metal-organic compounds
Redetermination of diaquatris(4-oxopent-2-en-2-olato-κ2O,O′)lanthanum(III)
aDepartment of Materials Science and Chemical Engineering, Kitakyushu National College of Technology, Shi-i 5-20-1, Kokuraminami-ku, Kitakyushu, Fukuoka 802-0985, Japan
*Correspondence e-mail: okawara@kct.ac.jp
The structure of the title compound, [La(C5H7O2)3(H2O)2], has been redetermined to modern standards with anisotropic displacement parameters for all non-H atoms and the hydrogen-bonding pattern unambiguously established [for the previous study, see Phillips et al. (1968). Inorg. Chem. 7, 2295–2299]. The La3+ ion is coordinated by three O,O′-bidentate acetylacetate (acac−) ligands and two water molecules, resulting in a fairly regular square-antiprismatic LaO8 coordination geometry, with both aqua ligands part of the same square face. In the crystal, the neutral complex molecules are linked into [110] chains by O—H⋯O hydrogen bonds.
CCDC reference: 1007160
Related literature
For the previous report on the title compound, see: Phillips et al. (1968). For related tris(acetylacetonato)lanthanide complexes, see: Watkins et al. (1969); Kooijman et al. (2000). For other lanthanide complexes, see: Richardson et al. (1968); Lama et al. (2007).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
CCDC reference: 1007160
https://doi.org/10.1107/S1600536814013336/hb7216sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536814013336/hb7216Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536814013336/hb7216Isup3.cdx
An water suspension (10 ml) of acetylacetone (161.9 mg, 1.62 mmol) and LaCl3.7H2 O (200.0 mg, 0.54 mmol) were stirred under room temperature. Quantitative amount of NaOH (64.7 mg, 1.62 mmol) was added to the suspension. A white precipitate was immediately generated. The precipitate was filtered and recrystallized from CH2Cl2 and methanol in the presence of small amount of water (ca. 3%). Colorless blocks of the title compound were obtained in a few days and mounted on a glass capillary. Yield: 77.9 mg, (31%). Analysis: calculated for C15H25LaO8 ([La(acac)3(H2O)2]): C 38.15, H 5.34%; found: C 37.80, H 5.16%. ESI-TOF-MS (CH3OH): m/z 336.97 (calcd: 337.00 for [M–acac–2H2O]+).
H atoms except two aqua ligands were placed in geometrically idealized positions and constrained to ride on their parent atoms with Uiso(H) = 1.2Ueq(C—H).
H atoms attached to O7 (H1W and H2W) and O8 (H3W and H4W) were found in a difference Fourier map. Any restraints were not needed for a stable
All hydrogen atoms were included in the calculation.Lanthanum (La) is the first element of the lanthanide in the periodic table. Although La does not show any luminescent properties, it has worth investigating as referece complexs of other luminescent lanthanide analogs. Because structural features of LaIII complexes are similar to those of other lanthanide cases, they can be structurally characterized by nuclear magnetic resonance spectroscopy. LaIII acetylacetonate complexes are used as a precursor of further functionalized complexes. Herein we redetermined the molecular structure of La(acac)3(H2O)2 (compound I) which has been firstly reported by Phillips et al. (1968). In the previous study, all of the oxygen and carbon atoms have been refined isotropically. We have successfully obtained the reliable anisotropic displacement parameters for all non-hydrogen atoms. The molecular geometry of the compound I was almost identical to previous report. The LaIII is ligated from three acetylacetonate ligands and two aqua ligands which are forming 8-coordinate structure around LaIII (Figure 1). The average distance of oxygen atoms of acetylacetonate (O1—O6) and LaIII is 2.489 (30) Å while the original structure showed the average distance of 2.473 (24) Å. The two aqua ligands also align at parpendicular position each other in which O7—La1—O8 angle of 75.20 (5)o. Similar coordination structures are seen in HoIII(acac)3(H2O)2 by Kooijman et al. (2000) and YbIII(acac)3(H2O) by Watkins et al. (1969). Both complexes have three acac ligands and the former one has nearly identical structure in which two aqua ligands ligate to the central ion and complete 8-coordinated square antiprismatic structure. The longest bond lengths between the central lanthanide ion and the oxygen atoms of acac ligands were observed for the compound I due to difference in their ionic radii. The compound I in the crystal are connected by four hydrogen bonding, O7—O1i (symmetry codes: (i) 2 - x, 2 - y, 1 - z), O7—O3i, O8—O4ii (symmetry codes: (ii) 1 - x, 1 - y, 1 - z) and O8—O6ii, which are forming a one dimensional hydrogen bonding network (Figure 2) propagating in the [110] direction.
