Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S160053680703320X/wm2123sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S160053680703320X/wm2123Isup2.hkl |
CCDC reference: 647424
A solution of isonicotinic acid (0.3693 g, 3 mmol) in 30 ml hot water was added under stirring to a solution of Gd(NO3)3.5H2O (0.4333 g, 1 mmol) in 10 ml water and the pH of the mixture was adjusted to about 5.4 using aqueous ammonia. Gd(NO3)3.5H2O was prepared by dissolving Gd2O3 (99.95%) in diluted HNO3, and then crystallizing the products. After stirring for 2 h and cooling to room temperature, the mixture was filtered. Light-yellow single crystals of (I) were obtained from the filtrate after two weeks.
The H atoms attached to C atoms were treated as riding with C—H = 0.93 Å and Uiso(H) = 1.5Ueq(C) of the parent atom. The H atoms of the water molecules were refined with Uiso(H) = 1.2Ueq(O) and distance restraints of 0.82 (1) Å.
The interest in crystal engineering of coordination polymers originates from their potential applications as materials for molecular selection, ion exchange, catalysis, and because of their intriguing variety of architectures and topologies (Yaghi et al., 1998, 2003; Eddaoudi et al., 2001; Moulton & Zaworotko, 2001). In particular, isonicotinate metal complexes are of considerable interest because isonicotinic acid plays an important role in the metabolism of all living cells (Sorenson, 1976), and acts as a versatile ligand to construct supramolecular architectures (Aakeroy et al., 1999; Burrows et al., 1998). Moreover, isonicotinate metal complexes find also use as drugs (Sorenson, 1976). In this article we report on the crystal structure of the title complex (I), a new coordination polymer of isonicotinic acid with GdIII.
A part of the monomeric structure of (I) is shown in Fig. 1 and selected geometric parameters are gathered in Table 1. The GdIII cation is coordinated by eight O atoms in a distorted bicapped trigonal-prismatic environment. The [GdO8] polyhedron is built by two O atoms from two water molecules, by four carboxylate O atoms of bridging isonicotinate anions and by two carboxylate O atoms of chelating isonicotinate anions. Each adjacent GdIII is bridged by two O atoms of two isonicotinate ligands to form an infinite chain along the a axis. The bond lengths of C7—O3, C7—O4 and C13—O5, C13—O6 are 1.251 (4), 1.250 (4) Å and 1.258 (3), 1.242 (4) Å, respectively, indicating that a delocalized π-bond is present.
Adjacent chains are linked into a framework structure by hydrogen bond interactions. Two types of hydrogen bonds are present in (I) (Table 2): One type is formed between O atoms of the coordinating water molecules and the N atoms of the isonicotinate ligands (O7—H7A···N3 and O8—H8B···N2), whereas the other type consists of O atoms of the coordinating water molecules and the carboxylate O atoms of the isonicotinate ligands (O7—H7B···O1, O8—H8A···O2).
Potential applications and different structures and topologies of coordination polymers in general are given by Yaghi et al. (1998, 2003), Eddaoudi et al. (2001) and Moulton & Zaworotko (2001). For isonicotinate ligands in particular, see Aakeroy et al. (1999) and Burrows et al. (1998). The use of isonicotinate metal complexes as drugs is discussed by Sorenson (1976).
Data collection: SMART (Bruker, 1999); cell refinement: SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 2000); software used to prepare material for publication: SHELXTL.
