The chemistry of thionitroxyl radicals

Differentiation of isomeric sulfur heterocycles by electron ionization mass spectrometry: 1,4‐dithiins, 1,4‐dithiafulvenes and their analogues tetrathianaphthalenes, tetrathiafulvalenes and tetrathiapentalenes

“…The EI + mass spectra of 1 and 2 are summarized in Table 1. When comparing these spectra to those previously reported, it can be seen that the spectrum of 1 closely matches that described by Buess et al .,9,10 while the spectrum of 2 displays less fragmentation than reported 10,11. These differences in the extent of fragmentation may be due to differences in the source and/or probe temperatures, which we have already observed to have a marked effect on the spectra of some related compounds 12…”

Novel Thione-Thiol Rearrangement of Dithiocarbonic Acid O-(2,2,6,6-Tetramethylpiperidin-1-yl) Ester in the Context of Controlled Radical Polymerization

“…Decomposition of N-mercapto amines to amines and sulfur is known. [24] We suppose that the main contribution to the thermodynamic driving force of the novel rearrangement originates from the transformation of a relatively weak C=S bond into a strong C=O bond. Indeed, calculations with DFT and Moeller-Plesset theory (see Experimental) lead to the same result indicating that the ground state energy (298 K, 1 atm) of 9 is 132.9 kJ/mol resp.…”