Complexes of the Bis(di‐tert‐butyl‐aniline)amine Pincer Ligand: The Case of Copper

Abstract

The N,N-bis(2-amino-3,5-di-tert-butylphenyl)amine pincer ligand was coordinated to copper. Depending on the copper source, a mononuclear complex 1 + or a trimer 2 could be isolated and were structurally characterized. Complex 1 + consists of two deprotonated iminobenzoquinone ligands coordinated to a Cu(I) center. Complex 2 is trinuclear with a (3:3) (M:L) stoichiometry, featuring a threefold repetition of a unit made of a Cu(II) center coordinated to a tridentate ligand radical-dianion. In 2, the metal ions are bridged by an anilido nitrogen. The coordination sphere of each copper is completed to four by a neighboring iminosemiquinone moiety. Complex 1 + belongs to an electron-transfer series.

Rhodium diamidobenzene complexes: a tale of different substituents on the diamidobenzene ligand

“…[27][28][29] Additionally, the [NR] handle allows steric and electronic tuning in the direct vicinity of the reaction center. This has also enabled the development of redox-active tri [30][31][32][33][34] -and tetradentate [35][36][37][38] ligand systems based on diamidobenzene. In this context, it is worthwhile mentioning, that a majority of work that deals with such ligands have focussed on R = aryl substituents on the [NR] group.…”