[Gd(C6H4NO2)3(H2O)2] | F(000) = 1092 |
Mr = 559.59 | Dx = 1.925 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3435 reflections |
a = 9.4786 (6) Å | θ = 2.2–25.1° |
b = 18.9589 (11) Å | µ = 3.49 mm−1 |
c = 10.7557 (6) Å | T = 293 K |
β = 92.313 (1)° | Prism, light yellow |
V = 1931.3 (2) Å3 | 0.39 × 0.31 × 0.26 mm |
Z = 4 |
Bruker SMART CCD area-detector diffractometer | 3435 independent reflections |
Radiation source: fine-focus sealed tube | 3102 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.023 |
φ and ω scans | θmax = 25.1°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | h = −11→9 |
Tmin = 0.286, Tmax = 0.404 | k = −22→21 |
9640 measured reflections | l = −12→12 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.020 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.044 | w = 1/[σ2(Fo2) + (0.015P)2 + 1.4397P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.013 |
3435 reflections | Δρmax = 0.61 e Å−3 |
288 parameters | Δρmin = −0.62 e Å−3 |
4 restraints | Extinction correction: SHELXL97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.00020 (8) |
[Gd(C6H4NO2)3(H2O)2] | V = 1931.3 (2) Å3 |
Mr = 559.59 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 9.4786 (6) Å | µ = 3.49 mm−1 |
b = 18.9589 (11) Å | T = 293 K |
c = 10.7557 (6) Å | 0.39 × 0.31 × 0.26 mm |
β = 92.313 (1)° |
Bruker SMART CCD area-detector diffractometer | 3435 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | 3102 reflections with I > 2σ(I) |
Tmin = 0.286, Tmax = 0.404 | Rint = 0.023 |
9640 measured reflections |
R[F2 > 2σ(F2)] = 0.020 | 4 restraints |
wR(F2) = 0.044 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.61 e Å−3 |
3435 reflections | Δρmin = −0.62 e Å−3 |
288 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 | ||
O4 | 0.4038 (2) | 0.44208 (12) | 0.1958 (2) | 0.0356 (5) | |
Gd1 | 0.752460 (15) | 0.509995 (7) | −0.043256 (12) | 0.02074 (6) | |
C1 | 0.7433 (3) | 0.60647 (16) | 0.1627 (3) | 0.0289 (7) | |
C2 | 0.7397 (3) | 0.64748 (17) | 0.2816 (3) | 0.0338 (8) | |
O8 | 0.8820 (3) | 0.47313 (14) | −0.2220 (2) | 0.0363 (5) | |
O3 | 0.6058 (2) | 0.46285 (12) | 0.10665 (18) | 0.0352 (5) | |
O5 | 0.9145 (2) | 0.42758 (11) | 0.0353 (2) | 0.0336 (5) | |
O7 | 0.6381 (2) | 0.40567 (12) | −0.1344 (2) | 0.0332 (5) | |
C3 | 0.6672 (4) | 0.71045 (18) | 0.2911 (3) | 0.0397 (8) | |
H3 | 0.6153 | 0.7285 | 0.2232 | 0.048* | |
