Ferromagnetic interactions in Mn(II) coordination complex containing nitronyl nitroxide radical and silver-dicyanide anion: structure and magnetic studies of Mn~(II)(NITpPy)_2[Ag(CN)_2]_2

摘要

A new complex of formula, Mn(NITpPy)_2[Ag(CN)_2]_2, where NITpPy stands for 2-(4-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, was synthesized and characterized structurally and magnetically. The Mn atom is in a distorted octahedral geometry. It is coordinated to two organic radicals and [Ag(CN)_2]~- anions. Each [Ag(CN)_2]~- unit is #mu#_2 bridging between two adjacent Mn ions yielding infinite 1D chains. Intramolecular ferromagnetic interactions are observed but antiferromagnetic interactions dominate at very low temperature.