supplementary materials
Poly[[triaqua[
4-N-(4-carboxylatophenyl)iminodiacetato]sodium(I)zinc(II)] dihydrate]
In the title coordination polymer, {[NaZn(C11H8NO6)(H2O)3]·2H2O}n, the Zn atom is coordinated in a distorted tetrahedral environment by three carboxylate O atoms from two (4-carboxylatophenylimino)diacetate ligands and one water molecule; the Na atom is in an distorted octahedral coordination environment formed by four carboxylate O atoms from three (4-carboxylatophenylimino)diacetate ligands and two water molecules. The Zn atoms and Na atoms are linked by (4-carboxylatophenylimino)diacetate ligands into a three-dimensional framework; the uncoordinated water molecules fill the voids of the skeleton and stabilize it by O-H
O hydrogen bonds.
2,2'-(4-Carboxyphenylazanediyl)diacetic acid was synthesized by the literature
method (Young et al., 1958). The complex (I) was synthesized
with
znic(II) dinitrate (0.375 g, 2 mmol) and
2,2'-(4-Carboxyphenylazanediyl)diacetic acid (0.253 g, 1 mmol) were dissolved
in methanol and the pH was adjusted to about 7 with 0.01M sodium
hydroxide. Colorless crystals were separated from the filtered solution after
several days.
H atoms bound to C atoms were placed in calculated positions and treated as
riding on their parent atoms, with C—H = 0.93 Å, 0.97 Å for aromatic and
methylene H atoms respectively; Uiso(H) was set to = 1.2Ueq
of the carrier atom. Water H atoms were placed in calculated positions, with
O—H=0.85 Å, Uiso(H) = 1.Ueq(O).
Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO (Rigaku, 1998); data reduction: CrystalStructure (Rigaku/MSC, 2002); 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: SHELXL97 (Sheldrick, 2008).
Poly[[triaqua[µ
4-N-(4-carboxylatophenyl)iminodiacetato]sodium(I)zinc(II)]
dihydrate]
top
Crystal data top
| [NaZn(C11H8NO6)(H2O)3]·2H2O | Z = 2 |
| Mr = 428.62 | F(000) = 440 |
| Triclinic, P1 | Dx = 1.762 Mg m−3 |
| Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
| a = 7.925 (4) Å | Cell parameters from 7215 reflections |
| b = 8.989 (6) Å | θ = 3.1–27.5° |
| c = 11.726 (6) Å | µ = 1.61 mm−1 |
| α = 96.28 (3)° | T = 291 K |
| β = 98.63 (2)° | Block, colorless |
| γ = 98.97 (2)° | 0.22 × 0.18 × 0.16 mm |
| V = 808.1 (8) Å3 | |
Data collection top
Rigaku R-AXIS RAPID diffractometer | 3668 independent reflections |
| Radiation source: fine-focus sealed tube | 3320 reflections with I > 2σ(I) |
| graphite | Rint = 0.021 |
| ω scans | θmax = 27.5°, θmin = 3.1° |
Absorption correction: multi-scan (ABSCOR; Higashi, 1995) | h = −10→9 |
