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Supporting information
![]() | Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536810037438/pk2260sup1.cif |
![]() | Structure factor file (CIF format) https://doi.org/10.1107/S1600536810037438/pk2260Isup2.hkl |
CCDC reference: 797812
Key indicators
- Single-crystal X-ray study
- T = 296 K
- Mean
(C-C) = 0.002 Å
- R factor = 0.041
- wR factor = 0.123
- Data-to-parameter ratio = 11.3
checkCIF/PLATON results
No syntax errors found
Alert level C PLAT230_ALERT_2_C Hirshfeld Test Diff for O1 -- C13 .. 6.50 su PLAT230_ALERT_2_C Hirshfeld Test Diff for O2 -- C13 .. 6.51 su PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for C13 PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor .... 2.34 PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd. # 2 H2 O
Alert level G PLAT860_ALERT_3_G Note: Number of Least-Squares Restraints ....... 3 PLAT154_ALERT_1_G The su's on the Cell Angles are Equal (x 10000) 100 Deg.
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 5 ALERT level C = Check and explain 2 ALERT level G = General alerts; check 1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 4 ALERT type 2 Indicator that the structure model may be wrong or deficient 1 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
A mixture of C16H10O8 (0.3360 g), BaCl2 (0.3451 g) and water (12 ml) was stirred at room temperature for 6 h. The solution was filtered and the filtrate was left to stand undisturbed. Upon slow evaporation at room temperature, a colorless crystalline solid appeared about a month later. The resulting colorless blocks were filtered off washed with water and dried at ambient temperature.
The H atoms of water molecules were located in difference Fourier maps and refined. All other hydrogen atoms were included in calculated positions and refined using a riding model with isotropic thermal parameters derived from the parent atoms (C—H = 0.93Å, O—H = 0.82 Å, Uiso (H) = 1.2Ueq (C) or 1.5Ueq (O)).
Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
C16H10O8·H2O | Z = 2 |
Mr = 348.26 | F(000) = 360 |
Triclinic, P1 | Dx = 1.532 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.1765 (1) Å | Cell parameters from 9316 reflections |
b = 9.4677 (2) Å | θ = 2.8–27.5° |
c = 11.9301 (2) Å | µ = 0.13 mm−1 |
α = 106.013 (1)° | T = 296 K |
β = 100.098 (1)° | Block, yellow |
γ = 96.753 (1)° | 0.22 × 0.20 × 0.19 mm |
V = 755.18 (2) Å3 |
Bruker APEXII CCD area-detector diffractometer | 2663 independent reflections |
Radiation source: fine-focus sealed tube | 2441 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.019 |
ϕ and ω scans | θmax = 25.0°, θmin = 1.8° |
Absorption correction: multi-scan (SADABS; Bruker, 2007) | h = −8→8 |
Tmin = 0.972, Tmax = 0.976 | k = −11→11 |
13177 measured reflections | l = −14→14 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.123 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0701P)2 + 0.3599P] where P = (Fo2 + 2Fc2)/3 |
