EPR and ENDOR investigations of chrysazin and aclacinomycin A semiquinones

@inproceedings{Jlich1991EPRAE,
  title={EPR and ENDOR investigations of chrysazin and aclacinomycin A semiquinones},
  author={Thomas J{\"u}lich and Hartmut B. Stegmann and Karsten Krohn and A M Eickhoff},
  year={1991}
}
Different assignments of the coupling constants to distinct positions of chrysazin are given in the literature. Several methyl derivatives, particularly the hitherto unknown l,&dihydroxy-2,3-dimethyl-9,lBanthraquinone, were prepared, and their radical anions were investigated by EPR and ENDOR spectroscopy to achieve a reliable attribution of these values. The data obtained show a remarkable solvent dependence of the spin density distribution. Thus, the discrepancy mentioned above can be… CONTINUE READING
BETA