Literature DB >> 24454227

2,9-Dimethyl-1,10-phenanthrolin-1-ium 2,4,5-tri-carb-oxy-benzoate monohydrate.

Kai-Long Zhong1.   

Abstract

In the preparation of the title hydrated salt, C14H13N2 (+)·C10H5O8 (-)·H2O, a proton has been transfered to the 2,9-dimethyl-1,10-phenanthrolinium cation, forming a 2,4,5-tri-carb-oxy-benzoate anion. In the anion, the mean planes of the protonated carboxyl-ate groups form dihedral angles of 11.0 (5), 4.4 (5) and 80.3 (4)° with the benzene ring to which they are attached. The mean plane of the deprotonated carboxyl-ate group forms a dihedral angle of 10.6 (5)° with the benzene ring. In the crystal, the anions are involved in carb-oxy-lic acid O-H⋯Ocarbox-yl hydrogen bonds, generating a two-dimensional network parallel to (001) containing R 4 (4)(28) and R 4 (4)(32) motifs. The 2,9-dimethyl-1,10-phenanthrolinium cations and water mol-ecules reside between the anion layers and are connected to the anions via N-H⋯Owater and Owater-H⋯Ocarbox-yl hydrogen bonds. An intra-molecular O-H⋯O hydrogen bond is also observed in the anion.

Entities:  

Year:  2013        PMID: 24454227      PMCID: PMC3885051          DOI: 10.1107/S1600536813030857

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


Related literature

For related structures, see: Adams & Ramdas (1978 ▶); Mrvos-Sermek et al. (1996) ▶; Sun et al. (2002a ▶,b ▶); Zhu et al. (2002 ▶); Li et al. (2003 ▶; 2006 ▶); Oscar et al. (2008 ▶). For background to mol­ecular recognition and supra­molecular chemistry, see: Batten & Robson (1998 ▶); Juan et al. (2002 ▶); Qiu et al. (2008 ▶). For hydrogen-bond graph-set notation, see: Bernstein et al. (1995 ▶).

Experimental

Crystal data

C14H13N2C10H5O8 −·H2O M = 480.42 Orthorhombic, a = 7.1135 (8) Å b = 19.4512 (11) Å c = 30.800 (2) Å V = 4261.7 (6) Å3 Z = 8 Mo Kα radiation μ = 0.12 mm−1 T = 223 K 0.35 × 0.20 × 0.15 mm

Data collection

Rigaku Mercury CCD diffractometer Absorption correction: multi-scan (REQAB; Jacobson, 1998 ▶) T min = 0.468, T max = 1.000 19580 measured reflections 4346 independent reflections 2278 reflections with I > 2σ(I) R int = 0.173

