metal-organic compounds
[(2R,3S)-Butane-1,2,3,4-tetraol-κ3O1,O2,O3](ethanol-κO)tris(nitrato-κ2O,O′)samarium(III)
aChemical Engineering College, Inner Mongolia University of Technology, People's Republic of China, bBeijing National Laboratory for Molecular Sciences, The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, People's Republic of China, and cState Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing, People's Republic of China
*Correspondence e-mail: yanglm@pku.edu.cn
The title SmIII–erythritol complex, [Sm(NO3)3(C2H6O)(C4H10O4)], is isotypic with its Nd, Eu, Y, Gd, Tb and Ho analogues. The SmIII cation exhibits a of ten and is chelated by a tridentate erythritol ligand and three bidentate nitrate anions. It is additionally coordinated by an O atom of an ethanol molecule, completing an irregular coordination sphere. The Sm—O bond lengths range from 2.416 (2) to 2.611 (2) Å. In the crystal, extensive O—H⋯O hydrogen bonding involving all hydroxy groups and some of the nitrate O atoms links the molecules into a three-dimensional network.
Related literature
For background to the coordination behaviour of sugars to metal cations, see: Gottschaldt & Schubert (2009). For the of free erythritol, see: Bekoe & Powell (1959). For isotypic structures of the title compound, see: Yang et al. (2003, 2004, 2012); Hua et al. (2013).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku, 2007); cell CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: XP in SHELXTL; software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536813003255/wm2711sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813003255/wm2711Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813003255/wm2711Isup3.cdx
Sm(NO3)3.6H2O (3 mmol) and erythritol (3 mmol) were dissolved in 6 ml water and 6 ml ethanol. The solution was put on a water bath, and the temperature was raised to 353 K. Small aliquots of EtOH were periodically added to the solution during the heating process to prolong the reaction time. The resulting mixture was filtered and left for crystallization at room temperature. Suitable crystals for X-ray diffraction measuraments were obtained in the course of two weeks.
C-bound H-atoms were placed in calculated positions and were included in the
in the riding model approximation, Uiso(H) = 1.5Ueq(C) for methyl group carbon atoms, Uiso(H) = 1.2Ueq(C) for the other carbon atoms. O-bound H atoms were located in a difference Fourier map and were refined with distance constraints of O—H = 0.84 Å, Uiso(H) = 1.2Ueq(O). The two highest peaks in the difference map are 1.33 and 0.97 e- per Å3, respectively. The corresponding distances to the nearest atom, Sm1, are 0.866 and 0.864 Å.Data collection: CrystalClear (Rigaku, 2007); cell
