Synthesis and magnetostructural characterization of two ferromagnetic nickel(II) dimers

被引：62

作者：

Barandika, MG

Cortés, R

Lezama, L

Urtiaga, MK

Arriortua, MI

Rojo, T

机构：

[1] Univ Basque Country, Fac Ciencias, Dept Quim Inorgan, E-48080 Bilbao, Spain

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

[3] Univ Basque Country, Fac Ciencias, Dept Mineral Petrol, E-48080 Bilbao, Spain

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1999年 / 17期

关键词：

D O I：

10.1039/a903558c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two new ferromagnetic, end-on azide-bridged nickel(II)-dimers [{Ni(terpy)(N-3)(2)}(2)]. H2O 1 and [Ni-2(terpy)(2)(N-3)(3)(H2O)]ClO4. H2O 2 (terpy = 2,2' : 6',2 "-terpyridine) have been synthesized and magnetostructurally characterized through X-Ray single crystal analysis, IR spectroscopy and magnetic susceptibility measurements. The values of the Ni-N-Ni bridge angle and the magnetic coupling constant, J, are 101.6 degrees and 22.8 cm(-1), respectively, for 1 and 102.5 degrees and 13.6 cm(-1), respectively, for 2. The influence of the Ni-N-Ni bridge angle on the magnetic performance of end-on azide-bridged nickel(II) dimers has been studied by means of extended Huckel molecular orbital calculations. The results indicate that the antiferromagnetic contribution of the global coupling constant decreases for increasing bridge angle between 83 and 115 degrees.

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页码：2971 / 2976

页数：6

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