| Tmin = 0.718, Tmax = 0.782 | k = −11→11 |
| 8055 measured reflections | l = −14→15 |
Refinement top
| 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)] = 0.026 | Hydrogen site location: inferred from neighbouring sites |
| wR(F2) = 0.065 | H-atom parameters constrained |
| S = 1.11 | w = 1/[σ2(Fo2) + (0.0288P)2 + 0.3237P] where P = (Fo2 + 2Fc2)/3 |
| 3668 reflections | (Δ/σ)max = 0.001 |
| 226 parameters | Δρmax = 0.28 e Å−3 |
| 0 restraints | Δρmin = −0.44 e Å−3 |
Crystal data top
| [NaZn(C11H8NO6)(H2O)3]·2H2O | γ = 98.97 (2)° |
| Mr = 428.62 | V = 808.1 (8) Å3 |
| Triclinic, P1 | Z = 2 |
| a = 7.925 (4) Å | Mo Kα radiation |
| b = 8.989 (6) Å | µ = 1.61 mm−1 |
| c = 11.726 (6) Å | T = 291 K |
| α = 96.28 (3)° | 0.22 × 0.18 × 0.16 mm |
| β = 98.63 (2)° | |
Data collection top
Rigaku R-AXIS RAPID diffractometer | 3668 independent reflections |
Absorption correction: multi-scan (ABSCOR; Higashi, 1995) | 3320 reflections with I > 2σ(I) |
| Tmin = 0.718, Tmax = 0.782 | Rint = 0.021 |
| 8055 measured reflections | θmax = 27.5° |
Refinement top
| R[F2 > 2σ(F2)] = 0.026 | H-atom parameters constrained |
| wR(F2) = 0.065 | Δρmax = 0.28 e Å−3 |
| S = 1.11 | Δρmin = −0.44 e Å−3 |
| 3668 reflections | Absolute structure: ? |
| 226 parameters | Flack parameter: ? |
| 0 restraints | Rogers parameter: ? |
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| | x | y | z | Uiso*/Ueq | |
| C1 | 0.5758 (2) | 0.2908 (2) | 0.70951 (15) | 0.0234 (4) | |
| C2 | 0.4639 (2) | 0.1504 (2) | 0.73561 (15) | 0.0228 (4) | |
| H1 | 0.4196 | 0.1764 | 0.8066 | 0.027* | |
| H2 | 0.3653 | 0.1200 | 0.6730 | 0.027* | |
| C3 | 0.5765 (2) | −0.1842 (2) | 0.59130 (15) | 0.0225 (4) | |
| C4 | 0.4695 (2) | −0.1219 (2) | 0.67581 (15) | 0.0249 (4) | |
| H8 | 0.3614 | −0.1063 | 0.6318 | 0.030* | |
| H7 | 0.4413 | −0.1979 | 0.7259 | 0.030* | |
| C5 | 0.6392 (2) | 0.00980 (19) | 0.86167 (14) | 0.0189 (3) | |
| C6 | 0.6706 (2) | 0.13196 (19) | 0.95095 (15) | 0.0223 (3) | |
| H3 | 0.6319 | 0.2219 | 0.9372 | 0.027* | |
| C7 | 0.7589 (2) | 0.1201 (2) | 1.05973 (15) | 0.0232 (4) | |
| H4 | 0.7757 | 0.2014 | 1.1189 | 0.028* | |
| C8 | 0.8230 (2) | −0.0111 (2) | 1.08227 (14) | 0.0210 (3) | |
| C9 | 0.7931 (2) | −0.1318 (2) | 0.99287 (16) | 0.0247 (4) | |
| H5 | 0.8350 | −0.2205 | 1.0063 | 0.030* | |
| C10 | 0.7025 (2) | −0.1227 (2) | 0.88446 (15) | 0.0237 (4) | |
| H6 | 0.6834 | −0.2053 | 0.8261 | 0.028* | |
| C11 | 0.9258 (2) | −0.0177 (2) | 1.19854 (15) | 0.0223 (4) | |
| N1 | 0.5524 (2) | 0.02088 (16) | 0.74928 (12) | 0.0218 (3) | |
