Modified porphyrinoids from carbazates and hydrazones and the first crystal structure of a di-iminoporphodimethene

Coupling of hydrazines and hydrazones with bromoporphyrins and their Ni(II) and Zn(II) complexes under Pd catalysis, followed by oxidation, leads to novel pigments in which the porphyrin conjugation is interrupted. The crystal structure of a nickel(II) complex of this new porphyrinoid shows a saddle-like geometry.