NEW CHARGE-TRANSFER COMPLEX-BASED ORGANIC FERROMAGNETS - PYRIDINIUM-SUBSTITUTED IMIDAZOLIN-1-OXYL TETRAFLUOROTETRACYANOQUINODIMETHANIDE OR HEXACYANOBUTADIENIDE SALTS/

The charge-transfer (CT) complexes of a series of 4,4,5,5-tetramethyli midazolin-1-oxyls substituted with 4-(N-alkylpyridinium) groups at the 2-position with two radical anions, tetrafluorotetracyanoquinodimetha nide (TCNQF(4)(-.)) and hexacyanobutadienide (HCBD-.) were prepared an d their magnetic properties were investigated in the temperature range of 5 to 300 K. Ferromagnetic interaction was observed for the three C T complexes. Furthermore, the magnetic measurement at lower temperatur es than 5 K showed that these CT complexes exhibited a ferromagnetic p hase transition between 0.4 and 0.55 K. Consequently, the present CT c omplexes make a group of another type of organic ferromagnets without any magnetic metal elements.