Literature DB >> 22199517

Tetra-aqua-bis-[1-(3-carb-oxy-phen-yl)-4,4'-bipyridin-1-ium-κN]zinc bis-(4,5-carb-oxy-benzene-1,2-dicarboxyl-ate) 2.5-hydrate.

Jie Zhang1, Yi Tan, Zhiyong Fu.   

Abstract

In the complex cation of the title compound, [Zn(C(17)H(13)N(2)O(2))(2)(H(2)O)(4)](C(10)H(4)O(8))(2)·2.5H(2)O, the Zn(II) atom, lying on an inversion center, is coordinated by two N atoms from two N-(3-carb-oxy-phen-yl)-4,4'-bipyridin-1-ium ligands and four water mol-ecules in a distorted octa-hedral geometry. The pyromellitate anion is double deprotonated. O-H⋯O and C-H⋯O hydrogen bonds connect the cations, anions and uncoordinated water mol-ecules into a three-dimensional supra-molecular network. One of the two lattice water molecules shows an occupancy of 0.25. An intra-molecular O-H⋯O hydrogen bond is present in the anion.

Entities:  

Year:  2011        PMID: 22199517      PMCID: PMC3238626          DOI: 10.1107/S1600536811045156

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For background to the structures and applications of viologen compounds, see: Ebbesen et al. (1984 ▶); Jin et al. (2010 ▶); Sun et al. (2005 ▶); Xu et al. (2007 ▶).

Experimental

Crystal data

[Zn(C17H13N2O2)2(H2O)4](C10H4O8)2·2.5H2O M = 1241.33 Monoclinic, a = 7.5476 (2) Å b = 19.5528 (4) Å c = 19.2752 (4) Å β = 110.431 (2)° V = 2665.63 (10) Å3 Z = 2 Mo Kα radiation μ = 0.56 mm−1 T = 298 K 0.43 × 0.41 × 0.37 mm

Data collection

Bruker APEX CCD diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▶) T min = 0.781, T max = 0.825 25451 measured reflections 4867 independent reflections 4250 reflections with I > 2σ(I) R int = 0.028

