Quinone-Amine Reactions, XXVI: Concerning the Hypsochromic Effect of the C-3 Debromination of some 2-Amino-3,5,6-tribromo-1,4-benzoquinones

Article abstract of DOI:10.1002/ardp.19883210511

The blue 2-amino-3,5,6-tribromo-1,4-benzoquinones 4a-m are debrominated at C-3 by daylight yielding the violet 2-amino-5,6-dibromo-1,4-benzoquinones 5a-m.A comparison of the (13)C-NMR-spectra of 4a-m with those of 5a-m shows that this hypsochromic effect