Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S160053680703721X/fi2039sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S160053680703721X/fi2039Isup2.hkl |
Purple block-shaped crystals were hydrothermally synthesized from a mixture of Nd(NO3)3 (99%, Shanghai Reagent Company), Cu(NO3)2 (99.5%, Tianjin Bodi Reagent Company), HCO2H (88%, Tianjin Taixing Reagent factory), H2O, tetraethylammoniumhydroxide (10%, Beijing chemical factory), and guanidine nitrate (98%, Shanghai Reagent Company). In a typical synthesis, Nd(NO3)3 (0.3464 g), Cu(NO3)2 (0.0525 g), guanidine nitrate (0.7882 g) were dissolved in the solvent of water (8.0 g) followed by the addition of HCO2H (0.7169 g) and tetraethylammoniumhydroxide (0.7131 g) with constant stirring. Finally, the mixture was kept in a 25 ml Teflon-lined steel autoclave at 180 °C for 7 days. The autoclave was slowly cooled to room temperature, and then the product was filtered, washed with distilled water, and dried at room temperature. Purple block-shaped crystals of title compound were obtained.
The highest peak in the difference map is 1.17 e/Å3, and 0.85 (2) Å from Nd1, while the minimum peak is 0.77 (2) Å from Nd1. The H atom was located from the Fourier map.
Recently, the synthesis of three dimensional frameworks with new topological structures has received great attention, due to their functional applications in catalysis, adsorption, ion-exchange, and radioactive waste remediation. As the building elements of open-frameworks, not only silicon, but germanium and carbon have been choosen to synthesize new open-frameworks (Li et al., 1998; Lin et al., 2003; Plévert et al., 2001; Xu, Fan, Chino et al., 2004; Xu, Fan, Elangovan et al., 2004; Xu, Cheng & You, 2006; Xu, Ding et al.,2006). In the last few years, an important advance in porous materials has been achieved by the study of transition metal carbonates. The diamond-type Na2Zn3(CO3)4·3H2O was reported by Gier et al. (1996), while the face-centered (FC) cubic [Zn6(CO3)12(CH6N3)8Na3[N(CH3)4]·2H2O was synthesized by Abrahams et al. (2004). Compared with other transition metals, the rare-earth elements adopt a large range of coordination numbers. The structure of title compound has been determined by powder diffraction (Dexpert & Caro, 1973). Even a hexagonal high-temperature modification is known (Christensen, 1973). In this work, we synthesized the title compound as single crystals suitable for a structure determination.
The structure features a three-dimensional framework constructed from NdO10 polyhedra and carbonates. As in the previously reported Sm(CO3)(OH), the asymmetric unit of the title compound contains five independent non-H atoms, and all of them belong to the inorganic framework (Fig. 1). The Nd atom is coordinated by ten O atoms from CO32- and OH- anions. The C atom is coordinated by three O atoms with C—O distances ranging from 1.269 (7) to 1.289 (4) Å and angles ranging from 119.4 (5) to 120.2 (2)°. Each C atom makes eight C—O—Nd linkages through bridging O atoms. While each OH- group acts as a µ2-bridging ligang linking two Nd atoms to generate a [Nd—O]n chain. Furthermore, the [Nd—O]n chains are connected by CO32- anions to form a three-dimensional inorganic framework, as shown in Fig. 2. The Nd atom has the typical geometrical parameters, with Nd—O distances in the range 2.346 (4)–2.750 (3) Å. The O—Nd—O angles are between 49.2 (1) and 156.6 (2)°. These bond distances and angles are in agreement with those found in the reported rare-earth compounds (Xu, Ding et al., 2006). The O—H anions are involved in hydrogen bonding with each other; the shortest O···O distance is 3.107 (4) Å and the O—H···O angle is 154 (7)°.
For an earlier structure determination of the title compound from powder data, see: Dexpert & Caro (1973). For a high-temperature modification, see: Christensen (1973). For similar framework materials, see: Li et al. (1998); Lin et al. (2003); Plévert et al. (2001); Xu, Fan, Chino et al. (2004); Xu, Fan, Elangovan et al. (2004); Xu, Cheng & You (2006); Xu, Ding et al. (2006). For related literature, see: Abrahams et al. (2004); Gier et al. (1996).