For the previous report on the title compound, see: Phillips et al. (1968). For related tris(acetylacetonato)lanthanide complexes, see: Watkins et al. (1969); Kooijman et al. (2000). For other lanthanide complexes, see: Richardson et al. (1968); Lama et al. (2007).
Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. An ORTEP view of the title compound, with displacement ellipsoids drawn at the 50% probability level. | |
Fig. 2. Part of a [110] hydrogen-bonded chain in the title compound. The blue broken lines show the hydrogen bonds. Symmetry codes: (i) 2 - x, 2 - y, 1 - z, (ii) x, y, z, (iii) 1 - x, 1 - y, 1 - z, (iv) x - 1, y - 1, z). |
[La(C5H7O2)3(H2O)2] | Z = 2 |
Mr = 472.26 | F(000) = 472 |
Triclinic, P1 | Dx = 1.657 Mg m−3 |
a = 8.9245 (12) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 10.6597 (15) Å | Cell parameters from 9940 reflections |
c = 11.3727 (15) Å | θ = 2.5–30.5° |
α = 96.614 (2)° | µ = 2.29 mm−1 |
β = 100.601 (2)° | T = 100 K |
γ = 114.325 (2)° | Block, colourless |
V = 946.8 (2) Å3 | 0.50 × 0.50 × 0.22 mm |
Bruker APEXII CCD diffractometer | 5213 independent reflections |
Radiation source: fine focus sealed tube | 5068 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.030 |
Detector resolution: 8.3333 pixels mm-1 | θmax = 29.6°, θmin = 1.9° |
phi and ω scans | h = −12→12 |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | k = −14→14 |
Tmin = 0.40, Tmax = 0.63 | l = −15→15 |
13810 measured reflections |
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)] = 0.022 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.058 | w = 1/[σ2(Fo2) + (0.0344P)2 + 0.2713P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.003 |
5213 reflections | Δρmax = 1.04 e Å−3 |
240 parameters | Δρmin = −1.41 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008) |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0149 (8) |
[La(C5H7O2)3(H2O)2] | γ = 114.325 (2)° |
Mr = 472.26 | V = 946.8 (2) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.9245 (12) Å | Mo Kα radiation |
b = 10.6597 (15) Å | µ = 2.29 mm−1 |
c = 11.3727 (15) Å | T = 100 K |
α = 96.614 (2)° | 0.50 × 0.50 × 0.22 mm |
β = 100.601 (2)° |
Bruker APEXII CCD diffractometer | 5213 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 5068 reflections with I > 2σ(I) |
Tmin = 0.40, Tmax = 0.63 | Rint = 0.030 |
13810 measured reflections |
R[F2 > 2σ(F2)] = 0.022 | 0 restraints |
wR(F2) = 0.058 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 1.04 e Å−3 |
5213 reflections | Δρmin = −1.41 e Å−3 |