CrystalClear (Rigaku, 2007); data reduction: CrystalClear (Rigaku, 2007); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The molecular structure of the title complex with displacement ellipsoids drawn at the 30% probability level. Hydrogen atoms have been omitted for clarity. | |
Fig. 2. The packing of the title complex, showing hydrogen bond interactions as dashed lines. |
[Sm(NO3)3(C2H6O)(C4H10O4)] | F(000) = 988 |
Mr = 504.57 | Dx = 2.213 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 5882 reflections |
a = 7.8537 (16) Å | θ = 1.4–27.5° |
b = 12.875 (3) Å | µ = 3.96 mm−1 |
c = 15.252 (3) Å | T = 173 K |
β = 100.92 (3)° | Block, colorless |
V = 1514.4 (5) Å3 | 0.27 × 0.21 × 0.16 mm |
Z = 4 |
Rigaku Saturn724+ CCD diffractometer | 3446 independent reflections |
Radiation source: fine-focus sealed tube | 3315 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.035 |
Detector resolution: 28.5714 pixels mm-1 | θmax = 27.5°, θmin = 2.1° |
ω scans fixed at = 45° | h = −10→10 |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2007) | k = −16→15 |
Tmin = 0.488, Tmax = 1.000 | l = −19→19 |
10349 measured reflections |
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)] = 0.029 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.057 | H-atom parameters constrained |
S = 1.22 | w = 1/[σ2(Fo2) + (0.010P)2 + 2.6923P] where P = (Fo2 + 2Fc2)/3 |
3446 reflections | (Δ/σ)max = 0.001 |
218 parameters | Δρmax = 1.33 e Å−3 |
0 restraints | Δρmin = −0.72 e Å−3 |
[Sm(NO3)3(C2H6O)(C4H10O4)] | V = 1514.4 (5) Å3 |
Mr = 504.57 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.8537 (16) Å | µ = 3.96 mm−1 |
b = 12.875 (3) Å | T = 173 K |
c = 15.252 (3) Å | 0.27 × 0.21 × 0.16 mm |
β = 100.92 (3)° |
Rigaku Saturn724+ CCD diffractometer | 3446 independent reflections |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2007) | 3315 reflections with I > 2σ(I) |
Tmin = 0.488, Tmax = 1.000 | Rint = 0.035 |
10349 measured reflections |
R[F2 > 2σ(F2)] = 0.029 | 0 restraints |
wR(F2) = 0.057 | H-atom parameters constrained |
S = 1.22 | Δρmax = 1.33 e Å−3 |
3446 reflections | Δρmin = −0.72 e Å−3 |
218 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | ||
Sm1 | 0.12473 (2) | 0.103866 (13) | 0.245568 (11) | 0.01311 (6) | |
O2 | −0.1453 (3) | 0.19005 (18) | 0.26026 (15) | 0.0152 (5) | |
H2 | −0.1627 | 0.2536 | 0.2497 | 0.018* | |
O7 | 0.1854 (3) | −0.09504 (18) | 0.26433 (17) | 0.0191 (5) | |
O12 | 0.1760 (3) | 0.2978 (2) | 0.23049 (18) | 0.0226 (6) | |
O9 | −0.0707 (3) | 0.0131 (2) | 0.11892 (18) | 0.0237 (6) | |
O3 | −0.0744 (3) | 0.00648 (18) | 0.32999 (16) | 0.0172 (5) | |
H3 | −0.1087 | −0.0539 | 0.3152 | 0.021* | |
O1 | 0.1328 (3) | 0.17252 (18) | 0.39375 (16) | 0.0171 (5) | |
H1 | 0.1753 | 0.1387 | 0.4398 | 0.021* | |
O10 | −0.0309 (3) | 0.1772 (2) | 0.10178 (17) | 0.0219 (5) | |
O14 | 0.4196 (3) | 0.3751 (2) | 0.2861 (2) | 0.0298 (6) | |
O11 | −0.2048 (3) | 0.0930 (2) | −0.00145 (18) | 0.0284 (6) | |
