metal-organic compounds
Poly[diaquabis(2,2′-bipyridine)tris(μ4-2,2′-bipyridine-4,4′-dicarboxylato)dineodymium(III)]
aDepartment of Chemistry, Fu Jen Catholic University, Taipei 24205, Taiwan
*Correspondence e-mail: chem2022@mails.fju.edu.tw
In the 2(C12H6N2O4)3(C10H8N2)2(H2O)2]n, the NdIII ion is in an octahedral coordination environment formed by one water molecule, one chelating 2,2′-bipyridine ligand, and five monodentate carboxylate groups. The local around the NdIII ion is a bicapped trigonal prism. Two NdIII centers are bridged by four carboxylate groups to form an Nd2 dimeric unit; these are further connected by 2,2′-bipyridine-4,4′-dicarboxylate linkers, resulting in a layered coordination network.
of the title mixed-ligand coordination polymer, [NdRelated literature
Only lanthanide-2,2′-bipyridine-4,4′-dicarboxylate-based coordination polymers with three-dimensional porous framework structures have been previously reported (Wu et al., 2006).
Experimental
Crystal data
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Refinement
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Data collection: COLLECT (Nonius, 2000); cell SCALEPACK (Otwinowski & Minor 1997); data reduction: DENZO (Otwinowski & Minor 1997) and SCALEPACK; 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); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
https://doi.org/10.1107/S1600536807067396/ww2111sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536807067396/ww2111Isup2.hkl
All reagents and solvents were used as obtained without further purification. Nd(NO3)3.6H2O (0.30 mmol, 131.7 mg), 2,2'-bipyridine (0.40 mmol, 62.5 mg), 2,2'-bipyridine-4,4'-dicarboxylic acid (0.15 mmol, 36.8 mg) were dissolved in 5.0 ml of distilled water. The mixture was sealed in a Teflon-lined stainless steel vessel and held at 453 K for 96 h. The vessel was gradually cooled to room temperature, and violet crystals suitable for crystallographic analysis were obtained in the yield of 65% based on 2,2'-bipyridine-4,4'-dicarboxylic acid.
The C-bound H atoms were placed in calculated positions (C—H = 0.93 Å) and refined in the riding-model approximation with Uiso(H) = 1.2 Ueq(C). The N-bound H atoms were observed in a difference Fourier map, but were placed in calculated positions (N—H = 0.86 Å) and refined in the riding-model approximation with Uiso(H) = 1.2 Ueq(N). The H atoms of the coordinated water molecules were located in a difference Fourier map, and refined as riding model with Uiso(H) = 1.5 Ueq(O). A longer Nd(1)—O(7) distance of 2.513 (2) Å is observed may be attributed to the loosely bound water molecule.
As shown in figure 1, a NdIII cation, one 2,2'-bipyridine (bpy) ligand, one coordinated water molecule, as well as one and a half of the 2,2'-bipyridine-4,4'-dicarboxylate (bpdc) ligands were observed in the crystallographic
The observation of symmetrical C?O bond lengths range from 1.252 (3) Å to 1.267 (4) Å indicated that all of the carboxyl groups of the bpdc ligands are deprotonated to achieve charge neutrality with the NdIII cation. The formula of the title compound is assigned to be [Nd2(C10H8N2)2(C12H6N2O4)3(H2O)2]n.The NdIII ion exists in an eight-coordinated environment formed by one water molecule, one chelating bpy ligand, and five monodentate carboxylate groups of the bpdc ligands. The local coordination geometry around NdIII ion is a bicapped trigonal prism polyhedron. Two NdIII centers are bridged by four carboxylate groups to become a Nd2-dimer unit (Figure 2). An inversion center is located at the center of the Nd···Nd axis.
As shown in Figure 3, the Nd2-dimer unit is linked through the bpdc ligands to form a layered coordination network. The bpdc ligands present two distinct types of bridging coordination environments, a bis(monodentate) mode as well as a bis(syn,syn-bridging bidentate) mode. Due to the high oxophilicity (hard acid-hard base interaction) of the lanthanide ions, the bipyridine group of the bpdc ligand is not involved in coordination. Two of the bis(syn,syn-bridging bidentate) type bpdc bridging ligands are stacked in a parallel fashion. However, no obvious π–π interactions between the inter-ligand pyridine rings are observed (centroid-to-centroid distance of 4.04 Å and dihedral angle of 19.89°). Both of the hydrogen atoms of the coordinated water molecule O7 serve as hydrogen-bonding donors to form two intra-layer and one inter-layer hydrogen-bonding interactions with the oxygen atoms of the carboxylate groups. It is worthwhile noting that the inter-layer O–H···O hydrogen-bonding interactions play an import role in the stabilization of the layer-to-layer stacking in the of the title compound. In addition, several intra-layer C–H···O interactions are also observed for the title compound, despite their weakness.
