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Control of Structure and Magnetic Interaction Through Ligand Design: One‐Dimensional Complexes from Ferromagnetic to Antiferromagnetic Coupling
Author(s) -
Wang WenZhen,
Ismayilov Rayyat Huseyn,
Lee GeneHsiang,
Wang HsinTa,
Wang RuiRen,
Peng ShieMing
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700881
Subject(s) - pyrazine , chemistry , crystallography , antiferromagnetism , ferromagnetism , ring (chemistry) , bridging ligand , zigzag , inductive coupling , electron paramagnetic resonance , copper , atomic orbital , ligand (biochemistry) , molecular orbital , stereochemistry , molecule , nuclear magnetic resonance , crystal structure , condensed matter physics , electron , geometry , organic chemistry , biochemistry , physics , mathematics , engineering , quantum mechanics , receptor , electrical engineering
Abstract 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)