| Na1 | 0.70264 (10) | 0.49576 (8) | 0.57052 (7) | 0.02913 (17) | |
| O1 | 0.52052 (19) | 0.41253 (16) | 0.71895 (12) | 0.0337 (3) | |
| O2 | 0.71665 (17) | 0.27959 (15) | 0.67283 (12) | 0.0294 (3) | |
| O3 | 0.70204 (18) | −0.09667 (16) | 0.56440 (12) | 0.0310 (3) | |
| O4 | 0.53062 (19) | −0.31883 (15) | 0.54829 (12) | 0.0340 (3) | |
| O5 | 0.9395 (2) | 0.08672 (16) | 1.28035 (11) | 0.0331 (3) | |
| O6 | 1.00014 (17) | −0.13340 (15) | 1.21007 (11) | 0.0272 (3) | |
| O7 | 0.9495 (2) | 0.17005 (17) | 0.52465 (12) | 0.0381 (3) | |
| H9 | 0.9528 | 0.1236 | 0.4581 | 0.057* | |
| H10 | 1.0276 | 0.2489 | 0.5443 | 0.057* | |
| O8 | 0.9626 (2) | 0.60310 (17) | 0.69752 (13) | 0.0380 (3) | |
| H12 | 0.9924 | 0.6993 | 0.7101 | 0.057* | |
| H11 | 0.9728 | 0.5703 | 0.7630 | 0.057* | |
| O9 | 0.81948 (19) | 0.56713 (17) | 0.40602 (13) | 0.0371 (3) | |
| H13 | 0.8786 | 0.5073 | 0.3756 | 0.056* | |
| H14 | 0.7250 | 0.5671 | 0.3609 | 0.056* | |
| O10 | 0.6141 (3) | 0.4735 (3) | 0.09255 (19) | 0.0770 (7) | |
| H15 | 1.0046 | 0.6401 | 0.1287 | 0.116* | |
| H16 | 0.8541 | 0.5354 | 0.0951 | 0.116* | |
| O11 | 0.9641 (2) | 0.54605 (19) | 0.10841 (14) | 0.0459 (4) | |
| H17 | 0.5653 | 0.5064 | 0.1476 | 0.069* | |
| H18 | 0.5412 | 0.4016 | 0.0505 | 0.069* | |
| Zn1 | 0.81967 (3) | 0.09629 (2) | 0.651229 (17) | 0.02072 (7) | |
Atomic displacement parameters (Å2) top| | U11 | U22 | U33 | U12 | U13 | U23 |
| C1 | 0.0252 (9) | 0.0272 (9) | 0.0201 (8) | 0.0090 (7) | 0.0039 (7) | 0.0070 (7) |
| C2 | 0.0215 (8) | 0.0277 (9) | 0.0206 (8) | 0.0076 (7) | 0.0028 (7) | 0.0054 (7) |
| C3 | 0.0231 (9) | 0.0225 (8) | 0.0186 (8) | 0.0043 (7) | −0.0058 (7) | 0.0019 (6) |
| C4 | 0.0249 (9) | 0.0242 (9) | 0.0217 (8) | −0.0020 (7) | 0.0002 (7) | 0.0000 (7) |
| C5 | 0.0194 (8) | 0.0215 (8) | 0.0163 (7) | 0.0018 (6) | 0.0045 (6) | 0.0046 (6) |
| C6 | 0.0267 (9) | 0.0198 (8) | 0.0210 (8) | 0.0070 (7) | 0.0020 (7) | 0.0037 (6) |
| C7 | 0.0248 (9) | 0.0239 (9) | 0.0198 (8) | 0.0040 (7) | 0.0018 (7) | 0.0005 (7) |
| C8 | 0.0181 (8) | 0.0269 (9) | 0.0189 (8) | 0.0032 (7) | 0.0043 (7) | 0.0070 (7) |
| C9 | 0.0289 (9) | 0.0217 (8) | 0.0260 (9) | 0.0080 (7) | 0.0058 (8) | 0.0077 (7) |
| C10 | 0.0319 (9) | 0.0209 (8) | 0.0193 (8) | 0.0073 (7) | 0.0054 (7) | 0.0013 (6) |
| C11 | 0.0172 (8) | 0.0266 (9) | 0.0226 (8) | −0.0008 (7) | 0.0031 (7) | 0.0085 (7) |
| N1 | 0.0267 (8) | 0.0208 (7) | 0.0165 (6) | 0.0044 (6) | −0.0005 (6) | 0.0019 (5) |
| Na1 | 0.0296 (4) | 0.0250 (4) | 0.0319 (4) | 0.0013 (3) | 0.0037 (3) | 0.0070 (3) |
| O1 | 0.0411 (8) | 0.0296 (7) | 0.0385 (8) | 0.0181 (6) | 0.0157 (7) | 0.0107 (6) |