Solely bpdc-based lanthanide coordination polymers with three-dimensional porous framework structures were previously reported (Wu et al., 2006). The diversity in structure dimensionality between the title compound and the compounds reported by Wu et al. may be attributed to the presence of chelating bpy ligands in the title compound that capped the connectivity of NdIII ions, and leads to a two-dimensional layered network. Further investigations on mixed-ligand coordination modes with lanthanide ions toward the control of structure topology and network dimensionality are in progress.
Solely lanthanide-2,2'-bipyridine-4,4'-dicarboxylate-based coordination polymers with three-dimensional porous framework structures have been previously reported (Wu et al., 2006).
Data collection: COLLECT (Nonius, 2000); cell
SCALEPACK (Otwinowski & Minor 1997); data reduction: DENZO and SCALEPACK (Otwinowski & Minor 1997); 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); software used to prepare material for publication: WinGX (Farrugia, 1999).Fig. 1. The atom numbering scheme of the title compound presented in the crystallographically asymmetric unit. The atomic displacement ellipsoids are drawn at the 50% probability level. | |
Fig. 2. Highlight of coordination environment of the Nd(III) ions. (Key: blue: N; red: O; gray: C; auqa sphere: water molecules; purple sphere: Nd). Hydrogen atoms are omitted for clarity. (Symmetry code: (i) 1–x, 1–y, 1–z) Inset: a view of the bicapped trigonal prism polyhedron around NdIII ion. | |
Fig. 3. A view of the layer network of the title compound. (Key: auqa sphere: water molecules; purple polyhedra: Nd) Hydrogen atoms are omitted for clarity. |
[Nd2(C12H6N2O4)3(C10H8N2)2(H2O)2] | Z = 2 |
Mr = 681.72 | F(000) = 676 |
Triclinic, P1 | Dx = 1.763 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.9914 (2) Å | Cell parameters from 12726 reflections |
b = 12.5409 (3) Å | θ = 2.0–25.4° |
c = 12.7455 (3) Å | µ = 2.08 mm−1 |
α = 67.809 (2)° | T = 200 K |
β = 88.645 (2)° | Prism, white |
γ = 75.437 (1)° | 0.5 × 0.4 × 0.2 mm |
V = 1283.89 (6) Å3 |
Nonius KappaCCD diffractometer | 4669 independent reflections |
Radiation source: sealed tube | 4460 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.042 |
φ and ω scans | θmax = 25.3°, θmin = 2.4° |
Absorption correction: multi-scan (SORTAV; Blessing, 1995) | h = −10→10 |
Tmin = 0.398, Tmax = 0.660 | k = −14→15 |
16411 measured reflections | l = −15→15 |
Refinement on F2 | H-atom parameters constrained |
Least-squares matrix: full | w = 1/[σ2(Fo2) + (0.0265P)2 + 1.2551P] where P = (Fo2 + 2Fc2)/3 |
R[F2 > 2σ(F2)] = 0.022 | (Δ/σ)max = 0.002 |
wR(F2) = 0.061 | Δρmax = 0.56 e Å−3 |
S = 1.17 | Δρmin = −0.97 e Å−3 |