O6 | 0.3562 (3) | 0.00887 (19) | 0.35122 (17) | 0.0202 (5) | |
O4 | −0.2725 (3) | −0.0768 (2) | 0.45451 (17) | 0.0217 (5) | |
H4 | −0.3741 | −0.0886 | 0.4274 | 0.026* | |
N1 | 0.3140 (4) | −0.0835 (2) | 0.3280 (2) | 0.0187 (6) | |
N2 | −0.1050 (4) | 0.0942 (2) | 0.0709 (2) | 0.0209 (7) | |
O13 | 0.3997 (3) | 0.20661 (19) | 0.28786 (18) | 0.0233 (6) | |
O8 | 0.3934 (4) | −0.1577 (2) | 0.36532 (19) | 0.0288 (6) | |
O5 | 0.3062 (3) | 0.0520 (2) | 0.14084 (17) | 0.0225 (6) | |
H5 | 0.2654 | 0.0050 | 0.1047 | 0.027* | |
N3 | 0.3355 (4) | 0.2958 (2) | 0.2693 (2) | 0.0180 (6) | |
C5 | 0.4524 (4) | 0.0950 (3) | 0.1065 (3) | 0.0218 (8) | |
H5A | 0.5248 | 0.0378 | 0.0904 | 0.026* | |
H5B | 0.5250 | 0.1374 | 0.1535 | 0.026* | |
C3 | −0.2160 (4) | 0.0631 (3) | 0.3569 (2) | 0.0155 (7) | |
H3A | −0.3252 | 0.0467 | 0.3137 | 0.019* | |
C4 | −0.2402 (4) | 0.0320 (3) | 0.4494 (2) | 0.0195 (7) | |
H4A | −0.1348 | 0.0504 | 0.4933 | 0.023* | |
H4B | −0.3388 | 0.0712 | 0.4650 | 0.023* | |
C2 | −0.1785 (4) | 0.1780 (3) | 0.3500 (2) | 0.0166 (7) | |
H2A | −0.2836 | 0.2190 | 0.3562 | 0.020* | |
C1 | −0.0225 (4) | 0.2200 (3) | 0.4137 (2) | 0.0191 (7) | |
H1A | −0.0164 | 0.2964 | 0.4072 | 0.023* | |
H1B | −0.0328 | 0.2042 | 0.4760 | 0.023* | |
C6 | 0.3896 (5) | 0.1610 (3) | 0.0262 (3) | 0.0275 (9) | |
H6A | 0.3223 | 0.1182 | −0.0212 | 0.041* | |
H6B | 0.4892 | 0.1912 | 0.0052 | 0.041* | |
H6C | 0.3162 | 0.2168 | 0.0421 | 0.041* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Sm1 | 0.01387 (8) | 0.01135 (10) | 0.01389 (10) | −0.00053 (6) | 0.00207 (6) | −0.00031 (7) |
O2 | 0.0215 (12) | 0.0087 (12) | 0.0153 (12) | 0.0035 (9) | 0.0037 (9) | 0.0039 (10) |
O7 | 0.0174 (11) | 0.0155 (13) | 0.0231 (14) | −0.0022 (9) | 0.0010 (10) | −0.0016 (11) |
O12 | 0.0181 (12) | 0.0197 (14) | 0.0275 (14) | −0.0009 (10) | −0.0017 (10) | 0.0055 (11) |
O9 | 0.0284 (13) | 0.0166 (13) | 0.0248 (14) | −0.0026 (10) | 0.0019 (11) | 0.0012 (12) |
O3 | 0.0183 (11) | 0.0105 (12) | 0.0238 (13) | −0.0014 (9) | 0.0068 (9) | −0.0022 (10) |
O1 | 0.0166 (11) | 0.0180 (13) | 0.0160 (12) | 0.0031 (9) | 0.0012 (9) | −0.0009 (10) |
O10 | 0.0270 (13) | 0.0205 (14) | 0.0164 (13) | −0.0053 (10) | −0.0001 (10) | 0.0012 (11) |
O14 | 0.0291 (15) | 0.0187 (14) | 0.0410 (18) | −0.0112 (11) | 0.0052 (12) | −0.0063 (13) |
O11 | 0.0265 (14) | 0.0382 (17) | 0.0175 (14) | −0.0043 (12) | −0.0032 (10) | −0.0024 (13) |
O6 | 0.0203 (12) | 0.0134 (13) | 0.0251 (14) | −0.0014 (9) | −0.0003 (10) | −0.0033 (11) |
O4 | 0.0221 (12) | 0.0227 (14) | 0.0191 (13) | −0.0042 (10) | 0.0007 (10) | 0.0073 (11) |
N1 | 0.0196 (14) | 0.0170 (16) | 0.0195 (16) | 0.0000 (11) | 0.0033 (11) | −0.0010 (13) |
N2 | 0.0178 (14) | 0.0254 (18) | 0.0192 (16) | −0.0023 (12) | 0.0026 (11) | −0.0017 (14) |
O13 | 0.0179 (12) | 0.0166 (13) | 0.0341 (15) | −0.0003 (10) | 0.0016 (10) | 0.0005 (12) |
