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The binaphthol backbone in the title compound, C28H21NO2·C2H5OH, suggests that it has potential for use in asymmetric synthesis with both hydr­oxy groups and the imino group providing sites for coordination with metal ions as an O/N heterotridentate ligand. There is one intra­molecular O—H...N hydrogen bond that forms a five-membered ring and two inter­molecular O—H...O hydrogen bonds to the ethanol solvent, linking two ethanol mol­ecules and two naphthol mol­ecules around a center of symmetry.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807031832/fl2134sup1.cif
Contains datablocks I, global

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536807031832/fl2134Isup2.hkl
Contains datablock I

CCDC reference: 657760

Key indicators

  • Single-crystal X-ray study
  • T = 292 K
  • Mean [sigma](C-C) = 0.005 Å
  • R factor = 0.059
  • wR factor = 0.188
  • Data-to-parameter ratio = 13.8

checkCIF/PLATON results

No syntax errors found



Alert level C WEIGH01_ALERT_1_C Extra text has been found in the _refine_ls_weighting_scheme field. This should be in the _refine_ls_weighting_details field. Weighting scheme given as calc w=1/[\s^2^(Fo^2^)+(0.1107P)^2^] where Weighting scheme identified as calc PLAT026_ALERT_3_C Ratio Observed / Unique Reflections too Low .... 47 Perc. PLAT152_ALERT_1_C Supplied and Calc Volume s.u. Inconsistent ..... ? PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ... 5
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 4 ALERT level C = Check and explain 0 ALERT level G = General alerts; check 2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 0 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 0 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
checkCIF publication errors
Alert level A PUBL022_ALERT_1_A There is a mismatched ~ on line 167 C~28~H~21~NO~2~.C~2~H~5~O~H, indicates If you require a ~ then it should be escaped with a \, i.e. \~ Otherwise there must be a matching closing ~, e.g. C~2~H~4~
1 ALERT level A = Data missing that is essential or data in wrong format 0 ALERT level G = General alerts. Data that may be required is missing

Comment top

Copper and manganese complexes containing Schiff bases as ligands have potential interest in homogeneous catalysis(Raffaelli et al., 1998).In this paper, we present and X-ray crystallographic analysis of the title compound (I), as a continuation of our previous studies. The binol backbone indicates that it has potential as a ligand in asymmetric synthesis.

As shown in Fig. 1, an intramolecular O—H···N hydrogen bond forms a five–membered ring. Both hydroxyl group and the imino moiety provide potential sites for coordination with metal ions as a O/N heterotridenate ligand.

The compounds (I) are connected by O—H···O hydrogen bonds to the ethanol, Fig 2.

In the crystal structure there are close approaches between the ring systems in neighboring molecules, for example, C11–15, 20 and C11–15, 20 rings, C11–15, 20 and C15–20 rings, and C11–15, 20 and C22–27 rings, the corresponding distances between ring centroids are 3.875 Å, 3.956Å and 4.110 Å.

Related literature top

For background on the application of salen complexes to asymmetric catalysis see: Raffaelli et al. (1998); for synthesis see Chin et al. (2004).

Experimental top

The salen ligand, 3-((p-tolylimino)methyl)-di-1,1'-binaphthol was prepared by condensation of 3-carboxaldehyde-1,1'-binaphthol with p-toluidine, which was prepared in reported methods (Chin, J. et al., 2004).Crystals suitable for X-ray analysis were obtained by slow evaporation of a ethanol /methylene chloride (1:5) solution of the compound.

Refinement top

H2 was located in a difference Fourier map and refined with restraints on the O—H distance. The remaining H atoms were placed in calculated positions and refined in the riding-model approximation.

Structure description top

Copper and manganese complexes containing Schiff bases as ligands have potential interest in homogeneous catalysis(Raffaelli et al., 1998).In this paper, we present and X-ray crystallographic analysis of the title compound (I), as a continuation of our previous studies. The binol backbone indicates that it has potential as a ligand in asymmetric synthesis.

As shown in Fig. 1, an intramolecular O—H···N hydrogen bond forms a five–membered ring. Both hydroxyl group and the imino moiety provide potential sites for coordination with metal ions as a O/N heterotridenate ligand.

The compounds (I) are connected by O—H···O hydrogen bonds to the ethanol, Fig 2.

In the crystal structure there are close approaches between the ring systems in neighboring molecules, for example, C11–15, 20 and C11–15, 20 rings, C11–15, 20 and C15–20 rings, and C11–15, 20 and C22–27 rings, the corresponding distances between ring centroids are 3.875 Å, 3.956Å and 4.110 Å.