2663 reflections | (Δ/σ)max < 0.001 |
236 parameters | Δρmax = 0.22 e Å−3 |
3 restraints | Δρmin = −0.41 e Å−3 |
C16H10O8·H2O | γ = 96.753 (1)° |
Mr = 348.26 | V = 755.18 (2) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.1765 (1) Å | Mo Kα radiation |
b = 9.4677 (2) Å | µ = 0.13 mm−1 |
c = 11.9301 (2) Å | T = 296 K |
α = 106.013 (1)° | 0.22 × 0.20 × 0.19 mm |
β = 100.098 (1)° |
Bruker APEXII CCD area-detector diffractometer | 2663 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2007) | 2441 reflections with I > 2σ(I) |
Tmin = 0.972, Tmax = 0.976 | Rint = 0.019 |
13177 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 3 restraints |
wR(F2) = 0.123 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.22 e Å−3 |
2663 reflections | Δρmin = −0.41 e Å−3 |
236 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
O1 | 0.7651 (3) | 1.4462 (2) | 0.51405 (19) | 0.0815 (6) | |
H1A | 0.8362 | 1.4851 | 0.4799 | 0.122* | |
O2 | 1.0447 (2) | 1.4309 (2) | 0.61981 (17) | 0.0734 (5) | |
O3 | 0.19262 (18) | 1.12724 (18) | 0.49778 (13) | 0.0522 (4) | |
H3A | 0.0770 | 1.0941 | 0.4759 | 0.078* | |
O4 | 0.17196 (18) | 0.97698 (17) | 0.60878 (13) | 0.0518 (4) | |
O5 | 0.3535 (2) | 1.20930 (14) | 0.88045 (14) | 0.0531 (4) | |
O6 | 0.1817 (2) | 1.07466 (14) | 0.96298 (13) | 0.0448 (3) | |
H6A | 0.1502 | 1.1551 | 0.9916 | 0.067* | |
O7 | 0.4508 (2) | 0.46084 (14) | 0.83504 (15) | 0.0531 (4) | |
H7A | 0.4132 | 0.3873 | 0.8539 | 0.080* | |
O8 | 0.2313 (2) | 0.55361 (14) | 0.92899 (13) | 0.0474 (4) | |
O9 | 0.1086 (2) | 1.34013 (16) | 1.05603 (16) | 0.0556 (4) | |
C1 | 0.7674 (2) | 1.1428 (2) | 0.77090 (16) | 0.0376 (4) | |
H1 | 0.8355 | 1.1113 | 0.8306 | 0.045* | |
C2 | 0.8611 (3) | 1.2492 (2) | 0.73154 (17) | 0.0398 (4) | |
H2 | 0.9908 | 1.2877 | 0.7640 | 0.048* | |
C3 | 0.7614 (2) | 1.29848 (19) | 0.64325 (15) | 0.0341 (4) | |
C4 | 0.5674 (2) | 1.24238 (18) | 0.59864 (14) | 0.0308 (4) | |
H4 | 0.4990 | 1.2783 | 0.5419 | 0.037* | |
C5 | 0.4723 (2) | 1.13359 (17) | 0.63672 (13) | 0.0273 (3) | |
C6 | 0.5744 (2) | 1.08125 (17) | 0.72423 (14) | 0.0283 (4) | |
C7 | 0.4997 (2) | 0.95149 (17) | 0.76245 (14) | 0.0278 (3) | |
C8 | 0.3751 (2) | 0.95295 (17) | 0.84121 (14) | 0.0275 (3) | |
C9 | 0.3250 (2) | 0.82523 (17) | 0.87296 (14) | 0.0288 (4) | |
H9 | 0.2409 | 0.8259 | 0.9241 | 0.035* | |
C10 | 0.3984 (2) | 0.69691 (17) | 0.82967 (14) | 0.0298 (4) | |
C11 | 0.5231 (3) | 0.69593 (18) | 0.75326 (15) | 0.0346 (4) | |
H11 | 0.5729 | 0.6103 | 0.7236 | 0.041* | |
C12 | 0.5734 (2) | 0.82211 (19) | 0.72119 (15) | 0.0337 (4) | |
H12 | 0.6588 | 0.8206 | 0.6707 | 0.040* | |
C13 | 0.8643 (3) | 1.4007 (2) | 0.59059 (18) | 0.0441 (5) | |
C14 | 0.2659 (2) | 1.07440 (18) | 0.57925 (14) | 0.0289 (4) | |
C15 | 0.3025 (2) | 1.09080 (18) | 0.89507 (15) | 0.0305 (4) | |
C16 | 0.3493 (2) | 0.56452 (18) | 0.86928 (15) | 0.0326 (4) | |