N1 | 0.7408 (4) | 0.7220 (2) | 0.5057 (3) | 0.0650 (10) | |
C4 | 0.6733 (4) | 0.7460 (2) | 0.4033 (4) | 0.0505 (10) | |
H4 | 0.6275 | 0.7893 | 0.4076 | 0.061* | |
C7 | 0.5354 (3) | 0.44658 (15) | 0.1983 (3) | 0.0262 (7) | |
N2 | 0.7527 (4) | 0.42460 (18) | 0.5549 (3) | 0.0529 (9) | |
C12 | 0.7578 (4) | 0.43956 (18) | 0.3345 (3) | 0.0384 (8) | |
H12 | 0.8117 | 0.4467 | 0.2652 | 0.046* | |
C8 | 0.6130 (3) | 0.43428 (16) | 0.3216 (3) | 0.0291 (7) | |
C11 | 0.8212 (4) | 0.4342 (2) | 0.4511 (3) | 0.0500 (10) | |
H11 | 0.9191 | 0.4374 | 0.4578 | 0.060* | |
C6 | 0.8133 (4) | 0.6229 (2) | 0.3861 (3) | 0.0544 (11) | |
H6 | 0.8658 | 0.5816 | 0.3833 | 0.065* | |
C5 | 0.8074 (5) | 0.6613 (3) | 0.4954 (4) | 0.0729 (14) | |
H5 | 0.8534 | 0.6430 | 0.5663 | 0.087* | |
O6 | 1.1211 (2) | 0.38840 (11) | 0.1093 (2) | 0.0342 (5) | |
C14 | 0.9197 (3) | 0.31977 (15) | 0.1482 (3) | 0.0248 (7) | |
C13 | 0.9910 (3) | 0.38314 (15) | 0.0928 (3) | 0.0253 (7) | |
C9 | 0.5393 (4) | 0.4215 (2) | 0.4275 (3) | 0.0508 (10) | |
H9 | 0.4419 | 0.4153 | 0.4225 | 0.061* | |
C10 | 0.6130 (5) | 0.4179 (2) | 0.5414 (3) | 0.0611 (12) | |
H10 | 0.5620 | 0.4105 | 0.6123 | 0.073* | |
O1 | 0.6452 (2) | 0.61156 (11) | 0.08095 (19) | 0.0298 (5) | |
O2 | 0.8464 (2) | 0.56526 (11) | 0.14872 (19) | 0.0325 (5) | |
N3 | 0.7840 (3) | 0.20752 (15) | 0.2622 (3) | 0.0466 (8) | |
C18 | 0.9898 (3) | 0.27771 (17) | 0.2350 (3) | 0.0346 (8) | |
H18 | 1.0844 | 0.2859 | 0.2565 | 0.042* | |
C15 | 0.7804 (4) | 0.30338 (18) | 0.1172 (3) | 0.0406 (9) | |
H15 | 0.7292 | 0.3298 | 0.0581 | 0.049* | |
C17 | 0.9179 (4) | 0.22308 (18) | 0.2898 (3) | 0.0437 (9) | |
H17 | 0.9663 | 0.1958 | 0.3493 | 0.052* | |
C16 | 0.7191 (4) | 0.24716 (19) | 0.1757 (4) | 0.0531 (11) | |
H16 | 0.6260 | 0.2362 | 0.1530 | 0.064* | |
H8B | 0.846 (4) | 0.456 (2) | −0.286 (2) | 0.068 (14)* | |
H7B | 0.561 (2) | 0.3912 (19) | −0.114 (3) | 0.051 (12)* | |
H8A | 0.962 (2) | 0.458 (2) | −0.215 (4) | 0.072 (15)* | |
H7A | 0.677 (4) | 0.3713 (14) | −0.164 (3) | 0.060 (13)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O4 | 0.0236 (13) | 0.0500 (14) | 0.0325 (13) | 0.0001 (10) | −0.0065 (10) | 0.0056 (10) |
Gd1 | 0.01908 (9) | 0.02429 (9) | 0.01873 (9) | −0.00065 (6) | −0.00063 (6) | 0.00041 (6) |
C1 | 0.0265 (18) | 0.0293 (17) | 0.0312 (18) | −0.0064 (14) | 0.0031 (14) | −0.0061 (13) |
C2 | 0.0285 (19) | 0.0401 (19) | 0.0329 (18) | −0.0074 (15) | 0.0037 (14) | −0.0097 (15) |
