Control of Structure and Magnetic Interaction Through Ligand Design: One‐Dimensional Complexes from Ferromagnetic to Antiferromagnetic Coupling

Autor:	Rayyat Huseyn Ismayilov, Shie-Ming Peng, Rui-Ren Wang, Wen-Zhen Wang, Gene-Hsiang Lee, Hsin-Ta Wang
Rok vydání:	2007
Předmět:	Pyrazine Ligand Stereochemistry chemistry.chemical_element Copper Spectral line law.invention Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Atomic orbital Ferromagnetism Zigzag law Electron paramagnetic resonance
Zdroj:	European Journal of Inorganic Chemistry. 2008:312-321
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.200700881
Popis:	Four unsymmetrical pyrazine- and/or 4-picoline-modulated N,N′-bis(α-pyridyl)-2,6-diaminopyridine ligands (PMN5) were synthesized and their 1D copper(II) complexes studied. When pyrazine is a terminal ring, the ligands showed in-plane and out-of-plane coordination modes and led to a one-dimensional zigzag chain polymer. The orthogonal overlap of orbitals through a bridging pyrazine ring resulted in ferromagnetic interaction. Middle-ring pyrazine-modulated ligands resulted in straight one-dimensional compounds and had antiferromagnetic coupling. The EPR spectra of the compounds showed significant covalency in the Cu–N bonds.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Databáze:	OpenAIRE
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