O8 | 0.0349 (15) | 0.0151 (14) | 0.0336 (16) | 0.0075 (11) | −0.0005 (12) | 0.0065 (12) |
O5 | 0.0235 (13) | 0.0224 (14) | 0.0238 (14) | −0.0037 (10) | 0.0102 (10) | −0.0061 (12) |
N3 | 0.0186 (14) | 0.0140 (15) | 0.0216 (16) | −0.0031 (11) | 0.0045 (11) | 0.0005 (13) |
C5 | 0.0175 (16) | 0.024 (2) | 0.026 (2) | 0.0004 (14) | 0.0094 (14) | 0.0040 (17) |
C3 | 0.0139 (15) | 0.0161 (18) | 0.0167 (17) | 0.0029 (12) | 0.0033 (12) | 0.0012 (14) |
C4 | 0.0222 (17) | 0.0183 (19) | 0.0178 (18) | −0.0003 (14) | 0.0036 (13) | 0.0040 (15) |
C2 | 0.0175 (15) | 0.0160 (18) | 0.0176 (18) | 0.0031 (13) | 0.0066 (13) | 0.0007 (15) |
C1 | 0.0207 (17) | 0.0159 (18) | 0.0215 (19) | 0.0023 (13) | 0.0062 (14) | −0.0031 (15) |
C6 | 0.035 (2) | 0.023 (2) | 0.023 (2) | −0.0038 (16) | 0.0037 (16) | 0.0020 (17) |
Sm1—O1 | 2.416 (2) | O6—N1 | 1.267 (4) |
Sm1—O5 | 2.427 (3) | O4—C4 | 1.429 (4) |
Sm1—O2 | 2.441 (2) | O4—H4 | 0.8400 |
Sm1—O10 | 2.486 (3) | N1—O8 | 1.221 (4) |
Sm1—O6 | 2.507 (2) | O13—N3 | 1.265 (4) |
Sm1—O13 | 2.511 (2) | O5—C5 | 1.459 (4) |
Sm1—O9 | 2.516 (3) | O5—H5 | 0.8400 |
Sm1—O3 | 2.537 (2) | C5—C6 | 1.496 (5) |
Sm1—O12 | 2.547 (3) | C5—H5A | 0.9900 |
Sm1—O7 | 2.611 (2) | C5—H5B | 0.9900 |
O2—C2 | 1.448 (4) | C3—C4 | 1.512 (5) |
O2—H2 | 0.8400 | C3—C2 | 1.516 (5) |
O7—N1 | 1.270 (4) | C3—H3A | 1.0000 |
O12—N3 | 1.280 (4) | C4—H4A | 0.9900 |
O9—N2 | 1.275 (4) | C4—H4B | 0.9900 |
O3—C3 | 1.453 (4) | C2—C1 | 1.512 (5) |
O3—H3 | 0.8400 | C2—H2A | 1.0000 |
O1—C1 | 1.448 (4) | C1—H1A | 0.9900 |
O1—H1 | 0.8400 | C1—H1B | 0.9900 |
O10—N2 | 1.265 (4) | C6—H6A | 0.9800 |
O14—N3 | 1.216 (4) | C6—H6B | 0.9800 |
O11—N2 | 1.227 (4) | C6—H6C | 0.9800 |
O1—Sm1—O5 | 143.28 (8) | C1—O1—H1 | 105.1 |
O1—Sm1—O2 | 67.50 (8) | Sm1—O1—H1 | 121.9 |
O5—Sm1—O2 | 144.50 (8) | N2—O10—Sm1 | 97.0 (2) |
O1—Sm1—O10 | 127.41 (8) | N1—O6—Sm1 | 99.15 (18) |
O5—Sm1—O10 | 77.06 (9) | C4—O4—H4 | 108.2 |
O2—Sm1—O10 | 67.52 (8) | O8—N1—O6 | 121.3 (3) |
O1—Sm1—O6 | 71.93 (8) | O8—N1—O7 | 121.8 (3) |
O5—Sm1—O6 | 81.04 (9) | O6—N1—O7 | 116.8 (3) |
O2—Sm1—O6 | 134.38 (8) | O11—N2—O10 | 121.1 (3) |
O10—Sm1—O6 | 158.09 (9) | O11—N2—O9 | 122.4 (3) |
O1—Sm1—O13 | 72.42 (9) | O10—N2—O9 | 116.5 (3) |
O5—Sm1—O13 | 74.36 (9) | N3—O13—Sm1 | 97.69 (18) |
O2—Sm1—O13 | 117.19 (8) | C5—O5—Sm1 | 137.0 (2) |
O10—Sm1—O13 | 106.37 (9) | C5—O5—H5 | 105.5 |
O6—Sm1—O13 | 66.94 (8) | Sm1—O5—H5 | 115.6 |
O1—Sm1—O9 | 142.39 (8) | O14—N3—O13 | 122.5 (3) |
O5—Sm1—O9 | 73.49 (9) | O14—N3—O12 | 121.7 (3) |
O2—Sm1—O9 | 82.37 (8) | O13—N3—O12 | 115.8 (3) |
O10—Sm1—O9 | 51.15 (8) | O5—C5—C6 | 110.4 (3) |
O6—Sm1—O9 | 121.97 (8) | O5—C5—H5A | 109.6 |
O13—Sm1—O9 | 144.30 (9) | C6—C5—H5A | 109.6 |
O1—Sm1—O3 | 67.40 (8) | O5—C5—H5B | 109.6 |
O5—Sm1—O3 | 133.87 (8) | C6—C5—H5B | 109.6 |
O2—Sm1—O3 | 63.15 (8) | H5A—C5—H5B | 108.1 |
O10—Sm1—O3 | 112.83 (8) | O3—C3—C4 | 111.6 (3) |
O6—Sm1—O3 | 82.77 (8) | O3—C3—C2 | 107.5 (3) |
