EPR STUDIES OF THE BISTABILITY IN CF3CNSSN |
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| Authors: | Delia A Haynes Eric J L McInnes Jack Passmore Jeremy M Rawson |
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| Institution: | 1. University of Cambridge , Cambridge, United Kingdom;2. University of Manchester , Manchester, United Kingdom;3. The University of New Brunswick , Fredericton, New Brunswick, Canada |
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| Abstract: | Condensation of CF3C(═NH)NH2 with SCl2 yielded the dithiadiazolylium salt, CF3CNSSN]Cl which could be reduced to CF3CNSSN]2 with Zn/Cu couple in SO2. CF3CNSSN]2 is a diamagnetic dimer in the solid state but melts at 308 K to give a paramagnetic liquid. On cooling the radical enters a metastable state before immediately re-solidifying below 295 K. The thermal hysteresis was probed by EPR spectroscopy. Metastable samples spontaneously solidified after an induction period, typically between ca. 5 and 30 min, consistent with the variable time necessary to form a seed crystal from which crystallization can occur. |
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| Keywords: | Bistability dithiadiazolyl metastable |
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