Organoamido‐ and Aryloxo‐Lanthanoids, 17 Novel Low‐Coordinate Lanthanoid (II) and ‐(III) Aryloxide Complexes ‐ the X‐ray Structures of Bis (2,6‐diphenylphenolato) tris(tetrahydrofuran)‐ytterbium (II), Bis(1,2‐dimethoxyethane)bis(2,6‐diphenylphenolato)ytterbium(II),‐neodymium(III)

Autor:	BW Skelton, Allan H. White, Peter C. Junk, Tiecheng Feng, Glen B. Deacon
Rok vydání:	1997
Předmět:	Lanthanide Ytterbium Ligand Chemistry Inorganic chemistry chemistry.chemical_element Crystal structure Trigonal prismatic molecular geometry Dimethoxyethane Inorganic Chemistry Crystallography chemistry.chemical_compound Trigonal bipyramidal molecular geometry Tetrahydrofuran
Zdroj:	Chemische Berichte. 130:851-857
ISSN:	0009-2940
DOI:	10.1002/cber.19971300707
Popis:	Reduction of [Yb(Odpp)3(THF)2(HOdpp = 2,6-diphenylphenol; THF = tetrahydrofuran) with ytterbium powder and mercury metal yields [Yb(Odpp)2(THF)3] (1) which on crystallization from DME gives [Yb(Odpp)2(DME)2] (2) (DME = 1,2-dimethoxyethane). Crystallization of the reactant [Yb(Odpp)3(THF)2] from DME yields [Yb(Odpp)3(DME)]. (DME)0,5 (3) and of [Nd(Odpp)3(THF)2] from DME/THF the analogous [Nd(Odpp)3(DME)]. (THF) (4). The X-ray crystal structure of 1 reveals distorted trigonal bipyramidal five-coordinate ytterbium with axial Odpp ligands [O-Yb-O 164.6(3)˚], and unsymmetrically distributed equatorial THF ligands [O-Yb-O 137.5(3), 138.8(3), 83.7(4)°] owing to two close H(Ph)...Yb approaches (3.1-3.2 A). In 2, there is trigonal prismatic six-coordination with an Odpp ligand on each triangular face and DME ligands bridging the triangular faces. Both 3 and 4 have distorted square planar five-coordination for the lanthanoid metals with an apical Odpp ligand and cisoid Odpp ligands and a chelating DME in the square plane.
Databáze:	OpenAIRE
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