H9B | 0.0046 (19) | 1.370 (2) | 1.0685 (19) | 0.049* | |
H9A | 0.177 (2) | 1.4042 (19) | 1.037 (2) | 0.049* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0562 (10) | 0.1074 (15) | 0.0975 (14) | −0.0142 (10) | 0.0034 (9) | 0.0776 (12) |
O2 | 0.0451 (9) | 0.0946 (13) | 0.0903 (13) | −0.0128 (8) | 0.0080 (8) | 0.0581 (11) |
O3 | 0.0305 (7) | 0.0725 (10) | 0.0609 (9) | −0.0063 (6) | −0.0048 (6) | 0.0472 (8) |
O4 | 0.0309 (7) | 0.0645 (9) | 0.0665 (9) | −0.0116 (6) | −0.0020 (6) | 0.0463 (8) |
O5 | 0.0791 (10) | 0.0269 (7) | 0.0717 (10) | 0.0150 (6) | 0.0410 (8) | 0.0268 (6) |
O6 | 0.0483 (8) | 0.0325 (7) | 0.0667 (9) | 0.0130 (6) | 0.0330 (7) | 0.0210 (6) |
O7 | 0.0648 (9) | 0.0334 (7) | 0.0836 (10) | 0.0199 (7) | 0.0408 (8) | 0.0341 (7) |
O8 | 0.0514 (8) | 0.0381 (7) | 0.0709 (9) | 0.0136 (6) | 0.0310 (7) | 0.0326 (7) |
O9 | 0.0501 (9) | 0.0410 (8) | 0.0905 (11) | 0.0181 (6) | 0.0342 (8) | 0.0280 (8) |
C1 | 0.0303 (9) | 0.0426 (10) | 0.0421 (9) | −0.0012 (7) | 0.0001 (7) | 0.0243 (8) |
C2 | 0.0291 (9) | 0.0432 (10) | 0.0462 (10) | −0.0070 (7) | 0.0026 (7) | 0.0210 (8) |
C3 | 0.0327 (9) | 0.0336 (9) | 0.0372 (9) | −0.0034 (7) | 0.0087 (7) | 0.0158 (7) |
C4 | 0.0323 (9) | 0.0319 (8) | 0.0319 (8) | 0.0013 (7) | 0.0071 (7) | 0.0172 (7) |
C5 | 0.0268 (8) | 0.0283 (8) | 0.0293 (8) | 0.0022 (6) | 0.0083 (6) | 0.0125 (6) |
C6 | 0.0290 (8) | 0.0278 (8) | 0.0306 (8) | 0.0020 (6) | 0.0081 (6) | 0.0130 (6) |
C7 | 0.0270 (8) | 0.0286 (8) | 0.0292 (8) | 0.0011 (6) | 0.0027 (6) | 0.0147 (6) |
C8 | 0.0264 (8) | 0.0256 (8) | 0.0328 (8) | 0.0024 (6) | 0.0051 (6) | 0.0144 (6) |
C9 | 0.0288 (8) | 0.0274 (8) | 0.0350 (8) | 0.0029 (6) | 0.0103 (6) | 0.0156 (6) |
C10 | 0.0315 (8) | 0.0252 (8) | 0.0349 (8) | 0.0028 (6) | 0.0063 (7) | 0.0142 (6) |
C11 | 0.0409 (9) | 0.0277 (8) | 0.0401 (9) | 0.0095 (7) | 0.0136 (7) | 0.0138 (7) |
C12 | 0.0378 (9) | 0.0340 (9) | 0.0356 (9) | 0.0068 (7) | 0.0148 (7) | 0.0164 (7) |
C13 | 0.0344 (10) | 0.0508 (11) | 0.0503 (11) | −0.0077 (8) | 0.0054 (8) | 0.0289 (9) |
C14 | 0.0274 (8) | 0.0321 (8) | 0.0310 (8) | 0.0028 (6) | 0.0075 (6) | 0.0159 (6) |
C15 | 0.0309 (8) | 0.0277 (8) | 0.0371 (8) | 0.0049 (6) | 0.0078 (7) | 0.0165 (7) |
C16 | 0.0337 (9) | 0.0264 (8) | 0.0422 (9) | 0.0048 (6) | 0.0097 (7) | 0.0170 (7) |
O1—C13 | 1.260 (2) | C3—C4 | 1.384 (2) |
O1—H1A | 0.8200 | C3—C13 | 1.486 (2) |
O2—C13 | 1.256 (2) | C4—C5 | 1.391 (2) |
O3—C14 | 1.274 (2) | C4—H4 | 0.9300 |
O3—H3A | 0.8200 | C5—C6 | 1.405 (2) |
O4—C14 | 1.243 (2) | C5—C14 | 1.489 (2) |
O5—C15 | 1.207 (2) | C6—C7 | 1.498 (2) |
O6—C15 | 1.309 (2) | C7—C12 | 1.391 (2) |
O6—H6A | 0.8200 | C7—C8 | 1.405 (2) |
O7—C16 | 1.309 (2) | C8—C9 | 1.390 (2) |
O7—H7A | 0.8200 | C8—C15 | 1.484 (2) |
O8—C16 | 1.211 (2) | C9—C10 | 1.385 (2) |
O9—H9B | 0.852 (9) | C9—H9 | 0.9300 |
O9—H9A | 0.843 (9) | C10—C11 | 1.384 (2) |
C1—C2 | 1.378 (2) | C10—C16 | 1.483 (2) |
