Radical-based ferromagnetic chain in yttrium diphthalocyanine [YPc2]⋅CH2Cl2

Abstract
The structure and magnetic properties of yttrium diphthalocyanine [YPc2]⋅CH2 Cl2 are reported. Phthalocyanine macrocycles are stacked above each other in one direction, with a staggered angle of 45°. One-dimensional organic ferromagnetism is emphasized for the first time, and discussed on the basis of an orbitally degenerate model. A comparison with the behavior of the nonsolvated derivative α-YPc2 is reported.