O8 | 0.0247 (14) | 0.0577 (16) | 0.0265 (13) | 0.0039 (12) | −0.0011 (10) | −0.0086 (11) |
O3 | 0.0396 (14) | 0.0452 (13) | 0.0211 (11) | −0.0065 (11) | 0.0049 (10) | 0.0059 (10) |
O5 | 0.0330 (13) | 0.0316 (12) | 0.0365 (13) | 0.0050 (10) | 0.0034 (10) | 0.0110 (10) |
O7 | 0.0241 (13) | 0.0315 (13) | 0.0443 (14) | −0.0043 (11) | 0.0060 (11) | −0.0117 (11) |
C3 | 0.034 (2) | 0.044 (2) | 0.041 (2) | −0.0027 (16) | 0.0047 (16) | −0.0115 (16) |
N1 | 0.081 (3) | 0.069 (2) | 0.045 (2) | 0.005 (2) | −0.0005 (19) | −0.0261 (18) |
C4 | 0.051 (3) | 0.046 (2) | 0.055 (2) | −0.0013 (19) | 0.006 (2) | −0.0177 (19) |
C7 | 0.0306 (19) | 0.0223 (15) | 0.0255 (16) | 0.0002 (13) | −0.0013 (14) | −0.0015 (12) |
N2 | 0.055 (2) | 0.069 (2) | 0.0329 (18) | 0.0093 (18) | −0.0135 (16) | 0.0028 (15) |
C12 | 0.031 (2) | 0.053 (2) | 0.0309 (18) | 0.0014 (16) | −0.0019 (15) | 0.0007 (15) |
C8 | 0.0297 (18) | 0.0334 (17) | 0.0240 (16) | 0.0024 (14) | 0.0004 (13) | 0.0019 (13) |
C11 | 0.037 (2) | 0.068 (3) | 0.043 (2) | 0.003 (2) | −0.0134 (18) | 0.0041 (19) |
C6 | 0.064 (3) | 0.057 (2) | 0.041 (2) | 0.015 (2) | −0.009 (2) | −0.0164 (18) |
C5 | 0.096 (4) | 0.079 (3) | 0.042 (2) | 0.023 (3) | −0.017 (2) | −0.021 (2) |
O6 | 0.0230 (13) | 0.0344 (12) | 0.0452 (14) | −0.0059 (10) | 0.0006 (10) | 0.0064 (10) |
C14 | 0.0225 (17) | 0.0227 (15) | 0.0292 (16) | −0.0012 (12) | 0.0007 (13) | 0.0012 (12) |
C13 | 0.0284 (19) | 0.0234 (15) | 0.0243 (16) | −0.0019 (13) | 0.0022 (13) | −0.0020 (12) |
C9 | 0.037 (2) | 0.081 (3) | 0.034 (2) | −0.002 (2) | −0.0031 (17) | 0.0075 (19) |
C10 | 0.058 (3) | 0.098 (3) | 0.028 (2) | 0.005 (3) | 0.0020 (19) | 0.011 (2) |
O1 | 0.0229 (12) | 0.0337 (12) | 0.0327 (12) | −0.0012 (9) | −0.0016 (10) | −0.0029 (9) |
O2 | 0.0234 (12) | 0.0436 (13) | 0.0303 (12) | 0.0047 (10) | −0.0004 (9) | −0.0121 (10) |
N3 | 0.0411 (19) | 0.0375 (17) | 0.062 (2) | −0.0076 (14) | 0.0088 (16) | 0.0150 (15) |
C18 | 0.0269 (19) | 0.0366 (18) | 0.040 (2) | −0.0009 (14) | 0.0018 (15) | 0.0075 (15) |
C15 | 0.032 (2) | 0.0389 (19) | 0.050 (2) | −0.0056 (15) | −0.0069 (17) | 0.0153 (16) |
C17 | 0.045 (2) | 0.039 (2) | 0.046 (2) | 0.0038 (17) | 0.0003 (18) | 0.0166 (16) |
C16 | 0.031 (2) | 0.051 (2) | 0.076 (3) | −0.0139 (18) | −0.007 (2) | 0.017 (2) |
O4—C7 | 1.250 (4) | C7—C8 | 1.508 (4) |
O4—Gd1i | 2.349 (2) | N2—C11 | 1.327 (5) |
