σ-Delocalization between Non-bonded Selenium Atoms on Multiply Se-substituted Benzenes

Abstract

The delocalization arising from lone-pair interactions of non-bonded selenium atoms in multiply selenium-substituted benzenes is demonstrated. The first oxidation potentials of the compounds shift to a lower voltage as the number of adjacent selenium atoms increases from unity to six. The steric hindrance forces the selenium functionalities to produce σ-delocalization derived from interactions between lone-pair electrons of non-bonded selenium atoms.