Refinement

R[F 2 > 2σ(F 2)] = 0.031 wR(F 2) = 0.078 S = 1.06 4867 reflections 429 parameters 4 restraints H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.29 e Å−3 Δρmin = −0.36 e Å−3 Data collection: SMART (Bruker, 2007 ▶); cell refinement: SAINT (Bruker, 2007 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: DIAMOND (Brandenburg, 1999 ▶); software used to prepare material for publication: SHELXTL (Sheldrick, 2008 ▶). Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536811045156/hy2468sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536811045156/hy2468Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
[Zn(C17H13N2O2)2(H2O)4](C10H4O8)2·2.5H2OF(000) = 1282
Mr = 1241.33Dx = 1.547 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 4867 reflections
a = 7.5476 (2) Åθ = 3.1–25.4°
b = 19.5528 (4) ŵ = 0.56 mm1
c = 19.2752 (4) ÅT = 298 K
β = 110.431 (2)°Block, yellow
V = 2665.63 (10) Å30.43 × 0.41 × 0.37 mm
Z = 2
Bruker APEX CCD diffractometer4867 independent reflections
Radiation source: fine-focus sealed tube4250 reflections with I > 2σ(I)
graphiteRint = 0.028
φ and ω scansθmax = 25.4°, θmin = 3.1°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)h = −9→8
Tmin = 0.781, Tmax = 0.825k = −23→23
25451 measured reflectionsl = −23→23
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.031Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.078H atoms treated by a mixture of independent and constrained refinement
S = 1.06w = 1/[σ2(Fo2) + (0.0331P)2 + 1.443P] where P = (Fo2 + 2Fc2)/3
4867 reflections(Δ/σ)max = 0.001
429 parametersΔρmax = 0.29 e Å3
4 restraintsΔρmin = −0.36 e Å3
xyzUiso*/UeqOcc. (<1)
Zn10.50000.50000.50000.02391 (9)
O10.5186 (2)1.24085 (7)0.33078 (8)0.0434 (4)
H70.583 (4)1.2716 (14)0.3626 (15)0.065*
O20.6136 (2)1.16786 (7)0.42474 (8)0.0513 (4)
O30.80086 (19)0.50774 (7)0.53939 (8)0.0327 (3)
H10.844 (3)0.4741 (13)0.5221 (13)0.049*
H20.855 (3)0.5404 (13)0.5307 (13)0.049*
O40.4919 (2)0.53685 (7)0.60006 (8)0.0344 (3)
H30.591 (4)0.5432 (13)0.6368 (14)0.052*
H40.423 (3)0.5747 (13)0.5993 (13)0.052*
O50.7710 (4)0.55277 (9)0.05365 (11)0.0879 (8)
O60.7924 (2)0.53366 (8)−0.05325 (9)0.0507 (4)
H90.819 (4)0.5542 (14)−0.0882 (13)0.076*
O70.8657 (3)0.59789 (8)−0.14700 (9)0.0702 (6)
O80.9161 (2)0.70368 (8)−0.17320 (7)0.0464 (4)
O90.9545 (2)0.74468 (7)0.20592 (7)0.0419 (4)
H80.939 (4)0.7691 (13)0.2399 (15)0.063*
O100.9735 (2)0.84566 (7)0.15526 (8)0.0444 (4)
O111.04737 (18)0.89852 (6)0.00847 (7)0.0349 (3)
O121.29187 (17)0.84798 (6)0.09494 (7)0.0313 (3)
O130.8157 (3)0.95061 (10)0.21503 (10)0.0555 (4)