| O2 | 0.0273 (7) | 0.0265 (7) | 0.0412 (8) | 0.0108 (5) | 0.0144 (6) | 0.0143 (6) |
| O3 | 0.0303 (7) | 0.0297 (7) | 0.0298 (7) | −0.0017 (6) | 0.0099 (6) | −0.0067 (5) |
| O4 | 0.0383 (8) | 0.0212 (7) | 0.0369 (8) | 0.0023 (6) | −0.0018 (6) | −0.0049 (6) |
| O5 | 0.0431 (8) | 0.0325 (7) | 0.0206 (6) | 0.0053 (6) | −0.0041 (6) | 0.0043 (5) |
| O6 | 0.0240 (6) | 0.0305 (7) | 0.0269 (6) | 0.0076 (5) | −0.0019 (5) | 0.0081 (5) |
| O7 | 0.0432 (9) | 0.0404 (8) | 0.0272 (7) | −0.0084 (7) | 0.0159 (6) | −0.0012 (6) |
| O8 | 0.0471 (9) | 0.0291 (7) | 0.0329 (7) | 0.0003 (6) | −0.0020 (7) | 0.0049 (6) |
| O9 | 0.0320 (8) | 0.0427 (9) | 0.0359 (8) | 0.0032 (6) | 0.0076 (6) | 0.0048 (6) |
| O10 | 0.0630 (13) | 0.0963 (18) | 0.0657 (13) | 0.0182 (12) | 0.0178 (11) | −0.0318 (12) |
| O11 | 0.0583 (10) | 0.0381 (9) | 0.0392 (8) | 0.0073 (8) | 0.0024 (8) | 0.0052 (7) |
| Zn1 | 0.02166 (11) | 0.02060 (11) | 0.01927 (10) | 0.00437 (7) | 0.00116 (8) | 0.00223 (7) |
Geometric parameters (Å, °) top
| C1—O1 | 1.240 (2) | Na1—O4i | 2.3239 (19) |
| C1—O2 | 1.269 (2) | Na1—O8 | 2.353 (2) |
| C1—C2 | 1.513 (3) | Na1—O9 | 2.3687 (19) |
| C2—N1 | 1.461 (2) | Na1—O4ii | 2.3901 (19) |
| C2—H1 | 0.9700 | Na1—O2 | 2.4009 (19) |
| C2—H2 | 0.9700 | Na1—O1 | 2.5245 (19) |
| C3—O4 | 1.235 (2) | Na1—Na1iii | 3.401 (2) |
| C3—O3 | 1.270 (2) | Na1—H14 | 2.6320 |
| C3—C4 | 1.514 (3) | O2—Zn1 | 1.9584 (16) |
| C4—N1 | 1.465 (2) | O3—Zn1 | 1.9336 (17) |
| C4—H8 | 0.9700 | O4—Na1iv | 2.3239 (19) |
| C4—H7 | 0.9700 | O4—Na1ii | 2.3901 (19) |
| C5—C6 | 1.396 (2) | O6—Zn1v | 1.9574 (15) |
| C5—C10 | 1.399 (2) | O7—Zn1 | 2.0400 (16) |
| C5—N1 | 1.413 (2) | O7—H9 | 0.8500 |
| C6—C7 | 1.383 (2) | O7—H10 | 0.8500 |
| C6—H3 | 0.9300 | O8—H12 | 0.8500 |
| C7—C8 | 1.391 (3) | O8—H11 | 0.8500 |
| C7—H4 | 0.9300 | O9—H13 | 0.8500 |
| C8—C9 | 1.389 (3) | O9—H14 | 0.8500 |
| C8—C11 | 1.492 (2) | O10—H17 | 0.8498 |
| C9—C10 | 1.380 (3) | O10—H18 | 0.8504 |
| C9—H5 | 0.9300 | O11—H15 | 0.8504 |
| C10—H6 | 0.9300 | O11—H16 | 0.8499 |
| C11—O5 | 1.246 (2) | Zn1—O6v | 1.9574 (15) |
| C11—O6 | 1.283 (2) | | |
| | | |
| O1—C1—O2 | 122.18 (17) | O4i—Na1—O2 | 138.34 (6) |
| O1—C1—C2 | 117.99 (17) | O8—Na1—O2 | 84.49 (6) |
| O2—C1—C2 | 119.71 (16) | O9—Na1—O2 | 132.16 (6) |
| N1—C2—C1 | 114.73 (15) | O4ii—Na1—O2 | 80.48 (7) |
| N1—C2—H1 | 108.6 | O4i—Na1—O1 | 85.66 (6) |
| C1—C2—H1 | 108.6 | O8—Na1—O1 | 98.94 (7) |
| N1—C2—H2 | 108.6 | O9—Na1—O1 | 168.52 (6) |
| C1—C2—H2 | 108.6 | O4ii—Na1—O1 | 78.25 (7) |
| H1—C2—H2 | 107.6 | O2—Na1—O1 | 52.90 (5) |