Gd1—O5 | 2.326 (2) | N2—C10 | 1.332 (5) |
Gd1—O3 | 2.348 (2) | C12—C11 | 1.373 (5) |
Gd1—O4i | 2.349 (2) | C12—C8 | 1.377 (4) |
Gd1—O6ii | 2.391 (2) | C12—H12 | 0.9300 |
Gd1—O8 | 2.426 (2) | C8—C9 | 1.382 (5) |
Gd1—O7 | 2.442 (2) | C11—H11 | 0.9300 |
Gd1—O2 | 2.451 (2) | C6—C5 | 1.385 (5) |
Gd1—O1 | 2.576 (2) | C6—H6 | 0.9300 |
Gd1—C1 | 2.877 (3) | C5—H5 | 0.9300 |
C1—O1 | 1.258 (4) | O6—C13 | 1.242 (4) |
C1—O2 | 1.265 (4) | O6—Gd1ii | 2.391 (2) |
C1—C2 | 1.497 (4) | C14—C18 | 1.378 (4) |
C2—C6 | 1.380 (5) | C14—C15 | 1.384 (4) |
C2—C3 | 1.383 (5) | C14—C13 | 1.513 (4) |
O8—H8B | 0.822 (10) | C9—C10 | 1.387 (5) |
O8—H8A | 0.818 (10) | C9—H9 | 0.9300 |
O3—C7 | 1.251 (4) | C10—H10 | 0.9300 |
O5—C13 | 1.258 (3) | N3—C17 | 1.325 (5) |
O7—H7B | 0.819 (10) | N3—C16 | 1.328 (5) |
O7—H7A | 0.820 (10) | C18—C17 | 1.385 (5) |
C3—C4 | 1.382 (5) | C18—H18 | 0.9300 |
C3—H3 | 0.9300 | C15—C16 | 1.378 (5) |
N1—C5 | 1.319 (5) | C15—H15 | 0.9300 |
N1—C4 | 1.332 (5) | C17—H17 | 0.9300 |
C4—H4 | 0.9300 | C16—H16 | 0.9300 |
C7—O4—Gd1i | 126.1 (2) | C4—C3—C2 | 118.8 (3) |
O5—Gd1—O3 | 83.99 (8) | C4—C3—H3 | 120.6 |
O5—Gd1—O4i | 154.48 (8) | C2—C3—H3 | 120.6 |
O3—Gd1—O4i | 104.65 (8) | C5—N1—C4 | 116.4 (3) |
O5—Gd1—O6ii | 108.51 (7) | N1—C4—C3 | 123.8 (4) |
O3—Gd1—O6ii | 145.91 (8) | N1—C4—H4 | 118.1 |
O4i—Gd1—O6ii | 77.91 (7) | C3—C4—H4 | 118.1 |
O5—Gd1—O8 | 75.31 (8) | O4—C7—O3 | 124.3 (3) |
O3—Gd1—O8 | 140.12 (9) | O4—C7—C8 | 117.3 (3) |
O4i—Gd1—O8 | 83.28 (8) | O3—C7—C8 | 118.3 (3) |
O6ii—Gd1—O8 | 73.80 (8) | C11—N2—C10 | 116.1 (3) |
O5—Gd1—O7 | 82.98 (8) | C11—C12—C8 | 119.0 (3) |
O3—Gd1—O7 | 72.64 (8) | C11—C12—H12 | 120.5 |
O4i—Gd1—O7 | 77.04 (8) | C8—C12—H12 | 120.5 |
O6ii—Gd1—O7 | 138.85 (8) | C12—C8—C9 | 117.7 (3) |
O8—Gd1—O7 | 71.30 (8) | C12—C8—C7 | 121.7 (3) |
O5—Gd1—O2 | 76.63 (7) | C9—C8—C7 | 120.5 (3) |
O3—Gd1—O2 | 77.83 (7) | N2—C11—C12 | 124.6 (4) |
O4i—Gd1—O2 | 128.37 (8) | N2—C11—H11 | 117.7 |
O6ii—Gd1—O2 | 74.71 (7) | C12—C11—H11 | 117.7 |
O8—Gd1—O2 | 127.78 (8) | C2—C6—C5 | 118.6 (4) |
O7—Gd1—O2 | 145.57 (8) | C2—C6—H6 | 120.7 |
O5—Gd1—O1 | 125.61 (7) | C5—C6—H6 | 120.7 |
O3—Gd1—O1 | 70.81 (7) | N1—C5—C6 | 124.4 (4) |
O4i—Gd1—O1 | 79.75 (7) | N1—C5—H5 | 117.8 |
O6ii—Gd1—O1 | 76.40 (7) | C6—C5—H5 | 117.8 |
O8—Gd1—O1 | 148.16 (8) | C13—O6—Gd1ii | 121.92 (19) |
O7—Gd1—O1 | 129.45 (7) | C18—C14—C15 | 117.6 (3) |
O2—Gd1—O1 | 51.76 (7) | C18—C14—C13 | 121.0 (3) |