H50.872 (5)0.9152 (19)0.199 (2)0.105 (13)*
H60.816 (5)0.9357 (17)0.257 (2)0.097 (12)*
O140.8680 (18)1.0750 (5)0.2965 (6)0.109 (3)0.25
H100.91 (3)1.062 (10)0.340 (4)0.163*0.25
H110.798 (10)1.044 (3)0.275 (10)0.163*0.25
N10.4598 (2)0.60196 (7)0.45273 (8)0.0267 (3)
N20.3534 (2)0.93790 (7)0.31154 (8)0.0253 (3)
C10.3529 (3)0.61428 (9)0.38216 (11)0.0359 (4)
H1A0.29410.57750.35250.043*
C20.3255 (3)0.67884 (9)0.35108 (11)0.0360 (4)
H2A0.25280.68480.30140.043*
C30.5401 (3)0.65598 (9)0.49434 (10)0.0299 (4)
H3A0.61670.64850.54330.036*
C40.5151 (3)0.72233 (9)0.46828 (10)0.0301 (4)
H4A0.57020.75840.49990.036*
C50.4079 (2)0.73488 (8)0.39504 (10)0.0253 (4)
C60.3860 (2)0.80580 (9)0.36554 (10)0.0256 (4)
C70.3945 (3)0.81976 (9)0.29649 (10)0.0340 (4)
H7A0.41000.78410.26720.041*
C80.3803 (3)0.88552 (9)0.27086 (10)0.0343 (4)
H8A0.38930.89420.22480.041*
C90.3598 (3)0.86071 (9)0.40711 (10)0.0284 (4)
H9A0.35470.85320.45400.034*
C100.3416 (3)0.92569 (9)0.37883 (10)0.0288 (4)
H10A0.32080.96190.40630.035*
C120.3409 (3)1.00795 (8)0.28392 (10)0.0263 (4)
C130.2324 (3)1.02160 (10)0.21080 (10)0.0355 (4)
H13A0.16840.98660.17930.043*
C140.2213 (3)1.08835 (10)0.18574 (11)0.0407 (5)
H14A0.15041.09830.13670.049*
C150.3149 (3)1.14040 (9)0.23309 (10)0.0330 (4)
H15A0.30521.18520.21600.040*
C160.4233 (3)1.12578 (9)0.30622 (10)0.0261 (4)
C170.4371 (2)1.05870 (9)0.33179 (9)0.0265 (4)
H17A0.51031.04830.38050.032*
C180.5277 (3)1.17943 (9)0.36038 (10)0.0290 (4)
C190.8122 (3)0.57302 (10)0.00281 (12)0.0367 (5)
C200.8992 (3)0.65999 (10)−0.13012 (10)0.0311 (4)
C210.9692 (2)0.78374 (9)0.15265 (10)0.0272 (4)
C221.1268 (2)0.84837 (8)0.04705 (9)0.0240 (4)
C230.8857 (2)0.64591 (9)0.00489 (10)0.0252 (4)
C240.9082 (2)0.67918 (9)0.07170 (9)0.0262 (4)
H24A0.87780.65570.10800.031*
C250.9740 (2)0.74564 (9)0.08605 (9)0.0231 (4)
C261.0261 (2)0.78040 (8)0.03287 (9)0.0223 (3)
C270.9965 (2)0.74906 (9)−0.03482 (9)0.0245 (4)
H27A1.02560.7733−0.07100.029*
C280.9254 (2)0.68298 (9)−0.05120 (9)0.0237 (4)
U11U22U33U12U13U23
Zn10.03018 (16)0.01496 (15)0.02675 (16)0.00253 (11)0.01013 (12)0.00130 (11)
O10.0654 (10)0.0207 (7)0.0339 (8)−0.0122 (7)0.0046 (7)0.0038 (6)
O20.0864 (12)0.0321 (8)0.0254 (8)−0.0156 (8)0.0070 (8)0.0014 (6)
O30.0322 (7)0.0228 (7)0.0456 (8)−0.0012 (6)0.0167 (6)−0.0025 (6)
O40.0456 (8)0.0273 (7)0.0299 (7)0.0110 (6)0.0125 (6)−0.0006 (6)
O50.178 (2)0.0368 (10)0.0895 (14)−0.0447 (12)0.0982 (16)−0.0147 (9)
O60.0767 (11)0.0299 (8)0.0470 (9)−0.0207 (8)0.0234 (8)−0.0105 (7)
O70.1403 (18)0.0379 (9)0.0362 (9)−0.0227 (10)0.0359 (10)−0.0152 (7)