Refinement

R[F 2 > 2σ(F 2)] = 0.088 wR(F 2) = 0.272 S = 1.00 4346 reflections 316 parameters 3 restraints H-atom parameters constrained Δρmax = 0.37 e Å−3 Δρmin = −0.40 e Å−3 Data collection: CrystalClear (Rigaku, 2007 ▶); 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 ▶), PLATON (Spek, 2009 ▶) and Mercury (Macrae et al., 2008 ▶); software used to prepare material for publication: SHELXTL. Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536813030857/lh5664sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536813030857/lh5664Isup2.hkl Click here for additional data file. Supplementary material file. DOI: 10.1107/S1600536813030857/lh5664Isup3.cml Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C14H13N2+·C10H5O8·H2OF(000) = 2000
Mr = 480.42Dx = 1.498 Mg m3
Orthorhombic, PbcaMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2abCell parameters from 2016 reflections
a = 7.1135 (8) Åθ = 3.4–26.0°
b = 19.4512 (11) ŵ = 0.12 mm1
c = 30.800 (2) ÅT = 223 K
V = 4261.7 (6) Å3Block, colourless
Z = 80.35 × 0.20 × 0.15 mm
Rigaku Mercury CCD diffractometer4346 independent reflections
Radiation source: fine-focus sealed tube2278 reflections with I > 2σ(I)
Graphite Monochromator monochromatorRint = 0.173
Detector resolution: 28.5714 pixels mm-1θmax = 26.4°, θmin = 2.9°
ω scansh = −8→7
Absorption correction: multi-scan (REQAB; Jacobson, 1998)k = −24→23
Tmin = 0.468, Tmax = 1.000l = −38→30
19580 measured reflections
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.088Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.272H-atom parameters constrained
S = 1.00w = 1/[σ2(Fo2) + (0.1341P)2] where P = (Fo2 + 2Fc2)/3
4346 reflections(Δ/σ)max < 0.001
316 parametersΔρmax = 0.37 e Å3
3 restraintsΔρmin = −0.40 e Å3
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.
xyzUiso*/Ueq
O10.2749 (5)0.08753 (12)0.04898 (9)0.0620 (10)
O1W0.9045 (6)0.17263 (15)0.15048 (10)0.0773 (11)
H1WA0.83210.18630.13160.116*
H1WB0.97320.20390.15860.116*
O20.1964 (5)0.09431 (13)−0.01923 (9)0.0687 (11)
H20.16690.1239−0.03690.103*
O30.1453 (4)0.18081 (12)−0.07332 (9)0.0514 (8)
O40.1828 (5)0.29265 (13)−0.08131 (10)0.0607 (9)
O50.1946 (5)0.45577 (12)0.02561 (9)0.0710 (11)
H50.19410.49580.03400.106*
O60.1961 (6)0.43455 (14)0.09547 (10)0.0814 (12)
O70.1129 (5)0.29909 (14)0.15299 (9)0.0570 (9)
O80.4094 (5)0.32175 (13)0.13965 (9)0.0526 (8)
H80.48120.32030.11890.079*
N10.3348 (5)0.04067 (14)0.32309 (11)0.0418 (8)
H1A0.37560.08200.32610.050*
N20.4269 (5)0.12165 (13)0.25335 (10)0.0387 (8)
C10.2968 (6)0.0044 (2)0.35906 (14)0.0505 (11)
C20.2298 (6)−0.0628 (2)0.35368 (16)0.0565 (12)
H2B0.2018−0.08920.37800.068*
C30.2051 (6)−0.0901 (2)0.31345 (16)0.0540 (12)
H3A0.1608−0.13480.31070.065*
