[S(N<i>t</i>Bu)₃]²⁻—A Cap‐Shaped Dianion, Isoelectronic with the Sulfite Ion and Oxidizable to a Stable Radical Anion

Abstract

Two dianionic caps, linked by four lithium atoms, characterize the structure of the Li salt 1 of the tripodal ligand [S(NtBu)3]2−. On addition of THF to 1 one lithium atom leaves the inner region and coordinates to only two N atoms and a THF molecule. Oxidation of white 1 with O2 or iodine leads to a dark blue, stable radical monoanion.