THE INFLUENCE OF CHEMICAL SURROUNDINGS ON THE PROPERTIES OF ALPHA-NITRONYL NITROXIDE RADICALS IN SOLUTION - ITS RELATION WITH THE MAGNETIC-PROPERTIES IN SOLID-STATE

alpha-Nitronyl nitroxide radicals have been widely used for obtaining molecular magnetic materials. We report two characteristics of this ra dicals that are important in order to interpret their bulk magnetic pr operties in the solid state. On one hand, we describe the modification of the spin density distribution in the radical molecule caused by di fferent chemical surroundings and by different substituents using the Linear Solvation Energy Relationship multiparametric approximation. On the other hand, we report the self-assembly of some hydroxylated alph a-nitronyl nitroxides in solution. The supramolecular aggregates, form ed in solution, are found to be very similar than those present in the crystal structures. This fact allows to establish clear magneto-struc tural correlations that facilitate the interpretation of solid state m agnetic properties.