation typeMo Kα
µ (mm1)1.08
Crystal size (mm)0.48 × 0.44 × 0.18
Data collection
DiffractometerBruker SMART APEX CCD area-detector
diffractometer
Absorption correctionMulti-scan
(SADABS; Bruker, 2000)
Tmin, Tmax0.626, 0.830
No. of measured, independent and
observed [I > 2σ(I)] reflections
6494, 2328, 2257
Rint0.015
(sin θ/λ)max1)0.606
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.022, 0.060, 1.14
No. of reflections2328
No. of parameters160
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.43, 0.29

Computer programs: SMART (Bruker, 2000), SAINT (Bruker, 2000), SAINT, SHELXTL (Sheldrick, 1997), SHELXTL, PARST (Nardelli, 1995) and PLATON (Spek, 2003).

Selected geometric parameters (Å, º) top
Sn1—O42.1238 (15)Sn1—O32.4665 (16)
Sn1—C82.127 (2)
O4—Sn1—O4i85.68 (8)C8i—Sn1—O389.31 (8)
C8i—Sn1—C8143.56 (14)C8—Sn1—O384.95 (8)
O4—Sn1—O356.37 (6)O3—Sn1—O3i161.57 (7)
O4i—Sn1—O3142.05 (5)
Symmetry code: (i) x+1, y, z+1/2.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N2—H2B···O30.862.022.665 (3)132
N2—H2A···O2ii0.862.473.036 (3)124
N2—H2B···O1ii0.862.453.079 (3)130
Symmetry code: (ii) x, y+1, z.
 

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