133886-90-5Relevant academic research and scientific papers
Generation, Isolation, and Characterization of N-(Arylthio)-7-tert-butyl- and N-(Arylthio)-2,7-di-tert-butyl-1-pyrenylaminyl Radicals
Miura, Yozo,Yamano, Eiji,Tanaka, Akio,Yamauchi, Jun
, p. 3294 - 3300 (1994)
N-(Arylthio)-7-tert-butyl-1-pyrenylaminyl (2) and N--2,7-di-tert-butyl-1-pyrenylaminyl radicals (3) are prepared by PbO2 oxidation of N-(arylthio)-7-tert-butyl-1-aminopyrenes and N--2,7-di-tert-butyl-1-aminopyrene, respectively, and studied by ESR and ENDOR spectroscopy.The kinetic ESR study shows that, while aminyls 2 gradually decompose in solution at room temperature, aminyl 3 is quite persistent, even in refluxing benzene, and shows no tendency to dimerize, even at low temperatures.These interesting properties of 3 permit us to isolate 3 as radical crystals in 28-31percent yield.The hyperfine splitting (hfs) constants of 2 and 3, determined by ESR and ENDOR spectroscopic methods, show an extensive delocalization of the unpaired electron onto the pyrene ring.Comparison of the hfs constants of 2 and 3 shows that a more extensive delocalization of the spin into the pyrene ring takes place in 3.This is accounted for in terms of the difference in the conformations of 2 and 3.
N1,N5-Bis(arylthio)-2,4-diphenyl-1,3,5-triazapenta-1,3-dienyl Radicals. An Electron Spin Resonance Study
Miura, Yozo,Tanaka, Akio
, p. 3950 - 3954 (2007/10/02)
A new class of nitrogen-centered free radicals, N1,N5-bis(arylthio)-2,4-diphenyl-1,3,5-triazapenta-1,3-dienyl radicals 1 have been generated by hydrogen atom abstraction from N1,N5-bis(arylthio)-2,4-diphenyl-1,3
