Ferromagnetic order in a novel imino nitroxide (IT)Py(C CH) radical derived from 2‐ethynyl‐pyridine

Abstract

Purely organic ferromagnets are rare , the main problem being the relative orientation of the spins in a three‐dimensional network. The first example of ferromagnetic ordering in an imino‐nitroxide radical is reported. A detailed analysis of the structure reveals that CCHO hydrogen bonds are responsible for both the crystal packing and the ferromagnetic spin interactions within an infinite chain of ordered molecules. This radical is unique: its structure is the first demonstration of the use of terminal acetylenes to generate supramolecular networks.