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MS investigations of the products obtained by electrophilic nitration of tetrasubstituted porphyrin complexes are described. Cu(II)-Porphyrinates, exhaustively derivatized at the so-called ’eastern half’ [dinitro-, bis(arylsulphonylmethyl-)], in the reaction with 33 % nitric acid (at r.t.; reaction time – ca. 5 h) resulted in the formation of a mixture of many polynitro-substituted products. They were identified by MS-ESI and IR methods and the mode of reactivity of the substrates was explained.

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Attempts of the Synthesis of Highly Functionalized Porphyrins at the β-Positions: Nitration of Exhaustively Substituted Moieties in the ’Eastern Half ’ and Mass-Spectral Study of the Reaction Products