Ferromagnetic End-to-End Azides and Tetrahedral Cobalt: Unusual Findings in the M-BPA-Pseudohalide2 System

被引：9

作者：

De la Pinta, Noelia ^{[1
]}

Luz Fidalgo, M. ^{[3
]}

Lezama, Luis ^{[1
]}

Madariaga, Gotzon ^{[2
]}

Callejo, Lorena ^{[4
]}

Cortes, Roberto ^{[1
]}

机构：

[1] Univ Basque Country, Dept Quim Inorgan, Fac Ciencia & Tecnol, Bilbao 48080, Spain

[2] Univ Basque Country, Dept Fis Materia Condensada, Fac Ciencia & Tecnol, Bilbao 48080, Spain

[3] Univ Basque Country, Fac Farm, Dept Quim Inorgan, Vitoria 01080, Spain

[4] Fdn Tecnalia, Unidad Siderurgia, Derio 48160, Spain

来源：

CRYSTAL GROWTH & DESIGN | 2011年 / 11卷 / 04期

关键词：

POLARIZED NEUTRON-DIFFRACTION; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; MAGNETOSTRUCTURAL CORRELATIONS; NICKEL(II) COMPLEXES; COORDINATION POLYMER; COPPER(II) COMPLEX; GROUND-STATE; MU-AZIDO; LIGANDS;

D O I：

10.1021/cg1015324

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two novel unusual compounds [Co(NCO)(2)(bpa)] (1) and [Cu(N-3)(2)(bpa)] (2) with cyanate and azide pseudohalides are shown in this work. These compounds have been characterized by X-ray diffraction measurements, Fourier transform-infrared (FT-IR) and UV-visible spectroscopies, thermogravimetric studies, electron spin resonance (ESR) spectroscopy, and magnetic measurements. Compound 1 shows a one-dimensional (1D) structure with the cobalt atoms bridged by bpa ligands and with the metal atoms showing an unusual tetrahedral coordination sphere. Compound 2 shows a two-dimensional (2D) structure, where the copper(II) ions are bridged by double 1,3-azido ligands to form chains that are joined through single bpa bridges to give the global 2D structure. Magnetic measurements show predominance of spin orbit coupling for the cobalt compound (1), while ferromagnetic interactions, unusual for the 1,3-azido bridging, are observed in compound 2. This compound represents the first example of copper-double (mu(1,3)-azido)-bridged chain exhibiting ferromagnetic interactions through this kind of bridging.

引用

页码：1310 / 1317

页数：8

共 58 条

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