4669 reflections | Extinction correction: SHELXL97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
371 parameters | Extinction coefficient: 0.0065 (5) |
0 restraints |
[Nd2(C12H6N2O4)3(C10H8N2)2(H2O)2] | γ = 75.437 (1)° |
Mr = 681.72 | V = 1283.89 (6) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.9914 (2) Å | Mo Kα radiation |
b = 12.5409 (3) Å | µ = 2.08 mm−1 |
c = 12.7455 (3) Å | T = 200 K |
α = 67.809 (2)° | 0.5 × 0.4 × 0.2 mm |
β = 88.645 (2)° |
Nonius KappaCCD diffractometer | 4669 independent reflections |
Absorption correction: multi-scan (SORTAV; Blessing, 1995) | 4460 reflections with I > 2σ(I) |
Tmin = 0.398, Tmax = 0.660 | Rint = 0.042 |
16411 measured reflections |
R[F2 > 2σ(F2)] = 0.022 | 0 restraints |
wR(F2) = 0.061 | H-atom parameters constrained |
S = 1.17 | Δρmax = 0.56 e Å−3 |
4669 reflections | Δρmin = −0.97 e Å−3 |
371 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. |
x | y | z | Uiso*/Ueq | ||
Nd1 | 0.302446 (16) | 0.648646 (11) | 0.499494 (11) | 0.01470 (8) | |
O1 | 0.4250 (2) | 0.69456 (18) | 0.32145 (16) | 0.0229 (5) | |
O2 | 0.6003 (2) | 0.53012 (18) | 0.32891 (16) | 0.0235 (5) | |
O3 | 0.5424 (2) | 0.65947 (18) | −0.43231 (16) | 0.0223 (4) | |
O4 | 0.7188 (3) | 0.49332 (18) | −0.41903 (17) | 0.0241 (5) | |
O5 | 0.0710 (2) | 0.77124 (17) | 0.38374 (17) | 0.0225 (4) | |
O6 | −0.1170 (3) | 0.68020 (19) | 0.39864 (18) | 0.0284 (5) | |
O7 | 0.0896 (2) | 0.55410 (18) | 0.58438 (17) | 0.0233 (4) | |
H7A | 0.0142 | 0.5913 | 0.5371 | 0.035* | |
H7B | 0.1141 | 0.4849 | 0.592 | 0.035* | |
N1 | 0.1807 (3) | 0.7494 (2) | 0.6388 (2) | 0.0215 (5) | |
N2 | 0.3019 (3) | 0.8746 (2) | 0.4497 (2) | 0.0223 (5) | |
N3 | 0.4653 (3) | 0.7593 (2) | −0.0901 (2) | 0.0258 (6) | |
N4 | 0.7976 (3) | 0.5136 (3) | −0.0406 (2) | 0.0291 (6) | |
N5 | −0.1566 (3) | 0.9404 (2) | −0.0166 (2) | 0.0234 (5) | |
C1 | 0.1138 (4) | 0.6873 (3) | 0.7282 (2) | 0.0251 (7) | |
H1 | 0.1275 | 0.6047 | 0.7452 | 0.03* | |
C2 | 0.0265 (4) | 0.7370 (3) | 0.7965 (3) | 0.0312 (7) | |
H2 | −0.0176 | 0.6897 | 0.8598 | 0.037* | |
C3 | 0.0047 (4) | 0.8573 (3) | 0.7704 (3) | 0.0369 (8) | |
H3 | −0.0571 | 0.8947 | 0.8147 | 0.044* | |
C4 | 0.0731 (4) | 0.9226 (3) | 0.6797 (3) | 0.0323 (8) | |
H4 | 0.0592 | 1.0055 | 0.6611 | 0.039* | |
C5 | 0.1628 (4) | 0.8665 (3) | 0.6156 (2) | 0.0221 (6) | |
C6 | 0.2415 (4) | 0.9319 (3) | 0.5180 (3) | 0.0235 (6) | |
C7 | 0.2558 (5) | 1.0458 (3) | 0.4987 (3) | 0.0376 (8) | |
H7 | 0.2134 | 1.0844 | 0.5481 | 0.045* | |
C8 | 0.3316 (5) | 1.1022 (3) | 0.4078 (3) | 0.0426 (9) | |
H8 | 0.3426 | 1.1796 | 0.3943 | 0.051* | |
C9 | 0.3913 (5) | 1.0454 (3) | 0.3366 (3) | 0.0382 (8) | |
H9 | 0.4428 | 1.0828 | 0.2726 | 0.046* | |
C10 | 0.3740 (4) | 0.9320 (3) | 0.3610 (3) | 0.0306 (7) | |
H10 | 0.4157 | 0.8925 | 0.3121 | 0.037* | |
