865-33-8Relevant articles and documents
Evaluating Electron Transfer Reactivity of Rare-Earth Metal(II) Complexes Using EPR Spectroscopy
Moehring, Samuel A.,Evans, William J.
, p. 1187 - 1194 (2020)
To evaluate the relative reducing capacities of rare-earth metal complexes of Sc(II), Y(II), and complexes of the lanthanide metals in their +2 oxidation state, a series of reactions of trivalent LnIIIA3 compounds with divalent [Ln′IIA′3]1- complexes has been examined, where Ln = Sc, Y, or a lanthanide and A is C5H4SiMe3 (Cp′), C5H3(SiMe3)2 (Cp″), C5Me4H (Cptet), N(SiMe3)2 (NR2), 2,6-tBu2-C6H3O (OAr), or 2,6-tBu2-4-Me-C6H2O (OAr′). The specific combinations were chosen to allow evaluation by EPR spectroscopy of the Ln(II) complex. The [LnIICp′3]1- complexes of Y(II), La(II), and Lu(II) have similar reducing abilities in that they all reduce LnIIICp′3 complexes of the other metals in this group. However, these Y(II), La(II), and Lu(II) complexes all are stronger reductants than [GdIICp′3]1-, which cannot reduce LnIIICp′3 complexes of Y, La, and Lu. These results do not apply to all ligand sets, since [GdII(NR2)3]1- can reduce YIII(NR2)3 to [YII(NR2)3]1-. The amide and aryloxide complexes of Y and Sc are similar in that [YII(NR2)3]1- reduces ScIII(NR2)3 and [YII(OAr′)3]1- reduces ScIII(OAr′)3. Both [YII(NR2)3]1- and [YII(OAr′)3]1- reduce YIIICp′3. [LaIICptet3]1- has reductive capacity similar to that of [LaIICp′3]1-, and both are stronger reductants than [LaIICp″3]1-. None of the LnIII2 complexes of Sm, Tm, Dy, and Nd can reduce LnIIIA3 complexes of Y and La to [LnIIA3]1-. In the same-metal-different-ligands reactions, multiple EPR signals are found, suggesting that ligand exchange occurs alongside the electron transfer reactivity.
Preparation method for low residual granular sodium alkoxide or potassium alcoholate
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Paragraph 0025-0026, (2017/01/17)
The invention provides a preparation method for low residual granular sodium alkoxide or potassium alcoholate. The method includes using sodium or potassium and alcohol as raw materials, mixing the mixture with a solvent, reacting in inert gas atmosphere by using a microwave heating method, and removing the residual alcohol and solvent in the presence of microwave after the reaction to get the granular sodium alkoxide or potassium alcoholate. The microwave frequency is 2450 +/- 50 MHz. The method can prepare sodium alkoxide or potassium alcoholate with low residual solvent, and the prepared sodium alkoxide or potassium alcoholate is large granular solid, so that the development from powdered product to granular product can be realized, and the problems of residual solvent and potential risk troubled human for a long time can be overcome.
Process for preparation of dicarboxylic acid monoesters
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, (2008/06/13)
A process for producing a dicarboxylic acid monoester which comprises subjecting a dicarboxylic acid monoester or an alkali metal salt of a dicarboxylic acid monoester and a metal alkoxide to transesterification in the presence of an organic solvent, or a process for producing a dicarboxylic acid monoester which comprises subjecting a dicarboxylic acid monoester or an alkali metal salt of a dicarboxylic acid monoester and an alcohol to transesterification in the presence of a metal alkoxide.