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A palladium(II) complex with imino nitroxides, [PdCl2(immepy)2][immepy = 2-(6-methylpyridyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxy], shows a strong antiferromagnetic interaction between the coordinated imino nitroxides, which results from indirect overlap of radical SOMOs through a dxy orbital.
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Oshio et al. (1996) studied this question.
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