C40.2457 (6)−0.05151 (18)0.27592 (15)0.0464 (10)
C50.2205 (6)−0.07699 (19)0.23280 (16)0.0510 (11)
H5A0.1792−0.12180.22850.061*
C60.2559 (6)−0.0366 (2)0.19861 (16)0.0498 (11)
H6A0.2354−0.05390.17090.060*
C70.3240 (6)0.03194 (17)0.20314 (13)0.0403 (9)
C80.3644 (6)0.0762 (2)0.16851 (14)0.0488 (10)
H8A0.34210.06210.14010.059*
C90.4360 (6)0.13951 (19)0.17649 (13)0.0473 (10)
H9A0.46480.16860.15350.057*
C100.4672 (6)0.16161 (16)0.21950 (12)0.0416 (10)
C110.3565 (5)0.05828 (17)0.24523 (12)0.0382 (9)
C120.3122 (5)0.01557 (17)0.28188 (13)0.0397 (10)
C130.3258 (8)0.0376 (2)0.40228 (16)0.0716 (15)
H13A0.37280.08340.39820.107*
H13B0.41490.01130.41880.107*
H13C0.20840.03940.41760.107*
C140.5500 (6)0.23092 (17)0.22864 (14)0.0505 (11)
H14A0.55980.23750.25950.076*
H14B0.47060.26590.21650.076*
H14C0.67280.23380.21580.076*
C280.2079 (5)0.20013 (15)0.02367 (12)0.0357 (9)
C290.1912 (5)0.25062 (16)−0.00893 (13)0.0350 (9)
C300.1867 (5)0.31977 (17)0.00395 (12)0.0378 (9)
H30A0.17560.3535−0.01730.045*
C310.1979 (5)0.33993 (16)0.04710 (12)0.0376 (9)
C320.2144 (6)0.28974 (16)0.07952 (12)0.0389 (10)
C330.2186 (6)0.22157 (17)0.06673 (12)0.0394 (9)
H33A0.22910.18810.08810.047*
C340.2288 (7)0.12280 (18)0.01805 (14)0.0471 (11)
C350.1756 (6)0.24134 (18)−0.05812 (13)0.0411 (10)
C360.1967 (6)0.41454 (17)0.05910 (13)0.0457 (11)
C370.2376 (7)0.30587 (16)0.12675 (13)0.0428 (10)
U11U22U33U12U13U23
O10.119 (3)0.0212 (13)0.0460 (18)0.0077 (14)−0.0028 (17)−0.0004 (12)
O1W0.107 (3)0.066 (2)0.058 (2)−0.0367 (18)−0.023 (2)0.0200 (15)
O20.131 (3)0.0301 (14)0.0452 (18)0.0046 (16)−0.0161 (18)−0.0095 (13)
O30.077 (2)0.0359 (14)0.0416 (17)0.0044 (13)−0.0108 (15)−0.0086 (12)
O40.095 (3)0.0408 (16)0.0464 (18)−0.0027 (14)−0.0044 (17)0.0012 (14)
O50.149 (4)0.0180 (13)0.0458 (19)−0.0050 (15)−0.0022 (19)0.0033 (12)
O60.171 (4)0.0306 (15)0.0427 (19)0.0046 (17)0.000 (2)−0.0069 (14)
O70.075 (2)0.0492 (17)0.0465 (18)−0.0069 (14)0.0186 (17)−0.0076 (13)
O80.072 (2)0.0489 (15)0.0371 (16)−0.0054 (14)−0.0002 (15)−0.0068 (12)
N10.054 (2)0.0278 (15)0.044 (2)0.0022 (14)0.0008 (16)0.0035 (14)
N20.048 (2)0.0261 (14)0.0421 (19)0.0036 (13)−0.0007 (16)0.0003 (13)
C10.057 (3)0.042 (2)0.053 (3)0.0034 (19)−0.001 (2)0.0130 (19)
C20.059 (3)0.040 (2)0.071 (3)0.005 (2)0.006 (3)0.022 (2)
C30.052 (3)0.033 (2)0.078 (3)0.0028 (18)0.009 (2)0.009 (2)
C40.043 (2)0.0283 (18)0.068 (3)0.0023 (16)0.001 (2)0.0029 (19)
C50.046 (3)0.030 (2)0.077 (3)−0.0055 (17)−0.003 (2)−0.014 (2)
C60.051 (3)0.043 (2)0.056 (3)0.0024 (19)−0.001 (2)−0.016 (2)
C70.045 (2)0.0305 (19)0.045 (2)0.0050 (15)−0.0001 (19)−0.0067 (17)
C80.054 (3)0.053 (2)0.039 (2)0.008 (2)−0.002 (2)−0.0088 (19)
C90.056 (3)0.043 (2)0.044 (2)0.0074 (19)0.005 (2)0.0094 (18)
