HIGH-TEMPERATURE MAGNETIC-ORDERING IN A NEW ORGANIC MAGNET

Magnetization, heat capacity, and neutron diffraction experiments on t he beta-phase of the dithiadiazolyl radical, p-NC.C6F4.CNSSN., provide conclusive evidence that this system exhibits noncollinear antiferrom agnetism at 35.5 K, an unprecedented temperature for an organic radica l. On the basis of magnetization and powder neutron diffraction result s, coupled with theoretical calculations of the spin distribution with in the molecule, a magnetic structure for this compound is proposed in which the interactions propagate through S ... N contacts.