ИСТИНА

We have reported on the design, synthesis and complex ability of a series of spironaphthoxazine bearing different substituents on the basic skeleton [1-3]. Under steady UV irradiation, spironaphthoxazines containing hydroxyl substituent at the 5′ position in the naphthoxazine moiety, form complexes in polar solvents with Al(III), Cu(II) and Fe(II), those containing benzothiazolyl substituent with Co(II), Ni(II), Zn(II), and with sulfobutyl substituent on the indoline part of the molecule with Mg(II), Ca(II), Cd(II), Zn(II), и Pb(II) Continuing our investigations on this series of compounds, here we describe our spectroscopic studies to determine the effect of solvent and structure on the equilibrium between SO and MC.