240 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 | ||
La1 | 0.770906 (10) | 0.782106 (9) | 0.614919 (8) | 0.01085 (5) | |
O7 | 1.00237 (17) | 0.85834 (14) | 0.50120 (13) | 0.0153 (2) | |
O6 | 0.67267 (17) | 0.56182 (14) | 0.69763 (12) | 0.0162 (2) | |
O4 | 0.45916 (16) | 0.69885 (14) | 0.55190 (12) | 0.0159 (2) | |
O1 | 0.95280 (17) | 1.03835 (14) | 0.70708 (12) | 0.0180 (3) | |
O2 | 0.72212 (18) | 0.84749 (15) | 0.81177 (13) | 0.0209 (3) | |
O3 | 0.68870 (16) | 0.90080 (14) | 0.45213 (12) | 0.0161 (2) | |
O8 | 0.66186 (18) | 0.58124 (15) | 0.42448 (13) | 0.0170 (3) | |
C3 | 0.9035 (3) | 1.0876 (2) | 0.90089 (18) | 0.0193 (4) | |
H3 | 0.9367 | 1.1593 | 0.9716 | 0.023* | |
C2 | 0.9814 (2) | 1.1236 (2) | 0.80637 (17) | 0.0170 (3) | |
C4 | 0.7789 (2) | 0.9524 (2) | 0.89890 (17) | 0.0175 (3) | |
C5 | 0.7027 (3) | 0.9307 (2) | 1.00763 (19) | 0.0239 (4) | |
H5A | 0.6022 | 0.9485 | 0.9939 | 0.036* | |
H5B | 0.7869 | 0.9961 | 1.0817 | 0.036* | |
H5C | 0.6697 | 0.8336 | 1.0177 | 0.036* | |
C1 | 1.1092 (3) | 1.2747 (2) | 0.8198 (2) | 0.0281 (4) | |
H1A | 1.2086 | 1.2767 | 0.7937 | 0.042* | |
H1B | 1.1445 | 1.3239 | 0.9057 | 0.042* | |
H1C | 1.0571 | 1.3216 | 0.7688 | 0.042* | |
C9 | 0.3503 (2) | 0.71969 (18) | 0.47772 (17) | 0.0142 (3) | |
C7 | 0.5536 (2) | 0.89906 (19) | 0.39080 (17) | 0.0146 (3) | |
C10 | 0.1669 (2) | 0.6312 (2) | 0.47366 (19) | 0.0188 (4) | |
H10A | 0.1324 | 0.5336 | 0.4336 | 0.028* | |
H10B | 0.0959 | 0.6679 | 0.4275 | 0.028* | |
H10C | 0.1529 | 0.6344 | 0.5573 | 0.028* | |
C8 | 0.3893 (2) | 0.8151 (2) | 0.40103 (18) | 0.0174 (3) | |
H8 | 0.2974 | 0.824 | 0.3518 | 0.021* | |
C6 | 0.5706 (2) | 0.9907 (2) | 0.29805 (18) | 0.0198 (4) | |
H6A | 0.6826 | 1.0725 | 0.3242 | 0.03* | |
H6B | 0.4817 | 1.0229 | 0.2913 | 0.03* | |
H6C | 0.5586 | 0.9366 | 0.2183 | 0.03* | |
O5 | 1.01440 (17) | 0.74506 (15) | 0.72219 (13) | 0.0189 (3) | |
C14 | 0.7368 (3) | 0.5254 (2) | 0.78893 (17) | 0.0179 (4) | |
C12 | 1.0387 (3) | 0.6712 (2) | 0.79565 (17) | 0.0183 (3) | |
C13 | 0.9103 (3) | 0.5708 (2) | 0.83696 (18) | 0.0209 (4) | |
H13 | 0.9441 | 0.5314 | 0.9017 | 0.025* | |
C15 | 0.6127 (3) | 0.4243 (3) | 0.8472 (2) | 0.0299 (5) | |
H15A | 0.5659 | 0.4746 | 0.8951 | 0.045* | |
H15B | 0.6714 | 0.3842 | 0.9011 | 0.045* | |
H15C | 0.52 | 0.3484 | 0.7831 | 0.045* | |
C11 | 1.2197 (3) | 0.6933 (3) | 0.8430 (2) | 0.0279 (4) | |
H11A | 1.2719 | 0.6932 | 0.7743 | 0.042* | |
H11B | 1.2194 | 0.6171 | 0.8838 | 0.042* | |
H11C | 1.285 | 0.7839 | 0.9014 | 0.042* | |
