Abstract:Photocyclization of 8-aryloxybenzo[e][1,2,4]triazines
leads to the formation of π-expanded flat Blatter radicals for
three phenanthryloxy and pyren-1-yloxy derivatives, whereas no photoreaction
is observed for the perylen-3-yloxy precursor. Two of the new radicals
are nonplanar, out of which one is unstable to isolation. The radical
with the fused pyrene ring constitutes the largest thus far paramagnetic
polycyclic π-system containing seven fused rings with 27 sp2-hybridized atoms and 29 π-delocalized elect… Show more
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