Synthesis and magnetic properties of the novel dithiadiazolyl radical, p-NCC6F4C6F4CNSSN*.
The dithiadiazolyl radical p-NCC6F4C6F4CNSSN* (4) retains its monomeric nature in the solid state with molecules linked together into chains via supramolecular CN-S interactions. Variable temperature magnetic studies on 4 show that it behaves as a near-ideal Curie paramagnet (|theta| less than 0.1 K), indicating negligible intermolecular exchange. The effective magnetic moment (1.78 micro(B)) is temperature independent and in excellent agreement with the value expected for an S = 1/2 paramagnet with g = 2.01(1.74 micro(B)). The lack of exchange coupling between radicals is attributed to the absence of significant orbital overlap between radical centres.
Alberola
Antonio
A
Department of Chemistry, The University of Cambridge, Lensfield Road, Cambridge UK.
Less
Robert J
RJ
Palacio
Fernando
F
Pask
Christopher M
CM
Rawson
Jeremy M
JM
D018360:Crystallography, X-Ray; D005609:Free Radicals / Q000138:chemical synthesis* / Q000737:chemistry*; D008280:Magnetics; D008958:Models, Molecular; D013696:Temperature; D013830:Thiadiazoles / Q000138:chemical synthesis* / Q000737:chemistry*
D005609:Free Radicals; D013830:Thiadiazoles