O80.0765 (11)0.0419 (9)0.0260 (7)−0.0017 (8)0.0243 (7)0.0016 (6)
O90.0714 (10)0.0359 (8)0.0269 (7)−0.0035 (7)0.0281 (7)−0.0002 (6)
O100.0751 (11)0.0284 (8)0.0404 (8)−0.0017 (7)0.0335 (8)−0.0051 (6)
O110.0391 (7)0.0211 (7)0.0442 (8)0.0020 (6)0.0141 (6)0.0095 (6)
O120.0334 (7)0.0211 (6)0.0359 (7)−0.0047 (5)0.0076 (6)0.0014 (5)
O130.0707 (11)0.0586 (11)0.0343 (9)0.0133 (9)0.0147 (8)0.0069 (8)
O140.142 (9)0.066 (6)0.087 (7)0.003 (6)0.001 (7)−0.007 (5)
N10.0324 (8)0.0173 (7)0.0303 (8)0.0015 (6)0.0108 (7)0.0009 (6)
N20.0356 (8)0.0162 (7)0.0235 (7)0.0000 (6)0.0094 (6)0.0008 (6)
C10.0510 (12)0.0183 (9)0.0312 (10)−0.0001 (8)0.0053 (9)−0.0028 (8)
C20.0529 (12)0.0205 (9)0.0272 (10)0.0028 (8)0.0047 (9)0.0012 (8)
C30.0334 (10)0.0235 (9)0.0282 (10)−0.0008 (8)0.0051 (8)0.0033 (7)
C40.0363 (10)0.0184 (9)0.0313 (10)−0.0048 (7)0.0065 (8)−0.0022 (7)
C50.0310 (9)0.0172 (8)0.0292 (9)0.0023 (7)0.0127 (8)0.0018 (7)
C60.0294 (9)0.0187 (9)0.0270 (9)−0.0001 (7)0.0078 (7)−0.0003 (7)
C70.0573 (12)0.0190 (9)0.0288 (10)0.0031 (8)0.0189 (9)−0.0033 (7)
C80.0582 (12)0.0233 (9)0.0255 (10)0.0008 (9)0.0198 (9)−0.0006 (8)
C90.0421 (10)0.0215 (9)0.0242 (9)0.0005 (8)0.0148 (8)0.0013 (7)
C100.0428 (11)0.0201 (9)0.0268 (9)0.0015 (8)0.0162 (8)−0.0028 (7)
C120.0360 (10)0.0174 (9)0.0263 (9)0.0006 (7)0.0119 (8)0.0035 (7)
C130.0464 (11)0.0254 (10)0.0271 (10)−0.0056 (8)0.0032 (9)−0.0015 (8)
C140.0528 (13)0.0314 (11)0.0254 (10)−0.0017 (9)−0.0021 (9)0.0072 (8)
C150.0443 (11)0.0201 (9)0.0312 (10)−0.0003 (8)0.0091 (9)0.0070 (8)
C160.0340 (9)0.0198 (9)0.0260 (9)0.0000 (7)0.0123 (8)0.0021 (7)
C170.0342 (10)0.0228 (9)0.0217 (9)0.0005 (7)0.0089 (7)0.0030 (7)
C180.0393 (10)0.0227 (9)0.0278 (10)−0.0021 (8)0.0154 (8)0.0013 (7)
C190.0467 (12)0.0244 (10)0.0439 (12)−0.0072 (9)0.0221 (10)−0.0011 (9)
C200.0374 (10)0.0316 (10)0.0240 (9)0.0008 (8)0.0104 (8)−0.0018 (8)
C210.0280 (9)0.0308 (10)0.0239 (9)−0.0018 (7)0.0104 (7)0.0005 (7)
C220.0314 (9)0.0191 (9)0.0260 (9)−0.0012 (7)0.0157 (8)0.0000 (7)
C230.0278 (9)0.0215 (9)0.0267 (9)−0.0029 (7)0.0102 (7)0.0004 (7)
C240.0311 (9)0.0266 (9)0.0240 (9)−0.0022 (7)0.0134 (7)0.0048 (7)
C250.0245 (8)0.0241 (9)0.0203 (8)−0.0009 (7)0.0073 (7)0.0010 (7)
C260.0243 (8)0.0196 (8)0.0232 (8)0.0004 (7)0.0087 (7)0.0018 (7)
C270.0301 (9)0.0227 (9)0.0233 (9)−0.0012 (7)0.0124 (7)0.0045 (7)
C280.0258 (9)0.0234 (9)0.0216 (9)0.0006 (7)0.0077 (7)0.0006 (7)
Zn1—O42.0798 (13)C4—C51.382 (3)
Zn1—O32.1335 (14)C4—H4A0.9300
Zn1—N12.1689 (14)C5—C61.486 (2)
O1—C181.321 (2)C6—C71.382 (3)
O1—H70.88 (3)C6—C91.394 (2)
O2—C181.204 (2)C7—C81.368 (3)
O3—H10.85 (3)C7—H7A0.9300