H2W | 0.985 (4) | 0.867 (3) | 0.435 (3) | 0.035 (8)* | |
H1W | 1.104 (4) | 0.932 (3) | 0.536 (3) | 0.034 (8)* | |
H4W | 0.659 (4) | 0.514 (3) | 0.441 (3) | 0.027 (7)* | |
H3W | 0.569 (4) | 0.561 (3) | 0.381 (3) | 0.040 (9)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
La1 | 0.01059 (7) | 0.00983 (7) | 0.01199 (7) | 0.00403 (4) | 0.00295 (4) | 0.00369 (4) |
O7 | 0.0140 (6) | 0.0156 (6) | 0.0167 (6) | 0.0058 (5) | 0.0048 (5) | 0.0062 (5) |
O6 | 0.0164 (6) | 0.0141 (6) | 0.0163 (6) | 0.0052 (5) | 0.0030 (5) | 0.0052 (5) |
O4 | 0.0127 (6) | 0.0154 (6) | 0.0204 (6) | 0.0062 (5) | 0.0046 (5) | 0.0061 (5) |
O1 | 0.0221 (7) | 0.0138 (6) | 0.0152 (6) | 0.0051 (5) | 0.0057 (5) | 0.0021 (5) |
O2 | 0.0226 (7) | 0.0193 (7) | 0.0175 (6) | 0.0055 (6) | 0.0082 (5) | 0.0020 (5) |
O3 | 0.0127 (6) | 0.0168 (6) | 0.0198 (6) | 0.0068 (5) | 0.0037 (5) | 0.0077 (5) |
O8 | 0.0178 (7) | 0.0128 (6) | 0.0177 (6) | 0.0047 (5) | 0.0035 (5) | 0.0029 (5) |
C3 | 0.0209 (9) | 0.0185 (9) | 0.0148 (8) | 0.0068 (7) | 0.0036 (7) | −0.0013 (7) |
C2 | 0.0174 (8) | 0.0154 (8) | 0.0159 (8) | 0.0065 (7) | 0.0016 (7) | 0.0022 (6) |
C4 | 0.0173 (8) | 0.0237 (9) | 0.0145 (8) | 0.0114 (8) | 0.0046 (7) | 0.0047 (7) |
C5 | 0.0226 (10) | 0.0329 (11) | 0.0169 (9) | 0.0120 (9) | 0.0081 (8) | 0.0041 (8) |
C1 | 0.0319 (11) | 0.0154 (9) | 0.0251 (10) | 0.0010 (8) | 0.0047 (9) | 0.0015 (8) |
C9 | 0.0124 (7) | 0.0128 (7) | 0.0180 (8) | 0.0061 (6) | 0.0052 (6) | 0.0014 (6) |
C7 | 0.0156 (8) | 0.0129 (8) | 0.0160 (8) | 0.0074 (7) | 0.0031 (6) | 0.0033 (6) |
C10 | 0.0128 (8) | 0.0176 (8) | 0.0265 (10) | 0.0065 (7) | 0.0069 (7) | 0.0050 (7) |
C8 | 0.0120 (8) | 0.0185 (8) | 0.0220 (9) | 0.0071 (7) | 0.0028 (7) | 0.0066 (7) |
C6 | 0.0192 (9) | 0.0215 (9) | 0.0211 (9) | 0.0094 (7) | 0.0055 (7) | 0.0107 (7) |
O5 | 0.0165 (6) | 0.0195 (6) | 0.0222 (7) | 0.0084 (5) | 0.0035 (5) | 0.0107 (5) |
C14 | 0.0239 (9) | 0.0164 (8) | 0.0130 (8) | 0.0075 (7) | 0.0059 (7) | 0.0051 (7) |
C12 | 0.0194 (9) | 0.0184 (8) | 0.0152 (8) | 0.0087 (7) | −0.0011 (7) | 0.0037 (7) |
C13 | 0.0226 (9) | 0.0220 (9) | 0.0152 (8) | 0.0081 (8) | −0.0005 (7) | 0.0088 (7) |
C15 | 0.0289 (11) | 0.0321 (12) | 0.0229 (10) | 0.0052 (9) | 0.0078 (9) | 0.0146 (9) |
C11 | 0.0203 (10) | 0.0310 (11) | 0.0335 (12) | 0.0130 (9) | 0.0002 (8) | 0.0151 (9) |
La1—O2 | 2.4365 (14) | C1—H1B | 0.98 |
La1—O4 | 2.4754 (13) | C1—H1C | 0.98 |
La1—O5 | 2.4917 (14) | C9—C8 | 1.393 (3) |
La1—O1 | 2.5013 (14) | C9—C10 | 1.504 (2) |
La1—O6 | 2.5067 (13) | C7—C8 | 1.404 (2) |