| O4—C3—O3 | 123.36 (18) | O4i—Na1—Na1iii | 44.60 (5) |
| O4—C3—C4 | 116.88 (17) | O8—Na1—Na1iii | 153.40 (6) |
| O3—C3—C4 | 119.70 (16) | O9—Na1—Na1iii | 89.94 (6) |
| N1—C4—C3 | 115.30 (15) | O4ii—Na1—Na1iii | 43.06 (5) |
| N1—C4—H8 | 108.4 | O2—Na1—Na1iii | 113.22 (5) |
| C3—C4—H8 | 108.4 | O1—Na1—Na1iii | 78.77 (6) |
| N1—C4—H7 | 108.4 | O4i—Na1—H14 | 75.5 |
| C3—C4—H7 | 108.4 | O8—Na1—H14 | 109.2 |
| H8—C4—H7 | 107.5 | O9—Na1—H14 | 18.6 |
| C6—C5—C10 | 118.34 (15) | O4ii—Na1—H14 | 77.8 |
| C6—C5—N1 | 121.25 (15) | O2—Na1—H14 | 138.5 |
| C10—C5—N1 | 120.35 (15) | O1—Na1—H14 | 149.9 |
| C7—C6—C5 | 120.44 (16) | Na1iii—Na1—H14 | 71.4 |
| C7—C6—H3 | 119.8 | C1—O1—Na1 | 87.44 (12) |
| C5—C6—H3 | 119.8 | C1—O2—Zn1 | 127.16 (12) |
| C6—C7—C8 | 121.26 (17) | C1—O2—Na1 | 92.39 (10) |
| C6—C7—H4 | 119.4 | Zn1—O2—Na1 | 134.30 (7) |
| C8—C7—H4 | 119.4 | C3—O3—Zn1 | 126.24 (12) |
| C9—C8—C7 | 118.10 (16) | C3—O4—Na1iv | 124.19 (12) |
| C9—C8—C11 | 121.76 (16) | C3—O4—Na1ii | 143.46 (12) |
| C7—C8—C11 | 120.11 (16) | Na1iv—O4—Na1ii | 92.34 (7) |
| C10—C9—C8 | 121.31 (16) | C11—O6—Zn1v | 111.56 (12) |
| C10—C9—H5 | 119.3 | Zn1—O7—H9 | 128.8 |
| C8—C9—H5 | 119.3 | Zn1—O7—H10 | 117.0 |
| C9—C10—C5 | 120.52 (16) | H9—O7—H10 | 112.8 |
| C9—C10—H6 | 119.7 | Na1—O8—H12 | 119.1 |
| C5—C10—H6 | 119.7 | Na1—O8—H11 | 114.2 |
| O5—C11—O6 | 121.83 (16) | H12—O8—H11 | 107.7 |
| O5—C11—C8 | 120.69 (16) | Na1—O9—H13 | 116.7 |
| O6—C11—C8 | 117.47 (16) | Na1—O9—H14 | 98.5 |
| C5—N1—C2 | 117.69 (14) | H13—O9—H14 | 111.0 |
| C5—N1—C4 | 116.93 (14) | H17—O10—H18 | 106.8 |
| C2—N1—C4 | 115.93 (14) | H15—O11—H16 | 107.9 |
| O4i—Na1—O8 | 108.97 (7) | O3—Zn1—O6v | 128.18 (6) |
| O4i—Na1—O9 | 87.74 (7) | O3—Zn1—O2 | 125.40 (7) |
| O8—Na1—O9 | 92.08 (7) | O6v—Zn1—O2 | 100.31 (7) |
| O4i—Na1—O4ii | 87.66 (7) | O3—Zn1—O7 | 97.01 (7) |
| O8—Na1—O4ii | 162.99 (6) | O6v—Zn1—O7 | 103.35 (7) |
| O9—Na1—O4ii | 92.12 (7) | O2—Zn1—O7 | 93.95 (7) |
| Symmetry codes: (i) x, y+1, z; (ii) −x+1, −y, −z+1; (iii) −x+1, −y+1, −z+1; (iv) x, y−1, z; (v) −x+2, −y, −z+2. |
Hydrogen-bond geometry (Å, °) top
| D—H···A | D—H | H···A | D···A | D—H···A |
| O7—H10···O9vi | 0.85 | 1.87 | 2.716 (3) | 174 |
| O7—H9···O5vii | 0.85 | 2.06 | 2.867 (2) | 159 |
| O8—H12···O5viii | 0.85 | 1.90 | 2.748 (3) | 173 |
| O8—H11···O11vi | 0.85 | 1.97 | 2.798 (2) | 163 |
| O9—H14···O1iii | 0.85 | 2.07 | 2.910 (2) | 168 |
| O9—H13···O8vi | 0.85 | 1.96 | 2.801 (2) | 172 |
| O10—H17···O1iii | 0.85 | 1.92 | 2.762 (3) | 174 |
| O10—H18···O10ix | 0.85 | 2.41 | 2.744 (5) | 104 |
