Porphin

Porphine or porphin is a organic chemical compound with formula C20H14N4. The molecule consists of four pyrrole-like rings joined by four methine (=CH−) groups to form a larger macrocycle ring, which makes it the simplest of the tetrapyrroles. It is an aromatic and heterocyclic compound, solid at room temperature. Derivatives of protoporphyrin IX are common in nature, the precursor to hemes.Octaethylporphyrin (H2OEP) is a synthetic analogue of protoporphyrin IX. Unlike the natural porphyrin ligands, OEP2− is highly symmetrical.Tetraphenylporphyrin (H2TPP)is another synthetic analogue of protoporphyrin IX. Unlike the natural porphyrin ligands, TPP2− is highly symmetrical. Another difference is that its methine centers are occupied by phenyl groups. Porphine or porphin is a organic chemical compound with formula C20H14N4. The molecule consists of four pyrrole-like rings joined by four methine (=CH−) groups to form a larger macrocycle ring, which makes it the simplest of the tetrapyrroles. It is an aromatic and heterocyclic compound, solid at room temperature. Porphine does not occur in nature, and is almost only of theoretical interest; however, substituted derivatives include many biochemically significant compounds called porphyrins, with the dominant example being protoporphyrin IX. Many synthetic analogues are also known, including octaethylporphyrin and tetraphenylporphyrin.