O5—Gd1—C1 | 100.79 (8) | C15—C14—C13 | 121.4 (3) |
O3—Gd1—C1 | 71.09 (8) | O6—C13—O5 | 124.4 (3) |
O4i—Gd1—C1 | 104.73 (8) | O6—C13—C14 | 117.7 (3) |
O6ii—Gd1—C1 | 75.38 (8) | O5—C13—C14 | 117.9 (3) |
O8—Gd1—C1 | 145.64 (9) | C8—C9—C10 | 118.9 (4) |
O7—Gd1—C1 | 142.88 (8) | C8—C9—H9 | 120.5 |
O2—Gd1—C1 | 25.92 (8) | C10—C9—H9 | 120.5 |
O1—Gd1—C1 | 25.92 (7) | N2—C10—C9 | 123.7 (4) |
O1—C1—O2 | 121.1 (3) | N2—C10—H10 | 118.2 |
O1—C1—C2 | 121.0 (3) | C9—C10—H10 | 118.2 |
O2—C1—C2 | 117.8 (3) | C1—O1—Gd1 | 90.52 (18) |
O1—C1—Gd1 | 63.55 (15) | C1—O2—Gd1 | 96.22 (17) |
O2—C1—Gd1 | 57.86 (15) | C17—N3—C16 | 116.3 (3) |
C2—C1—Gd1 | 171.8 (2) | C14—C18—C17 | 119.3 (3) |
C6—C2—C3 | 117.8 (3) | C14—C18—H18 | 120.4 |
C6—C2—C1 | 119.5 (3) | C17—C18—H18 | 120.4 |
C3—C2—C1 | 122.7 (3) | C16—C15—C14 | 118.6 (3) |
Gd1—O8—H8B | 125 (3) | C16—C15—H15 | 120.7 |
Gd1—O8—H8A | 122 (3) | C14—C15—H15 | 120.7 |
H8B—O8—H8A | 107 (4) | N3—C17—C18 | 123.7 (3) |
C7—O3—Gd1 | 169.9 (2) | N3—C17—H17 | 118.2 |
C13—O5—Gd1 | 171.0 (2) | C18—C17—H17 | 118.2 |
Gd1—O7—H7B | 123 (3) | N3—C16—C15 | 124.5 (3) |
Gd1—O7—H7A | 127 (3) | N3—C16—H16 | 117.8 |
H7B—O7—H7A | 105 (4) | C15—C16—H16 | 117.8 |
O5—Gd1—C1—O1 | −164.59 (17) | C8—C12—C11—N2 | −0.6 (6) |
O3—Gd1—C1—O1 | −84.84 (18) | C3—C2—C6—C5 | 1.9 (6) |
O4i—Gd1—C1—O1 | 15.90 (19) | C1—C2—C6—C5 | −179.3 (4) |
O6ii—Gd1—C1—O1 | 88.90 (18) | C4—N1—C5—C6 | 1.4 (8) |
O8—Gd1—C1—O1 | 115.70 (19) | C2—C6—C5—N1 | −3.2 (8) |
O7—Gd1—C1—O1 | −72.0 (2) | Gd1ii—O6—C13—O5 | 4.0 (4) |
O2—Gd1—C1—O1 | 173.9 (3) | Gd1ii—O6—C13—C14 | −174.64 (18) |
O5—Gd1—C1—O2 | 21.48 (19) | C18—C14—C13—O6 | 13.5 (4) |
O3—Gd1—C1—O2 | 101.23 (19) | C15—C14—C13—O6 | −168.9 (3) |
O4i—Gd1—C1—O2 | −158.03 (17) | C18—C14—C13—O5 | −165.2 (3) |
O6ii—Gd1—C1—O2 | −85.03 (18) | C15—C14—C13—O5 | 12.4 (4) |
O8—Gd1—C1—O2 | −58.2 (3) | C12—C8—C9—C10 | 3.0 (6) |
O7—Gd1—C1—O2 | 114.1 (2) | C7—C8—C9—C10 | −173.1 (3) |
O1—Gd1—C1—O2 | −173.9 (3) | C11—N2—C10—C9 | −0.9 (7) |
O1—C1—C2—C6 | 155.2 (3) | C8—C9—C10—N2 | −1.6 (7) |
O2—C1—C2—C6 | −23.0 (5) | O2—C1—O1—Gd1 | 6.0 (3) |
O1—C1—C2—C3 | −26.1 (5) | C2—C1—O1—Gd1 | −172.2 (3) |
O2—C1—C2—C3 | 155.7 (3) | O5—Gd1—O1—C1 | 18.7 (2) |
O5—Gd1—O3—C7 | 95.4 (12) | O3—Gd1—O1—C1 | 86.05 (18) |
O4i—Gd1—O3—C7 | −109.1 (12) | O4i—Gd1—O1—C1 | −164.38 (18) |
O6ii—Gd1—O3—C7 | −19.1 (13) | O6ii—Gd1—O1—C1 | −84.47 (18) |
O8—Gd1—O3—C7 | 153.8 (12) | O8—Gd1—O1—C1 | −105.5 (2) |