C11 | 0.5080 (3) | 0.6300 (2) | 0.2764 (2) | 0.0178 (6) | |
C12 | 0.4949 (3) | 0.6758 (2) | 0.1476 (2) | 0.0173 (6) | |
C13 | 0.5869 (3) | 0.6123 (2) | 0.0900 (2) | 0.0187 (6) | |
H13 | 0.6611 | 0.5394 | 0.1309 | 0.022* | |
C14 | 0.5690 (3) | 0.6570 (2) | −0.0282 (2) | 0.0187 (6) | |
C15 | 0.3785 (4) | 0.8189 (3) | −0.0329 (3) | 0.0306 (8) | |
H15 | 0.3048 | 0.8915 | −0.0754 | 0.037* | |
C16 | 0.3893 (4) | 0.7814 (3) | 0.0843 (2) | 0.0248 (7) | |
H16 | 0.3252 | 0.8275 | 0.1206 | 0.03* | |
C17 | 0.6656 (3) | 0.5932 (2) | −0.0944 (2) | 0.0193 (6) | |
C18 | 0.6182 (3) | 0.6167 (2) | −0.2056 (2) | 0.0183 (6) | |
H18 | 0.5249 | 0.6749 | −0.2412 | 0.022* | |
C19 | 0.7085 (3) | 0.5544 (2) | −0.2641 (2) | 0.0177 (6) | |
C20 | 0.8448 (4) | 0.4715 (3) | −0.2093 (3) | 0.0267 (7) | |
H20 | 0.9094 | 0.4265 | −0.2464 | 0.032* | |
C21 | 0.8844 (4) | 0.4559 (3) | −0.0993 (3) | 0.0347 (8) | |
H21 | 0.9795 | 0.4007 | −0.063 | 0.042* | |
C22 | 0.6534 (3) | 0.5710 (2) | −0.3818 (2) | 0.0182 (6) | |
C23 | −0.0411 (3) | 0.7506 (2) | 0.3433 (2) | 0.0190 (6) | |
C24 | −0.0843 (3) | 0.8186 (2) | 0.2173 (2) | 0.0197 (6) | |
C25 | −0.0014 (3) | 0.8963 (2) | 0.1525 (2) | 0.0189 (6) | |
H25 | 0.082 | 0.9084 | 0.187 | 0.023* | |
C26 | −0.0414 (3) | 0.9566 (2) | 0.0364 (2) | 0.0181 (6) | |
C27 | −0.2347 (4) | 0.8644 (3) | 0.0472 (3) | 0.0307 (7) | |
H27 | −0.3158 | 0.8519 | 0.0107 | 0.037* | |
C28 | −0.2040 (4) | 0.8027 (3) | 0.1641 (3) | 0.0294 (7) | |
H28 | −0.2641 | 0.7508 | 0.2062 | 0.035* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Nd1 | 0.02095 (11) | 0.01231 (10) | 0.01183 (10) | −0.00483 (6) | 0.00305 (6) | −0.00552 (7) |
O1 | 0.0345 (12) | 0.0225 (11) | 0.0154 (10) | −0.0109 (9) | 0.0101 (9) | −0.0095 (8) |
O2 | 0.0321 (12) | 0.0209 (11) | 0.0154 (10) | −0.0086 (9) | 0.0020 (8) | −0.0036 (8) |
O3 | 0.0259 (11) | 0.0226 (11) | 0.0192 (10) | −0.0087 (9) | −0.0010 (8) | −0.0073 (8) |
O4 | 0.0366 (12) | 0.0228 (11) | 0.0216 (11) | −0.0120 (9) | 0.0075 (9) | −0.0157 (9) |
O5 | 0.0247 (11) | 0.0169 (10) | 0.0236 (11) | −0.0065 (8) | −0.0019 (8) | −0.0043 (8) |
O6 | 0.0287 (12) | 0.0233 (11) | 0.0281 (12) | −0.0128 (9) | 0.0017 (9) | −0.0007 (9) |
O7 | 0.0286 (12) | 0.0204 (10) | 0.0214 (11) | −0.0085 (9) | 0.0041 (9) | −0.0075 (8) |
N1 | 0.0286 (14) | 0.0169 (12) | 0.0195 (13) | −0.0039 (10) | 0.0028 (10) | −0.0088 (10) |
N2 | 0.0296 (14) | 0.0190 (12) | 0.0193 (13) | −0.0070 (11) | 0.0024 (10) | −0.0081 (10) |
N3 | 0.0301 (15) | 0.0262 (14) | 0.0153 (12) | 0.0019 (11) | −0.0001 (10) | −0.0074 (11) |
N4 | 0.0280 (15) | 0.0361 (16) | 0.0196 (13) | 0.0024 (12) | −0.0004 (11) | −0.0134 (12) |
N5 | 0.0254 (14) | 0.0251 (13) | 0.0221 (13) | −0.0107 (11) | 0.0017 (10) | −0.0091 (11) |
C1 | 0.0348 (18) | 0.0187 (15) | 0.0188 (15) | −0.0041 (13) | 0.0030 (13) | −0.0057 (12) |