| O11—H15···O6x | 0.85 | 2.16 | 2.949 (3) | 154 |
| O11—H16···O10 | 0.85 | 1.89 | 2.721 (3) | 165 |
| Symmetry codes: (vi) −x+2, −y+1, −z+1; (vii) x, y, z−1; (viii) −x+2, −y+1, −z+2; (iii) −x+1, −y+1, −z+1; (ix) −x+1, −y+1, −z; (x) x, y+1, z−1. |
Table 1
Hydrogen-bond geometry (Å, °) top
| D—H···A | D—H | H···A | D···A | D—H···A |
| O7—H10···O9i | 0.85 | 1.87 | 2.716 (3) | 174 |
| O7—H9···O5ii | 0.85 | 2.06 | 2.867 (2) | 159 |
| O8—H12···O5iii | 0.85 | 1.90 | 2.748 (3) | 173 |
| O8—H11···O11i | 0.85 | 1.97 | 2.798 (2) | 163 |
| O9—H14···O1iv | 0.85 | 2.07 | 2.910 (2) | 168 |
| O9—H13···O8i | 0.85 | 1.96 | 2.801 (2) | 172 |
| O10—H17···O1iv | 0.85 | 1.92 | 2.762 (3) | 174 |
| O10—H18···O10v | 0.85 | 2.41 | 2.744 (5) | 104 |
| O11—H15···O6vi | 0.85 | 2.16 | 2.949 (3) | 154 |
| O11—H16···O10 | 0.85 | 1.89 | 2.721 (3) | 165 |
| Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) x, y, z−1; (iii) −x+2, −y+1, −z+2; (iv) −x+1, −y+1, −z+1; (v) −x+1, −y+1, −z; (vi) x, y+1, z−1. |
The authors thank Heilongjiang University for supporting this study.
Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan.
Rigaku (1998). RAPID-AUTO. Rigaku Corporation, Tokyo, Japan.
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2,2'-(4-Carboxyphenylazanediyl)diacetic acid is a multidentate flexible ligand with versatile binding abilities and capability of participating in hydrongen bonds, thus representing an excellent candidate for the construction of supramolecular complexe. In this paper, we report a novel title compound, (I), which is prepared by 2,2'-(4-carboxyphenylazanediyl)diacetic acid ligand and Zinc dinitrate under neutral aqueous conditions, which forms a three-dimensional framework structure.
The asymmetric unit of (1) consists of one Zn(II) ion, one Na(I) ion, one 4-carboxylatophenylimino)diacetate anion, three coordinated water molecules and two uncoordinated water molecules (Fig. 1). The Zn(II) ion is in a tetrahedral coordination environment, formed by three carboxylate O atoms from two 4-carboxylatophenylimino)diacetate ligands and one water molecules. The Na(I) ion exists in a distorted octahedral configuration with the equatorial plane being defined by the atoms O1, O2, O4II and O8, and with O9 and o4III occupy the axial sites. Each 4-carboxylatophenylimino)diacetate anion bridged two Zn(II) ions and three Na(I) ions to form a three-dimensional supramolecular framework network in which uncoordinated water molecules filled the space of the skelecton and stabilized by O—H···O hydrogen bonds(Fig. 2, Table 1).