C1—C6 | 1.389 (2) | C11—C12 | 1.380 (2) |
C1—H1 | 0.9300 | C11—H11 | 0.9300 |
C2—C3 | 1.387 (3) | C12—H12 | 0.9300 |
C2—H2 | 0.9300 | ||
C13—O1—H1A | 109.5 | C9—C8—C15 | 119.43 (14) |
C14—O3—H3A | 109.5 | C7—C8—C15 | 120.93 (14) |
C15—O6—H6A | 109.5 | C10—C9—C8 | 121.11 (15) |
C16—O7—H7A | 109.5 | C10—C9—H9 | 119.4 |
H9B—O9—H9A | 109.6 (14) | C8—C9—H9 | 119.4 |
C2—C1—C6 | 122.08 (16) | C11—C10—C9 | 119.36 (14) |
C2—C1—H1 | 119.0 | C11—C10—C16 | 120.69 (15) |
C6—C1—H1 | 119.0 | C9—C10—C16 | 119.91 (15) |
C1—C2—C3 | 119.76 (16) | C12—C11—C10 | 119.95 (15) |
C1—C2—H2 | 120.1 | C12—C11—H11 | 120.0 |
C3—C2—H2 | 120.1 | C10—C11—H11 | 120.0 |
C4—C3—C2 | 119.01 (15) | C11—C12—C7 | 121.64 (15) |
C4—C3—C13 | 120.32 (16) | C11—C12—H12 | 119.2 |
C2—C3—C13 | 120.49 (16) | C7—C12—H12 | 119.2 |
C3—C4—C5 | 121.54 (15) | O2—C13—O1 | 123.66 (18) |
C3—C4—H4 | 119.2 | O2—C13—C3 | 118.64 (17) |
C5—C4—H4 | 119.2 | O1—C13—C3 | 117.59 (16) |
C4—C5—C6 | 119.40 (14) | O4—C14—O3 | 122.26 (15) |
C4—C5—C14 | 117.74 (14) | O4—C14—C5 | 121.23 (14) |
C6—C5—C14 | 122.84 (14) | O3—C14—C5 | 116.51 (14) |
C1—C6—C5 | 118.14 (14) | O5—C15—O6 | 122.33 (16) |
C1—C6—C7 | 115.96 (14) | O5—C15—C8 | 123.22 (15) |
C5—C6—C7 | 125.51 (14) | O6—C15—C8 | 114.42 (14) |
C12—C7—C8 | 118.34 (14) | O8—C16—O7 | 123.12 (15) |
C12—C7—C6 | 115.43 (14) | O8—C16—C10 | 124.19 (15) |
C8—C7—C6 | 126.07 (14) | O7—C16—C10 | 112.68 (14) |
C9—C8—C7 | 119.59 (15) | ||
C6—C1—C2—C3 | 0.5 (3) | C8—C9—C10—C11 | −0.2 (2) |
C1—C2—C3—C4 | 1.7 (3) | C8—C9—C10—C16 | 177.30 (15) |
C1—C2—C3—C13 | −173.46 (18) | C9—C10—C11—C12 | 0.2 (3) |
C2—C3—C4—C5 | −2.7 (3) | C16—C10—C11—C12 | −177.33 (16) |
C13—C3—C4—C5 | 172.56 (16) | C10—C11—C12—C7 | −0.9 (3) |
C3—C4—C5—C6 | 1.3 (2) | C8—C7—C12—C11 | 1.7 (2) |
C3—C4—C5—C14 | −176.96 (15) | C6—C7—C12—C11 | 177.43 (15) |
C2—C1—C6—C5 | −1.9 (3) | C4—C3—C13—O2 | −168.9 (2) |
C2—C1—C6—C7 | 171.29 (17) | C2—C3—C13—O2 | 6.2 (3) |
C4—C5—C6—C1 | 1.0 (2) | C4—C3—C13—O1 | 7.5 (3) |
C14—C5—C6—C1 | 179.14 (15) | C2—C3—C13—O1 | −177.4 (2) |
C4—C5—C6—C7 | −171.49 (15) | C4—C5—C14—O4 | 179.96 (16) |
C14—C5—C6—C7 | 6.6 (2) | C6—C5—C14—O4 | 1.8 (3) |
C1—C6—C7—C12 | −67.3 (2) | C4—C5—C14—O3 | 0.9 (2) |
C5—C6—C7—C12 | 105.40 (19) | C6—C5—C14—O3 | −177.24 (16) |
C1—C6—C7—C8 | 108.06 (19) | C9—C8—C15—O5 | 173.05 (17) |
C5—C6—C7—C8 | −79.3 (2) | C7—C8—C15—O5 | −4.3 (3) |
C12—C7—C8—C9 | −1.7 (2) | C9—C8—C15—O6 | −5.2 (2) |
C6—C7—C8—C9 | −176.93 (15) | C7—C8—C15—O6 | 177.43 (15) |
C12—C7—C8—C15 | 175.65 (15) | C11—C10—C16—O8 | −174.54 (17) |
C6—C7—C8—C15 | 0.5 (2) | C9—C10—C16—O8 | 8.0 (3) |
C7—C8—C9—C10 | 1.0 (2) | C11—C10—C16—O7 | 6.9 (2) |
C15—C8—C9—C10 | −176.42 (14) | C9—C10—C16—O7 | −170.53 (16) |
D—H···A | D—H | H···A | D···A | D—H···A |
O6—H6A···O9 | 0.82 | 1.79 | 2.6076 (18) | 174 |
C4—H4···O3 | 0.93 | 2.37 | 2.706 (2) | 101 |
C9—H9···O6 | 0.93 | 2.38 | 2.711 (2) | 101 |
O1—H1A···O2i | 0.82 | 1.87 | 2.680 (2) | 169 |
