Stereoselective synthesis and structural characterization of rac-planar chiral bis(2-methoxyethylindenyl)lanthanum and yttrium tetrahydroboratesстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Racemic planar chiral metallocenes bis(2-methoxyethylindenyl) yttrium and lanthanum tetrahydroborates (MeOCH2CH2C9H6)2Ln(m2-H)nBH4-n (Ln = Y, n = 2 (1); Ln = La, n =3 (2)) have been stereoselectively isolated in high yield by reaction of the corresponding lanthanocene chlorides with sodium borohydride in THF at room temperature. The two complexes have been fully characterized by elemental analyses, MS, 1H NMR and IR spectra. The tetrahydroborate ion has been identified as slipped bidentate (m2-H)2BH2 and tridentate (m2-H)3BH ligands in 1 and 2, respectively.