Electronic absorption spectra and the structure of the ligand in metal complexes with purpurin

Purpurin complexes with metals are formed due to metal coordination at the peri- or ortho-hydroxycarbonyl group involving anthraquinoid tautomers. The _l,* bands of metal purpurinates correspond to 1,10- and 1,4-anthraquinoid anions, 9,10-anthraquinoid structures are not typical of them.Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 3, 2005, pp. 237–240.Original Russian Text Copyright © 2005 by Fain, Zaitsev, Ryabov.This revised version was published online in April 2005 with a corrected cover date.This revised version was published online in April 2005 with a corrected cover date.