O3—H20.81 (3)C8—H8A0.9300
O4—H30.84 (3)C9—C101.371 (2)
O4—H40.90 (3)C9—H9A0.9300
O5—C191.195 (2)C10—H10A0.9300
O6—C191.292 (2)C12—C171.377 (2)
O6—H90.867 (17)C12—C131.387 (3)
O7—C201.260 (2)C13—C141.384 (3)
O8—C201.229 (2)C13—H13A0.9300
O9—C211.315 (2)C14—C151.385 (3)
O9—H80.85 (3)C14—H14A0.9300
O10—C211.212 (2)C15—C161.390 (3)
O11—C221.250 (2)C15—H15A0.9300
O12—C221.266 (2)C16—C171.392 (2)
O13—H50.92 (4)C16—C181.496 (2)
O13—H60.87 (4)C17—H17A0.9300
O14—H100.82 (2)C19—C231.525 (2)
O14—H110.82 (2)C20—C281.531 (2)
N1—C31.337 (2)C21—C251.496 (2)
N1—C11.339 (2)C22—C261.508 (2)
N2—C81.348 (2)C23—C241.399 (2)
N2—C101.352 (2)C23—C281.418 (2)
N2—C121.460 (2)C24—C251.384 (2)
C1—C21.382 (3)C24—H24A0.9300
C1—H1A0.9300C25—C261.396 (2)
C2—C51.392 (3)C26—C271.387 (2)
C2—H2A0.9300C27—C281.392 (2)
C3—C41.380 (2)C27—H27A0.9300
C3—H3A0.9300
O4i—Zn1—O4180.0C10—C9—H9A120.0
O4i—Zn1—O3i91.02 (6)C6—C9—H9A120.0
O4—Zn1—O3i88.98 (6)N2—C10—C9120.95 (16)
O4i—Zn1—O388.98 (6)N2—C10—H10A119.5
O4—Zn1—O391.02 (6)C9—C10—H10A119.5
O3i—Zn1—O3180.0C17—C12—C13121.91 (16)
O4i—Zn1—N188.50 (5)C17—C12—N2118.68 (15)
O4—Zn1—N191.50 (5)C13—C12—N2119.41 (16)
O3i—Zn1—N186.58 (5)C14—C13—C12118.60 (17)
O3—Zn1—N193.42 (5)C14—C13—H13A120.7
O4i—Zn1—N1i91.50 (5)C12—C13—H13A120.7
O4—Zn1—N1i88.50 (5)C13—C14—C15120.55 (18)
O3i—Zn1—N1i93.42 (5)C13—C14—H14A119.7
O3—Zn1—N1i86.58 (5)C15—C14—H14A119.7
N1—Zn1—N1i180.00 (8)C14—C15—C16120.09 (17)
C18—O1—H7113.0 (17)C14—C15—H15A120.0
Zn1—O3—H1107.9 (16)C16—C15—H15A120.0
Zn1—O3—H2122.5 (17)C15—C16—C17119.83 (16)
H1—O3—H2104 (2)C15—C16—C18122.93 (16)
Zn1—O4—H3121.7 (17)C17—C16—C18117.23 (16)
Zn1—O4—H4118.2 (15)C12—C17—C16119.02 (16)
H3—O4—H4103 (2)C12—C17—H17A120.5
C19—O6—H9112 (2)C16—C17—H17A120.5
C21—O9—H8110.3 (18)O2—C18—O1122.97 (17)
H5—O13—H6102 (3)O2—C18—C16123.40 (16)
H10—O14—H11104 (10)O1—C18—C16113.63 (16)
C3—N1—C1116.98 (15)O5—C19—O6120.08 (19)
C3—N1—Zn1120.43 (12)O5—C19—C23119.00 (18)
C1—N1—Zn1122.58 (12)O6—C19—C23120.91 (17)
C8—N2—C10119.85 (15)O8—C20—O7123.68 (18)
C8—N2—C12120.28 (14)O8—C20—C28117.35 (16)
C10—N2—C12119.85 (14)O7—C20—C28118.95 (16)
N1—C1—C2123.42 (17)O10—C21—O9123.79 (17)
N1—C1—H1A118.3O10—C21—C25121.67 (16)
C2—C1—H1A118.3O9—C21—C25114.51 (16)
C1—C2—C5119.20 (17)O11—C22—O12125.74 (16)
C1—C2—H2A120.4O11—C22—C26118.48 (15)
C5—C2—H2A120.4O12—C22—C26115.63 (15)
N1—C3—C4123.26 (17)C24—C23—C28118.29 (15)
N1—C3—H3A118.4C24—C23—C19112.65 (15)
C4—C3—H3A118.4C28—C23—C19129.02 (16)
C3—C4—C5119.72 (17)C25—C24—C23122.71 (15)
C3—C4—H4A120.1C25—C24—H24A118.6
C5—C4—H4A120.1C23—C24—H24A118.6
