82291-24-5Relevant academic research and scientific papers
SYNTHESE UND OXIDATION VON 7-TRIFLUORMETHYLTHIOCYCLOHEPTATRIEN
Hanack, Michael,Kuehnle, Adolf
, p. 3047 - 3048 (1981)
Tropyliumbromide (1) reacts with AgSCF3 to form 7-Trifluoromethylthiocycloheptatriene (6), which on oxidation with p-nitroperbenzoic acid does not form 7-Trifluoromethylsulfonylcycloheptatriene (3a) but the trifluormethylsulfinate 4a.
Coalescence phenomena in the NMR spectra of some cycloheptatrienes
Zwaard, A. W.,Smits, H. J. E.,Kloosterziel, H.
, p. 187 - 191 (2007/10/02)
Coalescence phenomena have been observed in the NMR spectra of a variety of 7-substituted 1,3,5-cycloheptatrienes upon varying temperature and/or solvent.Using two different methods, the energy of activation of the process responsible for coalescence has been determined.Within a group of structurally similar para-substituted phenyl sulphides a linear relation has been found between the energy of activation and the acidity constant of the corresponding benzenethiol, suggesting the occurrence of ion pairs.The relatively low energy of activation for the phenyl sulphides, when compared with the values of the phenyl sulphones, may rewsult from the structure of the intermediate ion pairs.In addition to the above, a digfferent exchange process between cycloheptatrienyl sulphides and tropylium salt via sulphonium ions has been observed.