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SHELXTL (Sheldrick, 1997a); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997b); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997b); molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
[Nd(CO3)(OH)] | F(000) = 396 |
Mr = 221.26 | Dx = 4.823 Mg m−3 |
Orthorhombic, Pnma | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2n | Cell parameters from 1700 reflections |
a = 7.231 (5) Å | θ = 3.7–27.0° |
b = 4.964 (4) Å | µ = 16.86 mm−1 |
c = 8.489 (6) Å | T = 293 K |
V = 304.7 (4) Å3 | Block, pink |
Z = 4 | 0.08 × 0.08 × 0.06 mm |
Bruker APEXII CCD diffractometer | 424 independent reflections |
Radiation source: fine-focus sealed tube | 399 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
ω scans | θmax = 28.7°, θmin = 3.7° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | h = −3→9 |
Tmin = 0.346, Tmax = 0.431 | k = −6→6 |
1730 measured reflections | l = −10→11 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.020 | Only H-atom coordinates refined |
wR(F2) = 0.050 | w = 1/[σ2(Fo2) + (0.0319P)2 + 0.2734P] where P = (Fo2 + 2Fc2)/3 |
S = 1.07 | (Δ/σ)max = 0.015 |
424 reflections | Δρmax = 1.17 e Å−3 |
38 parameters | Δρmin = −1.09 e Å−3 |
1 restraint | Extinction correction: SHELXL97 (Sheldrick, 1997b), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.040 (2) |
[Nd(CO3)(OH)] | V = 304.7 (4) Å3 |
Mr = 221.26 | Z = 4 |
Orthorhombic, Pnma | Mo Kα radiation |
a = 7.231 (5) Å | µ = 16.86 mm−1 |
b = 4.964 (4) Å | T = 293 K |
c = 8.489 (6) Å | 0.08 × 0.08 × 0.06 mm |
Bruker APEXII CCD diffractometer | 424 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | 399 reflections with I > 2σ(I) |
Tmin = 0.346, Tmax = 0.431 | Rint = 0.027 |
1730 measured reflections |
R[F2 > 2σ(F2)] = 0.020 | 1 restraint |
wR(F2) = 0.050 | Only H-atom coordinates refined |
S = 1.07 | Δρmax = 1.17 e Å−3 |
424 reflections | Δρmin = −1.09 e Å−3 |
38 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 | Occ. (<1) | |
Nd1 | 0.35584 (4) | 0.2500 | 0.83332 (3) | 0.00774 (18) | |
O1 | 0.1525 (3) | −0.0258 (6) | 0.6121 (4) | 0.0095 (6) | |
O2 | 0.0386 (6) | 0.2500 | 0.8949 (5) | 0.0144 (9) | |
H1 | 0.000 (14) | 0.154 (15) | 0.970 (7) | 0.017* | 0.50 |
O3 | 0.2941 (7) | −0.2500 | 0.8032 (5) | 0.0141 (9) | |
C1 | 0.1960 (9) | −0.2500 | 0.6793 (6) | 0.0074 (11) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Nd1 | 0.0073 (2) | 0.0066 (2) | 0.0093 (2) | 0.000 | 0.00035 (9) | 0.000 |
O1 | 0.0106 (14) | 0.0075 (15) | 0.0103 (14) | 0.0010 (10) | 0.0005 (10) | 0.0007 (13) |
O2 | 0.010 (2) | 0.024 (2) | 0.0089 (19) | 0.000 | 0.0002 (16) | 0.000 |
O3 | 0.021 (2) | 0.008 (2) | 0.0140 (19) | 0.000 | −0.0064 (18) | 0.000 |
C1 | 0.007 (3) | 0.006 (3) | 0.009 (3) | 0.000 | 0.0028 (19) | 0.000 |
Nd1—O2i | 2.346 (4) | Nd1—C1 | 3.034 (4) |
Nd1—O2 | 2.353 (4) | O1—C1 | 1.289 (4) |
Nd1—O3 | 2.535 (2) | O1—Nd1vii | 2.587 (3) |
Nd1—O3ii | 2.535 (2) | O1—Nd1viii | 2.616 (4) |
Nd1—O1iii | 2.587 (3) | O2—Nd1vii | 2.346 (4) |
Nd1—O1i | 2.587 (3) | O2—H1 | 0.84 (2) |
Nd1—O1iv | 2.616 (4) | O3—C1 | 1.269 (7) |
Nd1—O1v | 2.616 (4) | O3—Nd1ix | 2.535 (2) |
Nd1—O1 | 2.750 (3) | C1—O1x | 1.289 (4) |
Nd1—O1vi | 2.750 (3) | C1—Nd1viii | 2.961 (6) |
Nd1—C1v | 2.961 (6) | C1—Nd1ix | 3.034 (4) |