C2 | 0.043 (2) | 0.0305 (17) | 0.0203 (16) | −0.0108 (15) | 0.0096 (14) | −0.0101 (13) |
C3 | 0.047 (2) | 0.0352 (19) | 0.0346 (19) | −0.0062 (16) | 0.0157 (16) | −0.0243 (16) |
C4 | 0.048 (2) | 0.0223 (16) | 0.0309 (18) | −0.0077 (15) | 0.0094 (15) | −0.0160 (14) |
C5 | 0.0270 (16) | 0.0174 (14) | 0.0233 (15) | −0.0044 (12) | −0.0005 (12) | −0.0101 (12) |
C6 | 0.0285 (16) | 0.0194 (15) | 0.0231 (15) | −0.0067 (12) | 0.0006 (12) | −0.0083 (12) |
C7 | 0.059 (2) | 0.0209 (16) | 0.038 (2) | −0.0137 (16) | 0.0098 (17) | −0.0158 (15) |
C8 | 0.065 (3) | 0.0225 (17) | 0.045 (2) | −0.0208 (17) | 0.0118 (19) | −0.0121 (16) |
C9 | 0.052 (2) | 0.0279 (18) | 0.036 (2) | −0.0203 (17) | 0.0109 (17) | −0.0074 (15) |
C10 | 0.042 (2) | 0.0252 (16) | 0.0267 (17) | −0.0139 (15) | 0.0093 (14) | −0.0090 (13) |
C11 | 0.0227 (15) | 0.0181 (14) | 0.0152 (14) | −0.0121 (12) | 0.0047 (11) | −0.0053 (11) |
C12 | 0.0224 (15) | 0.0181 (14) | 0.0134 (13) | −0.0103 (11) | 0.0049 (11) | −0.0053 (11) |
C13 | 0.0213 (15) | 0.0167 (13) | 0.0178 (14) | −0.0052 (11) | 0.0016 (11) | −0.0060 (11) |
C14 | 0.0206 (14) | 0.0207 (14) | 0.0160 (14) | −0.0063 (12) | 0.0026 (11) | −0.0078 (11) |
C15 | 0.0338 (18) | 0.0276 (17) | 0.0179 (15) | 0.0100 (14) | −0.0024 (13) | −0.0063 (13) |
C16 | 0.0251 (16) | 0.0271 (16) | 0.0188 (15) | 0.0001 (13) | 0.0043 (12) | −0.0096 (13) |
C17 | 0.0231 (15) | 0.0188 (14) | 0.0168 (14) | −0.0064 (12) | 0.0034 (11) | −0.0073 (11) |
C18 | 0.0214 (15) | 0.0157 (13) | 0.0188 (14) | −0.0066 (11) | 0.0026 (11) | −0.0066 (11) |
C19 | 0.0252 (15) | 0.0154 (13) | 0.0158 (14) | −0.0091 (11) | 0.0037 (11) | −0.0073 (11) |
C20 | 0.0277 (17) | 0.0299 (17) | 0.0236 (16) | −0.0023 (13) | 0.0046 (13) | −0.0149 (13) |
C21 | 0.0308 (19) | 0.039 (2) | 0.0249 (17) | 0.0097 (15) | −0.0022 (14) | −0.0140 (15) |
C22 | 0.0241 (15) | 0.0188 (14) | 0.0171 (14) | −0.0145 (12) | 0.0057 (11) | −0.0073 (12) |
C23 | 0.0207 (15) | 0.0122 (13) | 0.0231 (15) | −0.0017 (11) | 0.0005 (12) | −0.0070 (11) |
C24 | 0.0207 (15) | 0.0157 (13) | 0.0227 (15) | −0.0053 (11) | 0.0027 (11) | −0.0069 (11) |
C25 | 0.0184 (14) | 0.0184 (14) | 0.0233 (15) | −0.0055 (11) | 0.0028 (11) | −0.0114 (12) |
C26 | 0.0177 (14) | 0.0148 (13) | 0.0232 (15) | −0.0027 (11) | 0.0040 (11) | −0.0097 (12) |
C27 | 0.0308 (18) | 0.0354 (18) | 0.0309 (18) | −0.0197 (15) | −0.0020 (14) | −0.0110 (14) |
C28 | 0.0313 (18) | 0.0287 (17) | 0.0282 (17) | −0.0182 (14) | 0.0015 (13) | −0.0044 (14) |
Nd1—O5 | 2.386 (2) | C4—H4 | 0.95 |
Nd1—O3i | 2.399 (2) | C5—C6 | 1.484 (4) |
Nd1—O4ii | 2.4120 (19) | C6—C7 | 1.394 (4) |
Nd1—O1 | 2.4309 (19) | C7—C8 | 1.376 (5) |
Nd1—O2iii | 2.4443 (19) | C7—H7 | 0.95 |
Nd1—O7 | 2.513 (2) | C8—C9 | 1.376 (5) |
