title: A direct link between annulene and porphyrin chemistry--21-vacataporphyrin.
abstract: A novel molecule, aza-deficient porphyrin 5,10,15,20-tetraaryl-21-vacataporphyrin has been synthesised by a substraction of a tellurium atom from 5,10,15,20-tetraaryl-21-telluraporphyrin under treatment of HCl. The new macrocycle is an annulene-porphyrin hybrid and at the same time is directly related to 21-heteroporphyrins but has a vacant space instead of heteroatomic bridge. The molecule preserves the fundamental structural and spectroscopic features of the parental 5,10,15,20-tetraarylporphyrin with three nitrogen atoms and two CH groups favorably prearranged for coordination.
authors.affiliation: Department of Chemistry, University of Wrocław ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Pacholska
authors.forename: Lechosław
authors.initials: L
authors.lastname: Latos-Grazyński
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Ciunik