O3—H3A···O4ii | 0.82 | 1.84 | 2.6400 (17) | 166 |
O7—H7A···O5iii | 0.82 | 1.82 | 2.6280 (17) | 171 |
O9—H9B···O8iv | 0.85 (1) | 1.92 (1) | 2.7616 (19) | 170 (2) |
O9—H9A···O8v | 0.84 (1) | 2.20 (1) | 2.983 (2) | 154 (2) |
C12—H12···O3vi | 0.93 | 2.57 | 3.451 (2) | 159 |
Symmetry codes: (i) −x+2, −y+3, −z+1; (ii) −x, −y+2, −z+1; (iii) x, y−1, z; (iv) −x, −y+2, −z+2; (v) x, y+1, z; (vi) −x+1, −y+2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C16H10O8·H2O |
Mr | 348.26 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 296 |
a, b, c (Å) | 7.1765 (1), 9.4677 (2), 11.9301 (2) |
α, β, γ (°) | 106.013 (1), 100.098 (1), 96.753 (1) |
V (Å3) | 755.18 (2) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.13 |
Crystal size (mm) | 0.22 × 0.20 × 0.19 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2007) |
Tmin, Tmax | 0.972, 0.976 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13177, 2663, 2441 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.123, 1.03 |
No. of reflections | 2663 |
No. of parameters | 236 |
No. of restraints | 3 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.22, −0.41 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O6—H6A···O9 | 0.82 | 1.79 | 2.6076 (18) | 173.6 |
C4—H4···O3 | 0.93 | 2.37 | 2.706 (2) | 101.3 |
C9—H9···O6 | 0.93 | 2.38 | 2.711 (2) | 101.0 |
O1—H1A···O2i | 0.82 | 1.87 | 2.680 (2) | 169.1 |
O3—H3A···O4ii | 0.82 | 1.84 | 2.6400 (17) | 165.8 |
O7—H7A···O5iii | 0.82 | 1.82 | 2.6280 (17) | 170.8 |
O9—H9B···O8iv | 0.852 (9) | 1.918 (11) | 2.7616 (19) | 170 (2) |
O9—H9A···O8v | 0.843 (9) | 2.202 (13) | 2.983 (2) | 154 (2) |
C12—H12···O3vi | 0.93 | 2.57 | 3.451 (2) | 158.7 |
Symmetry codes: (i) −x+2, −y+3, −z+1; (ii) −x, −y+2, −z+1; (iii) x, y−1, z; (iv) −x, −y+2, −z+2; (v) x, y+1, z; (vi) −x+1, −y+2, −z+1. |
Aromatic carboxylates have been proven to be effective building blocks in constructing various architectures (Li et al., 2008; Du et al., 2007). Many crystal structures of aromatic carboxylic hydrates have been reported (Jiang et al., 2008; Li et al., 2009). In this paper, we report the synthesis and structure of a new aromatic carboxylic hydrate, biphenyl-2, 2', 4, 4' -tetracarboxylic acid monohydrate, (Fig. 1).
The dihedral angle between the two benzene rings of biphenyl-2, 2', 4, 4' -tetracarboxylic acid monohydrate is 71.63 (5)°, which is markedly different from 42.30 (11)° found in the biphenyl-2, 3, 3', 4'-tetracarboxylic acid monohydrate (Jiang et al., 2008). This might be a result of the hydrogen bonding ineractions of the title compound. The lattice water molecule links with biphenyl-2, 2', 4, 4'-tetracarboxylic acid via O—H···O hydrogen bonding. The extensive O—H···O hydrogen bonding and a weak intermolecular C—H···O hydrogen bond helps to stabilize the crystal structure (Fig. 2 and Table 1). In addition, pairs of inversion related molecules are stacked with mean interplanar spacing = 3.5195 (18)Å)