Synthesis and biradicaloid character of doubly linked corrole dimers.
Directly linked corrole dimer 1, which has a planar cyclooctatetraene in its core, has been synthesized from 2-borylcorrole in excellent yield. 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) oxidation of 1 provides its oxidized form 4, which has two NH protons in each corrole core. Dicorrole 4 and its Zn(II) complex 6 exhibit broad electronic absorption spectra, and magnetic measurement has revealed their biradicaloid character.
Hiroto
Satoru
S
Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
Furukawa
Ko
K
Shinokubo
Hiroshi
H
Osuka
Atsuhiro
A