O13—Sm1—O3 | 135.47 (8) | C4—C3—C2 | 112.6 (3) |
O9—Sm1—O3 | 79.34 (8) | O3—C3—H3A | 108.3 |
O1—Sm1—O12 | 75.47 (8) | C4—C3—H3A | 108.3 |
O5—Sm1—O12 | 95.05 (9) | C2—C3—H3A | 108.3 |
O2—Sm1—O12 | 73.59 (8) | O4—C4—C3 | 111.5 (3) |
O10—Sm1—O12 | 66.89 (8) | O4—C4—H4A | 109.3 |
O6—Sm1—O12 | 115.38 (8) | C3—C4—H4A | 109.3 |
O13—Sm1—O12 | 50.47 (8) | O4—C4—H4B | 109.3 |
O9—Sm1—O12 | 118.03 (8) | C3—C4—H4B | 109.3 |
O3—Sm1—O12 | 130.81 (8) | H4A—C4—H4B | 108.0 |
O1—Sm1—O7 | 106.52 (8) | O2—C2—C1 | 107.5 (3) |
O5—Sm1—O7 | 71.60 (8) | O2—C2—C3 | 104.0 (3) |
O2—Sm1—O7 | 125.41 (8) | C1—C2—C3 | 116.7 (3) |
O10—Sm1—O7 | 121.23 (8) | O2—C2—H2A | 109.5 |
O6—Sm1—O7 | 49.91 (8) | C1—C2—H2A | 109.5 |
O13—Sm1—O7 | 111.01 (8) | C3—C2—H2A | 109.5 |
O9—Sm1—O7 | 72.58 (8) | O1—C1—C2 | 109.1 (3) |
O3—Sm1—O7 | 64.96 (8) | O1—C1—H1A | 109.9 |
O12—Sm1—O7 | 160.58 (8) | C2—C1—H1A | 109.9 |
C2—O2—Sm1 | 110.65 (18) | O1—C1—H1B | 109.9 |
C2—O2—H2 | 103.5 | C2—C1—H1B | 109.9 |
Sm1—O2—H2 | 122.5 | H1A—C1—H1B | 108.3 |
N1—O7—Sm1 | 94.10 (18) | C5—C6—H6A | 109.5 |
N3—O12—Sm1 | 95.50 (19) | C5—C6—H6B | 109.5 |
N2—O9—Sm1 | 95.30 (19) | H6A—C6—H6B | 109.5 |
C3—O3—Sm1 | 118.28 (18) | C5—C6—H6C | 109.5 |
C3—O3—H3 | 108.5 | H6A—C6—H6C | 109.5 |
Sm1—O3—H3 | 121.2 | H6B—C6—H6C | 109.5 |
C1—O1—Sm1 | 118.48 (19) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O4i | 0.84 | 1.83 | 2.668 (3) | 175 |
O2—H2···O7ii | 0.84 | 1.96 | 2.802 (3) | 174 |
O2—H2···O8ii | 0.84 | 2.54 | 3.146 (4) | 130 |
O3—H3···O12iii | 0.84 | 2.07 | 2.903 (3) | 174 |
O4—H4···O8iv | 0.84 | 2.09 | 2.910 (4) | 165 |
O4—H4···O6iv | 0.84 | 2.55 | 3.235 (3) | 140 |
O5—H5···O11v | 0.84 | 2.00 | 2.827 (4) | 167 |
Symmetry codes: (i) −x, −y, −z+1; (ii) −x, y+1/2, −z+1/2; (iii) −x, y−1/2, −z+1/2; (iv) x−1, y, z; (v) −x, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | [Sm(NO3)3(C2H6O)(C4H10O4)] |
Mr | 504.57 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 173 |
a, b, c (Å) | 7.8537 (16), 12.875 (3), 15.252 (3) |
β (°) | 100.92 (3) |
V (Å3) | 1514.4 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.96 |
Crystal size (mm) | 0.27 × 0.21 × 0.16 |
Data collection | |
Diffractometer | Rigaku Saturn724+ CCD diffractometer |
Absorption correction | Multi-scan (CrystalClear; Rigaku, 2007) |
Tmin, Tmax | 0.488, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10349, 3446, 3315 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.029, 0.057, 1.22 |
No. of reflections | 3446 |
No. of parameters | 218 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.33, −0.72 |
Computer programs: CrystalClear (Rigaku, 2007), XP in SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O4i | 0.84 | 1.83 | 2.668 (3) | 174.6 |
O2—H2···O7ii | 0.84 | 1.96 | 2.802 (3) | 174.3 |
O2—H2···O8ii | 0.84 | 2.54 | 3.146 (4) | 129.7 |
O3—H3···O12iii | 0.84 | 2.07 | 2.903 (3) | 174.1 |