O2i—Nd1—O2 | 137.14 (12) | O3—Nd1—C1v | 94.45 (10) |
O2i—Nd1—O3 | 90.92 (11) | O3ii—Nd1—C1v | 94.45 (10) |
O2—Nd1—O3 | 81.41 (12) | O1iii—Nd1—C1v | 85.83 (13) |
O2i—Nd1—O3ii | 90.92 (11) | O1i—Nd1—C1v | 85.83 (13) |
O2—Nd1—O3ii | 81.41 (12) | O1iv—Nd1—C1v | 25.80 (8) |
O3—Nd1—O3ii | 156.6 (2) | O1v—Nd1—C1v | 25.80 (8) |
O2i—Nd1—O1iii | 71.38 (12) | O1—Nd1—C1v | 127.56 (12) |
O2—Nd1—O1iii | 140.24 (10) | O1vi—Nd1—C1v | 127.56 (12) |
O3—Nd1—O1iii | 133.04 (13) | O2i—Nd1—C1 | 81.87 (12) |
O3ii—Nd1—O1iii | 69.26 (14) | O2—Nd1—C1 | 74.00 (13) |
O2i—Nd1—O1i | 71.38 (11) | O3—Nd1—C1 | 24.29 (13) |
O2—Nd1—O1i | 140.24 (10) | O3ii—Nd1—C1 | 133.66 (14) |
O3—Nd1—O1i | 69.26 (14) | O1iii—Nd1—C1 | 145.70 (13) |
O3ii—Nd1—O1i | 133.04 (13) | O1i—Nd1—C1 | 87.72 (14) |
O1iii—Nd1—O1i | 63.92 (14) | O1iv—Nd1—C1 | 136.82 (12) |
O2i—Nd1—O1iv | 139.50 (10) | O1v—Nd1—C1 | 91.91 (12) |
O2—Nd1—O1iv | 77.08 (11) | O1—Nd1—C1 | 25.14 (11) |
O3—Nd1—O1iv | 120.24 (12) | O1vi—Nd1—C1 | 84.79 (12) |
O3ii—Nd1—O1iv | 70.77 (12) | C1v—Nd1—C1 | 112.29 (9) |
O1iii—Nd1—O1iv | 68.40 (10) | C1—O1—Nd1vii | 125.5 (3) |
O1i—Nd1—O1iv | 94.72 (7) | C1—O1—Nd1viii | 92.2 (3) |
O2i—Nd1—O1v | 139.50 (10) | Nd1vii—O1—Nd1viii | 111.60 (10) |
O2—Nd1—O1v | 77.08 (11) | C1—O1—Nd1 | 89.9 (3) |
O3—Nd1—O1v | 70.77 (12) | Nd1vii—O1—Nd1 | 93.30 (11) |
O3ii—Nd1—O1v | 120.24 (12) | Nd1viii—O1—Nd1 | 147.34 (11) |
O1iii—Nd1—O1v | 94.72 (7) | Nd1vii—O2—Nd1 | 111.45 (17) |
O1i—Nd1—O1v | 68.40 (10) | Nd1vii—O2—H1 | 116 (7) |
O1iv—Nd1—O1v | 50.35 (15) | Nd1—O2—H1 | 119 (7) |
O2i—Nd1—O1 | 74.76 (12) | C1—O3—Nd1 | 100.49 (10) |
O2—Nd1—O1 | 68.32 (11) | C1—O3—Nd1ix | 100.49 (10) |
O3—Nd1—O1 | 49.42 (12) | Nd1—O3—Nd1ix | 156.6 (2) |
O3ii—Nd1—O1 | 108.93 (12) | O3—C1—O1x | 120.2 (3) |
O1iii—Nd1—O1 | 146.02 (6) | O3—C1—O1 | 120.2 (3) |
O1i—Nd1—O1 | 107.59 (12) | O1x—C1—O1 | 119.4 (5) |
O1iv—Nd1—O1 | 144.81 (6) | O3—C1—Nd1viii | 153.3 (4) |
O1v—Nd1—O1 | 113.18 (5) | O1x—C1—Nd1viii | 62.0 (2) |
O2i—Nd1—O1vi | 74.76 (12) | O1—C1—Nd1viii | 62.0 (2) |
O2—Nd1—O1vi | 68.32 (11) | O3—C1—Nd1 | 55.22 (10) |
O3—Nd1—O1vi | 108.93 (12) | O1x—C1—Nd1 | 171.7 (4) |
O3ii—Nd1—O1vi | 49.42 (12) | O1—C1—Nd1 | 65.0 (2) |
O1iii—Nd1—O1vi | 107.59 (12) | Nd1viii—C1—Nd1 | 118.41 (10) |
O1i—Nd1—O1vi | 146.02 (6) | O3—C1—Nd1ix | 55.22 (10) |
O1iv—Nd1—O1vi | 113.18 (5) | O1x—C1—Nd1ix | 65.0 (2) |
O1v—Nd1—O1vi | 144.81 (6) | O1—C1—Nd1ix | 171.7 (4) |
O1—Nd1—O1vi | 59.71 (14) | Nd1viii—C1—Nd1ix | 118.41 (10) |
O2i—Nd1—C1v | 152.98 (16) | Nd1—C1—Nd1ix | 109.76 (19) |
O2—Nd1—C1v | 69.88 (16) |
Symmetry codes: (i) x+1/2, y, −z+3/2; (ii) x, y+1, z; (iii) x+1/2, −y+1/2, −z+3/2; (iv) −x+1/2, y+1/2, z+1/2; (v) −x+1/2, −y, z+1/2; (vi) x, −y+1/2, z; (vii) x−1/2, y, −z+3/2; (viii) −x+1/2, −y, z−1/2; (ix) x, y−1, z; (x) x, −y−1/2, z. |
Experimental details
Crystal data | |
Chemical formula | [Nd(CO3)(OH)] |
Mr | 221.26 |
Crystal system, space group | Orthorhombic, Pnma |
Temperature (K) | 293 |
a, b, c (Å) | 7.231 (5), 4.964 (4), 8.489 (6) |
V (Å3) | 304.7 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 16.86 |
Crystal size (mm) | 0.08 × 0.08 × 0.06 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2003) |
Tmin, Tmax | 0.346, 0.431 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 1730, 424, 399 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.676 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.020, 0.050, 1.07 |
