title: Synthesis, structure, and aromaticity of the nickel(II) complex of pyricorrole, a molecular hybrid of porphyrin and corrole.
abstract: Formal migration of one meso-carbon atom in the porphyrin ring into the pyrrole moiety results in an isomer "pyricorrole", a pyridine-containing corrole macrocycle. We prepared the nickel(II) complex of pyricorrole by the nickel(II)-induced cyclization of a linear precursor. Electronic absorption and proton NMR spectra of this compound revealed the presence of an 18π-electron circuit over the macrocycle, suggesting that aromaticity was retained after  intensive rearrangement of the porphyrin core. X-ray crystallography of the nickel(II) complex confirmed the planar structure and demonstrated that it possesses  hybrid properties of porphyrin and corrole.
authors.affiliation: Department of Physical Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, Chuoh-Inohana, Chiba 260-8675, Japan. sneya@p.chiba-u.ac.jp
authors.forename: Saburo
authors.initials: S
authors.lastname: Neya
authors.forename: Masaaki
authors.initials: M
authors.lastname: Suzuki
authors.forename: Takashi
authors.initials: T
authors.lastname: Matsugae
authors.forename: Tyuji
authors.initials: T
authors.lastname: Hoshino
mesh_terms: D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D011166:Porphyrins; D011758:Pyrroles; D009532:Nickel