La1—O3 | 2.5241 (13) | C7—C6 | 1.505 (3) |
La1—O7 | 2.5381 (13) | C10—H10A | 0.98 |
La1—O8 | 2.5811 (14) | C10—H10B | 0.98 |
O7—H2W | 0.76 (3) | C10—H10C | 0.98 |
O7—H1W | 0.90 (3) | C8—H8 | 0.95 |
O6—C14 | 1.270 (2) | C6—H6A | 0.98 |
O4—C9 | 1.274 (2) | C6—H6B | 0.98 |
O1—C2 | 1.278 (2) | C6—H6C | 0.98 |
O2—C4 | 1.258 (2) | O5—C12 | 1.261 (2) |
O3—C7 | 1.269 (2) | C14—C13 | 1.393 (3) |
O8—H4W | 0.75 (3) | C14—C15 | 1.509 (3) |
O8—H3W | 0.81 (4) | C12—C13 | 1.408 (3) |
C3—C2 | 1.392 (3) | C12—C11 | 1.514 (3) |
C3—C4 | 1.406 (3) | C13—H13 | 0.95 |
C3—H3 | 0.95 | C15—H15A | 0.98 |
C2—C1 | 1.511 (3) | C15—H15B | 0.98 |
C4—C5 | 1.513 (3) | C15—H15C | 0.98 |
C5—H5A | 0.98 | C11—H11A | 0.98 |
C5—H5B | 0.98 | C11—H11B | 0.98 |
C5—H5C | 0.98 | C11—H11C | 0.98 |
C1—H1A | 0.98 | ||
O2—La1—O4 | 80.43 (5) | H5A—C5—H5C | 109.5 |
O2—La1—O5 | 89.79 (5) | H5B—C5—H5C | 109.5 |
O4—La1—O5 | 147.90 (4) | C2—C1—H1A | 109.5 |
O2—La1—O1 | 68.90 (5) | C2—C1—H1B | 109.5 |
O4—La1—O1 | 117.77 (4) | H1A—C1—H1B | 109.5 |
O5—La1—O1 | 86.07 (5) | C2—C1—H1C | 109.5 |
O2—La1—O6 | 74.35 (5) | H1A—C1—H1C | 109.5 |
O4—La1—O6 | 79.74 (4) | H1B—C1—H1C | 109.5 |
O5—La1—O6 | 68.17 (4) | O4—C9—C8 | 125.02 (16) |
O1—La1—O6 | 134.81 (4) | O4—C9—C10 | 115.96 (16) |
O2—La1—O3 | 114.29 (5) | C8—C9—C10 | 119.01 (16) |
O4—La1—O3 | 68.42 (4) | O3—C7—C8 | 124.70 (17) |
O5—La1—O3 | 142.08 (4) | O3—C7—C6 | 117.55 (16) |
O1—La1—O3 | 76.92 (4) | C8—C7—C6 | 117.74 (16) |
O6—La1—O3 | 144.19 (4) | C9—C10—H10A | 109.5 |
O2—La1—O7 | 139.98 (5) | C9—C10—H10B | 109.5 |
O4—La1—O7 | 133.31 (5) | H10A—C10—H10B | 109.5 |
O5—La1—O7 | 70.81 (5) | C9—C10—H10C | 109.5 |
O1—La1—O7 | 74.97 (4) | H10A—C10—H10C | 109.5 |
O6—La1—O7 | 124.99 (4) | H10B—C10—H10C | 109.5 |
O3—La1—O7 | 72.12 (4) | C9—C8—C7 | 125.12 (17) |
O2—La1—O8 | 143.70 (5) | C9—C8—H8 | 117.4 |
O4—La1—O8 | 74.43 (5) | C7—C8—H8 | 117.4 |
O5—La1—O8 | 97.74 (5) | C7—C6—H6A | 109.5 |
O1—La1—O8 | 146.72 (4) | C7—C6—H6B | 109.5 |
O6—La1—O8 | 75.73 (5) | H6A—C6—H6B | 109.5 |
O3—La1—O8 | 80.19 (5) | C7—C6—H6C | 109.5 |
O7—La1—O8 | 75.20 (5) | H6A—C6—H6C | 109.5 |
La1—O7—H2W | 122 (2) | H6B—C6—H6C | 109.5 |
La1—O7—H1W | 120.9 (19) | C12—O5—La1 | 137.23 (13) |
H2W—O7—H1W | 103 (3) | O6—C14—C13 | 124.89 (18) |
C14—O6—La1 | 133.49 (12) | O6—C14—C15 | 116.30 (19) |
C9—O4—La1 | 139.02 (12) | C13—C14—C15 | 118.80 (18) |
C2—O1—La1 | 136.92 (12) | O5—C12—C13 | 124.82 (18) |
C4—O2—La1 | 139.63 (13) | O5—C12—C11 | 117.21 (18) |
C7—O3—La1 | 137.69 (12) | C13—C12—C11 | 117.97 (17) |
