The direct reaction of the tBu-DAB ligand with SeCl4: a redox route to selenium–nitrogen heterocycles

Abstract

The reaction of SeCl₄ with the ubiquitous tert-butyl-substituted diazabutadiene ligand results in the isolation of a rare example of a 1,2,5-selenadiazolium cation, representing a novel route to Se–N ring formation; these heterocycles can be derivatised at selenium, which has led to the identification of a short Se⋯N secondary bonding interaction.