Lanthanum acetylacetonate

Last updated
Lanthanum acetylacetonate
La(acac)3(H2O)2.svg
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 238-187-8
PubChem CID
  • InChI=1S/3C5H7O2.La/c3*1-4(6)3-5(2)7;/h3*3H,1-2H3;/q3*-1;+3
    Key: UUYNRMJIFVOQCR-UHFFFAOYSA-N
  • CC(=O)[CH-]C(=O)C.CC(=O)[CH-]C(=O)C.CC(=O)[CH-]C(=O)C.[La+3]
Properties
C15H21LaO6
Molar mass 436.232 g·mol−1
Hazards
GHS labelling: [1]
GHS-pictogram-exclam.svg
Warning
H315, H319, H335
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Lanthanum acetylacetonate refers to the coordination complex with the formula La(C5H7O2)3. This anhydrous acetylacetonate complex has not been characterized well, but the dihydrate La(C5H7O2)3(H2O)2 has been characterized by X-ray crystallography. [2] [3]

Upon heating under vacuum, the dihydrate converts to the oxo-cluster La4O(C5H7O2)10. This behavior is also observed for erbium, yttrium, gadolinium, and europium. [4]

The instability constants (logYn) are 3.65, 5.13 and 6.12 (corresponding to n=1, 2, 3) have been reported for "La(acac)3". [5] It can be prepared by the reaction of lanthanum alkoxide and acetylacetone. [6] Its tetrahydrate decomposes into monohydrate at 110 °C, obtains the anhydrous form at 150 °C, undergoes La(CH3COO)(acac)2 and La(CH3COO)2(acac), and at 180~285 °C lanthanum acetate is produced. [7] It can be used to prepare NaLaS2, La2Zr2O7 and other materials. [8] [9]

References

  1. ↑ "Lanthanum(3+);pentane-2,4-dione". pubchem.ncbi.nlm.nih.gov.
  2. ↑ Okawara, Toru; Ishihama, Kohei; Takehara, Kenji (2014). "Redetermination of diaquatris(4-oxopent-2-en-2-olato-κ2O,O′)lanthanum(III)". Acta Crystallographica Section E. 70 (7): m258 –m259. doi:10.1107/S1600536814013336. PMC   4120584 . PMID   25161523.
  3. ↑ Phillips, Theodore; Sands, Donald E.; Wagner, William F. (1968). "Crystal and Molecular Structure of Diaquotris(acetylacetonato)lanthanum(III)". Inorganic Chemistry. 7 (11): 2295–2299. doi:10.1021/ic50069a024.
  4. ↑ Tamang, Sem Raj; Singh, Arpita; Bedi, Deepika; Bazkiaei, Adineh Rezaei; Warner, Audrey A.; Glogau, Keeley; McDonald, Corey; Unruh, Daniel K.; Findlater, Michael (2020). "Polynuclear Lanthanide–Diketonato Clusters for the Catalytic Hydroboration of Carboxamides and Esters". Nat. Catal. 3 (2): 154–162. doi:10.1038/s41929-019-0405-5. S2CID   209897045.
  5. ↑ Dutt, N.K.; Banyopadhyay, P. (1964-05-01). "Chemistry of the lanthanons—XIII". Journal of Inorganic and Nuclear Chemistry. 26 (5): 729–736. doi:10.1016/0022-1902(64)80316-X. Archived from the original on 2018-06-24. Retrieved 2021-09-20.
  6. ↑ Gavrilenko, V. V.; Chekulaeva, L. A.; Savitskaya, I. A.; Garbuzova, I. A. Synthesis of yttrium, lanthanum, neodymium, praseodymium and lutetium alkoxides and acetylacetonates(in Russian). Izvestiya Akademi Nauk, Seriya Khimicheskaya, 1992. 11: 2490-2493. ISSN   1026-3500.
  7. ↑ Hussein, Gamal A.M.; Ismail, Hamdy M. (1995-08-01). "Characterization of lanthanum oxide formed as a final decomposition product of lanthanum acetylacetonate: thermoanalytical, spectroscopic and microscopic studies". Powder Technology. 84 (2): 185–190. doi:10.1016/0032-5910(95)02984-A. Archived from the original on 2018-06-03. Retrieved 2021-09-20.
  8. ↑ Ding, Yi; Gu, Jun; Zhang, Tao; Yin, An-Xiang; Yang, Lu; Zhang, Ya-Wen; Yan, Chun-Hua (2012-02-15). "Chemoaffinity-Mediated Synthesis of NaRES2-Based Nanocrystals as Versatile Nano-Building Blocks and Durable Nano-Pigments". Journal of the American Chemical Society. 134 (6): 3255–3264. doi:10.1021/ja211103b. ISSN   0002-7863. PMID   22242812. Archived from the original on 2019-04-20. Retrieved 2021-09-20.
  9. ↑ Wang, Yang; Kumar, Rishi; Roller, Justin; Maric, Radenka (2017-06-01). "Synthesis and Characterization of Nano-crystalline La2Zr2O7 Film by Reactive Spray Deposition Technology for Application in Thermal Barrier Coatings" . MRS Advances. 2 (28): 1519–1525. doi:10.1557/adv.2017.154. ISSN   2059-8521. S2CID   136079675 . Retrieved 2021-09-20.
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