La1—O8—H4W | 112 (2) | C14—C13—C12 | 124.17 (17) |
La1—O8—H3W | 117 (2) | C14—C13—H13 | 117.9 |
H4W—O8—H3W | 106 (3) | C12—C13—H13 | 117.9 |
C2—C3—C4 | 124.49 (18) | C14—C15—H15A | 109.5 |
C2—C3—H3 | 117.8 | C14—C15—H15B | 109.5 |
C4—C3—H3 | 117.8 | H15A—C15—H15B | 109.5 |
O1—C2—C3 | 124.97 (18) | C14—C15—H15C | 109.5 |
O1—C2—C1 | 116.52 (17) | H15A—C15—H15C | 109.5 |
C3—C2—C1 | 118.51 (18) | H15B—C15—H15C | 109.5 |
O2—C4—C3 | 124.92 (18) | C12—C11—H11A | 109.5 |
O2—C4—C5 | 116.86 (18) | C12—C11—H11B | 109.5 |
C3—C4—C5 | 118.19 (18) | H11A—C11—H11B | 109.5 |
C4—C5—H5A | 109.5 | C12—C11—H11C | 109.5 |
C4—C5—H5B | 109.5 | H11A—C11—H11C | 109.5 |
H5A—C5—H5B | 109.5 | H11B—C11—H11C | 109.5 |
C4—C5—H5C | 109.5 |
D—H···A | D—H | H···A | D···A | D—H···A |
O7—H2W···O1i | 0.76 (3) | 2.05 (3) | 2.7514 (19) | 153 (3) |
O7—H1W···O3i | 0.90 (3) | 1.94 (3) | 2.7912 (19) | 158 (3) |
O8—H4W···O4ii | 0.75 (3) | 2.09 (3) | 2.7907 (19) | 155 (3) |
O8—H3W···O6ii | 0.81 (4) | 1.96 (4) | 2.721 (2) | 155 (3) |
Symmetry codes: (i) −x+2, −y+2, −z+1; (ii) −x+1, −y+1, −z+1. |
La1—O2 | 2.4365 (14) | La1—O6 | 2.5067 (13) |
La1—O4 | 2.4754 (13) | La1—O3 | 2.5241 (13) |
La1—O5 | 2.4917 (14) | La1—O7 | 2.5381 (13) |
La1—O1 | 2.5013 (14) | La1—O8 | 2.5811 (14) |
D—H···A | D—H | H···A | D···A | D—H···A |
O7—H2W···O1i | 0.76 (3) | 2.05 (3) | 2.7514 (19) | 153.(3) |
O7—H1W···O3i | 0.90 (3) | 1.94 (3) | 2.7912 (19) | 158.(3) |
O8—H4W···O4ii | 0.75 (3) | 2.09 (3) | 2.7907 (19) | 155.(3) |
O8—H3W···O6ii | 0.81 (4) | 1.96 (4) | 2.721 (2) | 155.(3) |
Symmetry codes: (i) −x+2, −y+2, −z+1; (ii) −x+1, −y+1, −z+1. |
Acknowledgements
This work was supported by Nanotechnology Platform Project (Kyushu University Molecule and Material Synthesis Platform) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
References
Bruker (2008). SADABS, SAINT and APEX2. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849–854. Web of Science CrossRef CAS IUCr Journals Google Scholar
Kooijman, H., Nijsen, F., Spek, A. L. & Schip, F. van het (2000). Acta Cryst. C56, 156–158. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Lama, M., Mamula, O., Kottas, G. S., Rizzo, F., De Cola, L., Nakamura, A., Kuroda, R. & Stoeckli-Evans, H. (2007). Chem. Eur. J. 13, 7358–7373. Web of Science CSD CrossRef PubMed CAS Google Scholar
Phillips, T., Sands, D. E. & Wagner, W. F. (1968). Inorg. Chem. 7, 2295–2299. CSD CrossRef CAS Web of Science Google Scholar
