These authors contributed equally to this work.
Four Discrete Transition Metal Complexes Involving Pyridyl-substituted Nitronyl Nitroxide: Syntheses, Crystal Structures, and Magnetic Properties†
Article first published online: 20 SEP 2013
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Zeitschrift für anorganische und allgemeine Chemie
Volume 640, Issue 2, pages 363–369, February 2014
How to Cite
Zhou, J., Du, L., Hu, Y., Chen, P., Li, B. and Zhao, Q.-H. (2014), Four Discrete Transition Metal Complexes Involving Pyridyl-substituted Nitronyl Nitroxide: Syntheses, Crystal Structures, and Magnetic Properties. Z. anorg. allg. Chem., 640: 363–369. doi: 10.1002/zaac.201300266
Supporting Information for this article is available on the WWW under http://dx.doi.org/10.1002/zaac.201300266 or from the author.
- Issue published online: 3 FEB 2014
- Article first published online: 20 SEP 2013
- Manuscript Accepted: 20 SEP 2013
- Manuscript Received: 28 MAY 2013
- National Natural Science Foundation of China. Grant Number: 21061016
- Yunnan Provincial Department of Education Research Fund. Grant Number: 2011Y111
- Magnetic properties;
- Nitronyl nitroxide radical;
Four discrete metal-radical complexes, [Cu(p-MePh-COO)2(NITpPy)2] (1), [Ni(m-MePhCOO)2(NITpPy)2(H2O)2]·(CH3-OH)2 (2), [Mn(p-MePhCOO)2(NITpPy)2(H2O)2] (3), and [Mn(m-MePhCOO)2(NITpPy)2(H2O)2] (4) [NITpPy = 2-(4-pyridyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxyl-3-oxide] were synthesized and characterized by elemental analyses, IR spectroscopy, PXRD, single-crystal X-ray diffraction, and magnetic susceptibility. For the four complexes, the crystal structural analyses indicate that the two radical ligands coordinated to the metal ions by the nitrogen atoms of the pyridine rings form three spin complexes, where toluates act as co-ligands. Weak antiferromagnetic interactions [JCu–Rad = –6.75 cm–1 (1), JCo–Rad = –4.15 cm–1 (2), JMn–Rad = –0.22 cm–1 (3), and JMn–Rad = –3.74 cm–1 (4)] were observed, spin polarization mechanism and orbital symmetry are used to explain the magnetic coupling in these complexes.