Nd1—N1 | 2.618 (2) | C8—H8 | 0.95 |
Nd1—N2 | 2.659 (2) | C9—C10 | 1.385 (5) |
O1—C11 | 1.252 (3) | C9—H9 | 0.95 |
O2—C11 | 1.256 (3) | C10—H10 | 0.95 |
O2—Nd1iii | 2.4443 (19) | C11—C12 | 1.517 (4) |
O3—C22 | 1.255 (4) | C12—C16 | 1.379 (4) |
O3—Nd1iv | 2.399 (2) | C12—C13 | 1.392 (4) |
O4—C22 | 1.252 (3) | C13—C14 | 1.392 (4) |
O4—Nd1ii | 2.4120 (19) | C13—H13 | 0.95 |
O5—C23 | 1.267 (4) | C14—C17 | 1.494 (4) |
O6—C23 | 1.246 (4) | C15—C16 | 1.384 (4) |
O7—H7A | 0.8298 | C15—H15 | 0.95 |
O7—H7B | 0.8078 | C16—H16 | 0.95 |
N1—C1 | 1.341 (4) | C17—C18 | 1.388 (4) |
N1—C5 | 1.351 (4) | C18—C19 | 1.385 (4) |
N2—C10 | 1.342 (4) | C18—H18 | 0.95 |
N2—C6 | 1.350 (4) | C19—C20 | 1.386 (4) |
N3—C15 | 1.338 (4) | C19—C22 | 1.512 (4) |
N3—C14 | 1.344 (4) | C20—C21 | 1.384 (5) |
N4—C21 | 1.337 (4) | C20—H20 | 0.95 |
N4—C17 | 1.343 (4) | C21—H21 | 0.95 |
N5—C27 | 1.336 (4) | C23—C24 | 1.512 (4) |
N5—C26 | 1.347 (4) | C24—C28 | 1.380 (4) |
C1—C2 | 1.376 (4) | C24—C25 | 1.384 (4) |
C1—H1 | 0.95 | C25—C26 | 1.390 (4) |
C2—C3 | 1.379 (5) | C25—H25 | 0.95 |
C2—H2 | 0.95 | C26—C26v | 1.488 (6) |
C3—C4 | 1.374 (5) | C27—C28 | 1.391 (5) |
C3—H3 | 0.95 | C27—H27 | 0.95 |
C4—C5 | 1.390 (4) | C28—H28 | 0.95 |
O5—Nd1—O3i | 141.66 (7) | C6—C7—H7 | 120.1 |
O5—Nd1—O4ii | 85.16 (7) | C9—C8—C7 | 119.3 (3) |
O3i—Nd1—O4ii | 123.72 (7) | C9—C8—H8 | 120.4 |
O5—Nd1—O1 | 85.06 (7) | C7—C8—H8 | 120.4 |
O3i—Nd1—O1 | 81.99 (7) | C8—C9—C10 | 118.0 (3) |
O4ii—Nd1—O1 | 71.54 (7) | C8—C9—H9 | 121 |
O5—Nd1—O2iii | 142.08 (7) | C10—C9—H9 | 121 |
O3i—Nd1—O2iii | 72.10 (7) | N2—C10—C9 | 123.9 (3) |
O4ii—Nd1—O2iii | 83.53 (7) | N2—C10—H10 | 118.1 |
O1—Nd1—O2iii | 124.64 (7) | C9—C10—H10 | 118.1 |
O5—Nd1—O7 | 73.07 (7) | O1—C11—O2 | 125.5 (3) |
O3i—Nd1—O7 | 136.56 (7) | O1—C11—C12 | 117.3 (2) |
O4ii—Nd1—O7 | 70.18 (7) | O2—C11—C12 | 117.2 (2) |
O1—Nd1—O7 | 137.04 (7) | C16—C12—C13 | 118.2 (3) |
O2iii—Nd1—O7 | 69.04 (7) | C16—C12—C11 | 120.5 (3) |
O5—Nd1—N1 | 82.69 (7) | C13—C12—C11 | 121.3 (2) |
O3i—Nd1—N1 | 84.74 (7) | C12—C13—C14 | 119.2 (3) |
O4ii—Nd1—N1 | 143.82 (8) | C12—C13—H13 | 120.4 |
O1—Nd1—N1 | 140.45 (7) | C14—C13—H13 | 120.4 |
O2iii—Nd1—N1 | 85.45 (7) | N3—C14—C13 | 122.8 (3) |
O7—Nd1—N1 | 73.68 (7) | N3—C14—C17 | 115.7 (2) |
O5—Nd1—N2 | 72.54 (7) | C13—C14—C17 | 121.5 (3) |
O3i—Nd1—N2 | 69.59 (7) | N3—C15—C16 | 124.1 (3) |
O4ii—Nd1—N2 | 144.11 (7) | N3—C15—H15 | 118 |
O1—Nd1—N2 | 78.68 (7) | C16—C15—H15 | 118 |
O2iii—Nd1—N2 | 130.91 (7) | C12—C16—C15 | 118.8 (3) |
O7—Nd1—N2 | 126.03 (7) | C12—C16—H16 | 120.6 |
N1—Nd1—N2 | 61.78 (7) | C15—C16—H16 | 120.6 |
C11—O1—Nd1 | 132.49 (18) | N4—C17—C18 | 122.9 (3) |
C11—O2—Nd1iii | 152.00 (19) | N4—C17—C14 | 116.5 (2) |
C22—O3—Nd1iv | 124.74 (17) | C18—C17—C14 | 120.6 (3) |
C22—O4—Nd1ii | 148.51 (19) | C19—C18—C17 | 119.3 (3) |
