Ferromagnetic Behavior of Formyl-Group-Carrying Stable Thioaminyl Radicals1
摘要:
Four formyl-group-carrying thioaminyl radicals were generated, and one radical could be isolated as radical crystals. Magnetic susceptibility measurements of the isolated radical showed a ferromagnetic regular linear-chain interaction of 2J/k(B) = 3.2 K, which was explained in terms of the X-ray crystallographic results.
The present invention provides a process for producing a compound of the formula (III): ##STR1## wherein R.sup.1 and R.sup.3 are independently hydrogen or an organic group; R.sup.2 is an organic group; and R.sup.4 is an optionally substituted aryl. by reacting the compound of formula (I): ##STR2## wherein R.sup.1, R.sup.2, and R.sup.3 are as defined above, with the compound of formula (II): R.sup.4 --S--Hal (II) wherein R.sup.4 is as defined above and Hal is halogen, in the presence of base.
crystallographic structures of 1b and 2b are determined by the X-ray crystallographic analyses. Aminyls 1 and 2 give similar ESRspectra consisting of 1:1:1 triplets with the a(N) values of 0.921-0.948 mT. Deuteration of the phenyl groups on the anilino benzene ring gives rise to a further splitting of the nitrogen 1:1:1 triplet by the anilino meta (0.126-0.138) and phenylthiyl ortho and para protons (0.077-0.096
Generation, ESR Spectra, and Isolation of<i>N</i>-(Arylthio)-2,4,6-triarylphenylaminyl Radicals. Influence of the Substituents on the 2,4,6-Triphenyl Groups on the Stabilities of Radicals
作者:Yozo Miura、Yuichi Kitagishi、Sadaharu Ueno
DOI:10.1246/bcsj.67.3282
日期:1994.12
Three N-(Arylthio)-2,4,6-tris(4-methylphenyl)-, three N-(arylthio)-2,4,6-tris(3-chlorophenyl)-, and five N-(arylthio)-2,4,6-tris(4-chlorophenyl)phenylaminyl radicals have been generated by PbO2 oxidation of the corresponding N-(arylthio)-2,4,6-triarylanilines and their isolation has been carried out. When electron-donating methyl groups were substituted at the p-positions of the 2,4,6-triphenyl groups
Triphenylmethyl-substituted Arylthioaminyl Radicals, An ESR Study of<i>N</i>-(Arylthio)triphenylmethylaminyls
作者:Yozo Miura、Mamoru Isogai、Masayoshi Kinoshita
DOI:10.1246/bcsj.58.751
日期:1985.2
The title radicals have been studied by ESR spectroscopy. The radicals are fairly long-lived in solution and satellite lines due to the 33S atom at natural abundance could be observed in their ESR spectra.
<i>N</i>,<i>N</i>′-BIS(ARYLTHIO)BENZAMIDINYL RADICALS. A NEW CLASS OF PERSISTENT NITROGEN-CENTERED FREE RADICALS
作者:Yozo Miura、Teruo Kunishi、Masayoshi Kinoshita
DOI:10.1246/cl.1983.885
日期:1983.6.5
N,N′-Bis(arylthio)benzamidinyl radicals were generated and studied by ESR spectroscopy. They were extremely persistent in solution, even in the presence of oxygen.