Enhancing SIM behaviour in a mononuclear tetrahedral Co(N,N′-2-iminopyrrolyl)2 complex

摘要

A new homoleptic Co(ii) complex bearing two highly sterically congested 2-formiminopyrrolyl N,N′-chelating ligands is reported, displaying slow relaxation of the magnetisation at zero static (DC) field. This compound shows a large value for the zero-field splitting (ZFS) parameter D of −42.6(4) cm−1 leading to a spin-reversal energy barrier Ueff of 85 cm−1.