Conjugation Paths in Oxatriphyrin(2.1.1) – C2 Bridge Modifications

Abstract

An efficiency of delocalization in strongly conjugated systems remains an important factor crucial for modulation of the optical properties directly correlated with its range. An ortho‐substituted phenylene derivative bearing electron donating/accepting functionality was built‐in a fully unsaturated macrocyclic system with a global delocalization of a diatropic and/or a paratropic current. A precisely located structural modification influence observed behaviour in spectroscopic parameters that are only slightly recognizable in 4n+2 systems but showing a significant influence on the reduced derivatives with a contribution of 4n π‐electrons delocalization path.