Crystalline salts of anionic free-base tetrapyrazinoporphyrazines with alkyl-substituents or an extended π-electron system

Free-base octamethyltetrapyrazinoporphyrazine (H2TPyzPzMe8), octaethyltetrapyrazonoporphirazine (H2TPyzPzEt8), and tetra-2,3-[5,6-(9,10-phenanthro)pyrazino]porphyrazine (H2T(PhnPyz)Pz) have been synthesized by cyclic tetramerization of corresponding dinitriles followed by demetallation of the obtained magnesium complexes. Reduction or deprotonation of these...