Confusion but no doubt: Two types of PtII dimer complexes of N-confused porphyrin (depicted) were synthesized and the structures were unequivocally elucidated by X-ray crystal analyses. Both complexes contain a metallocycle that binds to a Pt center by an outer-nitrogen atom of the confused porphyrin, and by an ortho-carbon atom of a meso-aryl group.
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Furuta et al. (2003) studied this question.
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