Two thermally induced N–S bond cleavage processes are available to EN5S3 heterocycles: (i) an irreversible loss of NSN to form EN3S2(for E = PR2 and SO2–) and (ii) a pseudo-degenerate 1,3-nitrogen shift which exchanges all nitrogen atoms (for E = CPh).
R. T. Boeré, R. T. Oakley and M. Shevalier, J. Chem. Soc., Chem. Commun., 1987, 110 DOI: 10.1039/C39870000110
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