O7—Gd1—O3—C7 | 179.9 (11), | O7—Gd1—O1—C1 | 131.98 (17) |
O2—Gd1—O3—C7 | 17.8 (12) | O2—Gd1—O1—C1 | −3.37 (17) |
O1—Gd1—O3—C7 | −35.7 (12) | O1—C1—O2—Gd1 | −6.3 (3) |
C1—Gd1—O3—C7 | −8.2 (12) | C2—C1—O2—Gd1 | 171.9 (2) |
C6—C2—C3—C4 | 0.8 (5) | O5—Gd1—O2—C1 | −158.30 (19) |
C1—C2—C3—C4 | −177.9 (3) | O3—Gd1—O2—C1 | −71.67 (18) |
C5—N1—C4—C3 | 1.6 (6) | O4i—Gd1—O2—C1 | 27.5 (2) |
C2—C3—C4—N1 | −2.7 (6) | O6ii—Gd1—O2—C1 | 87.92 (19) |
Gd1i—O4—C7—O3 | −17.4 (4) | O8—Gd1—O2—C1 | 142.63 (18) |
Gd1i—O4—C7—C8 | 160.10 (19) | O7—Gd1—O2—C1 | −103.0 (2) |
Gd1—O3—C7—O4 | 120.9 (11) | O1—Gd1—O2—C1 | 3.37 (17) |
Gd1—O3—C7—C8 | −56.5 (13) | C15—C14—C18—C17 | −2.1 (5) |
C11—C12—C8—C9 | −2.0 (5) | C13—C14—C18—C17 | 175.6 (3) |
C11—C12—C8—C7 | 174.1 (3) | C18—C14—C15—C16 | 1.1 (5) |
O4—C7—C8—C12 | −178.6 (3) | C13—C14—C15—C16 | −176.6 (3) |
O3—C7—C8—C12 | −1.0 (4) | C16—N3—C17—C18 | 0.8 (6) |
O4—C7—C8—C9 | −2.6 (5) | C14—C18—C17—N3 | 1.2 (6) |
O3—C7—C8—C9 | 175.1 (3) | C17—N3—C16—C15 | −1.9 (6) |
C10—N2—C11—C12 | 2.1 (6) | C14—C15—C16—N3 | 1.0 (6) |
Symmetry codes: (i) −x+1, −y+1, −z; (ii) −x+2, −y+1, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O8—H8B···N2iii | 0.82 (1) | 1.99 (1) | 2.805 (4) | 175 (4) |
O7—H7A···N3iv | 0.82 (1) | 1.99 (1) | 2.807 (4) | 176 (4) |
O7—H7B···O1i | 0.82 (1) | 2.00 (2) | 2.788 (3) | 161 (4) |
O8—H8A···O2ii | 0.82 (1) | 1.97 (2) | 2.759 (3) | 162 (4) |
Symmetry codes: (i) −x+1, −y+1, −z; (ii) −x+2, −y+1, −z; (iii) x, y, z−1; (iv) x, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | [Gd(C6H4NO2)3(H2O)2] |
Mr | 559.59 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 9.4786 (6), 18.9589 (11), 10.7557 (6) |
β (°) | 92.313 (1) |
V (Å3) | 1931.3 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.49 |
Crystal size (mm) | 0.39 × 0.31 × 0.26 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2000) |
Tmin, Tmax | 0.286, 0.404 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9640, 3435, 3102 |
Rint | 0.023 |
(sin θ/λ)max (Å−1) | 0.597 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.020, 0.044, 1.06 |
No. of reflections | 3435 |
No. of parameters | 288 |
No. of restraints | 4 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.61, −0.62 |
Computer programs: SMART (Bruker, 1999), SAINT (Bruker, 1999), SAINT, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Bruker, 2000), SHELXTL.