For background on the application of salen complexes to asymmetric catalysis see: Raffaelli et al. (1998); for synthesis see Chin et al. (2004).

Computing details top

Data collection: DIFRAC (Gabe & White, 1993); cell refinement: DIFRAC; data reduction: NRCVAX (Gabe et al., 1989); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Version 1.2; Bruno et al., 2002); software used to prepare material for publication: SHELXL97.

Figures top
[Figure 1] Fig. 1. A perspective view, with displacement ellipsoids drawn at the 30% propability level.
[Figure 2] Fig. 2. Intermolecular hydrogen bonding in the crystal structure of (I).
3-(p-Tolyliminomethyl)-1,1'-binaphthol ethanol solvate top
Crystal data top
C28H21NO2·C2H6OZ = 2
Mr = 449.53F(000) = 476
Triclinic, P1Dx = 1.250 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 10.540 (5) ÅCell parameters from 24 reflections
b = 10.740 (3) Åθ = 4.8–9.1°
c = 10.779 (3) ŵ = 0.08 mm1
α = 82.17 (2)°T = 292 K
β = 83.82 (3)°Block, orange
γ = 82.89 (3)°0.26 × 0.25 × 0.13 mm
V = 1194.4 (8) Å3
Data collection top
Enraf–Nonius CAD-4
diffractometer
Rint = 0.010
Radiation source: fine-focus sealed tubeθmax = 25.5°, θmin = 1.9°
Graphite monochromatorh = 1212
ω/2θ scansk = 412
4426 measured reflectionsl = 1213
4391 independent reflections3 standard reflections every 300 reflections
2054 reflections with I > 2σ(I) intensity decay: 3.2%
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)] = 0.059Hydrogen site location: mixed
wR(F2) = 0.188H atoms treated by a mixture of independent and constrained refinement
S = 0.94 w = 1/[\s^2^(Fo^2^) + (0.1107P)^2^]
where P = (Fo^2^ + 2Fc^2^)/3
4391 reflections(Δ/σ)max < 0.001
319 parametersΔρmax = 0.21 e Å3
0 restraintsΔρmin = 0.24 e Å3
Crystal data top
C28H21NO2·C2H6Oγ = 82.89 (3)°
Mr = 449.53V = 1194.4 (8) Å3
Triclinic, P1Z = 2
a = 10.540 (5) ÅMo Kα radiation
b = 10.740 (3) ŵ = 0.08 mm1
c = 10.779 (3) ÅT = 292 K
α = 82.17 (2)°0.26 × 0.25 × 0.13 mm
β = 83.82 (3)°
Data collection top
Enraf–Nonius CAD-4
diffractometer
Rint = 0.010
4426 measured reflections3 standard reflections every 300 reflections
4391 independent reflections intensity decay: 3.2%
2054 reflections with I > 2σ(I)
Refinement top
R[F2 > 2σ(F2)] = 0.0590 restraints
wR(F2) = 0.188H atoms treated by a mixture of independent and constrained refinement
S = 0.94Δρmax = 0.21 e Å3
4391 reflectionsΔρmin = 0.24 e Å3
319 parameters
Special details top

