Abstract
This paper reports on our studies of the crystal structures and magnetic properties of five mixed-ligand octahedral complexes of Ni(II) with 3-imidazoline nitroxides Ni(RL)2X2, where RL are deprotonated enaminoketone derivatives of 3-imidazoline nitroxide with different substituents R (CF3, Ph) in the side chain, and X is pyridine, dimethylsulfoxide, or semi-phenanthroline. It is established that this type of heterospin system is characterized by an intramolecular exchange interaction parameter (J) of an order of 10 cm−1. Substitution of the N-donor diamagnetic pyridine or phenanthroline by the O-donor dimethylsulfoxide in the coordination sphere of the metal decreases J by 2–3 cm−3. A transition from trans-to cis-coordination of the enaminoketone ligands and variation of the R substituent in the chelate ring do not affect the value of J.
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Deceased.
Translated fromZhurnal Struktumoi Khimii, Vol. 39, No. 5, pp. 901–916, September–October, 1998.
This work was supported by INTAS grant No. 94-3508 and RFFR grants No. 96-03-33738 and 96-03-32229.
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Ovcharenko, V.I., Romanenko, G.V., Korobkov, I.V. et al. Crystal structure and magnetic properties of the octahedral complexes of Ni(II) with 3-imidazoline nitroxides. J Struct Chem 39, 734–746 (1998). https://doi.org/10.1007/BF02903547
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DOI: https://doi.org/10.1007/BF02903547