Gd1—O5 | 2.326 (2) | Gd1—O8 | 2.426 (2) |
Gd1—O3 | 2.348 (2) | Gd1—O7 | 2.442 (2) |
Gd1—O4i | 2.349 (2) | Gd1—O2 | 2.451 (2) |
Gd1—O6ii | 2.391 (2) | Gd1—O1 | 2.576 (2) |
Symmetry codes: (i) −x+1, −y+1, −z; (ii) −x+2, −y+1, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O8—H8B···N2iii | 0.822 (10) | 1.986 (12) | 2.805 (4) | 175 (4) |
O7—H7A···N3iv | 0.820 (10) | 1.989 (11) | 2.807 (4) | 176 (4) |
O7—H7B···O1i | 0.819 (10) | 2.001 (16) | 2.788 (3) | 161 (4) |
O8—H8A···O2ii | 0.818 (10) | 1.968 (16) | 2.759 (3) | 162 (4) |
Symmetry codes: (i) −x+1, −y+1, −z; (ii) −x+2, −y+1, −z; (iii) x, y, z−1; (iv) x, −y+1/2, z−1/2. |
The interest in crystal engineering of coordination polymers originates from their potential applications as materials for molecular selection, ion exchange, catalysis, and because of their intriguing variety of architectures and topologies (Yaghi et al., 1998, 2003; Eddaoudi et al., 2001; Moulton & Zaworotko, 2001). In particular, isonicotinate metal complexes are of considerable interest because isonicotinic acid plays an important role in the metabolism of all living cells (Sorenson, 1976), and acts as a versatile ligand to construct supramolecular architectures (Aakeroy et al., 1999; Burrows et al., 1998). Moreover, isonicotinate metal complexes find also use as drugs (Sorenson, 1976). In this article we report on the crystal structure of the title complex (I), a new coordination polymer of isonicotinic acid with GdIII.
A part of the monomeric structure of (I) is shown in Fig. 1 and selected geometric parameters are gathered in Table 1. The GdIII cation is coordinated by eight O atoms in a distorted bicapped trigonal-prismatic environment. The [GdO8] polyhedron is built by two O atoms from two water molecules, by four carboxylate O atoms of bridging isonicotinate anions and by two carboxylate O atoms of chelating isonicotinate anions. Each adjacent GdIII is bridged by two O atoms of two isonicotinate ligands to form an infinite chain along the a axis. The bond lengths of C7—O3, C7—O4 and C13—O5, C13—O6 are 1.251 (4), 1.250 (4) Å and 1.258 (3), 1.242 (4) Å, respectively, indicating that a delocalized π-bond is present.
Adjacent chains are linked into a framework structure by hydrogen bond interactions. Two types of hydrogen bonds are present in (I) (Table 2): One type is formed between O atoms of the coordinating water molecules and the N atoms of the isonicotinate ligands (O7—H7A···N3 and O8—H8B···N2), whereas the other type consists of O atoms of the coordinating water molecules and the carboxylate O atoms of the isonicotinate ligands (O7—H7B···O1, O8—H8A···O2).