Stereoselective synthesis and structural characterization of rac-planar chiral bis(2-methoxyethylindenyl)lanthanum and yttrium tetrahydroborates

Authors
Qian, CT Zou, G Nie, WL Sun, J Lemenovskii, DA Borzov, MV
Citation
Ct. Qian et al., Stereoselective synthesis and structural characterization of rac-planar chiral bis(2-methoxyethylindenyl)lanthanum and yttrium tetrahydroborates, POLYHEDRON, 19(16-17), 2000, pp. 1955-1959
Citations number
24
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
POLYHEDRON
ISSN journal
02775387 → ACNP
Volume
19
Issue
16-17
Year of publication
2000
Pages
1955 - 1959
Database
ISI
SICI code
0277-5387(20000915)19:16-17<1955:SSASCO>2.0.ZU;2-X
Abstract
Racemic planar chiral metallocenes bis(2-methoxyethylindenyl) yttrium and l anthanum tetrahydroborates (MeOCH2CH2C9H6)(2)Ln(mu(2)-H)(n)BH4-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 c haracterized by elemental analyses, MS, H-1 NMR and IR spectra. The tetrahy droborate ion has been identified as slipped bidentate (mu(2)-H)(2)BH2 and tridentate (mu(2)-H)(3)BH ligands in 1 and 2, respectively. (C) 2000 Elsevi er Science Ltd. All rights reserved.