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
O10.0738 (2)0.3272 (2)0.5630 (2)0.0734 (7)
H10.05340.37800.61390.110 (11)*
O20.0508 (2)0.27804 (19)0.2159 (2)0.0599 (6)
H20.007 (4)0.264 (4)0.164 (4)0.100 (15)*
N0.0886 (2)0.1489 (2)0.1058 (2)0.0507 (6)
C10.3334 (3)0.3271 (2)0.3103 (3)0.0466 (7)
C20.3843 (3)0.2626 (3)0.2077 (3)0.0569 (8)
H2A0.34790.19200.19290.073 (2)*
C30.4861 (3)0.3018 (3)0.1295 (3)0.0709 (10)
H30.51790.25770.06220.073 (2)*
C40.5433 (3)0.4069 (3)0.1490 (3)0.0729 (10)
H40.61200.43300.09420.073 (2)*
C50.4991 (3)0.4711 (3)0.2475 (3)0.0623 (8)
H50.53870.54040.26050.073 (2)*
C60.3942 (3)0.4345 (2)0.3307 (3)0.0489 (7)
C70.3423 (3)0.5013 (3)0.4312 (3)0.0567 (8)
H70.38120.57010.44650.073 (2)*
C80.2379 (3)0.4687 (3)0.5060 (3)0.0611 (8)
H80.20450.51630.57030.073 (2)*
C90.1779 (3)0.3613 (2)0.4873 (3)0.0510 (7)
C100.2273 (3)0.2907 (2)0.3919 (3)0.0454 (7)
C110.1714 (3)0.1708 (2)0.3783 (2)0.0451 (7)
C120.0883 (3)0.1695 (2)0.2894 (3)0.0455 (7)
C130.0378 (3)0.0548 (2)0.2726 (2)0.0445 (7)
C140.0729 (3)0.0547 (2)0.3489 (2)0.0450 (7)
H140.03880.12840.34000.073 (2)*
C150.1591 (3)0.0574 (2)0.4397 (2)0.0440 (7)
C160.1966 (3)0.1712 (3)0.5162 (3)0.0526 (8)
H160.16110.24440.50810.073 (2)*
C170.2839 (3)0.1750 (3)0.6016 (3)0.0620 (8)
H170.30860.25010.65130.073 (2)*
C180.3356 (3)0.0639 (3)0.6129 (3)0.0657 (9)
H180.39650.06690.67000.073 (2)*
C190.3007 (3)0.0483 (3)0.5442 (3)0.0567 (8)
H190.33620.12040.55620.073 (2)*
C200.2104 (3)0.0561 (2)0.4543 (2)0.0444 (7)
C210.0490 (3)0.0512 (3)0.1792 (3)0.0484 (7)
H210.07760.02580.17180.073 (2)*
C220.1786 (3)0.1411 (3)0.0189 (3)0.0482 (7)
C230.2544 (3)0.0420 (3)0.0260 (3)0.0579 (8)
H230.24740.02460.09060.073 (2)*
C240.3389 (3)0.0430 (3)0.0618 (3)0.0568 (8)
H240.38670.02500.05720.073 (2)*
C250.3554 (3)0.1417 (3)0.1573 (3)0.0567 (8)
C260.2799 (3)0.2399 (3)0.1640 (3)0.0606 (8)
H260.28770.30690.22820.073 (2)*
C270.1936 (3)0.2392 (3)0.0768 (3)0.0561 (8)
H270.14430.30620.08270.073 (2)*
C280.4529 (3)0.1425 (3)0.2510 (3)0.0725 (10)
H28A0.53070.11450.20760.172 (9)*
H28B0.41910.08680.31200.172 (9)*
H28C0.47080.22680.29270.172 (9)*
O30.0233 (2)0.4606 (2)0.7668 (2)0.0754 (7)
H3A0.01690.53130.76120.110 (11)*
C290.1223 (4)0.4550 (4)0.8508 (4)0.0950 (13)
H29A0.08440.47940.93120.170 (16)*
H29B0.18370.51360.81580.170 (16)*
C300.1883 (5)0.3249 (5)0.8689 (5)0.1227 (17)
H30A0.25970.32330.91770.172 (9)*
H30B0.21880.29830.78850.172 (9)*
H30C0.12940.26880.91240.172 (9)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0815 (17)0.0628 (14)0.0813 (16)0.0284 (12)0.0206 (13)0.0314 (12)
O20.0766 (16)0.0398 (11)0.0687 (14)0.0135 (10)0.0299 (12)0.0018 (10)
N0.0520 (15)0.0505 (14)0.0535 (14)0.0095 (11)0.0157 (12)0.0093 (12)
C10.0484 (17)0.0425 (15)0.0506 (16)0.0025 (13)0.0132 (14)0.0073 (13)
C20.059 (2)0.0532 (17)0.0617 (19)0.0109 (15)0.0057 (16)0.0137 (15)
C30.067 (2)0.076 (2)0.070 (2)0.0011 (18)0.0040 (19)0.0255 (18)
C40.062 (2)0.073 (2)0.082 (2)0.0127 (18)0.0097 (18)0.009 (2)
