MAGNETIC-PROPERTIES OF NITRONYL NITROXIDE RADICALS SUBSTITUTED IN PHENYLBORONIC ACID - THE BOH-CENTER-DOT-CENTER-DOT-CENTER-DOT-O HYDROGEN-BOND AS A CONSTITUENT UNIT OF A ONE-DIMENSIONAL SUPRASTRUCTURE EXHIBITING A FERROMAGNETIC SPIN INTERACTION

Communication: The NO ... HOB hydrogen bond has recently been shown to play a role as an intermolecular ferromagnetic spin coupler. Studies of this bond in phenylboronic acid derivatives substituted by the nitr onyl nitroxide radical moiety are presented, in particular the synthes is, crystal structure, and magnetic properties of the para-substituted phenylboronic acid shown in the Figure and the corresponding meta com pound. Boronic acid derivatives bearing the NO radical center are show n to be promising precursors for molecular magnetic materials.