Oxalate-based 2D magnets: the series [NBu4][MIIMnIII(ox)3] (MII = Fe, Co, Ni, Zn; ox = oxalate dianion)

Abstract

The synthesis, structure and physical properties of the bimetallic oxalate-based molecular magnets containing Mn^III of formula [NBu₄][M^IIMn(ox)₃] (M^II = Fe, Co, Ni, Zn; ox = oxalate dianion) are presented here. All compounds are isostructural, containing two-dimensional honeycomb bimetallic networks formed by alternating M^II and M^III ions connected by oxalate anions. These compounds exhibit antiferromagnetic interactions that give rise to ferrimagnets or weak ferromagnets ordering at critical temperatures up to 21 K.