C100.049 (3)0.0318 (17)0.044 (2)0.0032 (16)−0.0029 (19)0.0021 (16)
C110.042 (2)0.0335 (18)0.039 (2)0.0060 (16)0.0018 (18)−0.0017 (16)
C120.040 (2)0.0285 (18)0.051 (3)0.0043 (15)−0.0003 (19)−0.0022 (17)
C130.109 (5)0.058 (3)0.048 (3)0.000 (3)−0.002 (3)0.015 (2)
C140.066 (3)0.034 (2)0.052 (3)−0.0008 (19)0.004 (2)0.0064 (18)
C280.047 (2)0.0222 (17)0.038 (2)−0.0023 (14)−0.0021 (17)−0.0018 (15)
C290.041 (2)0.0259 (17)0.038 (2)−0.0004 (15)0.0001 (17)−0.0025 (15)
C300.051 (3)0.0236 (17)0.039 (2)−0.0029 (16)−0.0039 (18)0.0019 (15)
C310.051 (3)0.0217 (16)0.040 (2)0.0003 (15)0.0012 (18)−0.0030 (15)
C320.057 (3)0.0230 (17)0.037 (2)−0.0001 (15)0.0026 (18)−0.0014 (15)
C330.056 (3)0.0260 (17)0.036 (2)−0.0019 (16)0.0024 (19)0.0029 (15)
C340.071 (3)0.0235 (18)0.047 (2)−0.0011 (17)0.007 (2)−0.0012 (18)
C350.050 (3)0.033 (2)0.040 (2)0.0016 (16)−0.0026 (19)−0.0037 (17)
C360.074 (3)0.0215 (18)0.041 (2)0.0029 (17)0.005 (2)−0.0009 (17)
C370.070 (3)0.0175 (16)0.041 (2)−0.0042 (17)−0.002 (2)−0.0005 (16)
O1—C341.219 (5)C6—C71.426 (5)
O1W—H1WA0.8199C6—H6A0.9300
O1W—H1WB0.8200C7—C81.400 (6)
O2—C341.296 (5)C7—C111.413 (5)
O2—H20.8200C8—C91.356 (5)
O3—C351.285 (4)C8—H8A0.9300
O4—C351.228 (5)C9—C101.410 (5)
O5—C361.307 (5)C9—H9A0.9300
O5—H50.8200C10—C141.498 (5)
O6—C361.186 (5)C11—C121.436 (5)
O7—C371.208 (5)C13—H13A0.9600
O8—C371.321 (5)C13—H13B0.9600
O8—H80.8200C13—H13C0.9600
N1—C11.341 (5)C14—H14A0.9600
N1—C121.369 (5)C14—H14B0.9600
N1—H1A0.8600C14—H14C0.9600
N2—C101.331 (4)C28—C331.392 (5)
N2—C111.354 (5)C28—C291.409 (5)
C1—C21.401 (6)C28—C341.521 (5)
C1—C131.494 (6)C29—C301.403 (5)
C2—C31.359 (6)C29—C351.530 (6)
C2—H2B0.9300C30—C311.388 (5)
C3—C41.408 (6)C30—H30A0.9300
C3—H3A0.9300C31—C321.402 (5)
C4—C121.400 (5)C31—C361.498 (5)
C4—C51.429 (6)C32—C331.384 (5)
C5—C61.337 (6)C32—C371.497 (5)
C5—H5A0.9300C33—H33A0.9300
H1WA—O1W—H1WB110.5C4—C12—C11120.7 (4)
C34—O2—H2109.5C1—C13—H13A109.5
C36—O5—H5109.5C1—C13—H13B109.5
C37—O8—H8109.5H13A—C13—H13B109.5
C1—N1—C12123.7 (3)C1—C13—H13C109.5
C1—N1—H1A118.2H13A—C13—H13C109.5
C12—N1—H1A118.2H13B—C13—H13C109.5
C10—N2—C11117.8 (3)C10—C14—H14A109.5
N1—C1—C2117.5 (4)C10—C14—H14B109.5
N1—C1—C13118.7 (4)H14A—C14—H14B109.5
C2—C1—C13123.8 (4)C10—C14—H14C109.5
C3—C2—C1121.0 (4)H14A—C14—H14C109.5
C3—C2—H2B119.5H14B—C14—H14C109.5
C1—C2—H2B119.5C33—C28—C29118.3 (3)
C2—C3—C4121.0 (4)C33—C28—C34113.5 (3)
C2—C3—H3A119.5C29—C28—C34128.0 (3)
C4—C3—H3A119.5C30—C29—C28118.0 (3)
C12—C4—C3117.3 (4)C30—C29—C35113.0 (3)
C12—C4—C5119.2 (4)C28—C29—C35129.0 (3)
C3—C4—C5123.6 (4)C31—C30—C29122.7 (3)
C6—C5—C4120.3 (3)C31—C30—H30A118.6
C6—C5—H5A119.8C29—C30—H30A118.6
C4—C5—H5A119.8C30—C31—C32119.4 (3)
C5—C6—C7122.4 (4)C30—C31—C36120.7 (3)
