Menafova Y. N-Arylsulfonyl-p-quinonemono- and diimines with steric strein atom of nitrogen

The existens of steric strein atom of nitrogen in N-substituted p-quinoneimines with two substituents in (-positions to bond C=N has been predicted on base of magnitude of valenсy angle C=N-X with use of modeles "Tartu Models". The predicted increase of angle C=N-S for N-arylsulfonyl-p-quinoneimines with strein atom of nitrogen is born out by data of X-ray spectrometry. The spectra of NMR 1H and NMR 13C of 3,5-dimethyl-N-arylsulfonyl-p-quinoneimines have been studied. They revealed existence of degeneracy Z,E-isomerisation. The reaction of N-arylsulfonyl-p-quinoneimines with steric atom of nitrogen have been studied. The main process for these reactions is the 1,2-addition with formation of quinolid structure.