Synthesis and structural characterization of the lanthanide Schiff-base complexes {N[CH2CH2N=CH(2-O-3,5-t-Bu2C6H2)]3}Ln (Ln = Sm, Nd)

被引：41

作者：

Essig, MW ^{[1
]}

Keogh, DW ^{[1
]}

Scott, BL ^{[1
]}

Watkin, JG ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87545 USA

来源：

POLYHEDRON | 2001年 / 20卷 / 05期

关键词：

Schiff base; samarium; neodymium; amide; heptadentate;

D O I：

10.1016/S0277-5387(00)00565-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reaction of LnEN(SiMe3)(2)](3) (Ln=Sm, Nd) with one equivalent of the bulky heptadentate Schiff-base ligand N[CH2CH2N=CH(2-OH-3,5-t-Bu2C6H2)(3), (1) resulted in formation of the 7-coordinate complexes {N[CH2CH2N=CH(2-O-3:5-t-Bu2C6H2)](3)}Ln (Ln = Sm (2), Nd (3)). X-ray diffraction studies of 2 and 3 reveal isostructural hemi-toluene solvate complexes in which the N4O3 donor atom set of the ligand defines a slightly distorted capped octahedral geometry about the metal center. Ln-N bond lengths are of two types - an average of 2.556(3) Angstrom (2) (2.587(5) Angstrom (3)) to the three imine nitrogens, and a significantly longer interaction of 2.818(4) Angstrom (2) (2.811(5) Angstrom (3)) with the apical amine nitrogen. Ln-O distances lie in the range 2.218(3)-2.232(4) Angstrom for 2 and 2.241(6)-2.248(4) Angstrom for 3. (C) 2001 Published by Elsevier Science B.V. All rights reserved.

引用

页码：373 / 377

页数：5

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