Synthesis and Magnetic Properties of the Novel Dithiadiazolyl Radical, p-NCC6F4C6F4CNSSNAuthor(s): Antonio Alberola | Robert J. Less | Fernando Palacio | Christopher M. Pask | Jeremy M. Rawson
Journal: Molecules ISSN 1420-3049
Volume: 9; Issue: 9; Start page: 771; Date: 2004;
Keywords: Magnetic properties | dithiadiazolyl | molecular magnetism | organic magnet.
The dithiadiazolyl radical p-NCC6F4C6F4CNSSNÃ¢Â€Â¢ (4) retains its monomericnature in the solid state with molecules linked together into chains via supramolecularCNÃ‚Â·Ã‚Â·Ã‚Â·S interactions. Variable temperature magnetic studies on 4 show that it behaves as anear-ideal Curie paramagnet (|ÃŽÂ¸| less than 0.1 K), indicating negligible intermolecularexchange. The effective magnetic moment (1.78 ÃŽÂ¼B) is temperature independent and inexcellent agreement with the value expected for an S = 1Ã¢ÂÂ„2 paramagnet with g = 2.01(1.74ÃŽÂ¼B). The lack of exchange coupling between radicals is attributed to the absence ofsignificant orbital overlap between radical centres.