C5—C6—H6A118.8C32—C31—C36120.0 (3)
C7—C6—H6A118.8C33—C32—C31117.8 (3)
C8—C7—C11116.3 (3)C33—C32—C37118.4 (3)
C8—C7—C6124.7 (4)C31—C32—C37123.7 (3)
C11—C7—C6119.0 (4)C32—C33—C28123.9 (3)
C9—C8—C7119.8 (4)C32—C33—H33A118.1
C9—C8—H8A120.1C28—C33—H33A118.1
C7—C8—H8A120.1O1—C34—O2120.0 (3)
C8—C9—C10120.4 (4)O1—C34—C28119.6 (3)
C8—C9—H9A119.8O2—C34—C28120.4 (3)
C10—C9—H9A119.8O4—C35—O3122.7 (4)
N2—C10—C9121.6 (3)O4—C35—C29118.5 (3)
N2—C10—C14117.6 (3)O3—C35—C29118.7 (3)
C9—C10—C14120.8 (3)O6—C36—O5123.0 (3)
N2—C11—C7124.1 (3)O6—C36—C31123.4 (3)
N2—C11—C12117.6 (3)O5—C36—C31113.6 (3)
C7—C11—C12118.4 (3)O7—C37—O8120.2 (4)
N1—C12—C4119.6 (3)O7—C37—C32123.1 (4)
N1—C12—C11119.8 (3)O8—C37—C32116.3 (4)
C12—N1—C1—C2−0.2 (6)C7—C11—C12—C42.5 (6)
C12—N1—C1—C13−179.6 (4)C33—C28—C29—C300.1 (6)
N1—C1—C2—C30.2 (7)C34—C28—C29—C30−175.6 (4)
C13—C1—C2—C3179.6 (4)C33—C28—C29—C35−179.5 (4)
C1—C2—C3—C4−0.2 (7)C34—C28—C29—C354.8 (7)
C2—C3—C4—C120.1 (6)C28—C29—C30—C310.0 (6)
C2—C3—C4—C5−179.2 (4)C35—C29—C30—C31179.7 (4)
C12—C4—C5—C6−1.6 (6)C29—C30—C31—C320.0 (6)
C3—C4—C5—C6177.7 (4)C29—C30—C31—C36178.6 (4)
C4—C5—C6—C71.7 (7)C30—C31—C32—C33−0.1 (6)
C5—C6—C7—C8179.6 (4)C36—C31—C32—C33−178.7 (4)
C5—C6—C7—C110.4 (6)C30—C31—C32—C37176.7 (4)
C11—C7—C8—C91.9 (6)C36—C31—C32—C37−2.0 (6)
C6—C7—C8—C9−177.3 (4)C31—C32—C33—C280.2 (6)
C7—C8—C9—C10−1.1 (6)C37—C32—C33—C28−176.7 (4)
C11—N2—C10—C90.7 (6)C29—C28—C33—C32−0.2 (6)
C11—N2—C10—C14−178.3 (3)C34—C28—C33—C32176.1 (4)
C8—C9—C10—N2−0.3 (6)C33—C28—C34—O1−8.9 (6)
C8—C9—C10—C14178.7 (4)C29—C28—C34—O1167.0 (4)
C10—N2—C11—C70.3 (6)C33—C28—C34—O2170.5 (4)
C10—N2—C11—C12−179.6 (3)C29—C28—C34—O2−13.6 (7)
C8—C7—C11—N2−1.6 (6)C30—C29—C35—O48.2 (5)
C6—C7—C11—N2177.7 (3)C28—C29—C35—O4−172.2 (4)
C8—C7—C11—C12178.3 (3)C30—C29—C35—O3−168.0 (3)
C6—C7—C11—C12−2.5 (6)C28—C29—C35—O311.6 (6)
C1—N1—C12—C40.1 (6)C30—C31—C36—O6175.9 (5)
C1—N1—C12—C11180.0 (3)C32—C31—C36—O6−5.4 (7)
C3—C4—C12—N1−0.1 (6)C30—C31—C36—O5−3.5 (6)
C5—C4—C12—N1179.3 (4)C32—C31—C36—O5175.2 (4)
C3—C4—C12—C11−179.9 (4)C33—C32—C37—O7−77.6 (5)
C5—C4—C12—C11−0.6 (6)C31—C32—C37—O7105.7 (5)
N2—C11—C12—N12.6 (5)C33—C32—C37—O895.8 (4)
C7—C11—C12—N1−177.3 (3)C31—C32—C37—O8−81.0 (5)
N2—C11—C12—C4−177.6 (3)
D—H···AD—HH···AD···AD—H···A
O2—H2···O30.821.582.395 (4)171
O5—H5···O1i0.821.862.671 (3)172
O8—H8···O3ii0.821.822.645 (4)178
N1—H1A···O1Wiii0.861.922.738 (4)160
O1W—H1WA···O4ii0.821.922.735 (4)171
O1W—H1WB···O7iv0.822.112.873 (4)155
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A D—HH⋯A DA D—H⋯A
O2—H2⋯O30.821.582.395 (4)171
O5—H5⋯O1i 0.821.862.671 (3)172
O8—H8⋯O3ii 0.821.822.645 (4)178
N1—H1A⋯O1W iii 0.861.922.738 (4)160
O1W—H1WA⋯O4ii 0.821.922.735 (4)171
O1W—H1WB⋯O7iv 0.822.112.873 (4)155