C23—O5—Nd1 | 134.30 (17) | C19—C18—H18 | 120.3 |
Nd1—O7—H7A | 105 | C17—C18—H18 | 120.3 |
Nd1—O7—H7B | 109.2 | C18—C19—C20 | 118.4 (3) |
H7A—O7—H7B | 109.9 | C18—C19—C22 | 120.3 (3) |
C1—N1—C5 | 118.2 (3) | C20—C19—C22 | 121.2 (3) |
C1—N1—Nd1 | 118.68 (19) | C21—C20—C19 | 118.3 (3) |
C5—N1—Nd1 | 122.42 (19) | C21—C20—H20 | 120.8 |
C10—N2—C6 | 117.7 (3) | C19—C20—H20 | 120.8 |
C10—N2—Nd1 | 120.7 (2) | N4—C21—C20 | 124.2 (3) |
C6—N2—Nd1 | 121.29 (19) | N4—C21—H21 | 117.9 |
C15—N3—C14 | 116.9 (3) | C20—C21—H21 | 117.9 |
C21—N4—C17 | 116.9 (3) | O4—C22—O3 | 125.5 (3) |
C27—N5—C26 | 117.3 (3) | O4—C22—C19 | 117.3 (3) |
N1—C1—C2 | 123.4 (3) | O3—C22—C19 | 117.1 (2) |
N1—C1—H1 | 118.3 | O6—C23—O5 | 125.5 (3) |
C2—C1—H1 | 118.3 | O6—C23—C24 | 118.5 (3) |
C1—C2—C3 | 118.2 (3) | O5—C23—C24 | 116.1 (2) |
C1—C2—H2 | 120.9 | C28—C24—C25 | 118.7 (3) |
C3—C2—H2 | 120.9 | C28—C24—C23 | 121.0 (3) |
C4—C3—C2 | 119.4 (3) | C25—C24—C23 | 120.3 (3) |
C4—C3—H3 | 120.3 | C24—C25—C26 | 119.4 (3) |
C2—C3—H3 | 120.3 | C24—C25—H25 | 120.3 |
C3—C4—C5 | 119.6 (3) | C26—C25—H25 | 120.3 |
C3—C4—H4 | 120.2 | N5—C26—C25 | 122.4 (3) |
C5—C4—H4 | 120.2 | N5—C26—C26v | 116.1 (3) |
N1—C5—C4 | 121.2 (3) | C25—C26—C26v | 121.5 (3) |
N1—C5—C6 | 116.8 (3) | N5—C27—C28 | 123.8 (3) |
C4—C5—C6 | 122.0 (3) | N5—C27—H27 | 118.1 |
N2—C6—C7 | 121.3 (3) | C28—C27—H27 | 118.1 |
N2—C6—C5 | 116.7 (3) | C24—C28—C27 | 118.4 (3) |
C7—C6—C5 | 121.9 (3) | C24—C28—H28 | 120.8 |
C8—C7—C6 | 119.8 (3) | C27—C28—H28 | 120.8 |
C8—C7—H7 | 120.1 |
Symmetry codes: (i) x, y, z+1; (ii) −x+1, −y+1, −z; (iii) −x+1, −y+1, −z+1; (iv) x, y, z−1; (v) −x, −y+2, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O7—H7A···O6 | 0.83 | 1.92 | 2.731 (3) | 164 |
O7—H7A···O5 | 0.83 | 2.53 | 2.918 (3) | 110 |
O7—H7B···O6vi | 0.81 | 2.02 | 2.811 (3) | 165 |
Symmetry code: (vi) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Nd2(C12H6N2O4)3(C10H8N2)2(H2O)2] |
Mr | 681.72 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 200 |
a, b, c (Å) | 8.9914 (2), 12.5409 (3), 12.7455 (3) |
α, β, γ (°) | 67.809 (2), 88.645 (2), 75.437 (1) |
V (Å3) | 1283.89 (6) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 2.08 |
Crystal size (mm) | 0.5 × 0.4 × 0.2 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | Multi-scan (SORTAV; Blessing, 1995) |
Tmin, Tmax | 0.398, 0.660 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16411, 4669, 4460 |
Rint | 0.042 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.022, 0.061, 1.17 |
No. of reflections | 4669 |
No. of parameters | 371 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.56, −0.97 |
Computer programs: COLLECT (Nonius, 2000), DENZO and SCALEPACK (Otwinowski & Minor 1997), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).