C50.064 (2)0.0551 (19)0.071 (2)0.0166 (16)0.0079 (18)0.0086 (16)
C60.0522 (18)0.0390 (15)0.0577 (17)0.0076 (13)0.0130 (14)0.0054 (13)
C70.066 (2)0.0492 (17)0.0615 (19)0.0230 (15)0.0092 (17)0.0112 (14)
C80.078 (2)0.0469 (17)0.0623 (19)0.0144 (16)0.0024 (17)0.0166 (15)
C90.0591 (19)0.0429 (15)0.0546 (17)0.0144 (14)0.0032 (15)0.0123 (14)
C100.0442 (17)0.0424 (15)0.0528 (17)0.0098 (12)0.0124 (14)0.0063 (13)
C110.0482 (17)0.0383 (15)0.0526 (16)0.0085 (12)0.0079 (14)0.0135 (13)
C120.0491 (17)0.0358 (15)0.0532 (17)0.0065 (12)0.0074 (14)0.0073 (13)
C130.0442 (16)0.0420 (15)0.0508 (16)0.0078 (12)0.0064 (13)0.0141 (13)
C140.0471 (17)0.0368 (15)0.0542 (17)0.0097 (12)0.0012 (14)0.0150 (13)
C150.0437 (17)0.0387 (15)0.0497 (16)0.0033 (12)0.0015 (13)0.0090 (12)
C160.060 (2)0.0384 (15)0.0595 (18)0.0057 (13)0.0017 (16)0.0076 (13)
C170.070 (2)0.0507 (18)0.062 (2)0.0003 (15)0.0131 (17)0.0014 (15)
C180.070 (2)0.064 (2)0.067 (2)0.0052 (17)0.0264 (17)0.0092 (17)
C190.061 (2)0.0501 (17)0.0634 (19)0.0105 (14)0.0183 (16)0.0095 (15)
C200.0441 (17)0.0435 (15)0.0482 (16)0.0068 (12)0.0064 (13)0.0117 (12)
C210.0450 (17)0.0456 (16)0.0598 (18)0.0108 (13)0.0067 (14)0.0182 (14)
C220.0436 (17)0.0497 (16)0.0535 (17)0.0061 (13)0.0048 (14)0.0132 (14)
C230.058 (2)0.0542 (18)0.0637 (19)0.0142 (15)0.0085 (16)0.0064 (15)
C240.0517 (19)0.0571 (18)0.069 (2)0.0146 (14)0.0073 (16)0.0231 (16)
C250.0490 (19)0.068 (2)0.0565 (18)0.0022 (15)0.0049 (15)0.0234 (16)
C260.060 (2)0.064 (2)0.0589 (19)0.0088 (16)0.0124 (16)0.0061 (16)
C270.056 (2)0.0501 (17)0.0644 (19)0.0127 (14)0.0061 (16)0.0082 (15)
C280.055 (2)0.097 (3)0.075 (2)0.0125 (18)0.0226 (18)0.025 (2)
O30.0790 (18)0.0612 (15)0.0881 (17)0.0015 (12)0.0025 (14)0.0261 (13)
C290.095 (3)0.099 (3)0.097 (3)0.006 (3)0.022 (3)0.025 (2)
C300.108 (4)0.110 (4)0.139 (4)0.014 (3)0.016 (3)0.005 (3)
Geometric parameters (Å, º) top
O1—C91.352 (3)C15—C201.427 (3)
O1—H10.8200C16—C171.364 (4)
O2—C121.358 (3)C16—H160.9300
O2—H20.80 (4)C17—C181.397 (4)
N—C211.280 (3)C17—H170.9300
N—C221.420 (4)C18—C191.357 (4)
C1—C21.407 (4)C18—H180.9300
C1—C101.408 (4)C19—C201.417 (4)
C1—C61.439 (4)C19—H190.9300
C2—C31.363 (4)C21—H210.9300
C2—H2A0.9300C22—C271.377 (4)
C3—C41.394 (5)C22—C231.397 (4)
C3—H30.9300C23—C241.366 (4)
C4—C51.354 (4)C23—H230.9300
C4—H40.9300C24—C251.382 (4)
C5—C61.407 (4)C24—H240.9300
C5—H50.9300C25—C261.387 (4)
C6—C71.405 (4)C25—C281.515 (4)
C7—C81.346 (4)C26—C271.375 (4)
C7—H70.9300C26—H260.9300
C8—C91.429 (4)C27—H270.9300
C8—H80.9300C28—H28A0.9600
C9—C101.379 (4)C28—H28B0.9600
C10—C111.512 (3)C28—H28C0.9600
C11—C121.368 (4)O3—C291.444 (4)
C11—C201.425 (4)O3—H3A0.8200
C12—C131.441 (3)C29—C301.480 (6)
C13—C141.375 (4)C29—H29A0.9700
C13—C211.439 (4)C29—H29B0.9700
C14—C151.400 (4)C30—H30A0.9600
C14—H140.9300C30—H30B0.9600
C15—C161.417 (4)C30—H30C0.9600
C9—O1—H1109.5C16—C17—H17120.7
C12—O2—H2111 (3)C18—C17—H17120.7
C21—N—C22120.8 (2)C19—C18—C17122.7 (3)
C2—C1—C10122.8 (3)C19—C18—H18118.6
C2—C1—C6117.5 (3)C17—C18—H18118.6