No. of reflections | 424 |
No. of parameters | 38 |
No. of restraints | 1 |
H-atom treatment | Only H-atom coordinates refined |
Δρmax, Δρmin (e Å−3) | 1.17, −1.09 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXTL (Sheldrick, 1997a), SHELXS97 (Sheldrick, 1997b), SHELXL97 (Sheldrick, 1997b), SHELXTL.
Nd1—O2i | 2.346 (4) | Nd1—O1i | 2.587 (3) |
Nd1—O2 | 2.353 (4) | Nd1—O1iv | 2.616 (4) |
Nd1—O3 | 2.535 (2) | Nd1—O1v | 2.616 (4) |
Nd1—O3ii | 2.535 (2) | Nd1—O1 | 2.750 (3) |
Nd1—O1iii | 2.587 (3) | Nd1—O1vi | 2.750 (3) |
Symmetry codes: (i) x+1/2, y, −z+3/2; (ii) x, y+1, z; (iii) x+1/2, −y+1/2, −z+3/2; (iv) −x+1/2, y+1/2, z+1/2; (v) −x+1/2, −y, z+1/2; (vi) x, −y+1/2, z. |
Recently, the synthesis of three dimensional frameworks with new topological structures has received great attention, due to their functional applications in catalysis, adsorption, ion-exchange, and radioactive waste remediation. As the building elements of open-frameworks, not only silicon, but germanium and carbon have been choosen to synthesize new open-frameworks (Li et al., 1998; Lin et al., 2003; Plévert et al., 2001; Xu, Fan, Chino et al., 2004; Xu, Fan, Elangovan et al., 2004; Xu, Cheng & You, 2006; Xu, Ding et al.,2006). In the last few years, an important advance in porous materials has been achieved by the study of transition metal carbonates. The diamond-type Na2Zn3(CO3)4·3H2O was reported by Gier et al. (1996), while the face-centered (FC) cubic [Zn6(CO3)12(CH6N3)8Na3[N(CH3)4]·2H2O was synthesized by Abrahams et al. (2004). Compared with other transition metals, the rare-earth elements adopt a large range of coordination numbers. The structure of title compound has been determined by powder diffraction (Dexpert & Caro, 1973). Even a hexagonal high-temperature modification is known (Christensen, 1973). In this work, we synthesized the title compound as single crystals suitable for a structure determination.
The structure features a three-dimensional framework constructed from NdO10 polyhedra and carbonates. As in the previously reported Sm(CO3)(OH), the asymmetric unit of the title compound contains five independent non-H atoms, and all of them belong to the inorganic framework (Fig. 1). The Nd atom is coordinated by ten O atoms from CO32- and OH- anions. The C atom is coordinated by three O atoms with C—O distances ranging from 1.269 (7) to 1.289 (4) Å and angles ranging from 119.4 (5) to 120.2 (2)°. Each C atom makes eight C—O—Nd linkages through bridging O atoms. While each OH- group acts as a µ2-bridging ligang linking two Nd atoms to generate a [Nd—O]n chain. Furthermore, the [Nd—O]n chains are connected by CO32- anions to form a three-dimensional inorganic framework, as shown in Fig. 2. The Nd atom has the typical geometrical parameters, with Nd—O distances in the range 2.346 (4)–2.750 (3) Å. The O—Nd—O angles are between 49.2 (1) and 156.6 (2)°. These bond distances and angles are in agreement with those found in the reported rare-earth compounds (Xu, Ding et al., 2006). The O—H anions are involved in hydrogen bonding with each other; the shortest O···O distance is 3.107 (4) Å and the O—H···O angle is 154 (7)°.