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Synthesis and Single-Crystal X-ray Diffraction Examination of a Structurally Homologous Series of Tetracoordinate Heteroleptic Anionic Lanthanide Complexes: Ln{N[Si(CH<sub>3</sub>)<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>Si(CH<sub>3</sub>)<sub>2</sub>]}<sub>3</sub>(μ-Cl)Li(L)<sub>3</sub> [Ln = Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb; (L)<sub>3</sub> = (THF)<sub>3</sub>, (Et<sub>2</sub>O)<sub>3</sub>, (THF)<sub>2</sub>(Et<sub>2</sub>O)]

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Anhydrous lanthanide(III) chlorides (Ln = Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb) react with 3 equiv of lithium 2,2,5,5-tetramethyl-2,5-disila-1-azacyclopentanide, in THF or Et2O to afford the monomeric four-coordinate heteroleptic ate complexes (Ln = Sm (1), Eu (2), Gd (3), Tb (4), Dy (5), Ho (6), Er (7), Tm (8), Yb (9)), whose solid-state structures were determined by the single-crystal X-ray diffraction technique. All complexes additionally were characterized by melting point determination, elemental analyses, and mass spectrometry.

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2016-08-18
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