Richardson, M. F., Wagner, W. F. & Sands, D. E. (1968). J. Inorg. Nucl. Chem. 30, 1275–1289. CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Watkins, E. D., Cunningham, J. A., Phillips, T., Sands, D. E. & Wagner, W. F. (1969). Inorg. Chem. 8, 29–33. CSD CrossRef CAS Web of Science Google Scholar
Westrip, S. P. (2010). J. Appl. Cryst. 43, 920–925. Web of Science CrossRef CAS IUCr Journals Google Scholar
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Lanthanum (La) is the first element of the lanthanide in the periodic table. Although La does not show any luminescent properties, it has worth investigating as referece complexs of other luminescent lanthanide analogs. Because structural features of LaIII complexes are similar to those of other lanthanide cases, they can be structurally characterized by nuclear magnetic resonance spectroscopy. LaIII acetylacetonate complexes are used as a precursor of further functionalized complexes. Herein we redetermined the molecular structure of La(acac)3(H2O)2 (compound I) which has been firstly reported by Phillips et al. (1968). In the previous study, all of the oxygen and carbon atoms have been refined isotropically. We have successfully obtained the reliable anisotropic displacement parameters for all non-hydrogen atoms. The molecular geometry of the compound I was almost identical to previous report. The LaIII is ligated from three acetylacetonate ligands and two aqua ligands which are forming 8-coordinate structure around LaIII (Figure 1). The average distance of oxygen atoms of acetylacetonate (O1—O6) and LaIII is 2.489 (30) Å while the original structure showed the average distance of 2.473 (24) Å. The two aqua ligands also align at parpendicular position each other in which O7—La1—O8 angle of 75.20 (5)o. Similar coordination structures are seen in HoIII(acac)3(H2O)2 by Kooijman et al. (2000) and YbIII(acac)3(H2O) by Watkins et al. (1969). Both complexes have three acac ligands and the former one has nearly identical structure in which two aqua ligands ligate to the central ion and complete 8-coordinated square antiprismatic structure. The longest bond lengths between the central lanthanide ion and the oxygen atoms of acac ligands were observed for the compound I due to difference in their ionic radii. The compound I in the crystal are connected by four hydrogen bonding, O7—O1i (symmetry codes: (i) 2 - x, 2 - y, 1 - z), O7—O3i, O8—O4ii (symmetry codes: (ii) 1 - x, 1 - y, 1 - z) and O8—O6ii, which are forming a one dimensional hydrogen bonding network (Figure 2) propagating in the [110] direction.