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The metalloporphyrin nitrone complexes [M(oep)-(CO)(DMPO)] (M = Ru, Os; oep = octaethylporphyrinato dianion; DMPO = 5,5-dimethyl-1-pyrroline N-oxide) have been prepared: the crystal structure of the Ru complex reveals a sole eta 1-O binding mode of the nitrone ligand to the metal center.
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Lee et al. (2002) studied this question.
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