C10—C1—C6119.7 (2)C18—C19—C20120.3 (3)
C3—C2—C1121.1 (3)C18—C19—H19119.9
C3—C2—H2A119.4C20—C19—H19119.9
C1—C2—H2A119.4C19—C20—C11122.8 (2)
C2—C3—C4121.0 (3)C19—C20—C15117.6 (3)
C2—C3—H3119.5C11—C20—C15119.6 (2)
C4—C3—H3119.5N—C21—C13123.0 (3)
C5—C4—C3120.2 (3)N—C21—H21118.5
C5—C4—H4119.9C13—C21—H21118.5
C3—C4—H4119.9C27—C22—C23118.2 (3)
C4—C5—C6120.9 (3)C27—C22—N117.6 (3)
C4—C5—H5119.5C23—C22—N124.2 (3)
C6—C5—H5119.5C24—C23—C22120.1 (3)
C7—C6—C5122.8 (3)C24—C23—H23120.0
C7—C6—C1117.9 (3)C22—C23—H23120.0
C5—C6—C1119.3 (3)C23—C24—C25122.0 (3)
C8—C7—C6122.0 (3)C23—C24—H24119.0
C8—C7—H7119.0C25—C24—H24119.0
C6—C7—H7119.0C24—C25—C26117.7 (3)
C7—C8—C9120.4 (3)C24—C25—C28121.0 (3)
C7—C8—H8119.8C26—C25—C28121.3 (3)
C9—C8—H8119.8C27—C26—C25120.7 (3)
O1—C9—C10119.6 (2)C27—C26—H26119.7
O1—C9—C8120.7 (3)C25—C26—H26119.7
C10—C9—C8119.8 (3)C26—C27—C22121.3 (3)
C9—C10—C1120.1 (2)C26—C27—H27119.3
C9—C10—C11120.1 (3)C22—C27—H27119.3
C1—C10—C11119.7 (2)C25—C28—H28A109.5
C12—C11—C20119.4 (2)C25—C28—H28B109.5
C12—C11—C10120.8 (2)H28A—C28—H28B109.5
C20—C11—C10119.8 (2)C25—C28—H28C109.5
O2—C12—C11119.9 (2)H28A—C28—H28C109.5
O2—C12—C13118.7 (2)H28B—C28—H28C109.5
C11—C12—C13121.3 (2)C29—O3—H3A109.5
C14—C13—C21118.8 (2)O3—C29—C30109.6 (4)
C14—C13—C12119.0 (2)O3—C29—H29A109.7
C21—C13—C12122.2 (3)C30—C29—H29A109.7
C13—C14—C15121.3 (2)O3—C29—H29B109.7
C13—C14—H14119.3C30—C29—H29B109.7
C15—C14—H14119.3H29A—C29—H29B108.2
C14—C15—C16120.9 (2)C29—C30—H30A109.5
C14—C15—C20119.4 (2)C29—C30—H30B109.5
C16—C15—C20119.7 (3)H30A—C30—H30B109.5
C17—C16—C15121.0 (3)C29—C30—H30C109.5
C17—C16—H16119.5H30A—C30—H30C109.5
C15—C16—H16119.5H30B—C30—H30C109.5
C16—C17—C18118.7 (3)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H1···O30.821.952.753 (3)164
O2—H2···N0.80 (4)1.90 (4)2.612 (3)148 (4)
O3—H3A···O2i0.822.082.844 (3)155
Symmetry code: (i) x, y+1, z+1.

Experimental details

Crystal data
Chemical formulaC28H21NO2·C2H6O
Mr449.53
Crystal system, space groupTriclinic, P1
Temperature (K)292
a, b, c (Å)10.540 (5), 10.740 (3), 10.779 (3)
α, β, γ (°)82.17 (2), 83.82 (3), 82.89 (3)
V3)1194.4 (8)
Z2
Radiation typeMo Kα
µ (mm1)0.08
Crystal size (mm)0.26 × 0.25 × 0.13
Data collection
DiffractometerEnraf–Nonius CAD-4
Absorption correction
No. of measured, independent and
observed [I > 2σ(I)] reflections
4426, 4391, 2054
Rint0.010
(sin θ/λ)max1)0.606
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.059, 0.188, 0.94
No. of reflections4391
No. of parameters319
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.21, 0.24

Computer programs: DIFRAC (Gabe & White, 1993), DIFRAC, NRCVAX (Gabe et al., 1989), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Version 1.2; Bruno et al., 2002), SHELXL97.

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H1···O30.821.952.753 (3)164.4
O2—H2···N0.80 (4)1.90 (4)2.612 (3)148 (4)
O3—H3A···O2i0.822.082.844 (3)155.4
Symmetry code: (i) x, y+1, z+1.
 

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