A novel paramagnetic dithiadiazolyl radical: Crystal structure and magnetic properties of p-BrC6F4CNSSN center dot

The dithiadiazolyl radical p-BrC6F4CNSSN. 2 retains its monomeric nature in the solid state; variable temperature magnetic studies on 2 indicate Curie -Weiss behaviour (theta = -27 K) above 60 K with an effective magnetic mome nt of 1.45 mu(B) at room temperature; the absence of long-range magnetic or der down to 1.8 K is attributed to the low dimensionality of the magnetic e xchange pathway predicted on the basis of the inter-molecular S ... N inter actions.