One-dimensional magnetic chain composed of CuII and polychlorinated dipyridylphenylmethyl radical: temperature-dependent Jahn–Teller distortion correlated to π-conjugation and magnetic properties.

The one-dimensional coordination polymer composed of Cu^II and an organic radical bisPyTM displayed temperature dependent Jahn–Teller distortion, which is correlated to the π-conjugation mode at the ligand as well as the magnetic properties. The ferromangetic bisPyTM–Cu^II interaction was enhanced by the reorientation of the Cu^II d_x²−y² orbital at low temperature. [ABSTRACT FROM AUTHOR]