C4—C5—C2117.37 (16)C24—C25—C26118.93 (15)
C4—C5—C6120.26 (16)C24—C25—C21121.64 (15)
C2—C5—C6122.36 (16)C26—C25—C21119.03 (15)
C7—C6—C9117.70 (16)C27—C26—C25118.78 (15)
C7—C6—C5121.10 (15)C27—C26—C22117.73 (15)
C9—C6—C5121.18 (16)C25—C26—C22123.32 (15)
C8—C7—C6120.62 (17)C26—C27—C28123.08 (15)
C8—C7—H7A119.7C26—C27—H27A118.5
C6—C7—H7A119.7C28—C27—H27A118.5
N2—C8—C7120.86 (17)C27—C28—C23117.96 (15)
N2—C8—H8A119.6C27—C28—C20113.79 (15)
C7—C8—H8A119.6C23—C28—C20128.25 (16)
C10—C9—C6119.99 (16)
D—H···AD—HH···AD···AD—H···A
O1—H7···O12ii0.87 (2)1.80 (3)2.656 (3)164 (3)
O3—H1···O11iii0.85 (2)1.88 (3)2.732 (2)175 (3)
O3—H2···O11iv0.81 (3)2.03 (2)2.820 (4)163 (2)
O4—H3···O13iv0.84 (2)1.84 (3)2.677 (6)175 (3)
O4—H4···O12v0.90 (3)1.79 (4)2.694 (2)177 (4)
O6—H9···O70.87 (3)1.56 (3)2.418 (2)174 (3)
O9—H8···O8iv0.85 (3)1.82 (3)2.646 (3)163 (4)
O13—H5···O100.92 (4)1.90 (2)2.813 (3)174 (3)
O13—H6···O7iv0.87 (4)1.86 (4)2.723 (2)169 (3)
O14—H11···O130.82 (2)2.18 (2)2.846 (2)138 (2)
C7—H7A···O1vi0.932.303.155 (2)153
C8—H8A···O12vii0.932.523.302 (2)142
C9—H9A···O2viii0.932.303.225 (2)172
C10—H10A···O5ix0.932.153.060 (3)167
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
O1—H7⋯O12i0.87 (2)1.80 (3)2.656 (3)164 (3)
O3—H1⋯O11ii0.85 (2)1.88 (3)2.732 (2)175 (3)
O3—H2⋯O11iii0.81 (3)2.03 (2)2.820 (4)163 (2)
O4—H3⋯O13iii0.84 (2)1.84 (3)2.677 (6)175 (3)
O4—H4⋯O12iv0.90 (3)1.79 (4)2.694 (2)177 (4)
O6—H9⋯O70.87 (3)1.56 (3)2.418 (2)174 (3)
O9—H8⋯O8iii0.85 (3)1.82 (3)2.646 (3)163 (4)
O13—H5⋯O100.92 (4)1.90 (2)2.813 (3)174 (3)
O13—H6⋯O7iii0.87 (4)1.86 (4)2.723 (2)169 (3)
O14—H11⋯O130.82 (2)2.18 (2)2.846 (2)138 (2)
C7—H7A⋯O1v0.932.303.155 (2)153
C8—H8A⋯O12vi0.932.523.302 (2)142
C9—H9A⋯O2vii0.932.303.225 (2)172
C10—H10A⋯O5viii0.932.153.060 (3)167

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) ; (v) ; (vi) ; (vii) ; (viii) .

  3 in total

1.  Conformational and photosensitive adjustment of the 4,4'-bipyridinium in Mn(II) coordination complexes.

Authors:  Xu-Hui Jin; Jian-Ke Sun; Xi-Ming Xu; Zhao-Hui Li; Jie Zhang
Journal:  Chem Commun (Camb)       Date:  2010-06-03       Impact factor: 6.222

2.  Photochromism of a methyl viologen bismuth(III) chloride: structural variation before and after UV irradiation.

Authors:  Gang Xu; Guo-Cong Guo; Ming-Sheng Wang; Zhang-Jing Zhang; Wen-Tong Chen; Jin-Shun Huang
Journal:  Angew Chem Int Ed Engl       Date:  2007       Impact factor: 15.336

3.  A short history of SHELX.

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

  3 in total

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