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .

  7 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.  Reversible anion exchange and sensing in large porous materials built from 4,4'-bipyridine via pi...pi and H-bonding interactions.

Authors:  Yongcai Qiu; Zhihui Liu; Yinghua Li; Hong Deng; Ronghua Zeng; Matthias Zeller
Journal:  Inorg Chem       Date:  2008-05-10       Impact factor: 5.165

3.  Engineering the structure and magnetic properties of crystalline solids via the metal-directed self-assembly of a versatile molecular building unit.

Authors:  Juan C Noveron; Myoung Soo Lah; Rico E Del Sesto; Atta M Arif; Joel S Miller; Peter J Stang
Journal:  J Am Chem Soc       Date:  2002-06-12       Impact factor: 15.419

4.  The binary adduct of 3,6,9,16,19,22-hexaazatricyclo[22.2.2.211,14]triaconta-11,13,24,26(1),27,29-hexaene and benzene-1,2,4,5-tetracarboxylic acid.

Authors:  Long-Gen Zhu; Arkady M Ellern; Nenad M Kostić
Journal:  Acta Crystallogr C       Date:  2002-02-13       Impact factor: 1.172

5.  New two-dimensional metal-organic networks constructed from 1,2,4,5-benzenetetracarboxylate and chelate ligands.

Authors:  Yangguang Li; Na Hao; Ying Lu; Enbo Wang; Zhenhui Kang; Changwen Hu
Journal:  Inorg Chem       Date:  2003-05-05       Impact factor: 5.165

6.  1,2,4,5-benzenetetracarboxylate- and 2,2'-bipyrimidine-containing cobalt(II) coordination polymers: preparation, crystal structure, and magnetic properties.

Authors:  Oscar Fabelo; Jorge Pasán; Francesc Lloret; Miguel Julve; Catalina Ruiz-Pérez
Journal:  Inorg Chem       Date:  2008-04-09       Impact factor: 5.165

7.  Structure validation in chemical crystallography.

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

1.  Bis(6-nitro-1,10-phenanthrolin-1-ium) 2,5-di-carb-oxy-terephthalate.

Authors:  Kai-Long Zhong; Chao Ni
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2014-02-08
  1 in total

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