A Persistent Dipotassium 1,2,4‐Diazaphospholide Radical Complex: Synthesis, X‐Ray Structure, and Bonding

Abstract

Staying power: A persistent 1,2,4-diazaphospholide dianion radical complex (see picture; N blue, P purple, K teal, O red) with a triple-decker conformation was prepared by one-electron reduction of 1,2,4-diazaphospholide anion with potassium in the presence of [18]crown-6. Computations suggested that the unpaired electron in the [3,5-Ph2dp].2− radical anion is delocalized (spin density: pink) to all three rings of the 1,2,4-diazaphospholide and the phosphorus atom.