Lanthanum alkoxides. Crystal structure of [La6(μ6-Cl)(μ3-OPr i )2(μ-OPr i )9(OPr i )6]
| Autor: | N. Ya. Turova, Sergei I. Troyanov, E. V. Suslova |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials Science (miscellaneous)
Inorganic chemistry chemistry.chemical_element Infrared spectroscopy Crystal structure Methoxide law.invention Catalysis Inorganic Chemistry Metal chemistry.chemical_compound chemistry law visual_art Lanthanum visual_art.visual_art_medium Physical and Theoretical Chemistry Crystallization Isopropyl Nuclear chemistry |
| Zdroj: | Russian Journal of Inorganic Chemistry. 60:1384-1389 |
| ISSN: | 1531-8613 0036-0236 |
| DOI: | 10.1134/s0036023615110182 |
| Popis: | La(OR)3 (R = Me, Et, Pr i , or C2H4OMe) has been synthesized via direct and electrochemical dissolution of metallic lanthanum in alcohols (in the presence of I2 or a HgCl2/HgI2/Hg(OAc)2 mixture catalysts or Bu4NBr or Et3BzNCl electrochemical additives, respectively). Lanthanum methoxide, ethoxide, and n-buthoxide have been synthesized via etherification of La(OPr i )3 and were characterized by IR spectroscopy and mass spectroscopy. The composition and physicochemical characteristics of lanthanum isopropoxide can vary over broad ranges depending on a method of its synthesis. The electrochemical dissolution of lanthanum in isopropanol or in the presence of I2 catalytic amounts yields an insoluble polymeric product, and the synthesis of “La(OPr i )3” in the presence of a HgCl2/HgI2/Hg(OAc)2 mixture results in the crystallization of La6Cl(OPr i )17, whose composition and structure have been established by X-ray diffraction. In a La6(μ6-Cl)(μ3-OPr i )2(μ-OPr i )9(OPr i )6 molecule, lanthanum atoms form a trigonal prism centered by a chlorine atom (La–Cl, 3.14–3.15 A), and isopropyl groups are μ3-bridging, μ2-bridging or terminal (La–O, 2.537, 2.435, and 2.152 A, respectively). |
| Databáze: | OpenAIRE |
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