O4—H4···O8iv | 0.84 | 2.09 | 2.910 (4) | 165.2 |
O4—H4···O6iv | 0.84 | 2.55 | 3.235 (3) | 140.0 |
O5—H5···O11v | 0.84 | 2.00 | 2.827 (4) | 166.8 |
Symmetry codes: (i) −x, −y, −z+1; (ii) −x, y+1/2, −z+1/2; (iii) −x, y−1/2, −z+1/2; (iv) x−1, y, z; (v) −x, −y, −z. |
Acknowledgements
This work was supported financially by the National Natural Science Foundation of China (grants Nos. 50973003 and 21001009) and the National High-Tech R&D Program of China (863 Program) of MOST (No. 2010 A A03A406). Special thanks to Drs Hao, Wang and Liang for their assistance with the data collection.
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Metal ions play important roles in the catalysis of numerous chemical and biological reactions. Interactions between carbohydrates (sugars) and metal ions may be involved in many biochemical processes (Gottschaldt & Schubert, 2009). Here the sugar alcohol erythritol was chosen as a model compound to study the coordination behavior of hydroxyl groups to f-block metal ions.
The molecular structure of the title complex, [Sm(C4H10O4)(C2H5OH)(NO3)3], denoted as SmEN, where E stands for erythritol, N stands for nitrate, is shown in Fig. 1. In the title compound the SmIII cation is 10-fold coordinated by three hydroxyl groups (O1, O2 and O3) from one erythritol molecule, by one hydroxyl group from ethanol (O5), and by three bidentate nitrate ions through O6, O7; O9, O10; O12, O13. The structure of SmEN is isotypic with its Nd, Eu, Y, Gd, Tb (Yang et al., 2003, 2004, 2012) and Ho (Hua et al., 2013) analogues. The Sm—O distances range from 2.416 (2) to 2.611 (2) Å, the average Sm—O distance being 2.499 Å. The C—C—C and the O—C–C bond angles of the central backbone in the free centrosymmetric erythritol molecule are 113° and 107°, respectively (Bekoe & Powell, 1959). After coordination, the C—C—C bond angles are 112.6 (3) and 116.7 (3)° and the O—C—C bond angles range from 104.0 (3) to 111.6 (3)° in SmEN, which indicates a subtle change of the conformation of erythritol.
The extensive hydrogen bond network in SmEN is formed by O—H···O hydrogen bonds from coordinating and uncoordinating hydroxyl groups of erythritol and ethanol and the nitrate O atoms. The coordinating hydroxyl groups O1 of erythritol forms a hydrogen bond with the uncoordinating O4 hydroxyl group of a neighbouring erythritol molecule. The coordinating O2 hydroxyl group forms a bifurcated hydrogen bonds with two oxygen atoms from a nitrate ion (O7, O8). The coordinating hydroxyl group O3 forms a hydrogen bond with an oxygen atom from another nitrate ion (O12). The non-coordinating hydroxyl group O4 is a donor of a bifurcated hydrogen bond to O8 and O6 from one nitrate ion. The ethanol hydroxy group (O5) forms a hydrogen bond with an oxygen atom from a nitrate ion (O11). Details of the hydrogen bonding are given in Table 1 and Fig. 2.