Nd1—O5 | 2.386 (2) | Nd1—N2 | 2.659 (2) |
Nd1—O3i | 2.399 (2) | O1—C11 | 1.252 (3) |
Nd1—O4ii | 2.4120 (19) | O2—C11 | 1.256 (3) |
Nd1—O1 | 2.4309 (19) | O3—C22 | 1.255 (4) |
Nd1—O2iii | 2.4443 (19) | O4—C22 | 1.252 (3) |
Nd1—O7 | 2.513 (2) | O5—C23 | 1.267 (4) |
Nd1—N1 | 2.618 (2) | O6—C23 | 1.246 (4) |
O5—Nd1—O4ii | 85.16 (7) | O5—Nd1—N1 | 82.69 (7) |
O5—Nd1—O1 | 85.06 (7) | O3i—Nd1—N1 | 84.74 (7) |
O3i—Nd1—O1 | 81.99 (7) | O2iii—Nd1—N1 | 85.45 (7) |
O4ii—Nd1—O1 | 71.54 (7) | O7—Nd1—N1 | 73.68 (7) |
O3i—Nd1—O2iii | 72.10 (7) | O5—Nd1—N2 | 72.54 (7) |
O4ii—Nd1—O2iii | 83.53 (7) | O3i—Nd1—N2 | 69.59 (7) |
O5—Nd1—O7 | 73.07 (7) | O1—Nd1—N2 | 78.68 (7) |
O4ii—Nd1—O7 | 70.18 (7) | N1—Nd1—N2 | 61.78 (7) |
O2iii—Nd1—O7 | 69.04 (7) |
Symmetry codes: (i) x, y, z+1; (ii) −x+1, −y+1, −z; (iii) −x+1, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O7—H7A···O6 | 0.83 | 1.92 | 2.731 (3) | 164 |
O7—H7A···O5 | 0.83 | 2.53 | 2.918 (3) | 110 |
O7—H7B···O6iv | 0.81 | 2.02 | 2.811 (3) | 165 |
Symmetry code: (iv) −x, −y+1, −z+1. |
Acknowledgements
The authors gratefully acknowledge the financial support of the National Science Council and Fu Jen Catholic University, Taiwan.
References
Blessing, R. H. (1995). Acta Cryst. A51, 33–38. CrossRef CAS Web of Science IUCr Journals Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837–838. CrossRef CAS IUCr Journals Google Scholar
Nonius (2000). COLLECT. Nonius BV, Delft, The Netherlands. Google Scholar
Otwinowski, Z. & Minor, W. (1997). Methods in Enzymology, Vol. 276, Macromolecular Crystallography, Part A, edited by C. W. Carter Jr & R. M. Sweet, pp. 307–326. New York: Academic Press. Google Scholar
Sheldrick, G. M. (1997). SHELXS97 and SHELXL97. University of Göttingen, Germany. Google Scholar
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
As shown in figure 1, a NdIII cation, one 2,2'-bipyridine (bpy) ligand, one coordinated water molecule, as well as one and a half of the 2,2'-bipyridine-4,4'-dicarboxylate (bpdc) ligands were observed in the crystallographic asymmetric unit. The observation of symmetrical C?O bond lengths range from 1.252 (3) Å to 1.267 (4) Å indicated that all of the carboxyl groups of the bpdc ligands are deprotonated to achieve charge neutrality with the NdIII cation. The formula of the title compound is assigned to be [Nd2(C10H8N2)2(C12H6N2O4)3(H2O)2]n.
The NdIII ion exists in an eight-coordinated environment formed by one water molecule, one chelating bpy ligand, and five monodentate carboxylate groups of the bpdc ligands. The local coordination geometry around NdIII ion is a bicapped trigonal prism polyhedron. Two NdIII centers are bridged by four carboxylate groups to become a Nd2-dimer unit (Figure 2). An inversion center is located at the center of the Nd···Nd axis.
As shown in Figure 3, the Nd2-dimer unit is linked through the bpdc ligands to form a layered coordination network. The bpdc ligands present two distinct types of bridging coordination environments, a bis(monodentate) mode as well as a bis(syn,syn-bridging bidentate) mode. Due to the high oxophilicity (hard acid-hard base interaction) of the lanthanide ions, the bipyridine group of the bpdc ligand is not involved in coordination. Two of the bis(syn,syn-bridging bidentate) type bpdc bridging ligands are stacked in a parallel fashion. However, no obvious π–π interactions between the inter-ligand pyridine rings are observed (centroid-to-centroid distance of 4.04 Å and dihedral angle of 19.89°). Both of the hydrogen atoms of the coordinated water molecule O7 serve as hydrogen-bonding donors to form two intra-layer and one inter-layer hydrogen-bonding interactions with the oxygen atoms of the carboxylate groups. It is worthwhile noting that the inter-layer O–H···O hydrogen-bonding interactions play an import role in the stabilization of the layer-to-layer stacking in the crystal structure of the title compound. In addition, several intra-layer C–H···O interactions are also observed for the title compound, despite their weakness.
Solely bpdc-based lanthanide coordination polymers with three-dimensional porous framework structures were previously reported (Wu et al., 2006). The diversity in structure dimensionality between the title compound and the compounds reported by Wu et al. may be attributed to the presence of chelating bpy ligands in the title compound that capped the connectivity of NdIII ions, and leads to a two-dimensional layered network. Further investigations on mixed-ligand coordination modes with lanthanide ions toward the control of structure topology and network dimensionality are in progress.